Open AccessMeasurement of Intraoperative Range of Motion of Total Hip Arthroplasty Using an Inertial Measurement Unit Based Smart Trial System: an in Vitro Validation Experiment
Author(s) -
Hao Tang,
Yixin Zhou,
Baojun Mai,
Bo Zhu,
Ping Chen,
Yujia Fu
Publication year - 2018
Publication title -
epic series in health sciences
Language(s) - English
Resource type - Conference proceedings
ISSN - 2398-5305
DOI - 10.29007/jmjj
Subject(s) - range of motion , subluxation , arthroplasty , inertial measurement unit , medicine , computer science , biomedical engineering , surgery , artificial intelligence , alternative medicine , pathology
Intraoperative detection of hip Range of Motion ( ROM ) is the basis for prediction of postoperative functional limits allowed for patients’ daily living. Although computer navigation system for Total Hip Arthroplasty ( THA ) has improved the accuracy of intraoperative ROM evaluation, it has not been able to gain popularity because of its complex and time-consuming procedures. We preliminarily developed a Inertial Measurement Unit based Hip Smart trial system ( IMUHS ) that is easy and simple to use. An in vitro validation experiment was conducted using radiopaque sawbones with imaging measurement method as the reference standard. The validity of measuring ROM in the three axes was as follows: 4.36±4.93°for flexion and extension, 1.75 ± 5.21°for adduction and abduction, and 6.42 ± 4.32°for internal and external rotation( p = 0.059 ~ 0.550 ). The ICC values of measuring ROM in all three axes were 1.00. As measuring ROM is the basis for evaluating direction of impingement, subluxation and dislocation, the IMUHS is a promising development direction of THA computer assisted surgery.