Patent US3891804A successfully refreshed from Google Patents.
Patent US5628719A successfully refreshed from Google Patents.
US5628719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In vivo mechanical energy source and perfusion pump
Assignee: Boston Scientific Scimed Inc
•
Filing: 1994-11-21
•
Granted: 1997-05-13
•
Expires: 2014-11-21
Abstract
Abstract An in vivo source of mechanical energy is provided in close proximity to its load. In the disclosed embodiments, the mechanical energy source is a miniaturized motor ("micromotor") and the load is a miniaturized perfusion pump located at the distal end of a transluminal catheter. The motor is powerful enough to provide the electrical energy needed by the perfusion pump to fluid, and yet small enough to fit inside a body vessel. A position sensor may be provided for automatically controlling the motor's driving current so that it is corresponds to the applied load. An embodiment of the perfusion pump is also provided in which an external energy source is used. Another embodiment is provided wherein a balloon/pump/miniaturized-motor configuration is provided on a distal end of a catheter.
Inventors
- 👤 Roger Hastings
- 👤 Kenneth Larson
- 👤 Michael Berman
- 👤 Daniel M. Lafontaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:19
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/135; A61M60/20; A61M60/295; A61M60/30; A61M60/31; A61M60/40; A61M60/424; A61M60/438; A61M60/449; A61M60/497; A61M60/50; A61M60/508; A61M60/538; A61M60/80; A61M60/855; A61M60/865; A61M60/871; A61M60/878; A61M60/89; A61M60/894; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/00234; A61B2017/00345; A61M60/247; A61M60/253; A61M60/268; A61M60/274
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
139 words
An intravascular apparatus comprising: an elongated catheter for insertion into and movement through a vascular system of a patient, said catheter having a distal end and a proximal end; a chamber coupled to said catheter at said distal end; a first inlet port in communication with said chamber; an exit port in communication with said chamber; a motor located at a distal portion of said catheter; an electrical lead means connected to said motor and extending to the proximal end of said catheter to supply electrical energy to said motor; an in vivo pump located at said distal portion of said catheter and coupled to an output of said motor; said pump also operatively coupled to said chamber to draw fluid into said chamber through said first inlet port and push fluid from said chamber through said exit port.
Claim 2
Dependent Claim
139 words
An intravascular apparatus comprising: an elongated catheter for insertion into and movement through a vascular system of a patient, said catheter having a distal end and a proximal end; a chamber coupled to said catheter at said distal end; a first inlet port in communication with said chamber; an exit port in communication with said chamber; a motor located at a distal portion of said catheter; an electrical lead means connected to said motor and extending to the proximal end of said catheter to supply electrical energy to said motor; an in vivo pump located at said distal portion of said catheter and coupled to an output of said motor; said pump also operatively coupled to said chamber to draw fluid into said chamber through said first inlet port and push fluid from said chamber through said exit port.
Claim 3
Dependent Claim
105 words
The apparatus of claim 1 wherein said pump comprises: a magnet; driving coils coupled to said electrical lead means to receive current therefrom, said driving coils located relative to said magnet to generate a force against said magnet to cause movement thereof; a sensor located adjacent to said magnet and operative to provide an output signal indicative of a position thereof; and a circuit coupled to said sensor and said electrical lead means, said circuit receiving said output signal from said sensor, said circuit further comprising means for adjusting current supplied to said drive coils through said electrical lead means based on the output signal.
Claim 4
Dependent Claim
33 words
The apparatus of claim 2 wherein said magnet is inside said chamber, and movement of said magnet inside said chamber draws fluid into said first inlet port and out of said exit port.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 further comprising: a second inlet port in communication with said chamber.
Claim 6
Dependent Claim
30 words
The apparatus of claim 4 further comprising: a first valve that opens and closes said first inlet port; and a second valve that opens and closes said second inlet port.
Claim 7
Dependent Claim
40 words
The apparatus of claim 5 wherein said first valve comprises: a first magnet; and first driving coils coupled to said electrical leads means for receiving current therefrom to thereby generate a force against said first magnet to cause movement thereof.
