A 35% flame burn at a district hospital without a burn unit
At 08:00 a 34-year-old man weighing 70 kg is rescued from a house fire with flame burns to his face, both arms, anterior trunk and both thighs, estimated at 35% of total body surface area, mostly partial thickness. He has singed nasal hair and a hoarse voice. The nearest burn unit is 90 km away and your district hospital has no ICU bed free. At 10:30, two and a half hours after the burn, an IV line is secured and Ringer lactate is started at 100 mL/h. At 13:30 the nurse reports that only 60 mL of urine has drained since the catheter was inserted at 11:00; pulse is 118/min, BP 96/62 mmHg, and the patient is increasingly restless. He has received one dose of oral paracetamol as his only analgesia and has had nothing by mouth. There is no arterial blood gas machine on site.
1. Calculate this patient's fluid requirement, assess whether the current rate is adequate, and state what rate you would set for the next two hours.
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Using the Parkland estimate, 4 mL x 70 kg x 35% = 9,800 mL in 24 hours, with half (4,900 mL) in the first 8 hours counted from the time of the burn, i.e. by 16:00, not from the time fluids started. The commonest error here is to start the 8-hour clock at 10:30, which under-resuscitates the patient by two and a half hours' worth of volume.
By 13:30 he has received roughly 300 mL against a target of about 4,300 mL. Urine output is about 24 mL/h, well below the 0.5-1 mL/kg/h target of 35-70 mL/h, and he is tachycardic, hypotensive and restless - all consistent with under-resuscitation rather than overload.
For the next two hours I would deliver the remaining volume needed by 16:00, which works out to well over 1,000 mL/h, but as a titrated catch-up rather than a blind bolus: reassess pulse, BP, respiratory rate, sensorium and urine output every 15 minutes, and slow down if there are basal crepitations, a rising respiratory rate or a falling urine output paradoxically. The formula is a starting point; the patient's response is the prescription. I would also note that delays, inhalation injury and large burns in the very young or elderly all change needs, so any calculation must be re-derived hourly.
2. Which bedside observations would you record hourly, and how does each one change what you do?
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Hourly urine output through a catheter is the single best titration end-point: 0.5-1 mL/kg/h (35-70 mL/h here) suggests adequate organ perfusion; persistently lower output with a rising pulse means the rate must increase; suddenly high output may mean over-resuscitation or resolving hypoperfusion. Heart rate and blood pressure together distinguish ongoing losses from adequate filling, and a narrowing pulse pressure with cool peripheries is an early warning. Respiratory rate and oxygen saturation matter disproportionately in this patient because facial burns and a hoarse voice suggest inhalation injury: a rising rate or falling saturation may be early airway oedema or fluid overload, and both demand a different response. Sensorium tracks cerebral perfusion and CO2 retention. Capillary refill and core temperature round this out, since burn patients become hypothermic quickly and hypothermia worsens coagulopathy and outcome.
Two features here specifically alter fluid needs. First, the delayed start means a real deficit already exists, so the formula alone will lag behind the patient. Second, the possible inhalation injury raises requirements but simultaneously narrows the margin for pulmonary oedema, which is precisely why the catch-up must be monitored minute by minute rather than given as a single large bolus.
3. Should this patient be transferred, and what must be done before and during transfer?
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Yes - he meets usual burn-unit referral criteria on several counts: burn size around 35% in an adult, involvement of the face, and clinical signs suggesting inhalation injury. A district hospital without a free ICU bed cannot provide the airway and fluid management this needs. However, transfer should not be immediate and unplanned; the judgement is about sequencing.
The airway comes first. Hoarseness, singed nasal hair and restlessness in a patient with facial burns means progressive oedema is likely, and a 90 km road journey is exactly when that airway will close. If there is stridor, drooling, worsening hoarseness or a rising respiratory rate, arrange early intubation by the most experienced person available before departure, not in the ambulance. Secure two large-bore IV lines, run the calculated fluid, catheterise with hourly urometer, keep him warm, give titrated IV opioid analgesia rather than oral paracetamol (which is inadequate and poorly absorbed in shock), insert a nasogastric tube for ileus and start nothing by mouth.
Document the exact time of burn, fluids given and urine output; send copies. Alert the receiving burn unit by phone with the history, estimated area, weight and airway status. Travel with oxygen, monitoring and a staff member able to manage a deteriorating airway.