CA2196905C - Surgical helical fastener with applicator - Google Patents

Surgical helical fastener with applicator

Info

Publication number
CA2196905C
CA2196905C CA002196905A CA2196905A CA2196905C CA 2196905 C CA2196905 C CA 2196905C CA 002196905 A CA002196905 A CA 002196905A CA 2196905 A CA2196905 A CA 2196905A CA 2196905 C CA2196905 C CA 2196905C
Authority
CA
Canada
Prior art keywords
fastener
helical coil
tissue
continuous
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CA002196905A
Other languages
French (fr)
Other versions
CA2196905A1 (en
Inventor
Lee Bolduc
Thomas A. Kramer
Brian A. Hodges
Tim Mccoy
John Lunsford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covidien AG
Original Assignee
Origin Medsystems LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23100566&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2196905(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Origin Medsystems LLC filed Critical Origin Medsystems LLC
Priority to CA002276204A priority Critical patent/CA2276204C/en
Publication of CA2196905A1 publication Critical patent/CA2196905A1/en
Application granted granted Critical
Publication of CA2196905C publication Critical patent/CA2196905C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/064Surgical staples, i.e. penetrating the tissue
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0469Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
    • A61B17/128Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips
    • A61B17/1285Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips for minimally invasive surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00004(bio)absorbable, (bio)resorbable, resorptive
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/06Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
    • A61B17/06066Needles, e.g. needle tip configurations
    • A61B2017/06076Needles, e.g. needle tip configurations helically or spirally coiled
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/06Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
    • A61B17/06166Sutures
    • A61B2017/06171Sutures helically or spirally coiled
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/064Surgical staples, i.e. penetrating the tissue
    • A61B2017/0649Coils or spirals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/0063Implantable repair or support meshes, e.g. hernia meshes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S227/00Elongated-member-driving apparatus
    • Y10S227/901Surgical clip appliers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S227/00Elongated-member-driving apparatus
    • Y10S227/902Surgical clips or staples
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S606/00Surgery
    • Y10S606/907Composed of particular material or coated
    • Y10S606/91Polymer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S606/00Surgery
    • Y10S606/916Tool for installing or removing orthopedic fastener
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/46Pin or separate essential cooperating device therefor
    • Y10T24/4693Pin or separate essential cooperating device therefor having specific wire penetrating portion
    • Y10T24/4695Wire curved or bent

Abstract

A helical fastener (10) having a high retentive surface area is provided and has a first end (22) for enhancing penetration into tissue (25) and a second end (26) comprising a coil sectioning a diameter (18) of the fastener (10) for receiving longitudinal and rotational forces. The helical fasteners (10) are attached to body tissue (25) by a fastener applicator (12) having a proximal portion (28) comprising a handle (30) and an actuator (32) and an elongate distal portion (34) for housing a plurality of fasteners (10). A transferring action of the actuator (32) provides longitudinal and rotational movement of the fasteners (10) out of the distal portion (34) and into body tissue (25).

Description

SURGICAL HELICAL FASTENER WITIi APPLICATOR
BACKGROUND OF THE INVENTION
This invention relates to surgical fasteners and their associated applicators, and more S particularly, surgically fastening material to tissue.
Fasteners have been used surgically to eliminate the need for suturing, which is both time consuming and inconvenient. In many applications the surgeon can use a stapler apparatus, i.e., a fastener implanting device loaded with surgical fasteners to accomplish in a few seconds what would have taken many minutes to perform by suturing. This reduces blood loss and trauma to the patient.
Conventional surgical fasteners have been in the form of ordinary metal staples, which are bent by the delivery apparatus to hook together body tissue.
Typically, conventional staples comprise a pair of legs joined together at one end by a crown. The crown may be a straight member connecting the legs or may form an apex. Moreover, the legs may extend substantially perpendicular from the crown or at some angle therefrom. Irrespective of the particular configuration, however, conventional staples are designed so that they may be deformed to hold body tissue.
Accordingly, the stapler applicators have conventionally embodied structure functioning to project the conventional staple into tissue as well as to deform the staple so that it is retained against the tissue. Generally speaking, typical applicators include an anvil cooperating with means to eject the conventional staple from the applicator. In some applications, access to the body tissue from two opposite directions is available and the anvil can operate to deform the legs of the staple after they have passed through the body tissue. In applications where access to the tissue is from only one direction, WO 96103925 219 6 9 0 5 pCT~S95/07270 _2_ the anvil may deform the crown of the conventional staple so that its legs will project into the body tissue in a fashion so as to hold the staple against the tissue.
Since conventional staples require deformation and must cooperate with applicators having an anvil or other means to deform the staples, conventional applicators typically comprise complex structures and can be prohibitively expensive.
Conventional applicators must embody structure functioning to not only eject the fasteners but to do so in a manner so that the fastener deforms properly and timely.
In some applications, conventional applicators must be equipped with structure functioning to move the anvil into and out of position so that when the fastener is ejected from the applicator, the anvil is properly positioned and once fastener deformation is complete, moves out of position, thereby allowing the process to be repeated. Moreover, the anvil must be formed into a proper configuration so that fastener deformation can be repeated accurately. Further, the force between the fastener and the anvil must be controlled so that repeated deformation is accomplished. The objectives of many inventions in this field have been to accomplish these goals by the simple manipulation of a single lever. It is to be appreciated, therefore, that the fastener applicators have become complex and expensive instruments.
