A nurse is checking the forearm of a client who received a tuberculin skin test 48 hr ago. Which of the following findings at the injection site should indicate to the nurse a positive result?
Excoriation
Firmness
Ulceration
Bleeding
The Correct Answer is B
A. Excoriation. Excoriation (skin abrasion or scratching) does not indicate a positive tuberculin skin test. A positive reaction is determined by induration (firm swelling) rather than skin irritation or superficial damage. Scratching the site can cause redness, but this is not a diagnostic sign of tuberculosis exposure.
B. Firmness. A positive tuberculin skin test is identified by the presence of induration (firm, raised swelling) at the injection site, which is measured in millimeters. The size of induration considered positive depends on the client’s risk factors. For example, ≥5 mm is positive in immunocompromised individuals, ≥10 mm in high-risk populations, and ≥15 mm in individuals with no risk factors.
C. Ulceration. Ulceration is not a typical reaction to a tuberculin skin test. If ulceration occurs, it may indicate improper injection technique, irritation, or an allergic reaction, rather than a true positive result. The test should be repeated in such cases.
D. Bleeding. Minor pinpoint bleeding at the injection site may occur due to the needle puncture but does not indicate a positive result. The key indicator of a positive test is the presence of measurable induration, not redness, bruising, or bleeding.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Insert the needle at a 45° or 90° angle. Enoxaparin is administered subcutaneously, and subcutaneous injections should be given at either a 45° or 90° angle, depending on the client’s body size and the amount of subcutaneous tissue available. A 90° angle is typically used for clients with more subcutaneous tissue, while a 45° angle is appropriate for those with less.
B. Hold the skin taut during administration. When giving subcutaneous injections, the skin should be gently pinched rather than held taut. Pinching helps ensure the medication is delivered into the fatty tissue rather than the muscle, reducing the risk of intramuscular injection, which can increase bleeding risk with anticoagulants like enoxaparin.
C. Massage the injection site after administering the enoxaparin. Massaging the injection site is contraindicated because it can cause tissue irritation, bruising, and increased risk of bleeding. Instead, gentle pressure may be applied with a gauze pad if necessary to minimize bleeding.
D. Use a 4 cm (1.6 in) needle. A needle length of 4 cm (1.6 inches) is too long for a subcutaneous injection and increases the risk of intramuscular administration, which could lead to increased bleeding and bruising. The recommended needle length for subcutaneous injections is typically ½ inch (1.25 cm) to ⅝ inch (1.6 cm) to ensure proper medication delivery.
Correct Answer is A
Explanation
A. Increase fluid intake. Clients taking lithium should increase fluid intake to 2-3 litres per day to prevent dehydration and maintain proper lithium excretion. Lithium is excreted by the kidneys, and dehydration can lead to toxic accumulation in the body. Adequate hydration also helps reduce the risk of side effects such as nephrotoxicity and lithium-induced polyuria.
B. Decrease sodium intake. Clients should not decrease sodium intake while on lithium. A low-sodium diet increases lithium reabsorption in the kidneys, leading to a higher risk of lithium toxicity. Instead, sodium intake should remain consistent, and clients should avoid excessive sodium restriction or sudden dietary changes.
C. Eat foods high in potassium. Potassium levels are not significantly affected by lithium therapy. While potassium is essential for overall health, increasing potassium intake is not a specific recommendation for lithium users. Potassium-rich foods are more relevant for clients taking diuretics (e.g., furosemide) or cardiac medications like digoxin.
D. Take the medication 1 hr before meals. Lithium is typically taken with food or milk to minimize gastrointestinal irritation. Taking it on an empty stomach can increase the likelihood of nausea and gastric discomfort, making it harder for clients to adhere to treatment. Clients should follow their provider’s instructions regarding meal timing.
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