Percutaneous endomyocardial revascularization
First Claim
1. A system for percutaneous myocardial revascularization comprising a catheter, the catheter having a proximal end and a distal end, the distal end of the catheter including:
- an applicator for revascularizing energy operable to revascularize a patient'"'"'s heart by creating holes partly through a wall of the heart, the revascularizing energy being non-mechanical energy;
a navigation device operable to provide sensing of the position of the distal end and having wires for carrying navigation signals between the navigation device and the proximal end, the navigation device referencing the distal end relative to a frame of reference external to the patient; and
a pressure sensor operable to sense ventricular pressure during revascularization of a patient'"'"'s heart.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method for percutaneous myocardial revascularization uses laser energy emitted from the distal end of a catheter. A technique for controlling beam direction allows the creation of channels in a patient'"'"'s heart tissue with the channels having different orientations relative to the distal end. An arrangement provides for the creation of a plurality of channels at one time by simultaneous application of a plurality of beams of laser energy. A navigation arrangement uses two non-coplanar magnetic sensing coils in the distal end of the catheter cooperating with three sets of three magnetic field generating external coils (i.e., external to the patient). Each of the three sets is sequentially energized and the sensing coils in the distal end sense the magnetic fields established. A computer compares the sensed fields with the known sequence of energizing the external coils and thereby determines the position of the distal end. A pressure sensor in the catheter senses ventricular pressure in the patient'"'"'s heart during and immediately after revascularization.
545 Citations
35 Claims
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1. A system for percutaneous myocardial revascularization comprising a catheter, the catheter having a proximal end and a distal end, the distal end of the catheter including:
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an applicator for revascularizing energy operable to revascularize a patient'"'"'s heart by creating holes partly through a wall of the heart, the revascularizing energy being non-mechanical energy; a navigation device operable to provide sensing of the position of the distal end and having wires for carrying navigation signals between the navigation device and the proximal end, the navigation device referencing the distal end relative to a frame of reference external to the patient; and a pressure sensor operable to sense ventricular pressure during revascularization of a patient'"'"'s heart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for percutaneous myocardial revascularization comprising a catheter, the catheter having a proximal end and a distal end, the distal end of the catheter including:
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an applicator for applying revascularizing energy operable to revascularize a patient'"'"'s heart by creating holes partly through a wall of the heart, the revascularizing energy being non-mechanical energy; and a navigation device operable to provide sensing of the position of the distal end using magnetic fields, the navigation device referencing the distal end relative to a frame of reference external to the patient. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of treating a patient comprising the steps of;
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percutaneously inserting a catheter in a patient, the catheter having a proximal end and a distal end; sensing the position of the distal end using magnetic fields and a navigation device in the distal end; using the navigation device to reference the distal end relative to a frame of reference external to the patient positioning the catheter such that its distal end is adjacent patient tissue which is to be revascularized; applying revascularizing energy from an applicator disposed at the distal end to the patient tissue, the revascularizing energy being non-mechanical energy which creates holes partly through a wall of the heart; and sensing pressure at the distal end using a pressure sensor in the distal end. - View Dependent Claims (29, 30, 31)
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32. A method of treating a patient comprising the steps of:
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percutaneously inserting a catheter in a patient, the catheter having a proximal end and a distal end; sensing the position of the distal end using magnetic fields and a navigation device in the distal end, the navigation device referencing the distal end relative to a frame of reference external to the patient; positioning the catheter such that its distal end is adjacent heart tissue which is to be revascularized; and applying revascularizing energy from an applicator disposed at the distal end to the heart tissue, the revascularizing energy being non-mechanical energy which creates holes partly through a wall of the heart. - View Dependent Claims (33, 34, 35)
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Specification