An Easy-to-Use Portable Ultrasound Based Device for the Measurement of the Pelvic Tilt

4 pages•Published: July 12, 2018

Guillaume Dardenne, Jean-Philippe Pluchon, Aziliz Guezou-Philippe, Hoel Letissier, Chafiaa Hamitouche, Christian Lefèvre and Eric Stindel

Abstract

The orientation of the cup in Total Hip Arthroplasty plays a major role on the post- operative results. It has been considered for several decades that the cup should be oriented according to the safe zone defined by Lewinnek. However, this safe zone is not always suitable because of the inter-individual variability of the pelvic tilt during daily activities. We propose in this paper a non-invasive ultrasound based solution which can easily measure this patient specific parameter in order to thereafter otimise the cup orientation. The accuracy of this system was assessed with a specific pelvic phantom. A clinical pilot study was also performed on ten patients. The pelvic tilt was measured in three daily positions: the supine, sitting and standing positions. The average error was 1.15°±0.82°. The average pelvic tilt was -97.1°±28.6°, -46.3°±12.8° and -9.0°±8.3° for respectively the supine, the sitting and the standing positions. The high inter-individual variability of the pelvic tilt in different daily positions highlight the need to have a suitable device for the measurement of this patient specific parameter for THA. The proposed system is easy-to-use, portable and allows the pelvic tilt measurement in different positions without any additional x-ray radiation.

Keyphrases: measurement device, pelvic tilt, tha

In: Wei Tian and Ferdinando Rodriguez Y Baena (editors). CAOS 2018. The 18th Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery, vol 2, pages 39-42.

Links:	https://easychair.org/publications/paper/wvDs
	https://doi.org/10.29007/pwhr

BibTeX entry

@inproceedings{CAOS2018:Easy_Use_Portable_Ultrasound,
  author    = {Guillaume Dardenne and Jean-Philippe Pluchon and Aziliz Guezou-Philippe and Hoel Letissier and Chafiaa Hamitouche and Christian Lefèvre and Eric Stindel},
  title     = {An Easy-to-Use Portable Ultrasound Based Device for the Measurement of the Pelvic Tilt},
  booktitle = {CAOS 2018. The 18th Annual Meeting of the International Society for Computer Assisted Orthopaedic Surgery},
  editor    = {Wei Tian and Ferdinando Rodriguez Y Baena},
  series    = {EPiC Series in Health Sciences},
  volume    = {2},
  publisher = {EasyChair},
  bibsource = {EasyChair, https://easychair.org},
  issn      = {2398-5305},
  url       = {/publications/paper/wvDs},
  doi       = {10.29007/pwhr},
  pages     = {39-42},
  year      = {2018}}

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