Instrumentation for epidural anesthesia

TitleInstrumentation for epidural anesthesia
Publication TypeConference Paper
Year of Publication2007
AuthorsHor, K. - W., D. Tran, A. Kamani, V. Lessoway, and R. Rohling
EditorAyache, N., S. Ourdelin, and A. Maeder
Conference NameMedical Image Computing and Computer-Assisted Intervention- MICCAI 2007, Pt 2, Proceedings
Pagination918-925
PublisherSPRINGER-VERLAG BERLIN
Conference LocationHEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
ISBN Number978-3-540-75758-0
Abstract

A low-cost, sterilizable and unobtrusive instrumentation device was developed to quantify and study the loss-of- resistance technique in epidural anesthesia. In the porcine study, the rapid fall of the applied force, plunger displacement and fluid pressure, and the oral indication of the anesthesiologists were shown to be consistent with the loss-of-resistance. A model based on fluid leakage was developed to estimate the pressure from the force and displacement measurements, so that the pressure sensor could be omitted in human studies. In both human (in vivo) and porcine (in vitro) subjects, we observed that the ligamentum flavum is less amenable to saline injection than the interspinous ligament.

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