[특허]Methods of operating a rotary blood pump

Methods of operating a rotary blood pump 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61M-001/10 F04D-013/06 F04D-029/047 F04D-029/048 F16C-032/04 F04D-029/041
출원번호	US-0328610 (2014-07-10)
등록번호	US-9533083 (2017-01-03)
발명자 / 주소	Wampler, Richard K. Lancisi, David M.
출원인 / 주소	Thoratec Corporation
대리인 / 주소	Inskeep IP Group, Inc.
인용정보	피인용 횟수 : 0 인용 특허 : 50

초록 ▼

Various “contactless” bearing mechanisms including hydrodynamic, hydrostatic, and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. These design features may be combined. In one embodiment, the pump apparatus includes a rotor having a bore, a ring-shaped upper rotor bearing magnet, and a ring-shaped lower rotor bearing magnet. The bearing magnets are concentric with the bore. The lack of mechanical contact bearings enables longer life pump operation and less damage to working fluids such as blood.

대표청구항 ▼

1. A method of suspending a rotor in a fluid pump during pumping comprising: disposing a rotor in a housing having a center-post for rotation around said center-post;magnetically biasing said rotor axially in a first direction;providing an axial stabilizing force to said rotor with an axial magnetic bearing comprising a combination of at least one ring-shaped center-post magnet and at least one ring-shaped rotor magnet;causing said rotor to rotate and thereby pump fluid;inducing hydrodynamic forces on said rotor in opposition to said magnetic biasing of said rotor; andbalancing said biasing and said hydrodynamic forces so as to suspend said rotor in said housing assembly during rotation of said rotor. 2. A method according to claim 1, wherein inducing hydrodynamic forces includes causing a film of blood to form on contoured surfaces between said rotor and said housing assembly. 3. A method according to claim 2, wherein said contoured surfaces are curved and tapered ramps. 4. A method according to claim 3, wherein said contoured surfaces are disposed on said rotor. 5. A method according to claim 1, further comprising adjusting the relative positioning of said at least one ring-shaped center-post magnet and said at least one ring-shaped rotor magnet so as to modify the biasing of said rotor axially in said first direction. 6. A method according to claim 5, wherein said adjusting includes axially moving said at least one ring-shaped center-post magnet relative to said at least one ring-shaped rotor magnet. 7. A method according to claim 1, further comprising causing leakage flow of said fluid to occur between an annular gap between said center post and said rotor. 8. A method of operating a blood pump comprising: obtaining a centrifugal blood pump having a housing that encloses a spindle as well as a rotor that is positioned to spin around said spindle and wherein said rotor is magnetically biased axially in a first direction;supporting said rotor with forces arising from a bearing formed of a combination of at least one ring-shaped spindle magnet and at least one ring-shaped rotor magnet;causing said rotor to rotate and thereby pump blood;inducing hydrodynamic forces on said rotor in opposition to said magnetic biasing of said rotor; andbalancing said biasing and said hydrodynamic forces so as to suspend said rotor in said housing assembly during rotation of said rotor. 9. A method according to claim 8, wherein inducing hydrodynamic forces includes causing a film of blood to form on contoured surfaces between said rotor and said housing assembly. 10. A method according to claim 9, wherein said contoured surfaces are curved and tapered ramps. 11. A method according to claim 10, wherein said contoured surfaces are disposed on said rotor. 12. A method according to claim 8, wherein said rotor is biased axially by passive magnetic forces between the rotor and the spindle. 13. A method according to claim 8, further comprising adjusting the relative positioning of said at least one ring-shaped spindle magnet and said at least one ring-shaped rotor magnet so as to adjust the biasing of said rotor axially in said first direction. 14. A method according to claim 13, wherein said adjusting includes axially moving said at least one ring-shaped spindle magnet relative to said at least one ring-shaped rotor magnet. 15. A method according to claim 8, further comprising causing leakage flow of said blood to occur between an annular gap between said spindle and said rotor. 16. A method of balancing a rotor in a blood pump comprising: obtaining said pump in a state where said rotor is pre-biased in a first direction;causing said rotor to rotate and thereby pump blood;supporting said rotor with a bearing comprised of at least one ring-shaped spindle magnet and at least one ring-shaped rotor magnet;inducing hydrodynamic forces on said rotor in opposition to said pre-biasing of said rotor; andbalancing said pre-biasing and said hydrodynamic forces so as to suspend said rotor in said housing assembly during rotation of said rotor. 17. A method according to claim 16, wherein inducing hydrodynamic forces includes causing a film of blood to form on contoured surfaces between said rotor and a housing assembly of said centrifugal blood pump. 18. A method according to claim 17, wherein said contoured surfaces are curved and tapered ramps. 19. A method according to claim 18, wherein said contoured surfaces are disposed on said rotor. 20. A method according to claim 17, wherein said rotor is pre-biased by magnetic forces. 21. A method according to claim 16, further comprising adjusting the relative positioning of said at least one ring-shaped spindle magnet and said at least one ring-shaped rotor magnet so as to modify the pre-biasing of said rotor axially in said first direction. 22. A method according to claim 21, wherein said adjusting includes axially moving said at least one ring-shaped spindle magnet relative to said at least one ring-shaped rotor magnet. 23. A method according to claim 16, further comprising causing leakage flow of said blood to occur between an annular gap between a spindle and said rotor.

