Barrier coating on blood contacting devices
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United States of America Patent
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-
Nov 26, 1991
Grant Date -
N/A
app pub date -
Dec 8, 1989
filing date -
Dec 8, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A blood pressure monitoring device includes a pressure sensing element mounted or a probe tip or in a catheter tip adapted for insertion into a patient's blood stream. The element includes a pressure transducer having a micromachined diaphragm which flexes in response to pressure changes. The flexes are converted by the transducer to electrical signals which pass back through the catheter to a display. The element and the catheter are conformally coated with a thin layer of parylene which insulates the device from the deleterious effects which blood components such as water and ions would otherwise have on various components of the device.
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