The nurse is assessing a patient with a right pneumothorax. Which finding would the nurse expect?
Rationale:
Absence of breath sounds on the right side is expected in a patient with a right pneumothorax. This occurs because air in the pleural space collapses the lung, preventing air movement and sound transmission during auscultation. The lung cannot expand properly, leading to diminished or absent breath sounds on the affected side, which is a hallmark sign of pneumothorax.
A: Bilateral expiratory crackles reflect fluid in airways or alveoli, not localized air collapse; pneumothorax causes unilateral, not bilateral, breath sound changes.
C: Right-sided wheezes on inspiration indicate airway narrowing, typically bronchospasm, which differs from the lung collapse and air absence seen in pneumothorax.
D: Trachea deviated to the right would be unusual; pneumothorax on the right usually causes tracheal deviation away from the affected side due to pressure buildup.
A nurse is caring for a patient who is undergoing chemotherapy. Which intervention should be implemented to prevent infection?
Rationale:
Administer prophylactic antibiotics to prevent infection in a patient undergoing chemotherapy. Chemotherapy suppresses the immune system, increasing infection risk; prophylactic antibiotics help reduce bacterial proliferation and prevent opportunistic infections, thereby protecting the vulnerable patient. This intervention directly targets infection prevention by controlling potential pathogens before symptoms develop, which is crucial during immunosuppression caused by chemotherapy.
A: Provide the patient with a mask to wear. Masks reduce airborne contamination but do not comprehensively prevent infections caused by endogenous flora or other sources during chemotherapy-induced immunosuppression.
C: Reposition the patient to prevent complications. Repositioning primarily prevents pressure ulcers and respiratory issues, not directly addressing infection prevention in immunocompromised patients.
D: Perform a sputum culture. Sputum cultures identify existing infections but do not serve as a preventive measure against infection during chemotherapy treatment.
A patient is admitted with an exacerbation of chronic obstructive pulmonary disease (COPD). What is the priority intervention?
Rationale:
Administer a bronchodilator.
Bronchodilators are the priority because they rapidly relieve bronchospasm, improving airflow and oxygenation in COPD exacerbations. Immediate airway opening reduces respiratory distress and prevents further hypoxia. Other interventions assist but do not provide the urgent bronchodilation needed to stabilize breathing and prevent deterioration during acute exacerbations, making this the critical first step.
B: Administer IV steroids IV steroids reduce inflammation but act slower than bronchodilators, so they are not the immediate priority for relieving acute airway obstruction in COPD exacerbations.
C: Monitor blood pressure Monitoring blood pressure is important but secondary; it does not directly address airway constriction or respiratory distress in COPD exacerbations.
D: Encourage deep breathing exercises Deep breathing exercises aid lung expansion but cannot promptly reverse bronchospasm or hypoxia, making them unsuitable as the initial urgent intervention.
Which of the following drugs is a short-acting bronchodilator used for the relief of acute bronchospasm?
Rationale:
Ipratropium is a short-acting bronchodilator used for the relief of acute bronchospasm. It works by blocking muscarinic receptors in the airways, causing smooth muscle relaxation and rapid bronchodilation. Its onset of action is quick, making it suitable for immediate symptom relief during bronchospasm episodes, unlike long-term control medications that have slower effects or different mechanisms.
A: Montelukast primarily acts as a leukotriene receptor antagonist, preventing inflammation rather than providing immediate bronchodilation, and is used for maintenance therapy, not acute bronchospasm relief.
C: Beclomethasone is a corticosteroid aimed at reducing airway inflammation over time, lacking the rapid bronchodilatory effects needed for acute bronchospasm management.
D: Theophylline is a methylxanthine with a narrow therapeutic window and slower onset, making it less suitable for immediate treatment of acute bronchospasm compared to short-acting agents.
What is the best nursing response to the parent of a child with asthma who asks if his child can still participate in sports?
