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Measurement of vertebral cortical integrity during pedicle exploration for intrapedicular fixation.

Publication ,  Journal Article
Myers, BS; Hasty, CC; Floberg, DR; Hoffman, RD; Leone, BJ; Richardson, WJ
Published in: Spine (Phila Pa 1976)
January 15, 1995

STUDY DESIGN: This study determined the predictive ability of electrical impedance measurement in detecting cortical perforation in a porcine model of pedicular exploration. OBJECTIVE: This study tested the hypothesis that a large decrease in electrical impedance would occur as a result of perforation of the vertebral cortex by the pedicle probe. SUMMARY OF BACKGROUND DATA: The resistivity of cortical bone has been reported to be 25 to 100 times greater than that of soft tissues. METHODS: A total of 42 pedicles of the lumbar spines of six swine were explored using the instrumented pedicle probes. RESULTS: Using a 1 microAmp 30-Hz current source, measurement of electrical impedance predicted cortical rupture with a sensitivity, specificity, and accuracy of 95%. Maximum applied voltages of 2.8 mV did not result in myogenic stimulus. CONCLUSIONS: Electrical impedance measurement provides an accurate real-time measurement of cortical perforation. This technique is adapted readily for use with pedicular screws and screw tape. Further investigation to determine the clinical use of this technique is recommended.

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Published In

Spine (Phila Pa 1976)

DOI

ISSN

0362-2436

Publication Date

January 15, 1995

Volume

20

Issue

2

Start / End Page

144 / 148

Location

United States

Related Subject Headings

  • Swine
  • Orthopedics
  • Monitoring, Intraoperative
  • Lumbar Vertebrae
  • Internal Fixators
  • Electric Impedance
  • Bone Screws
  • Animals
  • 4201 Allied health and rehabilitation science
  • 3209 Neurosciences
 

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Myers, B. S., Hasty, C. C., Floberg, D. R., Hoffman, R. D., Leone, B. J., & Richardson, W. J. (1995). Measurement of vertebral cortical integrity during pedicle exploration for intrapedicular fixation. Spine (Phila Pa 1976), 20(2), 144–148. https://doi.org/10.1097/00007632-199501150-00003
Myers, B. S., C. C. Hasty, D. R. Floberg, R. D. Hoffman, B. J. Leone, and W. J. Richardson. “Measurement of vertebral cortical integrity during pedicle exploration for intrapedicular fixation.Spine (Phila Pa 1976) 20, no. 2 (January 15, 1995): 144–48. https://doi.org/10.1097/00007632-199501150-00003.
Myers BS, Hasty CC, Floberg DR, Hoffman RD, Leone BJ, Richardson WJ. Measurement of vertebral cortical integrity during pedicle exploration for intrapedicular fixation. Spine (Phila Pa 1976). 1995 Jan 15;20(2):144–8.
Myers, B. S., et al. “Measurement of vertebral cortical integrity during pedicle exploration for intrapedicular fixation.Spine (Phila Pa 1976), vol. 20, no. 2, Jan. 1995, pp. 144–48. Pubmed, doi:10.1097/00007632-199501150-00003.
Myers BS, Hasty CC, Floberg DR, Hoffman RD, Leone BJ, Richardson WJ. Measurement of vertebral cortical integrity during pedicle exploration for intrapedicular fixation. Spine (Phila Pa 1976). 1995 Jan 15;20(2):144–148.

Published In

Spine (Phila Pa 1976)

DOI

ISSN

0362-2436

Publication Date

January 15, 1995

Volume

20

Issue

2

Start / End Page

144 / 148

Location

United States

Related Subject Headings

  • Swine
  • Orthopedics
  • Monitoring, Intraoperative
  • Lumbar Vertebrae
  • Internal Fixators
  • Electric Impedance
  • Bone Screws
  • Animals
  • 4201 Allied health and rehabilitation science
  • 3209 Neurosciences