WO1999018865B1 - Precision depth guided instruments for use in vertebroplasty - Google Patents

Precision depth guided instruments for use in vertebroplasty

Info

Publication number
WO1999018865B1
WO1999018865B1 PCT/US1998/021572 US9821572W WO9918865B1 WO 1999018865 B1 WO1999018865 B1 WO 1999018865B1 US 9821572 W US9821572 W US 9821572W WO 9918865 B1 WO9918865 B1 WO 9918865B1
Authority
WO
WIPO (PCT)
Prior art keywords
cannula
stylet
elongated
tube
rod
Prior art date
Application number
PCT/US1998/021572
Other languages
French (fr)
Other versions
WO1999018865A1 (en
Inventor
Howard Preissman
Mary E Jensen
Jacques E Dion
Original Assignee
Parallax Medical Inc
Howard Preissman
Mary E Jensen
Jacques E Dion
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
Application filed by Parallax Medical Inc, Howard Preissman, Mary E Jensen, Jacques E Dion filed Critical Parallax Medical Inc
Priority to AU10815/99A priority Critical patent/AU1081599A/en
Publication of WO1999018865A1 publication Critical patent/WO1999018865A1/en
Publication of WO1999018865B1 publication Critical patent/WO1999018865B1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers
    • A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
    • A61B17/8811—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it characterised by the introducer tip, i.e. the part inserted into or onto the bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3472—Trocars; Puncturing needles for bones, e.g. intraosseus injections
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3403—Needle locating or guiding means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
    • A61B17/3496—Protecting sleeves or inner probes; Retractable tips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/061—Measuring instruments not otherwise provided for for measuring dimensions, e.g. length
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/062—Measuring instruments not otherwise provided for penetration depth

Abstract

Precision depth guided instruments are provided for use in performing percutaneous implantation of hard tissue implant materials. A depth guided stylet include a point adapted for piercing hard tissue, self-tapping threads for self-tapping into hard tissue, and, optionally, a second set of threads for meshing with threads within an overfitting cannula. The stylet may include an elongated rod having a first section having a first diameter, and a second section having a second diameter larger than the first diameter. A cannula for use with a depth guided stylet includes an elongated tube having first and second open ends adapted for a depth guided stylet to pass therethrough. The cannula may include threads along at least a portion of an interior circumference of the elongated tube, which are adapted to mate with threads on an exterior circumference of the depth guided stylet. Alternatively, a set of intersecting grooves may be included in the handle of the cannula to mate with a protrusion on the handle of the stylet. A method of using the instruments is also disclosed, as is a kit which includes the instruments and which is used to open a pathway into hard tissue.

