1973
DOI: 10.1111/j.1469-8749.1973.tb05175.x
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Abstract: SUMMARY Two important problems in the treatment of hydrocephalus by valve shunts are hydraulic mis‐matching (mis‐matching of the type of valve to the patient's requirements) and mechanical mis‐matching (mis‐matching of CSZ pressure and ventricular size). This paper suggests a way of solving both probelms. It consists of the combination of a ball‐cone type of valve and a sensor device which adjusts the valve pressure according to the subdural stress. Subdural stress is the most important parameter in the treatm… Show more

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Cited by 57 publications
(15 citation statements)
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“…9 They are widely used despite a lack of randomized clinical trials or consensus regarding their benefit in shunt treatment of iNPH. 1,20,26 The iNPH guidelines 1 recommend starting with a high opening pressure and gradually lower it to reduce the frequency of complications, especially SDH.…”
Section: Discussionmentioning
confidence: 99%
“…9 They are widely used despite a lack of randomized clinical trials or consensus regarding their benefit in shunt treatment of iNPH. 1,20,26 The iNPH guidelines 1 recommend starting with a high opening pressure and gradually lower it to reduce the frequency of complications, especially SDH.…”
Section: Discussionmentioning
confidence: 99%
“…There are alternatives. Hakim [33] pointed out the mismatch of shunts to physiological needs over 30 years ago and suggests a servovalve shunt.…”
Section: Discussionmentioning
confidence: 99%
“…However, other data 1,2,11,[13][14][15][16]18,22,26,27,33,34 and our experience attest to the ability of PVs to obtain optimum pressures nonoperatively in the outpatient department in the first 6 months of life as an indication for continued use. This current study does not address this short postoperative period.…”
Section: Discussionmentioning
confidence: 91%
“…In 1973, Hakim 11 introduced a "servo valve" that would maintain optimal intracranial pressure without surgical intervention. With complications due in part to open revisions, there would be a theoretical clinical advantage to avoiding invasive procedures as well as providing potential cost savings as reported by some using PVs.…”
Section: 22mentioning
confidence: 99%