CA1150580A - Stylet - Google Patents
StyletInfo
- Publication number
- CA1150580A CA1150580A CA000366671A CA366671A CA1150580A CA 1150580 A CA1150580 A CA 1150580A CA 000366671 A CA000366671 A CA 000366671A CA 366671 A CA366671 A CA 366671A CA 1150580 A CA1150580 A CA 1150580A
- Authority
- CA
- Canada
- Prior art keywords
- stylet
- wire
- inches
- diameter
- ball
- 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
- A61N1/056—Transvascular endocardial electrode systems
Abstract
ABSTRACT OF THE DISCLOSURE
Disclosed is a stylet for use with a transvenous pacing lead including a longitudinal stylet wire, a handle affixed to the proximal end of the stylet wire, a taper of a predetermined length formed adjacent to or on the distal end of the stylet wire, and a ball affixed to the end of the stylet wire where the ball has a diameter substantially equal to the diameter of the stylet wire. The taper at the distal end of the stylet provides strain relief, least rigidity of the stylet wire and complies with the curvature bends of the transvenous pacing lead. The tapered end of the stylet wire can also be referred to as a soft tip stylet wire.
Disclosed is a stylet for use with a transvenous pacing lead including a longitudinal stylet wire, a handle affixed to the proximal end of the stylet wire, a taper of a predetermined length formed adjacent to or on the distal end of the stylet wire, and a ball affixed to the end of the stylet wire where the ball has a diameter substantially equal to the diameter of the stylet wire. The taper at the distal end of the stylet provides strain relief, least rigidity of the stylet wire and complies with the curvature bends of the transvenous pacing lead. The tapered end of the stylet wire can also be referred to as a soft tip stylet wire.
Description
3s~
The present invention pertains to a surgical instrument, and more particularly, pertains to a stylet having a tapered distal end and a ball affixed to the end of the stylet wire.
Prior art stylets usually have consisted of a stylet wire with con-stant diameter along the entire longitudinal length of the stylet wire and in-cluding a handle af~ixed to the proximal end. This type of stylet has two dis-advantages: the first being rigidity along the entire longitudinal length of the stylet wire; and the second being that the end of ~he stylet wire sometimes punctures through the coil end insulation of a transvenous pacing lead. The first disadvantage with a stylet wire of constant diameter is ~hat there is limited flexibility as the entire length of the stylet wire is rigid, especially at the end of the stylet wire. Consequently, the stylet wire somtimes does not comply with the bends and curvatures of a transvenous pacing lead during inser-tion of the pacing lead. Also, it is sometimes difficult for medical personnel to push a stylet wire through a transvenous pacing lead. The second disadvant-age is that the sharp edges of the distal end of the stylet wire sometimes will protrude through a curve or bend in a transvenous pacing lead thereby violating the wire coil and insulation of the lead. Sometimes, the end of the stylet wire will also puncture the vein or worse yet, puncture heart tissue or heart wall.
Also, instead of the stylet complying to a bend in the lead, the leads bend be-comes sharper, using present styplets, allowing the stylet tip to perforate the lead.
The stylet of the present invention provides a taper at the distal end of the stylet~ thereby providing a soft tip stylet and also includes a ball on the end of the taper providing for easy compliance while being passed through new compliant transvenous pacing lead now on the stylet.
A stylet of the present invention provides a soft tip stylet which .~, complies with curvatures and bends of the transvenous pacing lead and includes aball at the distal end of the stylet wire which easily passes through the trans-venous pacing lead.
According to a broad aspect of the invention there is provided a stylet for guiding implantation of a transvenous pacing lead wherein said stylet has a wire with a knob at a proximal end, characterized in that the distal portion of said ~ire is more flexible than a proximal portion, in that a distal tip of saidwire has a ball affixed thereto having a diameter substantially equal to the diameter of said stylet wire for preventing perforation of said pacing lead, andin that said stylet is provided with a taper intermediate said proximal end and said ball.
