An adult weighing 88 kg is brought to the emergency department after sustaining a thermal injury.

Burns are partial and full thickness over 38 According to the Parkland formula, what would this client's fluid requirements be for the first 24 hours after injury?

Neurological assessment using motor responses helps determine the level of brainstem involvement. This scenario requires applying knowledge of the Glasgow Coma Scale and motor pathways to distinguish between pathological posturing and more integrated, purposeful motor functions.

Choice A rationale

Purposeful movement indicates that the motor cortex or higher brain centers are successfully processing stimuli. Moving away from pain represents a significant improvement from decorticate posturing, which involves damage to the corticospinal tract and midbrain.

Choice B rationale

Decerebrate posturing involves rigid extension of the arms and legs, signifying deeper brainstem injury or herniation. This change indicates neurological deterioration rather than improvement, as it suggests the lesion has progressed lower into the pons.

Choice C rationale

Pupils that are fixed and dilated at 6 mm indicate loss of autonomic function and severe cranial nerve III compression. This is a sign of increasing intracranial pressure and brainstem failure, representing a critical clinical decline.

Choice D rationale

Flaccid paralysis is often the most severe motor finding, indicating a loss of all muscle tone and spinal reflex arcs. In the context of traumatic brain injury, this usually signals profound neurological collapse rather than recovery..

This question requires knowledge of acid-base balance and pathophysiology of chronic kidney disease. Understanding how impaired renal function leads to metabolic acidosis through decreased hydrogen ion excretion and reduced bicarbonate regeneration is essential to identify the correct values.

Choice A rationale

A pH of 7.55 and HCO3 of 30 indicate metabolic alkalosis. Normal pH is 7.35 to 7.45 and HCO3 is 22 to 28 mEq/L. Renal failure typically results in acid accumulation, not excess base.

Choice B rationale

A pH of 7.30 and PaCO2 of 50 indicate respiratory acidosis. In renal failure, the lungs typically compensate for metabolic acid by hyperventilating to lower PaCO2, which is the opposite of the hypoventilation shown here.

Choice C rationale

A pH of 7.50 and PaCO2 of 32 indicate respiratory alkalosis. This state occurs when the patient hyperventilates excessively, leading to an alkaline pH, which does not align with the metabolic acidosis expected in renal disease.

Choice D rationale

Chronic kidney disease causes metabolic acidosis. A pH of 7.25 and HCO3 of 19 mEq/L demonstrate low pH and low bicarbonate. The PaCO2 of 30 mm Hg reflects respiratory compensation for the primary metabolic acid-base imbalance.