Directions: Refer to the diagram of the syringe provided to answer the following question The nurse needs to withdraw 0.65 mL of medication into a syringe. The nurse fills the medication to which area on the syringe?
A 3
B 1
C 2
D 4
The Correct Answer and Explanation is:
To answer this question, we need to understand how to read a syringe and accurately measure the correct volume of medication.
Understanding the Syringe
Syringes are marked with lines to indicate specific volumes of liquid. The marks usually represent milliliters (mL) or fractions of a milliliter, and depending on the syringe size, the scale can differ. For example, a 3 mL syringe may have lines indicating increments of 0.1 mL, while a smaller syringe may show finer gradations such as 0.01 mL.
The most common syringe sizes used for small amounts of medication are 1 mL, 3 mL, and 5 mL syringes. For very small doses, like 0.65 mL, the increments are critical to note. On a typical 3 mL syringe, the numbers labeled next to long lines represent whole mL increments, while the shorter lines between them represent fractions of a mL (like 0.1 mL).
Analyzing the Options
- Option A (3): This represents a whole number, likely indicating 3 mL, which is far beyond the 0.65 mL the nurse needs.
- Option B (1): This is probably the 1 mL mark, also more than needed for this scenario.
- Option C (2): This likely represents the 2 mL mark, which is also too high.
- Option D (4): If this number corresponds to the small lines between the whole mL marks, it would be closer to the correct position to draw 0.65 mL. Syringes typically have 10 smaller marks between each whole number, with each small line representing 0.1 mL. To draw 0.65 mL, the nurse would fill the syringe just past the halfway point between 0.6 mL and 0.7 mL.
Correct Answer: D (4)
The nurse should withdraw the medication to the fourth small line past the 0.6 mL mark, as this would represent 0.65 mL. Accurately reading the syringe is crucial in ensuring that the correct dose of medication is administered, preventing overdoses or underdoses, which could be harmful to the patient.
Explanation
In clinical practice, even small discrepancies in medication measurement can lead to significant effects, especially for potent drugs or pediatric patients. For this reason, nurses are trained to read syringes precisely. In this case, since the nurse needs 0.65 mL, they will use a syringe with fine markings and draw the medication to just past the 0.6 mL mark to ensure the proper dose. Ensuring accuracy in dosage is vital for patient safety and effective treatment outcomes.