Correct Answer: A

Rationale: Following total hip arthroplasty (THA), patients are at an increased risk of developing deep vein thrombosis (DVT) due to factors such as immobility, surgery-related vascular damage, and hypercoagulability. DVT refers to the formation of blood clots in the deep veins, typically in the lower extremities. These clots can break loose and travel to the lungs, causing a potentially life-threatening condition called pulmonary embolism (PE). Therefore, monitoring for signs and symptoms of DVT is crucial in the immediate postoperative period to promptly detect and prevent the development of complications such as PE. Common signs of DVT include leg swelling, pain, warmth, and redness. Additionally, healthcare providers may employ preventive measures such as early ambulation, compression stockings, and anticoagulant therapy to reduce the risk of DVT post-THA surgery.

Correct Answer: D

Rationale: The presentation described in the question – sudden-onset unilateral headache along with ipsilateral ptosis, miosis, and anhidrosis – is characteristic of Horner syndrome. Horner syndrome is caused by disruption of the sympathetic nerve pathway and can occur in trigeminal neuralgia. Trigeminal neuralgia is a painful condition affecting the trigeminal nerve commonly characterized by sudden and severe facial pain that can be triggered by various stimuli. The involvement of the sympathetic pathway in trigeminal neuralgia can lead to Horner syndrome symptoms such as ptosis (drooping eyelid), miosis (constricted pupil), and anhidrosis (lack of sweating) on the affected side of the face. Cluster headaches usually involve severe unilateral pain around the eye, but they do not typically present with Horner syndrome symptoms. Migraine and tension-type headaches also do not typically present with Horner syndrome symptoms.

Correct Answer: B

Rationale: T cell exhaustion is a state of T cell dysfunction that arises during chronic viral infections or cancer. In the case of a chronic viral infection, the persistent exposure to viral antigens leads to continuous stimulation of CD8+ cytotoxic T cells. Over time, this sustained stimulation can lead to T cell exhaustion, characterized by the upregulation of inhibitory receptors, impaired effector functions, and reduced proliferative capacity. As a result, despite the elevated levels of CD8+ T cells in the blood, their function may be compromised, ultimately impacting the immune response against the viral infection. In contrast, activation-induced cell death (AICD) may contribute to T cell loss during chronic infections but would not explain the persistently elevated CD8+ T cell levels. Thymic involution refers to the age-related decline in thymus function, which is not directly related to the observed increase in CD8+ T cells. Antigenic

Correct Answer: A

Rationale: The ethical principle that should guide the nurse's decision-making in this situation is beneficence, which emphasizes the nurse's obligation to act in the best interest of the patient. In this scenario, the nurse must balance the patient's request for pain medication with considerations related to the patient's history of substance abuse. The nurse should prioritize providing effective pain relief for the patient while also considering the potential risks of administering medication to someone with a history of substance abuse. By focusing on beneficence, the nurse can make decisions that promote the well-being and best interests of the patient, taking into account both the immediate need for pain relief and the patient's history of substance abuse.

Correct Answer: B

Rationale: In Stage I of Hodgkin's disease, the most commonly seen early symptom is usually unexplained fever and night sweats. Other common symptoms at this stage may include unexplained weight loss, itching, and enlarged lymph nodes in the neck, underarms, or groin. Chest and back pains, subnormal body temperature, and swelling of extremities are not typically early indicators of Stage I Hodgkin's disease.