Differential pressure based flow sensor assembly for medication delivery monitoring and method of using the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-031/00
G01F-001/42
출원번호
US-0335128
(2008-12-15)
등록번호
US-8403908
(2013-03-26)
발명자
/ 주소
Jacobson, James D.
Barclay, Brian
Brumund, Ryan
Cho, Steven T.
Choudhury, Hrishikesh
Fathallah, Marwan A.
Johnson, Tom
Keely, Patrick B.
Khair, Mohammad M.
Lowery, Michael G.
Walsworth, Frank
Ziegler, John S.
출원인 / 주소
Hospira, Inc.
대리인 / 주소
Crabb, Michael R.
인용정보
피인용 횟수 :
10인용 특허 :
75
초록▼
A differential pressure based flow sensor assembly and method of using the same to determine the rate of fluid flow in a fluid system. The sensor assembly comprises a disposable portion, and a reusable portion. A flow restricting element is positioned along a fluid flow passage between an inlet and
A differential pressure based flow sensor assembly and method of using the same to determine the rate of fluid flow in a fluid system. The sensor assembly comprises a disposable portion, and a reusable portion. A flow restricting element is positioned along a fluid flow passage between an inlet and an outlet. The disposable portion further has an upstream fluid pressure membrane and a downstream fluid pressure membrane. The reusable portion has an upstream fluid pressure sensor and a downstream fluid pressure sensor. The upstream fluid pressure sensor senses the upstream fluid pressure at a location within the fluid flow passage between the inlet and the flow restricting element. The downstream fluid pressure sensor senses the downstream fluid pressure at a location within the fluid flow passage between the flow restricting element and the outlet. The process utilizes output of the sensors to calculate the flow rate of the fluid.
대표청구항▼
1. A differential pressure based flow sensor assembly to determine the flow rate of a fluid system comprising: a disposable portion having: a sealed disposable body defining a fluid flow passage forming an inlet and an outlet;a flow restricting element positioned along the fluid flow passage between
1. A differential pressure based flow sensor assembly to determine the flow rate of a fluid system comprising: a disposable portion having: a sealed disposable body defining a fluid flow passage forming an inlet and an outlet;a flow restricting element positioned along the fluid flow passage between the inlet and the outlet, wherein the flow restricting element includes an orifice that defines a non-capillary fluid flow path;an impermeable upstream fluid pressure membrane at a location in the fluid flow passage between the inlet and the flow restricting element; andan impermeable downstream fluid pressure membrane at a location in the fluid flow passage between the flow restricting element and the outlet; anda fluid impermeable reusable portion including a housing removably coupled to the disposable portion and having: an upstream fluid pressure sensor to sense an upstream fluid pressure at an upstream location in the fluid flow passage between the inlet and the flow restricting element, the upstream fluid pressure sensor being positioned and adapted to interact with the upstream fluid pressure membrane and thereby generally determine the fluid pressure at the upstream fluid pressure membrane; anda downstream fluid pressure sensor to sense an downstream fluid pressure at a downstream location in the fluid flow passage between the flow restricting element and the outlet, the downstream fluid pressure sensor being positioned and adapted to interact with the downstream fluid pressure membrane and thereby generally determine the fluid pressure at the downstream fluid pressure membrane. 2. The differential pressure based flow sensor assembly of claim 1 wherein the disposable body comprises a thermoplastic. 3. The differential pressure based flow sensor assembly of claim 2, wherein the flow restricting element comprises the same thermoplastic as the disposable body. 4. The differential pressure based flow sensor assembly of claim 2, wherein the flow restricting element comprises a different polymeric material than the disposable body. 5. The differential pressure based flow sensor assembly of claim 2, wherein the flow restricting element comprises silicon. 6. The differential pressure based flow sensor assembly of claim 2, wherein the flow restricting element comprises glass. 7. The differential pressure based flow sensor assembly of claim 1, wherein the upstream fluid pressure membrane and the downstream fluid pressure membrane comprise a polymeric material. 8. The differential pressure based flow sensor assembly of claim 7, wherein the polymeric material is TPE. 9. The differential pressure based flow sensor assembly of claim 1, wherein the upstream fluid pressure membrane and the downstream fluid pressure membrane comprise an elastomeric material. 10. The differential pressure based flow sensor assembly of claim 1, wherein a perimeter of an opening of the orifice is larger than a length of a path the fluid travels through the orifice. 