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Title of Journal: J Clin Monit Comput

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Abbravation: Journal of Clinical Monitoring and Computing

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Springer Netherlands

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DOI

10.1016/0022-2011(80)90183-4

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ISSN

1573-2614

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Detection of spine structures with Bioimpedance Pr

Authors: Sanna Halonen Kari Annala Juho Kari Samuli Jokinen Aki Lumme Kai Kronström Arvi YliHankala
Publish Date: 2016/08/04
Volume: 31, Issue: 5, Pages: 1065-1072
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Abstract

Lumbar puncture is a relatively safe procedure but some serious even fatal complications can occur Needle guidance can increase puncture accuracy decrease the number of attempts and make the procedure easier We tested the feasibility of a bioimpedancebased tissuesensing technology for needle guidance in clinical use The Bioimpedance Probe BIP Needle has a removable BIP stylet enabling measurement of bioimpedance spectra during the procedure The BIP Needle is connected to a measurement device that uses tissueclassification software and the device provides audiovisual feedback when it detects cerebrospinal fluid CSF We performed spinal anesthesia with the BIP Needle in 45 patients The device performance and needle tip location were verified by an experienced anesthesiologist confirming CSF leakage The device detected CSF in all cases sensitivity of 100  Six cases with false detections lowered the specificity to 81  but in practice most of these were easy to differentiate from true detections because their duration was short and they occurred during backward movement of the needle The epidural spectrum differentiated as fatty tissue from surrounding tissues but the ligamentum flavum was not clearly detectable in the data The BIP Needle is a reliable tool for detecting CSF in lumbar puncture It can make the puncture procedure smoother as repeated CSF flow tests are avoided The correct needle tip location is immediately detected thus unnecessary needle movements close to spinal nerves are prevented Physicians could benefit from the information provided by the BIP Needle especially in patients with obesity or anatomic alterations

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