Two part fasteners have also been conventionally utilized, where a barbed staple is used in conjunction with a retaining piece to hold the staple in place. Typically, the two part staple comprises a crown or backspan and two barbed prongs which are engaged and locked into a separate retainer piece. In use, the staple is pressed into the body tissue so that the barbs penetrate the tissue and emerge from the other side where they are then locked into the retainer piece. Retainers prevent the staple from working loose from the tissue. The two piece fasteners cannot be unlocked and are not removable.
Like other conventional applications, however, the two piece fasteners require the staple delyivery apparatus to have access to both sides of the tissue. Thus, as with the other conventional applications, two piece fasteners are limited since they cannot be used where access to tissue is from one direction only.
In those situations where access to body tissues is limited to one direction, as in grafting procedures, deformable surgical fasteners have been conventionally employed. As mentioned previously, however, the applicators commonly used in these situations embody an anvil cooperating with a fastener to deform it and consequently, tend to be of a complex design.
Some advancements have been made in this area so that applicators functioning to attach grafts to tissue, for instance, are not required to embody an anvil and may, therefore, have a more simple design.
In particular, it has been suggested in the art to employ fasteners with barbs, thereby eliminating the need for deforming the fastener. These fasteners are limited, however, since the path created in the graft and tissue by the barbs as the fastener is pressed into the graft and tissue may allow the fastener to loosen its grip or to entirely back out of engagement.
Moreover, due to their sole reliance upon barbs to retain tissue, the barb fasteners are further limited in that they may not have a great enough retentive surface area for securely holding tissue in place.
To circumvent or overcome the problems and limitations associated with conventional fasteners and applicators, a simple applicator that dispenses a "~., surgical fastener having high surface area for retentive contact with tissue and that can be delivered into body tissue from one direction may be employed. The present invention embodies these characteristics.
SUMMARY OF THE INVENTION
According to a first aspect of the invention, there is provided a fastener for ligating tissue for attaching an implantable device. The fastener includes a continuous helical coil having a distal end, a proximal end and a diameter, the distal end having a first terminal coil and the proximal end having a second terminal coil. The first terminal coil forms a point for piercing tissue, and has a first helical coil section adjacent the distal end. A gap is provided between the point and the first helical coil section. The second terminal coil is configured into a T-bar perpendicularly extending along the diameter of the fastener over less than the entire length of the diameter.
Preferably, the gap is adapted to determine depth of penetration and pitch of the fastener in tissue and retentive strength of the fastener to tissue.
It is preferred that the continuous helical coil has a uniform pitch between coils.
Preferably, the continuous helical coil has a pitch between coils that can be varied.
Preferably, the continuous helical coil has a pitch that can be increased as the fastener is inserted into the tissue.
Preferably, the continuous helical coil is made from absorbable material.

~~~9~5 _5_ In the present embodiment, the continuous helical coil is made from a metallic material selected from the group of materials consisting essentially of titanium, titanium alloys, stainless steel and nickel chrome alloys.
It is preferred that the continuous helical coil is made from a polymeric material selected from the group of materials consisting essentially of plastics, liquid crystal polymers, HDPE, polyglycolic acid and polyglycolid hydroxgacetic acid.
Preferably, the continuous helical coil is longitudinally collapsible and expandable.
Preferably, the fastener includes one or more barbs proj ecting in reverse direction and positioned proximate to the point.
According to another aspect of the invention, there is provided a fastener for ligating tissue or for attaching an implantable device. The fastener includes a continuous double helical coil having a distal end and a proximal end.
The distal end terminates with dual points each for piercing the tissue. The fastener further has dual first helical coil sections adjacent the distal end, each being associated with one of the dual points and each defining a gap therebetween.
The fastener further has a connecting bar at the proximal end for engagement with an applicator for inserting the double helical coil through the tissue to position and attach the implantable device.
Preferably, the gap is adapted to determine depth of penetration and pitch of the fastener in tissue and retentive strength of the fastener to tissue.

'"~- ""' Preferably, the continuous double helical coil has uniform pitch between coils.
Preferably, the continuous double helical coil has a pitch between coils that can be varied by the applicator.
Preferably, the continuous double helical has a pitch that can be increased as the fastener is inserted into the tissue.
In the present embodiment, it is preferred that the continuous double helical coil is made from absorbable material.
Preferably, the continuous double helical coil is made from a metallic material selected from the group of materials consisting essentially of titanium, titanium alloys, stainless steel and nickel chrome alloys.
It is preferred that the continuous double helical coil is made from a polymeric material selected from the group of materials consisting essentially of plastics, liquid crystal polymers, HDPE, polyglycolic acid and polyglycolid hydroxgacetic acid.
Preferably, the continuous double helical coil is longitudinally collapsible and expandable.
In the present embodiment, its is preferred that the fastener includes a pivot post extending from the connecting bar and toward the distal end, the pivot post having a pointed terminal end.
Preferably, the fastener Includes one or more barbs projecting in reverse direction and positioned proximate to the dual points.

According to another aspect of the invention, there is provided a system for ligating tissue or attaching an implantable device. The system includes a continuous helical coil having a distal end, a proximal end, a diameter and a first helical coil section at the distal end. The distal end has a first terminal coil configured to pierce tissue and the proximal end has a second terminal coil configured into a T-bar extending along the diameter over less than the entire length of the diameter for receiving and translating rotational forces. The system further has an applicator for applying rotational forces to the T-bar of the continuous helical coil.
