EL‐SAYED, H, GOODALL, SR & HAINSWORTH, R 1995, 'Re‐evaluation of Evans blue dye dilution method of plasma volume measurement', Clinical & Laboratory Haematology, vol. 17, no. 2, pp. 189-194.
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Summary To simplify the method of plasma volume measurement by Evans blue dye dilution we used, for the first time, the same venous site for injection of dye and collection of samples. In a series of 49 studies the dye decay between 10 and 35 min after injection was highly linear (r = 0.991 ± 0.01), indicating that contamination of samples is very unlikely. We repeated the measurements after eight weeks in nine patients; the mean difference was 16.4±19.6 ml, indicating a high degree of reproducibility. We found that extrapolation of the dye decay curve to time zero is required for accurate estimates of plasma volume. There was good agreement between the estimates of plasma volume obtained by extrapolation from only three samples taken at 10, 20 and 30 min after dye injection with the results obtained using all six samples. We also found good agreement between the estimates of plasma volume obtained by using standard curves constructed from four standard dilutions of 1.25, 2.5, 5 and 10 mg/l and those obtained by the use of standard curves constructed from the blank and only one standard dilution of 10 mg/l. We therefore conclude that the Evans blue technique can be simplified with minimal loss of accuracy, by using only one venous site for injection and withdrawal, withdrawing only three samples between 10 and 30 min after injection and using a two point calibration line. © 1995 Blackwell Science Limited
Haas, MR, Rushworth, R & Rob, M 1995, 'Health Services And The Elderly An Evaluation Of Utilisation Data', Australian Journal On Ageing, vol. 14, no. 4, pp. 176-180.
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Medical and diagnostic services for people aged 65 and over comprise a substantial proportion of all services provided by the Health insurance Commission under the Medicare Benefits Schedule. To examine the utilisation of these services by people in this
General practice reform is occurring in a number of countries. Little is known, however, of the effects of remunerating general practitioners on the costs and outcomes of care. Valuable lessons can be learned for the scope and design of future research,
Towler, B, Irwig, L, Glasziou, PP, Haas, MR, Plunkett, A & Salkeld, G 1995, 'The Potential Benefits And Harms Of Screening For Colorectal-cancer', Australian Journal Of Public Health, vol. 19, no. 1, pp. 24-28.
Australian guidelines for colorectal cancer screening for average-risk populations vary from recommendations for annual screening by faecal occult blood testing for those over 40 years to recommendations that screening may be appropriate if requested by
Wilson, WH, Street, DJ & Halford, GS 1995, 'Solving proportional analogy problems using tensor product networks with random representations', IEEE International Conference on Neural Networks - Conference Proceedings, pp. 2971-2975.
This paper describes the use of vectors with randomly generated components for representing concepts in a system for solving proportional analogy problems using a memory based on a tensor product network. Both dense random vectors (all or most components non-zero) and sparse random vectors (most components zero) are used. In both cases systems which are able to solve proportional analogy problems were successfully produced: the degree of success varied with the number of components in the vectors and/or the proportion of non-zero components.