offers the ability to optimize the opening pressure of a shunt system before and after implantation. A shunted patient's condition will often change over the course of their treatment. The programmable valve allows a surgeon to non-invasively change the opening pressure between 30mm H2O and 200 mm H2O in 18 steps; negating the need for revision surgery to alter the valve pressure. The programmability of the valve may allow for the development of specialized treatment regimes. The opening pressure of the CODMAN HAKIM Programmable Valve is changed through the use of an externally applied, codified magnetic field. The spring in the ball and spring mechanism of the valve sits atop a rotating spiral cam which contains a stepper motor. Applying a specific magnetic field to the stepper motor will cause the cam to turn slightly, increasing or decreasing the tension on the spring and ball, thus changing the opening pressure of the valve. The CODMAN HAKIM Programmable Valve is available in eight basic configurations, and each of these configurations can be purchased with a unitized distal catheter or valve only.
SIPHONGUARD Anti-Siphon device is a unique new device for preventing excessive CSF flow during positional changes. The SIPHONGUARD device is integrated into the current Programmable and Precision Fixed Pressure Valve technologies, as well as a stand-alone device. The SIPHONGUARD device can be placed anywhere distal to the valve and is unaffected by scar tissue encapsulation or external pressure. The mechanical design detects the difference between the normal and excessive flow and closes the primary pathway only when excessive flow occurs. The secondary pathway is always open and allows for the slow release of CSF when the primary pathway is closed.
The SIPHONGUARD Anti-Siphon device never totally closes the shunt system but instead uses resistance to impede flow. The SIPHONGUARD device utilizes proven ball and cone technology, which is highly reliable.
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( 3 / 122 )The MIETHKE proGAV is a position-dependent valve.
This means that the opening pressure of the valve varies continuously with the patient´s body position. To adapt proGAV to the individual patient, one opening pressure is selected for the patient´s horizontal body position and one for the vertical position.
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( 3 / 113 )The CODMAN HAKIM Programmable Valve offers the ability to optimize the opening pressure of a shunt system before and after implantation. A shunted patient's condition will often change over the course of their treatment. The programmable valve allows a surgeon to non-invasively change the opening pressure between 30mm H2O and 200 mm H2O in 18 steps; negating the need for revision surgery to alter the valve pressure. The programmability of the valve may allow for the development of specialized treatment regimes. The opening pressure of the CODMAN HAKIM Programmable Valve is changed through the use of an externally applied, codified magnetic field. The spring in the ball and spring mechanism of the valve sits atop a rotating spiral cam which contains a stepper motor. Applying a specific magnetic field to the stepper motor will cause the cam to turn slightly, increasing or decreasing the tension on the spring and ball, thus changing the opening pressure of the valve. The CODMAN HAKIM Programmable Valve is available in eight basic configurations, and each of these configurations can be purchased with a unitized distal catheter or valve only.
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( 3 / 118 )The PS Medical® Strata® valve is an adjustable flow control valve in which the resistance properties of the valve can be changed non-invasively by the caregiver. It is designed to minimize overdrainage of cerebrospinal fluid (CSF) and maintain intraventricular pressure (IVP) within a normal physiologic range, regardless of patient position. The normally closed Delta® chamber mechanism opens in response to positive ventricular pressure. Working with the ball and spring valve mechanism, overdrainage is minimized by utilizing the principle of hydrodynamic leverage.
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( 2.9 / 121 )The Polaris® valve is a concentrated group of technological solutions allowing the much-desired concept of AN ADJUSTABLE VALVE COMPATIBLE WITH MRI to be achieved.
The Polaris® valve has been specifically designed to maximise the benefit of adjustable valves, both for the neurosurgeon and for his/her patient
A patented self-locking system
The completely original technical solutions developed and patented by SOPHYSA provide the POLARIS® valve with an exceptional level of safety, reliability and precision.
The principle of the POLARIS® adjustable pressure valve is based on the variation in pressure exerted on a ball by a semicircular spring at different points along its curvature. The flat semicircular calibrated spring determines an operating pressure. The spring is fixed to a rotor which can pivot within the body of the valve around its central ruby axis. Within this H-shaped rotor, two mobile shuttles are arranged which can slide along the H. Each shuttle contains a polarised micro-magnet in order to permanently attract the opposite shuttle. Each shuttle is equipped with a lug, designed to lock the rotor-shuttle system in indexing notches located on the wall of the valve body
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