WO1991016609A1 - Dispositif de detection de la pression interne regnant dans des conduits flexibles - Google Patents

Dispositif de detection de la pression interne regnant dans des conduits flexibles Download PDF

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Publication number
WO1991016609A1
WO1991016609A1 PCT/EP1991/000761 EP9100761W WO9116609A1 WO 1991016609 A1 WO1991016609 A1 WO 1991016609A1 EP 9100761 W EP9100761 W EP 9100761W WO 9116609 A1 WO9116609 A1 WO 9116609A1
Authority
WO
WIPO (PCT)
Prior art keywords
line
pressure
movable plate
detection
pressure sensor
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP1991/000761
Other languages
German (de)
English (en)
Inventor
F. Baldo Veracchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INFUREX AG
Original Assignee
INFUREX AG
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
Priority to KR1019910701705A priority Critical patent/KR920701861A/ko
Application filed by INFUREX AG filed Critical INFUREX AG
Publication of WO1991016609A1 publication Critical patent/WO1991016609A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3639—Blood pressure control, pressure transducers specially adapted therefor
    • 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
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • A61M5/16854—Monitoring, detecting, signalling or eliminating infusion flow anomalies by monitoring line pressure

Definitions

  • the invention relates to a device for detecting the internal pressure conditions in flexible lines, preferably in tubular or pillow-shaped lines or flexible containers of medical technology, according to the preamble of claim 1.
  • a generic device for detecting the internal pressure conditions in flexible lines is known from US-A-33 76 750.
  • the device according to the invention it is possible on the one hand to maintain a high measuring sensitivity, but on the other hand to take into account the residual elasticity of the deformed lines, since the provision of the detection device intercepts the residual elasticity. There is the possibility for this after a short initial phase
  • the restoring force of the comfortable curved edge areas is determined in the transition period between the elastic and plastic deformation. This enables the determination of characteristic curves which reflect a base pressure, on the basis of which the measurement of the internal pressure conditions takes place. In other words, there is the possibility of preventing the internal pressure measurement results from being falsified by the deformation of the line.
  • the movable plate is preferably so light and is guided so smoothly that the weight of the movable plate and the friction losses in the guide are practically negligible.
  • a plunger On the side of the plate facing away from the line, a plunger is preferably attached, which can be provided with a convex support tip, the radius of curvature of which can be adapted depending on the application.
  • the plunger acts on the membrane of a sufficiently sensitive pressure sensor.
  • the above-mentioned curvature of the plunger tip can be used to influence the characteristic curve of the pressure sensor resolution.
  • the device according to the present invention it is in principle also possible for the device according to the present invention to be restricted to a single hose type, the characteristic of which is then stored as the only characteristic in the device.
  • FIG. 1 shows a schematically greatly simplified sectional illustration of the device according to the invention.
  • FIG. 2 shows a diagram to explain the mode of operation of a detection device of the device according to the invention.
  • the device 1 shows an embodiment of a device 1 according to the invention for detecting the internal pressure conditions in flexible lines in a greatly simplified representation. shows.
  • the device 1 according to the invention is particularly suitable for recognizing the internal pressure conditions in the case of hose-like or pillow-shaped flexible lines or containers of medical technology, since it has a very high sensitivity, which is required above all for medical purposes.
  • the device 1 has a pressure sensor 2, which can be designed in a conventional manner and comprises a pressure-receiving surface 3.
  • the device 1 has a transmission device 4, which effectively couples a line 5, the internal pressure conditions of which are to be recorded, to the pressure sensor 2.
  • the transmission device 4 of the device 1 comprises an immovable or stationary plate 6, which can be, for example, the part of a cover which can be folded up and down in a housing of the device 1 which is not shown in detail. Furthermore, the transmission device 4 has a movable plate 7, which is guided with low friction in the housing (not shown in detail) and is made as light as possible.
  • the movable plate 7 is connected to a plunger 8 on its side facing away from the line or container 5.
  • the plunger 8 preferably has a circular cross section and is connected at its free end to a convex contact part or head 9.
  • the curved end face region 10 can vary in its convexity. In any case, it is designed so that there is a point support of the system part 9 on the surface 3 of the pressure sensor 2.
  • the movable plate 7 In order to guide the movable plate 7 with as little friction as possible, it is in the embodiment shown in FIG. 1 guided via their plunger 8 in a sliding guide or sliding bearing 11, which can also be part of the housing.
  • Fig. 1 shows that the line 5 is clamped between the plates 6 and 7. This results in a prestressing of the line 5 in such a way that two wall sections 12 and 13 arranged essentially parallel to one another are formed. This type of prestressing increases the area of attack for the internal pressure of the line 5, so that a pressure transformation results on the sensor 2, since the plunger or its contact part 9 create an at least essentially punctiform support on the pressure sensor 2.
  • FIG. 1 shows that when the internal pressure of the line 5 is increased, the movable plate 7 is moved essentially in a direction which is perpendicular to the wall sections 12 and 13.
  • the device 1 according to the invention can also be provided with a shut-off device, not shown in FIG. 1, which completely blocks the line 5 if necessary.
  • the shut-off device 5 can preferably be connected to the pressure sensor 2 or to an evaluation unit and control device evaluating its signals, so that it is actuated or released by this control device when necessary.
  • the shut-off device may be necessary for safety reasons, for example in the field of medical technology, if it is necessary, for example, to shut off line 5 when certain pressure conditions occur, because this line is an infusion line or the like. represents.
  • the device 1 according to the invention is further provided with a detection device (not shown in detail), the function of which, however, results from the illustration in FIG. 2.
  • a detection device (not shown in detail), the function of which, however, results from the illustration in FIG. 2.
  • 1 are three basic pressure characteristic curves B, B and B are shown by way of example.
  • This base pressure characteristics 1 symbolize under ⁇ Kunststoffliche conductivity types, gene whose characteristics especially on the materials used and abscon ⁇ dimensions.
  • A can be determined, for example, by means of a mathematical model, on the basis of which the detection device, after determining the initial gradient G,
  • FIG. 1 some pressure surges are shown as an example to clarify the internal pressure measurement, which are illustrated as deflections on the basis pressure characteristic curves B to B.
  • the detection device can be provided with a memory which is loaded with experimentally determined characteristic curves of a large number of different lines, hoses or containers, so that a comparison can be made between the recorded geometric function and the stored characteristic curve what type of hose it is.
  • Device (1) for detecting the internal pressure conditions in flexible lines preferably hose-shaped or pillow-shaped flexible lines or containers of medical technology
  • the transmission device (4) having an immovable and a movable plate (6 or 7) between which the line (5) is arranged under prestress, the movable plate (7) effecting the coupling to the pressure sensor (2),
  • a detection device which determines the type of line by determining the restoring force in the transition period from the elastic state to the plastic state.
  • shut-off device can be actuated as a function of the measured pressure.
  • a unit is done. 13.
  • Device according to item 1 or 2 in which, for recognition, a comparator device is carried out for comparison between the determined pressure curve and experimentally determined pressure curves of different line types previously entered in a memory device.

