ANAPHYLACTIC SHOCK(ANAPHYLAXIS) EMERGENCY MANAGEMENT PROTOCOL,ANAPHYLAXIS REACTION TREATMENT NURSING

Anaphylactic Shock: Understanding and Management

What is Anaphylactic Shock?

• Anaphylactic shock is defined as an acute systemic IgE-mediated type 1 hypersensitivity reaction that occurs within minutes to seconds after exposure to an allergen.

• This reaction indicates that the patient has a specific allergy, leading to rapid development of symptoms following exposure.

Causes and Triggers

• Common triggers for anaphylactic reactions include drugs (e.g., penicillin), contrast media used in radiology, latex, insect stings (e.g., bee stings), and certain foods like fish, peanuts, and strawberries.

• The body's allergic response involves mast cells releasing histamine, which precipitates various symptoms.

Symptoms of Anaphylactic Shock

• Histamine release causes vasodilation leading to hypotension (low blood pressure), reflex tachycardia (increased heart rate), laryngeal edema, bronchoconstriction, cyanosis due to CO2 retention, itching, urticaria (hives), sweating, diarrhea or vomiting.

• The most critical concern during anaphylaxis is airway protection due to potential laryngeal obstruction.

Management Strategies

Initial Treatment Steps

• Always approach treatment using the ABC method: Airway management is paramount; secure the airway as patients may require intubation due to laryngeal edema.

• Administer 100% oxygen if respiratory depression is imminent. Remove any identified allergens from the patient's environment.

Medication Administration

• Administer intramuscular adrenaline (epinephrine) at a dose of 0.5 mg every five minutes if necessary; it causes vasoconstriction and bronchodilation.

• Antihistamines such as chlorpheniramine (10 mg IV) can be given to counteract histamine effects. Hydrocortisone (200 mg IV) may also be administered as a steroid treatment.

Fluid Resuscitation and Monitoring

• Provide intravenous fluids (0.9% saline solution) to support blood pressure in cases of hypotension.

• If hypotension persists despite initial treatments, consider ICU admission for further monitoring and possible IV infusion of adrenaline.

Advanced Treatment Options

ICU Care Considerations

• In ICU settings, additional medications like aminophylline can be used for bronchodilation alongside nebulized salbutamol.

• Continuous ECG monitoring is essential to prevent cardiac complications during treatment.

Post-Anaphylaxis Assessment

Anaphylactic Shock Management

Initial Treatment Steps

• Administer serum triptase levels within 1 to 6 hours post-reaction.

• Provide chlorpheniramine (4 mg) orally every 6 hours if the patient experiences itching.

• Educate the patient on avoiding specific allergens that triggered their anaphylactic shock before discharge.

Self-Management Education

• Instruct patients on using a self-injectable epinephrine device (EpiPen), which contains 0.3 mg of epinephrine, for immediate use upon exposure to allergens.

• Recommend conducting a skin prick test prior to discharge to identify unknown allergens responsible for the reaction.

Considerations for Patients on Beta Blockers

• Highlight that adrenaline may not be effective in patients already taking beta blockers, as these medications block receptors where adrenaline acts.

• Suggest administering IV salbutamol instead of adrenaline in such cases, as it promotes bronchodilation and helps prevent respiratory arrest.

Summary of Anaphylactic Reaction

• Discussed the release of histamine as a cause of anaphylaxis and its clinical presentation, emphasizing laryngeal obstruction as a critical symptom.