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Roxhed, Niclas

Stemme, Göran

Eklund, Anders

Malm, Jan

Johansson, Staffan

Jan Malm

Anders Eklund

Göran Stemme

Niclas Roxhed

Staffan Johansson

Nina Sundström

The disclosure relates to a cerebrospinal fluid (CSF) shunt for treatment of hydrocephalus, comprising a valve having an inlet port and an outlet port, which ports are for draining CSF, and a control port for regulating the drainage of CSF through the valve according to a hydrostatic pressure provided to the control port, which hydrostatic pressure is dependent on the body position of the patient. The disclosure further relates to a method for treatment of hydrocephalus comprising regulating drainage of CSF based on a hydrostatic pressure that is dependent on the body position of the patient.

Cerebrospinal fluid shunt for treatment of hydrocephalus

The present invention relates to a method and a device for determining the hydro-dynamic properties of the fluid system surrounding the brain and the spinal cord, the so called cerebrospinal fluid system, whereby the method comprises continuous pressure measurement through a fluid contact passage and active infusion of artificial cerebrospinal fluid through another fluid contact passage to a number of pressure-flow levels, and analysis of the connections between the measured pressures and flows. The method uses an adaptive way of procedure which on each pressure-flow level takes account for the measure time and the patient's fluctuations in physiologic signals for calculating in real time when the relation between the measure time and measure accuracy in pressure and flow on the actual pressure-flow level is sufficient and at an optimum, whereupon the investigation or examination is automatically proceeding to the next level according to a predetermined protocol. In this way, the method gives rise to an investigation with measurements having sufficient pressure and flow information on each level, which forms a base for determination in a correct manner, with an uncertainty estimate, of the patient's hydrodynamic parameters. The device comprises a hose pump () for infusion of artificial cerebrospinal fluid in a bottle or bag (), a standardized hose set including a pump hose () and pressure transducers () for continuous registration of the intracranial pressure, an invasive contact object () for creating fluid contact with the cerebrospinal fluid system and consisting of needles or a catheter, as well as a computer () with software for computerized collection and analysis as well as control of pump speed. The device uses a computerized implementation of the above-mentioned adaptive method in order to systematically and safely carry through a standardized protocol which generates pressure and flow information which the software of the measure system then uses for determining in real time and with an uncertainty estimate, the hydrodynamic parameters of the system.

Method and device for determining the hydrodynamics of the cerebrospinal fluid system

A method is described for using a postoperative CSF dynamical examination to determine the CSF dynamical state of the patient and the dynamical state of the CSF shunt in conjunction therewith.

Optimization of hydrocephalus shunt settings

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Umeå, Sweden

Jan Malm