what is the primary role of the sinoatrial sa node in the heart
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Nursing Elites

HESI LPN

HESI PN Exit Exam

1. What is the primary role of the sinoatrial (SA) node in the heart?

Correct answer: A

Rationale: The correct answer is A: Pacemaker of the heart. The SA node, known as the natural pacemaker, initiates the electrical impulses that set the rhythm for the heartbeat. It is responsible for coordinating the heart's contractions by generating electrical signals at regular intervals. Choice B is incorrect as the SA node's primary function is not related to blood pressure regulation. Choice C is incorrect as the SA node does not cause electrical conduction delay but rather initiates and conducts the electrical impulses. Choice D is incorrect as the SA node does not directly stimulate muscle contraction but rather initiates the electrical events that lead to muscle contraction.

2. A client is complaining of a tingling sensation in the fingers, nose tip, and earlobes 24 hours after a total thyroidectomy. Which measure should the PN implement first?

Correct answer: C

Rationale: The correct answer is C: Obtain prescribed calcium gluconate for tetany. Tingling sensations post-thyroidectomy may indicate hypocalcemia, a potential complication that requires prompt treatment with calcium gluconate to prevent tetany. Initiating L-thyroxine replacement therapy (choice B) is important but not the first priority in this situation. Applying sequential compression devices (choice A) is not indicated for tingling sensations and does not address the potential complication of hypocalcemia. Preparing for an emergency tracheotomy (choice D) is not warranted based on the client's symptoms of tingling sensations.

3. In which stage of Maslow's hierarchy of needs is a young adult attempting to achieve when deciding to change his work hours to devote more time to his community?

Correct answer: A

Rationale: The correct answer is A: Self-Actualization. The young adult is striving for self-actualization, the highest level in Maslow's hierarchy of needs. Self-actualization is characterized by individuals seeking personal growth, self-fulfillment, and the ability to contribute to society. Choice B, Intimacy vs. Isolation, focuses on relationships and occurs at a different stage. Choice C, Altruism, although related to community contribution, does not specifically address personal growth and fulfillment as in self-actualization. Choice D, Purposefulness, is not a stage in Maslow's hierarchy of needs and is not directly relevant to the scenario described.

4. When documenting information in a client's medical record, what should the nurse do?

Correct answer: D

Rationale: When documenting information in a client's medical record, the nurse should end each entry with their signature and title. This practice is crucial for legal and professional standards compliance as it ensures that the documentation is attributable to the responsible individual. Choices A, B, and C are incorrect because while crossing out errors, using a black ink pen, and leaving a blank line before each entry are good practices, they are not as critical as ensuring each entry is signed and titled by the nurse for accountability and traceability.

5. When teaching a patient with diabetes about foot care, which of the following should the nurse emphasize?

Correct answer: C

Rationale: The correct answer is C. Trimming toenails straight across and filing the edges is crucial in diabetic foot care to prevent ingrown toenails and foot injuries. Soaking feet daily can lead to dryness and skin breakdown, increasing the risk of infection. Selecting well-fitting shoes is important to prevent pressure points and skin damage, not tight-fitting shoes. Using heating pads can result in burns or injuries due to decreased sensation in diabetic feet, so it's essential to avoid them.

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