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Following mitral valve replacement surgery, a client develops PVCs. The healthcare provider orders a bolus of Lidocaine followed by a continuous Lidocaine infusion at a rate of 2 mg/minute. The IV solution contains 2 grams of Lidocaine in 500 mL of D5W. The infusion pump delivers 60 microdrops/mL. What rate would deliver 4 mg of Lidocaine per minute?
- A. 60 microdrops/minute
- B. 20 microdrops/minute
- C. 30 microdrops/minute
- D. 40 microdrops/minute
Correct Answer: A
Rationale: To calculate the rate needed to deliver 4 mg/minute of Lidocaine, first, convert 2 grams to milligrams: 2 grams = 2000 mg. Then, set up a ratio between the total amount of Lidocaine (2000 mg) and the total volume of IV solution (500 mL): 2000 mg / 500 mL = 4 mg / x mL. Solving for x, x = 1 mL. Since the infusion pump delivers 60 microdrops per mL, multiplying by 60 microdrops/mL gives the correct rate of 60 microdrops/minute. This rate ensures the desired 4 mg of Lidocaine is delivered per minute. Choices B, C, and D are incorrect as they do not align with the accurate calculation based on the provided information.
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A victim of domestic violence states, 'If I were better, I would not have been beaten.' Which feeling best describes what the victim may be experiencing?
- A. Fear
- B. Helplessness
- C. Self-blame
- D. Rejection
Correct Answer: C
Rationale: The correct answer is self-blame. In this scenario, the victim is attributing the abuse to their own inadequacies or faults, thinking that if they were different, the abuse would not occur. This is a common response seen in victims of domestic violence, where they wrongly internalize the blame for the abuser's actions. Fear (Choice A) is a valid emotion, but in this case, the victim is not expressing fear but rather self-blame. Helplessness (Choice B) is also a common feeling in victims of domestic violence, but in this specific statement, the victim is demonstrating self-blame. Rejection (Choice D) does not accurately reflect the victim's statement and emotional response in the given scenario.
Which oxygen delivery system would provide the highest concentrations of oxygen to the client?
- A. Venturi mask
- B. Partial rebreather mask
- C. Non-rebreather mask
- D. Simple face mask
Correct Answer: C
Rationale: The correct answer is the non-rebreather mask. This oxygen delivery system has a one-way valve that prevents exhaled air from entering the reservoir bag and one or more valves covering the air holes on the face mask itself to prevent the inhalation of room air but allow exhalation of air. When a tight seal is achieved around the mask, up to 100% of oxygen is available.
Choice A, the Venturi mask, delivers precise oxygen concentrations but not as high as the non-rebreather mask. Choice B, the partial rebreather mask, allows the client to rebreathe some exhaled air, resulting in lower oxygen concentrations than the non-rebreather mask. Choice D, the simple face mask, delivers low to moderate oxygen concentrations and is not designed to provide the highest concentrations like the non-rebreather mask.
A patient presents to the office with a pencil that has completely penetrated the palm of her hand. Which of the following treatments would be BEST in this situation?
- A. Assist the doctor while he sedates the patient and removes the pencil from her hand.
- B. Have the patient gently pull the pencil out of her hand and assist the physician with stitches.
- C. Wrap a gauze around the pencil, securing it as much as possible until the patient can get to a local emergency room.
- D. Tell the patient to go to the local emergency room. With a doctor's order, give the patient some aspirin for the pain.
Correct Answer: C
Rationale: Penetrating wounds that leave an object behind may have damaged important blood vessels. Removing the object may lead to significant bleeding. The correct approach is to gently wrap the wound with the object in place to help control bleeding and prevent further injury. The patient should be taken promptly to the nearest emergency room where healthcare professionals can safely and appropriately remove the object and provide necessary treatment. Choice A is incorrect because removing the pencil without proper medical evaluation can worsen the injury. Choice B is incorrect because pulling out the object can cause additional damage and bleeding. Choice D is incorrect because giving aspirin without knowing the extent of the injury and causing potential drug interactions can be harmful.
Why are subdural hemorrhages more common in the elderly?
- A. Increased anticoagulant use
- B. Increased risk of falls
- C. Brain atrophy
- D. Inconsistent care giving
Correct Answer: C
Rationale: Subdural hemorrhages are more common in the elderly due to cerebral atrophy resulting from the natural aging process. This atrophy can lead to the stretching of bridging veins, making them more fragile and prone to tearing even with minor trauma. While increased anticoagulant use and a higher risk of falls are common in the elderly, brain atrophy plays a more direct role in the increased incidence of subdural hemorrhages. Inconsistent caregiving, on the other hand, is not a direct cause of subdural hemorrhages but may impact the overall management and outcome of such cases.
The healthcare provider is caring for a 20 lbs (9 kg) 6-month-old with a 3-day history of diarrhea, occasional vomiting, and fever. Peripheral intravenous therapy has been initiated, with 5% dextrose in 0.33% normal saline with 20 mEq of potassium per liter infusing at 35 ml/hr. Which finding should be reported to the healthcare provider immediately?
- A. 3 episodes of vomiting in 1 hour
- B. Periodic crying and irritability
- C. Vigorous sucking on a pacifier
- D. No measurable voiding in 4 hours
Correct Answer: D
Rationale: The correct answer is 'No measurable voiding in 4 hours.' This finding should be reported to the healthcare provider immediately. The concern is the possibility of hyperkalemia, which could occur with continued potassium administration and a decrease in urinary output since potassium is excreted via the kidneys. It is crucial to monitor urinary output in pediatric patients receiving potassium-containing IV solutions to prevent electrolyte imbalances and potential complications.
Choices A, B, and C are not the most critical findings that require immediate reporting. '3 episodes of vomiting in 1 hour' may suggest a need for antiemetic therapy or further assessment of the underlying cause but does not pose an immediate risk like the potential electrolyte imbalance from decreased urinary output. 'Periodic crying and irritability' and 'Vigorous sucking on a pacifier' are common behaviors in infants and are not indicative of a critical condition that requires urgent attention in this scenario.