Application of the flexiforce contact surface force sensor to continuous extraocular compression monitoring during craniotomy for cerebral aneurysms

Tatsushi Mutoh, Tatsuya Ishikawa, Hiromi Nishimura, Nobuyuki Yasui

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The aims of this study were to introduce our newly developed device equipped with a contact surface force sensor (FlexiForce) for monitoring extraocular compression continuously, and to illustrate its potential clinical application using this device in patients undergoing uncomplicated frontotemporal or bifrontal craniotomy for surgical clipping of unruptured anterior circulation aneurysms. In a pilot study with volunteers, we determined the critical force of 100 gf to cause painful ocular sensation. Then we performed the bilateral extraocular force measurements in 15 patients undergoing uncomplicated frontotemporal or bifrontal craniotomy for surgical clipping of unruptured anterior circulation aneurysms. Extraocular force increased immediately after retraction of the flap, increased to 144±26 gf (mean±SD) during lower craniotomy close to the orbit, was maintained at 91±18 gf during microsurgery, and returned close to baseline at 24±14 gf after restoration of skin flap retraction. Such changes were observed only on the surgical side in frontotemporal craniotomy. Abnormal increase in extraocular force was effectively reduced by placing a real-time digital panel meter to warn surgeons to avoid excessive skin flap retraction during the surgical procedure. In conclusion, this new tool may allow us to monitor the external forces that can be applied intraoperatively to the ocular globe in the supine position.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
JournalJournal of Neurosurgical Anesthesiology
Volume22
Issue number1
DOIs
Publication statusPublished - 2010 Jan 1
Externally publishedYes

Keywords

  • Aneurysm
  • Contact pressure
  • Craniotomy
  • Extraocular force
  • Perioperative complication

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology
  • Anesthesiology and Pain Medicine

Fingerprint Dive into the research topics of 'Application of the flexiforce contact surface force sensor to continuous extraocular compression monitoring during craniotomy for cerebral aneurysms'. Together they form a unique fingerprint.

Cite this