A patient with depressed consciousness has lab report: blood sugar 586 mg/dl, urine ketone +++ . Which IV flu… - NCL (MP) Nursing Officer - 2020

NCL (MP) Nursing Officer - 2020

Medical & Surgical Nursing

Medium

Appeared in: NCL (MP) Nursing Officer - 2020

Explanation

The patient's signs and symptoms—severe hyperglycemia, high ketones, and altered mental status—are hallmark indicators of Diabetic Ketoacidosis (DKA).
The first and most critical step in managing DKA is to correct severe dehydration and restore circulating volume, which has been depleted due to osmotic diuresis.
9% Normal Saline (NS) is the standard isotonic crystalloid solution recommended for initial fluid resuscitation in DKA.
Administering NS helps to dilute blood glucose, improve renal perfusion to clear glucose and ketones, and stabilize hemodynamic status without adding extra glucose.

Option B: This fluid contains dextrose (glucose). Administering glucose to a patient with a blood sugar of 586 mg/dL is contraindicated and would worsen the severe hyperglycemia.
Option C: While Ringer's Lactate (RL) is an isotonic solution, 0.9% NS is the universally recommended first-line fluid for initial DKA resuscitation. Additionally, insulin should be administered via a separate, controlled IV infusion for precise titration, not mixed into the main fluid bag.
Option D: This is incorrect because a clear, standard-of-care fluid is preferred for this life-threatening emergency.

Clinical Relevance

Nursing practice connection: Use the key finding related to Initial fluid management in Diabetic Ketoacidosis (DKA) to guide bedside assessment, documentation, and the next nursing action.
A nurse's primary role in early DKA management is rapid IV access, prompt administration of prescribed isotonic fluids, and meticulous monitoring of vital signs, glucose levels, and neurological status.
Failure to promptly rehydrate a patient in DKA can lead to hypovolemic shock, acute kidney injury, and poor tissue perfusion, which worsens the metabolic acidosis and overall prognosis.
What if the patient's initial potassium level was low (e.g., less than 3.3 mEq/L)? The nurse must anticipate an order to HOLD insulin and administer potassium replacement first. Starting insulin would drive potassium into the cells, causing life-threatening hypokalemia and cardiac arrhythmias.

How to Approach the Question

First, analyze the patient's clinical data: The combination of very high blood sugar (586 mg/dL), high urine ketones (+++), and altered mental status (depressed consciousness) is a classic presentation of Diabetic Ketoacidosis (DKA).
Recall the priorities of DKA management. The first step is always fluid resuscitation to correct severe dehydration before addressing hyperglycemia with insulin.
Evaluate the IV fluid options based on the immediate goal. The fluid must restore volume without increasing the blood sugar. Therefore, any fluid containing dextrose (like DNS) is immediately ruled out for initial therapy.
Compare the remaining isotonic options. According to established guidelines, 0.9% Normal Saline (NS) is the standard, recommended initial fluid for DKA resuscitation.
Based on this reasoning, select NS as the most appropriate initial IV fluid.

Concept Tested & Keywords

Concept Tested: Initial fluid management in Diabetic Ketoacidosis (DKA)
Stem keywords: depressed consciousness, blood sugar 586 mg/dl, urine ketone +++, IV fluid
Lead-in keywords: preferable
Clinical cues: Depressed consciousness: Indicates severe metabolic derangement affecting brain function.
Clinical cues: Blood sugar 586 mg/dL: Severe hyperglycemia.

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