Effect of amusement park rides on programmable shunt valve settings.
Pediatr Neurosurg
; 49(1): 21-3, 2013.
Article
em En
| MEDLINE
| ID: mdl-24192584
ABSTRACT
BACKGROUND:
Magnetically programmable shunt valves are susceptible to environmental factors including magnetic fields and accelerative forces. It is unknown if rollercoasters with or without magnetic brakes or linear induction motors (LIMs) are capable of altering the setting of a programmable shunt valve.METHODS:
Two different valve types (type A, n = 10; type B, n = 9) were tested at varying resistance settings in 2 trials on 6 different amusement park rides including 2 rides with LIMs, 2 rides with magnetic brakes, and 2 rides without magnetic technology.RESULTS:
The performance level of valve type A and the setting of valve type B changed on rollercoasters with magnets (A = 2.5% [2/80]; B = 5.6% [4/72]) and without magnets (A = 7.5% [3/40]; B = 2.8% [1/36]). Neither valve setting changed when exposed to a Ferris wheel or during ambulation throughout the park.CONCLUSION:
Magnetically programmable valves are susceptible to changes in pressure settings when exposed to amusement park rides with elevated vertical gravitational forces, irrespective of the presence of LIMs or magnetic brakes.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Derivações do Líquido Cefalorraquidiano
/
Campos Magnéticos
/
Aceleração
/
Hidrocefalia
/
Atividades de Lazer
Tipo de estudo:
Etiology_studies
/
Risk_factors_studies
Limite:
Child
/
Humans
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article