Exam (elaborations) TEST BANK FOR FUNDAMENTALS OF NURSING 9TH EDITION POTTER
TEST BANK FOR FUNDAMENTALS OF NURSING 9TH EDITION POTTER Chapter 41:
... [Show More] Oxygenation Fundamentals of Nursing, 9th Edition MULTIPLE CHOICE 1. A nurse is teaching staff about the conduction of the heart. In which order will the nurse present the conduction cycle, starting with the first structure? 1. Bundle of His 2. Purkinje network 3. Intraatrial pathways 4. Sinoatrial (SA) node 5. Atrioventricular (AV) node a. 5, 4, 3, 2, 1 b. 4, 3, 5, 1, 2 c. 4, 5, 3, 1, 2 d. 5, 3, 4, 2, 1 ANS: B The conduction system originates with the SA node, the “pacemaker” of the heart. The electrical impulses are transmitted through the atria along intraatrial pathways to the AV node. It assists atrial emptying by delaying the impulse before transmitting it through the Bundle of His and the ventricular Purkinje network. 2. A nurse is teaching the patient with mitral valve problems about the valves in the heart. Starting on the right side of the heart, describe the sequence of the blood flow through these valves. 1. Mitral 2. Aortic 3. Tricuspid NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 4. Pulmonic a. 1, 3, 2, 4 b. 4, 3, 2, 1 c. 3, 4, 1, 2 d. 2, 4, 1, 3 ANS: C The blood flows through the valves in the following direction: tricuspid, pulmonic, mitral, and aortic. 3. A nurse explains the function of the alveoli to a patient with respiratory problems. Which information about the alveoli’s function will the nurse share with the patient? a. Carries out gas exchange b. Regulates tidal volume c. Produces hemoglobin d. Stores oxygen ANS: A The alveolus is a capillary membrane that allows gas exchange of oxygen and carbon dioxide during respiration. The alveoli do not store oxygen, regulate tidal volume, or produce hemoglobin. 4. A nurse auscultates heart sounds. When the nurse hears S2, which valves is the nurse hearing close? a. Aortic and mitral b. Mitral and tricuspid c. Aortic and pulmonic d. Mitral and pulmonic NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions ANS: C As the ventricles empty, the ventricular pressures decrease, allowing closure of the aortic and pulmonic valves, producing the second heart sound, S2. The mitral and tricuspid produce the first heart sound, S1. The aortic and mitral do not close at the same time. The mitral and pulmonic do not close at the same time. 5. The nurse is teaching about the process of exchanging gases through the alveolar capillary membrane. Which term will the nurse use to describe this process? a. Ventilation b. Surfactant c. Perfusion d. Diffusion ANS: D Diffusion is the process of gases exchanging across the alveoli and capillaries of body tissues.Ventilation is the process of moving gases into and out of the lungs. Surfactant is a chemical produced in the lungs to maintain the surface tension of the alveoli and keep them from collapsing. Perfusion is the ability of the cardiovascular system to carry oxygenated blood to tissues and return deoxygenated blood to the heart. 6. A nurse is caring for a patient who was in a motor vehicle accident that resulted in cervical trauma to C4. Which assessment is the priority? a. Pulse b. Respirations c. Temperature d. Blood pressure ANS: B Respirations and oxygen saturation are the priorities. Cervical trauma at C3 to C5 usually results in paralysis of the phrenic nerve. When the phrenic nerve is damaged, the diaphragm does not descend properly, thus reducing inspiratory lung volumes and causing hypoxemia. While pulse NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions and blood pressure are important, respirations are the priority. Temperature is not a high priority in this situation. 7. The patient is breathing normally. Which process does the nurse consider is working properly when the patient inspires? a. Stimulation of chemical receptors in the aorta b. Reduction of arterial oxygen saturation levels c. Requirement of elastic recoil lung properties d. Enhancement of accessory muscle usage ANS: A Inspiration is an active process, stimulated by chemical receptors in the aorta. Reduced arterial oxygen saturation levels indicate hypoxemia, an abnormal finding. Expiration is a passive process that depends on the elastic recoil properties of the lungs, requiring little or no muscle work. Prolonged use of the accessory muscles does not promote effective ventilation and causes fatigue. 