What is the initial fluid resuscitation calculation for a 65 kg patient with 1st and 2nd degree burns covering 27% of their Total Body Surface Area (TBSA)?

Fluid Resuscitation Calculation for 27% TBSA Burns

For a 65 kg patient with 1st and 2nd degree burns covering 27% TBSA, administer an immediate 20 mL/kg bolus (1,300 mL) within the first hour, then calculate 24-hour fluid requirements using the Parkland Formula: 3,510-7,020 mL total over 24 hours, with half (1,755-3,510 mL) given in the first 8 hours and the remainder over the next 16 hours. 1

Immediate Initial Bolus

• Give 20 mL/kg of Ringer's Lactate or Hartmann's solution intravenously within the first hour of management, regardless of precise burn assessment 1, 2
• For this 65 kg patient: 20 mL/kg × 65 kg = 1,300 mL in the first hour 1
• Do not delay this bolus while calculating precise TBSA—start immediately 1

24-Hour Fluid Calculation Using Parkland Formula

The Parkland Formula for adults with burns ≥10% TBSA is: 2-4 mL/kg/% TBSA over 24 hours 1

Calculation for this patient:

• Lower range (2 mL/kg/% TBSA): 2 × 65 kg × 27% = 3,510 mL over 24 hours 1
• Upper range (4 mL/kg/% TBSA): 4 × 65 kg × 27% = 7,020 mL over 24 hours 1
• Most commonly used (3 mL/kg/% TBSA): 3 × 65 kg × 27% = 5,265 mL over 24 hours 1

Timing of Fluid Administration

First 8 hours (from time of burn, not arrival):

• Administer half of the calculated 24-hour volume 1, 2
• Using 3 mL/kg/% TBSA: 2,632.5 mL in first 8 hours (approximately 329 mL/hour) 1
• Subtract the initial 1,300 mL bolus already given from this amount 1

Next 16 hours:

• Administer the remaining half of the 24-hour volume 1, 2
• Using 3 mL/kg/% TBSA: 2,632.5 mL over 16 hours (approximately 165 mL/hour) 1

Critical Monitoring and Adjustment

Target urine output as primary endpoint:

• Maintain urine output at 0.5-1 mL/kg/hour (32.5-65 mL/hour for this patient) 1, 2
• Urine output is the easiest and fastest parameter to monitor and should guide ongoing fluid rate adjustments 1

Adjust fluid rates based on clinical response, not rigid formula adherence:

• If urine output falls below 0.5 mL/kg/hour, increase fluid rate by 25-33% 1
• If urine output exceeds 1 mL/kg/hour, decrease fluid rate to avoid over-resuscitation 1

Important Caveats and Pitfalls

Avoid over-resuscitation ("fluid creep"):

• Studies show 76% of resuscitations exceed the upper Parkland limit, averaging 6.3 mL/kg/% TBSA, leading to significant morbidity 1, 3
• Complications include compartment syndrome, pulmonary edema, intestinal edema, and acute kidney injury 1, 3
• Once adequate urine output is achieved, do not continue excessive fluid rates 1

Use Ringer's Lactate or Hartmann's solution exclusively:

• These balanced crystalloid solutions have electrolyte concentrations closer to plasma 1, 2
• Avoid 0.9% NaCl due to risk of hyperchloremic acidosis 2

Consider albumin supplementation if fluid requirements escalate:

• If fluid rates exceed expected targets at 8-12 hours post-burn, consider albumin 5% supplementation with target serum albumin >30 g/L 1
• Never use hydroxyethyl starches (HES)—they are contraindicated in burn patients 1

Note on 1st degree burns:

• First-degree burns (superficial, involving only epidermis) are not included in TBSA calculations for fluid resuscitation 1
• Only 2nd degree (partial-thickness) and deeper burns count toward the 27% TBSA used in this calculation 1
• Verify that the 27% TBSA represents only 2nd degree or deeper burns; if 1st degree burns are included, recalculate using only 2nd degree areas 1