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Biomedical subjects

H C Wright

Publications and source records attributed to H C Wright.

11 recordsLinked to original sources
PubMed1996

A two-step procedure for the identification of children with developmental co-ordination disorder in Singapore.

The prevalence of Developmental Coordination Disorder (DCD) among 6- to 9- year-old Singaporean primary school children was studied from a random sample (N = 427) through a two-step identification procedure contained within Henderson's and Sugden's Movement Assessment Battery for Children. The prevalence rate from this two step procedure was 4% when the first step included the bottom 15% of the random sample. The two-step procedure moves towards fulfilling the diagnostic criteria for DCD set out by the American Psychiatric Association (DSM-IV) and the World Health Organisation (ICD-10) of a serious motor impairment in the development of motor coordination and significant interference with the activities of daily living not due in children to mental retardation or a known physical disability.

Child↗
PubMed1976

Hazards to bladder and intestinal tissues from intravesical underwater electrical discharges from a surgical electronic lithoclast.

Previous studies have shown that electronic lithoclast discharges produce effects resembling an underwater explosion. It was predicted that the shock wave produced by each discharge could damage nearby gas-containing gut through a mechanism known to be associated with underwater detonations. Effects associated with rapid oscillation of the vapour bubble produced could cause damage to the wall of the bladder. Investigation of lithoclast discharges in vivo on goat, and in vitro on sheep bladders demonstrated perforation of both. In vitro studies in the rabbit demonstrated the predicted greater susceptibility of air-filled gut over that filled with fluid. These hazards would be even greater in the ureter and caution in the use of electronic fragmentation of vesical and ureteric calculi is urged in the light of these findings.

Animals↗
PubMed1976

Mode of action of a surgical electronic lithoclast--high speed pressure, cinematographic and schlieren recordings following an ultrashort underwater electronic discharge.

In order to investigate the mode of action of the electrical discharges from a surgical electronic lithoclast in shattering bladder stones high speed pressure-time recordings were made. The results indicated effects similar to those following an underwater detonation of high explosive. Subsequent high speed photographic analysis confirmed this. Calculations based on the results suggested that the shock waves and pressure pulses generated were of a potentially hazardous magnitude and that gas-containing bowel close to the bladder might be at particular risk as well as solid tissue as the bladder wall. Photographic data also suggested that danger might be incurred by the use of similar devices in a small enclosed space such as the ureter or renal pelvis.

Calculi↗