Preferably, the applicator includes a distal portion and a proximal portion, the distal portion having an interior configured to retain a plurality of the continuous helical coils and a distal end configured to sequentially deploy each the continuous helical coil into tissue.
Preferably, the continuous helical coil is longitudinally collapsible and expandable.
Preferably, the first terminal coil of the continuous helical coil is configured with a point.
In the present embodiment, it is preferred that the point of the first helical coil section and an adjacent coil section define a gap, the gap determining the depth of penetration and a pitch of the continuous helical coil in tissue and retentive strength of the continuous helical coil in tissue.
Preferably, the continuous helical coil has a pitch between coils that can be varied by the applicator.
.y r.. -7a-It is preferred that the continuous helical coil includes at least one barb projecting in a reverse direction and positioned proximate to the distal end.
Preferably, the proximal end of the continuous helical coil is configured into a T-bar.
According to another aspect of the invention, there is provided a system for ligating tissue or attaching an implantable device. The system includes a continuous double helical coil having a distal end terminating with a first point and a second point, a proximal end including a connecting bar and a first helical coil section and a second helical coil section. The first and second helical coil sections are adjacent the distal end and are associated with the first and second points and define a gap therebetween. The system further includes an applicator for applying rotational forces to the connecting bar.
It is preferred that the continuous double helical coil is longitudinally collapsible and expandable.
Preferably, the continuous double helical coil has a pitch between coils that can be varied by the applicator.
In the present embodiment, it is preferred that the continuous double helical coil includes at least one barb projecting in a reverse direction and positioned proximate to the first and second points.
Preferably, the continuous double helical coil includes a pivot post extending from the connecting bar and toward the distal end, the pivot post having a pointed tunnel end.
Other features and advantages of the present invention will become apparent from the following detailed description, -7b-taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principals of the invention.

WO 96103925 219 6 9 0 5 pCT~S95107270 BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE 1 depicts a perspective view of a fastener of the present invention, illustrating a side view of a helical fastener.
FIG. lA depicts another perspective view of the fastener of the present invention, illustrating an end view of the helical fastener.
FIG. 1B depicts a schematic view of a fastener of the present invention, illustrating a substantially collapsed helical fastener with a relatively small gap that has been partially inserted into tissue.
FIG. 1C depicts a schematic view of a fastener of the present invention, illustrating the helical fastener depicted in FIG. 1B completely inserted into tissue.
FIG. 1D depicts a schematic view of a fastener of the present invention, illustrating a substantially collapsed helical fastener with a relatively large gap that has been partially inserted into the tissue.
FIG. 1E depicts a schematic view of a fastener of the present invention, illustrating the helical fastener depicted in FIG. 1D completely inserted into tissue.

WO 96!03925 _9_ FIG. 1F depicts a perspective view of another embodiment of the present invention, illustrating an end view of the helical fastener.
FIG. 2 depicts a perspective view of another embodiment of the present invention, illustrating a double helical fastener.
FIG. 2A is a front view of the double helical fastener of FIG. 2.
FIG. 2B is side view of the double helical fastener of FIG. 2.
FIG. 2C is a top view of the double helical fastener of FIG. 2.
FIG. 3 is a perspective view of yet another embodiment of the present invention, illustrating another design of a double helical fastener.
FIG. 3A is a front view of the double helical fastener of FIG. 3.
FIG. 3B is a side view of the double helical fastener of FIG. 3.
FIG. 3C is a top view of the double helical fastener of FIG. 3.
FIG. 4 is a perspective view of the present invention, illustrating a helical fastener with a central post.
FIG. 5 depicts a schematic cross-sectional view of an applicator of the present invention, illustrating a side view of the applicator.

WO 96103925 219 6 9 0 5 PCT~S95107270 -10- °~°
FIG. 6 is a schematic cross-sectional side view of a terminal end of the applicator.
FIG. 6A is a schematic cross-sectional end view of a terminal end of the applicator.
FIG. 7 is a schematic cross-sectional view of the terminal end of the applicator, illustrating the preferred embodiment of the terminal end.
FIG. 7A is a schematic cross-sectional end view of the preferred embodiment of the terminal end of the application shown in FIG. 7.
FIG. 8 is a schematic cross-sectional view of the terminal end of the applicator, illustrating another embodiment of the terminal end.
FIG. 8A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 8.
FIG. 9 is a schematic cross-sectional view of the terminal end of the applicator, illustrating yet another embodiment of the terminal end.
FIG. 9A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 9.
FIG. 10 is a schematic cross-sectional view of the terminal end of the applicator, illustrating still yet another embodiment of the terminal end.
FIG. l0A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. l0.

WO 96!03925 219 6 9 0 5 pCT~S95/07270 FIG. I1 is a schematic cross-sectional view of the terminal end of the applicator, illustrating another embodiment of the terminal end.
FIG. 11A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 11.
FIG. 12 is a schematic cross-sectional view of the terminal end of the applicator, illustrating a further embodiment of the terminal end.
FIG. 12A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 12.
FIG. 13 is a schematic cross-sectional view of the terminal end of the applicator, illustrating a still further embodiment of the terminal end.
