Effect of amusement park rides on programmable shunt valve settings.

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Strahle, J; Collins, K; Stetler, WR; Smith, BW; Garton, T; Garton, C; Garton, HJL; Maher, CO

Published Date

  • 2013

Published In

Volume / Issue

  • 49 / 1

Start / End Page

  • 21 - 23

PubMed ID

  • 24192584

Electronic International Standard Serial Number (EISSN)

  • 1423-0305

Digital Object Identifier (DOI)

  • 10.1159/000355247

Language

  • eng

Conference Location

  • Switzerland