WO2010048088A4 - Infusion pump and method of in situ measuring the diameter of an infusion tube - Google Patents

Infusion pump and method of in situ measuring the diameter of an infusion tube Download PDF

Info

Publication number
WO2010048088A4
WO2010048088A4 PCT/US2009/061169 US2009061169W WO2010048088A4 WO 2010048088 A4 WO2010048088 A4 WO 2010048088A4 US 2009061169 W US2009061169 W US 2009061169W WO 2010048088 A4 WO2010048088 A4 WO 2010048088A4
Authority
WO
WIPO (PCT)
Prior art keywords
tubing
sensor
infusion pump
pump
signal indicative
Prior art date
Application number
PCT/US2009/061169
Other languages
French (fr)
Other versions
WO2010048088A1 (en
Inventor
Yu Zhou
Original Assignee
Baxter International Inc.
Baxter Healthcare S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baxter International Inc., Baxter Healthcare S.A. filed Critical Baxter International Inc.
Priority to EP09744534.0A priority Critical patent/EP2373359B1/en
Priority to CN200980142196.5A priority patent/CN102196832B/en
Priority to MX2011004243A priority patent/MX2011004243A/en
Priority to CA2739453A priority patent/CA2739453A1/en
Priority to JP2011533255A priority patent/JP5654997B2/en
Priority to ES09744534.0T priority patent/ES2452879T3/en
Publication of WO2010048088A1 publication Critical patent/WO2010048088A1/en
Publication of WO2010048088A4 publication Critical patent/WO2010048088A4/en
Priority to HK12101897.8A priority patent/HK1161155A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14212—Pumping with an aspiration and an expulsion action
    • A61M5/14228—Pumping with an aspiration and an expulsion action with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14212—Pumping with an aspiration and an expulsion action
    • A61M5/14232—Roller pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/082—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/14—Detection of the presence or absence of a tube, a connector or a container in an apparatus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3317—Electromagnetic, inductive or dielectric measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3334—Measuring or controlling the flow rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3375—Acoustical, e.g. ultrasonic, measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers

Abstract

An infusion pump (50) uses sensors (18,19,24) and a computer program to detect tubing (16) in a tube-loading section of the pump. The pump and the computer program also measures one or more of the tubing outer diameter, outer circumference, inner diameter, inner circumference, and tubing wall thickness. The infusion pump utilizes proximity sensors (18,19), such as an ultrasonic sensor, a capacitive sensor, or even an air-in-line sensor to detect proximity between two infusion pump surfaces, such as the surfaces that clamp the tubing in the pump, to determine thickness. At least one of the clamping surfaces is equipped with sensors (29) to indicate contact length of the tubing with the surface. Using these measurements, the tubing wall thickness and inner diameter can be determined. Knowing the actual tubing inner diameter, increased volumetric accuracy is possible, up to a three or four percent improvement over present measurements.