8. The home health nurse recommends that a patient with respiratory problems install a carbon monoxide detector in the home. What is the rationale for the nurse’s action? a. Carbon monoxide detectors are required by law in the home. b. Carbon monoxide tightly binds to hemoglobin, causing hypoxia. c. Carbon monoxide signals the cerebral cortex to cease ventilations. d. Carbon monoxide combines with oxygen in the body and produces a deadly toxin. ANS: B Carbon monoxide binds tightly to hemoglobin; therefore, oxygen is not able to bind to hemoglobin and be transported to tissues, causing hypoxia. A carbon monoxide detector is not required by law, does not signal the cerebral cortex to cease ventilations, and does not combine with oxygen but with hemoglobin to produce a toxin. NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 9. While performing an assessment, the nurse hears crackles in the patient’s lung fields. The nurse also learns that the patient is sleeping on three pillows to help with the difficulty breathing during the night. Which condition will the nurse most likely observe written in the patient’s medical record? a. Atrial fibrillation b. Myocardial ischemia c. Left-sided heart failure d. Right-sided heart failure ANS: C Left-sided heart failure results in pulmonary congestion, the signs and symptoms of which include shortness of breath, cough, crackles, and paroxysmal nocturnal dyspnea (difficulty breathing when lying flat). Right-sided heart failure is systemic and results in peripheral edema, weight gain, and distended neck veins. Atrial fibrillation is often described as an irregularly irregular rhythm; rhythm is irregular because of the multiple pacemaker sites. Myocardial ischemia results when the supply of blood to the myocardium from the coronary arteries is insufficient to meet myocardial oxygen demands, producing angina or myocardial infarction. 10. A patient has a myocardial infarction. On which primary blood vessel will the nurse focus care to reduce ischemia? a. Superior vena cava b. Pulmonary artery c. Coronary artery d. Carotid artery ANS: C A myocardial infarction is the lack of blood flow due to obstruction to the coronary artery, which supplies the heart with blood. The superior vena cava returns blood back to the heart. The pulmonary artery supplies deoxygenated blood to the lungs. The carotid artery supplies blood to the brain. NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 11. A nurse is teaching a health class about the heart. Which information from the class members indicates teaching by the nurse is successful for the flow of blood through the heart, starting in the right atrium? a. Right ventricle, left ventricle, left atrium b. Left atrium, right ventricle, left ventricle c. Right ventricle, left atrium, left ventricle d. Left atrium, left ventricle, right ventricle ANS: C Unoxygenated blood flows through the venae cavae into the right atrium, where it is pumped down to the right ventricle; the blood is then pumped out the pulmonary artery and is returned oxygenated via the pulmonary vein to the left atrium, where it flows to the left ventricle and is pumped out to the rest of the body via the aorta. 12. The nurse suspects the patient has increased afterload. Which piece of equipment should the nurse obtain to determine the presence of this condition? a. Pulse oximeter b. Oxygen cannula c. Blood pressure cuff d. Yankauer suction tip catheter ANS: C A blood pressure cuff is needed. The diastolic aortic pressure is a good clinical measure of afterload. Afterload is the resistance to left ventricular ejection. In hypertension the afterload increases, making cardiac workload also increase. A pulse oximeter is used to monitor the level of arterial oxygen saturation; it will not help determine increased afterload. While an oxygen cannula may be needed to help decrease the effects of increased afterload, it will not help determine the presence of afterload. A Yankauer suction tip catheter is used to suction the oral cavity. NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 13. A patient has heart failure and cardiac output is decreased. Which formula can the nurse use to calculate cardiac output? a. Myocardial contractility × Myocardial blood flow b. Ventricular filling time/Diastolic filling time c. Stroke volume × Heart rate d. Preload/Afterload ANS: C Cardiac output can be calculated by multiplying the stroke volume and the heart rate. The other options are not measures of cardiac output. 