| 摘要 |
<p>A self adjusting hydrocephalus valve (30) that continuously drains cerebrospinal fluid at a rate which is proportional to the average pressure difference across the valve. The valve employs a ball-in-cone mechanism having an associated biasing element (50) that is insensitive to high frequency pressure variations for regulating the opening of the valve mechanism (40). The biasing element includes flexible bellows (52) having a preset tension.
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