Claims

AMENDED CLAIMS received by the International Bureau on 03 May 2010 (03.05.2010)What is claimed is:
1. A method of measuring tubing (16) comprising: loading tubing (16) into a fixture (10); compressing the tubing (16) between opposed surfaces (12,14) of the fixture (10); receiving a signal indicative of compression of the tubing (16) while compressing, wherein the signal indicative of compression of the tubing (16) is indicative of a distance between the opposed surfaces (12,14) of the fixture (10); receiving a signal indicative of a contact length of the tubing (16) against at least one of the opposed surfaces (12,14); and calculating an inner diameter and a thickness of the tubing (16).
2. The method of Claim 1 , further comprising monitoring the signal indicative of compression of the tubing (16) or the signal indicative of the contact length.
3. The method of any one of the proceeding claims, wherein the opposing surfaces (12.14) include a stationary surface and a moveable surface and the signal indicative of compression of the tubing (16) is received from a sensor positioned on either of the stationary or the moveable one of the opposed surfaces (12,14).
4. The method of any one of the proceeding claims, wherein the signal indicative of compression of the tubing (16) is generated by an LVDT, an ultrasonic sensor (18,19), an air-in-line sensor, or a capacitive sensor (30).
5 . The method of any one of the proceeding claims, wherein the signal indicative of a contact length is generated by a sensor (26), a pressure sensor (26a,26b), a sensor array (24), a switch array (36), or a capacitive sensor (30).
6. The method of any one of the proceeding claims, wherein the opposed surfaces (12,14) are part of an infusion pump (50).
7, The method of any one of the proceeding claims, wherein the step of calculating calculates a diameter of the tubing (16) using two half-circles and a contact length of tubing (16) with the opposed surfaces (12,14).
8. The method according to any one of the proceeding claims, which includes: generating and receiving the signal indicative of compression of the tubing (16); and generating and receiving the signal indicative of the contact length of the tubing.
9. The method according to any one of the proceeding claims, wherein the step of calculating includes calculating an inner diameter of the tubing (16).
10. The method accordingly to any one of the proceeding claims, further comprising calculating a volume of liquid infusate using the calculated inner diameter.
11. An infusion pump (50) , the infusion pump (50) comprising: an inlet valve (52); an outlet valve (53); a shuttle (10) comprising a shuttle stationary portion (14) and a shuttle moveable portion (12) configured for squeezing a length of tubing (16) between the shuttle stationary portion (14) and the shuttle movable portion (12), wherein the shuttle moveable portion (12) moves toward and away from the shuttle stationary portion (14) to operate the infusion pump (50); a first sensor mounted on one of the movable portion (12) or the stationary portion (14) for detecting a distance between the movable portion (12) and the stationary portion (14); at least one second sensor (24) for detecting a contact length of tubing with at least one of the movable portion (12) and the stationary portion (14); and a controller (100) adapted to calculate an inner diameter and a thickness of the tubing (16).
12. The infusion pump (50) according to Claim 11, wherein the first sensor comprises an LVDT, an ultrasonic sensor (18,19), an air-in-line sensor, or a capacitive sensor (30).
13. The infusion pump (50) according to any one of Claims 11 and 12, wherein the second sensor comprises a sensor (26), a pressure sensor (26a,26b), a sensor array (24), a switch array (36), or a capacitive sensor (30).
14
14. The infusion pump (50) according to any one of Claims 11 to 13, further comprising a target (32) mounted on the other of the moving portion (12) and the stationary portion (14).
15. An infusion pump (60) , the infusion pump (60) comprising: a positive displacement pump for manipulating tubing (65) to accurately deliver a medicament; a first sensor (69) mounted on one of a movable portion (67) or a stationary portion (68) of the positive displacement pump for detecting a distance between the movable portion (67) and the stationary portion (68); and at least one second sensor (71) for detecting a contact length of the tubing (65) with at least one of the movable portion (67) and the stationary portion (68); and a controller (100) adapted to calculate an inner diameter and a thickness of the tubing (65) based on at least the distance between the moveable portion (67) and the stationary portion (68) of the tubing.
16. The infusion pump (60) according to Claim 15, wherein the positive displacement pump is a shuttle pump or a peristaltic pump.
17. The infusion pump (60) according to any one of Claims 15 and 16, wherein the first sensor (69) is an air-in-line sensor or a proximity sensor,
18. The infusion pump (60) according to any one of Claims 15 to 17. wherein the at least one second sensor (71) comprises two spaced-apart sensors (26) or microswitch.es (36).
19. The infusion pump (60) according to any one of Claims 15 to 18, wherein the controller (100) executes a computer program on a computer-readable disc for calculating the length, the thickness and the inner diameter of the tubing.
20. The infusion pump (60) according to any one of Claim 15 and Claims 17 to 19, wherein the infusion pump (60) is a linear peristaltic pump and the moveable portion (67) is one of a plurality of cam plates.
15
PCT/US2009/061169 2008-10-24 2009-10-19 Infusion pump and method of in situ measuring the diameter of an infusion tube WO2010048088A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP09744534.0A EP2373359B1 (en) 2008-10-24 2009-10-19 Infusion pump and method of in situ measuring the diameter of an infusion tube
CN200980142196.5A CN102196832B (en) 2008-10-24 2009-10-19 Infusion pump and method of in situ measuring the diameter of an infusion tube
MX2011004243A MX2011004243A (en) 2008-10-24 2009-10-19 Infusion pump and method of in situ measuring the diameter of an infusion tube.
CA2739453A CA2739453A1 (en) 2008-10-24 2009-10-19 Infusion pump and method of in situ measuring the diameter of an infusion tube
JP2011533255A JP5654997B2 (en) 2008-10-24 2009-10-19 Method for measuring the diameter of the infusion tube at the position of the infusion pump and in situ
ES09744534.0T ES2452879T3 (en) 2008-10-24 2009-10-19 Infusion pump and in situ measurement method of the diameter of an infusion hose
HK12101897.8A HK1161155A1 (en) 2008-10-24 2012-02-24 Infusion pump and method of in situ measuring the diameter of an infusion tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/258,183 2008-10-24
US12/258,183 US8105269B2 (en) 2008-10-24 2008-10-24 In situ tubing measurements for infusion pumps

Publications (2)

Publication Number Publication Date
WO2010048088A1 WO2010048088A1 (en) 2010-04-29
WO2010048088A4 true WO2010048088A4 (en) 2010-06-24

Family

ID=41682815

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/061169 WO2010048088A1 (en) 2008-10-24 2009-10-19 Infusion pump and method of in situ measuring the diameter of an infusion tube

Country Status (11)

Country Link
US (2) US8105269B2 (en)
EP (1) EP2373359B1 (en)
JP (1) JP5654997B2 (en)
CN (1) CN102196832B (en)
AR (1) AR073968A1 (en)
CA (1) CA2739453A1 (en)
ES (1) ES2452879T3 (en)
HK (1) HK1161155A1 (en)
MX (1) MX2011004243A (en)
TW (1) TWI543785B (en)
WO (1) WO2010048088A1 (en)

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