Occlusion detection using pulse-width modulation and medical device incorporating same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-005/14
H02P-008/38
F04B-049/10
A61M-005/145
A61M-005/142
A61M-005/168
출원번호
US-0070193
(2013-11-01)
등록번호
US-9344024
(2016-05-17)
발명자
/ 주소
Favreau, Jacques L.
출원인 / 주소
Medtronic MiniMed, Inc.
대리인 / 주소
Ingrassia Fisher & Lorenz, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
199
초록▼
Apparatus are provided for motor control systems and related medical devices. In one embodiment, a control system includes a motor having a rotor, a modulation module coupled to the motor, and a control module coupled to the modulation module. The modulation module generates a modulated voltage that
Apparatus are provided for motor control systems and related medical devices. In one embodiment, a control system includes a motor having a rotor, a modulation module coupled to the motor, and a control module coupled to the modulation module. The modulation module generates a modulated voltage that is applied to the motor and rotates the rotor to deliver fluid via a fluid path. The control module adjusts a duty cycle of the modulated voltage to achieve a commanded rotation of the rotor and detects an occlusion condition in the fluid path based on the duty cycle.
대표청구항▼
1. A method of detecting an occlusion in a fluid path of an infusion device, the method comprising: applying a modulated voltage to a stepper motor to produce a commanded number of motor steps of rotation of a rotor of the stepper motor, the rotation of the rotor resulting in delivery of fluid via t
1. A method of detecting an occlusion in a fluid path of an infusion device, the method comprising: applying a modulated voltage to a stepper motor to produce a commanded number of motor steps of rotation of a rotor of the stepper motor, the rotation of the rotor resulting in delivery of fluid via the fluid path;determining an expected number of incremental rotations expected to be detected by a sensor coupled to the stepper motor in response to applying the modulated voltage to the stepper motor to produce the commanded number of motor steps based on the commanded number of motor steps;obtaining a measured number of incremental rotations of the rotor from the sensor in response to applying the modulated voltage to the stepper motor to produce the commanded number of motor steps;adjusting a duty cycle of the modulated voltage to achieve the commanded number of motor steps in response to a difference between the expected number and the measured number; andidentifying an occlusion condition based on the duty cycle. 2. A method of detecting an occlusion in a fluid path of an infusion device, the method comprising: applying a modulated voltage to a motor to produce rotation of a rotor of the motor, the modulated voltage oscillating between a first voltage and a second voltage, the modulated voltage being equal to the first voltage for a percentage of a time interval, the percentage corresponding to a duty cycle, the rotation of the rotor resulting in delivery of fluid via the fluid path;adjusting the duty cycle of the modulated voltage to achieve a commanded rotation of the rotor; andidentifying an occlusion condition based on the duty cycle. 3. A method of detecting an occlusion in a fluid path of an infusion device, the method comprising: applying a modulated voltage to a motor to produce rotation of a rotor of the motor, the rotation of the rotor resulting in delivery of fluid via the fluid path;adjusting a duty cycle of the modulated voltage to achieve a commanded rotation of the rotor; andidentifying an occlusion condition based on the duty cycle. 4. The method of claim 3, wherein applying the modulated voltage comprises: applying the modulated voltage oscillating between a first voltage and a second voltage;the modulated voltage is equal to the first voltage for a percentage of a time interval; andthe percentage corresponds to the duty cycle. 5. The method of claim 3, the rotor being mechanically coupled to a stopper, the stopper being displaced in response to the rotation of the rotor to deliver the fluid from a reservoir via the fluid path, wherein applying the modulated voltage comprises applying the modulated voltage to the motor to produce the commanded rotation of the rotor corresponding to a commanded displacement of the stopper. 6. The method of claim 3, wherein identifying the occlusion condition comprises identifying a change in the duty cycle indicative of the occlusion in the fluid path. 7. The method of claim 3, further comprising providing a notification of the occlusion condition after identifying the occlusion condition, wherein the notification is utilized to augment another occlusion detection algorithm. 8. The method of claim 3, wherein identifying the occlusion condition comprises identifying the occlusion condition based on the duty cycle when an anomaly exists with respect to another occlusion detection algorithm. 