Burns: Rule of Nines and Fluid Resuscitation

Medical-Surgical · Integumentary / Wounds & Skin·Updated 2026-10-28

What it is

A major burn triggers widespread capillary leak, so plasma shifts into the tissues during the emergent phase (up to 72 hours after the burn) and the client develops burn shock. Fluid resuscitation replaces this loss; its volume depends on body weight and the percentage of total body surface area (TBSA) with partial- and full-thickness burns. Inhalation injury, circumferential burns and early hyperkalemia are the immediate threats; infection, hypermetabolism and contractures dominate later phases.

What the NCLEX focuses on

Inhalation injury cues: facial burns, singed nasal hair, soot in the mouth or sputum, hoarseness, stridor, and a fire in an enclosed space; early intubation prevents airway closure from edema.
Carbon monoxide poisoning: SpO2 reads falsely normal; give 100% oxygen by non-rebreather mask and check the carboxyhemoglobin level.
Adult rule of nines: head and neck 9%, each arm 9%, anterior trunk 18%, posterior trunk 18%, each leg 18%, perineum 1%; count partial- and full-thickness burns only.
Depth: superficial is red, dry and painful without blisters; partial-thickness is blistered, moist and very painful; full-thickness is white, leathery or charred and painless at the center.
Parkland formula: 4 mL x kg x %TBSA of lactated Ringer's over 24 hours; half in the first 8 hours from the time of injury, the rest over the next 16 hours.
Emergent-phase labs: hyperkalemia from damaged cells, hyponatremia, and a high hematocrit from hemoconcentration.
Circumferential full-thickness burns of a limb or chest restrict circulation or breathing and need escharotomy.

Priority nursing actions

Stop the burning process, then assess airway and breathing; give 100% humidified oxygen and prepare for intubation with inhalation injury.
Insert two large-bore IV catheters and start lactated Ringer's per the Parkland formula.
Insert an indwelling urinary catheter and titrate fluids to hourly urine output.
Give IV opioids for pain, update tetanus prophylaxis, and keep the client warm.
Check distal pulses, sensation and color beyond circumferential burns and report changes for escharotomy.

Numbers to know

Value	Target or rule	Why it matters
Parkland formula	4 mL x kg x %TBSA of lactated Ringer's in 24 hours	Replaces fluid lost to capillary leak
Worked example: 70 kg, 40% TBSA	11,200 mL in 24 hours; 5,600 mL in the first 8 hours	Half runs in the first 8 hours
Clock start	Time of injury, not time of arrival	Late arrival means a faster first-half rate
Adult urine output	0.5 mL/kg/hour (about 30 to 50 mL/hour)	Best guide to adequate resuscitation
Electrical burn urine output	75 to 100 mL/hour until urine clears	Flushes myoglobin to protect the kidneys
Potassium, emergent phase	Above 5.0 mEq/L (5.0 mmol/L)	Released from damaged cells; dysrhythmia risk

Common exam traps

Choosing to complete the TBSA estimate or dress facial burns before assessing the airway: wrong because airway edema progresses quickly even while the client is talking.
Choosing to start the 8-hour clock at hospital arrival: wrong because it starts at the time of the burn.
Choosing to include superficial burns in the TBSA: wrong because they do not cause the fluid shift that resuscitation replaces.
Choosing IM or subcutaneous pain medicine: wrong because poor tissue perfusion makes absorption unreliable; give opioids IV.
Choosing to elevate a pale, numb hand and reassess in hours after a circumferential burn: wrong because circulation is compromised; notify the provider at once.

What to teach

For a minor burn at home, cool it under cool running water, not ice, butter or ointment, and cover it with a clean dry cloth.
Wear prescribed pressure garments about 23 hours a day and keep up range-of-motion exercises to prevent contractures.
Eat a high-calorie, high-protein diet to meet the hypermetabolic demand of healing.
Prevent burns: working smoke alarms and a water heater set at or below 120 F (49 C).

Try 2 NCLEX-style questions on this topic

From the NCLEXPace question bank. Pick your answers, then check them inside NCLEXPace.

Question 1 · QID 294B230B

A client sustained a major burn injury at 0800 but did not arrive at the emergency department until 1000. When calculating the timing for the first half of the Parkland formula fluid volume, from what time should the nurse count the first 8 hours?

Select the best answer.

A. The time the resuscitation calculation is completed after the burn size has been confirmed
B. The time the first resuscitation fluid is started after vascular access and the burn assessment are completed
C. 1000, when the client arrived in the emergency department and formal burn resuscitation began
D. 0800, the time of the actual burn injury

Question 2 · QID 373A4396

A client has a circumferential full-thickness burn of the forearm. Several hours later, the nurse notes the affected hand is pale, cool, and the client reports increasing numbness. For each possible action, indicate whether it is appropriate or inappropriate.

	Appropriate	Inappropriate
Elevate the arm and reassess in several hours
Notify the provider immediately of possible compromised circulation
Apply a warm compress to improve circulation to the hand
Document the finding as an expected part of the healing burn

See the answers and full rationales

The correct answers, the reasoning for every option and 3,200+ more NCLEX questions are inside NCLEXPace. Create your account, then choose a plan to open them.

Create Account →

More tips on Medical-Surgical

Acute PancreatitisRecognize acute pancreatitis by pain and lipase, give fluids and pain control first, and catch hypocalcemia, shock and respiratory failure.Bowel Obstruction and NG Tube CareTell small from large bowel obstruction, spot strangulation early, and keep a decompression NG tube placed, patent and safe.Acute Kidney Injury vs Chronic Kidney DiseaseClassify AKI as prerenal, intrarenal or postrenal, follow its phases, and compare it with the staged, irreversible course of CKD.

Sources

Harding MM, Kwong J, Hagler D, Reinisch C. Lewis's Medical-Surgical Nursing: Assessment and Management of Clinical Problems. 12th ed. Elsevier; 2023; Chapter: Burns.
American Burn Association. Advanced Burn Life Support Course Provider Manual. 2018 update. American Burn Association; 2018.

Practice the NCLEX questions on this topic

3,200+ NCLEX questions with think-like-a-nurse rationales, unfolding case studies and adaptive readiness exams. Start with free practice questions, then choose a plan when you are ready.