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • General Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Cardiology (AREA)
  • Measuring Fluid Pressure (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

Un dispositif (1) de détection de la pression interne régnant dans des conduits flexibles (5) comprend une plaque fixe (6) et une plaque mobile (7) entre lesquelles le conduit (5) est précontraint. La pression interne est transmise par la plaque mobile (7), le cas échéant par un poussoir (8), à un capteur de pression (2). Ce dispositif (1) a une sensibillité élevée et permet de mesurer directement de l'extérieur la pression intérieure sans dispositifs accessoires.
PCT/EP1991/000761 1989-05-30 1991-04-19 Dispositif de detection de la pression interne regnant dans des conduits flexibles Ceased WO1991016609A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910701705A KR920701861A (ko) 1989-05-30 1990-05-11 강유전성 액정 표시 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013403A DE4013403C2 (de) 1990-04-26 1990-04-26 Vorrichtung zur Erkennung der Innendruckverhältnisse in flexiblen Leitungen
DEP4013403.2 1990-04-26

Publications (1)

Publication Number Publication Date
WO1991016609A1 true WO1991016609A1 (fr) 1991-10-31

Family

ID=6405188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/000761 Ceased WO1991016609A1 (fr) 1989-05-30 1991-04-19 Dispositif de detection de la pression interne regnant dans des conduits flexibles

Country Status (2)

