 Methods for conducting electron beam lithography |
| I claim: 1. An article of manufacture comprising a substrate having a polymeric resist thereon, ... |
|
| Optimal pulse defibrillator |
| OF THE PREFERRED EMBODIMENTS FIG. 1A illustrates a particular voltage-time waveform 10 of a ... |
|
| Convertible thermal blanket |
| In accordance with the invention, an inflatable, self-erecting thermal blanket includes one or more ... |
|
| Second stage scuba diving regulator |
| In the present invention, when the second stage regulator thereof is unpressurized, such as in ... |
|
| Microwave hyperthermia probe |
| OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a microwave probe 10 is constructed from a ... |
|
| Steerable catheter with rotatable tip electrode and method of use |
| Accordingly, it is an object of the present invention in one of its aspects to provide an improved ... |
|
| Apparatus for manually forming containers into portable packs |
| OF THE EMBODIMENT As illustrated in FIG. 3, a paperboard carrier blank 2 is laid onto a base 1 ... |
|
|
Multiple electrode deployable lead
| Details |
Inventors: Bush, Mary E.; Mar, Craig E.; Fain, Eric S.;
Assignee: Ventritex, Inc. (Sunnyvale, CA)
Primary Examiner: Kamm; William E.
Assistant Examiner: Getzow; Scott M.
Attorney, Agent or Firm: Mitchell; Steven M., Meltzer; Mark J.
An implantable defibrillator lead comprises a flexible, conductive lead member having proximal and distal end portions. The distal end portion defines a plurality of separate, curvilinear electrodes which naturally extend laterally outwardly in a curved arrangement from the remainder of the lead. However, by desired means, the curvilinear electrodes may be temporarily extended out straight, substantially parallel to the axis of the remainder of said lead member, to facilitate implantation of the lead. This may be preferably accomplished by a flexible sheath that encloses the lead member in longitudinally slidable relation. |
|
DETAILED DESCRIPTION That which is claimed is: 1.
An implantable defibrillator lead which comprises: a flexible, conductive lead member having proximal and distal and portions; a sheath enclosing said lead member in longitudinally slidable relation, whereby a distal end portion of said lead member is enclosed in said sheath in a first sliding position, and said distal end portion projects from the distal end of said sheath in a second sliding position, said distal end portion defining a plurality of separate, curvilinear defibrillation electrodes which straighten to fit into said sheath in the first position, and which deploy laterally outwardly in a curved arrangement from the remainder of said lead in the second position, said electrodes each comprising a coiled metal wire having an axis extending in a curvilinear direction.
2.
The lead of claim 1 wherein the electrodes are made of multifilar coil.
3.
The lead of claim 1 wherein each electrode is made of coaxial inner and outer coils, the inner coil being for shape memory and mechanical strength and the outer coil for corrosion resistance.
4.
The lead of claim 1 in which said sheath comprises an electrically insulating material.
5.
The lead of claim 1 in which said curvilinear electrodes comprise a platinum-iridium alloy.
6.
The lead of claim 1 wherein said electrodes comprise essentially 35 weight percent nickel, weight percent cobalt, 20 weight percent chromium and weight percent molybdenum.
7.
The lead of claim 1 wherein each electrode has a retaining member running along its length to keep the electrode intact in case of breakage.
8.
The lead of claim 1 wherein the electrodes are covered with a corrosion resisting material.
9.
The lead of claim 8 wherein the corrosion resisting material is iridium oxide.
10.
The lead of claim 1 further comprising a fixation device adjacent the distal end portion.
11.
The lead of claim 10 with a screw-in distal end portion for fixation.
12.
The lead of claim 10 having a distal end portion with a passive fixation device intended to be caught on trabeculae to hold the lead in place
|
| Related patents |
|
|
Method and apparatus for converting a modulated optical signal to an electrical signal with correction for modulation jitter
OF A PREFERRED EMBODIMENT Referring now to FIG. 1, there is shown the typical response of a lead-sulfide photodetector, as a ratio of electrical signal out to light ...
|
|
|
Process and device to reduce interstitial fluid pressure in tissue
An object of the present invention is to provide a new mechanical approach to decrease IFP, and/or facilitate clearing of interstitial fluid when such clearing is ...
|
|
|
Electrosurgical loop electrode instrument for laparoscopic surgery
There is, therefore, provided according to the present invention, an electrosurgical loop electrode instrument for excising cervical tissue in an efficient and ...
|
|
|
Screw for lumbar-sacral fixator
The pedicular screw according to the invention comprises a threaded part and a semi-spherical head which is provided with a notched surface inclined with respect to the ...
|
|
|
Spinal osteosynthesis device
An object of the present invention is therefore to provide an improvement in devices of the above-outlined type and to offer a solution for adjustment of the implants in ...
|
|
|
Medical electrode and method
In general, it is an object of the present invention to provide a medical electrode and method which can be readily manufactured. Another object of the invention is to ...
|
|
|
Iontophoretic electrode
Accordingly, it is an object of the present invention to provide an iontophoretic device useful for evaluating the penetration, absorption, and toxicity of compositions ...
|
|
|
Connector block with solderless, non-screwed and stripping-free terminals having a polytropic air gap for terminating communication cables and dropwire cables
We claim: 1. A connector block with solderless, non-screwed and stripping-free terminals having a polytropic air gap for terminating communication cables, comprising a ...
|
|
|
Circuit interrupter with cause for trip indication
It is a primary object of the present invention to provide a circuit interrupter which provides an indication of the cause of trip in a circuit breaker which includes an ...
|
|
|
Bone assessment apparatus and method
This invention has been made to overcome the aforesaid problems in the conventional bone assessment apparatus. Therefore the object of the present invention is to ...
|
|
|
Obesity Surgery 