According to one embodiment of the present invention, there is provid-ed a stylet including a stylet wire having a handle affixed to a proximal end, a taper at the distal end at or near the distal end of the stylet wire, and a round ball affixed to the distal end of the stylet wire whereby the taper at or near the distal end of the stylet wire provides strain relief and compliance with curvatures and bends while passed through a transvenous pacing lead and the ballat the distal end of the taper of the stylet wire provides for easy pass-throughof the distal end of the stylet wire through the transvenous pacing lead.
A significant aspect and feature of the present invention is a taper at or near and adjacent to the distal end of the stylet wire which provides for a soft distal tip end of the stylet wire which conforms to the bends and curves of the transvenous pacing lead.
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 with the accompanying drawing in which like reference numerals designate like parts throughout the FIGURE~ thereof and wherein:
FIGURE 1 is a plan view of a stylet, the present invention, where the
The present invention pertains to a surgical instrument, and more particularly, pertains to a stylet having a tapered distal end and a ball affixed to the end of the stylet wire.
Prior art stylets usually have consisted of a stylet wire with con-stant diameter along the entire longitudinal length of the stylet wire and in-cluding a handle af~ixed to the proximal end. This type of stylet has two dis-advantages: the first being rigidity along the entire longitudinal length of the stylet wire; and the second being that the end of ~he stylet wire sometimes punctures through the coil end insulation of a transvenous pacing lead. The first disadvantage with a stylet wire of constant diameter is ~hat there is limited flexibility as the entire length of the stylet wire is rigid, especially at the end of the stylet wire. Consequently, the stylet wire somtimes does not comply with the bends and curvatures of a transvenous pacing lead during inser-tion of the pacing lead. Also, it is sometimes difficult for medical personnel to push a stylet wire through a transvenous pacing lead. The second disadvant-age is that the sharp edges of the distal end of the stylet wire sometimes will protrude through a curve or bend in a transvenous pacing lead thereby violating the wire coil and insulation of the lead. Sometimes, the end of the stylet wire will also puncture the vein or worse yet, puncture heart tissue or heart wall.
Also, instead of the stylet complying to a bend in the lead, the leads bend be-comes sharper, using present styplets, allowing the stylet tip to perforate the lead.
The stylet of the present invention provides a taper at the distal end of the stylet~ thereby providing a soft tip stylet and also includes a ball on the end of the taper providing for easy compliance while being passed through new compliant transvenous pacing lead now on the stylet.
A stylet of the present invention provides a soft tip stylet which .~, complies with curvatures and bends of the transvenous pacing lead and includes aball at the distal end of the stylet wire which easily passes through the trans-venous pacing lead.
According to a broad aspect of the invention there is provided a stylet for guiding implantation of a transvenous pacing lead wherein said stylet has a wire with a knob at a proximal end, characterized in that the distal portion of said ~ire is more flexible than a proximal portion, in that a distal tip of saidwire has a ball affixed thereto having a diameter substantially equal to the diameter of said stylet wire for preventing perforation of said pacing lead, andin that said stylet is provided with a taper intermediate said proximal end and said ball.
According to one embodiment of the present invention, there is provid-ed a stylet including a stylet wire having a handle affixed to a proximal end, a taper at the distal end at or near the distal end of the stylet wire, and a round ball affixed to the distal end of the stylet wire whereby the taper at or near the distal end of the stylet wire provides strain relief and compliance with curvatures and bends while passed through a transvenous pacing lead and the ballat the distal end of the taper of the stylet wire provides for easy pass-throughof the distal end of the stylet wire through the transvenous pacing lead.
A significant aspect and feature of the present invention is a taper at or near and adjacent to the distal end of the stylet wire which provides for a soft distal tip end of the stylet wire which conforms to the bends and curves of the transvenous pacing lead.
