Correct Answer: B

Rationale: The correct answer is B: Anterior and posterior aspects of all lung fields. When auscultating breath sounds, it is essential to listen to the front (anterior) and back (posterior) aspects of all lung fields. This comprehensive approach allows for a thorough assessment of breath sounds throughout the lungs. Choices A, C, and D are incorrect. Choice A is too limited as it only focuses on the trachea and lateral areas, not covering all lung fields. Choice C is also too limited, referring to specific sections of the lungs (mid section and lateral section). Choice D is incorrect as it suggests comparing specific lines on the chest (mid-clavicular to mid-axillary), which is not a standard practice for auscultating breath sounds.

Correct Answer: A

Rationale: The correct answer is 'Headache.' Postdural headache is a common adverse effect associated with a subarachnoid block due to cerebrospinal fluid leakage at the site of dural puncture. This headache worsens when the woman is upright and may improve when she lies flat. To manage this headache, bed rest and adequate hydration are recommended. Pruritus, vomiting, and hypertension are not typically associated with subarachnoid blocks. Pruritus, nausea, and vomiting are more commonly linked to the use of intrathecal opioids.

Correct Answer: D

Rationale: The correct answer is 'Shortness of breath.' Side effects commonly associated with Tegretol include sore throat, vertigo, and fever. Shortness of breath is not a typical side effect of Tegretol use. Sore throat, vertigo, and fever are known side effects of Tegretol, while shortness of breath is not typically linked to its use.

Correct Answer: A

Rationale: The priority nursing action for a laboring client dilated to 6 cm receiving an epidural is continuous monitoring of maternal blood pressure. This is crucial because epidural anesthesia can lead to a precipitous drop in blood pressure, which can be dangerous for both the mother and fetus by reducing cardiac output and placental perfusion. While frequent auscultation of the fetal heart rate is important, it is not the priority in this situation. Administering an IV fluid bolus of at least 500 cc may not be necessary if the client's blood pressure is stable. Monitoring the maternal temperature is also essential but takes precedence over blood pressure monitoring.

Correct Answer: B

Rationale: The given blood gas values indicate respiratory alkalosis. A high pH and low PaCO2 level are consistent with respiratory alkalosis. In this scenario, no compensation for the alkalosis is noted, ruling out metabolic acidosis or alkalosis. Metabolic conditions would usually involve changes in bicarbonate levels, which remain within the normal range in this case.