Journal of Clinical Monitoring and Computing

, Volume 31, Issue 5, pp 1065–1072 | Cite as

Detection of spine structures with Bioimpedance Probe (BIP) Needle in clinical lumbar punctures

  • Sanna Halonen
  • Kari Annala
  • Juho Kari
  • Samuli Jokinen
  • Aki Lumme
  • Kai Kronström
  • Arvi Yli-Hankala
Original Research

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 bioimpedance-based tissue-sensing 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 tissue-classification 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.

Keywords

Spinal anesthesia Bioimpedance Needle guidance Monitoring Cerebrospinal fluid Epidural 

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Sanna Halonen
    • 1
    • 2
  • Kari Annala
    • 3
  • Juho Kari
    • 2
  • Samuli Jokinen
    • 4
  • Aki Lumme
    • 5
  • Kai Kronström
    • 2
  • Arvi Yli-Hankala
    • 4
    • 6
  1. 1.Department of Electronics and Communications EngineeringTampere University of TechnologyTampereFinland
  2. 2.R&D DepartmentInjeq LtdTampereFinland
  3. 3.Tampereen Lääkärikeskus LtdTampereFinland
  4. 4.Department of AnesthesiaTampere University HospitalTampereFinland
  5. 5.Pirkanmaan Sairaanhoitopiiri, Valkeakoski HospitalValkeakoskiFinland
  6. 6.Medical SchoolUniversity of TampereTampereFinland

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