14. A patient’s heart rate increased from 94 to 164 beats/min. What will the nurse expect? a. Increase in diastolic filling time b. Decrease in hemoglobin level c. Decrease in cardiac output d. Increase in stroke volume ANS: C With a sustained heart rate greater than 160 beats/min, diastolic filling time decreases, decreasing stroke volume and cardiac output. The hemoglobin level would not be affected. 15. The nurse is careful to monitor a patient’s cardiac output. Which goal is the nurse trying to achieve? a. To determine peripheral extremity circulation b. To determine oxygenation requirements c. To determine cardiac dysrhythmias d. To determine ventilation status ANS: A NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions Cardiac output indicates how much blood is being circulated systemically throughout the body to the periphery. The amount of blood ejected from the left ventricle each minute is the cardiac output. Oxygen status would be determined by pulse oximetry and the presence of cyanosis. Cardiac dysrhythmias are an electrical impulse monitored through ECG results. Ventilation status is measured by respiratory rate, pulse oximetry, and capnography. Capnography provides instant information about the patient’s ventilation. Ventilation status does not depend solely on cardiac output. 16. A nurse is caring for a group of patients. Which patient should the nurse see first? a. A patient with hypercapnia wearing an oxygen mask b. A patient with a chest tube ambulating with the chest tube unclamped c. A patient with thick secretions being tracheal suctioned first and then orally d. A patient with a new tracheostomy and tracheostomy obturator at bedside ANS: A The mask is contraindicated for patients with carbon dioxide retention (hypercapnia) because retention can be worsened; the nurse must see this patient first to correct the problem. All the rest are using correct procedures and do not need to be seen first. A chest tube should not be clamped when ambulating. Clamping a chest tube is contraindicated when ambulating or transporting a patient. Clamping can result in a tension pneumothorax. Use nasotracheal suctioning before pharyngeal suctioning whenever possible. The mouth and pharynx contain more bacteria than the trachea. Keep tracheostomy obturator at bedside with a fresh (new) tracheostomy to facilitate reinsertion of the outer cannula if dislodged. 17. A patient has inadequate stroke volume related to decreased preload. Which treatment does the nurse prepare to administer? a. Diuretics b. Vasodilators c. Chest physiotherapy d. Intravenous (IV) fluids ANS: D NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions Preload is affected by the circulating volume; if the patient has decreased fluid volume, it will need to be replaced with fluid or blood therapy. Preload is the amount of blood in the left ventricle at the end of diastole, often referred to as end-diastolic volume. Giving diuretics and vasodilators will make the situation worse. Diuretics causes fluid loss; the patient is already low on fluids or the preload would not be decreased. Vasodilators reduced blood return to the heart, making the situation worse; the patient does not have enough blood and fluid to the heart or the preload would not be decreased. Chest physiotherapy is a group of therapies for mobilizing pulmonary secretions. Chest physiotherapy will not help this cardiovascular problem. 18. A nurse is preparing to suction a patient. The pulse is 65 and pulse oximetry is 94%. Which finding will cause the nurse to stop suctioning? a. Pulse 75 b. Pulse 80 c. Oxygen saturation 91% d. Oxygen saturation 88% ANS: D Stop when oxygen saturation is 88%. Monitor patient’s vital signs and oxygen saturation during procedure; note whether there is a change of 20 beats/min (either increase or decrease) or if pulse oximetry falls below 90% or 5% from baseline. If this occurs, stop suctioning. A pulse rate of 75 is only 10 beats different from the start of the procedure. A pulse rate of 80 is 15 beats different from the start of suctioning. Oxygen saturation of 91% is not 5% from baseline or below 90%. 19. The patient has right-sided heart failure. Which finding will the nurse expect when performing an assessment? a. Peripheral edema b. Basilar crackles c. Chest pain d. Cyanosis ANS: A Right-sided heart failure results from inability of the right side of the heart to pump effectively, leading to a systemic backup. Peripheral edema, distended neck veins, and weight gain are signs NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions of right-sided failure. Basilar crackles can indicate pulmonary congestion from left-sided heart failure. Cyanosis and chest pain result from inadequate tissue perfusion. 20. A nurse is reviewing the electrocardiogram (ECG) results. Which portion of the conduction system does the nurse consider when evaluating the P wave? a. SA node b. AV node c. Bundle of His d. Purkinje fibers ANS: A The P wave represents the electrical conduction through both atria; the SA node initiates electrical conduction through the atria. The AV node conducts down through the bundle of His and the Purkinje fibers to cause ventricular contraction. 21. A nurse teaches a patient about atelectasis. Which statement by the patient indicates an understanding of atelectasis? a. “Atelectasis affects only those with chronic conditions such as emphysema.” b. “It is important to do breathing exercises every hour to prevent atelectasis.” c. “If I develop atelectasis, I will need a chest tube to drain excess fluid.” d. “Hyperventilation will open up my alveoli, preventing atelectasis.” ANS: B Atelectasis develops when alveoli do not expand. Breathing exercises, especially deep breathing and incentive spirometry, increase lung volume and open the airways, preventing atelectasis. Deep breathing also opens the pores of Kohn between alveoli to allow sharing of oxygen between alveoli. Atelectasis can affect anyone who does not deep breathe. A chest tube is for pneumothorax or hemothorax. It is deep breathing, not hyperventilation, that prevents atelectasis. NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 22. The nurse is caring for a patient with respiratory problems. Which assessment finding indicates a late sign of hypoxia? a. Elevated blood pressure b. Increased pulse rate c. Restlessness d. Cyanosis ANS: D Cyanosis, blue discoloration of the skin and mucous membranes caused by the presence of desaturated hemoglobin in capillaries, is a late sign of hypoxia. Elevated blood pressure, increased pulse rate, and restlessness are early signs of hypoxia. 23. A nurse is caring for a 5-year-old patient whose temperature is 101.2° F. The nurse expects this patient to hyperventilate. Which factor does the nurse remember when planning care for this type of hyperventilation? a. Anxiety over illness b. Decreased drive to breathe c. Increased metabolic demands d. Infection destroying lung tissues ANS: C Increased body temperature (fever) increases the metabolic rate, thereby increasing carbon dioxide production. The increased carbon dioxide level stimulates an increase in the patient’s rate and depth of respiration, causing hyperventilation. Anxiety can cause hyperventilation, but this is not the direct cause from a fever. Sleep causes a decreased respiratory drive; hyperventilation speeds up breathing. The cause of the fever in this question is unknown. 24. A nurse is preparing a patient for nasotracheal suctioning. In which order will the nurse perform the steps, beginning with the first step? 1. Insert catheter. 2. Apply suction and remove. NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 3. Have patient deep breathe. 4. Encourage patient to cough. 5. Attach catheter to suction system. 6. Rinse catheter and connecting tubing. a. 1, 2, 3, 4, 5, 6 b. 4, 5, 1, 2, 3, 6 c. 5, 3, 1, 2, 4, 6 d. 3, 1, 2, 5, 4, 6 ANS: C The steps for nasotracheal suctioning are as follows: Verify that catheter is attached to suction; have patient deep breathe; insert catheter; apply intermittent suction for no more than 10 seconds and remove; encourage patient to cough; and rinse catheter and connecting tubing with normal saline. 25. A patient has carbon dioxide retention from lung problems. Which type of diet will the nurse most likely suggest for this patient? a. Low-carbohydrate b. Low-caffeine c. High-caffeine d. High-carbohydrate ANS: A A low-carbohydrate diet is best. Diets high in carbohydrates play a role in increasing the carbon dioxide load for patients with carbon dioxide retention. As carbohydrates are metabolized, an increased load of carbon dioxide is created and excreted via the lungs. A low- or high-caffeine diet is not as important as the carbohydrate load. NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 26. A nurse is caring for a patient who is taking warfarin (Coumadin) and discovers that the patient is taking garlic to help with hypertension. Which condition will the nurse assess for in this patient? a. Increased cholesterol level b. Distended jugular vein c. Bleeding d. Angina ANS: C Patients taking warfarin (Coumadin) for anticoagulation prolong the prothrombin time (PT)/international normalized ratio (INR) results if they are taking gingko biloba, garlic, or ginseng with the anticoagulant. The drug interaction can precipitate a life-threatening bleed. Increased cholesterol levels are associated with saturated fat dietary intake. A distended jugular vein and peripheral edema are associated with damage to the right side of the heart. Angina is temporary ischemia of the heart muscle. 27. A nurse is caring for a patient who has poor tissue perfusion as the result of hypertension. When the patient asks what to eat for breakfast, which meal should the nurse suggest? a. A cup of nonfat yogurt with granola and a handful of dried apricots b. Whole wheat toast with butter and a side of bacon c. A bowl of cereal with whole milk and a banana d. Omelet with sausage, cheese, and onions ANS: A A 2000-calorie diet of fruits, vegetables, and low-fat dairy foods that are high in fiber, potassium, calcium, and magnesium and low in saturated and total fat helps prevent and reduce the effects of hypertension. Nonfat yogurt with granola is a good source of calcium, fiber, and potassium; dried apricots add a second source of potassium. Although cereal and a banana provide fiber and potassium, skim milk should be substituted for whole milk to decrease fat. An omelet with sausage and cheese is high in fat. Butter and bacon are high in fat. NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 28. Upon auscultation of the patient’s chest, the nurse hears a whooshing sound at the fifth intercostal space. What does this finding indicate to the nurse? a. The beginning of the systolic phase b. Regurgitation of the mitral valve c. The opening of the aortic valve d. Presence of orthopnea ANS: B When regurgitation occurs, there is a backflow of blood into an adjacent chamber. For example, in mitral regurgitation the mitral leaflets do not close completely. When the ventricles contract, blood escapes back into the atria, causing a murmur, or “whooshing” sound. The systolic phase begins with ventricular filling and closing of the aortic valve, which is heard as the first heart sound, S1. Orthopnea is an abnormal condition in which a patient uses multiple pillows when reclining to breathe easier or sits leaning forward with arms elevated. 29. A nurse is caring for a patient with chronic obstructive pulmonary disease (COPD) who is receiving 2 L/min of oxygen. Which oxygen delivery device is most appropriate for the nurse to administer the oxygen? a. Nasal cannula b. Simple face mask c. Non-rebreather mask d. Partial non-rebreather mask ANS: A Nasal cannulas deliver oxygen from 1 to 6 L/min. All other devices (simple face mask, nonrebreather mask, and partial non-rebreather mask) are intended for flow rates greater than 6 L/min. NURSINGTB.COM FUNDAMENTALS OF NURSING 9TH EDITION POTTER TEST BANK NURSINGTB.COM Prime yourself for your Tests – Study Questions 30. The nurse needs to closely monitor the oxygen status of an older-adult patient undergoing anesthesia because of which age-related change? a. Thinner heart valves cause lipid accumulation and fibrosis. b. Diminished respiratory muscle strength may cause poor chest expansion. c. Alterations in mental status prevent patients’ awareness of ineffective breathing. d. An increased number of pacemaker cells make proper anesthesia induction more difficult. ANS: B Age-related changes in the thorax that occur from ossification of costal cartilage, decreased space between vertebrae, and diminished respiratory muscle strength lead to problems with chest expansion and oxygenation,whereby the patient will have difficulty excreting anesthesia gas. The nurse needs to monitor the patient’s oxygen status carefully to make sure the patient does not retain too much of the drug. Older adults experience alterations in cardiac function as a result of calcification of the conduction pathways, thicker and stiffer heart valves caused by lipid accumulation and fibrosis, and a decrease in the number of pacemaker cells in the SA node. Altered mental status is not a normal age-related change; it indicates possible cardiac and/or respiratory problems. 31. The nurse determines that an older-adult patient is at risk for infection due to decreased immunity. Which plan of care best addresses the prevention of infection for the patient? a. Inform the patient of the importance of finishing the entire dose of antibiotics. b. Encourage the patient to stay up-to-date
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