For treatment of hypovolemic shock, which IV fluid is given?

RUHS, Jaipur, M.Sc Nursing Entrance Exam-2015

Fundamental of Nursing

Easy

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2015

Explanation

Normal saline at 0.9% is an isotonic crystalloid solution, meaning its salt concentration is similar to that of blood plasma.
When administered, it primarily stays within the intravascular (blood vessel) space, rapidly expanding the circulating blood volume.
This volume expansion increases blood pressure and improves perfusion to vital organs, directly counteracting the effects of hypovolemic shock.
Along with Lactated Ringer's solution, 0.9% NS is the standard first-line fluid for emergency resuscitation.

Option A: Normal saline at 0.45% is a hypotonic solution. It causes fluid to shift from the intravascular space into the intracellular space, which would further decrease the circulating volume and worsen hypotension in a patient with hypovolemic shock.
Option B: Dextrose at 5% (D5W) is isotonic in the bag but becomes hypotonic in the body once the dextrose is metabolized. The remaining free water moves into cells and does not effectively expand the intravascular volume needed to treat shock.
Option D: Normal saline at 3% is a hypertonic solution. It is a high-risk medication that aggressively pulls fluid from the cells into the bloodstream. It is not used for routine volume resuscitation due to the risk of causing severe hypernatremia, fluid overload, and osmotic demyelination syndrome.

Clinical Relevance

Nursing practice connection: Prioritize focused assessment, early escalation, and real-time monitoring when managing IV Fluid Management in Hypovolemic Shock in acute care settings.
In an emergency, the nurse's primary role is to establish large-bore IV access (e.g., 16 or 18 gauge) to allow for rapid infusion of isotonic fluids.
Continuous monitoring of vital signs (blood pressure, heart rate), urine output (at least 0.5 mL/kg/hr), and mental status is crucial to assess the patient's response to fluid resuscitation.
Nurses must also watch for signs of fluid overload, such as crackles in the lungs, shortness of breath, and jugular vein distention, especially in patients with underlying cardiac or renal conditions.

How to Approach the Question

First, identify the core clinical problem presented in the question: 'hypovolemic shock'.
Recall the primary goal of treating hypovolemic shock, which is to rapidly restore the volume of fluid within the blood vessels (intravascular volume).
Analyze each IV fluid option based on its tonicity (isotonic, hypotonic, or hypertonic) and how that affects fluid movement in the body.
An isotonic solution has the same concentration as blood and will stay in the vessels to increase volume.
A hypotonic solution has a lower concentration and will cause fluid to leave the vessels and enter cells, making shock worse.
A hypertonic solution has a higher concentration and is used for specific electrolyte or cerebral edema issues, not initial shock resuscitation.

Concept Tested & Keywords

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