A nurse is assisting with the admission of a client who has limited mobility. Which of the following actions is the nurse's priority?

• Repeat quantitative B-hCG level: Monitoring the trend of quantitative beta-hCG levels is crucial in suspected ectopic pregnancy. Falling or plateauing hCG levels confirm the diagnosis and guide the management plan, especially if methotrexate is administered or surgical intervention is considered.

• Methotrexate IM: Methotrexate is an anticipated prescription for the medical management of a stable ectopic pregnancy. It works by stopping the growth of rapidly dividing cells and is appropriate when the client is hemodynamically stable and the ectopic pregnancy is unruptured.

• Blood typing: Blood typing is essential to determine Rh factor status. If the client is Rh-negative, Rh immune globulin should be administered to prevent isoimmunization, which could impact future pregnancies. This is a standard part of the care plan for any pregnancy loss or threatened pregnancy complication.

• Transvaginal ultrasound: A transvaginal ultrasound is needed to confirm the location of the pregnancy. In ectopic pregnancies, it helps visualize the presence or absence of an intrauterine gestational sac and may directly identify ectopic implantation, such as in the fallopian tube.

• Cervical cerclage: Cervical cerclage is contraindicated in this case. It is used to prevent preterm birth in clients with cervical insufficiency but is not appropriate in a non-viable pregnancy or suspected ectopic pregnancy. Placing a cerclage could worsen the clinical situation and delay necessary treatment.

• request a prescription for an increase in statin medication: Although the client's total cholesterol is elevated at 230 mg/dL, adjusting lipid management is not the immediate priority during an acute chest pain episode. The immediate focus should be stabilizing airway, breathing, and circulation.
• prepare the client for cardiac catheterization: Cardiac catheterization may ultimately be needed to assess coronary artery blockages, but before this, the client must be stabilized with oxygen and medications to control chest pain and improve oxygenation.
• administer oxygen at 2 L/min via nasal cannula: The client’s oxygen saturation dropped to 92% on room air, which is low for someone experiencing chest pain and possible myocardial ischemia. Administering supplemental oxygen improves myocardial oxygen supply and reduces cardiac workload, addressing airway and breathing priorities.
• check a STAT cardiac troponin: The client’s initial troponin level was normal, but troponin can take several hours to rise after myocardial injury. While monitoring serial troponins is important, managing oxygenation and chest pain relief takes precedence right now.
• administer sublingual nitroglycerin: After ensuring oxygenation, sublingual nitroglycerin should be administered to relieve chest pain by dilating coronary arteries and decreasing myocardial oxygen demand. It helps reduce ischemia and may prevent further cardiac injury.
• request a prescription for a beta-blocker: Beta-blockers help control heart rate and blood pressure but are not the immediate first-line response for active chest pain and oxygen desaturation. Oxygen and nitroglycerin must be prioritized first to address the acute ischemic event.