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. 2020 Apr:2020:V001T06A007.
doi: 10.1115/dmd2020-9056. Epub 2020 Jul 27.

An Evaluation of Sensing Technologies to Measure Intraoperative Leg Length for Total Hip Arthroplasty

Akash Chaurasia  1 , Jerry Yan  1 , Robert Li  1 , Kate McCarren  1 , Claire State  1 , Hannah Takasuka  1 , Evan Bender  1 , Aditi Jithendra  1 , Julius K Oni  2 , Amir Manbachi  1
Affiliations

An Evaluation of Sensing Technologies to Measure Intraoperative Leg Length for Total Hip Arthroplasty

Akash Chaurasia et al. Proc Des Med Devices Conf. 2020 Apr.

Abstract

Total hip arthroplasty (THA) procedures have been identified as high-volume procedures with growing prevalence. During the procedure, orthopedic surgeons largely rely solely on qualitative assessment to ensure an excessive limb length discrepancy (LLD) is not introduced from the implant selection. LLD can result in back pain and gait complications, with some cases of LLD requiring a revision procedure to mitigate. To address this issue, we evaluated several methods of sensing distance intraoperatively to determine the best approach to measure leg length during the THA procedure. A testing setup using a sawbones model of hip anatomy in the decubitus position was used as a simulation of the THA procedure to test the accuracy of each of the sensing modalities.

Keywords: Orthopaedic surgery; surgical tool; total hip arthroplasty.

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Figures

FIGURE 1:
FIGURE 1:
HIP PROSTHETIC COMPONENTS AND THEIR POSITIONING IN HIP ANATOMY
FIGURE 2:
FIGURE 2:
A DIAGRAM INDICATING IMPROPER HIP PROSTHESIS, WHICH CAUSES UNEVEN JOINT LOADING, RESULTING IN BACK AND JOINT PAIN
FIGURE 3:
FIGURE 3:
TESTING SETUP WITH SAWBONES MODEL REPLICATING THE LATERAL DECUBITUS POSITION DURING THA SURGERY. SCALE = 10 CM
FIGURE 4:
FIGURE 4:
A PLOT SHOWING THE TRUE VS. MEASURED DISTANCES FOR IR AND ULTRASONIC SENSORS ACROSS THE INTERVAL OF DISTANCES USED
See this image and copyright information in PMC

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