Surgery – Truss – Pad
Patent
1977-10-11
1980-01-22
Kamm, William E.
Surgery
Truss
Pad
A61B 500
Patent
active
041844840
ABSTRACT:
Apparatus and method are disclosed for indicating and regulating the pressure of a selected body fluid such as an intracranial fluid. An elongated indicator tube is carried at least in part in a vented chamber which can be mounted so that the indicator tube is in a substantially vertical position. A flexible conduit conveys the selected body fluid from a catheter in the patient to the lower end of the indicator tube. By positioning the indicator tube so that the lower end is level with the in-dwelling end of the catheter, the extent of travel of the body fluid along the tube is a direct indication of the pressure of the body fluid. To provide an upper limit on the pressure the body fluid may attain, at least one opening is provided at a selected position in the wall of the indicator tube inside the chamber. This opening provides an upper pressure limit by permitting fluid to escape from the indicator tube into the chamber when the pressure is sufficient to cause the fluid to reach the opening. The chamber is vented so that compressed air inside the chamber does not affect the fluid pressure reading, and the extent of travel of the fluid inside the indicator tube represents the true pressure of the body fluid. Drainage means is provided for draining the chamber of any body fluid forced thereinto and the flexible conduit has an access port between the indicator tube and the catheter for sampling fluid or for injecting medicament.
REFERENCES:
patent: 3242920 (1966-03-01), Andersen
patent: 3362400 (1968-01-01), DeBella
patent: 3730168 (1973-05-01), McWhorter
Clifford Susan E.
Wright Ballard D.
Kamm William E.
Leach, Jr. Frank C.
Wright Ballard D.
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