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MEASUREMENT OF THE FORCES AND MOVEMENTS INVOLVED IN NEONATAL HIP TESTING

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CHOW, YW, TURNER, I, Kernohan, George and MOLLAN, RAB (1994) MEASUREMENT OF THE FORCES AND MOVEMENTS INVOLVED IN NEONATAL HIP TESTING. Medical Engineering & Physics, 16 (3). pp. 181-187. [Journal article]

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URL: http://www.ncbi.nlm.nih.gov/pubmed/8061903

Abstract

The screening for Developmental Dysplasia of the Hip in infants relies on the two manipulative tests developed by Ortolani(6) and Barlow(7) which are often poorly performed. This study investigated the forces applied and the sequences of physical manoeuvres underlying the tests in order to define a standard of safe practice. Eight subjects examined the hips of two training models that closely simulated the behaviour of a range of infant hip pathologies. The forces applied and transducer system. The analysis concentrated on the peak forces and the biomechanical conditions necessary to detect an abnormality. The models' legs had to be abducted beyond certain critical angles in order to dislocate and relocate an unstable femoral head and the magnitude of the force required to dislocate the femoral head was significantly less than the peak force applied (72 N vs 33 N, p < 0.001). Also, the Palmen(8) test, a less well known technique, provided the same level of diagnostic performance as the Barlow test but with a lower peak applied force (28 N vs 47 N, p < 0.001). Changes are therefore necessary to the training programmes for medical staff to ensure that the range of abduction during the manoeuvres is large enough to encompass the likely range of critical angles and that the forces applied are just sufficient so as not to overstress the joints.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Nursing
Research Institutes and Groups:Institute of Nursing and Health Research
Institute of Nursing and Health Research > Managing Chronic Illness
ID Code:1284
Deposited By:Professor George Kernohan
Deposited On:27 Jan 2010 15:54
Last Modified:23 Jul 2012 14:52

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