What are the management strategies for anaphylactic shock?
Aug 06, 2021
Source: Cainiu Health
Dr. Sun Yinghua
Introduction
Since the vast majority of anaphylactic shock cases are drug-induced, all patients experiencing drug-induced anaphylactic shock must immediately discontinue the offending medication. Blood pressure, pulse, and respiration should be closely monitored, and prompt administration of anti-allergic medications—including vasoconstrictors and desensitizing agents—is essential. Epinephrine is commonly used and should be administered immediately upon onset of anaphylactic shock. Additionally, glucocorticoids may be employed.
Anaphylactic shock is an extremely severe allergic reaction; without prompt resuscitation, death may occur within as little as ten minutes.Since the vast majority of anaphylactic shock cases are drug-induced, all patients experiencing drug-induced anaphylactic shock must immediately discontinue the offending medication and undergo continuous monitoring of blood pressure, pulse, and respiration. Management involves timely administration of anti-allergic agents, vasopressors, and desensitizing agents. Epinephrine—a first-line treatment—is administered immediately upon diagnosis of anaphylactic shock. Glucocorticoids—such as dexamethasone or methylprednisolone—may also be given intravenously. Vasopressors typically include dopamine; if dopamine proves ineffective, norepinephrine may be substituted. Desensitizing agents include promethazine, cyproheptadine, and calcium salts, among others. Oxygen therapy is highly effective in correcting hypoxemia and alleviating respiratory failure. In cases of laryngeal edema or significant respiratory distress, prompt endotracheal intubation or tracheostomy is essential.
Another critical management strategy is timely fluid resuscitation. During shock, peripheral vasodilation and relative hypovolemia compromise tissue perfusion; therefore, rapid intravenous fluid administration helps restore systemic and local circulation and facilitates elimination of the allergen. Typically, 1000 mL of glucose-saline solution is infused intravenously. However, if pulmonary edema develops, the infusion rate should be reduced. In summary, once anaphylactic shock is recognized, immediate and aggressive intervention is essential to promptly reverse the shock state.
