LPN exams fundamentals practice questions set 41

Correct answer:

Reducing inhalation exposure to toxic substances in the workplace hinges on effective personal protective equipment (PPE), such as respirators, hoods, or masks designed for specific hazards, as stated in option B. This approach directly blocks inhalation of airborne toxins, aligning with occupational safety standards like OSHA guidelines. Positioning a fan to blow on toxins disperses them, increasing exposure risk, not reducing it. Immunizations protect against infectious diseases, not chemical toxins, making them irrelevant here. A disposable paper mask offers minimal protection against inhalable toxins compared to fitted respirators, which filter specific particle sizes or vapors. The nurse's advice to wear appropriate protective attire and devices empowers the employee to minimize lung damage, such as pneumoconiosis, by creating a physical barrier, the most effective primary prevention strategy in this context.

Correct answer:

The correct sequence of the electrical stimulus in the cardiac cycle is SA node → AV node → bundle of His → bundle branches. The rationale is as follows: 1. The SA node initiates the electrical impulse in the heart. 2. The impulse travels to the AV node, which serves as a delay mechanism to ensure proper coordination of atrial and ventricular contractions. 3. From the AV node, the impulse then travels to the bundle of His, which conducts the impulse to the bundle branches. 4. Finally, the impulse is transmitted through the bundle branches to the Purkinje fibers, which then distribute the impulse throughout the ventricles for coordinated contraction. Therefore, choice C is correct as it accurately represents the sequential pathway of the electrical stimulus in the cardiac cycle. Choices A, B, and D are incorrect as they do not follow the physiologically accurate sequence of the cardiac conduction system.

Correct answer:

Teaching about Azmacort (triamcinolone), an inhaled corticosteroid for asthma, must address cough and oral thrush as key adverse effects. Cough can occur from airway irritation by the inhalant, a local reaction manageable with technique adjustment (e.g., spacer use). Oral thrush (candidiasis) results from steroid deposition in the mouth, suppressing local immunity rinsing after use prevents this fungal overgrowth. Dyspnea and increased secretions aren't typical; corticosteroids reduce secretions long-term. Nausea and vomiting are systemic effects, rare with inhaled forms unless overdosed. Fatigue and decreased consciousness suggest severe systemic absorption (e.g., adrenal suppression), uncommon at standard doses. The nurse's focus on these effects demonstrating rinsing and monitoring for white patches ensures safe use, aligning with asthma pharmacotherapy education to maintain efficacy and minimize complications.

Correct answer:

The correct answer is A: When the bronchial tree is obstructed. Decreased breath sounds are expected in situations where airflow is obstructed, leading to diminished sound transmission. When there is an obstruction in the bronchial tree, such as in asthma or bronchitis, breath sounds become decreased due to the restricted airflow. The other choices are incorrect because: B: When adventitious sounds are present - Adventitious sounds like crackles or wheezes indicate abnormal lung sounds but do not necessarily result in decreased breath sounds. C: In conjunction with whispered pectoriloquy - Whispered pectoriloquy is a finding where whispering is heard clearly through the stethoscope, indicating lung consolidation rather than decreased breath sounds. D: In conditions of consolidation, such as pneumonia - Consolidation leads to increased breath sounds due to the denser lung tissue, not decreased breath sounds.

Correct answer:

Muscle contraction and relaxation drive movement through a coordinated process. Contraction occurs when nerve impulses trigger calcium release, enabling myosin heads to bind actin and pull filaments together, shortening the muscle and moving attached structures, like bones in skeletal muscle. Relaxation follows when calcium is pumped back into the sarcoplasmic reticulum, halting myosin-actin interaction, allowing the muscle to lengthen and rest. The incomplete option likely misrepresents a molecular detail (e.g., 'Xn' for ions or proteins), but lacks clarity. Cell layer thickness affects force, not the process itself. Vessel linings support circulation, not contraction mechanics. The contraction-relaxation cycle, powered by ATP and regulated by calcium, is the correct mechanism, universally applicable to skeletal, cardiac, and smooth muscle functions, making it the accurate statement despite the truncated option.

