Pharmacology IV Therapy #5

Question

Which intravenous IV solution(s) is/are considered isotonic? Select all that apply.

Answers

  1. Dextrose 5% in LR (D5LR)
    • Rationale:

      This is not the correct answer because hypertonic solutions include D10W, 3-5% NS, D5NS, D5 0.45% or ½ NS, and D5LR. It is important for the nurse to understand the differences between isotonic, hypotonic, and hypertonic solutions and reasons for their uses.

  2. 0.9% sodium chloride (0.9% NS)
    • Rationale:

      This is the correct answer because isotonic solutions are D5W, 0.9% NS, D5 0.225 NS, and LR. Isotonic solutions are solutions that have the same salt composition as the body’s cells and are commonly used in IV therapy. It is important for the nurse to understand the differences between isotonic, hypotonic, and hypertonic solutions and reasons for their uses.

  3. Lactated ringer solution (LR)
    • Rationale:

      This is the correct answer because isotonic solutions are D5W, 0.9% NS, D5 0.225 NS, and LR. Isotonic solutions are solutions that have the same salt composition as the body’s cells and are commonly used in IV therapy. It is important for the nurse to understand the differences between isotonic, hypotonic, and hypertonic solutions and reasons for their uses.

  4. Dextrose 5% in water (D5W)
    • Rationale:

      This is the correct answer because isotonic solutions are D5W, 0.9% NS, D5 0.225 NS, and LR. Isotonic solutions are solutions that have the same salt composition as the body’s cells and are commonly used in IV therapy. It is important for the nurse to understand the differences between isotonic, hypotonic, and hypertonic solutions and reasons for their uses.

  5. 0.45% sodium chloride (0.45% or ½ NS)
    • Rationale:

      This is not the correct answer because 0.45% sodium chloride (0.45% or ½ NS) is a hypotonic solution. Isotonic solutions are D5W, 0.9% NS, D5 0.225 NS, and LR.

  6. Dextrose 10% in water (D10W)
    • Rationale:

      This is not the correct answer because hypertonic solutions include D10W, 3-5% NS, D5NS, D5 0.45% or ½ NS, and D5LR. It is important for the nurse to understand the differences between isotonic, hypotonic, and hypertonic solutions and reasons for their uses.

Overview

Isotonic IV solutions help maintain the body’s fluid levels and normal pH since it contains the same salt composition as the body’s cells. Isotonic solutions are the most common IV solutions utilized in medical facilities and sources should be understood.

Explanation

Learning Outcomes

Isotonic solutions are solutions that have the same salt composition as the body’s cells and are commonly used in IV therapy. Isotonic solutions are D5W, 0.9% NS, D5 0.225 NS, and LR. Hypotonic solutions are 0.45% or ½ NS, and 0.33% NS. Hypertonic solutions include D10W, 3-5% NS, D5NS, D5 0.45% or ½ NS, and D5LR. It is important for the nurse to understand the differences between isotonic, hypotonic, and hypertonic solutions and reasons for their uses.

Test Taking Tip

“Iso”-tonic solutions can be remembered by understanding that it “is-so” the same as our body and cells.

Video Rationale