이 특허에 인용된 특허 (50)

Wampler Richard K. ; Lancisi David M., Active magnetic bearing system for blood pump.
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Yamazaki, Kenji; Mori, Toshio; Iiyama, Haruo; Yamazaki, Shunichi; Ito, Nobutaka; Miyao, Osami; Hori, Masanori; Iwasaki, Yukio; Adachi, Hitoshi; Higuchi, Kouji, Auxiliary artificial heart of an embedded type.
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Isaacson Milton S. (Dayton OH) Lioi Anthony P. (Round Rock TX), Axial flow blood pump with hydrodynamically suspended rotor.
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Jarvik Robert, Axial force null position magnetic bearing and rotary blood pumps which use them.
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Izraelev Valentin M. (Eden Prairie MN), Bearing and seal-free blood pump.
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Hart Robert M., Bearingless blood pump and electronic drive system.
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Goldowsky Michael (Valhalla NY), Blood pump actuator.
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Westphal Dieter,DEX ; Reul Helmut,DEX ; Rau Guenter,DEX, Blood pump as centrifugal pump.
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Antaki James F. ; Paden Bradley ; Burgreen Gregory ; Groom Nelson J., Blood pump having a magnetically suspended rotor.
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James F. Antaki ; Bradley Paden ; Gregory Burgreen ; Nelson J. Groom, Blood pump having a magnetically suspended rotor.
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Izraelev Valentin M., Blood pump having rotor with internal bore for fluid flow.
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Nojiri Toshihiko,JPX ; Nakazeki Tsugito,JPX ; Akamatsu Teruaki,JPX, Centrifugal blood pump assembly.
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Schob Reto,CHX, Centrifugal pump.
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Schima Heinrich,ATX ; Schmallegger Helmut,ATX, Centrifugal pump for pumping blood and other shear-sensitive liquids.
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Nose Yukihiko ; Takatani Setsuo ; Sakuma Ichiro,JPX ; Ohara Yasuhisa ; Makinouchi Kenzo, Ceramic pivot bearing arrangement for a sealless blood pump.
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Kazatchkov Lev,ARX ; Varela Lucas,ARX, Continuous flow rotary pump.
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Kletschka Harold D. (1925 Noble Dr. Minneapolis MN 55422), Fluid pump with levitated impeller.
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Kletschka Harold D. (1925 Noble Dr. Minneapolis MN 55422), Fluid pump with magnetically levitated impeller.
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Kletschka Harold D. (1925 Noble Dr. Minneapolis MN 55422), Fluid pump with magnetically levitated impeller.
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Khanwilkar, Pratap S.; Allaire, Paul E.; Bearnson, Gill B.; Olsen, Don B.; Maslen, Eric H.; Long, James W., Hybrid magnetically suspended and rotated centrifugal pumping apparatus and method.
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Isaacson Milton S. (Dayton OH) Lioi Anthony P. (Dayton OH), Hydrodynamically suspended rotor axial flow blood pump.
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Lemieux Guy B. (14326 Greencrest Drive Surrey ; B.C. CAX V4P 1M1), Integral motor and pump.
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Rau Guenter,DEX ; Reul Helmut,DEX ; Siess Thorsten,DEX, Intravascular blood pump.
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Goldowsky, Michael P., Magnetic suspension blood pump.
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Bramm Gunter L. (Munich UT DEX) Olsen Don B. (Salt Lake City UT), Magnetically suspended and rotated rotor.
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Prem Edward K., Magnetically suspended fluid pump and control system.
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Edward K. Prem ; Steve A. Kolenik, Magnetically suspended fluid pump and control system with defibrillator.
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Moise John C. (Carmichael CA), Magnetically suspended rotor axial flow blood pump.
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Paden Bradley E., Magnetically-suspended centrifugal blood pump.
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Maruyama Teruo (Neyagawa JPX), Pump for supplying liquid fuel.
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Gill B. Bearnson ; Pratap S. Khanwilkar ; James W. Long ; Jed C. Ludlow ; Brad E. Paden ; Chen Chen ; Dave B. Paden ; Don B. Olsen ; James Antaki ; Paul E. Allaire ; Michael Baloh, Pump having a magnetically suspended rotor with one active control axis.
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Davis, William D.; Lancisi, David M., Pump with electrodynamically supported impeller.
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Mizobuchi Shotaro (Kanagawa JPX) Sasaki Katsumi (Tokyo JPX) Kimura Yoshikazu (Kanagawa JPX), Pump with shaftless impeller.
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Wampler Richard K. ; Lancisi David M., Rotary blood pump.
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Wampler, Richard K.; Lancisi, David M., Rotary blood pump.
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Woodard John C.,AUX ; Watterson Peter A.,AUX ; Tansley Geoffrey D.,AUX, Rotary pump with exclusively hydrodynamically suspended impeller.
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Golding Leonard A. R. ; Smith William A., Rotodynamic pump with non-circular hydrodynamic bearing journal.
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Golding Leonard A. R. (Moreland Hills OH) Smith William A. (Lyndhurst OH) Wade Warren F. (Orange Village OH), Sealless heart pump.
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Richard K. Wampler, Sealless rotary blood pump.
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Wampler Richard K., Sealless rotary blood pump.
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Wampler Richard K., Sealless rotary blood pump.
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Wampler Richard K., Sealless rotary blood pump.
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Wampler, Richard K., Sealless rotary blood pump.
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Wampler Richard K. (Granite Bay CA), Sealless rotary blood pump with passive magnetic radial bearings and blood immersed axial bearings.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Methods of operating a rotary blood pump 원문보기

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Methods of operating a rotary blood pump 원문보기

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