Nokea
A sudden, painless unilateral vision loss may be caused by which of the following?
- A. Retinal detachment
- B. Corneal ulcer
- C. Acute glaucoma
- D. Uveitis
Correct Answer: A
Rationale: A sudden, painless unilateral vision loss may be caused by a retinal detachment. Retinal detachment occurs when the retina, which is the light-sensitive tissue lining the back of the eye, pulls away from its normal position. This can lead to visual disturbances, including sudden loss of vision in one eye. Retinal detachment can be a medical emergency and requires prompt evaluation and treatment to prevent permanent vision loss. Other conditions mentioned in the choices, such as corneal ulcer, acute glaucoma, and uveitis, may also cause vision problems but are less likely to present with a sudden and painless unilateral vision loss as a primary symptom.
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Which of the following events occurs at the start of diastole?
- A. Closure of the tricuspid valve
- B. Opening of the pulmonic valve
- C. Closure of the aortic valve
- D. Production of the first heart sound (S )
Correct Answer: B
Rationale: At the start of diastole, the ventricles relax and begin to fill with blood from the atria. As this relaxation phase begins, the pulmonic valve opens to allow blood to flow from the right ventricle to the pulmonary artery and then to the lungs for oxygenation. This marks the beginning of diastole, the period of the cardiac cycle when the heart is filling with blood. The closure of the tricuspid valve, closure of the aortic valve, and production of the first heart sound (S1) occur during systole, the phase of the cardiac cycle when the heart is contracting to pump blood out to the body.
A 72-year-old teacher comes to a skilled nursing facility for rehabilitation after being in the hospital for 6 weeks. She was treated for sepsis and respiratory failure and had to be on the ventilator for 3 weeks. You are completing your initial assessment and are evaluating her skin condition. On her sacrum there is full-thickness skin loss that is 5 cm in diameter, with damage to the subcutaneous tissue. The underlying muscle is not affected. You diagnose this as a pressure ulcer. What is the stage of this ulcer?
- A. Stage 1
- B. Stage 2
- C. Stage 3
- D. Stage 4
Correct Answer: C
Rationale: A stage 3 pressure ulcer involves full-thickness skin loss with damage and necrosis of the subcutaneous tissue, but the underlying muscle is not affected. In this case, the description of the full-thickness skin loss with involvement of the subcutaneous tissue but not the muscle corresponds to a stage 3 pressure ulcer. Stage 1 involves intact skin with non-blanchable redness, stage 2 involves partial-thickness skin loss with a shallow open ulcer, and stage 4 involves full-thickness tissue loss with the involvement of muscle, bone, or supporting structures.
A patient presents for evaluation of a sharp, aching chest pain which increases with breathing. Which anatomic area would you localize the symptom to?
- A. Musculoskeletal
- B. Reproductive
- C. Urinary
- D. Endocrine
Correct Answer: A
Rationale: The symptom described - sharp, aching chest pain that increases with breathing - is typically associated with musculoskeletal issues. The pain worsening with breathing suggests a connection to the movements of the chest wall, which could involve the muscles, bones, or joints in that area. Conditions such as costochondritis (inflammation of the cartilage that connects a rib to the breastbone) or muscle strains in the chest wall are common causes of chest pain that worsens with breathing. This localization to the musculoskeletal system is based on the characteristics of the pain and how it is affected by breathing, helping to narrow down the differential diagnosis.
It started a few hours ago, and she has noted nausea with sensitivity to light; she has had headaches like this in the past, usually less than one per week, but not as severe. She does not know of any inciting factors. There has been no change in the frequency of her headaches. She usually takes an over- the-counter analgesic, and this results in resolution of the headache. Based on this description, what is the most likely diagnosis of the type of headache?
- A. Tension
- B. Migraine
- C. Cluster
- D. Analgesic rebound
Correct Answer: B
Rationale: The description of the headache as starting a few hours ago, associated with nausea, sensitivity to light, and being severe in intensity suggests a migraine headache. Migraine headaches are often accompanied by these symptoms, known as migraine features. The fact that the patient experiences headaches like this less than once a week and typically uses over-the-counter analgesics to relieve them is also suggestive of migraines. Tension headaches typically present as a more mild to moderate, band-like pressure around the head, without the associated symptoms of nausea and sensitivity to light. Cluster headaches are characterized by excruciating pain around one eye, often accompanied by other symptoms like redness or tearing in the eye. Analgesic rebound headaches occur due to overuse of pain medications and typically present as daily headaches that improve with the same medication that caused them in the first place.
You ask a patient to draw a clock. He fills in all the numbers on the right half of the circle. What do you suspect?
- A. Hemianopsia
- B. Fatigue
- C. Oppositional defiant disorder
- D. Depression
Correct Answer: A
Rationale: Filling in all the numbers on just one side of the clock when asked to draw a clock suggests a visual field deficit, typically seen in hemianopsia. Hemianopsia is a visual impairment where half of the visual field is lost due to neurological damage or injury, such as a stroke. This causes the individual to have difficulty perceiving or attending to objects in the affected visual field. In this case, the patient's right visual field may be affected, leading to the specific pattern of filling numbers on the right half of the clock. It is essential to further assess and refer the patient for a complete visual field evaluation and neurological examination.