Gladness Dakalo Nethathe

The recent demonstration of the significant reduction in mortality in patients with septic shock treated with adjunctive glucocorticoids combined with fludrocortisone and the effectiveness of angiotensin II in treating vasodilatory shock have renewed interest in the role of the mineralocorticoid axis in critical illness. Glucocorticoids have variable interactions at the mineralocorticoid receptor. Similarly, mineralocorticoid receptor-aldosterone interactions differ from mineralocorticoid receptor-glucocorticoid interactions and predicate receptor-ligand interactions that differ with respect to cellular effects. Hyperreninemic hypoaldosteronism or selective hypoaldosteronism, an impaired adrenal response to increasing renin levels, occurs in a subgroup of hemodynamically unstable critically ill patients. The suggestion is that there is a defect at the level of the adrenal zona glomerulosa associated with a high mortality rate that may represent an adaptive response aimed at increasing cortisol levels. Furthermore, cross-talk exists between angiotensin II and aldosterone, which needs to be considered when employing therapeutic strategies.

BACKGROUND: Financial cost is a recognised cause of lack of access to adequate healthcare in South Africa (SA). Data describing the SA healthcare professional (HCP)'s awareness of costs are scant. Their increased awareness of healthcare costs may improve efficacy and reduce wasteful expenditure. OBJECTIVE: To assess SA HCP's knowledge of healthcare costs, identify factors that influence cost awareness, and to determine if surveyed HCPs received training related to cost management during their studies or at any stage during their practice. METHODS: This cross-sectional survey was conducted by means of a standardised questionnaire. HCPs working at a major tertiary academic hospital were asked to answer an anonymous standardised questionnaire aimed at determining their awareness of the costs of commonly requested hospital items and tests. Cost accuracy was determined by assessing the log deviation of the estimated cost from true cost, with values >0 and <0 representing overestimates and underestimates, respectively. Cost estimations were considered correct if the absolute value of the log deviation was <0.2. Participants' attitudes towards the potential impact of the availability of cost information on their practice were assessed. RESULTS: The overall cost estimation of accuracy was low (mean 0.60; standard deviation 1.99) and differed widely between items. Cheaper items were more likely to be overestimated and expensive items to be underestimated. The majority of participants indicated that cost awareness education was not part of their training or practice (84.5%) and that they would like cost information to be made readily available (92.2%). Eighty-four percent of participants were of the opinion that cost information would not negatively affect patient care. CONCLUSION: The use of percentage deviation from true cost as a method of assessing cost awareness creates a bias towards overestimation, which is more relevant for cheap items, as larger overestimates are more common for these items. We propose the use of log deviation of the estimated cost from the true cost as a method of assessing cost estimation accuracy. HCPs have a limited understanding of the costs of disposables, tests and drugs commonly used in their practice and would prefer that cost information be made readily available to them. Attention should be paid to improving cost awareness among HCPs working at SA hospitals.

Background and Objective: Critical illness-related corticosteroid insufficiency (CIRCI) describes hypothalamic-pituitary-axis impairment during critical illness associated with three major pathophysiological events; dysregulation of the hypothalamic-pituitary-axis, altered cortisol metabolism, and tissue corticosteroid resistance. Similar changes are evident with regard to mineralocorticoid dysfunction in critical illness. Hyperreninemic hypoaldosteronism describes a sub-population of critically ill patients with an impaired adrenal aldosterone response to increased levels of renin. In the light of the recent demonstration of significant mortality improvements associated with adjunctive glucocorticoid treatment in combination with fludrocortisone in septic shock, and the suggestion that angiotensin II is effective in treating vasodilatory shock, the clinical relevance of mineralocorticoid dysfunction in critical illness requires further exploration. This interpretative review considers hyperreninemic hypoaldosteronism, a concept worth re-examining in the light of the potential mortality benefit of mineralocorticoid supplementation in critical illness. We compare the pathophysiological and clinical characteristics of CIRCI and hyperreninemic hypoaldosteronism, two syndromes that represent corticosteroid and mineralocorticoid dysfunction in critical illness. We highlight gaps in the literature and give novel insights into the limitations of assessment, diagnosis and treatment. Methods: English language abstracts and articles published before June 2021 were identified through PubMed and Google Scholar. Randomized trials, observational studies, basic sciences studies, systematic and narrative reviews were considered. Reference lists of articles were searched for further relevant material. Key Content and Findings: Difficulties are encountered in interpreting measures of gluco- and mineralo-corticoid activity in critical illness. Aldosterone levels, like cortisol, have been shown to be increased in sepsis and hemorrhagic shock. The finding of hyperreninemia and hyperaldosteronism with an aldosterone/plasma renin activity ratio below 2 should prompt consideration of hyperreninemic hypoaldosteronism, a finding, which likely signifies the loss of negative feedback control of the renin-angiotensin-aldosterone system. Conclusions: As there is evidence to suggest that in acute critical illness, hyperreninemic hypoaldosteronism, is associated with poor outcomes, co-administration of hydrocortisone with fludrocortisone in patients with septic shock should be considered. In keeping with the concept of CIRCI, we suggest the term critical illness-related mineralocorticoid insufficiency as a more appropriate description of the impaired aldosterone response to increased levels of renin seen in this group of patients.