Nokea
You are assigned to evaluate the outcome of fecal occult blood test as a screening test for patients with bowel cancer. The total number of patients who underwent the test is 2030; in those whom the disease is confirmed are 30. The results of fecal occult blood test are as follows: in 20 patients who has a confirmed bowel cancer (truly positive), and in 180 patients who don't have the disease (falsely positive); in 10 patients who truly has the disease (falsely negative), and in 1820 patients who are not affected by the disease (truly negative). All the following statements are true EXCEPT
- A. the prevalence of the disease for those population is 1.48%
- B. the sensitivity of the test is 67%
- C. the specificity of the test is 91%
- D. the positive predictive value is 20%
Correct Answer: A
Rationale: Prevalence = (Total cases / Total population) * 100 = (30 / 2030) * 100 ≈ 1.48%. This statement is correct, so it is the exception as the question asks for the incorrect statement.
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A 10 years old girl presented with fever and bruises for last 2 weeks. On examination she is pale; however there is no evidence of lymphadenopathy or hepatosplenomegaly. Her Hb is 6g/dl, TLC is 2700 and platelets are 90000. The most appropriate investigation to clinch the diagnosis is:
- A. Bone marrow aspiration
- B. Retics count
- C. Bleeding time
- D. PT and APTT
Correct Answer: A
Rationale: Bone marrow aspiration is essential to rule out conditions like aplastic anemia or leukemia, which could explain the symptoms and lab findings.
Which is true of a Wilms tumor? (Select all that apply.)
- A. It is also referred to as neuroblastoma.
- B. It is most commonly seen between the ages of 2 and 5 years.
- C. It can occur on its own or be associated with congenital anomalies.
- D. It is a slow-growing tumor.
Correct Answer: C
Rationale: Wilms tumor typically occurs in children aged 2-5 years and may be associated with congenital anomalies. It is not the same as neuroblastoma, and its prognosis is generally good with treatment.
Before administering a food feeding the nurse knows to perform which of the following assessments/
- A. The GI tract, including bowel sounds, last BM, and distention f. The client's neurologic status, especially the gag reflex
- B. The amount of air in the stomach
- C. That the formula is used directly from the refrigerator
Correct Answer: A
Rationale: Before administering a food feeding, the nurse knows to perform assessments related to the GI tract, including bowel sounds, last bowel movement, and distention. These assessments help evaluate the patient's digestive system function and readiness for food intake. In addition, assessing the client's neurologic status, especially the gag reflex, is crucial before initiating feeding to prevent aspiration and ensure safe swallowing. These assessments help ensure the safety and well-being of the patient during the feeding process. Checking the amount of air in the stomach and ensuring that the formula is used directly from the refrigerator are not primary assessments that need to be performed before administering a food feeding.
Justine is admitted to the pediatric unit due to the occurrence of diabetic ketoacidosis signaling a new diagnosis of diabetes. The diabetes team explores the cause of the episode and take steps to prevent a recurrence. Diabetic ketoacidosis (DKA) results from an excessive accumulation of which of the following?
- A. Sodium bicarbonate from renal compensation
- B. Potassium from cell death
- C. Glucose from carbohydrate metabolism
- D. Ketone bodies from fat metabolism
Correct Answer: D
Rationale: Diabetic ketoacidosis (DKA) is a serious complication of diabetes that occurs when there is not enough insulin in the body. In the absence of sufficient insulin, the body is unable to use glucose for energy, leading to the breakdown of fats for fuel. This results in the excessive production of ketone bodies, specifically acetoacetate and beta-hydroxybutyrate. As the ketone bodies accumulate in the blood, they lower the blood pH, leading to acidosis. This is what causes the characteristic symptoms of DKA, such as fruity breath, deep rapid breathing, and abdominal pain. Therefore, the excessive accumulation of ketone bodies from fat metabolism is the primary cause of diabetic ketoacidosis.
An insulin-dependent diabetic delivered a 10-pound male. When the baby is brought to the nursery, the priority of care is to
- A. clean the umbilical cord with Betadine to prevent infection
- B. give the baby a bath
- C. call the laboratory to collect a PKU screening test
- D. check the baby's serum glucose level and administer glucose if < 40 mg/dL
Correct Answer: D
Rationale: The priority of care when a baby born to an insulin-dependent diabetic mother is brought to the nursery is to check the baby's serum glucose level and administer glucose if it is less than 40 mg/dL. Babies born to diabetic mothers, especially those with poorly controlled blood sugar levels, are at risk for hypoglycemia (low blood sugar) due to the sudden drop in glucose supply after delivery. Hypoglycemia can be dangerous for newborns and can lead to serious complications if left untreated. Therefore, monitoring the baby's serum glucose levels and providing appropriate intervention, such as administering glucose if necessary, is critical to ensure the baby's well-being.