Rationale:
Children can usually play any type of sport if their asthma is well controlled. Asthma control enables children to safely engage in various physical activities without triggering symptoms, promoting overall health and well-being. Proper management, including medication adherence and monitoring, allows participation in sports without unnecessary restrictions, which supports both physical fitness and emotional development in children with asthma.
A: Children with asthma are usually restricted from physical activities. This statement is overly restrictive and outdated, as current asthma management focuses on enabling participation rather than imposing limitations, making this advice unnecessarily limiting.
C: Avoid swimming because breathing underwater is dangerous for people with asthma. This advice is misleading; swimming is often recommended due to warm, humid air, which can actually reduce asthma symptoms rather than pose a danger.
D: Even with good asthma control, I would advise limiting the child to one athletic activity per school year. This guidance is excessively cautious and not supported by evidence, unnecessarily restricting children's involvement in multiple sports despite effective asthma management.
A client is being evaluated for chronic bronchitis. Which symptom is most indicative of this condition?
Rationale:
A chronic productive cough is most indicative of chronic bronchitis. This symptom directly reflects the persistent inflammation and mucus hypersecretion in the bronchial tubes characteristic of the disease. Chronic bronchitis diagnosis often hinges on a productive cough lasting at least three months in two consecutive years, distinguishing it from other respiratory conditions through this hallmark clinical feature.
A: Frequent respiratory infections suggest compromised lung defense but are not specific to chronic bronchitis and can occur in various pulmonary diseases, making them less definitive for diagnosis.
B: Barrel-shaped chest primarily indicates emphysema due to hyperinflation, not chronic bronchitis, so it does not specifically identify the latter condition.
D: Wheezing and dyspnea are common in several respiratory illnesses, including asthma and COPD, but they lack the specificity that chronic productive cough provides for chronic bronchitis.
The nurse teaches a patient about the transmission of pulmonary tuberculosis (TB). Which statement, if made by the patient, indicates that teaching was effective?
Rationale:
Keeping the windows closed at home helps prevent the spread of pulmonary tuberculosis by reducing airborne transmission through contaminated air. Pulmonary TB bacteria spread primarily via airborne droplets when an infected person coughs or sneezes. Closing windows minimizes outside air circulation, thereby containing infectious droplets within a controlled environment and protecting others from exposure to the bacteria.
A: Taking the bus instead of driving does not influence TB transmission risk; public transportation can increase exposure due to close proximity and poor ventilation, making this choice ineffective for preventing spread.
B: Having the spouse sleep in another room reduces direct contact but overlooks airborne transmission; TB bacteria can linger in shared airspaces, so isolation alone cannot fully prevent spread.
D: Staying indoors whenever possible may limit contact with others but does not address airborne transmission mechanism; poor ventilation indoors can increase infection risk if windows remain open or air is recirculated.
A client with COPD is experiencing an exacerbation. Which finding is most concerning?
Rationale:
Use of accessory muscles for breathing is most concerning in a client with COPD exacerbation. This indicates increased work of breathing and respiratory distress, suggesting the patient is struggling to maintain adequate ventilation. It often precedes respiratory failure, necessitating urgent intervention to prevent further deterioration and potential need for mechanical support or intensive monitoring.
A: Productive cough with yellow sputum signals infection but is a common exacerbation symptom and less immediately dangerous than respiratory distress.
B: Respiratory rate of 24 breaths per minute is elevated but may still be compensatory rather than critical, reflecting moderate distress.
C: Oxygen saturation of 88% is low and concerning but can sometimes be managed with supplemental oxygen, unlike the severe effort shown by accessory muscle use.
The nurse is assessing a client with pleural effusion. Which finding is most expected?
Rationale:
Dullness to percussion over the affected area is the most expected finding in a client with pleural effusion.
This occurs because pleural effusion involves fluid accumulation in the pleural space, which dampens sound transmission and produces a dull sound when percussed. The fluid replaces air, leading to decreased resonance and a characteristic dull percussion note over the effusion site.
