HESI LPN
HESI PN Exit Exam
1. What is the primary function of surfactant in the lungs?
- A. Reduce surface tension
- B. Enhance oxygen absorption
- C. Facilitate carbon dioxide release
- D. Increase lung volume
Correct answer: A
Rationale: The primary function of surfactant in the lungs is to reduce surface tension in the alveoli. This reduction in surface tension prevents lung collapse and allows for easier breathing. It is particularly crucial in premature infants to help with lung expansion. Choice B is incorrect because surfactant primarily affects surface tension, not oxygen absorption. Choice C is incorrect because surfactant's main role is not in facilitating carbon dioxide release. Choice D is incorrect because surfactant does not directly increase lung volume; its main role is in reducing surface tension.
2. When teaching a patient about the side effects of a new medication, which teaching method is most effective?
- A. Providing a written pamphlet
- B. Giving verbal instructions only
- C. Demonstrating how to take the medication
- D. Using a combination of verbal, written, and demonstration methods
Correct answer: D
Rationale: The most effective teaching method when educating a patient about the side effects of a new medication is to use a combination of verbal, written, and demonstration methods. This comprehensive approach ensures that the patient receives information through multiple channels, catering to different learning styles. Verbal instructions allow for direct communication, written materials provide a reference for the patient to review later, and demonstrations offer a visual aid that can enhance understanding. Providing a combination of these methods increases the likelihood of the patient retaining and comprehending the information effectively. Choices A, B, and C are less effective as they do not encompass the benefits of utilizing multiple teaching modalities.
3. A nurse who receives a patient in the operative suite prior to the actual surgery is in charge of the patient’s care. Which of the following is NOT a task related to the nurse’s intraoperative care?
- A. Go over the surgical procedure with the patient before he or she is anesthetized
- B. Strictly adhere to asepsis during all intraoperative procedures
- C. Provide emotional support to the patient and their family
- D. Monitor the patient’s physical status
Correct answer: A
Rationale: The correct answer is A. Going over the surgical procedure with the patient is typically done preoperatively, not intraoperatively. Intraoperative tasks of a nurse involve strictly adhering to asepsis during procedures, monitoring the patient's physical status, and providing emotional support to the patient and their family during the surgery. Choices B, C, and D are all tasks that are directly related to the nurse's responsibilities during the intraoperative phase of care.
4. Which condition is characterized by a progressive loss of muscle strength due to an autoimmune attack on acetylcholine receptors?
- A. Myasthenia gravis
- B. Multiple sclerosis
- C. Amyotrophic lateral sclerosis
- D. Guillain-Barré syndrome
Correct answer: A
Rationale: The correct answer is A: Myasthenia gravis. Myasthenia gravis is characterized by muscle weakness caused by autoimmune attack on acetylcholine receptors at the neuromuscular junction. This results in impaired communication between nerves and muscles. Choice B, Multiple sclerosis, is a condition where the immune system attacks the protective myelin sheath covering the nerves in the central nervous system, leading to communication issues between the brain and the rest of the body. Choice C, Amyotrophic lateral sclerosis, is a progressive neurodegenerative disease affecting motor neurons in the brain and spinal cord, not involving acetylcholine receptors. Choice D, Guillain-Barré syndrome, is an acute condition where the immune system attacks the peripheral nerves, causing muscle weakness and paralysis, but it does not target acetylcholine receptors.
5. The nurse and UAP enter a client's room and find the client lying on the bed. The nurse determines that the client is unresponsive. Which instruction should the nurse give the UAP first?
- A. Obtain emergency help
- B. Feel for a carotid pulse
- C. Bring a glucometer to the room
- D. Check the blood pressure
Correct answer: A
Rationale: The correct answer is to instruct the UAP to obtain emergency help first. In a situation where a client is unresponsive, the priority is to ensure that help is summoned promptly. This allows for the availability of necessary resources and assistance for resuscitation or other emergency interventions. Feeling for a carotid pulse or checking the blood pressure can be important assessments but are secondary to obtaining immediate help. Bringing a glucometer to the room, while relevant in certain situations, is not the priority when the client's unresponsiveness indicates a need for urgent intervention.
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