A 33-year-old woman who is 20 weeks pregnant with a porcine heart valve is at risk for thromboembolism. Which of the following is the best agent to use in this situation?

Correct Answer: A

Rationale: Pregnancy and a porcine valve increase thromboembolism risk. Heparin , an anticoagulant, is safe in pregnancy. Streptokinase , a thrombolytic, is risky. TED stockings prevent but don't treat systemic risk. Warfarin is teratogenic. Heparin's non-placental crossing ensures fetal safety while managing her condition.

Correct Answer: D

Rationale: Hypocalcemia causes muscle spasms (tetany)-nerve hyperexcitability, per classic signs-unlike bruising (coagulation), hypertension (not direct), or wasting (chronic). Spasms dominate, per assessment.

Correct Answer: B

Rationale: Fluticasone, a corticosteroid, is contraindicated with active infections (e.g., viral colds) due to immunosuppression risks . 'My kids have a head cold' suggests exposure, prompting nurse-prescriber collaboration to assess infection status. Licorice , psoriasis , and fruit don't contraindicate use. Choice B prioritizes safety, avoiding exacerbation of undetected infection.

Correct Answer: D

Rationale: Glyceryl trinitrate is well-absorbed sublingually due to bypassing the first-pass metabolism, providing rapid relief for angina by dilating blood vessels.

Correct Answer: A

Rationale: Increasing the temperature does not result in local analgesia. In fact, higher temperatures can often lead to increased pain sensitivity. Local analgesia is achieved through methods such as chemically or physically damaging nerve trunks, stimulating large fiber nerve activity, or rendering tissue anemic. These procedures work by interrupting the transmission of pain signals to the brain or by reducing the sensitivity of local nerve endings to pain stimuli.