Accuracy of a new navigation system for total hip replacement

Not Applicable

Completed

• Conditions: Surgery - Surgical techniques; Hip Rheumatoid Arthritis; Musculoskeletal - Other muscular and skeletal disorders; Hip Osteoarthritis; Musculoskeletal - Osteoarthritis; Osteonecrosis of the Femoral Head

• Registration Number: ACTRN12620000089932
• Lead Sponsor: John Ireland

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2020-02-03
• Study Completion: 2021-10-04
• Last Update Posted: 22 January 2024

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 34

Inclusion Criteria

Patients eligible for primary elective THA using an anterolateral approach in the supine position

Exclusion Criteria

Patients who have declined or revoked consent for use of clinical data for research, or unable to provide informed consent.

Patients requiring/electing to have simultaneous bilateral procedures

Patients with severe contralateral hip deformity or dysplasia

Patients eligible for insertion of a short-stem component

Patients with previous ipsilateral hip arthroplasty eligible for revision

Study & Design

• Study Type: Observational
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Validity of Naviswiss measurements of acetabular cup inclination.<br>Assessed by comparison between intraoperative Naviswiss and postoperative CT-based measurements (standard error of measurement).<br>[ 6-12 weeks postoperative];Validity of Naviswiss measurements of acetabular cup anteversion.<br>Assessed by comparison between intraoperative Naviswiss and postoperative CT-based measurements (standard error of measurement).<br>[ 6-12 weeks postoperative];Validity of Naviswiss measurements of change in femoral offset pre-post implant.<br>Assessed by comparison between intraoperative Naviswiss measurements, and pre and postoperative CT-based measurements (standard error of measurement).[ 6-12 weeks postoperative]

Secondary Outcome Measures

Name	Time	Method
Validity of Naviswiss measurements of change in leg length pre-post implant.<br>Assessed by comparison between intraoperative Naviswiss measurements, and pre and postoperative CT-based measurements (standard error of measurement).[ 6-12 weeks postoperative];Inter-observer reliability of CT measurements. Two external observers will perform measurements of the listed outcomes using medical image analysis software, on a random selection of ten cases.[ 6-12 weeks postoperative];Intra-observer reliability of CT measurements. One observer will perform measurements of the listed outcomes using medical image analysis software, on a random selection of ten cases twice, with each measurements made at least two weeks apart.[ 6-12 weeks postoperative]