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 with the accompanying drawing in which like reference numerals designate like parts throughout the FIGURE~ thereof and wherein:
FIGURE 1 is a plan view of a stylet, the present invention, where the
- 2 -' `' ~
5~
distal end is shown in an exploded view and the proximal end is broken;
FIGURE 2 is an exploded plan view of the distal end of the stylet;
and, FIGURE 3 is an exploded plan view of an alternative embodiment of a distal end of an alternative stylet.
FIGURE 1, which illustrates a plan view of a stylet 10, the present invention, shows a longitudinal stylet wire 12 having a taper 14 at the distal end and a handle 16 affixed to the proximal end of the stylet wire 12 by struc-ture known in the art. For purposes of clarity in the drawings for illustrating the distal end and proximal end of the stylet wire 12, the stylet wire is broken as illustrated in the figure. Bal] 18 is affixed to a distal end 20 of the taper 14 by processes known in the art, such as by welding.
Taper 14 is a gradual taper from junction 22 of the diameter of the wire where the taper begins to the distal end 20 of the stylet wire 12 at which point the ball 18 is secured to the distal end 20. Taper 14 can be formed such as by centerless grinding or a drawn process by way of example and for purposes of illustration only. The length of the taper 14 is predetermined by a number of factors, such as the diameter of the stylet wire, the spring constant of the stylet wire, the particular application of the stylet for use in a transvenous pacing lead to a heart appendage, and other considerations as dictated by the medical factors. The length of the taper 14 can vary in the range of a couple inches, such as three or four, to a quarter of an inch over the length of the taper 14. By way of example and for purposes of illustration, the taper 14 has been shown to extend over one-half inch of the distal end of the stylet wire 12.
The diameter of the ball 18 is considered to be the same diameter as the dia-meter of the stylet wire, but may range in size to be more or less than the dia-meter of the stylet wire 12.
...- , , 5~
FIGURE 2, which illustrates an exploded plan view of the distal end of the stylet wire, shows the stylet wire 12 having a diameter of .014 inches, a taper from the junction 22 down to the distal end 20 of .014 to .008 inches, al-though the .008 inches could be in ~he range of .01 to .006 or less or, alter-natively as great as .009 to .013 and the diameter of the ball 18 is substant-ially equal to the diameter of stylet wire 12, .014 inches.
The stylet 10 of the present invention can be inserted into a trans-venous pacing lead before the transvenous pacing lead is passed through a vein, or in the alternative, stylet 12 can be inserted into the transvenous pacing lead on initial passing of the transvenous pacing lead through a vein or after the distal end of the lead has been placed within the body. The ball 18 pro-vides smooth insertion of the stylet 12 within a transvenous pacing lead without the concern of the distal end of the stylet wire 12 violating the wound coil of the transvenous pacing lead or protruding through the insulation of the trans-- venous pacing lead. The distal end of the stylet 12, especially over the length of the taper 14, provides a soft tip which complies with the curvature and bends of the transvenous pacing lead, allowing for easy insertion and control around the curves and bends of the lead.
FIGURE 3 is an exploded plan view of a distal end for an alternative embodiment of a stylet 30, which includes a stylet wire 32 having a constant diameter, the proximal end of which connects to a stylet handle as previously described for FIGURES 1 and 2 and not illustrated for purposes of clarity in the drawing and having a taper 34 running from the junction 36 of the constant dia-meter of the stylet wire 32 and the taper 34 to a junction 38 of the end of the taper 34 of the stylet wire 32 and a wire 40 of constant diameter. A ball 42 of a diameter substantially equal to the diameter of the stylet wire 32 affixes to the distal end of the constant diameter wire 40. As previously described and by :, way of example and for purposes of illustration only, the diameter of the stylet wire 32 can be .014 inches, the taper can occur three-quarters of the length of the stylet wire from the junction 36, such as from .014 inches to .008 inches, to the ball 42 and remaining wire 40 can be of constant diameter of .008 inches by l~ay of example and for purposes of illustration only while the constant dia-meter wire 40 can be in the last one-quarter of the length of the distal end from junction 36 to ball 42. The numerical diameters and length are by way of example and for purposes of illustration only in illustrating an operative alternative embodiment of the present invention, and can be varied depending upon the particular medical application, and are not to be construed as limiting of the presen~ invention.
