Patent US5769843A successfully refreshed from Google Patents.
US5769843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percutaneous endomyocardial revascularization
Assignee: Cormedica Corp
•
Filing: 1996-02-20
•
Granted: 1998-06-23
•
Expires: 2016-02-20
Abstract
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.
Inventors
- 👤 George S. Abela
- 👤 Russell W. Bowden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:47
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B34/00; A61B34/20; A61B5/00; A61B5/06; A61B5/061; A61B5/062; A61B17/00; A61B17/22; A61B17/22004; A61B17/22012; A61B2017/00017; A61B2017/00022; A61B2017/00039; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2017/00247; A61B2017/00681; A61B2017/00694; A61B2017/00699; A61B2017/00703; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00392; A61B2018/2005; A61B34/10; A61B2034/101; A61B2034/105; A61B2034/2046; A61B2034/2051; A61B34/25; A61B2034/256; A61B90/00; A61B90/36; A61B90/37; A61B2090/376; A61B90/39; A61B2090/3954; A61B2090/3958
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
114 words
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.
Claim 2
Independent Claim
114 words
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.
Claim 3
Dependent Claim
15 words
The system for percutaneous myocardial revascularization of claim 1 wherein the applicator applies electromagnetic energy.
Claim 4
Dependent Claim
15 words
The system for percutaneous myocardial revascularization of claim 2 wherein the applicator applies laser energy.
Claim 5
Dependent Claim
29 words
The system for percutaneous myocardial revascularization of claim 3 wherein the applicator includes a beam controller operable to receive the laser energy and selectively direct it in different directions.
Claim 6
Dependent Claim
23 words
The system for percutaneous myocardial revascularization of claim 3 wherein the applicator applies laser energy in the form of a plurality of beams.
Claim 7
Dependent Claim
32 words
The system of claim 3 wherein the catheter includes an outer catheter and an optical fiber for carrying the revascularizing laser energy, the optical fiber slidably mounted relative to the outer catheter.
Claim 8
Dependent Claim
82 words
The system for percutaneous myocardial revascularization of claim 6 wherein the navigation device includes a magnetic element and further comprising a plurality of external magnetic elements for placement outside of the patient and a computer operably connected to the plurality of external magnetic elements and operably connected to the navigation device, and wherein the computer is operable to sense the position of the distal end by way of magnetic field interaction between the plurality of external magnetic elements and the navigation device.
Claim 9
Dependent Claim
30 words
The system for percutaneous myocardial revascularization of claim 1 wherein the navigation device is operable to provide sensing of the position of the distal end by use of magnetic fields.
Claim 10
Dependent Claim
18 words
The system for percutaneous myocardial revascularization of claim 8 wherein the navigation device includes two non-coplanar magnetic elements.
Claim 11
Dependent Claim
73 words
The system for percutaneous myocardial revascularization of claim 8 further comprising a plurality of external magnetic elements for placement outside of the patient and a computer operably connected to the plurality of external magnetic elements and operably connected to the navigation device, and wherein the computer is operable to sense the position of the distal end by way of magnetic field interaction between the plurality of external magnetic elements and the navigation device.
Claim 12
Dependent Claim
24 words
The system for percutaneous myocardial revascularization of claim 10 wherein the external magnetic elements establish magnetic fields which are sensed by the navigation device.
Claim 13
Dependent Claim
27 words
The system for percutaneous myocardial revascularization of claim 8 wherein the applicator applies laser energy and the navigation device is a sensor operable to sense magnetic fields.
Claim 14
Dependent Claim
23 words
The system of claim 1 wherein the catheter includes an outer catheter and an optical fiber slidably mounted relative to the outer catheter.
Claim 15
Independent Claim
89 words
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 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.
Claim 16
Independent Claim
89 words
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 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.
Claim 17
Dependent Claim
16 words
The system for percutaneous myocardial revascularization of claim 14 wherein the applicator applies revascularizing laser energy.
Claim 18
Dependent Claim
21 words
The system for percutaneous myocardial revascularization of claim 15 wherein the navigation device is a sensor operable to sense magnetic fields.
Claim 19
Dependent Claim
18 words
The system for percutaneous myocardial revascularization of claim 15 wherein the navigation device includes two non-coplanar magnetic elements.
Claim 20
Dependent Claim
73 words
The system for percutaneous myocardial revascularization of claim 15 further comprising a plurality of external magnetic elements for placement outside of the patient and a computer operably connected to the plurality of external magnetic elements and operably connected to the navigation device, and wherein the computer is operable to sense the position of the distal end by way of magnetic field interaction between the plurality of external magnetic elements and the navigation device.
Claim 21
Dependent Claim
26 words
The system for percutaneous myocardial revascularization of claim 18 wherein the plurality of external magnetic elements establish magnetic fields which are sensed by the navigation device.