Claim 8
Dependent Claim
40 words
The apparatus of claim 6 wherein said second valve comprises: a second magnet; and second driving coils coupled to said electrical lead means for receiving current therefrom to thereby generate a force against said second magnet to cause movement thereof.
Claim 9
Dependent Claim
39 words
The apparatus of claim 7 wherein said pump comprises: a third magnet; and third driving coils coupled to said electrical lead means for receiving current therefrom to thereby generate a force against said third magnet to cause movement thereof.
Claim 10
Dependent Claim
30 words
The apparatus of claim 8 wherein: said chamber has a cylindrical shape; and said first, second, and third magnets each has a cylindrical shape and is located within said chamber.
Claim 11
Dependent Claim
30 words
The apparatus of claim 9 wherein: said third magnet is located between said first and second magnets; and said third magnet moves in a forward direction and a backward direction.
Claim 12
Dependent Claim
97 words
The apparatus of claim 10 wherein: said first magnet covers at least a portion of said inlet port when said third magnet moves in said forward direction; said first magnet does not cover at least a portion of said inlet port when said third magnet moves in said backward direction; said second magnet does not cover at least a portion of said second inlet port when said third magnet moves in said forward direction; and said second magnet covers at least a portion of said second inlet port when said third magnet moves in said backward direction.
Claim 13
Dependent Claim
133 words
An intravascular apparatus comprising: a catheter having a distal portion and a proximal portion; a housing having a chamber therein said housing located at said distal portion of said catheter; said housing having an inlet port in communication with said chamber; said housing having an exit port in communication with said chamber; an in vivo pump coupled to said housing to draw fluid into said chamber through said inlet port and increase pressure within at least a portion of said chamber to thereby push fluid from said chamber through said exit port; and an motor coupled to said pump and located adjacent thereto; an electrical lead coupled to said motor to provide electrical energy thereto, said electrical lead extending from said distal portion of said catheter to said proximal portion of said catheter.
Claim 14
Dependent Claim
133 words
An intravascular apparatus comprising: a catheter having a distal portion and a proximal portion; a housing having a chamber therein said housing located at said distal portion of said catheter; said housing having an inlet port in communication with said chamber; said housing having an exit port in communication with said chamber; an in vivo pump coupled to said housing to draw fluid into said chamber through said inlet port and increase pressure within at least a portion of said chamber to thereby push fluid from said chamber through said exit port; and an motor coupled to said pump and located adjacent thereto; an electrical lead coupled to said motor to provide electrical energy thereto, said electrical lead extending from said distal portion of said catheter to said proximal portion of said catheter.
Claim 15
Dependent Claim
23 words
The apparatus of claim 12 wherein: said chamber has a cylindrical shape; and said pump has a cylindrically shaped actuator within said chamber.
Claim 16
Dependent Claim
84 words
The apparatus of claim 13 wherein: said actuator is situated within said chamber such that said actuator can move in a forward direction and a backward direction; said actuator covering said inlet port during at least a portion of said actuator' movement in said forward direction, thereby increasing pressure within at least a portion of said chamber; and said actuator not covering said inlet port during at least a portion of said actuator's movement in said backward direction, thereby drawing fluid into said chamber.
Claim 17
Dependent Claim
19 words
The apparatus of claim 14 further comprising means coupled to said actuator for moving said actuator forward and backward.
Claim 18
Dependent Claim
22 words
The apparatus of claim 15 wherein said cylindrically shaped actuator comprises a tube having a solid cylindrical piston at one end thereof.
Claim 19
Dependent Claim
23 words
The apparatus of claim 16 wherein at least a portion of said means coupled to said actuator is located externally of said catheter.
References Cited (Backward Citations)
US4375941A
Cited
US4437815A
Cited
US5085562A
Cited
US5092844A
Cited
US5163910A
Cited
US5360445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-05-12 | 2000-11-11 | 2001-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-12 | 2004-11-11 | 2005-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-12 | 2008-11-11 | 2009-05-13 | $7700.00 | Window Closed / Lapsed |