Discrepancy between short synacthen test (sst) and insulin stimulation test (ist)

2021 ◽  
Author(s):  
Kagabo Hirwa ◽  
Nishchil Patel ◽  
Abraham Biaye ◽  
Daniel Flanagan
Keyword(s):  
Stimulation Test ◽  
Insulin Stimulation ◽  
Synacthen Test ◽  
Short Synacthen Test

scholarly journals Long acting porcine sequence ACTH in the diagnosis of adrenal insufficiency

2019 ◽  
Vol 181 (6) ◽  
pp. 639-645 ◽  
Author(s):  
Abilash Nair ◽  
Chellamma Jayakumari ◽  
Geena Susan George ◽  
Puthiyaveettil Khadar Jabbar ◽  
Darvin V Das ◽  
...  
Keyword(s):  
Adrenal Insufficiency ◽  
Area Under The Curve ◽  
Serum Cortisol ◽  
High Accuracy ◽  
Stimulation Test ◽  
Acth Stimulation Test ◽  
Acth Stimulation ◽  
Synacthen Test ◽  
Long Acting ◽  
Short Synacthen Test

Objectives Injectable tetracosactide hexa-acetate, ACTH 1-24 (Synacthen), is not marketed in many countries including India, whereas Injectable long acting porcine sequence, ACTH 1-39 (Acton Prolongatum®) is easily available and much cheaper. This study aimed to find the diagnostic accuracy of ACTH stimulation test using i.m. Acton Prolongatum® (acton prolongatum stimulation test, APST) in comparison with Synacthen (short synacthen test, SST) for the diagnosis of glucocorticoid insufficiency. Methods Subjects with a suspicion of adrenal insufficiency based on clinical features underwent a SST with 250 µg Synacthen followed by APST using 30 units of Acton Prolongatum®. Serum cortisol levels were measured at 60 and 120 min following injection of Acton Prolongatum®. Stimulated peak cortisol of less than 18 µg/dL on SST was considered as adrenal insufficiency. Results Forty seven patients with mean age of 36.7 ± 14.4 years were enrolled for the study. Based on SST, twenty (n = 20) persons were classified as having adrenal insufficiency, whereas twenty-seven (n = 27) were found to be normal. Area under the curve of APST (at 120 min) was 0.986 when compared to SST, thus proving its high accuracy. A serum cortisol cut off value of 19.5 µg/dL at 120-min following stimulation with Acton Prolongatum® showed a sensitivity of 100% and specificity of 88%. Conclusion ACTH stimulation test using Acton Prolongatum® is an economical and accurate alternative to the short Synacthen test.

scholarly journals What is the value of the 60‐minute cortisol measurement in the short synacthen test (SST)? Evidence for the defence

2021 ◽  
Vol 75 (8) ◽  
Author(s):  
Maria Michaelidou ◽  
Ghasem Yadegarfar ◽  
Lauren Morris ◽  
Samantha Dolan ◽  
Adam Robinson ◽  
...  
Keyword(s):  
Synacthen Test ◽  
Short Synacthen Test

Response to ‘Determining the utility of the 60-min cortisol measurement in the short Synacthen test’

2013 ◽  
Vol 80 (5) ◽  
pp. 766-767
Author(s):  
Carol Evans ◽  
Nadia El-Farhan ◽  
David Ducroq ◽  
Aled Rees
Keyword(s):  
Synacthen Test ◽  
Short Synacthen Test

Do we need 30 min cortisol measurement in the short synacthen test: a retrospective study

2019 ◽  
Vol 96 (1138) ◽  
pp. 467-472
Author(s):  
Rajeev Kumar ◽  
Peter Carr ◽  
Kimberley Moore ◽  
Zeeshan Rajput ◽  
Louise Ward ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Adrenal Insufficiency ◽  
Late Response ◽  
Inadequate Response ◽  
Insufficient Response ◽  
Group A ◽  
Synacthen Test ◽  
Cortisol Levels ◽  
Group B ◽  
Short Synacthen Test

ObjectiveThe short synacthen test (SST) is widely used across the UK to assess adrenal reserve but there remains no consensus on the timing of cortisol sampling to help diagnose adrenal insufficiency. The main objective of our study was to see if both 30 and 60 min sample are required following administration of synacthen to investigate suspected adrenal insufficiency (AI).DesignThis was a single-centre retrospective study of 393 SSTs measuring 0, 30 and 60 min cortisol levels after administration of 250 µg of synacthen.Patients and methodsAll the SSTs for patients suspected of primary or secondary AI between April 2016 and October 2018 were included in this study. The tests were performed as per our hospital protocol. A post-adrenocorticotropic hormone (ACTH) cortisol response of 420 nmol/L at any time point was considered adequate to rule out AI. The data were analysed to ascertain the proportion of patients who achieved this level at 30 and/or 60 min.ResultsA total of 393 SST results were included in this study. Patients were divided into two groups depending on whether (group A) or not (group B) they were on steroids. Overall, a total of 313 (79.6%) subjects achieved cortisol level of ≥420 nmol/L at 30 and 60 min while 19 (4.8%) had late response (ie, insufficient 30 min cortisol levels, rising to ≥420 nmol/L at 60 min). Another 61 subjects (15.5%) showed insufficient response at both 30 and 60 min (ie, failed to achieved level of ≥420 nmol/L). Importantly, there was no patient in either group who had adequate response at 30 min and then failed at 60 min. Patients in group A were more likely to have inadequate response at both 30 and 60 min while patients in group B were more likely to have normal response at both time points.ConclusionsOur results suggest that about 5% of people undergoing SST may be inappropriately diagnosed as having AI (and subjected to long-term unnecessary steroid treatment) if the 60 min sample is not maintained. We suggest that 30 min sample does not add any additional diagnostic utility and can be omitted thus simplifying SST even further and saving on cost and resources. We propose that single measurement after 60 min of administration of synthetic ACTH is a sufficient screening test for AI.

The short Synacthen test: is less best?

1999 ◽  
Vol 51 (2) ◽  
pp. 151-152 ◽  
Author(s):  
Paul M. Stewart ◽  
Penny Clark
Keyword(s):  
Synacthen Test ◽  
Short Synacthen Test
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