Correct Answer: C

Rationale: In a critically ill patient admitted to the ICU with acute renal failure requiring renal replacement therapy (RRT), the healthcare team should prioritize the initiation of continuous renal replacement therapy (CRRT). CRRT is preferred in critically ill patients with hemodynamic instability as it allows for slow and continuous removal of solutes and fluids, making it a safer option compared to intermittent hemodialysis. CRRT can also provide better control of volume status and electrolyte imbalances over a longer period, which is beneficial in critically ill patients who are hemodynamically unstable. Peritoneal dialysis is not commonly used in the ICU setting for acute renal failure requiring RRT, and loop diuretics are not effective in treating acute renal failure. Temporary hemodialysis catheters may also be used, but CRRT is generally preferred in critically ill patients for better hemodynamic tolerance and control of solute and fluid removal.

Correct Answer: A

Rationale: The clinical presentation of recurrent fever, sore throat, cervical lymphadenopathy, leukocytosis with atypical lymphocytes, and positive heterophile antibody test (Monospot test) is highly indicative of infectious mononucleosis caused by the Epstein-Barr virus (EBV). EBV is a member of the herpesvirus family and is a common cause of infectious mononucleosis. The atypical lymphocytes seen on peripheral blood smear are reactive T lymphocytes responding to the EBV infection. The Monospot test detects heterophile antibodies produced in response to EBV infection.

Correct Answer: C

Rationale: In a conscious trauma patient with a suspected head injury, maintaining cervical spine immobilization is crucial. The presence of a head injury raises concerns for potential concomitant cervical spine injury. Therefore, it is vital to prevent any movement of the cervical spine to avoid exacerbating a potential spinal cord injury. Maintaining immobilization involves stabilizing the patient's head and neck in a neutral position until appropriate imaging studies can assess the extent of any spinal injury. This action helps prevent further harm and ensures the safety of the patient during assessment and management of their injuries.

Correct Answer: C

Rationale: Primary health care encompasses a wide range of essential health services. While services such as the use of appropriate technology, safe water supply, and maternal child care are components of primary health care, providing free medicines is not typically considered a core element. Primary health care emphasizes accessibility, affordability, and basic health services, but free medicines may not always be sustainable or feasible in every healthcare setting. Patients may be required to pay for medications, utilize health insurance, or receive medications through public health programs, rather than always receiving them for free.

Correct Answer: A

Rationale: The symptoms described - sudden-onset severe headache, nausea, vomiting, photophobia, neck stiffness, and positive Kernig and Brudzinski signs - are classic manifestations of meningitis. Meningitis is an inflammation of the meninges, the protective membranes covering the brain and spinal cord, often caused by infection. The sudden onset of these symptoms and signs, along with neck stiffness and positive Kernig and Brudzinski signs (indicative of meningeal irritation), strongly suggest meningitis as the most likely diagnosis in this scenario.