A: Bilateral crackles on auscultation typically indicate fluid within alveoli, not pleural fluid, making this irrelevant for pleural effusion assessment.
C: Hyperresonance on percussion suggests excess air, such as in pneumothorax or emphysema, not fluid accumulation in pleural effusion.
D: Increased fremitus occurs with lung consolidation; pleural effusion dampens vibrations, causing decreased fremitus over the affected area.
A patient develops sudden hemoptysis and dyspnea. What should the nurse do first?
Rationale:
Place the patient in an upright position. Positioning the patient upright helps prevent airway obstruction by facilitating drainage of blood and secretions, improving ventilation and oxygenation, and reducing the risk of aspiration during sudden hemoptysis and dyspnea. This immediate action stabilizes respiratory status before further assessment or interventions can be safely performed.
A: Call the rapid response team. Calling the team is essential but should follow initial measures to maintain airway patency and oxygenation. Immediate positioning takes priority to stabilize breathing before escalating emergency response.
C: Apply oxygen via nasal cannula. Oxygen delivery is beneficial but less urgent than positioning to protect the airway and enhance secretion clearance. Oxygen alone does not prevent aspiration or improve drainage.
D: Assess for recent anticoagulant use. Assessing anticoagulant history provides valuable information but does not address the immediate threat of airway compromise or respiratory distress in sudden hemoptysis.
A client with pneumonia has a pulse oximetry reading of 88%. What intervention should the nurse perform first?
Rationale:
The nurse should first raise the head of the bed. Elevating the head improves lung expansion and ventilation, enhancing oxygenation in patients with pneumonia. This simple positioning change can quickly increase oxygen saturation by reducing pressure on the diaphragm and promoting better air entry, making it the initial and most immediate intervention before other measures like adjusting oxygen flow or notifying providers.
A: Increase the oxygen flow rate does not address potential airway obstruction or ventilation-perfusion mismatch caused by positioning, which is a more immediate cause of low oxygen saturation.
C: Notify the healthcare provider immediately delays urgent bedside intervention that can rapidly improve oxygenation by optimizing patient positioning to enhance breathing mechanics.
D: Encourage deep breathing exercises is beneficial but slower to impact oxygen saturation and less effective than improving mechanical lung expansion through positioning first.
A King LT Airway:
Rationale:
A King LT Airway provides ventilation through a proximal and distal inflated cuff. This device is designed with two inflatable cuffs that seal the esophagus and oropharynx, enabling effective ventilation without needing tracheal intubation. Its dual cuff system allows positive pressure ventilation while minimizing the risk of gastric insufflation and aspiration, essential for emergency airway management.
A: Tip can sit in the tracheal or esophagus This is inaccurate since the King LT specifically sits in the esophagus, not the trachea, ensuring ventilation occurs around the laryngeal inlet rather than inside the trachea.
B: Provides a complete seal in the trachea The King LT does not seal the trachea; it seals the esophagus and oropharynx, differentiating it from devices designed for direct tracheal intubation.
D: Allows an ETT to be inserted through it The King LT is a supraglottic device and does not permit endotracheal tube passage; it functions independently for ventilation without serving as an intubation conduit.
What is photosynthesis?
Rationale:
Photosynthesis is the process in which plants use water, sunlight and carbon dioxide to form oxygen and energy in the form of sugar. This process converts light energy into chemical energy stored in glucose, releasing oxygen as a byproduct. It is fundamental for plant growth and sustains most life by producing food and oxygen through chlorophyll’s action in chloroplasts.
B: A process that consumes oxygen describes cellular respiration, not photosynthesis, which generates oxygen instead. This option confuses two biological processes with opposite gas exchanges and energy transformations, misrepresenting photosynthesis fundamentally.
C: A cycle without oxygen mischaracterizes photosynthesis, which produces oxygen as a crucial output. Oxygen generation differentiates it from processes like anaerobic respiration, making this choice inaccurate in defining photosynthesis.
D: None of the above dismisses the accurate description provided in option A. Since A correctly defines photosynthesis, this choice invalidates the correct explanation and disregards established biological understanding.
The nurse is monitoring a client receiving oxygen therapy at 4 L/min via nasal cannula. Which finding requires immediate action?
Rationale:
Restlessness and confusion require immediate action when monitoring a client receiving oxygen therapy at 4 L/min via nasal cannula. These symptoms may indicate hypoxia or worsening respiratory status, signaling a critical need for prompt assessment and intervention to prevent further deterioration and ensure patient safety.
A: Dry nasal mucosa is a common minor side effect of oxygen therapy and can be managed with humidification; it does not signify an urgent clinical problem.
C: Decreased respiratory rate to 12 breaths/min remains within normal adult limits and does not immediately suggest respiratory compromise requiring urgent response.
D: Oxygen saturation of 96% falls within the normal range, indicating adequate oxygenation and not necessitating immediate clinical action.
How should a patient use an Advair Diskus inhaler?
Rationale:
The patient should inhale slowly when using an Advair Diskus inhaler. This method ensures the medication reaches deep into the lungs, maximizing its effectiveness. Inhaling slowly allows the powder to be properly dispersed and deposited in the airways, improving symptom control. Rapid inhalation can cause medication to deposit in the throat, reducing lung delivery and therapeutic benefits.
A: Inhale rapidly Rapid inhalation causes the powder to settle in the throat rather than the lungs, decreasing medication efficacy and potentially causing irritation.
C: Shake before use Advair Diskus is a dry powder inhaler that does not require shaking; shaking could disrupt the powder's consistency and dose accuracy.
D: Use a spacer Spacers are designed for metered-dose inhalers, not dry powder inhalers like the Advair Diskus, making this accessory unnecessary and ineffective for proper drug delivery.
A client with emphysema is receiving oxygen therapy at 2 L/min. The client reports increasing shortness of breath. What is the nurse's priority action?
Rationale:
The nurse's priority action is to assess the client's respiratory status and oxygen saturation. This assessment provides essential data on the client’s current condition, enabling the nurse to identify the severity of respiratory distress and oxygenation levels. It guides appropriate interventions, ensures patient safety, and prevents premature or unnecessary changes in oxygen therapy without clinical evidence.
A: Increase the oxygen flow rate to 4 L/min. Adjusting oxygen without assessment risks worsening CO2 retention in emphysema patients, potentially causing respiratory depression and hypoventilation. Oxygen therapy changes require clinical justification.
B: Notify the healthcare provider immediately. Immediate notification without assessment may delay timely intervention; the nurse must first gather clinical information to provide accurate data and determine urgency.
D: Position the client in high Fowler's position. While positioning can aid breathing, it is not the initial priority before evaluating respiratory status and oxygen saturation to tailor care accurately.
Beri beri is caused by the deficiency of which Vitamin?
Rationale:
Beri beri is caused by the deficiency of Vitamin B1. Vitamin B1, also known as thiamine, plays a crucial role in carbohydrate metabolism and nerve function. Its deficiency leads to the symptoms of beri beri, including weakness, nerve damage, and cardiovascular issues. The disease specifically arises when the body lacks adequate thiamine to support essential metabolic processes and neurological health.
B: Vitamin B2 Riboflavin deficiency primarily affects energy production and skin health, but does not cause the neurological and cardiac symptoms characteristic of beri beri.
C: Vitamin B3 Niacin deficiency causes pellagra, marked by dermatitis, diarrhea, and dementia, differing significantly from the symptoms of beri beri.
D: Vitamin C Its deficiency leads to scurvy, identified by bleeding gums and poor wound healing, unrelated to beri beri's neurological and cardiac manifestations.
A nurse is caring for four clients. Which one would the nurse see first?
Rationale:
Client C, the hypertensive client with a blood pressure of 188/92 mm Hg, should be seen first. This client’s severely elevated blood pressure poses an immediate risk for complications like stroke or heart attack, requiring prompt assessment and intervention to prevent life-threatening outcomes, prioritizing their care above others with less urgent needs or lower risk profiles.
A: Client who needs a beta blocker, and has a blood pressure of 98/58 mm Hg. This client’s low blood pressure suggests caution but does not demand urgent attention compared to hypertensive crisis, making this situation less critical initially.
B: Client who had a first dose of captopril and needs to use the bathroom. Although monitoring post-medication effects is important, this client’s need is routine and lacks urgency compared to a hypertensive emergency, allowing delayed response.
D: Client who needs pain medication prior to a dressing change of a surgical wound. Pain management is important but not immediately life-threatening, so this client’s care can be deferred until more critical conditions are addressed.
A client is being evaluated for obstructive sleep apnea. Which assessment finding supports this diagnosis?
Rationale:
Daytime sleepiness and snoring support the diagnosis of obstructive sleep apnea. This condition causes repeated airway obstruction during sleep, leading to fragmented sleep and oxygen desaturation. Excessive daytime sleepiness results from poor sleep quality, while snoring is a common symptom due to turbulent airflow through a narrowed airway, both hallmark signs confirming obstructive sleep apnea.
B: Morning headaches and blurred vision suggest possible vascular or neurological issues rather than airway obstruction. These symptoms do not specifically indicate disrupted breathing patterns or sleep fragmentation typical of obstructive sleep apnea.
C: Intermittent chest pain at night is more indicative of cardiac or gastrointestinal conditions. It lacks direct association with airway collapse or sleep-related breathing interruptions characteristic of obstructive sleep apnea.
D: Difficulty falling asleep primarily reflects insomnia or other sleep onset disorders, not the repetitive airway obstruction and sleep fragmentation seen in obstructive sleep apnea, which affects sleep maintenance more than initiation.
A client with bronchitis is prescribed guaifenesin. What is the primary purpose of this medication?
Rationale:
Guaifenesin’s primary purpose is to thin mucus and promote expectoration. This medication acts as an expectorant, loosening and thinning bronchial secretions, which facilitates easier coughing up of mucus. It helps clear the airways and improves breathing in bronchitis patients by reducing mucus viscosity, making the cough more productive and relieving chest congestion effectively.
A: To suppress the cough reflex. This option describes antitussive agents, not guaifenesin, which actually encourages productive coughing rather than inhibiting it.
C: To reduce airway inflammation. Anti-inflammatory drugs like corticosteroids serve this function; guaifenesin does not possess anti-inflammatory properties.
D: To prevent bacterial infection. Antibiotics prevent infections, but guaifenesin only affects mucus consistency without any antibacterial activity.
The nurse is evaluating the effectiveness of oxygen therapy in a client with hypoxemia. Which finding indicates improvement?
Rationale:
Oxygen saturation increases from 88% to 95%. This directly measures the oxygen level in the blood, indicating improved oxygenation and gas exchange. An increase to 95% shows effective oxygen therapy, resolving hypoxemia by raising arterial oxygen levels, which is the primary goal of treatment. Other signs may be secondary or subjective, but oxygen saturation provides objective evidence of improvement.
A: Respiratory rate decreases from 30 to 24 breaths/min. While a lowered respiratory rate may suggest less distress, it does not specifically quantify oxygenation status or guarantee improved oxygen delivery to tissues.
C: Heart rate decreases from 110 to 100 beats/min. Reduced heart rate alone may reflect decreased stress but does not directly indicate enhanced oxygen saturation or correction of hypoxemia.
D: Client reports reduced fatigue. Subjective improvement in fatigue is positive but can be influenced by many factors and is not a definitive indicator of effective oxygen therapy or oxygenation status.
A nurse is teaching a newly licensed nurse about pulmonary function tests. The nurse should include which of the following is the vital capacity?