Claim 22
Dependent Claim
56 words
The system for percutaneous myocardial revascularization of claim 19 wherein the plurality of external magnetic elements establish different magnetic fields sequentially, the navigation device is operable to sense the different fields, and the computer is operable to determine distal end position by comparing the sensed fields with a known sequence of establishing the different magnetic fields.
Claim 23
Dependent Claim
30 words
The system for percutaneous myocardial revascularization of claim 20 wherein the plurality of external magnetic elements are three sets of three coils, each set of three coils being sequentially energized.
Claim 24
Dependent Claim
33 words
The system for percutaneous myocardial revascularization of claim 15 wherein the distal end includes a side wall with a hole therein and the applicator includes a lens directing laser energy out the hole.
Claim 25
Dependent Claim
29 words
The system for percutaneous myocardial revascularization of claim 15 wherein the applicator includes a beam controller operable to receive the laser energy and selectively direct it in different directions.
Claim 26
Dependent Claim
23 words
The system for percutaneous myocardial revascularization of claim 15 wherein the applicator applies laser energy in the form of a plurality of beams.
Claim 27
Dependent Claim
32 words
The system of claim 15 wherein the catheter includes an outer catheter and an optical fiber for carrying the revascularizing laser energy, the optical fiber slidably mounted relative to the outer catheter.
Claim 28
Dependent Claim
82 words
The system for percutaneous myocardial revascularization of claim 25 wherein the navigation device includes a magnetic element and further comprising a plurality of external magnetic elements for placement outside of the patient and a computer operably connected to the plurality of external magnetic elements and operably connected to the navigation device, and wherein the computer is operable to sense the position of the distal end by way of magnetic field interaction between the plurality of external magnetic elements and the navigation device.
Claim 29
Dependent Claim
23 words
The system of claim 14 wherein the catheter includes an outer catheter and an optical fiber slidably mounted relative to the outer catheter.
Claim 30
Independent Claim
127 words
A method of treating a patient comprising the steps of; 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.
Claim 31
Independent Claim
127 words
A method of treating a patient comprising the steps of; 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.
Claim 32
Dependent Claim
18 words
The method of claim 28 wherein the applying step includes applying revascularizing laser energy to the heart tissue.
Claim 33
Dependent Claim
44 words
The method of claim 29 wherein the catheter includes an outer catheter and an optical fiber slidable within the outer catheter, and, prior to the applying of revascularizing laser energy, the optical fiber is slid in a distal direction relative to the outer catheter.
Claim 34
Dependent Claim
65 words
The method of claim 30 wherein the catheter further includes an inner catheter and the optical fiber is mounted in the inner catheter such that the optical fiber and inner catheter are slidable together within the outer catheter, and, prior to the applying of revascularizing laser energy, the inner catheter and optical fiber are slid together in a distal direction relative to the outer catheter.
Claim 35
Independent Claim
111 words
A method of treating a patient comprising the steps of: 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.
Claim 36
Independent Claim
111 words
A method of treating a patient comprising the steps of: 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.
Claim 37
Dependent Claim
18 words
A method of claim 32 wherein the applying step includes applying revascularizing laser energy to the heart tissue.
Claim 38
Dependent Claim
44 words
The method of claim 33 wherein the catheter includes an outer catheter and an optical fiber slidable within the outer catheter, and, prior to the applying of revascularizing laser energy, the optical fiber is slid in a distal direction relative to the outer catheter.
Claim 39
Dependent Claim
65 words
The method of claim 34 wherein the catheter further includes an inner catheter and the optical fiber is mounted in the inner catheter such that the optical fiber and inner catheter are slidable together within the outer catheter, and, prior to the applying of revascularizing laser energy, the inner catheter and optical fiber are slid together in a distal direction relative to the outer catheter.
References Cited (Backward Citations)
US4176662A
Cited
US4592364A
Cited
US5496305A
Cited
US4913142A
Cited
US4658817A
Cited
US4693556A
Cited
US4936304A
Cited
US4941473A
Cited
US5041109A
Cited
US4860743A
Cited
US5207103A
Cited
US5188635A
Cited
US5061265A
Cited
US5056517A
Cited
US5377683A
Cited
US5570671A
Cited
US5109859A
Cited
US5201729A
Cited
US5380316A
Cited
US5554152A
Cited
US5389096A
Cited
US5607421A
Cited
US5285795A
Cited
US5345940A
Cited
US5423805A
Cited
US5468239A
Cited
US5480422A
Cited
US5568809A
Cited
US5443489A
Cited
US5546951A
Cited
US5391199A
Cited
US5496307A
Cited
US5464404A
Cited
US5558091A
Cited
US5496309A
Cited
WO1996005768A1
Cited
US5592939A
Cited
WO1997025101A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |