A New Method to Intra-Operatively Measure Local Bone Strength in Osteoporotic Bone Using a Modified Surgical Tool-Reference-Cited by-同舟云学术

A New Method to Intra-Operatively Measure Local Bone Strength in Osteoporotic Bone Using a Modified Surgical Tool

Published:2014-10-14 Issue:4 Volume:8 Page:
ISSN:1932-6181
Container-title:Journal of Medical Devices
language:en
Short-container-title:

Author:

Liddle Kate¹,Buckley Jenni M.¹,Matitiyahu Amir¹,Marmor Meir¹

Affiliation:

1. Orthopaedic Trauma Institute, San Francisco General Hospital, University of California–San Francisco, 2550 23rd Street, Building 9, 2nd Floor, San Francisco, CA 94110 e-mail:

Abstract

The aim of this study was to test a novel method for intra-operative assessment of osteoporotic bone fracture strength using a surgical tool instrumented with a strain gauge and compare the device with cortical width (CW) measurements in the distal radius. The force needed to puncture the cortex (FNP) was quantified with the device and found to strongly correlate with bone mineral density (BMD) in the diaphysis (adj. R2 = 0.66, p < 0.001). Screw pullout studies were performed and correlation between FNP and screw pullout strength (SPS) was modest (adj. R2 = 0.34 with p < 0.05). CW correlated well with BMD (adj. R2 = 0.7, p < 0.0001) and SPS (adj. R2 = 0.5, p = 0.002) in the diaphysis. This technology may allow objective intra-operative assessment of bone strength to provide surgeons another tool for decision making on fixation strategies appropriate to the area of bone treated.

Publisher

ASME International

Subject

Biomedical Engineering,Medicine (miscellaneous)

Link

http://asmedigitalcollection.asme.org/medicaldevices/article-pdf/doi/10.1115/1.4028475/6237552/med_008_04_044508.pdf

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