Rationale:
Vital capacity is the maximum volume of air that is expired after a maximum inspiration. This measurement reflects the total usable volume of the lungs during a full breath cycle, crucial for assessing pulmonary health and function, as it involves the deepest possible inhalation followed by the most forceful exhalation, highlighting lung capacity and respiratory efficiency.
A: The volume of air inspired and expired with a regular breath defines tidal volume, not vital capacity.
C: The amount of additional air inspired after a regular breath describes inspiratory reserve volume, not vital capacity.
D: The amount of air in the lung after maximal inspiration represents total lung capacity, not vital capacity.
The nurse is caring for a client with acute respiratory distress syndrome (ARDS). Which intervention is most likely to improve oxygenation?
Rationale:
Positioning the client in the prone position is most likely to improve oxygenation in ARDS.
Prone positioning enhances ventilation-perfusion matching by redistributing lung perfusion and improving alveolar recruitment, which reduces shunting and increases oxygenation. It helps open collapsed posterior lung regions, thereby improving gas exchange and oxygen delivery to tissues in clients with severe hypoxemia typical of ARDS.
A: Increasing the oxygen flow rate provides more oxygen but does not address alveolar collapse or improve ventilation-perfusion mismatch characteristic of ARDS.
C: Performing frequent oral suctioning maintains airway patency but does not directly enhance oxygenation or alveolar recruitment in ARDS.
D: Administering a bronchodilator relaxes airway muscles but does not significantly improve oxygenation when alveolar edema and shunting predominate in ARDS.
The nurse observes bubbling in the water-seal chamber of a chest tube drainage system. What is the nurse's best action?
Rationale:
Bubbling in the water-seal chamber indicates an air leak, so the nurse’s best action is to check the system for air leaks. This ensures patient safety by identifying if the leak originates from the patient, tubing connections, or drainage system, allowing prompt correction and preventing complications such as pneumothorax or infection. Careful assessment maintains system integrity and function.
A: Clamping the chest tube risks causing tension pneumothorax by trapping air in the pleural space. Immediate clamping without assessing the source of bubbling can lead to dangerous respiratory complications.
B: Increasing suction without locating the air leak may worsen the problem or damage lung tissue. Suction adjustments should follow identifying and addressing leaks, not as an immediate response to bubbling.
D: Notifying the healthcare provider immediately bypasses the nurse’s responsibility to first assess the drainage system. Prompt evaluation of the source of bubbling is essential before escalating care.
A patient with a tracheostomy tube cannot cough up secretions effectively. What should the nurse do next?
Rationale:
The nurse should use sterile gloves and perform suctioning. Suctioning is necessary to remove secretions that the patient cannot expectorate due to the tracheostomy, preventing airway obstruction and respiratory distress. Sterile technique minimizes infection risk. This intervention directly clears airway secretions, improving ventilation and patient comfort, which is essential in managing ineffective cough with tracheostomy tubes.
A: Encourage the use of an incentive spirometer does not directly clear airway secretions and is more suited for preventing atelectasis rather than immediate secretion removal.
B: Promote increased oral fluid intake helps thin secretions but does not address the immediate inability to clear secretions mechanically.
D: Preoxygenate the patient for 3 minutes before suctioning is excessive; preoxygenation is brief and supportive, not a primary action for secretion clearance.
Which observation by the nurse would indicate that a toddler with respiratory syncytial virus (RSV) is improving?
Rationale:
Client actively playing with toys with an oxygen saturation of 96%. This observation shows the toddler is alert, engaged, and maintaining adequate oxygenation, indicating respiratory status is stabilizing. Active play reflects improved energy and decreased respiratory distress, while an oxygen saturation of 96% confirms effective gas exchange, both essential markers of recovery from RSV infection in a toddler.
B: Client resting in bed with limited interest in play or activities demonstrates lethargy and decreased responsiveness, signs of ongoing illness rather than improvement in RSV.
C: Client respiratory rate within normal limits for age indicates better breathing control but does not alone confirm overall clinical improvement or increased activity levels.
