A 5-year-old child has suffered second-degree thermal burns over 30% of her body. Forty-eight hours after the burn injury; the nurse must begin to monitor the child for which one of the following complications?

1. A

   Fluid volume deficit

2. B

   Fluid volume excess

3. C

   Decreased cardiac output

4. D

   Severe hypotension

Appeared in: NORCET 5 mains

Explanation

Listen in Hindi

• Fluid volume excess because the 48-hour mark signifies the beginning of the acute phase of burn injury.
• During this phase, capillary permeability begins to normalize, and the large volumes of fluid that shifted into the interstitial tissues (third-spacing) during the first 48 hours start to move back into the intravascular space.
• This fluid remobilization, combined with the ongoing intravenous fluid resuscitation, can lead to circulatory overload, also known as hypervolemia or fluid volume excess.
• The kidneys respond to this increased vascular volume by producing large amounts of urine, a process called diuresis. The nurse's focus shifts from preventing hypovolemic shock to preventing complications of fluid overload like pulmonary edema.

Why Other Options Were Wrong

• Option A: This is the primary complication during the first 24-48 hours (emergent phase) due to massive fluid loss from the vascular space into the tissues.
• Option C: This is a direct consequence of the fluid volume deficit and hypovolemic shock that occurs in the initial emergent phase, not the acute phase.
• Option D: This is a classic sign of hypovolemic (burn) shock, which is the main threat in the first 24-48 hours. By the 48-hour mark, with fluid remobilization, blood pressure should stabilize or may even increase.

Related Visual

• Visual 1: Flowchart - A flowchart illustrating the two phases of fluid shifts in burn injury. The first part shows fluid moving from vessels to tissues (Emergent Phase: 0-48 hrs) leading to edema and hypovolemia. The second part shows fluid moving from tissues back to vessels (Acute Phase: 48+ hrs) leading to diuresis and risk of hypervolemia.
• Visual 2: Diagram - A diagram comparing the signs of fluid volume deficit (hypovolemia) versus fluid volume excess (hypervolemia). This would include things like weak/thready pulse vs. bounding pulse, hypotension vs. hypertension, and decreased vs. increased central venous pressure.

Clinical Relevance

• Nursing practice connection: Safe nursing care depends on performing Pathophysiology of fluid shifts and complications in major burn injuries in the correct sequence, documenting the action clearly, and monitoring for the expected response.
• Nurses must perform meticulous assessments for fluid overload starting around 48 hours post-burn. This includes hourly intake and output, daily weights, and frequent auscultation of lung sounds for crackles, which indicate pulmonary edema.
• Monitoring for a shift from low urine output (oliguria) during the emergent phase to high urine output (diuresis) in the acute phase is a key indicator that fluid remobilization has begun.
• What if? If the child's urine output remains low or decreases after 48 hours despite adequate fluid administration, it could signal the onset of acute kidney injury (AKI), a serious complication of major burns. The nurse must report this finding immediately.

How to Approach the Question

• First, identify the key clinical details in the question: a major burn (30% TBSA) in a child.
• Next, pinpoint the most critical piece of information: the timeframe, which is '48 hours after the burn injury'.
• Recall the pathophysiology of major burns, which involves two distinct phases of fluid dynamics: the emergent/resuscitative phase and the acute/diuretic phase.
• Associate the first 48 hours with the emergent phase, where the primary risk is fluid volume deficit (hypovolemia) due to capillary leakage.
• Recognize that the 48-hour mark signals the beginning of the acute phase, where the fluid shifts back into the vascular system, creating a risk of fluid volume excess (hypervolemia).
• Evaluate the options based on this timeline. Eliminate options related to hypovolemia (fluid deficit, decreased cardiac output, hypotension) and select the option related to hypervolemia.

Concept Tested & Keywords

• Concept Tested: Pathophysiology of fluid shifts and complications in major burn injuries.
• Stem keywords: second-degree thermal burns, 30% of her body, 5-year-old child, 48 hours after, complication
• Lead-in keywords: monitor for
• Clinical cues: The timeframe '48 hours after the burn' is the most critical piece of information, as it indicates the start of the acute/diuretic phase.

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