FIG. 14 is a schematic cross-sectional view of the terminal end of the applicator, illustrating still yet another embodiment of the terminal end.
FIG. 15. is a schematic cross-sectional view of another applicator of the present invention, illustrating a side view of the applicator.
FIG. 16 is a schematic partial cross-sectional view of a releasable connection between the lead screw and rotator.
FIG. 16A is schematic representation of a distal end of the lead screw, illustrating an end view of the lead screw.

FIG. 16B is a schematic representation of the distal end of the lead screw, illustrating a side view of the lead screw depicted in FIG. 16.
FIG. 16C is a schematic representation of the proximal end of the rotator, illustrating a side view of the rotator.
FIG. 16D is a schematic representation of the proximal end of the rotator, illustrating an end view of the rotator depicted in FIG. 16B.

DETAILED DESCRIPTIONrOF THE.PREFERREDEMBODIMENTS
As is shown in the drawings, which are included for purposes of illustration and not by way of limitation, the invention is embodied in a continuous helical fastener and an applicator therefor. The helical fastener has a high retentive surface area and the applicator has a simple design and functions to dispense the helical fasteners, without substantially deforming the fasteners, into body tissue, access to which is from one direction only. Some conventional fasteners require deformation to hold tissue and are consequently limited since they require complex applicators to attach them into tissue. Other conventional fasteners lack high retentive surface area for securely holding tissue. Still other fastener/applicator systems require access to tissue from two directions in order to accomplish attaching a fastener to tissue. Thus, the helical fastener and applicator of the present invention provides a superior means to attach fasteners to tissue.
One embodiment of the present invention (FIGS. 1, lA and 5) is embodied in a helical fastener 10 which is attached to tissue by employing a novel applicator 12 which rotates the fastener 10 into tissue. The dimensions and physical characteristics of the helical fastener 10 are selected to insure a secure attachment of the fastener l0 ~o tissue. Similarly, WO 96/03925 ~ 219 6 9 0 5 p~~s95/07270 the dimensions and physical characteristics of the applicator 12 utilized to dispense the fasteners 10 into tissue are dependent upon the application.
In a preferred embodiment, the fastener 10 is p formed into the configuration of a continuous helix and may have a depth 16, a diameter 18 and a pitch 20 determined by the application. The continuous helix may be longitudinally collapsible and expandable. The cross-sectional profile of the continuous helix is substantially circular in the preferred embodiment but can be square, rectangular or triangular. In a particular application such as mesh anchoring for hernia repair, the pre-formed pitch can be .050 inches.
However, the pre-formed pitch can vary from 0 to a maximum of approximately 3.0 times the coil diameter.
In other embodiments, it is contemplated that the pitch vary along the length of the fastener 10 so as to optimize the retaining force of the fastener 10.
Moreover, since the continuous helical coil is 20 preferably longitudinally collapsible and expandable, upon insertion into tissue, the final pitch 31 may be less than or greater than the pre-formed pitch. If the coil is made of rigid construction, as is also contemplated, pitch would be made substantially fixed.
The diameter in the preferred embodiment may be 5 mm;
however, designs ranging from 1 mm and up are contemplated. In practice, the depth 16 of the fastener 10 must be selected so that the extent of ,- -15-fastener penetration intp tissue is sufficient to hold the fastener 10 in place.
Moreover, distal end 22 of the fastener 10 is to be configured such that a gap 23 exists between the most distal coil 27 (or first coil) of the fastener 10 and its adjacent coil. As may be appreciated from the preferred embodiment of FIGS. iB through lE, as the fastener 10 is pressed against tissue 25, all of the coils substantially collapse except the most distal coil 27, leaving the gap 23 to determine the path the fastener 10 takes as it is rotated into the tissue 25 and more importantly, the extent of penetration 29 into the tissue 25 and final pitch 31 of the fastener 10 in tissue. Although FIG. 1B shows substantially all of the coils being collapsed, it is to be appreciated that, depending upon the applicator utilized to implant the fastener 10, fewer coils than all of the coils may be collapsed at any one time. It remains, however, that since the fastener 10 is longitudinally collapsible and expandable, it is the gap 23 that generally determines final pitch 31. Accordingly, the magnitude of the gap 23 can be varied, depending upon the application, to achieve the desired final pitch 31 and penetration 29 in tissue. Thus, the greater the gap 23, upon insertion of the fastener 10 in tissue, the greater the penetration 29 and final pitch 31 of the fastener 10 in tissue.

219 6 9 0 5 pCT~S95107270 -16- ~~
In the preferred embodiment, the distal end 22 of the helical fastener 10 terminates with a point 24. The point 24 may be sharp or blunt~depending upon the tissue to which the fastener 10 will be affixed.
Additionally, one or more barbs or a sharp point projecting in reverse direction to point 24 (not shown) can be added to fastener 10 near point 24 to enhance anchoring characteristics of the fastener. A
proximal end 26 of the helical fastener 10 may comprise structure functioning to receive and transmit applied longitudinal forces. In the preferred embodiment, the most proximal coil is formed into a T-bar 33 that perpendicularly sections the diameter 18 of the fastener 10. In alternate embodiments, it is also contemplated that the most proximal coil section the diameter 18 non-perpendicularly or be formed into a spiral 35 existing in a single plane (See FIG. 1F).
