| 摘要 |
A resistive shunt valve (RSV) for draining cerebrospinal fluid. The RSV is comprised of a conduit housing and a valve member. The conduit housing is adapted for continuously conveying a flow of cerebrospinal fluid (CSF) with the valve member metering the flow of CSF therethrough. The valve member has a plurality of balls and at least one valve seat, with the number of balls being greater than the number of valve seats. The balls register within the valve seats in the direction of CSF flow. Small notches or irregularities are provided in the valve seats. Metering of CSF can be controlled by the housing diameter, ball diameter, number of balls, ball weight, irregularity of the valve seats, surface characteristics of the ball, and ball material.
|
