The physician orders 350,000 units of Penicillin G IM now for a patient with a positive strep infection.
What is the most appropriate diluent amount for this patient? See LABEL #1 (Penicillin G)
The Correct Answer is ["9.6"]
Step 1 is: Locate the section on the Penicillin G label that provides reconstitution instructions for intramuscular (IM) injection.
Step 2 is: Identify the desired dose of Penicillin G, which is 350,000 units.
Step 3 is: Examine the label to find the different dilution options and the resulting concentration (units/mL) for IM administration. The label provides the following reconstitution guidelines for IM injection:. Add 9.6 mL of sterile water for injection to yield 1,000,000 units/mL (Total volume: 10 mL). Add 4.6 mL of sterile water for injection to yield 2,000,000 units/mL (Total volume: 5 mL).
Step 4 is: Determine which dilution would be most appropriate for administering 350,000 units. Using the 1,000,000 units/mL concentration:. Volume to administer = Desired dose ÷ Concentration. Volume to administer = 350,000 units ÷ 1,000,000 units/mL = 0.35 mL. Using the 2,000,000 units/mL concentration:. Volume to administer = Desired dose ÷ Concentration. Volume to administer = 350,000 units ÷ 2,000,000 units/mL = 0.175 mL.
Step 5 is: Consider the practicalities of administering such small volumes. While both are technically correct, administering 0.35 mL is generally easier and more accurate than 0.175 mL with standard syringes. Therefore, diluting to yield 1,000,000 units/mL is the more appropriate choice. The question asks for the most appropriate diluent amount, which corresponds to this concentration. To achieve a concentration of 1,000,000 units/mL, 9.6 mL of diluent should be added.
Final Answer: The most appropriate diluent amount is 9.6 mL of sterile water for injection to yield a concentration of 1,000,000 units/mL, and then administer 0.35 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
While documentation can be reviewed by providers, its primary purpose is not to monitor nurses' performance. Monitoring occurs through various quality assurance processes, and documentation serves a broader range of functions beyond individual nurse oversight.
Choice B rationale
Documentation acts as a central communication hub for all members of the healthcare team, including physicians, nurses, therapists, and other specialists. It ensures continuity of care by providing a shared understanding of the client's condition, treatments, and responses, facilitating informed decision-making and collaboration.
Choice C rationale
Although documentation can be used for audits, such as financial or quality audits, this is not its primary purpose. The main goal of documentation is to provide a comprehensive record of patient care for effective communication and continuity.
Choice D rationale
While accurate documentation supports billing and reimbursement processes from various payers, including government entities, this is a secondary outcome. The primary aim of documentation is to ensure high-quality patient care through clear and comprehensive information sharing.
Correct Answer is A
Explanation
Choice A rationale
Reading back the order ensures accuracy and allows the physician to immediately correct any misheard or misinterpreted information. This step is crucial for patient safety as it verifies the details of the medication order before it is implemented.
Choice B rationale
While double-checking with another nurse is a good practice, the immediate priority after receiving a telephone order is to confirm the order directly with the prescriber to avoid any initial misunderstanding.
Choice C rationale
Authorizing the order with the pharmacy occurs after the order has been received and verified. The pharmacy then prepares and dispenses the medication based on the confirmed order.
Choice D rationale
Withholding the medication could delay necessary treatment. The priority is to verify the order promptly and then proceed with safe administration. Many institutions allow for a limited time frame for the written order to follow a telephone order.
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