Small-sized disposable pressure transducer apparatus with a temperature compensating circuit disposed adjacent a passageway coupled with a catheter
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United States of America Patent
Stats
-
Feb 11, 1992
Grant Date -
N/A
app pub date -
May 2, 1990
filing date -
May 2, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A blood pressure transducer apparatus having a semiconductor pressure sensor and a temperature compensating circuit mounted on a substrate which is fixedly mounted on a wall portion of a housing, with a fluid passageway being formed in the wall portion to be coupled with a fluid-filled catheter inserted into a blood vessel and being hydraulically coupled with the sensor. In order to improvement of temperature compensation, manufacturing yield and reliability as well as small-sizing the apparatus, the substrate has a first surface on which the sensor is mounted and an opposite second surface. The second surface is fixed at a partial area thereof to an abutment on an inner surface of the wall portion. The temperature compensating circuit is formed on the remaining area of the second surface so that the temperature compensating circuit is adjacent to the passageway.
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