METHOD OF REGULATING CSF DRAINAGE
First Claim
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1. An implantable drainage device for draining a patient'"'"'s cerebro-spinal fluid, the device comprising:
- a drainage valve comprising a valve member and a valve seat;
a control unit suitable for modifying an operating parameter of said valve, at least as a function of a measurement (D) of the fluid flow rate through said valve; and
an actuator controlled by the control unit, suitable for modifying the operation of said valve as a function of said operating parameter as modified by the control unit;
the device including a mass flowmeter suitable for evaluating said flow rate of fluid through said valve.
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Abstract
An implantable drainage device for draining the cerebro-spinal fluid of a patient, the device including:
- a drainage valve including a valve member and a valve seat;
- a control unit suitable for modifying an operating parameter of said valve, at least as a function of a measurement (D) of the fluid flow rate through said valve;
- an actuator controlled by the control unit, suitable for modifying the operation of said valve as a function of said operating parameter as modified by the control unit; and
- a mass flowmeter suitable for evaluating said flow rate of fluid through said valve.
13 Citations
21 Claims
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1. An implantable drainage device for draining a patient'"'"'s cerebro-spinal fluid, the device comprising:
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a drainage valve comprising a valve member and a valve seat; a control unit suitable for modifying an operating parameter of said valve, at least as a function of a measurement (D) of the fluid flow rate through said valve; and an actuator controlled by the control unit, suitable for modifying the operation of said valve as a function of said operating parameter as modified by the control unit; the device including a mass flowmeter suitable for evaluating said flow rate of fluid through said valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of controlling a valve of an implantable drainage device for draining the cerebro-spinal fluid of a patient, the method comprising regulation, and a setpoint flow rate (D*) being defined to a value that is less than the value needed for compensating exactly the production of cerebro-spinal fluid by the patient.
Specification