US20030171802A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venous valve and graft combination
Assignee: Individual
•
Filing: 2002-03-05
•
Granted: —
•
Expires: 2022-03-05
Abstract
Abstract A synthetic venous valve and graft combination that exerts no radial force at the valve site is disclosed. The trilobed valve ( 11 ) is passively actuated by venous blood pressure changes. When open, the aperture for blood flow is approximately that of the original vein. The prosthesis is useful for replacing nonfunctioning venous valves in the human vasculature.
Inventors
- 👤 John Wilder
- 👤 Aleta Tesar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:39
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2475; A61F2/2412
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
1 . A prosthetic venous valve and graft combination comprising: a. a short tube within a tube, the short tube secured to the outer tube in a line along the circumference that forms three equivalent and approximately parabolic sections, each section forming a lobe of a trilobal valve, whereby the three lobes lie flush against said outer tube with full lumenal aperture during distally higher pressure and closing the vein lumen to blood reflux at proximally higher pressure, passively actuated by venous blood pressure change and vein wall pulsation, and b. said short tube and said outer tube both formed of a compliant synthetic material.
Claim 2
Dependent Claim
105 words
1 . A prosthetic venous valve and graft combination comprising: a. a short tube within a tube, the short tube secured to the outer tube in a line along the circumference that forms three equivalent and approximately parabolic sections, each section forming a lobe of a trilobal valve, whereby the three lobes lie flush against said outer tube with full lumenal aperture during distally higher pressure and closing the vein lumen to blood reflux at proximally higher pressure, passively actuated by venous blood pressure change and vein wall pulsation, and b. said short tube and said outer tube both formed of a compliant synthetic material.
Claim 3
Dependent Claim
58 words
2 . The prosthetic venous valve and graft combination of claim 1 , wherein said short tube and said outer tube both have diameters, D, approximating that of a host vein lumen, the short tube having a length, L, of greater than 0.7 D to 3.0 D, the outer tube having a length of at least 1.0 D.
Claim 4
Dependent Claim
42 words
3 . The prosthetic venous valve and graft combination of claim 1 , wherein vertices of said three lobes of said valve are positioned distally in a host vein and apices of said three lobes are positioned proximally in the host vein.
References Cited (Backward Citations)
US20020177894A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.