Country Link
DE (1) DE4013403C2 (fr)
WO (1) WO1991016609A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996003168A1 (fr) * 1994-07-27 1996-02-08 Sims Deltec, Inc. Systeme de detection d'occlusion destine a une pompe a transfusion
US6077055A (en) * 1998-12-03 2000-06-20 Sims Deltec, Inc. Pump system including cassette sensor and occlusion sensor
EP1269145A4 (fr) * 2000-02-28 2008-03-12 Cardinal Health 303 Inc Ensemble capteur de force pour pompe a perfusion
US7347836B2 (en) 1992-09-09 2008-03-25 Smiths Medical, Inc. Drug pump systems and methods
WO2012006656A1 (fr) * 2010-07-12 2012-01-19 Custon Fluid Power Pty Ltd Dispositif de détection de pression
WO2013115852A1 (fr) * 2012-02-01 2013-08-08 Baxter Healthcare S.A. Ensemble de détection de pression pour pompe à perfusion
US8858526B2 (en) 2006-08-03 2014-10-14 Smiths Medical Asd, Inc. Interface for medical infusion pump
US8954336B2 (en) 2004-02-23 2015-02-10 Smiths Medical Asd, Inc. Server for medical device
US8952794B2 (en) 2006-08-03 2015-02-10 Smiths Medical Asd, Inc. Interface for medical infusion pump
US8965707B2 (en) 2006-08-03 2015-02-24 Smiths Medical Asd, Inc. Interface for medical infusion pump
EP2603257A4 (fr) * 2010-08-11 2017-11-15 Zevex, Inc. Capteur de pression et son procédé d'utilisation
US10682460B2 (en) 2013-01-28 2020-06-16 Smiths Medical Asd, Inc. Medication safety devices and methods
US10726100B2 (en) 2008-05-02 2020-07-28 Tandem Diabetes Care, Inc. Display for pump

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20206474U1 (de) * 2002-04-24 2003-09-04 B. Braun Melsungen Ag, 34212 Melsungen Drucksensor für Infusionsschlauchpumpen
GB2417052B (en) * 2004-08-12 2009-12-23 Single Use Surgical Ltd Pressure monitor for peristaltic pumps
DE102009049431B4 (de) * 2009-10-14 2018-12-06 Carl Zeiss Meditec Ag Ophthalmochirurgische Druckmessvorrichtung
JP5594541B2 (ja) * 2012-02-09 2014-09-24 Ｓｍｃ株式会社 圧力検出器
CN104155049B (zh) * 2013-05-15 2016-12-28 深圳市深科医疗器械技术开发有限公司 用于软管内流体压力检测的装置
EP3026413A1 (fr) * 2014-11-27 2016-06-01 Siemens Aktiengesellschaft Détermination d'une pression interne dans un tuyau sous pression
CN108986823A (zh) * 2018-09-27 2018-12-11 深圳市易控迪智能家居科技有限公司 一种语音识别解码器及语音操作系统
DE102019102432A1 (de) * 2019-01-31 2020-08-06 Technische Universität Dresden Schlauchpumpe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174637A (en) * 1978-10-19 1979-11-20 International Business Machines Corporation Pressure monitoring system
WO1984004685A1 (fr) * 1983-05-23 1984-12-06 Baxter Travenol Lab Procede et dispositif de detection differentielle d'occlusion
DE8520375U1 (de) * 1984-08-07 1985-10-31 Hospal Ag, Basel Peristaltische Pumpe mit einer Vorrichtung zur Messung des Druckes
EP0335385A2 (fr) * 1988-03-30 1989-10-04 Nikkiso Co., Ltd. Méthode et appareil pour détecter une occlusion d'un tuyau de transfusion
US4882575A (en) * 1987-01-28 1989-11-21 Sharp Kabushiki Kaisha Monitor for blocked condition in tube for fluid infusion pump
DE3838689C1 (en) * 1988-11-15 1990-06-28 Fresenius Ag, 6380 Bad Homburg, De Method for the continuous measurement of the pressure in a flexible fluid line for medical purposes, as well as a device for carrying out the method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376750A (en) * 1965-09-29 1968-04-09 R A Ekstrom Co Slack diaphragm fluid gauge
US3418853A (en) * 1966-01-10 1968-12-31 Statham Instrument Inc Blood pressure transducer
CA1081501A (fr) * 1977-11-10 1980-07-15 Ronald Price Instrument servant a mesurer les variations du diametre des canalisations de combustible diesel
GB2072349B (en) * 1980-03-18 1984-02-15 Gaeltec Ltd Conditioning pressure transducer outputs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174637A (en) * 1978-10-19 1979-11-20 International Business Machines Corporation Pressure monitoring system
WO1984004685A1 (fr) * 1983-05-23 1984-12-06 Baxter Travenol Lab Procede et dispositif de detection differentielle d'occlusion
DE8520375U1 (de) * 1984-08-07 1985-10-31 Hospal Ag, Basel Peristaltische Pumpe mit einer Vorrichtung zur Messung des Druckes
US4882575A (en) * 1987-01-28 1989-11-21 Sharp Kabushiki Kaisha Monitor for blocked condition in tube for fluid infusion pump
EP0335385A2 (fr) * 1988-03-30 1989-10-04 Nikkiso Co., Ltd. Méthode et appareil pour détecter une occlusion d'un tuyau de transfusion
DE3838689C1 (en) * 1988-11-15 1990-06-28 Fresenius Ag, 6380 Bad Homburg, De Method for the continuous measurement of the pressure in a flexible fluid line for medical purposes, as well as a device for carrying out the method

