Pressure sensor apparatus. [for sensing fluid pressure in body cavities using radioactive fluids]
A pressure sensor apparatus primarily for sensing pressure in a body cavity such as the cranium, bladder or vena cava of an animal or human comprising a housing having non-radioactive fluids contained in two spaced apart regions of the housing is described. A radioactive fluid immiscible with at least one of the non-radioactive fluids is also contained within the housing between the nonradioactive fluids. The interface between the radioactive fluid and one of the non-radioactive fluids is optionally formed by a resilient member such as an elastomeric diaphragm. A flexible member is connected to the housing and communicates with one of the two spaced apart regions in the housing. The other spaced apart region in the housing is closed by a resilient member such as a metallic diaphragm. With this arrangement, the movement of the radioactive fluid is proportional to the pressure sensed by the flexible member and is sensed by a radiation detector. 9 claims, 5 figures.
- Assignee:
- Hittman Corp.
- Patent Number(s):
- US 4006735
- Application Number:
- TRN: 77-009381
- OSTI ID:
- 7317382
- Resource Relation:
- Patent File Date: Filed date 16 Jul 1974
- Country of Publication:
- United States
- Language:
- English
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47 OTHER INSTRUMENTATION
BODY FLUIDS
PRESSURE MEASUREMENT
PRESSURE GAGES
DESIGN
BLADDER
HEAD
RADIOISOTOPES
BIOLOGICAL MATERIALS
BODY
BODY AREAS
ISOTOPES
MEASURING INSTRUMENTS
ORGANS
URINARY TRACT
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