Which type of solution is commonly used for the fluid replacement in burns?

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2023

Medical & Surgical Nursing

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2023

Explanation

Hartmann's solution, also known as Lactated Ringer's (LR), is the preferred isotonic crystalloid for initial fluid resuscitation in burn patients.
Its electrolyte composition closely resembles that of blood plasma, making it highly effective for restoring intravascular volume.
The lactate in the solution is metabolized by the liver into bicarbonate, which helps to correct the metabolic acidosis frequently seen in severe burns.
It is considered a 'balanced' solution, which avoids the complications associated with large-volume infusions of unbalanced fluids.

Option B: While Normal Saline (0.9% NaCl) is an isotonic fluid that expands volume, its high chloride concentration can lead to hyperchloremic metabolic acidosis when administered in the massive quantities required for burn resuscitation.
Option C: 5% dextrose in water (D5W) is isotonic in the bag but becomes hypotonic once the body metabolizes the dextrose. The free water then moves into the interstitial and intracellular spaces, failing to expand the intravascular volume and potentially worsening tissue edema and causing hyponatremia.
Option D: This is a hypertonic solution and is not used for initial fluid resuscitation in burns. The primary goal is to replace lost isotonic fluid from the vascular space. Dextrose-containing solutions are generally avoided in the first 24 hours unless hypoglycemia is a specific concern.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Fluid Resuscitation in Burn Management as background academic context rather than a clinical decision trigger.
The nurse's most critical role during burn resuscitation is the meticulous monitoring of urine output (target 0.5-1 mL/kg/hr for adults), as it is the single most reliable indicator of adequate fluid resuscitation and tissue perfusion.
Nurses are responsible for accurately calculating and administering fluids according to protocols like the Parkland formula, ensuring half of the 24-hour total is given in the first 8 hours from the time of injury, not from the time of hospital admission.
Continuous assessment of vital signs, level of consciousness, and peripheral perfusion is essential to evaluate the patient's response to fluid therapy and detect signs of shock or fluid overload.

How to Approach the Question

First, identify the key clinical scenario: fluid replacement for a burn patient.
Recall the primary pathophysiological problem in severe burns: massive fluid loss from the vascular space leading to hypovolemic shock and metabolic acidosis.
Analyze the goal of fluid therapy: to restore intravascular volume with a fluid that is similar in composition to the lost plasma and does not cause further metabolic derangement.
Evaluate the options. The ideal fluid should be an isotonic crystalloid. This narrows the choice to Hartmann's solution and Normal Saline.
Compare the 'balanced' Hartmann's solution against the 'unbalanced' Normal Saline. Remember that large volumes of Normal Saline can cause hyperchloremic metabolic acidosis, a significant risk in burn patients who are already acidotic.
Conclude that Hartmann's solution is the superior choice because it effectively restores volume while its lactate component helps buffer acidosis.

Concept Tested & Keywords

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