Correct Answer: B

Rationale: The clinical scenario described is consistent with a diagnosis of anterior epistaxis due to a prominent vascular lesion located in Little's area, which is an important site for nosebleeds. Silver nitrate cautery is the most appropriate intervention for managing this condition. Silver nitrate cautery is a commonly used method to chemically cauterize and eliminate the friable blood vessels responsible for recurrent epistaxis. It is a cost-effective and minimally invasive technique that can be easily performed in an outpatient setting. Nasal packing with anterior nasal tampons might be considered in cases of severe or refractory epistaxis, but in this scenario, where the source of bleeding is localized and identifiable, silver nitrate cautery is the treatment of choice. Endoscopic cauterization of the sphenopalatine artery and surgical excision of a nasal polyp are unnecessary and overly invasive for the described scenario.

Correct Answer: C

Rationale: A discectomy is a surgical procedure commonly performed to decompress the nerve root by removing a portion of the herniated disc that is pressing on the nerve. In cases of herniated discs causing radicular symptoms (such as pain radiating down the leg), a discectomy can help alleviate the compression on the nerve, reduce symptoms, and improve the patient's condition. This procedure involves removing the portion of the disc that is herniated or bulging out to relieve pressure on the nerve root, allowing for improved function and reduced pain. Spinal fusion, laminectomy, and foraminotomy are other surgical procedures that are not typically performed for the direct decompression of the nerve root in cases of herniated discs at a specific level like the L5-S1 level.

Correct Answer: C

Rationale: Cryptosporidium parvum is a protozoan parasite often found in contaminated water sources. This parasite is known to cause watery diarrhea, abdominal cramps, and nausea in infected individuals. The presence of oocysts in the stool sample is characteristic of Cryptosporidium infection. Other parasitic infections may present with similar symptoms, but in this case, the most likely culprit based on the exposure history and laboratory findings is Cryptosporidium parvum.

Correct Answer: A

Rationale: Grilled chicken breast is a suitable choice for a low-phosphorus diet because poultry is typically lower in phosphorus compared to dairy products (like cheese), nuts (like almonds), and whole grains (like wheat toast). This option indicates an understanding of the need to restrict phosphorus intake, which is important for individuals with chronic kidney disease to prevent complications.

Correct Answer: A

Rationale: Battery refers to the intentional touching of another person without consent, resulting in harm or offense. In this scenario, the nurse inserted the urinary catheter into the client's urethra without the client's consent, leading to an injury. This action constitutes battery as the nurse carried out a medical procedure without the client's permission, resulting in harm to the client. The client can sue the nurse for battery in this situation.