Model Answer
0 min readIntroduction
Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN) are rare, life-threatening severe cutaneous adverse reactions, most commonly triggered by medications. SJS is characterized by mucocutaneous involvement with less than 10% total body surface area (TBSA) detachment, while TEN involves greater than 30% TBSA detachment. Overlap SJS/TEN exists between 10-30% TBSA detachment. Prompt recognition and aggressive management are crucial to improve patient outcomes. This answer will detail the comprehensive management of SJS in an adult patient, encompassing initial assessment, stabilization, and ongoing care.
I. Initial Assessment and Diagnosis
The initial assessment is paramount. A thorough history should be taken, focusing on medication use (including over-the-counter drugs and herbal remedies) in the weeks preceding symptom onset. Physical examination should document the extent of epidermal detachment, mucosal involvement (oral, ocular, genital), and systemic symptoms.
- Diagnostic Criteria: Diagnosis is primarily clinical, based on the characteristic appearance of target lesions, widespread epidermal detachment, and mucosal involvement.
- Differential Diagnosis: Rule out other conditions like scalded skin syndrome, bullous pemphigoid, and viral exanthems.
- Scoring Systems: SCORTEN (Severity-of-Illness Score for Toxic Epidermal Necrolysis) can be used to assess prognosis and guide management.
II. Acute Phase Management (First 72 Hours)
The acute phase focuses on resuscitation and preventing secondary complications.
A. Resuscitation and Stabilization
- Fluid Resuscitation: Aggressive intravenous fluid resuscitation is critical to counteract fluid loss from the damaged skin. Guided by urine output and hemodynamic parameters.
- Electrolyte Management: Monitor and correct electrolyte imbalances (sodium, potassium, calcium, magnesium).
- Pain Management: Adequate analgesia is essential. Opioids may be required, but careful monitoring for respiratory depression is necessary.
- Wound Care: Similar to burn management. Sterile dressings (e.g., silver sulfadiazine, biosynthetic dressings) should be applied to prevent infection. Avoid adherent dressings.
- Temperature Regulation: Maintain normothermia.
B. Supportive Care
- Nutritional Support: Early enteral nutrition is preferred. If not possible, parenteral nutrition should be considered.
- Respiratory Support: Monitor for airway compromise due to mucosal swelling. Intubation and mechanical ventilation may be required.
- Ocular Care: Frequent lubrication with artificial tears and ophthalmological consultation are crucial to prevent corneal damage and blindness.
- Infection Control: Strict infection control measures are essential. Prophylactic antibiotics are generally *not* recommended, but monitor closely for secondary infections (pneumonia, sepsis, wound infections).
C. Specific Therapies
- Causative Agent Withdrawal: Immediately discontinue all suspected medications.
- Intravenous Immunoglobulin (IVIG): May be considered, particularly early in the course, but evidence is mixed. Dosage varies (typically 1-2 g/kg over several days).
- Corticosteroids: Controversial. Some studies suggest benefit with early use, but others show increased risk of infection. Use should be individualized.
- Cyclosporine: Emerging evidence suggests potential benefit, particularly in early stages.
III. Post-Acute Phase and Recovery
Once the epidermal detachment stabilizes, the focus shifts to wound healing, preventing complications, and rehabilitation.
- Continued Wound Care: Continue sterile dressings and monitor for infection.
- Skin Grafting: Consider skin grafting for large areas of denuded skin.
- Physical Therapy: Prevent contractures and maintain joint mobility.
- Psychological Support: SJS/TEN can be emotionally traumatic. Provide psychological support and counseling.
- Long-Term Follow-up: Monitor for long-term sequelae, such as skin pigmentary changes, scarring, and ocular complications.
IV. Monitoring and Complications
Close monitoring is essential to detect and manage potential complications.
- Sepsis: Early recognition and aggressive treatment are crucial.
- Acute Respiratory Distress Syndrome (ARDS): Requires mechanical ventilation and supportive care.
- Multiple Organ Dysfunction Syndrome (MODS): Manage supportively.
- Ocular Complications: Dry eye, corneal ulcers, and blindness.
- Scarring and Contractures: Require physical therapy and potentially surgical intervention.
Conclusion
Managing Stevens-Johnson Syndrome requires a multidisciplinary approach, encompassing prompt diagnosis, aggressive resuscitation, meticulous supportive care, and consideration of specific therapies. Early identification of the causative agent and its removal are paramount. Close monitoring for complications and long-term follow-up are essential to optimize patient outcomes. While mortality rates have decreased with improved care, SJS/TEN remains a serious and potentially life-threatening condition. Further research is needed to refine treatment strategies and improve prognosis.
Answer Length
This is a comprehensive model answer for learning purposes and may exceed the word limit. In the exam, always adhere to the prescribed word count.