CA1200288A - Electrical lead and insertion tool - Google Patents
Electrical lead and insertion toolInfo
- Publication number
- CA1200288A CA1200288A CA000421832A CA421832A CA1200288A CA 1200288 A CA1200288 A CA 1200288A CA 000421832 A CA000421832 A CA 000421832A CA 421832 A CA421832 A CA 421832A CA 1200288 A CA1200288 A CA 1200288A
- Authority
- CA
- Canada
- Prior art keywords
- lead
- insertion tool
- flexible base
- inserter
- lead body
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/04—Electrodes
- A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
- A61N1/0587—Epicardial electrode systems; Endocardial electrodes piercing the pericardium
Abstract
ABSTRACT OF THE DISCLOSURE
The invention provides an insertion tool for use with an improved cardiac pacing lead of the type having a barbed electrode and a flexible base pad disposed over the electrode. The insertion tool is provided with a slot for engaging the flexible base pad and a groove for engaging the lead body at an angle to the base pad, exposing the barbed electrode. The lead body is provided with an enlarged diameter segment for frictionally engaging the insertion tool.
The invention provides an insertion tool for use with an improved cardiac pacing lead of the type having a barbed electrode and a flexible base pad disposed over the electrode. The insertion tool is provided with a slot for engaging the flexible base pad and a groove for engaging the lead body at an angle to the base pad, exposing the barbed electrode. The lead body is provided with an enlarged diameter segment for frictionally engaging the insertion tool.
Description
This invention relates to the field o~ medical electronics and, in particular, to electrical leads and devices for handling electrical leads.
An electrical lead including an insulated conductor coil adjacent to a flexible base pad and a barbed electrode spaced adjacent to the base pad and connected to the conductor coil is described in commonly assigned United States Patent No. ~,313,~48 "Myocardial Sutureless Lead" issued February 2, 1982.
The electrode is secured to the heart by gently inserting the tip of the electrode into the myocardial tissue. The flexible base pad limit~ the implantation depth of the barbed electrode and provides flexibility between the electrode and the lead.
When inserting the lead, it is beneficial to have the flexible base pad bent away from the barbed electrode, allowing the physician to visually locate the barbed electrode when the lead is inser-ted. Current practice involves the use of a surgical forceps to bend the flexible base back and hold the lead while it is being inserted. The use of a forceps results in extremely high, localized pressures being applied to the lead, increasing the possibility of permanent deformation oE the lead. In addition, the present techniques for both grasping the lead and bending back the flexible base have proven to be somewhat awkward, complicating the insertion procedure.
The purpose o the present invention is to provide an insertion tool for use with a sutureless myocardial unipolar lead of the type having a fixatlon llleans and a flexible base means disposed over the Eixation means which facilitates attachment oE the lead with the body tissue.
According to the preferred embodiment of the present invention, there is an elongated inserter body which has at its distal end a slot Eor engagement with the flexible base. Intersecting this slot is a groove for ;~"
~ .
., engagement with the leacl body, oriented so that the lead body, when so engaged, is anyled relative to the flexible base means, exposing the barbed electrode. The groove extends to the proximal end of the inserter body, allowing the lead body to rest within this groove during insertion.
At the proximal end of the inserter body is a friction-al engagement means for frictionally engaging the body of the lead. In its preferred embodiment, the frictional attachment means consists of two projections flanking the groove, which are engaged ~lith an increased diameter segmentof the lead body.
A slight stretching of the lead is required to engaye the increased diameter segment with -the projections, and the resulting tension on the lead body maintains this engagement. The combination of the engagement of the flexible base pad with the slot and the engagement of the lead body with the frictional attachment means of the inserter body keeps the lead stably mounted on the insertion tool. Removal of the lead is easily accomplished by slightly stretching the lead body, disengaging the enlarged diameter segment and sliding the inserter body off of the flexible base means.