Concerning the material of the helical fastener 10, it is contemplated in the preferred embodiment that the fastener be made from semi-stiff implantable wire, such as titanium, wound into a helical shape. In alternate embodiments, the helical fastener 10 may comprise plastic or absorbable materials. Examples of materials that can be used in constructing the helical fastener 10 include titanium, titanium alloys, stainless steel, nickel, chrome alloys and any other biocompatible implantable metals. Other options for materials are liquid crystal polymers, 219 6 9 0 5 p~~g95/07270 HDPE, polyglycolic acid,; and polyglycolid hydroxgacetic acid. Further, it may also be desirable to coat the fastener, or a portion thereof, with a biocompatible lubricious material that provides for easier delivery of the fastener into tissue.
In another embodiment of the surgical fastener, the fastener 110 is formed into the configuration of a double helix (See FIGS. 2-2C). By embodying a double helix, the fastener 110 has increased retentive strength as well as means to balance the fastener 110 as it is pressed into tissue.
As with the helical fastener 10, the configuration of the double helical fastener 110, i.e., the pre-formed pitch and diameter, may be varied for a particular application and a barb may be employed to enhance anchoring in tissue. Moreover, the materials contemplated are the same as those for the helical fasteners. Further, the double helical fastener 110 is also longitudinally collapsible and expandable and its final pitch is dependent upon the gap 112 existing between the most distal coils 114, 115 of the fastener 110 and their adjacent coils.
Regarding the proximal 118 and distal 120 ends of the double helical fastener 110, they comprise structure to drive the fastener into tissue as well as tissue piercing structures. The proximal end 118 has a connector bar 122 sectioning the diameter of the fastener that connects one helical coil to another and WO 96/03925 219 6 9 0 5 POT~s95/07270 functions to receive and; transmit longitudinal forces.
The distal end 120 terminates with two points 124, 125 for piercing and facilitating the implantation of the fastener 110 into tissue.
As may be appreciated by comparing FIGS. 2-2D
with FIGS. 3-3D, it is contemplated that the double helical fastener 110 have a full turn design (FIGS. 2-2D) as well as a half turn design (FIGS. 3-3D). It is to be understood, however, that the designs having more than one turn and having other increments of turns are contemplated. It is the applicator that will determine the required number of turns for a specific fastener 110.
In yet another embodiment of the surgical fastener, as shown in FIG. 4, the double helical fastener 110 is provided with a pivot post 130 having a pointed terminal end 132. The pivot post 130 of this embodiment operates to provide the fastener 110 with a stabilizing element so that, as the fastener 110 is being turned, the helical coils cooperatively enter the tissue.
The applicator 12 (FIG. 5) comprises a proximal portion 28 having a handle 30 and an actuator 32 and a cooperating elongated distal portion or cannula 34 housing a plurality of fasteners. In general, through the manipulation of the actuator 32, the fasteners are ejected, one by one, out of a distal portion 34 and into body tissue. The applicator 12, 219 6 9 0 5 pCT~S95107270 hereinafter described in;more detail, is equally proficient in driving each of the embodiments of fasteners set forth above into tissue.
In more detail (see FIGS. 6 and 6A), the distal portion 34 comprises an outer tube 36 housing a rotator 38, a lock/clip indicator 40 and a load spring 42. Extending longitudinally along the rotator 38 is a groove 44 which operates to receive the most proximal coil sectioning the fastener. Although FIG. 6 shows only a single fastener (having a single helical design) retained by the rotator 38, it is to be appreciated that the rotator 38 may receive a plurality of fasteners (having a single or double helical design), wherein each fastener has its last coil positioned within the rotator groove 44. Moreover, although not depicted in FIG. 3, it is also contemplated that rather than embodying a groove, the rotator 38 has a cross-sectional profile approximately a "D", wherein the flat portion operates to engage the coil sectioning the fasteners. Irrespective of the configuration of the rotator, however, the rotator is to embody structure functioning to engage a plurality of fasteners and to facilitate turning them into tissue.
It is also to be appreciated that load spring 42 applies a force through the lock clip indicator 40 to bias the plurality of fasteners distally. The lock clip/indicator 40 may comprise a simple washer sized and shaped to engage the fasteners and rotator 38 as W O 96103925 ~ ~ 9 6 9 0 5 well as to receive forces from the load spring 42.
Additionally, lock/clip indicator 40 serves as a jam stop to prevent further actuation by rotator 38 upon discharge of all fasteners by mating with, or abutting against, structure comprising the terminal end 50 and preventing further rotation. Lock/indicator 40 can be made of a color (or shape) to serve as an empty indicator notifying the user that no more fasteners are available. Other embodiments of the indicator 40 may be utilized as long as they function to transmit forces to bias the fasteners distally. The load spring 42 is to be retained within the outer tube 36 and to have physical characteristics such that sufficient forces may be applied through a front end 43 to a last remaining fastener contained within the applicator 12.
A back end (not shown) of the load spring 42 may be placed against any stationery structure within the outer tube 36, thereby providing a foundation against which the spring 42 may be compressed. In a preferred embodiment, the load spring 42 extends substantially the length of the distal portion 34.