Claims

AMENDED CLAIMS[received by the International Bureau on 13 April 1999 (13.04.99); original claims 1-20 replaced by amended claims 1-16 (7 pages)]
1. A depth guided stylet comprising: an elongated rod having first and second ends and a longitudinal axis, said first end terminating in a point adapted for piercing hard tissue; self-tapping threads extending from said point along said elongated rod for a predetermined distance, said self-tapping threads adapted to self-tap into hard tissue; and
a second set of threads provided on said elongated rod in a location between said self-taping threads and said handle, wherein said elongated rod comprises a first section having a first diameter, and a second section having a second diameter larger than said first diameter; wherein said self-tapping threads are provided on said first section, and said second set of threads are provided on said second section; and wherein said second set of threads are adapted to mate with a set of threads within a cannula that fits over said elongated rod.
2. A cannula for use with a depth guided stylet, said cannula comprising: an elongated tube having first and second ends, said first and second ends being open and adapted for a depth guided stylet to pass therethrough as well as to pass said elongated tube over the depth guided stylet, said first end adapted to closely contour the depth guided stylet to ease penetration of said cannula through tissues as said cannula passes over the depth guided stylet;
a handle attached to said second end of said elongated tube; and a set of intersecting grooves in said handle, said set of intersecting grooves including at least a pair of intersecting grooves having different depths: said grooves adapted to fit over a protrusion on a handle of the depth guided instrument to set the position of said cannula at a predetermined location along the depth guided stylet.
24
3. The cannula of claim 2, wherein said means for positioning comprise threads along at least a portion of an interior circumference of said elongated tube, said threads adapted to mate with threads on an exterior circumference of the depth guided stylet.
4. A kit adapted to open a pathway into hard tissue, comprising: a depth guided stylet comprising: an elongated rod having first and second ends and a longitudinal axis, said first end terminating in a point adapted for piercing hard tissue; a first positioning element on a predetermined location of said stylet; and self-tapping threads extending from said point along said elongated rod for a predetermined distance, said self-tapping threads adapted to self-tap into hard tissue; and a cannula comprising: an elongated tube having first and second ends, said first and second ends being open and adapted for said depth guided stylet to pass therethrough as well as to allow said elongated tube to pass over said depth guided stylet, said first end having an inside diameter that is only slightly larger than an outer diameter of said elongated rod to ease a penetration of said cannula, through soft tissues and into the hard tissue during movement along said elongated rod toward said first end; a second positioning element on a predetermined location of said cannula, said second positioning element adapted to interact with said first positioning element to define a position of said cannula with respect to said stylet; and
a handle provided on said second end of said elongated tube; wherein said first positioning element comprises a protrusion on said handle of said stylet and said second positioning element comprises a set of intersecting grooves in said handle of said cannula, said set of intersecting grooves including at least a pair of intersecting grooves having different depths; said grooves adapted to fit over said
25 protrusion and set the position of said cannula at a predetermined location along said depth guided stylet.
5. The kit of claim 4, wherein said connector comprise a Luer lock fitting.
6. The kit of claim 4, wherein said elongated tube comprises a first section having a first diameter, and a second section having a second diameter larger than said first diameter; and wherein said first section is closer than said second section to said first end of said elongated tube.
7. The kit of claim 4, wherein said elongated tube comprises a first tube section having a first tube diameter, and a second tube section having a second tube diameter larger than said first tube diameter; said first tube section being closer than said second tube section to said first end of said elongated tube; and wherein said elongated rod comprises a first rod section having a first rod diameter, and a second rod section having a second rod diameter larger than said first rod diameter; said self-tapping threads being provided on said first rod section.
8. The cannula of claim 2, said first end being beveled.
9. The kit of claim 4, wherein said first end of said elongated tube is beveled to ease the penetration of said cannula through soft and hard tissues.
10. A kit adapted to open a pathway into hard tissue, comprising: a depth guided stylet comprising: an elongated rod having first and second ends and a longitudinal axis, said first end terminating in a point adapted for piercing hard tissue; a first positioning element on a predetermined location of said stylet;
26 self-tapping threads extending from said point along said elongated rod for a predetermined distance, said self-tapping threads adapted to self-tap into hard tissue; and a handle, at least a portion of which radially extends beyond an outer circumference of said elongated rod, thereby providing a mechanical advantage to a user in rotating said elongated rod about said longitudinal axis; and a cannula comprising: an elongated tube having first and second ends, said first and second ends being open and adapted for said depth guided stylet to pass therethrough; a second positioning element on a predetermined location of said cannula, said second positioning element adapted to interact with said first positioning element to define a position of said cannula with respect to said stylet; and a handle, at least a portion of which radially extends beyond an outer circumference of said elongated tube, thereby providing a mechanical advantage to a user in rotating said elongated tube about a longitudinal axis thereof.