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7347836B2 (en) 1992-09-09 2008-03-25 Smiths Medical, Inc. Drug pump systems and methods
US5695473A (en) * 1994-07-27 1997-12-09 Sims Deltec, Inc. Occlusion detection system for an infusion pump
US5935106A (en) * 1994-07-27 1999-08-10 Sims Deltec, Inc. Occlusion detection system for an infusion pump
WO1996003168A1 (fr) * 1994-07-27 1996-02-08 Sims Deltec, Inc. Systeme de detection d'occlusion destine a une pompe a transfusion
US6077055A (en) * 1998-12-03 2000-06-20 Sims Deltec, Inc. Pump system including cassette sensor and occlusion sensor
EP1269145A4 (fr) * 2000-02-28 2008-03-12 Cardinal Health 303 Inc Ensemble capteur de force pour pompe a perfusion
US8954336B2 (en) 2004-02-23 2015-02-10 Smiths Medical Asd, Inc. Server for medical device
US10437963B2 (en) 2006-08-03 2019-10-08 Smiths Medical Asd, Inc. Interface for medical infusion pump
US9740829B2 (en) 2006-08-03 2017-08-22 Smiths Medical Asd, Inc. Interface for medical infusion pump
US8858526B2 (en) 2006-08-03 2014-10-14 Smiths Medical Asd, Inc. Interface for medical infusion pump
US10255408B2 (en) 2006-08-03 2019-04-09 Smiths Medical Asd, Inc. Interface for medical infusion pump
US8952794B2 (en) 2006-08-03 2015-02-10 Smiths Medical Asd, Inc. Interface for medical infusion pump
US8965707B2 (en) 2006-08-03 2015-02-24 Smiths Medical Asd, Inc. Interface for medical infusion pump
US10726100B2 (en) 2008-05-02 2020-07-28 Tandem Diabetes Care, Inc. Display for pump
US11488549B2 (en) 2008-05-02 2022-11-01 Tandem Diabetes Care, Inc. Display for pump
US11580918B2 (en) 2008-05-02 2023-02-14 Tandem Diabetes Care, Inc. Display for pump
US9574952B2 (en) 2010-07-12 2017-02-21 Custom Fluid Power Pty Ltd. Pressure detection device
WO2012006656A1 (fr) * 2010-07-12 2012-01-19 Custon Fluid Power Pty Ltd Dispositif de détection de pression
EP2603257A4 (fr) * 2010-08-11 2017-11-15 Zevex, Inc. Capteur de pression et son procédé d'utilisation
GB2514068B (en) * 2012-02-01 2018-08-29 Baxter Healthcare Sa Pressure sensing assembly for an infusion pump
WO2013115852A1 (fr) * 2012-02-01 2013-08-08 Baxter Healthcare S.A. Ensemble de détection de pression pour pompe à perfusion
GB2514068A (en) * 2012-02-01 2014-11-12 Baxter Healthcare Sa Pressure sensing assembly for an infusion pump
US10682460B2 (en) 2013-01-28 2020-06-16 Smiths Medical Asd, Inc. Medication safety devices and methods
US10881784B2 (en) 2013-01-28 2021-01-05 Smiths Medical Asd, Inc. Medication safety devices and methods

Also Published As

Publication number Publication date
DE4013403A1 (de) 1991-11-07
DE4013403C2 (de) 1994-06-30

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