Correct answer:

When a client with major fecal incontinence reports irritation in the perianal area, the nurse's initial action should be to assess the client's perineum to gather more information. By checking the perineum, the nurse can identify the extent and nature of the irritation, allowing for appropriate interventions to be initiated. This assessment is crucial in developing a comprehensive care plan and addressing the client's immediate needs effectively. Applying the nursing process priority-setting framework helps in planning care and prioritizing nursing actions, making assessment the initial step in this scenario. Applying a fecal collection system (choice A) would be premature without assessing the perineal area first. Similarly, applying a barrier cream (choice B) or cleansing and drying the area (choice C) should follow the assessment to ensure appropriate interventions are chosen based on the assessment findings.

Correct answer:

When assigned to float to an unfamiliar unit like the ICU, the nurse must balance patient safety with professional responsibility. Reporting to the ICU and identifying tasks that can be safely performed is the most appropriate action, as it ensures the nurse contributes within their competence while seeking support for unfamiliar tasks. Calling the nursing supervisor may be a follow-up step if issues arise, but it delays immediate action. Calling the hospital lawyer is excessive and irrelevant to the situation, as no legal violation has occurred. Refusing to float may breach hospital policy and abandon patient care needs, unless the nurse's incompetence poses an immediate risk. By reporting and clarifying their skill set, the nurse adheres to ethical standards, protects patient safety, and collaborates with the ICU team to manage care effectively, aligning with the principle of 'do no harm' while fulfilling duty.

Correct answer:

The correct answer is D: Prepare the client for further diagnostic testing. A testosterone level of 680 ng/dL is high for a 67-year-old male, which could indicate an underlying medical condition. A prostate-specific antigen level of 10 ng/mL is elevated and could suggest prostate issues. Prolactin level of 5 ng/mL is within normal range but still needs further evaluation due to the other abnormal results. Therefore, preparing the client for further diagnostic testing is crucial to investigate the potential underlying health concerns. Incorrect options: A: Assess for possible galactorrhea with breast discharge - Irrelevant as galactorrhea is not indicated by the given results. B: Note the possibility of a testicular tumor - Testosterone level elevation is more indicative of non-testicular issues. C: Communicate to the provider that results were normal - Results are not normal, warranting further evaluation.

Correct answer:

The correct answer is D because watching the patient's respirations while listening for the effect on the sound can help differentiate between an S3 and an opening snap or ejection sound. Observing how the sound changes with the respiratory cycle can provide valuable information about the origin and nature of the sound. Choice A is incorrect because having the patient turn to the left side with the bell of the stethoscope is typically done to enhance the detection of a mitral murmur, not to assess a sound immediately after S2. Choice B is incorrect because asking the patient to hold their breath is more relevant in assessing for a pericardial friction rub, not in differentiating between heart sounds. Choice C is incorrect because assuming the sound is an S3 without further assessment can lead to a misdiagnosis. It is essential to confirm the nature of the sound through appropriate assessment techniques.

Correct answer:

A well-written expected outcome follows the SMART criteria: specific, measurable, achievable, realistic, and time-bound. 'The patient will identify all the high-salt food from a prepared list by discharge' meets these standards: it specifies the action (identifying high-salt foods), provides a measurable method (from a prepared list), and sets a clear timeline (by discharge), ensuring it's achievable and realistic for patient education. In contrast, 'The patient will feel less nauseated in 24 hours' is vague and subjective, lacking a measurable indicator. 'The patient will eat the right amount of food daily' fails to define 'right amount,' making it unmeasurable and unspecific. 'The patient will have enough sleep' is similarly imprecise, with no clear metric or timeframe. The correctly written outcome supports effective care planning by providing a concrete, evaluable goal, critical for tracking patient progress.