D: Client coughing copious amounts of green sputum and requires occasional suctioning suggests persistent infection and airway irritation, reflecting continued respiratory compromise instead of recovery.
A nurse assesses several clients who have a history of respiratory disorders. Which client would the nurse assess first?
Rationale:
A 66-year-old client with a barrel chest and clubbed fingernails should be assessed first. Barrel chest and clubbing indicate chronic hypoxia and possible advanced respiratory disease, which can lead to severe complications. This client’s physical signs suggest long-term oxygen deprivation, requiring immediate evaluation to prevent further deterioration and ensure timely intervention for potential respiratory failure or cardiac issues.
B: A 48-year-old client with an oxygen saturation level of 92% at rest shows mild hypoxemia but is less critical than signs of chronic hypoxia. Immediate threat level is lower, allowing for delayed assessment.
C: A 35-year-old client who reports orthopnea indicates difficulty breathing when lying flat but lacks signs of severe hypoxia or distress, making this situation less urgent for initial evaluation.
D: A 27-year-old client with a heart rate of 120 beats/min indicates tachycardia, which may be concerning but does not directly suggest severe respiratory compromise needing the nurse’s immediate attention.
Which method of oxygenation least likely produces anxiety and apprehension?
Rationale:
Nasal Cannula least likely produces anxiety and apprehension during oxygenation.
The nasal cannula is minimally intrusive, allowing patients to speak, eat, and move comfortably. Its light design and lower oxygen flow create less claustrophobia and psychological distress compared to masks. This device promotes ease of use and greater patient cooperation, reducing feelings of confinement and fear often associated with more restrictive oxygen delivery systems.
B: Simple Face mask covers the nose and mouth, restricting movement and speech, which can induce discomfort and heightened anxiety in patients during oxygen therapy.
C: Non Rebreather mask delivers high oxygen concentration but is bulky and restrictive, often causing feelings of suffocation and increased apprehension.
D: Partial Rebreather mask involves a reservoir bag and mask, limiting freedom and potentially provoking claustrophobic reactions and emotional distress during oxygen administration.
The nurse supervises a student nurse who is assigned to take care of a patient with active tuberculosis (TB). Which action, if performed by the student nurse, would require an intervention by the nurse?
Rationale:
A surgical face mask is applied before visiting the patient. Surgical masks do not provide adequate protection against airborne transmission of tuberculosis; instead, an N95 respirator mask is necessary to prevent inhalation of airborne TB particles. This distinction ensures effective infection control and safety for healthcare workers entering the patient’s environment with active TB.
A: The patient is offered a tissue from the box at the bedside. Providing tissues supports respiratory hygiene and containment of droplets, aligning with infection control protocols for TB patients. This action promotes safe disposal of secretions and does not require intervention.
C: A snack is brought to the patient from the unit refrigerator. Delivering snacks from the unit refrigerator is acceptable and does not pose an infection risk if proper hygiene practices are followed. This action does not breach isolation precautions.
D: Hand washing is performed before entering the patient's room. Hand hygiene is a fundamental infection control measure that reduces pathogen transmission. Performing hand washing before entering the room is appropriate and necessary for preventing contamination.
Which of the following factors will have the greatest influence on evaporation in a humidifier?
Rationale:
Temperature will have the greatest influence on evaporation in a humidifier. Higher temperatures increase the kinetic energy of water molecules, accelerating their transition from liquid to vapor. This enhanced molecular activity directly boosts evaporation rates, making temperature the most significant factor affecting how quickly moisture disperses into the air within a humidifier setup.
A: Time Longer durations allow more evaporation but do not inherently speed up the process; time simply extends the period over which evaporation can occur, not its rate or intensity in humidifiers.
B: Pressure Lower pressure can aid evaporation but typical atmospheric pressure changes are minimal indoors, making pressure a less impactful factor for humidifier evaporation compared to temperature.
C: Surface area Increasing surface area can enhance evaporation by exposing more water to air, yet without temperature elevation, the molecular energy remains insufficient for rapid vaporization.