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CODMAN® HAKIM® Programmable Valve

  • category: Hydrocephalus
  • focus: Programmable Valves

The cranial cavity contains one of the most interesting hydrodynamic systems within the human body, one that has historically engaged the attention of both engineer and neurosurgeon in a search for a better method for treating hydrocephalus. Physicians have traditionally been limited when faced with choosing the right fixed pressure valve prior to implantation. Even if chosen correctly at the time of implantation, surgical revisions may be required as the patient's pathophysiology changes. Basically, the patient is forced to adapt to a fixed pressure valve. With the advent of the CODMAN® HAKIM® Programmable Valve System, neurosurgeons can pre-select one of 18 different pressure settings. HAKIM is a registered trademark of Hakim USA, LLC and is used under license by Codman & Shurtleff, Inc. After implantation, the valve can be adjusted non-invasively to adapt to changes in patient condition. That means surgeons are able to make precise pressure adjustments to help control intracranial pressure and ventricle size at any time.
Unlike classic silicone shunt systems which only give surgeons three pressure ranges to choose from, the CODMAN HAKIM Programmable Valve features 18 pressure ranges.

These ranges provide the surgeon with the ability to make subtle alterations to the opening pressure. Each adjustment can be made quickly and easily through the programmer interface. Its precise mechanical design yields repeatable, linear pressure-flow responses. The micrometer scale (1/1000 mm) programming motions and tightly calibrated spring tensions which give the valve its accuracy are derived from the same microtechnology employed by the Swiss watch industry.

The same miniature manufacturing processes which make the valve accurate also make it reliable. Only superior materials that can stand up to the conditions evident in patients with hydrocephalus are chosen. The parts are also completely biocompatible, with the low profile of both the full housing and micro-housing resulting in an unobtrusive implant.

Once assembled, the valves are tested five separate times prior to release to ensure they meet stringent performance standards.

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Jul 24 2014 - 14:03:28