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. The nurse is caring for an elderly female client who tells the nurse, 'When I sneeze, I wet my pants.' After discussing the client's complaint with the charge nurse, the nurse plans to reinforce teaching about the importance of Kegel exercises. What muscles are involved in these exercises?
- A. Pectoral muscles
- B. Buttock muscles
- C. Abdominal muscles
- D. Pelvic floor muscles
Correct answer: D
Rationale: Kegel exercises involve the pelvic floor muscles. These muscles help strengthen the muscles controlling urination, potentially reducing symptoms of urinary incontinence. Pectoral muscles (Choice A), responsible for movement of the shoulders and arms, are not involved in Kegel exercises. Buttock muscles (Choice B) are primarily responsible for hip movement and stability, not related to Kegel exercises. Abdominal muscles (Choice C) support the core and trunk but are not the focus of Kegel exercises.
3. In what order should the PN implement these steps to provide wound care? (Place in correct order.)
- A. Don procedure gloves
- B. Remove the dressing
- C. Apply prescribed medications to the wound
- D. All of the Above
Correct answer: D
Rationale: The correct answer is 'D - All of the Above.' The PN should first don procedure gloves to maintain aseptic technique, then remove the dressing to assess the wound, and finally apply prescribed medications to the wound. This sequence ensures that non-sterile tasks like donning gloves are done before sterile tasks like applying medications, reducing the risk of wound contamination. Choices A, B, and C are all essential steps in providing effective wound care.
4. The PN notes that an older female client has developed a nonproductive cough and seems more confused than the previous day. Vital signs are temperature 99.8°F, pulse 94, respirations 22, and B/P 108/54. Which intervention is most important for the PN to implement?
- A. Report the findings to the charge nurse
- B. Monitor the client's temperature hourly
- C. Offer the client fluids frequently
- D. Provide care to moisten oral mucosa
Correct answer: A
Rationale: The change in the client’s condition, especially confusion and a new cough, may indicate the onset of an infection such as pneumonia, which requires immediate attention. Reporting to the charge nurse ensures prompt evaluation and intervention. Monitoring the client's temperature hourly (Choice B) could be important but not the most critical at this point. Offering the client fluids frequently (Choice C) and providing care to moisten oral mucosa (Choice D) are not the priority interventions when facing potential signs of infection and confusion in the client.
5. A client is admitted to the postoperative surgical unit with two test tubes after a left lobectomy. The nurse observed that the chambers are set at the prescribed suction of 20 cm water pressure, and tidying occurs with respirations and bubbling. What action should the nurse implement?
- A. Clamp the chest tube to see if the bubbling activity stops
- B. Notify the registered nurse of the observed bubbling
- C. Maintain system integrity to promote lung reexpansion
- D. Apply an occlusive dressing to the chest
Correct answer: C
Rationale: Maintaining system integrity is essential to promote lung reexpansion in postoperative patients with chest tubes. Clamping the chest tube abruptly can lead to tension pneumothorax, a life-threatening condition. The bubbling observed is a normal sign indicating that the system is functioning correctly, as it allows the drainage of air or fluid from the pleural space. Notifying the registered nurse may be necessary if there are significant concerns or changes observed, but the immediate action should be to ensure system integrity and lung reexpansion.
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