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Reproduced with permission from Codman/Johnson & Johnson. Fig 2. Medtronic Strata valve at various settings. Reproduced with permission from Medtronic Neurosurgery.
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The Strata valve has 5 settings or performance level (P/L), ranging from 0.5 to 2.5. Each level corresponds to a range of opening pressures and flow rates. The Medtronic Strata ® valve is an adjustable ball and spring valve. The tension of the valve’s spring can be altered utilizing a magnetic rotor mechanism integral to the valve. This adjustment is made non-invasively utilizing the hand-held StrataVarus adjustment tool to alter the magnetic rotor’s position and thus tension of the valve’s spring.
Instructions for Strata® Valve, StrataVarius® Adjustment
Position the system directly over the valve, with the red arrow 8. Lower the Adjustment Tool (magnet) straight into the cutout, pointing in the direction of fluid flow. with the blue arrow pointing to the current valve setting.
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Each level corresponds to a range of opening pressures and flow rates. The Medtronic Strata ® valve is an adjustable ball and spring valve. The tension of the valve’s spring can be altered utilizing a magnetic rotor mechanism integral to the valve. This adjustment is made non-invasively utilizing the hand-held StrataVarus adjustment tool to alter the magnetic rotor’s position and thus tension of the valve’s spring. 2004-09-01 Regarding therapies illustrated on this site:This therapy is not for everyone. Please consult your physician.
Reproduced with permission from Medtronic Neurosurgery.
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Valves were adjustable to five performance level settings by using Page 1 Strata Valve ® ADJUSTMENT REFERENCE GUIDE; Page 2 Strata Valve Adjustment Tools ® Preoperative Procedures READING THE PERFORMANCE LEVEL 1. Position the Locator Tool above the valve while it is still in the sterile 2.
On the basis of this multicentre prospective randomised trial it is to be recommended to treat patients with INPH with a
Medtronic (PS Medical) Strata Valve Strata valves and their flow-regulation adjustment can be identified in plain skull X-rays. MRI scanners up to 3 Tesla are quoted to be safe, but a post-MRI radiologic check of adjustment is recommended in literature. 2017-08-01 · A programmable valve such as the Medtronic Strata Adjustable Pressure valve allows the neurosurgeon the opportunity to adjust the valve pressure non-invasively based on clinical or radiographic findings in the post-operative setting , , .
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Position the Locator Tool above the valve while it is still in the sterile 2. Set the Indicator Tool (compass) into the Locator Tool packaging, so the blue arrows are pointing in the same direction as while aligning the red bands on the tools. 2010-02-11 In summary, the optimal setting for the treatment of a patient with iNPH is a VP shunt with an opening pressure of 5 cm H 2 O and a gravitational unit (shunt assistant, proSA), which will prevent overdrainage, at 20 cm H 2 O. Adjustability is beneficial for the patient, and the first adjustments should be performed at about 3 months after surgery.
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1344 Lollis AJNR 31 Aug 2010 www.ajnr.org Delwel EJ, de Jong DA, Dammers R, Kurt E, van den Brink W, Dirven CM (2013) A randomised trial of high and low pressure level settings on an adjustable ventriculoperitoneal shunt valve for idiopathic normal pressure hydrocephalus: results of the Dutch evaluation programme Strata shunt (DEPSS) trial. J Neurol Neurosurg Psychiatry 84:813–817.
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