11. The differential pressure based flow sensor assembly of claim 10, wherein a ratio of the perimeter to the length of the path the fluid travels through the orifice is no greater than about 1000:1. 12. The differential pressure based flow sensor assembly of claim 1, wherein the flow restricting element is integrally formed within the disposable body. 13. The differential pressure based flow sensor assembly of claim 1, wherein the flow restricting element is a separate component secured within the disposable body. 14. The differential pressure based flow sensor assembly of claim 1, wherein the reusable portion further comprises a membrane adapted to be in communication with the disposable fluid pressure membranes. 15. The differential pressure based flow sensor assembly of claim 1, wherein the reusable portion further comprises an electrical power source adapted to provide power to the upstream fluid pressure sensor and the downstream fluid pressure sensor. 16. A fluid-tight disposable assembly for removably coupling to a fluid impermeable reusable portion of a differential pressure based fluid flow sensor assembly, the disposable assembly comprising: a sealed body defining a fluid flow passage forming an inlet and an outlet;a flow restricting element positioned along the fluid flow passage between the inlet and the outlet, wherein the flow restricting element includes an orifice that defines a non-capillary fluid flow path;an impermeable upstream fluid pressure membrane sealing an upstream fluid chamber at a location in the fluid flow passage between the inlet and the flow restricting element; andan impermeable downstream fluid pressure membrane sealing a downstream fluid chamber at a location in the fluid flow passage between the flow restricting element and the outlet. 17. The disposable assembly of claim 16 wherein the body comprises a thermoplastic. 18. The disposable assembly of claim 17, wherein the flow restricting element comprises the same thermoplastic as the body. 19. The disposable assembly of claim 17, wherein the flow restricting element comprises a different polymeric material than the body. 20. The disposable assembly of claim 17, wherein the flow restricting element comprises silicon. 21. The disposable assembly of claim 17, wherein the flow restricting element comprises glass. 22. The disposable assembly of claim 16, wherein the upstream fluid pressure membrane and the downstream fluid pressure membrane comprise a polymeric material. 23. The disposable assembly of claim 22, wherein the polymeric material is TPE. 24. The disposable assembly of claim 16, wherein the upstream fluid pressure membrane and the downstream fluid pressure membrane comprise an elastomeric material. 25. The disposable assembly of claim 16, wherein a perimeter of an opening of the orifice is larger than a length of a path the fluid travels through the orifice. 26. The disposable assembly of claim 16, wherein the flow restricting element is integrally formed within the body. 27. The disposable assembly of claim 16, wherein the flow restricting element is a separate component secured within the body. 28. A method of determining a fluid flow rate in a fluid flow system comprising: providing a differential pressure based flow sensor assembly comprising: a fluid-tight disposable portion having: a sealed disposable body defining a fluid flow passage forming an inlet and an outlet;a flow restricting element positioned along the fluid flow passage between the inlet and the outlet, wherein the flow restricting element includes an orifice that defines a non-capillary fluid flow path;a disposable impermeable upstream fluid pressure membrane at a location in the fluid flow passage between the inlet and the flow restricting element; anda disposable impermeable downstream fluid pressure membrane at a location in the fluid flow passage between the flow restricting element and the outlet; anda fluid impermeable reusable portion including a housing removably coupled to the disposable portion and having: an upstream fluid pressure sensor to sense an upstream fluid pressure at an upstream location in the fluid flow passage between the inlet and the flow restricting element, the upstream fluid pressure sensor being positioned and adapted to interact with the upstream fluid pressure membrane and thereby generally determine the fluid pressure at the disposable upstream fluid pressure membrane; anda downstream fluid pressure sensor to sense a downstream fluid pressure at a downstream location in the fluid flow passage between the flow restricting element and the outlet, the downstream fluid pressure sensor being positioned and adapted to interact with the downstream fluid pressure membrane and thereby generally determine the fluid pressure at the disposable downstream fluid pressure membrane;directing a fluid through the fluid flow passage;calculating the fluid flow rate based on a pressure difference between an output of the upstream fluid pressure sensor and an output of the downstream fluid pressure sensor. 29. The method of determining a fluid flow rate in a fluid flow system of claim 28, further comprising determining if air is present within the fluid flow passage. 