Drugs in Traumatic Emergencies

Resuscitation Fluids & Blood - Volume Virtuosos

• Access & Initial Fluids:
  • Secure 2 large-bore IVs (14-16G).
  • Crystalloids (NS, RL) first: Adults 1-2L or 20 ml/kg bolus; Pediatrics 20 ml/kg (max 3 before blood).
• Blood Products:
  • Indications: Persistent shock, active bleed, Hb < 7 g/dL.
  • Massive Transfusion Protocol (MTP): PRBC:FFP:Platelets ratio 1:1:1.
  • 📌 Oh No! O Neg is universal PRBC donor.
• Resuscitation Targets:
  • Urine Output: >0.5 ml/kg/hr (adults).
  • MAP >65 mmHg (adjust for TBI).

⭐ > Permissive hypotension (target SBP 80-90 mmHg) is advocated in penetrating trauma without TBI until definitive hemorrhage control.

Analgesia & Sedation - Comfort Commanders

• Goal: Control pain & anxiety, facilitate procedures, prevent agitation-related injury.
• Opioids:
  • Fentanyl: 1-2 mcg/kg IV. Rapid onset, short duration. Good for head injury (minimal ICP ↑).
  • Morphine: 0.1 mg/kg IV. Longer acting. Caution: histamine release, hypotension.
• Dissociative Anesthetic:
  • Ketamine:
    • Analgesic dose: 0.1-0.5 mg/kg IV.
    • Sedation/Dissociative dose: 1-2 mg/kg IV.
    • Key features: Maintains airway reflexes, sympathomimetic (↑BP, ↑HR).
    • ⚠️ Emergence reactions (mitigate with BZD).
• Benzodiazepines (Sedation/Anxiolysis):
  • Midazolam: 0.02-0.1 mg/kg IV. Risk: respiratory depression, hypotension. (Use cautiously).

⭐ Ketamine is an ideal analgesic/sedative in hemodynamically unstable trauma patients due to its sympathomimetic properties and preservation of airway reflexes at sub-dissociative doses.

Hemorrhage Control & Hemodynamics - Bleeding Blockers & Pressure Props

Goal: Stop bleeding, restore/maintain tissue perfusion.

• Antifibrinolytics (Bleeding Blockers):

  • Tranexamic Acid (TXA):
    • Mechanism: Inhibits plasminogen activation.
    • Dose: 1g IV over 10 min, then 1g IV over 8 hrs.
    • Administer within 3 hours of injury.
    • 📌 Mnemonic: Three hours for TXA.

  ⭐ Tranexamic acid (TXA) significantly reduces mortality due to bleeding in trauma patients if administered within 3 hours of injury (CRASH-2 trial finding).

• Vasopressors (Pressure Props): Use if hypotensive despite adequate fluids (target MAP > 65 mmHg).

  • Norepinephrine: First-line. Dose: 0.01-0.3 mcg/kg/min. Effect: ↑SVR, ↑MAP.
  • Vasopressin: Adjunct in refractory shock. Dose: 0.03 units/min (fixed dose) or 0.01-0.04 units/min.
  • Epinephrine: Consider if norepinephrine ineffective or significant cardiac dysfunction. Dose: 0.01-0.1 mcg/kg/min.

Adjunctive Medications - Trauma's Essential Allies

• Tetanus Prophylaxis: Crucial for all trauma.
  • Tetanus Toxoid (TT): 0.5ml IM.
  • Human Tetanus Immunoglobulin (hTIG): 250-500 IU IM (if incompletely immunized or contaminated wound).
• Antibiotics (Open Fractures): Administer ASAP.
  • Cefazolin 1-2g IV (Gustilo I/II).
  • Add Gentamicin 3-5mg/kg/day (Gustilo III).

  ⭐ Early administration of broad-spectrum antibiotics (e.g., a first-gen cephalosporin +/- aminoglycoside for severe contamination) is crucial in open fractures to prevent osteomyelitis.

• Analgesia: Titrate to pain relief.
  • Opioids: Morphine 0.1mg/kg, Fentanyl.
  • NSAIDs: Ketorolac (use cautiously; risk of bleeding/renal injury).
• Anticoagulant Reversal (Life-threatening bleed):
  • Warfarin: Vitamin K, Prothrombin Complex Concentrate (PCC).
  • Heparin: Protamine Sulfate (1mg per 100U heparin).
• Stress Ulcer Prophylaxis (High-risk ICU patients):
  • Proton Pump Inhibitors (PPIs) (e.g., Pantoprazole).

High‑Yield Points - ⚡ Biggest Takeaways

• Tranexamic acid (TXA) within 3 hours significantly reduces mortality in hemorrhagic trauma.
• Prioritize crystalloids for initial fluid resuscitation; consider permissive hypotension (SBP 80-90 mmHg) in active bleeding without TBI.
• Use vasopressors like Norepinephrine for persistent hypotension despite adequate fluid volume.
• Opioids (Fentanyl, Morphine) for pain; Ketamine offers analgesia with hemodynamic stability.
• Administer tetanus prophylaxis (toxoid ± TIG) for all open traumatic wounds.
• Early prophylactic antibiotics are crucial for open fractures and severe contamination_._