Nokea
What is the critical point for PO2 (the 'ICU' point), the percentage point at which there is marked decrease in oxygen saturation? Record your answer using a whole number.
Correct Answer: 90
Rationale: The critical PO2 point is around 90 mmHg, where oxygen saturation drops significantly, often requiring ICU intervention.
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A child with achondroplasia will likely have which of the following physical characteristics?
- A. alopecia, failure to thrive, small face, recessed jaw
- B. enlarged hands and feet, skull expansion at fontanelle, enlarged tongue
- C. poor muscle tone, slanted eyes, single palmar crease
- D. dwarf stature, short fingers and toes, short proximal limbs
Correct Answer: D
Rationale: Achondroplasia causes dwarfism, short fingers/toes, and short proximal limbs due to impaired cartilage growth.
The physician has ordered cultures for cytomegalovirus (CMV). Which statement is true of the collection of cultures for cytomegalovirus?
- A. Stool cultures are preferred for definitive diagnosis.
- B. Pregnant caregivers may obtain cultures.
- C. Collection of one specimen is sufficient.
- D. Accurate diagnosis depends on fresh specimens.
Correct Answer: D
Rationale: Fresh specimens are critical for accurate CMV culture results, as the virus is labile and degrades quickly.
The physician has ordered sublingual nitroglycerin for a client. Which of the following are contraindications for administration of sublingual or buccal medications? Select all that apply.
- A. Client is edentulous.
- B. Client has mild dementia.
- C. Mucous membranes are red and irritated.
- D. Client is dehydrated.
- E. Client has productive aphasia.
Correct Answer: C,D
Rationale: Red, irritated mucous membranes (C) and dehydration (D) impair sublingual absorption. Edentulous state (A), mild dementia (B), and aphasia (E) do not contraindicate sublingual administration.
A client confides in the nurse that a close friend recently died from pancreatic cancer. The client asks what the risk factors are for pancreatic cancer. The nurse should respond with
- A. Being a female of Asian descent is linked to an increased risk of pancreatic cancer.'
- B. Drinking two or fewer alcoholic beverages per week is linked to an increased risk of pancreatic cancer.'
- C. Past history of acute pancreatitis before age 20 is linked to an increased risk of pancreatic cancer.'
- D. Cigarette smoking is linked to an increased risk for pancreatic cancer.'
Correct Answer: D
Rationale: Cigarette smoking is a well-established risk factor for pancreatic cancer, increasing risk through carcinogenic exposure.
The nurse administers 6 units of Humalog (lispro) insulin sub-q to a client at 8:30 a.m. The nurse knows to reassess the client and check for a possible hypoglycemic reaction at
- A. 8:45 a.m.
- B. 9:30 a.m.
- C. 11:30 a.m.
- D. 12:00 p.m.
Correct Answer: B
Rationale: Humalog (lispro) is rapid-acting insulin with a peak effect at 1-2 hours. Checking at 9:30 a.m. (1 hour post-administration) aligns with the onset of action to monitor for hypoglycemia.