External cerebrospinal fluid drain apparatus

Details External cerebrospinal fluid drain apparatus External cerebrospinal fluid drain apparatus

1995-12-01

1997-11-04

Weiss, John G.

Surgery

Devices transferring fluids from within one area of body to...

604 9, A61M 500

Patent

active

056833571

ABSTRACT:
An apparatus is disclosed for draining cerebrospinal fluid from within a patient's body to a location outside the patient's body. The novel apparatus features a fluid accumulator located serially between the ventricular catheter and the external location. The accumulator holds an amount of fluid which can flow bidirectionally between the patient and the accumulator so as to replenish any excess fluid that surges from the patient due to sudden, unexpected movements, such as sneezing, coughing, suddenly changing from recumbent to upright position and systolic contractions. The accumulator serves to maintain the height of the fluid column in the apparatus at a steady level, despite the sudden movements. Thus the hydrostatic pressure exerted on the cerebrospinal spaces by the fluid, which controls intracranial pressure, remains substantially constant.

REFERENCES:
patent: 2180042 (1939-11-01), Ettinger
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patent: 3889687 (1975-06-01), Harris et al.
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patent: 4621647 (1986-11-01), Loveland
patent: 4621654 (1986-11-01), Holter
patent: 4769002 (1988-09-01), Hooven
patent: 5405316 (1995-04-01), Magram
CSF-External Drainage and Monitoring Products Pudenz-Schulte Medical Corp., Goleta, CA, Brochure No. 10589-2, Dec. 1990.
Cordis ICP Monitoring and Drainage Sets . . . Cordis Corporation, Miami, FL, Brochure No. 152-3336-1, Sep., 1994.

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