In accordance with a broad aspect of the invention there is provided an insertion tool for use with a body implantable lead of the type comprising: an elongated lead body having a proximal end and a distal end, further comprised of an elongated insultative sheath and an elongated electrical conductor, having ~1 proximal end and a distal end, fixedly mounted within said elongated insulative sheath; means attached to said conductor near the distal end of ~q~
said lead body for fixing said body implantable lead -to body tissue; flexible base means attached to said lead body near the distal end of said lead body which, in a relaxed state, is dis-posed over said fixation means from at least one direction and which, upon application of a small amount of force, may be bent back exposing said fixation means from said at least one direction;
said insertion tool compxising: a first engageable means for releasably engaging said flexible base means; and second engage-able means for releasably engaging said lead body at an angle relative to said flexible base means whereby said flexible base means i.s bent back exposing said fixation means from said at least one direction.
Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection wi-th the accompanying drawings wherein:
Figure 1 illustrates a bottom plan view of a sutureless myocardial lead suitable for use with the present invention;
Figure 2 illustrates a side plan view of a sutureless mvocardlal lead suitable for use with the present invention; Figure 3 illus-trates a side plan view of a preferred embodiment of the insertion tool of the present invention; Figure 4 illustrates a top plan view of the insertion tool shown in Figure 3; Figure 5 illustrates a top plan -2a ~f~
view of the insertion tool shown in Flgure 3; Figure 6 lllustrates an end-on plan view of the distal end of the insertion tool shown in Figure 3; Figure 7 is an end-on view of the distal end of the preferred embodiment of the insertion tool of the invention;
Figures 8a, 8b, and 8c illustrate the technique for inserting the lead shown in Figure 1 into the insertion tool shown in Figure 3;
and Figures 9a, 9b, 9c, 9d and 9e illustrate the use of the insertion tool shown in Figure 3 to attach the lead shown in Figure 1 to body tissue.
Figure 1 illustrates a top plan view of a lead of the type suitable for use with the present invention. The myocardial lead 10 includes a forward-facing, in line barbed electrode 12 on the underside of a flexible base pad 14. l'he base pad 14 has a plurality of optional suture holes 14a, 14b, 14c and 14d and a centered hole 14e through which barbed electrode 12 protrudes.
A surgical mesh 18 having a circurnferential portion running approximately 270 from centered hole 14e surrounds centered hole 14e and provides for fibrous ingrowth. The lead body 16 is a polyether urethane elastomer surrounding a mu]tifilar coil 19 of silver/MP35N composite drawn brazed strand (DBS wire), which provides an insulated conductor with stretch and flexibili-ty.
I,ead body 16 is further comprised of a large diameter segment 17.
Figure 2 illustra-tes a side plan view of sutureless myocardial lead 10. Barbed electrode 12 includes a tip 12a, a tlp shank 12b, and a connecting shank 12c. Barbed electrode 12 is coupled to multifilar coil 19. Base pad 14 and surgical mesh 18 are visible in side view.
Figure 3 illus-trates a side plan view of -the preferred embodiment of the insertion -tool o~ the present invention. The distal end of insertion tool 20 is comprised of inserter head 22.
Running from inserter head 22 to the proximal end of inser-tion tool 20 is elongated handle 24. Inserter head 22 is provided with a slot 26 fo:r engagement with fle~ible base pad 14 (Figure 1).
-3a-~2~28~
Lead body groove 28, indicated by broken line, runs from the distal end to the proximal end of insertion tool 20. Located at the proximal end of insertion tool 20 are projection 30a and projection 30b (not visible) which flank lead body groove 28.
Figure 4 illustrates a top plan view of the preferred embodiment of the insertion tool of the present invention. In this view, projections 30a and 30b are both visible at the proximal end of insertion tool 20. Inserter head 22 is seen to be comprised of lead body groove 28 and slot 26 ~illustrated by broken line).
lo Figure 5 illustrates a bottom plan of the preferred embodiment of the inserti.on tool of the present invention. Lead body slot 28 is seen to narrow at constriction point 32 to a reduced width segment 34. Projections 30a and 30b are seen to flank reduced width section 34 of lead body groove 28. Slot 26 is indicated by broken line.