Various modifications can be made to the stylet of the present inven-tion without departing from the apparent scope of the present invention.
5~
distal end is shown in an exploded view and the proximal end is broken;
FIGURE 2 is an exploded plan view of the distal end of the stylet;
and, FIGURE 3 is an exploded plan view of an alternative embodiment of a distal end of an alternative stylet.
FIGURE 1, which illustrates a plan view of a stylet 10, the present invention, shows a longitudinal stylet wire 12 having a taper 14 at the distal end and a handle 16 affixed to the proximal end of the stylet wire 12 by struc-ture known in the art. For purposes of clarity in the drawings for illustrating the distal end and proximal end of the stylet wire 12, the stylet wire is broken as illustrated in the figure. Bal] 18 is affixed to a distal end 20 of the taper 14 by processes known in the art, such as by welding.
Taper 14 is a gradual taper from junction 22 of the diameter of the wire where the taper begins to the distal end 20 of the stylet wire 12 at which point the ball 18 is secured to the distal end 20. Taper 14 can be formed such as by centerless grinding or a drawn process by way of example and for purposes of illustration only. The length of the taper 14 is predetermined by a number of factors, such as the diameter of the stylet wire, the spring constant of the stylet wire, the particular application of the stylet for use in a transvenous pacing lead to a heart appendage, and other considerations as dictated by the medical factors. The length of the taper 14 can vary in the range of a couple inches, such as three or four, to a quarter of an inch over the length of the taper 14. By way of example and for purposes of illustration, the taper 14 has been shown to extend over one-half inch of the distal end of the stylet wire 12.
The diameter of the ball 18 is considered to be the same diameter as the dia-meter of the stylet wire, but may range in size to be more or less than the dia-meter of the stylet wire 12.
...- , , 5~
FIGURE 2, which illustrates an exploded plan view of the distal end of the stylet wire, shows the stylet wire 12 having a diameter of .014 inches, a taper from the junction 22 down to the distal end 20 of .014 to .008 inches, al-though the .008 inches could be in ~he range of .01 to .006 or less or, alter-natively as great as .009 to .013 and the diameter of the ball 18 is substant-ially equal to the diameter of stylet wire 12, .014 inches.
The stylet 10 of the present invention can be inserted into a trans-venous pacing lead before the transvenous pacing lead is passed through a vein, or in the alternative, stylet 12 can be inserted into the transvenous pacing lead on initial passing of the transvenous pacing lead through a vein or after the distal end of the lead has been placed within the body. The ball 18 pro-vides smooth insertion of the stylet 12 within a transvenous pacing lead without the concern of the distal end of the stylet wire 12 violating the wound coil of the transvenous pacing lead or protruding through the insulation of the trans-- venous pacing lead. The distal end of the stylet 12, especially over the length of the taper 14, provides a soft tip which complies with the curvature and bends of the transvenous pacing lead, allowing for easy insertion and control around the curves and bends of the lead.