30. The method of determining a fluid flow rate in a fluid flow system of claim 28, further comprising determining if an obstruction is present within the fluid flow passage. 31. The method of determining a fluid flow rate in a fluid flow system of claim 30, wherein the determining if an obstruction is present further includes suggesting the location of the obstruction within the fluid flow passage. 32. The method of determining a fluid flow rate in a fluid flow system of claim 31, wherein the suggesting the location of the obstruction is determined by comparing the output of the upstream fluid pressure sensor and the output of the downstream fluid pressure sensor. 33. The method of determining a fluid flow rate in a fluid flow system of claim 32, wherein the suggested location of the obstruction is upstream of the upstream fluid pressure sensor if the output of the upstream fluid pressure sensor and the downstream fluid pressure sensor indicate a pressure below a minimum pressure level. 34. The method of determining a fluid flow rate in a fluid flow system of claim 32, wherein the suggested location of the obstruction is downstream of the downstream fluid pressure sensor if the output of the upstream fluid pressure sensor and the downstream fluid pressure sensor are generally identical. 35. The method of determining a fluid flow rate in a fluid flow system of claim 32, wherein the suggested location of the obstruction is at the flow restricting element if the output of the upstream fluid pressure sensor and the downstream fluid pressure sensor indicate a pressure difference above a pressure difference limit. 36. The method of determining a fluid flow in a fluid flow system of claim 28, further comprising deriving a fluid volume delivered over time based upon the calculating of the fluid flow rate. 37. A fluid delivery system for delivering medication from a first source to a patient including measuring the flow rate of the fluid, the system comprising: an infusion pump that selectively varies a rate of flow of the first medication from the first source through a fluid line;a differential pressure based flow sensor assembly to determine the flow rate of the first medication within the fluid line, the sensor assembly comprising: a fluid-tight disposable portion having: a sealed disposable body defining a fluid flow passage forming an inlet and an outlet;a flow restricting element positioned along the first fluid flow passage between the inlet and the outlet, wherein the flow restricting element includes an orifice that defines a non-capillary fluid flow path;an impermeable disposable upstream fluid pressure membrane at a location in the first fluid flow passage between the inlet and the flow restricting element; andan impermeable disposable downstream fluid pressure membrane at a location in the first fluid flow passage between the flow restricting element and the outlet; anda fluid impermeable reusable portion having: an upstream fluid pressure sensor to sense an upstream fluid pressure at an upstream location in the first fluid flow passage between the inlet and the flow restricting element, the upstream fluid pressure sensor being positioned and adapted to interact with the upstream fluid pressure membrane and thereby generally determine the fluid pressure at the disposable upstream fluid pressure membrane; anda downstream fluid pressure sensor to sense a downstream fluid pressure at a downstream location in the first fluid flow passage between the flow restricting element and the outlet, the downstream fluid pressure sensor being positioned and adapted to interact with the downstream fluid pressure membrane and thereby generally determine the fluid pressure at the disposable downstream fluid pressure membrane; anda processor adapted to control the infusion pump by varying the rate of flow of the first medication based on information provided by the differential pressure based flow sensor assembly, the processor further being adapted to determine the amount of the first medication provided to the patient. 38. The system of claim 37 further comprising: a user input device in communication with the processor, the user input device being adapted allow a user to provide information regarding the first medication. 39. The system of claim 38, wherein the processor is adapted to compare information about the first medication received from the user input device to patient treatment information for the patient. 40. The system of claim 38, wherein the processor is adapted to update the patient treatment information for the patient based on information provided by the user input device and the differential pressure based flow sensor assembly. 41. The system of claim 37 further comprising a fluid line adapted to deliver the first medication from the reservoir to the patient, the fluid line further having a fitting adapted to deliver a second medication from a second source. 42. The system of claim 41, wherein the second source is a syringe. 