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Titolo:
Analysis of design parameters for shunt valve and anti-siphon device used to treat patients with hydrocephalus
Autore:
Jang, JY; Suh, CM; Lee, CS;
Indirizzi:
Handong Global Univ, Sch Mech & Control Syst Engn, Kyungbuk 791708, South Korea Handong Global Univ Kyungbuk South Korea 791708 gbuk 791708, South Korea Kyungpook Natl Univ, Sch Mech Engn, Daegu 702701, South Korea Kyungpook Natl Univ Daegu South Korea 702701 , Daegu 702701, South Korea
Titolo Testata:
KSME INTERNATIONAL JOURNAL
fascicolo: 7, volume: 15, anno: 2001,
pagine: 1061 - 1071
SICI:
1226-4865(200107)15:7<1061:AODPFS>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRESSURE;
Keywords:
shunt valve; anti-siphon device (ASD); hydrocephalus; cerebrospinal fluid (CSF); siphon effect; subcutaneous pressure;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, CS Handong Global Univ, Sch Mech & Control Syst Engn, Kyungbuk 791708, South Korea Handong Global Univ Kyungbuk South Korea 791708 708, South Korea
Citazione:
J.Y. Jang et al., "Analysis of design parameters for shunt valve and anti-siphon device used to treat patients with hydrocephalus", KSME INT J, 15(7), 2001, pp. 1061-1071

Abstract

The present study investigated design parameters of shunt valves and anti-siphon device used to treat patients with hydrocephalus. The shunt valve controls drainage of cerebrospinal fluid (CSF) through passive deflection of a thin and small diaphragm. The anti-siphon device (ASD) is optionally connected to the valve to prevent overdrainage when the patients are in the standing position. The major design parameters influencing pressure-flow characteristics of the shunt valve were analyzed using ANSYS structural program. Experiments were performed on the commercially available valves and showedgood agreements with the computer simulation. The results of the study indicated that predeflection of the shunt valve diaphragm is an important design parameter to determine the opening pressure of the valve. The predeflection was found to depend on the diaphragm tip height and could be adjusted by the diaphragm thicknesss and its elastic modulus. The major design parameters of the ASD were found to be the clearance(gap height) between the thindiaphragm and the flow orifice. Besides the gap height, the opening pressure of the ASD could be adjusted by the diaphragm thickness, its elastic modulus, area ratio of the diaphragm to the flow orifice. Based on the numerical simulation which considered the increased subcutaneous pressure introduced by the tissue capsule pressure on the implanted shunt valve system, optimum design parameters were proposed for the ASD.

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Documento generato il 25/01/20 alle ore 00:28:17