title: Preoperative shock secondary to severe hypokalemia and hypocalcemia from recreational enemas.
mesh_terms: D004733:Enema / Q000009:adverse effects*; D006801:Humans; D006996:Hypocalcemia / Q000150:complications* / Q000209:etiology; D007008:Hypokalemia / Q000150:complications* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D011229:Preanesthetic Medication / Q000009:adverse effects; D012769:Shock / Q000209:etiology*