FIGURE 3 is an exploded plan view of a distal end for an alternative embodiment of a stylet 30, which includes a stylet wire 32 having a constant diameter, the proximal end of which connects to a stylet handle as previously described for FIGURES 1 and 2 and not illustrated for purposes of clarity in the drawing and having a taper 34 running from the junction 36 of the constant dia-meter of the stylet wire 32 and the taper 34 to a junction 38 of the end of the taper 34 of the stylet wire 32 and a wire 40 of constant diameter. A ball 42 of a diameter substantially equal to the diameter of the stylet wire 32 affixes to the distal end of the constant diameter wire 40. As previously described and by :, way of example and for purposes of illustration only, the diameter of the stylet wire 32 can be .014 inches, the taper can occur three-quarters of the length of the stylet wire from the junction 36, such as from .014 inches to .008 inches, to the ball 42 and remaining wire 40 can be of constant diameter of .008 inches by l~ay of example and for purposes of illustration only while the constant dia-meter wire 40 can be in the last one-quarter of the length of the distal end from junction 36 to ball 42. The numerical diameters and length are by way of example and for purposes of illustration only in illustrating an operative alternative embodiment of the present invention, and can be varied depending upon the particular medical application, and are not to be construed as limiting of the presen~ invention.
Various modifications can be made to the stylet of the present inven-tion without departing from the apparent scope of the present invention.
Claims (12)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A stylet for guiding implantation of a transvenous pacing lead wherein said stylet has a wire with a knob at a proximal end, characterized in that the distal portion of said wire is more flexible than a proximal portion, in that a distal tip of said wire has a ball affixed thereto having a diameter substantial-ly equal to the diameter of said stylet wire for preventing perforation of said pacing lead, and in that said stylet is provided with a taper intermediate said proximal end and said ball.
2. A stylet as claimed in claim 1 wherein said distal portion is tapered.
3. A stylet as claimed in claim 2 wherein said taper positions on a mid-portion of said distal end of said stylet wire.
4. A stylet as claimed in claim 2 or 3 wherein said ball and said stylet have a diameter of the order of .014 inches.
5. A stylet as claimed in claim 2 or 3 wherein said ball and said stylet have a diameter of the order of .014 inches and said distal portion is tapered from .014 to .008 inches.
6. A stylet as claimed in claim 2 or 3 wherein said ball and said stylet have a diameter of the order of .014 inches and said distal portion is tapered from .014 inches to a range of .006 to .01 inches.
7. A stylet as claimed in claim 2 or 3 wherein said ball and said stylet have a diameter of the order of .014 inches and said distal portion is tapered from .014 inches to a range of .009 to .013 inches.
8. A stylet as claimed in claim 2 wherein said distal portion is tapered from a range of .014 to .006 inches to a range of .013 to .006 inches.
9. A stylet as claimed in claim 2 wherein said distal portion is tapered over a length of four inches to one-quarter inch.
10. A stylet as claimed in claim 3 wherein said tapered portion of said stylet wire joins a distal end of small constant diameter.
11. A stylet as claimed in claim 10 wherein said midportion taper occurs over three-quarters the length of said distal end of said stylet wire and said small constant diameter portion occurs over one-quarter the length of the distal end.
12. A stylet as claimed in claim 10 wherein said small constant diameter is .008 inches.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10324979A | 1979-12-13 | 1979-12-13 | |
| US103,249 | 1979-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1150580A true CA1150580A (en) | 1983-07-26 |
