EP0515867A2
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EP
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Myocardial revascularization through the endocardial surface using a laser
Assignee: Columbia University
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Filing: 1992-04-30
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Granted: —
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Expires: 2012-04-30
Abstract
Abstract Myocardial revascularization is performed by an apparatus and method which forms channels in the myocardium from inside the ventricular cavity without penetrating the full thickness of the ventricular wall. A catheter has a fiber optic connected at its handling end to a laser, and terminates at the insertable end of the catheter. A servomotor controls the advancing of the fiber to stop positions relative to the catheter. At each stop position another channel is created. An aiming beam aids in directing the channel forming fiber end to different desired channel positions.
Inventors
- 👤 Valluvan Jeevanandam
- 👤 Craig R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 03:19
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B17/00; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2017/00247; A61B2017/00973; A61B17/22; A61B2017/22072; A61B2017/22074; A61B2017/22075; A61B17/30; A61B2017/306; A61B2017/308; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00392; A61B2018/00636; A61B2018/2015; A61B2018/2025; A61B90/00; A61B90/06; A61B2090/062; A61M; A61M2202/00; A61M2202/04; A61M2202/0468; A61M2202/0478; A61M3/00; A61M3/02; A61M3/0279
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
124 words
A myocardial revascularization device, comprising: a handpiece having at least one lumen, and having an insertable end and a handling end; a fiber for carrying energy from an energy source to a fiber end from which the energy is emitted, said fiber being received in one of said lumens; means for moving the fiber within the lumen to different stop positions, whereby the fiber end extends from the handpiece insertable end at different sites of a ventricular wall corresponding to said stop positions; and means for transmitting energy to said fiber end in an amount sufficient to form a channel in the ventricular wall into the myocardium at each of said sites, to thereby increase myocardial blood flow from the endocardium to the myocardium.
Claim 2
Dependent Claim
33 words
The myocardial revascularization device according to claim 1, wherein said means for moving the fiber comprises means for moving the fiber within the lumen to different stop positions each a selected distance apart.
Claim 3
Dependent Claim
17 words
The myocardial revascularization device according to claim 1, wherein the means for transmitting energy comprises a laser.
Claim 4
Dependent Claim
18 words
The myocardial revascularization device according to claim 1, wherein the handpiece further comprises means for supplying medicinal fluid.
Claim 5
Dependent Claim
21 words
The myocardial revascularization device according to claim 4, wherein the means for supplying comprises means for supplying medicinal fluid under pressure.
Claim 6
Dependent Claim
14 words
The myocardial revascularization device according to claim 5, wherein the medicinal fluid is heparin.
Claim 7
Dependent Claim
36 words
The myocardial revascularization device according to claim 1, wherein the means for moving the fiber comprises servomotor means for moving the fiber a selected distance, and further comprising a foot switch to activate the servomotor means.
Claim 8
Dependent Claim
23 words
The myocardial revascularization device according to claim 1, wherein the handpiece insertable end includes gripping means extending therefrom to grip a ventricular wall.
Claim 9
Dependent Claim
16 words
The myocardial revascularization device according to claim 8, wherein the gripping means comprises three suction cups.
Claim 10
Dependent Claim
110 words
A myocardial revascularization device, comprising: a channel forming energy emitter means, for insertion into the ventricle cavity of a heart, for emitting energy to form at least one channel in the ventricular wall into the myocardium; an aiming beam energy emitter means for emitting an aiming beam which identifies the location of energy emitted from the channel forming energy emitter means; an aiming beam energy detector, for placing against the exterior of the heart, for detecting an aiming beam from the aiming beam energy emitter means; and means for energizing the channel forming energy emitter means in response to detection of an aiming beam by the aiming beam energy emitter.
Claim 11
Dependent Claim
20 words
The myocardial revascularization device according to claim 10, wherein the aiming beam energy detector comprises an array of detector elements.
Claim 12
Dependent Claim
57 words
The myocardial revascularization device according to claim 11, wherein the means for energizing comprises control means for receiving an EKG signal from a patient, and wherein the channel forming energy emitter means is energized in response to detection of an aiming beam by the aiming beam energy emitter and at a suitable time in the EKG cycle.
Claim 13
Dependent Claim
46 words
The myocardial revascularization device according to claim 11, further comprising: a magnetic element on the channel forming energy emitter means, and an electromagnet on the aiming beam energy detector, for electromagnetically coupling the channel forming energy emitter and detector, for stabilizing the channel forming energy emitter.
References Cited (Backward Citations)
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