Endocrine Abstracts

The synacthen test is a commonly performed endocrine test; we have looked at whether we overuse this test. Of 150 synacthen tests performed in one year 52 were randomly selected for audit. 19 were undertaken for symptoms alone (Group 1); 16 for a low random cortisol (below 261 nmom/l – Group 2); 17 for electrolyte disturbances (either low sodium, high potassium or both – Group 3). 3 in Group 2 and 1 in Group 1 were abnormal but in no patient with a random cortisol ab...

Thyroid hormone and TSH levels change during pregnancy yet most laboratories use reference ranges derived from subjects who are not pregnant and male. Does this lead to an underestimation of thyroid disorders in pregnancy?We have derived our own reference range for Free T4 and TSH levels in pregnancy. The hormones were measured in 82 euthyroid mothers at booking and 68 at 28 weeks of pregnancy. Mean (95%CI: reference range of +2SD) FT4 levels were...