Figure 6 illustrates an end-on plan view of the proximal end of the insertion tool of the present invention. All numerals correspond to those elements previously delineated in the above figures.
Figure 7 illustrates an end-on view of the distal end of the preferred embodiment of the insertion tool of the present invention. Slot 26 is seen to intersect lead body groove 28 on inserter head 22. All other numerals corres-pond to those elements previously delineated in the above figures.
Insertion tool 20 may be made, for example, of a hard plastic material such as Delrin~ which is a trade mark of the E.I. DuPont de Nemours Co.
:Eor a biocompatible plastic. Preferably, insertion -tool 20 should be made of an autoclavible material.
Figures 8a, 8b~ and 8c illustrate the mounting of myocardial lead 20 on to insertion tool 20. Figure 8a shows the flexible base pad 14 of lead 10 ~z~
inserted into slot 26 of insertion tool 20. Figure 8b shows lead body 16 bent relative to flexible base pad 1~ exposing barbed electrode 12. Lead body 16 is stretched slightly so that enlarged diameter portion 17 extends proximal to projections 30a and 30b on the proximal end of insertion tool 20. Fig~re 8c shows lead body 16 laid within lead body groove 28 (Figure 5). Enlarged dia-meter segment 17 is seen to engage protrusions 30a and 30b. The slight tension on lead body 16 due to its stretching prevents enlarged diameter segment 17 from disengaging from protrusions 30a and 30b. All other numerals correspond to those elements previously delineated in the above drawings.
Figures 9a, 9b, 9c, 9d and 9e illustrate the technique of engaging lead 10 with body tissue ~0 through use of insertion tool 20. Figure 9a shows lead 10 mounted on insertion tool 20. Barbed electrode 12 is exposed. Figure 9b illustrates the engagement of barbed electrode 12 with heart tissue ~10.
Electrode 12 is engaged using a scooping motion of inserter head 22. Figure 9c illustrates the disengagement of enlarged diameter segment 17 once barbed elec-trode 12 has engaged the body tissue. By stretching lead body 16 slightly, enlarged diameter portion 17 is moved proximal to protrusions 30a and 30b so that it may be disengaged from them. Figure 9d illustrates the removal of Elexible base means 1~ from slot 26 of inserter head 22. Tension on lead body 16 is relaxed~ allowing it to return to its original ler.gth, and insertion tool 20 :is slid ofE of Elexible base pad l~ by pulling inserter tool 20 away :Erom body tissue ~0. Figure 9e illustrates lead 10 in its position after engagement with body tissue ~0. Flexible base pad 1~ has returned to its original configuration, lying Elat against body tissue ~0. Insertion tool 20 may now be completely removed .
~Z0~ 8~
From the foregoing description those skilled in the art will appreciate ~hat numerous modifications may be made of this invention without departing from its spirit. Therefore, it is not intended to limit the breadth of this invention to the embodiment illustrated and described. Rather, it is intended that the breadth of this invention be determined by the appended Claims and their equivalents.
An electrical lead including an insulated conductor coil adjacent to a flexible base pad and a barbed electrode spaced adjacent to the base pad and connected to the conductor coil is described in commonly assigned United States Patent No. ~,313,~48 "Myocardial Sutureless Lead" issued February 2, 1982.
The electrode is secured to the heart by gently inserting the tip of the electrode into the myocardial tissue. The flexible base pad limit~ the implantation depth of the barbed electrode and provides flexibility between the electrode and the lead.
When inserting the lead, it is beneficial to have the flexible base pad bent away from the barbed electrode, allowing the physician to visually locate the barbed electrode when the lead is inser-ted. Current practice involves the use of a surgical forceps to bend the flexible base back and hold the lead while it is being inserted. The use of a forceps results in extremely high, localized pressures being applied to the lead, increasing the possibility of permanent deformation oE the lead. In addition, the present techniques for both grasping the lead and bending back the flexible base have proven to be somewhat awkward, complicating the insertion procedure.