Family
ID=22294178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000366671A Expired CA1150580A (en) | 1979-12-13 | 1980-12-12 | Stylet |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS617684Y2 (en) |
| CA (1) | CA1150580A (en) |
| DE (1) | DE3046691A1 (en) |
| FR (1) | FR2471790A3 (en) |
| GB (1) | GB2064963B (en) |
| NL (1) | NL8006752A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10327862B2 (en) | 2014-09-17 | 2019-06-25 | Covidien Lp | Fiducial marker deployment system |
| US10485583B2 (en) | 2015-10-07 | 2019-11-26 | Covidien Lp | Endoscopic ultrasound fine needle fiducial system |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4496347A (en) * | 1982-09-24 | 1985-01-29 | Viridian, Inc. | Feeding tube stylet |
| DE3507119A1 (en) * | 1985-02-28 | 1986-08-28 | Siemens AG, 1000 Berlin und 8000 München | ADJUSTABLE ENDOCARDIAL ELECTRODE ARRANGEMENT |
| FR2583985B1 (en) * | 1985-06-27 | 1988-08-05 | Nivarox Sa | STYLET FOR ELECTRODE IMPLANTABLE IN THE BODY |
| US5160325A (en) * | 1986-10-06 | 1992-11-03 | C. R. Bard, Inc. | Catheter with novel lumens shapes |
| CA2087335C (en) * | 1990-07-19 | 1997-09-16 | Eugene Francis Schrader | Enteral feeding tube |
| US5242389A (en) * | 1990-07-19 | 1993-09-07 | Sherwood Medical Company | Enteral feeding tube enteral feeding tube with separate stylet lumen |
| US5383901A (en) * | 1993-10-18 | 1995-01-24 | Ethicon, Inc. | Blunt point needles |
| DE10017147C2 (en) * | 2000-04-03 | 2003-06-12 | Wolfram Voelker | Washable guidewire for a catheter |
| JP4907945B2 (en) * | 2004-11-01 | 2012-04-04 | テルモ株式会社 | Medical guidewire |
| AU2013232168B2 (en) * | 2012-03-13 | 2017-07-20 | Smith & Nephew, Inc. | Surgical needle |
| AU2014227806A1 (en) | 2013-03-15 | 2015-10-01 | Smith & Nephew, Inc. | Surgical needle |
| AU2015333781A1 (en) | 2014-10-15 | 2017-04-27 | Smith & Nephew, Inc. | Anchor/ implant deployment device and tissue repair methods relate thereto |
| EP3258855B1 (en) | 2015-02-17 | 2020-04-08 | Smith & Nephew, Inc | Anchor insertion system |
| CN114901340A (en) | 2020-10-01 | 2022-08-12 | 泰利福医疗公司 | Probe with improved threading capability |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3348548A (en) * | 1965-04-26 | 1967-10-24 | William M Chardack | Implantable electrode with stiffening stylet |
| US3521620A (en) * | 1967-10-30 | 1970-07-28 | William A Cook | Vascular coil spring guide with bendable tip |
| US3827434A (en) * | 1972-06-21 | 1974-08-06 | Vicra Sterile Inc | Catheter insertion device |
| JPS5637698Y2 (en) * | 1977-12-15 | 1981-09-03 | ||
| JPS5594265A (en) * | 1979-01-05 | 1980-07-17 | Medtronic Inc | Stylet* whose flexible nose is strengthened *used with intestine stud lead |
| JPS55116358A (en) * | 1979-02-08 | 1980-09-06 | Toray Monofilament Co | Flow guide wire for medical treatment |
-
1980
- 1980-12-10 JP JP1980177492U patent/JPS617684Y2/ja not_active Expired
- 1980-12-11 DE DE19803046691 patent/DE3046691A1/en not_active Ceased
- 1980-12-12 FR FR8026389A patent/FR2471790A3/en active Granted
- 1980-12-12 GB GB8039834A patent/GB2064963B/en not_active Expired
- 1980-12-12 CA CA000366671A patent/CA1150580A/en not_active Expired
- 1980-12-12 NL NL8006752A patent/NL8006752A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10327862B2 (en) | 2014-09-17 | 2019-06-25 | Covidien Lp | Fiducial marker deployment system |
| US10485583B2 (en) | 2015-10-07 | 2019-11-26 | Covidien Lp | Endoscopic ultrasound fine needle fiducial system |
| US11382661B2 (en) | 2015-10-07 | 2022-07-12 | Covidien Lp | Endoscopic ultrasound fine needle fiducial system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2064963A (en) | 1981-06-24 |
| JPS56101305U (en) | 1981-08-10 |
| FR2471790B3 (en) | 1981-10-16 |
| GB2064963B (en) | 1984-06-13 |
| DE3046691A1 (en) | 1981-09-10 |
| FR2471790A3 (en) | 1981-06-26 |
| NL8006752A (en) | 1981-07-16 |
| JPS617684Y2 (en) | 1986-03-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |