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Biomedical subjects

J D Chamberlain

Publications and source records attributed to J D Chamberlain.

4 recordsLinked to original sources

Prospective audit of treatment of paediatric febrile neutropenia in Australasia.

OBJECTIVES: Febrile neutropenia post-chemotherapy continues to impose a burden of morbidity and mortality on patients and families affected by childhood cancer, whereas these unplanned hospital admissions increase the financial cost of treating paediatric malignancies. There are currently no published national guidelines. This study comprises the first audit of current therapeutic practice in Australasia. METHODS: Information was sought prospectively from the 12 paediatric oncology tertiary referral centres in Australia and New Zealand regarding treatment of febrile neutropenia episodes commencing between 11 March and 10 May 2002. RESULTS: Data were returned on 127 episodes by nine centres. The median length of stay was 6 days and 18 different antibiotic regimens were implemented as first-line therapy. The median neutrophil count at the beginning and end of the febrile neutropenic episode was 0.0 x 10(9)/L (range 0.0 to 2.3 x 10(9)/L) and 0.7 x 10(9)/L (range 0.0 to 25.4 x 10(9)/L), respectively. Thirty per cent of episodes had positive blood cultures. Of these, 81% occurred in patients with tunnelled central venous catheters. The initial antimicrobial combination was changed in 61% of episodes. Outpatient antibiotics were used in 21% episodes after initial intravenous antimicrobial therapy. CONCLUSIONS: The current practice in Australasia is consistent with international guidelines, although changes are made more frequently to first-line therapy than in previous published studies. The central venous catheters are associated with a much higher risk of bacteraemia and consideration should be given to increased use of implanted port systems.

Adolescent↗

A 17-year epidemiological study on changes in lung function in toluene diisocyanate foam workers.

OBJECTIVE: To determine whether longitudinal declines in ventilatory capacity and the occurrence of respiratory symptoms in workers manufacturing polyurethane foam were related to toluene diisocyanate (TDI) exposure. METHODS: A population of workers from 12 UK factories was studied between 1981 and 1986 [8]. A survivor cohort of 251, of whom 217 were in the 1981-1986 study, was examined again in 1997-1998. Modified British Medical Research Council respiratory questionnaires and lung function measurements were completed for each of the 251 subjects at the beginning and end of the 17-year study period. Mean TDI exposures for all jobs in which subjects were employed were assessed and related to their occupational histories. RESULTS: The annual declines in 1-second forced expiratory volume (FEV(1)) and forced vital capacity (FVC) were not related to TDI exposure, and were typical of those measured in other populations not exposed to TDI. Over the study period the cold-foam handling group ( n=26) showed an increase in breathlessness and a significant excess decline in FVC; the exposed group ( n=175) showed an increase in wheezing (mainly smokers), whilst the low-exposure group ( n=50) showed a decrease in chest illness. Smoking and an increase in body weight both caused excess declines in FEV(1). CONCLUSIONS: This study does not provide evidence that there was any TDI-related decline in FEV(1) or in FVC over a 17-year period in workers exposed to TDI at the levels prevailing in the UK factories that manufactured flexible polyurethane foam.

Adult↗

An epidemiology study of lung function changes of toluene diisocyanate foam workers in the United Kingdom.

OBJECTIVE: To determine whether longitudinal declines in ventilatory capacity and the occurrence of respiratory symptoms in workers manufacturing polyurethane foam were related to toluene diisocyanate (TDI) exposure. METHODS: A population of 780 workers in 12 United Kingdom factories was followed for 5 years. Modified United Kingdom Medical Research Council (MRC) respiratory questionnaires and three or more lung function measurements were completed for each subject. Mean TDI exposures for all jobs in which subjects were employed were assessed by personal monitoring (2294 measurements) and related to their occupational histories. RESULTS: The United Kingdom 8-h and 15-min maximum exposure limits for TDI were exceeded in 4.7% and 19.0% of the samples taken, respectively. There was some increase in reported respiratory symptoms amongst exposed workers, but the annual declines of 1-s forced expiratory volume (FEV1) and forced vital capacity (FVC) were not related to TDI exposure and were typical of those observed in other longitudinal populations. FEV1 declines were smoking-related. Evidence was found suggesting that a small excess decline in FEV1 and FVC occurred in the first few years of employment for workers not previously exposed to TDI. CONCLUSION: This study does not provide evidence that there is a TDI-related decline in FEV1 and FVC in workers exposed to less than the United Kingdom 8-h occupational exposure limit of 5.8 ppb.

Adult↗