Correct Answer: C

Rationale: The correct answer is C: Renal colic due to ureteral calculus. The sudden-onset severe colicky flank pain radiating to the groin along with tenderness over the costovertebral angle and hematuria are classic symptoms of kidney stones (ureteral calculus). The pain results from the obstruction of urine flow by the stone, leading to increased pressure and spasm in the ureter. Acute pyelonephritis (choice A) presents with fever, chills, and systemic symptoms. Renal artery embolism (choice B) typically presents with acute onset severe flank pain but is associated with risk factors like atrial fibrillation. Renal infarction (choice D) presents with sudden-onset severe flank pain but is less likely than ureteral calculus in a patient with a history of nephrolithiasis.

Correct Answer: C

Rationale: The correct answer is C: Systematic sampling. Nurse Sandy is adopting systematic sampling by selecting every third patient with MI after a random start. This method ensures equal chance of selection for each patient and maintains randomness. In contrast, simple random sampling (A) entails each patient having an equal chance of being selected independently. Stratified sampling (B) divides patients into groups based on certain characteristics, which is not the case here. Cluster sampling (D) involves grouping patients and selecting entire groups, which is different from the individual selection in this scenario.

Correct Answer: A

Rationale: Demonstrating breastfeeding positions that minimize pressure on the incision site should be the nursing intervention prioritized to address the client's concerns. This is important because it ensures that the client can breastfeed comfortably while also protecting the healing incision. By showing the client appropriate positions, such as the football hold or side-lying position, the nurse can help minimize discomfort and promote successful breastfeeding without compromising the cesarean incision's healing process. It is crucial to support the client in establishing a good latch and positioning to encourage proper milk transfer and bonding while being mindful of the incision site.

Correct Answer: B

Rationale: One potential maternal condition that may contribute to abnormal labor progression with slow cervical dilation despite regular contractions is pelvic outlet obstruction. This can occur if the maternal pelvis is too small, misshapen, or has an obstruction such as a fibroid tumor. The inadequate space in the pelvis can prevent the fetus from descending properly and can result in a prolonged or difficult labor. If suspected, interventions such as a cesarean delivery may be necessary to prevent complications for both the mother and baby. It is essential for the nurse to assess for signs of pelvic outlet obstruction and work with the healthcare team to address any issues promptly to ensure a safe delivery.

Correct Answer: A

Rationale: The correct immediate action is to inform the surgeon and anesthesiologist (Choice A) because a sudden decrease in oxygen saturation during surgery is a critical situation that requires prompt attention from the entire surgical team. The surgeon and anesthesiologist need to be made aware of the situation so that they can assess the patient's condition and make any necessary adjustments to the surgical procedure or anesthesia delivery. Increasing the flow rate of oxygen (Choice B) may help temporarily but does not address the underlying cause of the oxygen desaturation. Checking the endotracheal tube placement (Choice C) is important but may not be the immediate priority in this critical situation. Assessing the patient's respiratory status (Choice D) is important but should be done after informing the surgeon and anesthesiologist to ensure coordinated and timely interventions.