EP0280225A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A vein drain cannula
Assignee: CARDIOSISTEMI SpA
•
Filing: 1988-02-22
•
Granted: —
•
Expires: 2008-02-22
Abstract
Abstract A vein drain cannula for extracorporal circulation, of the type to be inserted into the superior vena cava and/or the inferior vena cava during surgical operation on heart, wherein the cannula has a balloon (6) which surrounds a portion of the cannula in proximaty to one end (4) thereof, and which can be inflated from the outside to provide for partial or total occlusion of the lumen in a vena cava (13) thereby to obtain partial or total cardiopulmonary bypass.
Inventors
- 👤 Roberto Parravicini
- 👤 Alessandro Verona
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 00:27
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1002; A61M25/0043; A61M25/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A vein drain cannula for extracorporal circulation, of the type to be inserted into the superior vena cava and/or the inferior vena cava in order to provide for total or partial cardiopulmonary bypass during heart operation, characterized in that the cannula has a balloon (6) provided in proximity of the cannula end (4) intended for insertion into a vena cava, which balloon (6) can be inflated from the outside to occlude, in toto or in part, the lumen in the vena cava (13).
Claim 2
Dependent Claim
83 words
A vein drain cannula for extracorporal circulation, of the type to be inserted into the superior vena cava and/or the inferior vena cava in order to provide for total or partial cardiopulmonary bypass during heart operation, characterized in that the cannula has a balloon (6) provided in proximity of the cannula end (4) intended for insertion into a vena cava, which balloon (6) can be inflated from the outside to occlude, in toto or in part, the lumen in the vena cava (13).
Claim 3
Dependent Claim
65 words
The vein drain cannula according to claim 1, wherein said balloon (6) surrounds a portion of the cannula (1) and when in inflated condition the balloon takes a heart-shaped profile, the front part (14) of the balloon which is directed towards said cannula end (4) showing a steeper slope than the rear part (15) of the balloon which is away from said cannula end (4).
Claim 4
Dependent Claim
40 words
The vein drain cannula according to claim 2, wherein the balloon (6), when in inflated state, acts with greatest pressure upon the inner wall of the vena cava (13) at the level of an intermediate circomference (16) of the balloon.
Claim 5
Dependent Claim
22 words
The vein drain cannula according to claim 3, wherein transverse crimp formations (17) are formed over the outer surface of balloon (6).
Claim 6
Dependent Claim
77 words
The vein drain cannula according to any of the preceding claims, wherein a channel (7) is formed in the thickness of wall (2) of cannula (1) and opens at one end thereof into the inside of balloon (6) via an outlet port (8), the channel (7) being connected at its other end to a nonreturn valve (10), which valve (10) permits air to be injected therethrough as by means of a syringe, to inflate the balloon (6).
Claim 7
Dependent Claim
39 words
The vein drain cannula according to claim 5, wherein a second balloon (11) is arranged on a connection between channel (7) and valve (10) and is intended for manual and visual control of the inflation state of balloon (6).
Claim 8
Dependent Claim
37 words
The vein drain cannula according to any of the preceding claims, wherein that end (4) of the cannula which is to be inserted into a vena cava (13) is cut to the shape of a flute mouthpiece.
Claim 9
Dependent Claim
35 words
The vein drain cannula according to any of the preceding claims wherein holes (5) are formed in that portion of the cannula wall (2) which extends from the cannula end (4) to the balloon (6).
Claim 10
Dependent Claim
44 words
The vein drain cannula according to any of the preceding claims, wherein the cannula is strengthened at least over a part along its length by means of a wire which is built in the thickness of the cannula wall (2) into helically wound form.
Claim 11
Dependent Claim
21 words
The vein drain cannula according to any of the preceding claims, wherein the cannula is obtained from polyvinyl chloride (PVC) material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.