Nokea
Match each IV fluid with the appropriate term that accurately describes the solution's tonicity: 1/2 NS
- A. Isotonic
- B. Hypotonic
- C. Hypertonic
Correct Answer: B
Rationale: 1/2 NS (0.45% NS) is hypotonic, promoting fluid shift into cells.
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The health care provider has ordered the IV to infuse at 30 mL/hr. The tubing's drop factor is 60. Calculate the gravity infusion rate.
Correct Answer: 30 gtt/min
Rationale: Formula: (30 mL ? 60 gtt/mL) ÷ 60 min = 1800 ÷ 60 = 30 gtt/min.
Match each IV fluid with the appropriate term that accurately describes the solution's tonicity: D5\%NS
- A. Isotonic
- B. Hypotonic
- C. Hypertonic
Correct Answer: C
Rationale: D5%NS is hypertonic due to added dextrose, increasing osmolarity above plasma.
The health care provider has ordered the IV to infuse at 75 mL/hr. The tubing's drop factor is 10. Calculate the gravity infusion rate. Show your work:
Correct Answer: 13 gtt/min
Rationale: Formula: (75 mL ? 10 gtt/mL) ÷ 60 min = 750 ÷ 60 = 12.5, rounded to 13 gtt/min.
Which of the following rates would be considered to be a 'keep the vein open' rate?
- A. 30 mL/hr
- B. 75 mL/hr
- C. 80 mL/hr
- D. 100 mL/hr
Correct Answer: A
Rationale: A 'keep vein open' rate is typically low, around 20-30 mL/hr, to maintain patency without significant fluid delivery.
You are about to attempt to initiate an IV on a 97-year-old female with tiny, fragile veins. Which of the following access devices would most likely be your best choice?
- A. 27 g ? 1 in winged butterfly without cannula
- B. 22 g ? 1¼ in intracath
- C. 25 g ? 1 in winged butterfly with cannula
- D. 23 g ? 1 in intracath
Correct Answer: C
Rationale: A $25 \mathrm{~g}$ winged butterfly with cannula is small and suitable for fragile veins, providing stability and reducing trauma.