EP0709111A2
Expired / Lapsed
EP
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Medical electrical lead system having a torque transfer stylet
Assignee: Medtronic Inc
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Filing: 1995-07-18
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Granted: —
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Expires: 2015-07-18
Abstract
Abstract A medical electrical lead system having a torque transfer stylet. In a preferred embodiment, the torque transfer stylet comprises an elongated, stylet wire having proximal, intermediate and distal sections. The proximal and distal section of the stylet wire have a first diameter. The intermediate section spans between the proximal and distal sections. The stylet wire in this region, however, has a second diameter, the second diameter smaller than the first diameter of the proximal and distal sections. In addition, the intermediate section further has a length of torque coil wrapped thereabout. The torque coil preferably is wound in a coiled diameter which is the same as the first diameter of the proximal and distal sections of the stylet wire. Through such a configuration the stylet has an overall nearly uniformed diameter through its length.
Inventors
- 👤 James T. Gates
- 👤 Kenneth B. Stokes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 06:19
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/057; A61N1/0573; A61N2001/0578
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
154 words
A body implantable lead system comprising: a lead (10) for electrically communicating with a tissue of a body, the lead (10) having a conductor (12) having a proximal end and a distal end, the conductor having a lumen, the conductor covered between the proximal end and the distal end by an insulative sheath (32), a fixation helix (28,64) positioned at the distal end of the conductor (12), the fixation helix (28,64) having a proximal end and a distal end, the proximal end of the fixation helix having means (22) for receiving a torque; a stylet (24) disposed through the lumen, the stylet (24) having a distal tip, a distal section, an intermediate section and a proximal section, the distal section having a first diameter, the intermediate section having a second diameter, the second diameter being smaller than the first diameter; characterized in that the intermediate section has a torque coil (130) located there about.
Claim 2
Dependent Claim
38 words
The body implantable lead system of claim 1 further comprising the distal section having means (162) for transmitting a torque which corresponds to the means (22) for receiving a torque of the proximal end of the fixation helix.
Claim 3
Dependent Claim
19 words
The body implantable lead system of claim 2 wherein the means for transmitting a torque comprise a screwdriver (162).
Claim 4
Dependent Claim
22 words
The body implantable lead system of claim 1, 2 or 3 wherein the means for receiving a torque comprise a slot (66).
Claim 5
Dependent Claim
21 words
The body implantable lead system of any preceding claim wherein the torque coil (130) is attached to the intermediate section (121).
Claim 6
Dependent Claim
35 words
The body implantable lead system of any preceding claim wherein the torque coil (130) has a center lumen of a third diameter, the third diameter being greater than the second diameter of the intermediate section.
Claim 7
Dependent Claim
24 words
The body implantable lead system of any preceding claim wherein between the intermediate section (121) and the torque coil (130) there is a gap.
Claim 8
Dependent Claim
21 words
The body implantable lead system of any preceding claim wherein the torque coil (130) is directly attached to the intermediate section.
Claim 9
Dependent Claim
41 words
The body implantable lead system of any preceding claim wherein the torque coil (130) has a first end and a second end, the first end is attached to the proximal section and the second end is attached to the distal section.
Claim 10
Dependent Claim
20 words
The body implantable lead system of any preceding claim wherein the torque coil is directly wrapped about the intermediate section.
Claim 11
Dependent Claim
28 words
The body implantable lead system of any preceding claim wherein the torque coil (130) comprises a wire having a circular cross-section, the wire wound into a helical coil.
Claim 12
Dependent Claim
23 words
The body implantable lead system of any preceding claim wherein the torque coil comprises a first helical coil and a second helical coil.
Claim 13
Dependent Claim
30 words
The body implantable lead system of claim 12 wherein the first helical coil is wound in a first direction and the second helical coil is wound in a second direction.
Claim 14
Dependent Claim
27 words
The body implantable lead system of claim 13 wherein the first direction of the first helical coil is opposite the second direction of the second helical coil.
Claim 15
Dependent Claim
25 words
The body implantable lead system of any preceding claim further comprising a sleeve of a high elastic modulus, polymeric material positioned over the torque coil.
Claim 16
Dependent Claim
17 words
The body implantable lead system of claim 15 wherein the high elastic modulus, polymeric material is polyamide.
Claim 17
Dependent Claim
25 words
The body implantable lead system of claim 12 wherein the first helical coil has a diameter less than the first diameter of the distal section.
Claim 18
Dependent Claim
25 words
The body implantable lead system of claim 12 wherein the second helical coil has a diameter greater than the second diameter of the intermediate section.
Claim 19
Dependent Claim
20 words
The body implantable lead system of claim 12 wherein the second helical coil is located around the first helical coil.
Claim 20
Dependent Claim
44 words
The body implantable lead system of claim 1 wherein the intermediate section has a distal end and a proximal end, the distal end of the intermediate section is located between 4mm and 4.5mm (0.160 and 0.180) inches from the distal tip of the stylet.
Claim 21
Dependent Claim
41 words
The body implantable lead system of claim 1 wherein the intermediate section has a distal end and a proximal end, the distal end of the intermediate section is located approximately 10cm (4.0 inches) from the proximal end of the intermediate section.
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