In the preferred embodiment (FIGS. 7 and 7A), the outer tube 36 is configured with a thread form 201 comprising an interlock spring 203 fixedly retained within the outer tube 36 and extending substantially the length thereof. The interlock spring 203 may be fixedly retained within the outer tube 36 by ensuring a tight interference between the parts or the interlock WO 96103925 219 6 9 0 5 p~T~s95/07270 spring may be spot welded or equivalently bonded within the outer tube. The thread form 201 operates to guide the fasteners through the distal portion 34 and to eject them from the applicator 12.
In another embodiment of the applicator 12 (FIGS. 8 and 8A), attached at a terminal end 46 of the distal portion 34 may be a nose piece 48. The nose piece 48 may further comprise a protrusion 50 extending perpendicularly and towards a longitudinal axis 52 of the distal portion 34. This nose piece protrusion 50 also functions to engage the surgical fasteners and to force them from the terminal end 46 of the distal portion 34 as well as engaging lock/clip indicator 40 as described above.
In other embodiments of the applicator 12, the distal portion embodies other structure or thread forms functioning to engage the surgical fasteners and guide them out of the applicator and into tissue (See FIGS. 9-14). In FIGS. 9 and 9A, the outer tube 36 is rolled at its terminal end 46 and a 180° portion of the rolled terminal end is cut away. The remaining rolled portion engages the fastener while the portion cut away provides an exit for the fasteners. The embodiment depicted in FIGS. 10 and l0A is similar to that of FIGS. 9 and 9A, the difference being that instead of removing a portion of the rolled terminal end 46, it is stamped or deformed to thereby provide an exit. FIGS.
11 and 11A show yet another embodiment, wherein two 219 6 9 0 5 p~'~1595/07270 longitudinally spaced aprart stabilizing points 301, 302 are formed 180° from each other within the outer tube.
These stabilizing points also operate to engage the fastener and guide it into tissue. Turning to FIGS.
12, 12A, 13 and 14, they each comprise a terminal end 46 formed with threads which operate to engage and eject a fastener. In FIGS. 12 and 12A are depicted threads machined or formed solely within the inside of the outer tube. FIG. 13 shows an internally threaded sleeve attached to the outside of the terminal end 46 of the outer tube 36. FIG. 14 illustrates an applicator 12 provided with a terminal end 46 deformed so as to have internal and external threaded structures. Irrespective of the design chosen for the terminal end of the applicator, however, each of the designs are effective with a relatively small overall outer diameter, i.e., on the order of 5mm.
In order to eject surgical fasteners from the distal portion 34, the actuator 32 functions to turn the rotator 38. As the rotator turns, the distal end 22 of a fastener is threaded out of the terminal end 46 of the applicator 12 (see FIG. 5).
In the preferred embodiment of the proximal portion 28 of the applicator 12 (See FIG.5), a lever 54 is pivotally connected about a midpoint 56 to the handle 30. A first end 58 of the lever 54 is to be configured for gripping by hand. A second end 60 of the lever is to be adapted to pivotally engage a nut driver 62.
The nut driver 62 of the applicator 12 travels upon a high helix lead screw 64 which is rotatably mounted within the proximal portion 28. In the preferred embodiment, a longitudinal axis of the high helix lead screw 64 is coaxial with the longitudinal axis 52 extending through the distal portion 34 of the applicator 12. Upon manipulation of the lever 54, the nut driver 62 travels along the lead screw 64 causing it to rotate through a connection of the lead screw 64 to the rotator 38, the action of the lead screw causes the rotator to rotate. The lead screw 64 may be connected to the rotator 38 by any conventional means. For instance, the lead screw 64 can have an internal bore receiving and engaging an end of the rotator 38. Further, the length of travel of the nut driver 62 along the lead screw 64 is chosen such that it causes the rotator to rotate a predetermined number of times so that a single helical fastener 10 is ejected from the applicator 12.
Additionally, in the preferred embodiment, the lever further comprises a midsection extension 66.
Pivotally attached to the midsection extension 66 of the lever 54 is contemplated to be a spring loaded pawl 68 adapted to releasably engage gear teeth 70 formed in the interior of the handle 30. Spring loaded pawl 68 is configured to prohibit the~lever 54 from 219 6 9 0 5 pCT~S95/07270 W O 96!03925 ' -2 4 - """"
backstroking until it hays been completely depressed.
Upon complete depression of the lever 54, the pawl 68 clears the gear teeth 70 and the spring biasing the pawl 68 rotates the pawl 68 away from the teeth 70, thereby allowing the lever 54 to return to its undepressed condition.
In operation, upon complete depression of the lever 54, the nut driver 62 travels a pre-determined distance along the lead screw 64, causing the rotator 38 to rotate a pre-determined number of revolutions corresponding to a number of turns of a particular helical fastener 10. As the rotator 38 rotates, the fasteners retained by the rotator also rotate and the coils of the most distal fastener are threaded out of the terminal end 46 of the applicator 12 and into tissue. Moreover, where the lever 54 is only partially depressed, the spring loaded pawl 68 operates to hold the lever 54 stationery and will continue to function to hold the lever 54 stationery until the lever 54 has been completely depressed. In this way, the delivery of fasteners into body tissue is controlled so that only a single fastener may be completely ejected out of the applicator 12 and pressed into body tissue at a time.
In the preferred embodiment, the proximal portion 28 is fabricated to have a reusable handle that can be re-sterilized, and the distal portion is made disposable. Thus, upon discharge of all the fasteners WO 96/03925 219 6 9 0 5 pCT~S95/07270 from distal portion 34, the distal portion would be discarded and replaced. The handle could be reused up to a limited number of procedures.
