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NCLEX RN Exam Prep
1. What does preload refer to?
- A. The volume of blood entering the left side of the heart
- B. The volume of blood entering the right side of the heart
- C. The pressure in the venous system that the heart must overcome to pump the blood
- D. The pressure in the arterial system that the heart must overcome to pump the blood
Correct answer: B: The volume of blood entering the right side of the heart
Rationale: Preload refers to the volume of blood that enters the right side of the heart. This volume stretches the fibers in the heart before contraction. Preload is an essential factor in determining the force of ventricular contraction. Choices A, C, and D are incorrect. Choice A is incorrect because preload is specifically related to the volume of blood entering the right side of the heart. Choices C and D are incorrect as they refer to afterload, which is the pressure that the heart must overcome to pump blood out of the ventricles into the systemic or pulmonary circulation.
2. A child is diagnosed with Hirschsprung's disease. The nurse is teaching the parents about the cause of the disease. Which statement, if made by the parent, supports that teaching was successful?
- A. The absence of special cells in the rectum caused the disease.
- B. Incomplete digestion of the protein part of wheat, barley, rye, and oats is not the cause of the disease.
- C. The disease does not occur due to increased bowel motility leading to spasm and pain.
- D. The disease is not caused by the inability to tolerate sugar found in dairy products.
Correct answer: The absence of special cells in the rectum caused the disease.
Rationale: Hirschsprung's disease, also known as congenital aganglionosis or megacolon, is characterized by the absence of ganglion cells in the rectum and, sometimes, extending into the colon. Choice A correctly explains the cause of Hirschsprung's disease. Choice B is incorrect as it describes celiac disease, which is related to gluten intolerance. Choice C is inaccurate as it describes symptoms of irritable bowel syndrome, not the cause of Hirschsprung's disease. Choice D is wrong as it pertains to lactose intolerance, not Hirschsprung's disease.
3. When the health care provider diagnoses metastatic cancer and recommends a gastrostomy for an older female client in stable condition, the son tells the nurse that his mother must not be told the reason for the surgery because she 'can't handle' the cancer diagnosis. Which legal principle is the court most likely to uphold regarding this client's right to informed consent?
- A. The family cannot provide the consent required in this situation as the older adult is capable of making decisions.
- B. The son cannot waive informed consent for the client since there is no evidence of mental incompetence.
- C. The court will not allow the health care provider to make the decision to withhold informed consent under therapeutic privilege.
- D. If informed consent is withheld from a client, health care providers could be found guilty of negligence.
Correct answer: If informed consent is withheld from a client, health care providers could be found guilty of negligence.
Rationale: Health care providers may be found guilty of negligence, specifically assault and battery, if they carry out a treatment without the client's consent. The client's condition is stable, so the family cannot provide consent without her involvement, making option A incorrect. There is no evidence of mental incompetence in the client, so the son cannot waive informed consent, making option B incorrect. While therapeutic privilege may have been accepted in the past, it is unlikely to be upheld by today's courts, making option C incorrect. It is crucial for health care providers to obtain informed consent from clients before proceeding with any treatment to avoid legal consequences and uphold ethical standards.
4. A 3-year-old pediatric patient's mother would like to stay at the patient's bedside throughout the night as the patient seems calmer when she is present. What is the most caring and appropriate response?
- A. Reinforce visiting hours
- B. Allow her to stay for a short period beyond normal hours
- C. Allow her to stay throughout the night
- D. Offer to get bedding for a couch in the waiting room
Correct answer: Allow her to stay throughout the night
Rationale: Allowing the mother to stay throughout the night is the most caring and appropriate response in this situation. Pediatric facilities often recognize the crucial role parents play in their child's care and are supportive of unlimited visitation. Allowing the mother to stay can help maintain the child's calmness and enhance the bond between the family and healthcare team. Reinforcing visiting hours (Choice A) may not address the specific needs of this situation where the child benefits from the mother's presence. Allowing her to stay for a short period beyond normal hours (Choice B) may not fully address the need for her continuous presence. Offering to get bedding for a couch in the waiting room (Choice D) may not be necessary if the mother can stay with her child in the patient's room.
5. A 70-year-old man has a blood pressure of 150/90 mm Hg in a lying position, 130/80 mm Hg in a sitting position, and 100/60 mm Hg in a standing position. How should the nurse evaluate these findings?
- A. These readings are a normal response and attributable to changes in the patient’s position.
- B. The change in blood pressure readings is called orthostatic hypotension.
- C. The blood pressure reading in the lying position is within normal limits.
- D. The change in blood pressure readings is considered within normal limits for the patient’s age.
Correct answer: The change in blood pressure readings is called orthostatic hypotension.
Rationale: The correct answer is, 'The change in blood pressure readings is called orthostatic hypotension.' Orthostatic hypotension is defined as a drop in systolic pressure of ³20 mm Hg or ³10 mm Hg drop in diastolic pressure that occurs with a quick change to a standing position. This condition is common in individuals on prolonged bed rest, older adults, those with hypovolemia, or taking specific medications. The blood pressure readings provided in the question (150/90 mm Hg lying, 130/80 mm Hg sitting, and 100/60 mm Hg standing) demonstrate a significant change in blood pressure with position changes, which is indicative of orthostatic hypotension. Choices A, C, and D are incorrect because the readings do not indicate a normal response or blood pressure within normal limits for the patient’s age; rather, they suggest the presence of orthostatic hypotension.
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