9. The method of claim 3, wherein adjusting the duty cycle comprises: operating the motor to produce the commanded rotation while applying the modulated voltage;determining an expected displacement based on the commanded rotation;obtaining a measured displacement influenced by the rotation of the rotor after operating the motor to produce the commanded rotation; andincreasing the duty cycle in response to a difference between the expected displacement and the measured displacement. 10. The method of claim 9, wherein: obtaining the measured displacement comprises obtaining a measured number of incremental rotations of the rotor using an incremental position sensor; anddetermining the expected displacement comprises determining an expected number of incremental rotations expected to be detected by the incremental position sensor in response to operating the motor to produce the commanded rotation while applying the modulated voltage. 11. The method of claim 3, further comprising determining an observed value for a duty cycle metric based on the duty cycle, wherein identifying the occlusion condition comprises detecting the occlusion condition when the observed value exceeds a reference value. 12. The method of claim 11, further comprising determining the reference value for the duty cycle metric that is indicative of the occlusion in the fluid path. 13. The method of claim 12, wherein the reference value is representative of changes to the duty cycle that are likely to be exhibited in response to the occlusion in the fluid path while the motor is operated using closed-loop dynamic PWM control. 14. The method of claim 12, wherein the reference value comprises a rate of change of the duty cycle over a preceding time interval. 15. The method of claim 12, wherein the reference value comprises a moving average of the duty cycle over a preceding time interval. 16. The method of claim 12, wherein the reference value comprises a sequence of duty cycles over a preceding time interval. 17. The method of claim 12, wherein the reference value comprises a threshold duty cycle value. 18. The method of claim 12, wherein the reference value comprises a matched filter applied to a sequence of duty cycles over a preceding time interval. 19. The method of claim 12, wherein determining the reference value comprises performing a calibration routine while simulating the occlusion in the fluid path. 20. The method of claim 19, wherein performing the calibration routine comprises operating the motor for a number of motor steps that is greater than an amount of motor steps that are achievable with a reference occlusion in the fluid path.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (199)
Batina, William P.; White, Robert M., Acquisition circuit for cardiac pacer.
Schulman Joseph H. ; Lucisano Joseph Y. ; Shah Rajiv ; Byers Charles L. ; Pendo Shaun M., Alumina insulation for coating implantable components and other microminiature devices.
Tune Joel (Antioch IL) Anderson Robert L. (Boulder CO) Blankenship Larry (Boulder CO) Colesworthy ; III Daniel C. (Boulder CO) Heim Warren P. (Boulder CO) Miller ; III Scott A. (Boulder CO) Sherman B, Ambulatory infusion pump.
Coutr James E. (Concord MA) Griffin Wayne P. (Dracut MA) Crisler Charles M. (Windham NH), An infusion management and pumping system having an alarm handling system.
Say James ; Tomasco Michael F. ; Heller Adam ; Gal Yoram,ILX ; Aria Behrad ; Heller Ephraim ; Plante Phillip John ; Vreeke Mark S. ; Friedman Keith A. ; Colman Fredric C., Analyte monitoring device and methods of use.
Steil, Garry M.; Rebrin, Kerstin; Goode, Jr., Paul V.; Mastrototaro, John J.; Purvis, Richard E.; Van Antwerp, William P.; Shin, John J.; Talbot, Cary D., Closed loop system for controlling insulin infusion.
Prestele Karl (Erlangen DEX) Franetzki Manfred (Uttenreuth DEX) Reif Erich (Erlangen DEX), Device for the infusion of fluids into the human or animal body.
Say James ; Tomasco Michael F. ; Heller Adam ; Gal Yoram,ILX ; Aria Behrad ; Heller Ephraim ; Plante Phillip John ; Vreeke Mark S., Electrochemical analyte.
James Say ; Michael F. Tomasco ; Adam Heller ; Yoram Gal IL; Behrad Aria ; Ephraim Heller ; Phillip John Plante ; Mark S. Vreeke, Electrochemical analyte sensor.
Gibson, Scott R.; Shah, Rajiv; Chernoff, Edward; Byers, Charles, Electronic lead for a medical implant device, method of making same, and method and apparatus for inserting same.
Gregg Brian A. (13940 Braun Dr. Golden CO 80401) Heller Adam (5317 Valburn Cir. Austin TX 78731) Kerner Wolfgang (Universitat Zu Lubeck ; Klinik Fur Innerere Medizin ; Razeburger Allee 160 D-2400 Lub, Enzyme electrodes.
Gregg Brian A. (13940 Braun Dr. Golden CO 80401) Heller Adam (5317 Valburn Cir. Austin TX 78731) Kerner Wolfgang (Universitat zu Lubeck ; Klinik fur Innerere Medizin ; Razeburger Allee 160 D-2400 Lub, Enzyme electrodes.
Lord Peter C. (Santa Clarita CA) Van Antwerp William P. (Brentwood CA) Mastrototaro John J. (Los Angeles CA) Cheney ; II Paul S. (Beverly Hills CA) Schnabel Nannette M. (Valencia CA), Flex circuit connector.
Dempsey Michael K. (Acton MA) Kotfila Mark S. (Chelmsford MA) Snyder Robert J. (Westford MA), Flexible patient monitoring system featuring a multiport transmitter.