In another embodiment of the proximal portion 5 328, of the applicator 312 (FIG. 15), a lever 354 is pivotally connected at a first end 355 to the handle 330 and biased to its undepressed position by a spring 357. The mid-section 358 of the lower 354 is configured for gripping by hand. A second end 360 of 10 the lever is to be adapted to pivotally engage a nut drive 362.
The nut driver 362 of the applicator 312 travels along a high helix lead screw 364 which is rotatably mounted within the proximal portion 328.
Upon manipulation of the lever 354, the nut driver travels along the lead screw 364 causing it to rotate and, through a clutch assembly or a releasable connection of the lead screw 364 to the rotator 38, the action of the lead screw causes the rotator to rotate.
Further, the lever 354, has a mid-section extension 366 that cooperates with a spring biased latch pawl mechanism 368 fixed to the handle adapted to releasably engage teeth 370 formed on the mid-section extension 366. The spring biased latch pawl is configured to prohibit the lever 354 from backstroking until it has been completely depressed. Upon complete depression of the lever 354, the latch pawl 368 clears the mid-section teeth 370 and the spring biased latch pawl 368 rotates away from the teeth, thereby allowing the lever 354 to return to its undepressed condition.
As stated, there is a releasable connection between the lead screw 364 and the rotator. The releasable connection provides the applicator with means to disengage the distal portion of the applicator from the proximal portion. In this way, the proximal portion can be re-used with various different designs of the proximal portion. Further, while the lever 354 is being depressed, the clutch assembly or releasable connection functions to transfer the rotation of the lead screw 364 to the rotator 38, thereby causing the rotator to rotate. Additionally, upon complete depression of the lever, the clutch assembly operates to allow relative motion of the lead screw 364 and the rotator.
One such releasable connection contemplated is a conventional ratchet mechanism. As shown in FIGS.
16-16D, the distal end 370 of the lead screw 364 has a connecting surface 372 equipped with leaf springs 374, 376 each having an engaging face 377 and an internal bore 378 existing coaxially with a longitudinal axis of the lead screw. The proximal end 380 of the rotator 38 has a cooperating connecting surface 382 having ridges 384 for releasable engagement with the leaf springs 374, 376 and an extension 386 adapted to fit within the internal bore of the lead screw connecting surface. As may be appreciated from the FIGS., as the lead screw WO 96/03925 219 6 9 0 5 p~'~595/07270 ~.-. -2 7 -turns so that the ridges;384 contact the engaging faces 377 of the leaf springs 374, 376, the rotation of the lead screw 364 will cause the rotator 38 to likewise rotate. Where the lead screw is turned in the opposite direction, the ridges 384 will not engage the engaging face of the leaf springs and the motion of the lead screw 384 will not be transferred to the rotator 38.
In this embodiment, upon complete depression of the lever 354, the nut driver 362 travels a pre-determined distance along the lead screw 364, causing the rotator 38 to rotate a pre-determined number of revolutions. As the rotator 38 rotates, the fasteners retained by the rotator also rotate and the coils of the most distal fasteners are threaded out of the applicator and into the tissue. At this point, the latch pawl mechanism 368 disengages from the teeth 370 and the lever 354 is returned to its undepressed position by spring 357. As with the previous embodiment of the proximal portion 28, the proximal portion of this embodiment functions to allow only a single fastener to be completely ejected from the applicator and be pressed into body tissue at a time.
In other embodiments, means to cause the rotator to rotate may comprise a single knob connected to a rotator which can be turned by hand.
Additionally, the revolving means may include a rack and gear structure or a set of beveled gears. Further, instead of comprising a groove, the rotator may be _28_ ...~.
internally threaded, wherein the threaded portions function to house as well as advance the helical fasteners 10. Irrespective of the means or structure employed, however, it is contemplated that the number of revolutions of the rotator be set to a pre-determined parameter so that the delivery of helical fasteners to tissue may be controlled.
From the foregoing, it will be appreciated that the helical fastener in applicator of the present invention functions to securely attach a fastener with high retentive surface area to tissue from one direction through the utilization of an applicator having a simple design. It is also to be appreciated that the present invention may be utilized in a number of applications including ligating tissue, hernia mesh repair, bladder neck suspension, and in conjunction with implant drug delivery systems or procedures involving positioning of surgical or implantable devices in patient.
While several particular forms of the invention have been illustrated and described, it will also be apparent that various modifications can be made without departing from the spirit and scope of the invention.
Thus, it should be understood that various changes in form, detail and application of the present invention may be made without departing from the spirit and scope of this invention.

Claims (34)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A fastener for ligating tissue or for attaching an implantable device, the fastener comprising:
a continuous helical coil having a distal end, a proximal end and a diameter, said distal end having a first terminal coil and said proximal end having a second terminal coil;
said first terminal coil forming a point for piercing tissue;
said first terminal coil having a first helical coil section adjacent said distal end wherein there is a gap between said point and said first helical coil section; and said second terminal coil configured into a T-bar, said T-bar perpendicularly extending along said diameter of the fastener over less than the entire length of the diameter.
2. The fastener of claim 1, wherein said gap is adapted to determine depth of penetration and pitch of the fastener in tissue and retentive strength of the fastener to tissue.
