When a nurse is preparing an injection from an ampule, which of these actions should be taken when withdrawing the medication from the ampule?
Use a large bore needle.
Use a filter needle.
Use a small gauge needle.
Place a cotton ball over the opening to prevent being cut while withdrawing the medication.
The Correct Answer is B
Choice A rationale
Using a large bore needle (e.g., 18-gauge) for withdrawing medication from an ampule is generally avoided unless the medication is highly viscous, because it can create a larger hole in the ampule, increasing the risk of glass particle introduction. The primary concern with ampules is preventing glass shards from entering the syringe, which is addressed by filtration, not needle bore size alone.
Choice B rationale
Ampules are single-dose glass containers. When an ampule is opened, small, invisible glass fragments can break off. A filter needle contains a microscopic filter that traps these glass particles, preventing their aspiration into the syringe and subsequent injection into the patient, thus mitigating the risk of phlebitis, emboli, or other complications from particulate matter.
Choice C rationale
A small gauge needle (e.g., 25-gauge) has a very narrow lumen, which would make withdrawing medication from an ampule unnecessarily difficult and slow, especially for viscous solutions. Furthermore, a small gauge needle does not mitigate the risk of glass particle aspiration, which is the paramount concern when withdrawing medication from a glass ampule.
Choice D rationale
Placing a cotton ball over the opening of an ampule is not a scientifically sound method to prevent being cut or to prevent glass shards from entering the medication. Ampules are designed to be broken cleanly. Proper ampule opening techniques and the use of a filter needle are the established safety measures to prevent injury and contamination.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
The head-to-toe format does not exclude unnecessary body systems; rather, it aims to systematically include all major body systems to ensure a comprehensive assessment. Excluding systems could lead to missed findings and an incomplete understanding of the patient's health status. A thorough examination requires a complete survey, even if initial symptoms point to a specific area, to identify any related or unrelated issues.
Choice B rationale
A head-to-toe approach provides a structured and systematic method for examining all body systems. This ensures that no area is overlooked, promoting a comprehensive data collection process. It allows for a logical flow, minimizing omissions and facilitating the identification of interconnections between different bodily functions. This organization enhances efficiency and thoroughness in clinical assessment.
Choice C rationale
The head-to-toe approach does not mandate that painful procedures be done first. In fact, best practice dictates that painful or uncomfortable assessments should generally be deferred until the end of the examination to maintain patient cooperation and trust. Starting with non-painful assessments allows the patient to acclimate and reduces anxiety, improving the overall quality of the examination.
Choice D rationale
A head-to-toe assessment does not reduce time by examining only one side of the body. A comprehensive physical examination requires bilateral assessment of most structures and systems to identify asymmetries or unilateral abnormalities. Limiting the examination to one side would provide an incomplete and potentially misleading clinical picture. Full evaluation ensures all relevant data are collected.
Correct Answer is ["0.5"]
Explanation
Step 1: The order is 10,000 units.
Step 2: The available concentration is 20,000 units per 1 mL.
Step 3: Calculate the volume to administer: 10,000 units ÷ (20,000 units ÷ 1 mL) = 0.5 mL. Answer: 0.5 mL.
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