GB1344758A - Pressure transducers - Google Patents

Pressure transducers

Info

Publication number
GB1344758A
GB1344758A GB2852772A GB2852772A GB1344758A GB 1344758 A GB1344758 A GB 1344758A GB 2852772 A GB2852772 A GB 2852772A GB 2852772 A GB2852772 A GB 2852772A GB 1344758 A GB1344758 A GB 1344758A
Authority
GB
United Kingdom
Prior art keywords
pad
blood pressure
diaphragm
conduit
measured
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.)
Expired
Application number
GB2852772A
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.)
Millar Instruments Inc
Original Assignee
Millar Instruments Inc
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 Millar Instruments Inc filed Critical Millar Instruments Inc
Publication of GB1344758A publication Critical patent/GB1344758A/en
Expired 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
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
    • G01L9/0052—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance of piezoresistive elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0261—Strain gauges

Abstract

1344758 Probes MILLAR INSTRUMENTS Inc 19 June 1972 [1 July 1971] 28527/72 Heading A5R [Also in Division G1] In a fluid pressure transducer, e.g. for measuring blood pressure, a piezo-resistive strain gauge member 10 comprised of two individual elements in the form of a pair of pads 20a or 20b interconnected by a reduced neck portion 22a or 22b and having their pads bonded together via insulating material, has the pad of one element fixed to a diaphragm 14 subjected to the fluid pressure and the other pad to a fixed member 12 whereby flexure of the diaphragm causes compression in one neck portion and tension in the other, conductive material being provided on the surface of each pad to form electrodes. As shown, the diaphragm comprises a rigid centre portion 16 and a flexible outer portion 18 secured in an opening in the member 12. The member 12 may form the flattened tip of a catheter such that the transducer 10 is arranged inside the catheter tip, Figs. 4-7 (not shown). The catheter tip can be used to measure blood pressure inside the body or to measure blood pressure supplied to a chamber outside the body, Fig. 11 (not shown). The difference between two pressures can be measured by dividing a compartment by a member 12 in the form of a disc, Figs. 9 and 10 (not shown). The pressure of fluid flowing in a conduit can be measured by arranging the member 12 in a cut-out portion of the conduit, Figs. 12 and 13 (not shown).
GB2852772A 1971-07-01 1972-06-19 Pressure transducers Expired GB1344758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15888471A 1971-07-01 1971-07-01

Publications (1)

Publication Number Publication Date
GB1344758A true GB1344758A (en) 1974-01-23

Family

ID=22570137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2852772A Expired GB1344758A (en) 1971-07-01 1972-06-19 Pressure transducers

Country Status (6)

Country Link
JP (1) JPS522636B1 (en)
DE (1) DE2231491C3 (en)
FR (1) FR2144399A5 (en)
GB (1) GB1344758A (en)
IT (1) IT972231B (en)
NL (1) NL155364B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125561A (en) * 1982-07-30 1984-03-07 Cise Spa Improved transducer for measuring the pressure of a fluid, in particular an aggressive fluid and at high temperature
GB2154323A (en) * 1984-02-14 1985-09-04 Plessey Co Plc Pressure sensor
WO2005054777A1 (en) * 2003-12-05 2005-06-16 The Commonwealth Of Australia Strain gauge

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5918051B2 (en) * 1976-02-29 1984-04-25 三菱油化株式会社 catheter
DD260863A1 (en) * 1987-06-29 1988-10-12 Messgeraetewerk Zwonitz Veb K PRESSURE TRANSDUCER
ATE305264T1 (en) 2000-07-22 2005-10-15 Biotronik Mess & Therapieg IMPLANTABLE MEASURING DEVICE, IN PARTICULAR PRESSURE MEASURING DEVICE FOR DETERMINING INTRACARDIAL OR INTRALUMINAL BLOOD PRESSURE
JP6213527B2 (en) * 2015-06-30 2017-10-18 株式会社デンソー Pressure sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125561A (en) * 1982-07-30 1984-03-07 Cise Spa Improved transducer for measuring the pressure of a fluid, in particular an aggressive fluid and at high temperature
GB2154323A (en) * 1984-02-14 1985-09-04 Plessey Co Plc Pressure sensor
WO2005054777A1 (en) * 2003-12-05 2005-06-16 The Commonwealth Of Australia Strain gauge
US7536919B2 (en) 2003-12-05 2009-05-26 The Commonwealth Of Australia - Department Of Defence Strain gauge

Also Published As

Publication number Publication date
JPS522636B1 (en) 1977-01-22
DE2231491B2 (en) 1979-07-19
DE2231491A1 (en) 1973-01-11
DE2231491C3 (en) 1980-03-20
FR2144399A5 (en) 1973-02-09
NL7208976A (en) 1973-01-03
NL155364B (en) 1977-12-15
IT972231B (en) 1974-05-20

Similar Documents

Publication Publication Date Title
US3088323A (en) Piezoresistive transducer
US3946724A (en) Device for measuring pressure
US3724274A (en) Pressure transducers and method of physiological pressure transducers
US3703099A (en) Pressure transducer
US3748623A (en) Pressure transducers
US4445385A (en) Static pressure sensor with glass bonded strain gauge transducers
US4274423A (en) Catheter tip pressure transducer
US3710781A (en) Catheter tip pressure transducer
US4722348A (en) Catheter tip pressure transducer
US3811429A (en) Arterial pulse wave pressure transducer
US4574640A (en) Integrated dual-range pressure transducer
FR2579092B1 (en) IMPLANTABLE INTRACRANIAL PRESSURE SENSOR
GB1226998A (en)
GB1313935A (en) Pressure measuring transducer
ES1001567U (en) Pressure sensor
GB1263039A (en) Improvements in or relating to differential pressure transducers
US3123068A (en) bigliano
GB1344758A (en) Pressure transducers
IT1071114B (en) PRESSURE TRANSDUCER FOR FLUIDS AND INSTRUMENT FOR MEASURING PRESSURES INCORPORATING SUCH TRANSDUCER
US3148677A (en) Brachial transducer
US3473386A (en) Fluid fitting mounted pressure transducer
GB1389589A (en) Pressure receptor
US2549049A (en) Diaphragm type blood pressure gauge
US4563901A (en) Transducer
GB1391752A (en) Low-pressure measuring transducer

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee