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DEVICE FOR STERILE MEASUREMENT OF LIQUID OR GAS PRESSURES

  • US 3,818,765 A
  • Filed: 02/16/1972
  • Issued: 06/25/1974
  • Est. Priority Date: 02/17/1971
  • Status: Expired due to Term
First Claim
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1. An improved device for measurement of physiological fluid pressure comprising:

  • a pressure sensor provided with a pressure sensitive membrane for sensing the pressure of a fluid within a fluid circuit;

    a housing presenting a hollow pressure chamber, said housing including an integral external wall segment presenting a fluid impervious membrane disposed in fluid sealing relationship with respect to a peripheral area of said hollow chamber;

    means for connecting said housing to said circuit with said chamber in fluid communication with the interior of the circuit; and

    means for detachably securing said sensor to said housing with said membranes disposed in facing relationship and in intimate pressure transmitting surface contact with one another, said fluid impervious membrane being of substantially less rigidity than said pressure sensitive membrane to thereby isolate the pressure sensor from the chamber without substantially effecting the measurement of pressure thereby, whereby the sensor may be detached from the housing while the latter remains connected to the circuit and without affecting the pressure in the circuit, and whereby the housing and its fluid impervious membrane may be presterilized prior to the attachment thereof to the sensor.

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