Identify the causative agent of dengue fever.

Correct Answer: D

Rationale: The causative agent of dengue fever is a virus. Dengue fever is primarily transmitted to humans by the bite of infected Aedes mosquitoes, particularly Aedes aegypti and Aedes albopictus. These mosquitoes act as vectors, carrying and transmitting the dengue virus (specifically four closely related but antigenically different serotypes: DEN-1, DEN-2, DEN-3, and DEN-4) to humans during the feeding process. The virus then replicates in the human body, causing symptoms of dengue fever. Therefore, the correct answer is D. Virus.

Correct Answer: C

Rationale: The presence of spindle-shaped cells and psammoma bodies on fine-needle aspiration biopsy is characteristic of follicular thyroid carcinoma. This type of thyroid cancer can present as a thyroid nodule associated with signs of hyperthyroidism due to the release of thyroid hormones from the cancerous thyroid cells. Hashimoto's thyroiditis is an autoimmune condition that typically presents with hypothyroidism, while Graves' disease is another autoimmune disorder that results in hyperthyroidism but is not associated with the presence of spindle-shaped cells and psammoma bodies in this context. Papillary thyroid carcinoma may also present with thyroid nodules, but it is more commonly associated with papillary structures and nuclear features rather than spindle-shaped cells seen in follicular thyroid carcinoma.

Correct Answer: A

Rationale: The patient's presentation of recurrent episodes of sudden, severe vertigo lasting hours, along with nausea, vomiting, nystagmus, and unilateral weakness on vestibular function tests, is most consistent with vestibular neuritis. Vestibular neuritis is an inflammatory disorder of the vestibular nerve, typically viral in origin, leading to acute onset of vertigo. Patients often experience severe vertigo, imbalance, nausea, and vomiting, along with characteristic nystagmus. Unilateral weakness on vestibular function testing supports the diagnosis of vestibular neuritis, as it indicates dysfunction of one vestibular organ. Benign paroxysmal positional vertigo (BPPV) typically presents with brief episodes of vertigo triggered by changes in head position without associated unilateral vestibular weakness. Ménière's disease is characterized by recurrent episodes of vertigo associated with fluctuating hearing loss, tinnitus, and aural fullness, and

Correct Answer: A

Rationale: The presentation described is consistent with anterior uveitis. Anterior uveitis involves inflammation of the iris and ciliary body. Patients typically present with symptoms such as redness, pain, photophobia, and blurred vision. The slit-lamp examination findings of ciliary injection (redness and dilation of blood vessels in the iris and ciliary body), corneal edema, and a mid-dilated pupil with a fixed reaction to light (due to ciliary muscle spasm causing decreased accommodation) are characteristic of anterior uveitis. This condition is often idiopathic but can be associated with various systemic diseases like ankylosing spondylitis, inflammatory bowel disease, and other autoimmune disorders. Treatment involves addressing the inflammation with topical corticosteroids and, in some cases, cycloplegic agents to reduce pain and inflammation.

Correct Answer: B

Rationale: Postural hypotension, also known as orthostatic hypotension, is a common issue postpartum and can cause lightheadedness when standing up. When a postpartum client expresses concern about feeling lightheaded, assessing for postural hypotension should be a priority. This assessment involves measuring the client's blood pressure while lying down, sitting, and standing to identify any significant drops in blood pressure upon changing positions. Identifying postural hypotension early allows for appropriate interventions to prevent potential falls and address the client's symptoms. Checking blood pressure, evaluating hemoglobin levels, and monitoring for signs of hemorrhage are also important assessments but may not directly address the specific issue of feeling lightheaded when standing up in this scenario.

Correct Answer: B

Rationale: The patient's presentation of severe headache, blurred vision, and fatigue, along with the laboratory findings of elevated white blood cell count, thrombocytosis, and JAK2 V617F mutation, are characteristic of essential thrombocythemia. This is a myeloproliferative neoplasm characterized by the clonal proliferation of megakaryocytes, leading to an increased platelet count. The JAK2 V617F mutation is commonly found in essential thrombocythemia and other myeloproliferative disorders. The symptoms of essential thrombocythemia can be related to the increased blood viscosity and risk of thrombosis due to the elevated platelet count. Polycythemia vera would present with elevated red blood cell count, hemoglobin, and hematocrit, along with other features such as pruritus after a hot bath. Chronic myeloid leukemia (CML

Correct Answer: B

Rationale: A prolapsed umbilical cord is a medical emergency during labor because it can cause compression of the umbilical cord, leading to decreased oxygen supply to the fetus. The priority nursing action in this situation is to prepare for an immediate cesarean section. This is necessary to quickly deliver the baby and relieve pressure on the cord, preventing potential fetal distress or death. Elevating the mother's hips may help reduce pressure on the cord temporarily, but it is not the definitive treatment for a prolapsed cord. Administering intravenous fluids rapidly may be necessary, but it is not the priority intervention when the fetus is at risk due to a prolapsed cord. Performing a vaginal examination to assess cervical dilation is contraindicated in the presence of a prolapsed umbilical cord as it can further compress the cord and worsen the situation.

Correct Answer: A

Rationale: It is important for the nurse to provide the PACU nurse with the patient's intraoperative vital signs and hemodynamic parameters as this information gives insight into the patient's stability during the surgical procedure. The PACU nurse needs this data to monitor the patient's postoperative recovery, assess for any potential complications, and establish appropriate care interventions. Understanding the patient's intraoperative status allows the PACU nurse to provide a seamless continuation of care from the operating room to the post-anesthesia care unit. The details of the surgical procedure and anesthesia administration are also important but are typically conveyed through the surgical and anesthesia records. The plan for postoperative pain management and analgesic medications is essential but can be discussed and adjusted based on the patient's current status in the PACU. Documentation of the surgical count and instrument inventory is crucial for ensuring patient safety but is typically managed by the operating room team and may not be the immediate

Correct Answer: B

Rationale: The clinical presentation of lower abdominal pain, dyspareunia (pain during sexual intercourse), dysmenorrhea (painful periods), and tender nodules along the uterosacral ligaments is highly suggestive of endometriosis. Endometriosis is a condition where the tissue that lines the uterus (endometrium) grows outside the uterus, commonly on the pelvic organs such as the ovaries, fallopian tubes, and the peritoneum. The characteristic tender nodules along the uterosacral ligaments are known as "nodularity" and are a classic finding in endometriosis.