1 1. The depth guided stylet of claim 1 , further comprising a handle, at least a portion of which radially extends beyond an outer circumference of said elongated rod, provided on said second end for providing a mechanical advantage to a user in rotating said elongated rod about said longitudinal axis.
12. A kit adapted to open a pathway into hard tissue, comprising: a depth guided stylet comprising: an elongated rod having first and second ends and a longitudinal axis, said first end terminating in a point adapted for piercing hard tissue; a first positioning element on a predetermined location of said stylet; self-tapping threads extending from said point along said elongated rod for a predetermined distance, said self-tapping threads adapted to self-tap into hard tissue; and a handle provided on said second end for providing a mechanical advantage to a user in rotating said elongated rod about said longitudinal axis; and
27 a cannula comprising: an elongated tube having first and second ends, said first and second ends being open and adapted for said depth guided stylet to pass therethrough as well as to allow said elongated tube to pass over said depth guided stylet, said first end having an inside diameter is only slightly larger than an outer diameter of said elongated rod to ease a penetration of said cannula, through soft tissues and into the hard tissue during movement along said elongated rod toward said first end; a second positioning element on a predetermined location of said cannula, said second positioning element adapted to interact with said first positioning element to define a position of said cannula with respect to said stylet; and a handle provided on said second end of said elongated tube; and a connector on said handle of said cannula for connecting said cannula to tubing following removal of said stylet from within said cannula, wherein said connector comprises a Luer lock fitting.
13. A kit adapted to open a pathway into hard tissue, comprising: a depth guided stylet comprising: an elongated rod having first and second ends and a longitudinal axis, said first end terminating in a point adapted for piercing hard tissue; a first positioning element on a predetermined location of said stylet; and self-tapping threads extending from said point along said elongated rod for a predetermined distance, said self-tapping threads adapted to self-tap into hard tissue; wherein said elongated rod further comprises a first rod section having a first rod diameter, and a second rod section having a second rod diameter larger than said first rod diameter; said self-tapping threads being provided on said first rod section; and a cannula comprising:
28 an elongated tube having first and second ends, said first and second ends being open and adapted for said depth guided stylet to pass therethrough as well as to allow said elongated tube to pass over said depth guided stylet, said first end having an inside diameter is only slightly larger than an outer diameter of said elongated rod to ease a penetration of said cannula, through soft tissues and into the hard tissue during movement along said elongated rod toward said first end, wherein said elongated tube further comprises a first tube section having a first tube diameter, and a second tube section having a second tube diameter larger than said first tube diameter; said first tube section being closer than said second tube section to said first end of said elongated tube; and a second positioning element on a predetermined location of said cannula, said second positioning element adapted to interact with said first positioning element to define a position of said cannula with respect to said stylet; wherein said first positioning element comprises a second set of threads provided on said elongated rod in a location between said self-tapping threads and said second end of said elongated rod on said second rod section, and said second positioning element comprises cannula threads along at least a portion of an interior circumference of said elongated tube on said second tube section, said cannula threads adapted to mate with said second set of threads.
14. A cannula for use with a depth guided stylet, said cannula comprising: an elongated tube having first and second ends, said first and second ends being open and adapted for a depth guided stylet to pass therethrough as well as to pass said elongated tube over the depth guided stylet, said first end adapted to closely contour the depth guided stylet to ease penetration of said cannula through tissues as said cannula passes over the depth guided stylet; a handle attached to said second end of said elongated tube; and
29 means for positioning said elongated tube with respect to the depth guided stylet, said means for positioning located on said handle.
15. A cannula for use with a depth guided stylet, said cannula comprising: an elongated tube having first and second ends, said first and second ends being open and adapted for a depth guided stylet to pass therethrough as well as to pass said elongated tube over the depth guided stylet, said first end adapted to closely contour the depth guided stylet to ease penetration of said cannula through tissues as said cannula passes over the depth guided stylet, said elongated tube comprising a first section having a first diameter, and a second section having a second diameter larger than said first diameter; and means for positioning said elongated tube with respect to the depth guided stylet.
16. The cannula of claim 15, further comprising a handle attached to said second end of said elongated tube.
30
PCT/US1998/021572 1997-10-14 1998-10-13 Precision depth guided instruments for use in vertebroplasty WO1999018865A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU10815/99A AU1081599A (en) 1997-10-14 1998-10-13 Precision depth guided instruments for use in vertebroplasty

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/950,382 1997-10-14
US08/950,382 US6019776A (en) 1997-10-14 1997-10-14 Precision depth guided instruments for use in vertebroplasty

Publications (2)

Publication Number Publication Date
WO1999018865A1 WO1999018865A1 (en) 1999-04-22
WO1999018865B1 true WO1999018865B1 (en) 1999-05-27

Family

ID=25490367

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/021572 WO1999018865A1 (en) 1997-10-14 1998-10-13 Precision depth guided instruments for use in vertebroplasty

Country Status (3)

Country Link
US (1) US6019776A (en)
AU (1) AU1081599A (en)
WO (1) WO1999018865A1 (en)

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