A nurse is preparing to administer purified protein derivative (PPD) skin test to another healthcare worker. Which of the following statements about the test is incorrect?

You will need to return in 48-72 hours to have the test read

A positive skin test will mean you need to have a follow up a chest x-ray

"induration of greater than or equal to 10 millimeters means you have been exposed

"induration of greater than or equal to 10 millimeters means you have active tuberculosis

Answer and Explanation

The Correct Answer is D

A. You will need to return in 48-72 hours to have the test read:
This statement is correct. The purified protein derivative (PPD) skin test, also known as the tuberculin skin test (TST), must be read within 48-72 hours after administration. If the test is not read within this timeframe, the results may not be valid, and the test may need to be repeated. The test evaluates the presence of induration (swelling) at the injection site, which indicates a delayed-type hypersensitivity reaction to the tuberculosis antigen.

B. A positive skin test will mean you need to have a follow-up chest x-ray:
This statement is correct. A positive PPD skin test indicates exposure to Mycobacterium tuberculosis (the bacteria that causes tuberculosis). However, a positive result does not necessarily mean the person has active tuberculosis. A follow-up chest x-ray is typically recommended to determine whether active TB disease is present. The chest x-ray helps to assess for signs of active infection, such as lung lesions.

C. "Induration of greater than or equal to 10 millimeters means you have been exposed":
This statement is correct. In the context of a PPD skin test, induration (raised area of the skin) of 10 millimeters or more is generally considered a positive result, indicating exposure to tuberculosis. However, the exact threshold for what is considered positive can vary based on individual risk factors. A positive test means the person has been exposed to the tuberculosis bacteria, but it does not confirm active disease.

D. "Induration of greater than or equal to 10 millimeters means you have active tuberculosis":
This statement is incorrect. A positive PPD skin test result indicates exposure to Mycobacterium tuberculosis, but it does not confirm active tuberculosis (TB) infection. The induration reflects prior exposure or latent infection. To determine if the individual has active TB, additional diagnostic tests such as a chest x-ray, sputum cultures, and possibly a molecular test are required. A positive PPD result does not differentiate between latent TB infection and active TB disease.

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Correct Answer is C

Explanation

A. Having the patient splint their incision site when coughing and deep breathing:
While splinting the incision site can help alleviate pain and prevent strain on the surgical wound during coughing and deep breathing, it is not a primary intervention for preventing surgical site infection. Infection prevention is more directly related to sterile technique, antibiotic prophylaxis, and maintaining a clean environment around the wound. Splinting can support postoperative recovery, but it does not directly prevent infection.

B. Offering around the clock pain medication in the immediate post-operative phase:
Providing pain medication is important for patient comfort and to facilitate early mobilization after surgery. However, pain management does not directly prevent surgical site infections. The focus for infection prevention lies in maintaining sterility, administering antibiotics as prescribed, and appropriate wound care rather than pain control alone.

C. Administering prescribed pre-operative antibiotics within 30-60 minutes of surgery:
The administration of prophylactic antibiotics before surgery, typically within 30-60 minutes of the incision, is a primary intervention for preventing surgical site infections (SSIs). This timing ensures that the antibiotics are at therapeutic levels in the bloodstream when the surgical procedure begins, reducing the risk of introducing bacteria into the surgical site. This is a well-established guideline for infection prevention in surgical settings.

D. Performing the first dressing change on a new surgical site in the postoperative setting:
The first dressing change should generally be done by a healthcare professional using sterile technique. However, the timing and handling of the first dressing change are more related to wound care practices rather than a primary strategy for preventing infection. Infection prevention primarily involves proper antibiotic prophylaxis, maintaining a sterile field, and managing the surgical site during the early post-operative period. The first dressing change, while important for wound healing, is not the most immediate or primary intervention for preventing surgical site infection.

Correct Answer is ["2"]

Explanation

Given:

Desired dose: Dextromethorphan 30 mg PO

Available concentration: Dextromethorphan oral liquid 75 mg/5 mL

To find:

Volume to administer (in mL)

Step 1: Set up the proportion

We can use the following proportion to solve the problem:

(Desired dose) / (Available concentration) = Volume to administer

Step 2: Substitute the values

Plugging in the given values, we get:

(30 mg) / (75 mg/5 mL) = Volume to administer

Step 3: Simplify

To simplify, we can invert the denominator and multiply:

(30 mg) x (5 mL / 75 mg) = Volume to administer

The "mg" units cancel out, leaving us with:

(30 x 5 mL) / 75 = Volume to administer

Step 4: Calculate

Performing the multiplication and division, we get:

150 mL / 75 = Volume to administer

2mL = Volume to administer

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A nurse is preparing to administer purified protein derivative (PPD) skin test to another healthcare worker. Which of the following statements about the test is incorrect?

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Naxlex Comprehensive Predictor Exams

The nurse identifies which of the following as one of the primary nursing interventions for preventing surgical site infection?

Correct Answer is C

Explanation

A nurse is preparing to administer dextromethorphan 30 mg PO. The amount available is dextromethorphan oral liquid 7.5 mg/5mL. How many should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero)

Correct Answer is ["2"]

Explanation

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