Immediate Management of Rhabdomyolysis
Begin aggressive intravenous fluid resuscitation with 0.9% normal saline at 1 liter per hour immediately upon patient contact, as this is the single most effective intervention to prevent acute kidney injury and reduce mortality. 1, 2, 3
Initial Resuscitation and Fluid Management
Establish IV access immediately and infuse isotonic 0.9% normal saline at 1000 mL/hour as soon as rhabdomyolysis is suspected. 1, 2
Reduce the infusion rate by at least 50% (to ≥500 mL/hour) if the initial resuscitation period extends beyond 2 hours to prevent volume overload. 2
Target urine output of 300 mL/hour once bladder catheterization is established; insert a urinary catheter early to enable hourly urine output measurement unless urethral injury is suspected. 1, 2
Use only isotonic 0.9% saline as your crystalloid of choice—never use potassium-containing solutions (Lactated Ringer's, Hartmann's, Plasmalyte) because serum potassium rises markedly after reperfusion and can cause life-threatening hyperkalemia. 2
Avoid starch-based colloids due to their association with higher rates of acute kidney injury and bleeding complications. 2
Continue intravenous fluids until CK levels decrease below 1000 U/L, urine output remains adequate, electrolytes normalize, and renal function stabilizes or improves. 1, 4
Evidence Note on Fluid Resuscitation
The Eastern Association for the Surgery of Trauma meta-analysis demonstrated that aggressive IVFR decreased both the incidence of acute renal failure and need for dialysis, making it the only intervention with proven benefit. 3 In contrast, neither bicarbonate nor mannitol administration improved outcomes, and these should be conditionally avoided. 3
Electrolyte Monitoring and Management
Monitor electrolytes every 6-12 hours, including potassium, calcium, and phosphorus, as hyperkalemia is the most immediate life-threatening complication of rhabdomyolysis. 1, 2
Treat hyperkalemia aggressively with standard emergency protocols: calcium gluconate for cardiac membrane stabilization, insulin plus dextrose, and β-agonists for intracellular potassium shift. 2
Obtain an ECG immediately to identify life-threatening cardiac manifestations of hyperkalemia. 5
Medication Review
- Discontinue any medications or supplements that may worsen rhabdomyolysis, including statins, creatine monohydrate, and red yeast rice. 1
Compartment Syndrome Recognition and Management
Suspect compartment syndrome using the "6 Ps": pain, paresthesia, paresis, pain with passive stretch, pink skin color, and late findings of pulselessness/pallor (which indicate arterial occlusion and poor outcomes). 6, 2
Initial management includes removing tight dressings and splitting casts—critically, avoid limb elevation as this reduces perfusion pressure and worsens compartment ischemia. 6, 7, 2
Perform early fasciotomy when compartment pressure exceeds 30 mmHg or when differential pressure (diastolic BP minus compartment pressure) is <30 mmHg. 1
In hypotensive patients, fasciotomy is indicated when intracompartment pressures reach ≥20 mmHg; in normotensive patients with positive clinical findings, fasciotomy is indicated at ≥30 mmHg if the duration of increased pressure is unknown or exceeds 8 hours. 6
Critical Pitfall
Failure to recognize compartment syndrome promptly results in limb loss and worsens rhabdomyolysis by causing additional muscle breakdown. 2 The benefits of fasciotomy decrease considerably the later it is performed, while complications including bleeding and infection increase. 6
Renal Replacement Therapy Indications
Initiate dialysis early for any of the following absolute indications: 1, 2
- Refractory hyperkalemia unresponsive to medical management
- Severe metabolic acidosis
- Volume overload unresponsive to conservative therapy
- Uremic symptoms (encephalopathy, pericarditis)
- Persistently elevated CK levels after 4 days of adequate hydration
Dialysis Modality Selection
Intermittent hemodialysis is the preferred modality because it provides rapid potassium clearance, can treat multiple patients per machine, and offers options for minimal anticoagulation in bleeding-prone trauma patients. 6, 2
Deliver each intermittent session with a Kt/V ≥1.2, performed three times per week. 2
For hemodynamically unstable patients, use continuous renal replacement therapy at an effluent dose of 20-25 mL/kg/hour, though this requires 24/7 nursing support which may not be available in disaster settings. 6, 2
Peritoneal dialysis may be preferable in small children and is an option if other modalities are unavailable; rapid exchanges with high-glucose solutions maximize ultrafiltration and potassium removal. 6
Special Considerations for Crush Syndrome
If rhabdomyolysis results from crush injury or prolonged entrapment:
Begin fluid resuscitation while the victim is still trapped, not after extrication—this is the fundamental difference in crush syndrome management. 7
Administer 3-6 liters of 0.9% normal saline in the first 24 hours with target urine output of 200-300 mL/hour until myoglobinuria clears. 7
Never triage crush victims away from active treatment due to lack of dialysis availability, as intensive fluid management can restore renal function and avoid dialysis need entirely. 7