The nurse is planning to administer a tuberculin test with a 27-gauge, 5/8-inch needle. At which angle will the nurse insert the needle?
15 degree
90 degree
30 degree
45 degree
The Correct Answer is A
A. The tuberculin test is administered intradermally, and the needle should be inserted at a 15-degree angle to ensure the medication is delivered just under the surface of the skin.
B. A 90-degree angle is used for intramuscular injections, not for intradermal tests like the tuberculin test.
C. A 30-degree angle is commonly used for subcutaneous injections and is too deep for an intradermal injection.
D. A 45-degree angle is also used for subcutaneous injections but is not suitable for intradermal injections.
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Correct Answer is B
Explanation
A. The pharmacist is responsible for filling prescriptions accurately but does not have control over how the nurse interprets the prescription once received.
B. The nurse has the ultimate responsibility for verifying and administering medications safely, including clarifying unclear prescriptions before administration.
C. The hospital has policies and systems in place to reduce errors, but accountability for individual actions lies with the nurse administering the medication.
D. The health care provider is responsible for prescribing medications accurately; however, the nurse must confirm and clarify any unclear prescriptions before administration.
Correct Answer is D
Explanation
A. The superior vena cava is responsible for returning deoxygenated blood from the upper body to the heart and is not directly involved in myocardial ischemia.
B. The carotid artery supplies blood to the brain and is not the primary focus in the context of myocardial infarction.
C. The pulmonary artery carries deoxygenated blood from the heart to the lungs and is not involved in coronary circulation.
D. The coronary arteries supply blood to the heart muscle itself. Ischemia during a myocardial infarction occurs when these arteries are blocked or narrowed, leading to a lack of blood flow and oxygen to the heart tissue.