US5655548A
Expired / Lapsed
US
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Method for treatment of ischemic heart disease by providing transvenous myocardial perfusion
Assignee: Medtronic Vascular Inc
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Filing: 1996-09-16
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Granted: 1997-08-12
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Expires: 2016-09-16
Abstract
Abstract Methods are provided for use in open surgical and transluminal methods for supplying long-term retrograde perfusion of the myocardium via a conduit disposed between the left ventricle and the coronary sinus. In a first method, an opening is formed between the left ventricle and the coronary sinus, and the coronary ostium is partially occluded using a stent that prevents the pressure in the coronary sinus from exceeding a predetermined value. In an alternative method, a first end of a conduit is inserted transeptally through the right atrium and obliquely into the posterior septal endocardium of the left ventricle via the posterior pyramidal space, while a second end of the conduit is inserted into the coronary sinus via the coronary ostium. A pressure-limiting valve is included in the conduit. In either method, the outlet from the left ventricle to the coronary sinus may include a one-way valve to prevent backflow from the coronary sinus into the left ventricle during cardiac diastole.
Inventors
- 👤 James A. Nelson
- 👤 Ascher Shmulewitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/94; A61B; A61B17/00; A61B17/32; A61B17/320016; A61F2/02; A61F2/04; A61F2/06; A61F2/064; A61F2/24; A61F2/2493; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2017/00247; A61B2017/00252; A61B18/00; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00392; A61F2220/00; A61F2220/0008; A61F2220/0016; A61M; A61M25/00; A61M25/0021; A61M25/0067; A61M25/0074; A61M25/0075
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A method of treating ischemic heart disease by providing long-term retrograde transvenous myocardial perfusion, the method comprising steps of: creating a conduit between a patient's left ventricle and coronary sinus, so that blood flows through the conduit from the left ventricle to the coronary sinus during cardiac systole; partially occluding the patient's coronary ostium; and limiting a peak pressure attained within the coronary sinus by venting blood received from the left ventricle into the patient's right atrium when the pressure attained within the coronary sinus exceeds a predetermined value.
Claim 2
Independent Claim
89 words
A method of treating ischemic heart disease by providing long-term retrograde transvenous myocardial perfusion, the method comprising steps of: creating a conduit between a patient's left ventricle and coronary sinus, so that blood flows through the conduit from the left ventricle to the coronary sinus during cardiac systole; partially occluding the patient's coronary ostium; and limiting a peak pressure attained within the coronary sinus by venting blood received from the left ventricle into the patient's right atrium when the pressure attained within the coronary sinus exceeds a predetermined value.
Claim 3
Dependent Claim
62 words
The method as defined in claim 1 wherein the step of creating the conduit comprises steps of: inserting a cutting instrument into the coronary sinus via the coronary ostium; and actuating the cutting instrument to bore through a wall of the coronary sinus, through the patient's epicardium, myocardium and endocardium to create a passageway between the left ventricle and the coronary sinus.
Claim 4
Dependent Claim
40 words
The method as defined in claim 2 wherein the step of creating the conduit further comprises steps of: transluminally inserting a catheter carrying a stent into the coronary sinus via the coronary ostium; and deploying the stent in the passageway.
Claim 5
Dependent Claim
32 words
The method as defined in claim 3 further comprising a step of providing a stent having a one-way valve that prevents backflow of blood from the coronary sinus to the left ventricle.
Claim 6
Dependent Claim
57 words
The method as defined in claim 1 wherein the step of limiting a peak pressure comprises steps of: providing a plug having a pressure sensitive valve, the pressure sensitive valve opening when the pressure exceeds the predetermined value; transluminally inserting a catheter carrying the plug into the coronary ostium; and deploying the plug in the coronary ostium.
Claim 7
Dependent Claim
90 words
The method as defined in claim 1 wherein the step of creating the conduit comprises steps of: providing a device having a first end, a second end, and a lumen extending therebetween; inserting a cutting instrument into the right atrium; actuating the cutting instrument to create a passageway through the right atrial endocardium and into the left ventricular septal endocardium, the passageway extending through the posterior pyramidal space; implanting the first end of the device in the passageway; and implanting the second end of the device into the coronary ostium.
Claim 8
Dependent Claim
43 words
The method as defined in claim 6 wherein the step of creating the conduit further comprises steps of: inserting the device into a catheter; transluminally inserting the catheter into the right atrium; and deploying the first end of the device in the passageway.
Claim 9
Dependent Claim
50 words
The method as defined in claim 7 wherein the step of creating the conduit further comprises steps of: transluminally inserting a second catheter into the right atrium; capturing the second end of the device with the second catheter; and implanting the second end of the device in the coronary ostium.
Claim 10
Dependent Claim
36 words
The method as defined in claim 6 wherein the step of providing a device further comprises providing a device having a one-way valve that prevents backflow of blood from the coronary sinus to the left ventricle.
Claim 11
Dependent Claim
44 words
The method as defined in claim 6 wherein the step of limiting a peak pressure comprises a step of: during the step of providing a device, providing a pressure sensitive valve that opens into the right atrium when the pressure exceeds the predetermined value.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-11 | 2001-02-10 | 2001-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-11 | 2005-02-10 | 2005-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-11 | 2009-02-10 | 2009-08-12 | $7700.00 | Window Closed / Lapsed |