43. The system of claim 41, wherein the processor is adapted to determine the push rate of the second medication from the second source based on information provided by the differential pressure based flow sensor assembly. 44. The system of claim 43, wherein the processor is adapted to compare the push rate of the second medication to patient treatment information for the patient. 45. A method of delivering medication to a patient comprising: providing a differential pressure based flow sensor assembly to determine a flow rate of a first medication within a fluid line, the sensor assembly comprising: a fluid-tight disposable portion having: a sealed disposable body defining a fluid flow passage forming an inlet and an outlet;a flow restricting element positioned along the first fluid flow passage between the inlet and the outlet, wherein the flow restricting element includes an orifice that defines a non-capillary fluid flow path;an impermeable disposable upstream fluid pressure membrane at a location in the first fluid flow passage between the inlet and the flow restricting element; andan impermeable disposable downstream fluid pressure membrane at a location in the first fluid flow passage between the flow restricting element and the outlet; anda fluid impermeable reusable portion having: an upstream fluid pressure sensor to sense an upstream fluid pressure at an upstream location in the first fluid flow passage between the inlet and the flow restricting element, the upstream fluid pressure sensor being positioned and adapted to interact with the upstream fluid pressure membrane and thereby generally determine the fluid pressure at the disposable upstream fluid pressure membrane; anda downstream fluid pressure sensor to sense a downstream fluid pressure at a downstream location in the first fluid flow passage between the flow restricting element and the outlet, the downstream fluid pressure sensor being positioned and adapted to interact with the downstream fluid pressure membrane and thereby generally determine the fluid pressure at the disposable downstream fluid pressure membrane;sensing the flow rate of a first medication with the flow sensor assemblycontrolling an infusion pump that selectively varies the flow rate of the first medication, wherein the controlling is based upon information the flow sensor assembly provides a processor; anddetermining an amount of the first medication delivered to the patient, wherein the determining is based upon information the flow sensor assembly provides the processor. 46. The method of claim 45 further comprising: providing a reservoir containing the first medication to be delivered to a patient. 47. The method of claim 45 further comprising: delivering the first medication to the patient through a fluid line from a first source, the fluid line further having a fitting adapted to receive a second medication from a second source. 48. The method of claim 47 further comprising: delivering a second medication to the patient from the second source via the fitting. 49. The method of claim 48 further comprising: determining an amount of the second medication delivered to the patient, wherein the determining is based upon information the flow sensor assembly provides the processor. 50. The method of claim 49 further comprising: calculating the delivery rate of the second medication, wherein the calculating is based upon information the flow sensor assembly provides the processor. 51. The method of claim 47 further comprising: sending information about the first medication or the second medication to the processor;accessing patient specific treatment information with the processor;comparing the information about the first medication or the second medication with patient specific information;alerting a caregiver if either the first medication or the second medication is not located on the patient specific treatment information. 52. The method of claim 51 further comprising: updating the patient specific treatment information to show the amount of the first medication and the second medication delivered to the patient. 53. The method of claim 51 further comprising: generating guidelines for delivery of the second medication;delivering a second medication to the patient from the second source via the fitting;calculating the delivery rate of the second medication, wherein the calculating is based upon information the flow sensor assembly provides the processoralerting a caregiver if the delivery rate of the second medication does not generally conform to the generated guidelines for delivery of the second medication. 54. The method of claim 53 further comprising: delivering a second medication to the patient from the second source via the fitting;determining an amount of the second medication delivered to the patient, wherein the determining is based upon information the flow sensor assembly provides the processor; andalerting a caregiver if the amount of the second medication delivered to the patient does not generally conform to the patient specific treatment information.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (75)
Bischoff, Brian; Gooch, Robert, Adapter for coupling a sensor to a fluid line.