3. The fastener of claim 1, wherein said continuous helical coil has a uniform pitch between coils.
4. The fastener of claim 1, wherein said continuous helical coil has a pitch between coils that can be varied.
5. The fastener of claim 1, wherein said continuous helical coil has a pitch that can be increased as the fastener is inserted into the tissue.
6. The fastener of claim 1, wherein said continuous helical coil is made from absorbable material.
7. The fastener of claim 1, wherein said continuous helical coil is made from a metallic material selected from the group of materials consisting essentially of titanium, titanium alloys, stainless steel and nickel chrome alloys.
8. The fastener of claim 1, wherein said continuous helical coil is made from a polymeric material selected from the group of materials consisting essentially of plastics, liquid crystal polymers, HDPE, polyglycolic acid and polyglycolid hydroxgacetic acid.
9. The fastener of claim 1, wherein said continuous helical coil is longitudinally collapsible and expandable.
10. The fastener of claim l, further comprising one or more barbs projecting in reverse direction and positioned proximate to said point.
11. A fastener for ligating tissue or for attaching an implantable device, the fastener comprising:
a continuous double helical coil having a distal end and a proximal end;
said distal end terminating with dual points each for piercing the tissue;
dual first helical coil sections adjacent said distal end each being associated with one of said dual points and each defining a gap therebetween; and a connecting bar at said proximal end for engagement with an applicator for inserting said double helical coil through the tissue to position and attach the implantable device.
12. The fastener of claim 11, wherein said gap is adapted to determine depth of penetration and pitch of the fastener in tissue and retentive strength of the fastener to tissue.
13. The fastener of claim 11, wherein said continuous double helical coil has uniform pitch between coils.
14. The fastener of claim 11, wherein said continuous double helical coil has a pitch between coils that can be varied by the applicator.
15. The fastener of claim 11, wherein said continuous double helical has a pitch that can be increased as the fastener is inserted into the tissue.
16. The fastener of claim 11, where said continuous double helical coil is made from absorbable material.
17. The fastener of claim 11, wherein said continuous double helical coil is made from a metallic material selected from the group of materials consisting essentially of titanium, titanium alloys, stainless steel and nickel chrome alloys.
18. The fastener of claim 11, wherein said continuous double helical coil is made from a polymeric material selected from the group of materials consisting essentially of plastics, liquid crystal polymers, HDPE, polyglycolic acid and polyglycolid hydroxgacetic acid.
19. The fastener of claim 11, wherein said continuous double helical coil is longitudinally collapsible and expandable.
20. The fastener of claim 11, further comprising a pivot post extending from said connecting bar and toward said distal end, said pivot post having a pointed terminal end.
21. The fastener of claim 11, further comprising one or more barbs projecting in reverse direction and positioned proximate to said dual points.
22. A system for ligating tissue or attaching an implantable device, the system comprising:
a continuous helical coil having a distal end, a proximal end, a diameter and a first helical coil section at said distal end, said distal end having a first terminal coil configured to pierce tissue and said proximal end having a second terminal coil configured into a T-bar extending along said diameter over less than the entire length of said diameter for receiving and translating rotational forces; and an applicator for applying rotational forces to said T-bar of said continuous helical coil.
23. The system of claim 22, wherein said applicator includes a distal portion and a proximal portion, said distal portion having an interior configured to retain a plurality of said continuous helical coils and a distal end configured to sequentially deploy each said continuous helical coil into tissue.
24. The system of claim 22, wherein said continuous helical coil is longitudinally collapsible and expandable.
25. The system of claim 24, wherein said first terminal coil of said continuous helical coil is configured with a point.
26. The system of claim 25, wherein said point of said first helical coil section and an adjacent coil section define a gap, said gap determining the depth of penetration and a pitch of said continuous helical coil in tissue and retentive strength of said continuous helical coil in tissue.
27. The system of claim 24, wherein said continuous helical coil has a pitch between coils that can be varied by said applicator.
28. The system of claim 22, wherein said continuous helical coil includes at least one barb projecting in a reverse direction and positioned proximate to said distal end.
29. The system of claim 22, wherein said proximal end of said continuous helical coil is configured into a T-bar.
30. A system for ligating tissue or attaching an implantable device, the system comprising:
a continuous double helical coil having a distal end terminating with a first point and a second point, a proximal end including a connecting bar and a first helical coil section and a second helical coil section, said first and second helical coil sections being adjacent said distal end and being associated with said first and second points and further defining a gap therebetween; and an applicator for applying rotational forces to said connecting bar.
31. The system of claim 30, wherein said continuous double helical coil is longitudinally collapsible and expandable.
32. The system of claim 30, wherein said continuous double helical coil has a pitch between coils that can be varied by said applicator.
33. The system of claim 30, wherein said continuous double helical coil includes at least one barb projecting in a reverse direction and positioned proximate to said first and second points.
34. The system of claim 30, wherein said continuous double helical coil includes a pivot post extending from said connecting bar and toward said distal end, said pivot post having a pointed tunnel end.
CA002196905A 1994-08-05 1995-06-07 Surgical helical fastener with applicator Expired - Lifetime CA2196905C (en)

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US08/286,878 US5582616A (en) 1994-08-05 1994-08-05 Surgical helical fastener with applicator
PCT/US1995/007270 WO1996003925A1 (en) 1994-08-05 1995-06-07 Surgical helical fastener with applicator

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