Yap, Darren Y. K.; Gulati, Poonam; Kovelman, Paul H.; Van Antwerp, William P.; Enegren, Bradley J.; Geismar, Eric P.; Hudak, Philip J.; McConnell, Susan; Moberg, Sheldon B., Fluid reservoir piston.
Schulman Joseph H. (Santa Clarita CA) Rule ; III Orville R. (Los Angeles CA) Whitmoyer David I. (Los Angeles CA) Lebel Ronald J. (Sherman Oaks CA) Lucisano Joseph Y. (Saugus CA) Mann Alfred E. (Bever, Glucose monitoring system.
Schulman Joseph H. (Santa Clarita CA) Rule ; III Orville Rey (Los Angeles CA) Whitmoyer David I. (Los Angeles CA) Lebel Ronald J. (Sherman Oaks CA) Lucisano Joseph Y. (Saugus CA) Mann Alfred E. (Beve, Glucose sensor assembly.
McIvor, K. Collin; Cabernoch, James L.; Branch, Kevin D.; Van Antwerp, Nannette M.; Halili, Edgardo C.; Mastrototaro, John J., Glucose sensor package system.
Allen Douglas J. (Indianapolis IN) Johnson Kirk W. (Indianapolis IN) Nevin Robert S. (Indianapolis IN), Hydrophilic polyurethane membranes for electrochemical glucose sensors.
Schulman Joseph H. ; Byers Charles L. ; Adomian Gerald E. ; Colvin Michael S., Implantable enzyme-based monitoring systems having improved longevity due to improved exterior surfaces.
Wilson George S. (Lawrence KS) Bindra Dilbir S. (Lawrence KS) Hill Brian S. (Lawrence KS) Thevenot Daniel R. (Paris Cedex FRX) Sternberg Robert (Thiais FRX) Reach Gerard (Paris Cedex KS FRX) Zhang Ya, Implantable glucose sensor.
Meadows, Paul M.; Mann, Carla M.; Tsukamoto, Hisashi; Chen, Joey, Implantable pulse generators using rechargeable zero-volt technology lithium-ion batteries.
Moberg, Sheldon B.; Mounce, R. Paul; Bente, IV, Paul F.; Hanson, Ian B.; Kavazov, Julian D.; Griffin, Christopher G.; Chong, Colin A.; Hudak, Philip J., Infusion medium delivery device and method with drive device for driving plunger in reservoir.
Gargano Diane A. ; Flachbart Eric J. ; Cowen Barry ; Duh Monica ; Rudser ; Jr. John L. ; Zhen Ken ; Noble Lynn ; Warhurst Julian ; Pedraza Luis, Infusion pump for at least one syringe.
Coutre James E. (114 Stone Root La. Concord MA 01742) Griffin Wayne P. (55 Surrey La. Dracut MA 01826) Crisler Charles M. (10 Sunridge Rd. Windham NH 03087), Infusion pump management system for suggesting an adapted course of therapy.
Causey ; III James D. (Simi Valley CA) Schloss Harold C. (Los Angeles CA) Snell Jeffery D. (Northridge CA), Interactive programming and diagnostic system for use with implantable pacemaker.
Say, James L.; Sakslund, Henning; Tomasco, Michael F.; Audett, Jay D.; Cho, Hyun; Yamasaki, Duane O.; Heller, Adam, Mass transport limited in vivo analyte sensor.
Castellano Thomas P. (Beverly Hills CA) Schumacher Robert (Beverly Hills CA), Medication delivery device with a microprocessor and characteristic monitor.
Colman Fredric C. (Granada Hills CA) Purvis Richard E. (Glendale CA), Medication infusion system having optical motion sensor to detect drive mechanism malfunction.
Peterson Bruce A. (Milwaukie OR) Hogard Michael E. (Oregon City OR) Johnson Harley D. (Portland OR) Kelly Thomas D. (Portland OR) Long Jean M. (Portland OR) Preston ; Jr. William G. (Portland OR), Method and apparatus for kidney dialysis.
Joseph H. Schulman ; Joseph Y. Lucisano ; Rajiv Shah ; Charles L. Byers ; Shaun M. Pendo, Method of applying insulation for coating implantable components and other microminiature devices.
Feldman, Benjamin J.; Heller, Adam; Heller, Ephraim; Mao, Fei; Vivolo, Joseph A.; Funderburk, Jeffery V.; Colman, Fredric C.; Krishnan, Rajesh, Method of using a small volume in vitro analyte sensor with diffusible or non-leachable redox mediator.
Moberg, Sheldon B.; Causey, III, James D.; Bare, Rex O.; Scherer, Andrew J.; Sargent, Bradley J., Methods, apparatuses, and uses for infusion pump fluid pressure and force detection.