Selvan,Thirumani A.; Shenoy,Gururaj U.; Sadasivan,Saravanan; Muniraju,Raghavendra, Design of a wet/wet amplified differential pressure sensor based on silicon piezoresistive technology.
Kimball Victor E. ; Hindrichs Paul J. ; Honebrink Brian E. ; Gifford Rochell S., Disposable cartridge assembly with optional integrated temperature control system, and systems containing same.
Beran Anthony V. (1472 La Loma Dr. Santa Ana CA 92705) Shigezawa Gordon Y. (34 Cresthaven Irvine CA 92714), Endotracheal tube connector with integral pneumotach transducer.
Tucker, Jeffrey C.; Andersen, Brian L.; Mittelstadt, Robert, Fluid flow control system, fluid delivery and control system for a fluid delivery line, and method for controlling pressure oscillations within fluid of a fluid delivery line.
Spani Wayne M. (San Diego CA) Kemper William S. (San Diego CA), Interchangeable disposable acoustic for use with an ultrasonic flowmeter, particularly during extracorporeal measurement.
Barresi Thomas (Reno NV) Scalese Robert (Truckee CA) Riedi Eric (Reno NV) Frudden Jon E. (Reno NV) Hall Randy (Carson City NV) Nguyen Son (Sparks NV) Anderson Robert (Reno NV), Manual dispensing aid for a syringe.
Walker Richard Bradley (1960 Spectrum Cir. ; Ste. 235 Marietta GA 30067) Evans Robert F. (4909 Audobon Dr. Mobile AL 36619) Hanson Robert (5713 Regency Ct. North Mobile AL 36609) Burrow Michael F. (9, Medication delivery and monitoring system and methods.
Fowler James H. ; Patzer Charles R. ; Nicholson Warren B. ; Thompson Wendell ; Brunner Glenn D. ; Adams Theodore R. ; Shah Nilesh M., Modular medical pressure transducer.
Fowler James H. ; Patzer Charles R. ; Nicholson Warren B. ; Thompson Wendell ; Brunner Glenn D. ; Adams Theodore R. ; Shah Nilesh M., Modular medical pressure transducer.
Porat Yariv,ILX ; Tsaliah Yosef,ILX ; Doron Eyal,ILX, System and method for monitoring pressure, flow and constriction parameters of plumbing and blood vessels.
Ruchti, Timothy L.; Markey, Brian G.; Belkin, Anatoly S.; Kotnik, Paul T.; Khair, Mohammad M., Air detection system and method for detecting air in a pump of an infusion system.
Oruklu, Meriyan; Ruchti, Timothy L.; Kotnik, Paul T.; Belkin, Anatoly S., Infusion system which utilizes one or more sensors and additional information to make an air determination regarding the infusion system.
Oruklu, Meriyan; Ruchti, Timothy L.; Kotnik, Paul T.; Belkin, Anatoly S.; Markey, Brian G., Multi-sensor infusion system for detecting air or an occlusion in the infusion system.
Butler, Steven I.; Dunsirn, Todd M.; Frede, Douglas E.; Hedlund, Nancy G.; Polonus, Thomas F.; Pregulman, Steven J.; Ramaker, Torrance J.; Tillery, James E.; Van Huis, Mary Kaye, System and method for comparing and utilizing activity information and configuration information from multiple medical device management systems.
Ruchti, Timothy L.; Khair, Mohammad M., System for monitoring and delivering medication to a patient and method of using the same to minimize the risks associated with automated therapy.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.