The formula that has been proposed by Adrogue and Madias predicted with relative accuracy the changes in serum sodium concentration in almost all patients. Thus, it should be considered as a very useful tool for the management of dysnatraemias. However, special attention should be paid when this equation is used in patients with hyponatraemia due to extracellular volume depletion after euvolaemia's restoration and primary polydipsia in order to avoid rapid correction of hyponatraemia.
The authors present a case report of extensive facial petechiae following esophagogastroduodenoscopy (EGD). The patient was a previously healthy male who did not receive any medication predisposing to haemorrhage, nor did he suffer from any underlying disorder (as the subsequent diagnostic work-up demonstrated) that predisposed to the extensive facial capillary rupture. Increased intrathoracic pressure during EGD can rarely result in similar cases that are alarming to the patient and possibly the endoscopy staff, and awareness of their potential and their benign nature and prognosis can assist in reassuring patients.
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