Sheldon B. Moberg ; James D. Causey, III ; Rex O. Bare ; Andrew J. Scherer ; Bradley J. Sargent, Methods, apparatuses, and uses for infusion pump fluid pressure and force detection.
Brown Stephen J. ; Jensen Erik K., On-line health education and feedback system using motivational driver profile coding and automated content fulfillment.
Roizen Michael (Chicago IL) Turcotte ; II William E. (Oak Park IL) Pfisterer Richard E. (Arlington Heights IL), Portable medical interactive test selector having plug-in replaceable memory.
Say James ; Tomasco Michael F. ; Heller Adam ; Gal Yoram,ILX ; Aria Behrad ; Heller Ephraim ; Plante Phillip John ; Vreeke Mark S., Process for producing an electrochemical biosensor.
Livingston John H. (Los Angeles CA) Frye Ward K. (San Luis Obispo CA) Field Jeffrey F. (Northridge CA), Proctective case for a medication infusion pump.
Sancoff Gregory E. (Leucadia CA) McWilliams Mark (San Diego CA) Barr Howard S. (Escondido CA) Cordner ; Jr. Edward T. (Carlsbad CA) Barton Russell C. (Monrovia CA), Programmable infusion system.
Shin, John J.; Holtzclaw, Kris R.; Dangui, Nandita D.; Kanderian, Jr., Sami; Mastrototaro, John J.; Hong, Peter I., Real time self-adjusting calibration algorithm.
Langen Pauline A. (Simsbury CT) Katz Jeffrey S. (West Hartford CT) Dempsey Gayle (Needham MA) Pompano James (East Haven CT), Remote monitoring of high-risk patients using artificial intelligence.
Epstein Paul (Brookline MA) Petschek Harry (Lexington MA) LaWhite Eric (South Royalton VT) Strohl Clair (Norfolk MA) Coyne Henry (Framington MA) Kaleskas Edward (Jefferson MA) Adaniya George (Swampsc, Remotely programmable infusion system.
Lundquist Ingemar H. (Pebble Beach CA) Tarczy-Hornoch Zoltan (Berkeley CA) Kardos Thomas J. (Laguna Beach CA), Retroperfusion and retroinfusion control apparatus, system and method.
Liamos, Charles T.; Feldman, Benjamin J.; Funderburk, Jeffery V.; Krishnan, Rajesh; Plante, Phillip John; Vivolo, Joseph A.; Jin, Robert Y.; Cloud, Michael S., Small volume in vitro analyte sensor and methods.
Liamos, Charles T.; Feldman, Benjamin J.; Funderburk, Jeffery V.; Krishnan, Rajesh; Plante, Phillip John; Vivolo, Joseph A.; Jin, Robert Y.; Cloud, Michael S., Small volume in vitro analyte sensor and methods.
Nason Clyde K. (25745 N. Player Dr. Valencia CA 91355) Culp Gordon W. (13832 Haynes St. Van Nuys CA 91401), Solenoid drive apparatus for an external infusion pump.
Starkweather, Timothy J.; Lebel, Ronald J.; Shah, Rajiv; Miller, Michael E., System and method for providing closed loop infusion formulation delivery.
Aoki Thomas T. (1021 El Sur Way Sacramento CA 95825), System and method for treating animal body tissues to improve the dietary fuel processing capabilities thereof.
Tacklind Christopher A. (Palo Alto CA) Sanders Matthew H. (Los Altos Hills CA) Walne Geoffrey B. (Atherton CA), System for monitoring and reporting medical measurements.
Moberg, Sheldon B.; Hanson, Ian B.; Mounce, R. Paul; Bente, IV, Paul F.; Kavazov, Julian D., Systems and methods allowing for reservoir filling and infusion medium delivery.
Blomquist Michael L. (Coon Rapids MN) Peterson Thomas L. (Shoreview MN), Systems and methods for operating ambulatory medical devices such as drug delivery devices.
Mann, Alfred E.; Purvis, Richard E.; Mastrototaro, John J.; Causey, James D.; Henke, James; Hong, Peter; Livingston, John H.; Hague, Clifford W.; Hite, Brad T., Telemetered characteristic monitor system and method of using the same.
Lord Peter C. (Santa Clarita CA) Van Antwerp William P. (Brentwood CA) Mastrototaro John J. (Los Angeles CA) Cheney ; II Paul S. (Beverly Hills CA) Schnabel Nannette M. (Valencia CA), Transcutaneous sensor insertion set.
Gerety, Eugene P.; Strempski, Richard A.; Sardi, Stephen G., Two-dimensional printed code for storing biometric information and integrated off-line apparatus for reading same.
Carter,Scott J.; Flanders,Edward L.; Hannah,Stephen E., Wireless LAN architecture for integrated time-critical and non-time-critical services within medical facilities.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.