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bibliography * The PainScience Bibliography contains plain language summaries of thousands of scientific papers and others sources, like a specialized blog. This page is about a single scientific paper in the bibliography, Shih 2004.

Active patellar tracking measurement: a novel device using ultrasound

Shih YF, Bull AM, McGregor AH, Amis AA. Active patellar tracking measurement: a novel device using ultrasound. Am J Sports Med. 2004 Jul-Aug;32(5):1209–1217. PubMed #15262644.
Tags: patellar pain, running, knee, devices, etiology, biomechanics, arthritis, aging, pain problems, leg, limbs, overuse injury, injury, exercise, self-treatment, treatment, pro

PainSci summary of Shih 2004?This page is one of thousands in the bibliography. It is not a general article: it is focused on a single scientific paper, and it may provide only just enough context for the summary to make sense. Links to other papers and more general information are provided at the bottom of the page, as often as possible. ★★★☆☆?3-star ratings are for typical studies with no more (or less) than the usual common problems. Ratings are a highly subjective opinion, and subject to revision at any time. If you think this paper has been incorrectly rated, please let me know.

Shih et al. believe “that lateral patellar tilt and subluxation observed during arthroscopy of the extended knee may not represent a pathological condition.”

original abstract

BACKGROUND: Many patients suffer patellar instability that may relate to transient patellar tracking abnormalities.

OBJECTIVE: To develop and test a technique to measure dynamic patellar tracking.

STUDY DESIGN: Controlled laboratory and in vivo study.

METHOD: A functional knee brace was modified to allow an ultrasound transducer to be mounted laterally to the femur, following the path of the patella during knee movement. An ultrasound system was used to measure patellar mediolateral position parallel to the femoral transepicondylar axis. Ten subjects with no patellar instability were studied to obtain patellar tracking and accuracy data.

RESULTS: The interobserver and intraobserver reproducibility ranged from 0.2 +/- 0.1 mm to 1.0 +/- 0.5 mm. The accuracy of the ultrasound measurement was checked against magnetic resonance imaging and was 0.6 +/- 1.9 mm. The patella moved medially then laterally from extension to flexion when sitting. Squatting and stepping produced a more lateral path, without the initial medial translation. The patella was more lateral during knee extension than during flexion.

CONCLUSIONS: This novel method for measurement of dynamic patellar mediolateral tracking was found to have good intraobserver and interobserver reproducibility, and the measurements matched closely with those obtained from magnetic resonance imaging reconstructions of static patellar positions. Some preliminary data for tracking in 3 activities were obtained from 10 normal knees.

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This page is part of the PainScience BIBLIOGRAPHY, which contains plain language summaries of thousands of scientific papers & others sources. It’s like a highly specialized blog. A few highlights: