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Pressure transducer apparatus with disposable dome

  • US 5,993,395 A
  • Filed: 04/18/1996
  • Issued: 11/30/1999
  • Est. Priority Date: 04/18/1996
  • Status: Expired due to Term
First Claim
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1. A disposable dome for use in combination with a reusable sensor to form a reusable transducer assembly for measuring pressure in a fluid line coupled to a catheter inserted into a living body for making direct pressure measurements of medical interest in areas within the body, said disposable dome being arranged to be engageable with and removable from the reusable sensor and discardable after a single use, said dome including an electrically and biologically isolating coupling media which transmits hydraulic pressure signals from a fluid-filled chamber in said dome to a pressure-sensitive diaphragm disposed on the reusable sensor;

  • the disposable dome being attachable to the reusable sensor using an interlocking structure, the interlocking structure defining an engagement and disengagement action between the dome and the reusable sensor which displaces the dome relative to the reusable sensor along an axis extending normal to said diaphragm, wherein said engagement and disengagement action of said diaphragm and said coupling media is non-frictional and non-twisting, the disposable dome further including structure for ensuring that the engaging and disengaging action between the dome and the reusable sensor is entirely normal to said diaphragm, and that there is no substantial action between the dome and the reusable sensor in a direction generally parallel to said diaphragm.

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