Which one is the best solution for treating Hypovolemic shock?

NIA - 29 January 2023

Medical & Surgical Nursing

Hard

Appeared in: NIA - 29 January 2023

Explanation

Ringer's Lactate (RL) is an isotonic crystalloid solution that rapidly expands the intravascular volume, which is the primary goal in treating hypovolemic shock.
It is considered a 'balanced' solution because its electrolyte composition (sodium, potassium, calcium, chloride) is similar to that of blood plasma.
The lactate in RL is metabolized by the liver into bicarbonate, which helps to correct the metabolic acidosis that frequently occurs in shock states due to poor tissue perfusion.
Compared to Normal Saline, RL has a lower chloride concentration, reducing the risk of inducing hyperchloremic metabolic acidosis, especially when large volumes of fluid are required for resuscitation.

Option A: While Normal Saline (NS) is also an appropriate isotonic crystalloid for resuscitation, its high chloride content (154 mEq/L) can lead to hyperchloremic metabolic acidosis when administered in large volumes, making it slightly less ideal than RL in many shock scenarios.
Option C: 5% Dextrose in water (D5W) is isotonic in the bag but acts as a hypotonic solution in the body once the dextrose is metabolized. This causes the administered free water to shift out of the intravascular space and into the cells, making it ineffective for volume expansion in shock.
Option D: 25% Dextrose is a highly hypertonic solution. Administering it during hypovolemic shock would pull fluid out of the cells and into the vascular space, worsening cellular dehydration. Its purpose is not volume resuscitation.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Fluid resuscitation in hypovolemic shock as background academic context rather than a clinical decision trigger.
In managing hypovolemic shock, the nurse's primary role is the rapid administration of resuscitation fluids as ordered, while continuously monitoring the patient's hemodynamic response (BP, HR, urine output, mental status).
Nurses must be vigilant for signs of fluid overload, especially in patients with underlying cardiac or renal disease, by assessing for crackles in the lungs, jugular venous distention, and peripheral edema.
What if? If the patient had a traumatic brain injury along with hypovolemia, Normal Saline (NS) would be the preferred crystalloid. Ringer's Lactate is slightly hypotonic relative to blood and could potentially increase intracranial pressure, which must be avoided in head trauma.

How to Approach the Question

First, identify the patient's condition: Hypovolemic shock, which signifies a critical loss of intravascular fluid volume.
Next, determine the primary treatment goal: Rapidly restore circulating volume to improve tissue perfusion and oxygen delivery.
Evaluate the options based on their properties. The ideal fluid for initial resuscitation should be isotonic to effectively expand and remain within the vascular space.
Eliminate solutions that are not designed for primary volume expansion. D5% becomes hypotonic in the body, and D25% is a hypertonic solution for treating hypoglycemia.
Compare the remaining isotonic options, NS and RL. Recall that RL is a 'balanced' solution that helps buffer acidosis and is often preferred over NS to avoid the risk of hyperchloremic acidosis associated with large-volume resuscitation.

Concept Tested & Keywords

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