The purpose o the present invention is to provide an insertion tool for use with a sutureless myocardial unipolar lead of the type having a fixatlon llleans and a flexible base means disposed over the Eixation means which facilitates attachment oE the lead with the body tissue.
According to the preferred embodiment of the present invention, there is an elongated inserter body which has at its distal end a slot Eor engagement with the flexible base. Intersecting this slot is a groove for ;~"
~ .
., engagement with the leacl body, oriented so that the lead body, when so engaged, is anyled relative to the flexible base means, exposing the barbed electrode. The groove extends to the proximal end of the inserter body, allowing the lead body to rest within this groove during insertion.
At the proximal end of the inserter body is a friction-al engagement means for frictionally engaging the body of the lead. In its preferred embodiment, the frictional attachment means consists of two projections flanking the groove, which are engaged ~lith an increased diameter segmentof the lead body.
A slight stretching of the lead is required to engaye the increased diameter segment with -the projections, and the resulting tension on the lead body maintains this engagement. The combination of the engagement of the flexible base pad with the slot and the engagement of the lead body with the frictional attachment means of the inserter body keeps the lead stably mounted on the insertion tool. Removal of the lead is easily accomplished by slightly stretching the lead body, disengaging the enlarged diameter segment and sliding the inserter body off of the flexible base means.
In accordance with a broad aspect of the invention there is provided an insertion tool for use with a body implantable lead of the type comprising: an elongated lead body having a proximal end and a distal end, further comprised of an elongated insultative sheath and an elongated electrical conductor, having ~1 proximal end and a distal end, fixedly mounted within said elongated insulative sheath; means attached to said conductor near the distal end of ~q~
said lead body for fixing said body implantable lead -to body tissue; flexible base means attached to said lead body near the distal end of said lead body which, in a relaxed state, is dis-posed over said fixation means from at least one direction and which, upon application of a small amount of force, may be bent back exposing said fixation means from said at least one direction;
said insertion tool compxising: a first engageable means for releasably engaging said flexible base means; and second engage-able means for releasably engaging said lead body at an angle relative to said flexible base means whereby said flexible base means i.s bent back exposing said fixation means from said at least one direction.
Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection wi-th the accompanying drawings wherein:
Figure 1 illustrates a bottom plan view of a sutureless myocardial lead suitable for use with the present invention;
Figure 2 illustrates a side plan view of a sutureless mvocardlal lead suitable for use with the present invention; Figure 3 illus-trates a side plan view of a preferred embodiment of the insertion tool of the present invention; Figure 4 illustrates a top plan view of the insertion tool shown in Figure 3; Figure 5 illustrates a top plan -2a ~f~
view of the insertion tool shown in Flgure 3; Figure 6 lllustrates an end-on plan view of the distal end of the insertion tool shown in Figure 3; Figure 7 is an end-on view of the distal end of the preferred embodiment of the insertion tool of the invention;
Figures 8a, 8b, and 8c illustrate the technique for inserting the lead shown in Figure 1 into the insertion tool shown in Figure 3;
and Figures 9a, 9b, 9c, 9d and 9e illustrate the use of the insertion tool shown in Figure 3 to attach the lead shown in Figure 1 to body tissue.
Figure 1 illustrates a top plan view of a lead of the type suitable for use with the present invention. The myocardial lead 10 includes a forward-facing, in line barbed electrode 12 on the underside of a flexible base pad 14. l'he base pad 14 has a plurality of optional suture holes 14a, 14b, 14c and 14d and a centered hole 14e through which barbed electrode 12 protrudes.
A surgical mesh 18 having a circurnferential portion running approximately 270 from centered hole 14e surrounds centered hole 14e and provides for fibrous ingrowth. The lead body 16 is a polyether urethane elastomer surrounding a mu]tifilar coil 19 of silver/MP35N composite drawn brazed strand (DBS wire), which provides an insulated conductor with stretch and flexibili-ty.
I,ead body 16 is further comprised of a large diameter segment 17.
