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Ultrasound vs pointer palpation based method in THA navigation: a comparative study.

Hartmuth Kiefer¹, Aneis Othman

¹Department of Orthopaedic and Trauma Surgery, Lukas Krankenhaus, Biinde, Germany.

|November 7, 2007

Summary

Ultrasound registration accurately determines the anterior pelvic plane during hip replacement surgery. Postoperative X-rays are unreliable for measuring anteversion due to persistent pelvic tilt.

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Point-of-Care Ultrasound: A Review of Ultrasound Parameters for Predicting Difficult Airways

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Published on: April 7, 2023

Area of Science:

Orthopedic Surgery
Medical Imaging
Surgical Navigation

Background:

Accurate intraoperative registration of the anterior pelvic plane is crucial for successful total hip arthroplasty (THA).
Traditional methods like manual pointer palpation can be prone to inaccuracies.
Ultrasound referencing offers a potential alternative for precise landmark identification.

Purpose of the Study:

To compare the accuracy of ultrasound registration versus manual pointer palpation for anterior pelvic plane registration in THA.
To evaluate the reliability of postoperative radiographs for assessing anteversion in THA patients.

Main Methods:

A consecutive series of 37 total hip arthroplasty cases were analyzed.
Ultrasound referencing of bony landmarks was used within a THA navigation system.
Accuracy was compared between ultrasound registration and manual pointer palpation techniques.

Main Results:

Postoperative radiographic anteversion measurements were consistently lower than those obtained via ultrasound or pointer navigation.
Ultrasound registration demonstrated high accuracy in identifying the bony landmarks of the anterior pelvic plane.
A significant pelvic tilt was observed in postoperative radiographs, attributed to pre-operative flexion contracture.

Conclusions:

Ultrasound registration provides a highly accurate method for determining the anterior pelvic plane during THA.
Postoperative radiographs taken two weeks after surgery are not ideal for evaluating anteversion due to residual pelvic tilt.
Ultrasound navigation systems offer improved accuracy for intraoperative pelvic plane registration in THA.