Biomedical subjects

A D Hough

Publications and source records attributed to A D Hough.

3 recordsLinked to original sources

PubMed2002

M-mode ultrasound: a reliable measure of transversus abdominis thickness?

OBJECTIVE: The purpose of this study was to establish a reliable method for measuring transversus abdominis thickness in asymptomatic human subjects in supine lying, standing and walking. DESIGN AND METHODS: This was a single operator reliability study using ultrasound imaging to measure 22 subjects on three separate occasions. A purpose built high-density foam reinforced belt was used to house and position the transducer over the mid-point of the transversus abdominis. Each subject was imaged in supine, standing, and treadmill walking at 3 kph. Intraclass correlation coefficients and standard error of measurement analysis were used to measure the data. RESULTS: The correlation coefficient data analysis resulted in intraclass correlation coefficients of 0.94 (standard error of measurement 0.35) in supine lying, 0.88 (0.66) in standing and 0.88 (0.56) in walking. CONCLUSION: The method described is a reliable tool for measuring changes in thickness of transversus abdominis in supine lying, standing and walking. RELEVANCE: This procedure has the potential to detect dysfunctional changes in abdominal muscle activity for patients with low back pain in a functional setting.

Abdominal Muscles↗

PubMed2000

Peripheral nerve motion measurement with spectral Doppler sonography: a reliability study.

This study evaluates single operator test-retest reliability of spectral Doppler ultrasound measurement of median nerve excursion during wrist extension. Longitudinal motion of the median nerve was measured at the elbow on three occasions in both upper limbs of 16 healthy subjects using a standard colour Doppler ultrasound system. The mean of the three maximum velocity time integrals was calculated from the spectral Doppler sonogram of each test. Analysis of data with intraclass correlation coefficient indicated a high degree of repeatability (0.92). Spectral Doppler ultrasound may provide a valuable method for measurement of peripheral nerve motion and may have a role in the clinical assessment of entrapment syndromes.

Adult↗

PubMed2000

Measuring longitudinal nerve motion using ultrasonography.

While it is known that peripheral nerves slide longitudinally in response to limb movements, the clinical relevance of this phenomenon remains largely speculative. This technical note introduces a new application for noninvasive measurement of longitudinal movement of peripheral nerves. The rationale for developing the technique is given including a brief overview of nerve motion theories and how these are related to clinical practice. Current ultrasound applications for nerves and tissue motion are outlined and details of the Doppler measurement procedure are described. Limitations of the technique and potential future applications are discussed. Spectral Doppler ultrasound may provide an effective method for noninvasive quantification of longitudinal nerve motion.

Biomechanical Phenomena↗