Figure 2 illustra-tes a side plan view of sutureless myocardial lead 10. Barbed electrode 12 includes a tip 12a, a tlp shank 12b, and a connecting shank 12c. Barbed electrode 12 is coupled to multifilar coil 19. Base pad 14 and surgical mesh 18 are visible in side view.
Figure 3 illus-trates a side plan view of -the preferred embodiment of the insertion -tool o~ the present invention. The distal end of insertion tool 20 is comprised of inserter head 22.
Running from inserter head 22 to the proximal end of inser-tion tool 20 is elongated handle 24. Inserter head 22 is provided with a slot 26 fo:r engagement with fle~ible base pad 14 (Figure 1).
-3a-~2~28~
Lead body groove 28, indicated by broken line, runs from the distal end to the proximal end of insertion tool 20. Located at the proximal end of insertion tool 20 are projection 30a and projection 30b (not visible) which flank lead body groove 28.
Figure 4 illustrates a top plan view of the preferred embodiment of the insertion tool of the present invention. In this view, projections 30a and 30b are both visible at the proximal end of insertion tool 20. Inserter head 22 is seen to be comprised of lead body groove 28 and slot 26 ~illustrated by broken line).
lo Figure 5 illustrates a bottom plan of the preferred embodiment of the inserti.on tool of the present invention. Lead body slot 28 is seen to narrow at constriction point 32 to a reduced width segment 34. Projections 30a and 30b are seen to flank reduced width section 34 of lead body groove 28. Slot 26 is indicated by broken line.
Figure 6 illustrates an end-on plan view of the proximal end of the insertion tool of the present invention. All numerals correspond to those elements previously delineated in the above figures.
Figure 7 illustrates an end-on view of the distal end of the preferred embodiment of the insertion tool of the present invention. Slot 26 is seen to intersect lead body groove 28 on inserter head 22. All other numerals corres-pond to those elements previously delineated in the above figures.
Insertion tool 20 may be made, for example, of a hard plastic material such as Delrin~ which is a trade mark of the E.I. DuPont de Nemours Co.
:Eor a biocompatible plastic. Preferably, insertion -tool 20 should be made of an autoclavible material.
Figures 8a, 8b~ and 8c illustrate the mounting of myocardial lead 20 on to insertion tool 20. Figure 8a shows the flexible base pad 14 of lead 10 ~z~
inserted into slot 26 of insertion tool 20. Figure 8b shows lead body 16 bent relative to flexible base pad 1~ exposing barbed electrode 12. Lead body 16 is stretched slightly so that enlarged diameter portion 17 extends proximal to projections 30a and 30b on the proximal end of insertion tool 20. Fig~re 8c shows lead body 16 laid within lead body groove 28 (Figure 5). Enlarged dia-meter segment 17 is seen to engage protrusions 30a and 30b. The slight tension on lead body 16 due to its stretching prevents enlarged diameter segment 17 from disengaging from protrusions 30a and 30b. All other numerals correspond to those elements previously delineated in the above drawings.
Figures 9a, 9b, 9c, 9d and 9e illustrate the technique of engaging lead 10 with body tissue ~0 through use of insertion tool 20. Figure 9a shows lead 10 mounted on insertion tool 20. Barbed electrode 12 is exposed. Figure 9b illustrates the engagement of barbed electrode 12 with heart tissue ~10.
Electrode 12 is engaged using a scooping motion of inserter head 22. Figure 9c illustrates the disengagement of enlarged diameter segment 17 once barbed elec-trode 12 has engaged the body tissue. By stretching lead body 16 slightly, enlarged diameter portion 17 is moved proximal to protrusions 30a and 30b so that it may be disengaged from them. Figure 9d illustrates the removal of Elexible base means 1~ from slot 26 of inserter head 22. Tension on lead body 16 is relaxed~ allowing it to return to its original ler.gth, and insertion tool 20 :is slid ofE of Elexible base pad l~ by pulling inserter tool 20 away :Erom body tissue ~0. Figure 9e illustrates lead 10 in its position after engagement with body tissue ~0. Flexible base pad 1~ has returned to its original configuration, lying Elat against body tissue ~0. Insertion tool 20 may now be completely removed .
