the sinoatrial node sa is located within which of the following heart structures
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Nursing Elites

NCLEX-RN

NCLEX RN Predictor Exam

1. The Sinoatrial Node (SA) is located within which of the following heart structures?

Correct answer: C

Rationale: The Sinoatrial (SA) Node, often called the heart's natural pacemaker, is situated within the upper wall of the Right Atrium. It initiates the electrical impulses that regulate the heartbeat. Choices A, B, and D are incorrect because the SA node is not located in the Mitral Valve, Right Ventricle, or Left Atrium. It is specifically positioned in the Right Atrium to coordinate the heart's rhythm and timing.

2. During auscultation of a patient's heart sounds, the nurse hears an unfamiliar sound. Which action would the nurse take?

Correct answer: D

Rationale: When encountering an unfamiliar sound during auscultation, it is crucial for the nurse to seek confirmation from another healthcare professional. Asking the patient about their feelings may not provide insight into the unfamiliar sound. Simply documenting the findings without verification may lead to errors in interpretation. Waiting and auscultating again after 10 minutes might delay necessary intervention. Consulting another nurse for a second opinion ensures accurate identification of the unfamiliar sound and appropriate follow-up actions.

3. A newly admitted patient with major depression has lost 20 pounds over the past month and has suicidal ideation. The patient has taken an antidepressant medication for 1 week without remission of symptoms. Select the priority nursing diagnosis.

Correct answer: B

Rationale: The priority nursing diagnosis in this scenario is 'Risk for suicide.' When a patient presents with major depression, significant weight loss, suicidal ideation, and lack of symptom improvement despite medication, the immediate concern is to address the risk of suicide. 'Risk for suicide' takes precedence as it involves a direct threat to the patient's life. 'Imbalanced nutrition: Less than body requirements' may be a concern but does not take priority over the risk of suicide. 'Chronic low self-esteem' and 'Hopelessness' are relevant issues in depression but are not as urgent as addressing the immediate risk of suicidal behavior.

4. After receiving change-of-shift report, which patient should the nurse assess first?

Correct answer: B

Rationale: The correct answer is the patient with possible lung cancer who has just returned after bronchoscopy. After bronchoscopy, the patient may have decreased cough and gag reflexes, necessitating immediate assessment for airway patency to prevent potential complications. The other patients do not exhibit urgent clinical manifestations or have undergone recent procedures that require immediate attention. Therefore, they can be assessed after ensuring the safety and stability of the patient who has just returned after bronchoscopy.

5. The nurse is caring for a patient who has a right-sided chest tube after a right lower lobectomy. Which nursing action can the nurse delegate to the unlicensed assistive personnel (UAP)?

Correct answer: A

Rationale: The correct answer is to document the amount of drainage every eight hours. UAP education typically includes tasks related to documentation of intake and output. Obtaining samples of drainage for culture and assessing patient pain level are nursing responsibilities that require licensed nursing personnel's education and scope of practice. Checking the water-seal chamber for the correct fluid level also falls under the nursing role, as it involves monitoring and maintaining the chest tube system, which requires nursing knowledge and training.

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