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Biomedical subjects

O M Edwards

Publications and source records attributed to O M Edwards.

At least 37 records · Page 2Linked to original sources

Toxic shock: clinical presentation and management. II.

The management of toxic shock syndrome poses a challenge to clinicians because the syndrome has only been recently recognized and new complications are still being described. This report describes the major complications which arose in our case and highlights a severe bleeding disorder which was the cause of the patient's death. The bleeding disorder was characterized by normal in vitro coagulation screens, normal platelet aggregation tests, but prolonged skin bleeding time. It was not improved by haemodialysis, platelet transfusion or steroid therapy. We conclude that in cases with severe toxaemia, despite early recognition and appropriate treatment, there is still no effective method of preventing complications. Current avenues for investigation include plasmapheresis, the administration of fresh frozen plasma, and the development of a specific anti-toxin.

Acute Kidney Injury↗

Mild hypothyroidism and oedema: evidence for increased capillary permeability to protein.

Nine female patients with normal serum total thyroxine (T4) and triiodothyronine (T3) but elevated thyroid stimulating hormone (TSH) levels were studied. Six patients had generalised oedema associated with maximal diurnal weight gains in excess of 1.4 kg. Under conditions of forced water diuresis, before and during physiological replacement of 1-thyroxine, the supine transcapillary escape rate of albumin (TERA) was measured, while the venous colloid osmotic pressure (COP), packed cell volume (PCV) and urinary excretion of water and electrolytes were studied in both the supine and upright positions. The TERA, diurnal weight gain and orthostatic increase in COP fell significantly with treatment. In the six patients with oedema and excessive diurnal weight gains, the retention of salt and water on tilting was reduced with thyroxine treatment. In female patients we consider generalised oedema associated with excessive diurnal weight gain, to be a common and early symptom of hypothyroidism, meriting thyroxine replacement therapy.

Adult↗

Corticosterone-secreting tumours: with and without renal artery stenosis.

Two cases of corticosterone-secreting adrenal adenomata are reported. Both patients were middle-aged females in whom the clinical course spanned several years before the diagnosis was made. Severe hypertension and recurrent hypokalaemia refractory to standard treatments were outstanding features. The importance of measuring the production rates of all mineralocorticoids when a tumour is suspected is emphasized by Case 1 where the production rate of corticosterone alone was elevated. Bilateral renal artery stenosis was responsible for unsuppressed plasma renin activity in Case 2.

Adenoma↗

Edema.

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Adult↗

Idiopathic oedema: a study of the effects of bromocriptine.

We have studied the effect of bromocriptine in seven patients with idiopathic oedema. Two patients were unable to tolerate the drug; the remaining five were maintained on doses of between 5 and 7.5 mg a day. Symptomatic improvement was noted in two patients and in both of these and one other there was a significant improvement in mean diurnal weight gain. The fall in free water and sodium clearance on standing was reduced by bromocriptine, but there was no significant change in the excessive fall in plasma volume.

Adult↗

The management of thyroid disease in pregnancy.

The management of hyperthyroidism and hypothyroidism in pregnancy is discussed and illustrated with appropriate cases. The dangers of the usage of high doses of antithyroid drugs and of propranolol are described.

Adult↗

Autoimmune thyroid disease and the polymyalgia rheumatica-giant cell arteritis syndrome.

In a study of 250 patients with autoimmune thyroid disease, seven (2.8%) were found to have polymyalgia rheumatica or giant cell arteritis. All cases occurred in female patients over the age of 60 years, a prevalence in this group of 9.3%. No cases of either disorder were seen in a control population of 150 female patients over the age of 50 years attending a cardiac clinic at the same hospital. Awareness of this association may allow earlier diagnosis and treatment of this syndrome in elderly patients with thyroid disease.

Aged↗

Thyroidal hormone metabolism in obesity during semi-starvation.

Six obese subjects were studied over a period of 12 weeks whilst on a 1260 kJ (300 kcal) formula diet. Weight loss was initially rapid, but later slowed markedly despite good patient compliance. The basal metabolic rate (BMR) fell in all patients during the study. Plasma triiodothyronine fell in all patients, whilst the plasma half-life of thyroxine increased. Plasma thyroxine, reverse triiodothyronine (reverse T3) and the serum prolactin and thyrotropin response to thyroliberin all showed no significant change.

Adult↗

Idiopathic oedema of women. A clinical and investigative study.

A clinical and investigative study is reported of 19 patients with 'idiopathic oedema of women'. The resons for defining this as a specific syndrome unrelated to the menstrual cycle are given, and the clinical features reviewed. During a forced water diuresis the flow and composition of the urine and the plasma volume were studied on tilting from the supine to the upright position seven premenopausal and four postmenopausal patients with this disorder. No differences were found in the results obtained in the follicular and luteal phases of the menstrual cycle or in the pre- and post-menopausal patients. The reductions in urinary volume and electrolyte excretion on upright tilting were greater than those observed under similar circumstances during the luteal phase of the menstrual cycle in normal female controls, and attributed to increased proximal renal tubular reabsorption. The rate of loss of isotopically labelled albumin from the intravascular compartment was greater in patients with idiopathic oedema than in control subjects. A reduction in blood volume on tilting occurred in control subjects and patients with idiopathic oedema, but was greater in the latter; and the larger the fall, the greater were the reductions in urinary flow and electrolyte excretion. The effect of administering 9-alpha-fluorohydrocortisone was studied in nine patients with idiopathic oedema. One patient failed to 'escape' from the sodium-retaining action of this mineralocorticoid and developed pulmonary oedema; the others 'escaped' normally. The pathophysiological disturbance in this condition is related to increased loss of fluid from the vascular compartment but the precise aetiological mechanism remains unknown.

Adult↗

Postural fluid retention in patients with idiopathic oedema: lack of relationship to the phase of the menstrual cycle.

1. Water and electrolyte excretion was measured in the follicular and luteal phases of the menstrual cycle in seven patients with idiopathic oedema and in four post-menopausal patients with this condition. 2. In contrast to previous findings in healthy women, the reduction in urinary flow and sodium excretion on being tilted to the upright position was not significantly different in the follicular and luteal phases in pre-menopausal patients and there were no significant differences between pre- and post-menopausal patients. 3. The percentage increase in packed cell volume on standing was significantly greater in patients with idiopathic oedema than in normal subjects in the luteal phase of the menstrual cylcle. 4. It is postulated that the enhanced retention of electrolytes and water in response to tilting in patients with idiopathic oedema is a compensatory mechanism for the decreased effective blood volume at that time.

Adult↗

Changes in cortisol metabolism following rifampicin therapy.

A patient with Addison's disease required increased corticosteroid dosage whilst receiving rifampicin. The pharmacological half-life of cortisol was reduced, but returned to normal when rifampicin was stopped. Cortisolproduction rates in four patients with pulmonary tuberculosis rose during treatment with rifampicin, as did urinary D-glucaric-acid excretion, an index of liver microsomal-enzyme activity. The alteration of the corticosteroid requirement in the patient with Addison's disease and the elevation of the cortisol-production rates were attributed to increased cortisol catabolism following hepatic macrosomal-enzyme induction by rifampicin.

Addison Disease↗