~Z0~ 8~
From the foregoing description those skilled in the art will appreciate ~hat numerous modifications may be made of this invention without departing from its spirit. Therefore, it is not intended to limit the breadth of this invention to the embodiment illustrated and described. Rather, it is intended that the breadth of this invention be determined by the appended Claims and their equivalents.
Claims (15)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An insertion tool for use with a body implantable lead of the type comprising an elongated lead body having a proximal end and a distal end, further comprised of an elongated insulative sheath and an elongated electrical Conductor, having a proximal end and a distal end, fixedly mounted within said elongated insulative sheath; means attached to said conductor near the distal end of said lead body for fixing said body implantable lead to body tissue;
flexible base means attached to said lead body near the distal end of said lead body which, in a relaxed state, is disposed over said fixation means from at least one direction and which, upon application of a small amount of force, may be bent back exposing said fixation means from said at least one direction;
said insertion tool comprising: a first engageable means for releasably engaging said flexible base means; and second engageable means for releasably engaging said lead body at an angle relative to said flexible base means whereby said flexible base means is bent back exposing said fixation means from said at least one direction.
flexible base means attached to said lead body near the distal end of said lead body which, in a relaxed state, is disposed over said fixation means from at least one direction and which, upon application of a small amount of force, may be bent back exposing said fixation means from said at least one direction;
said insertion tool comprising: a first engageable means for releasably engaging said flexible base means; and second engageable means for releasably engaging said lead body at an angle relative to said flexible base means whereby said flexible base means is bent back exposing said fixation means from said at least one direction.
2. An insertion tool according to claim 1 wherein said first engageable means comprises an inserter body having a slot defined therein for engagement with said flexible base means.
3. An insertion tool according to claim 2 wherein said second engageable means comprises said inserter body having a groove defined therein, angled relative to the slot in said inserter body, for engaging said lead body whereby hen said flexible base means is inserted into the slot in said inserter body and said lead body is engaged with the groove of said. inserter body, said flex-ible base means is bent back, exposing said fixation means from said at least one direction.
4. An insertion tool according to claim 3 further comprised of a frictional engagement means for holding said lead body in the groove of said inserter body.
5. An insertion tool according to claim 4 wherein said inserter body is further comprised of an elongated member.
6. An insertion tool according to claim 5 wherein the groove of said inserter body runs the length of said elongated member.
7. The combination of a body implantable lead and an insertion tool, said body implantable lead comprising: an elongated lead body having a proximal end and a distal end, further comprised of an elongated insulative sheath and of an elongated electrical conductor having a proximal end and distal end mounted within said insulative sheath; means attached to said conductor near the distal end of said lead body for fixing said body implantable lead;
flexible base means attached to said body near the distal end of said lead body which, in a relaxed state, is disposed over said fixation means from at least one direction and which, upon application of a small amount of force, may be bent back exposing said fixation means from said at least one direction; and said lead body further comprised of a frictional engagement means for engagement with said insertion tool; said insertion tool comprising: a first engageable means for releasably engaging said flexible base means; a second engageable means for releasably engaging said lead body at an angle relative to said flexible base means whereby said flexible base means is bent back exposing said fixation means from said at least one direction.
flexible base means attached to said body near the distal end of said lead body which, in a relaxed state, is disposed over said fixation means from at least one direction and which, upon application of a small amount of force, may be bent back exposing said fixation means from said at least one direction; and said lead body further comprised of a frictional engagement means for engagement with said insertion tool; said insertion tool comprising: a first engageable means for releasably engaging said flexible base means; a second engageable means for releasably engaging said lead body at an angle relative to said flexible base means whereby said flexible base means is bent back exposing said fixation means from said at least one direction.
8. An implantable lead and insertion tool according to claim 7 wherein said first engageable means comprises an inserter body having a slot defined therein for engagement with said flexible base means.
