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Biomedical subjects

D W Pearson

Publications and source records attributed to D W Pearson.

At least 55 records · Page 3Linked to original sources
PubMed1981

Pseudohypoparathyroidism presenting as severe Parkinsonism.

A case of pseudohypoparathyroidism in a middle-aged female presenting with severe Parkinsonism is reported. Correction of serum calcium led to marked clinical improvement suggesting that symptoms and signs were exacerbated by hypocalcaemia and tetanic spasm. Calcification of the basal ganglia was not detected on skull X-ray but was revealed by computerized axial tomography.

Brain Diseases↗
PubMed1981

Diabetic ketoalkalosis due to ectopic ACTH production from an oat cell carcinoma.

A diabetic patient is described who presented with the bizarre biochemical association of hyperglycaemia, ketosis and severe alkalosis. Investigation revealed hypercortisolaemia due to ectopic adrenocorticotrophic hormone secretion from an oat cell carcinoma of the bronchus and post-mortem studies demonstrated clinically unsuspected resolving pancreatitis. a possible mechanism for the metabolic upset is discussed.

Acidosis↗
PubMed1981

A comparison of skeletal uptakes of three diphosphonates by whole-body retention: concise communication.

Twenty normal volunteers had measurements of 24-hr whole-body retention (WBR) of three structurally related Tc-99m-labeled phosphonate skeletal imaging agents: (1-hydroxyethylidene) diphosphonate (HEDP), methylene diphosphonate (MDP), and hydroxymethylene diphosphonate (HMDP). The average WBR values, reflecting skeletal uptake, were 18.4, 30.3, and 36.6%, respectively. These results clearly illustrate that slight alterations in diphosphonate molecular structure have a significant effect upon specificity for osseous tissue, and thus may affect skeletal image quality and the usefulness of the WBR technique in diagnosing metabolic bone disease.

Adult↗
PubMedDate not supplied

The management of hypertension in a diabetic pregnancy.

Pregnancy in a woman with Type 1 diabetes poses several clinical challenges. In addition to meticulous glycaemic control, careful attention must be paid to the management of developing and pre-existing diabetic complications which may progress in severity during pregnancy. Pregnancy-induced hypertension is more common in women with diabetes and especially in those with diabetes of long duration. Diabetic renal disease is associated with hypertension which often deteriorates during pregnancy. The management of hypertension is difficult because of limited therapeutic options and the need to consider the implications for the developing fetus as well as the mother. This case report details the clinical management of a young woman with Type 1 diabetes whose pregnancy was complicated by the development of hypertension.

Adult↗
PubMedDate not supplied

Mortality in diabetes mellitus: experience of a geographically defined population.

A population-based cohort study identified 915 deaths in 4186 patients with diabetes mellitus over a 5-year period. Ischaemic heart disease, cerebrovascular disease and malignant neoplasms were the major causes of death and accounted for 40%, 16%, and 14% of deaths, respectively, compared with 27%, 14%, and 25% of deaths in the non-diabetic population. Diabetic patients had a standardized mortality ratio (SMR) of 1.15 (95% Cl 1.08-1.22) (p less than 0.001). This excess risk of death was largely due to the excess death from ischaemic heart disease (SMR 1.55 (1.40-1.71); p less than 0.001) and the impact was greatest in middle-aged female patients. Stroke mortality was not significantly increased (SMR 1.09 (0.92-1.29)) while cancer mortality was reduced (SMR 0.75 (0.63-0.89); p less than 0.01). Death rates in diabetic male patients (SMR 1.04 (0.96-1.13)) did not differ significantly from those in non-diabetic male patients because the increased risk of ischaemic heart disease deaths (SMR 1.41 (1.22-1.62); p less than 0.001) was offset by the reduced risk of deaths from malignant neoplasms (SMR 0.65 (0.51-0.82); p less than 0.001). The reduction in cancer mortality did not reach statistical significance in diabetic women (SMR 0.82 (0.64-1.05)). Diabetic nephropathy and metabolic disasters were uncommon as causes of death.

Adolescent↗
PubMedDate not supplied

Characteristics of A-150 plastic-equivalent gas in A-150 plastic ionization chambers for p(66)Be(49) neutrons.

The evaluation of a gas mixture having an atomic composition similar to that of A-150 tissue-equivalent (TE) plastic has been extended to a high-energy neutron therapy beam. "A-150" gas, air, and methane-based TE gas were each flowed through A-150 plastic-walled ion chambers of different sizes and irradiated with p(66)Be(49) neutrons. A tentative value for W(A-150) of 27.3 +/- 0.5 JC-1 was derived for this beam. The W value of the A-150 gas mixture is compared to those of methane-based TE gas and of air for the p(66)Be(49) neutron beam as well as to corresponding values found in similar experiments using 14.8-MeV monoenergetic neutrons.

Beryllium↗