EP0480101B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heart assist pump
Assignee: American Biomed Inc
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Filing: 1990-10-09
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Granted: 1996-05-15
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Expires: 2010-10-09
Abstract
Abstract A temporary circulatory assist pump (14) is disclosed for implantation in the heart of a patient through the femoral artery. The pump (14) is driven by a flexible drive shaft (30) extending through a catheter (16) and being connected to a power source outside the body of the patient. The pump (14) utilises the moineau pumping principle to pump blood at a rate of approximately three to four liters per minute through the circulatory system of the patient. <IMAGE>
Inventors
- 👤 David P. Summers
- 👤 Jeddy D. Nixon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:17
CPC Classifications
F; F04; F04C; F04C13/00; F04C13/001; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/13; A61M60/20; A61M60/205; A61M60/216; A61M60/237; A61M60/247; A61M60/253; A61M60/40; A61M60/403; A61M60/408; A61M60/411; A61M60/414; A61M60/424; A61M60/438; A61M60/441; A61M60/80; A61M60/835; A61M60/148; F04C2/00; F04C2/08; F04C2/10; F04C2/107; F04C2/1071
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
209 words
A temporary circulatory assist pump, comprising: (a) an elongate, cylindrical housing (36) having at least one intake port (38) and at least one discharge port (58), said housing (36) being sized for passage through a human blood vessel (18) and insertion into a heart (12) (b) pump means (14), including a stator (40) and a rotor (42), within said housing for assisting the heart of a patient to pump blood; (c) said housing (36) including discharge means (34) for discharging blood into the vascular system of the patient; (d) extravascular power means (31) connected to said pump means (14) for driving said rotor (42); and (e) drive shaft means (30) connecting said pump means (14) to said power means (31); characterised in that said pump means is a moineau type pump means, said rotor (42) having a single helix shape whereby orbiting motion of the rotor (42) moves a rotating seal formed by contact between the stator and the helical rotor continuously through the stator (40) for pumping of blood therethrough; and said drive shaft means (30) is connected to said rotor (42) by a flexible joint (44) enabling said rotor (42) to move through an orbital path upon rotation of said rotor (42) by said power means (31).
Claim 2
Dependent Claim
36 words
A pump according to claim 1 including a discharge nozzle (46) supported within said housing (36) in line with said stator (40), said discharge nozzle (46) including a restriction for pressurizing and jetting blood pumped therethrough.
Claim 3
Dependent Claim
43 words
A pump according to claim 2 including a venturi tube (48) located within said housing (36) in line with said discharge nozzle (46), said venturi tube (48) cooperating with said discharge nozzle (46) for forming a negative pressure area within said housing (36).
Claim 4
Dependent Claim
63 words
A pump according to claim 3 wherein said housing (36) includes a suction chamber (54) formed about a portion of said discharge nozzle (46) and said venturi tube (48), said suction chamber (54) being in fluid communication with said negative pressure area, said suction chamber (54) further including at least one intake port (56) permitting blood to flow into said suction chamber (54).
Claim 5
Dependent Claim
38 words
A pump according to claim 4 wherein blood collected in said suction chamber (54) is forced through said venturi tube (48) by suction created in the negative pressure area about the discharge end of said discharge nozzle (46).
Claim 6
Dependent Claim
64 words
A pump according to any preceding claim wherein said pump means (14, 60) includes at least two separate intake ports (64, 66, 68) in fluid communication with separate rotor cavities (70, 72, 74) formed in said pump means (14, 60), and wherein said separate cavities (70, 72, 74) include separate exit ports (76, 78, 80) in fluid communication with a common discharge duct (82).
Claim 7
Dependent Claim
31 words
A pump according to claim 6 wherein said separate rotor cavities (70, 72, 74) are separated by at least one shaft stabilizer (84) supporting said rotor (86) within said stator (62).
Claim 8
Dependent Claim
32 words
A pump according to any preceding claim wherein said stator (40) is fabricated of resilient material and said rotor (42) is fabricated of stainless steel and is rotatable within said stator (40).
Claim 9
Dependent Claim
39 words
A pump according to any preceding claim including a suction tube (15) projecting forwardly from said cylindrical housing (36) for insertion into the heart, said suction tube (15) providing a passage for blood flow to said pump means (14).
Claim 10
Dependent Claim
39 words
A pump according to any preceding claim wherein said. cylindrical housing (36) carrying said pump means (14) is mounted to the distal end of a catheter (16) and guided to the heart of a patient by said catheter (16).
References Cited (Backward Citations)
No citation records indexed.
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