9. An implantable lead and insertion tool according to claim 8 wherein said second engageable means comprises said inserter body having a groove defined therein at an angle relative to the slot of said inserter body for engaging said lead body whereby when said flexible base means is engaged with the slot in said inserter and said lead body is engaged with the groove of said inserter body, said flexible base means is bent back, exposing said fixa-tion means from said at least one direction.
10. An implantable lead and insertion tool according to claim 9 wherein said inserter body is comprised of an elongated member.
11. An implantable lead and insertion tool and lead according to claim 10 wherein the groove of said inserter body runs the length of said elongated member.
12. An implantable lead and insertion tool according to claim 11 wherein said inserter body is further comprised of a third engageable means for engaging said frictional engagement means of said implantable lead.
13. An implantable lead and insertion tool according to claim 7, claim 8 or claim 9 wherein said frictional engagement means on said lead body comprises an enlarged diameter segment of said lead body.
14. An implantable lead and insertion tool according to claim 10, claim 11 or claim 12 wherein said frictional engagement means on said lead body comprises an enlarged diameter segment of said lead body.
15. A lead according to claim 12 wherein said third engageable means comprises two protrusions flanking the groove of said inserter body on said elongated member, said protrusions spaced at a distance from one another which is smaller than the diameter of said enlarged diameter portion of said lead body, whereby said protrusions may frictionally engage said enlarged diameter portion of said lead body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US349,726 | 1982-02-18 | ||
| US06/349,726 US4424818A (en) | 1982-02-18 | 1982-02-18 | Electrical lead and insertion tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1200288A true CA1200288A (en) | 1986-02-04 |
Family
ID=23373691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000421832A Expired CA1200288A (en) | 1982-02-18 | 1983-02-17 | Electrical lead and insertion tool |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4424818A (en) |
| EP (1) | EP0087130B1 (en) |
| AU (1) | AU557967B2 (en) |
| CA (1) | CA1200288A (en) |
| DE (1) | DE3363862D1 (en) |
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| US4620550A (en) * | 1985-04-15 | 1986-11-04 | Schering A.G. | Implantable bipolar stimulating electrode |
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| US5313953A (en) * | 1992-01-14 | 1994-05-24 | Incontrol, Inc. | Implantable cardiac patient monitor |
| US5366489A (en) * | 1993-06-02 | 1994-11-22 | Minnesota Mining And Manufacturing Company | Anesthesia electrode and applicator assembly |
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| US5897585A (en) * | 1997-12-18 | 1999-04-27 | Medtronic, Inc. | Stretchable pacing lead |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4207903A (en) * | 1978-04-28 | 1980-06-17 | Medtronic, Inc. | Device for screwing body tissue electrode into body tissue |
| US4299239A (en) * | 1979-02-05 | 1981-11-10 | Intermedics, Inc. | Epicardial heart lead assembly |
| US4280510A (en) * | 1979-02-08 | 1981-07-28 | Medtronic, Inc. | Sutureless myocardial lead introducer |
| US4271846A (en) * | 1979-04-23 | 1981-06-09 | Daig Corporation | Lead installation tool |
| US4333455A (en) * | 1979-12-26 | 1982-06-08 | Sherwood Medical Industries Inc. | Injectable catheter and method of placing same |
| US4313448A (en) * | 1980-01-28 | 1982-02-02 | Medtronic, Inc. | Myocardial sutureless lead |
-
1982
- 1982-02-18 US US06/349,726 patent/US4424818A/en not_active Expired - Fee Related
-
1983
- 1983-02-17 EP EP83101521A patent/EP0087130B1/en not_active Expired
- 1983-02-17 CA CA000421832A patent/CA1200288A/en not_active Expired
- 1983-02-17 AU AU11500/83A patent/AU557967B2/en not_active Ceased
- 1983-02-17 DE DE8383101521T patent/DE3363862D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU557967B2 (en) | 1987-01-15 |
| DE3363862D1 (en) | 1986-07-10 |
| AU1150083A (en) | 1983-08-25 |
| EP0087130A1 (en) | 1983-08-31 |
| US4424818A (en) | 1984-01-10 |
| EP0087130B1 (en) | 1986-06-04 |
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