Thorax and Lungs Flashcards
- Which of these statements is true regarding the vertebra prominens? The vertebra prominens is:
a. The spinous process of C7.
b. Usually nonpalpable in most individuals.
c. Opposite the interior border of the scapula.
d. Located next to the manubrium of the sternum.
ANS: A
The spinous process of C7 is the vertebra prominens and is the most prominent bony spur protruding at the base of the neck. Counting ribs and intercostal spaces on the posterior thorax is difficult because of the muscles and soft tissue. The vertebra prominens is easier to identify and is used as a starting point in counting thoracic processes and identifying landmarks on the posterior chest.
- When performing a respiratory assessment on a patient, the nurse notices a costal angle of approximately 90 degrees. This characteristic is:
a. Observed in patients with kyphosis.
b. Indicative of pectus excavatum.
c. A normal finding in a healthy adult.
d. An expected finding in a patient with a barrel chest.
ANS: C
The right and left costal margins form an angle where they meet at the xiphoid process. Usually, this angle is 90 degrees or less. The angle increases when the rib cage is chronically overinflated, as in emphysema.
- When assessing a patient’s lungs, the nurse recalls that the left lung:
a. Consists of two lobes.
b. Is divided by the horizontal fissure.
c. Primarily consists of an upper lobe on the posterior chest.
d. Is shorter than the right lung because of the underlying stomach.
ANS: A
The left lung has two lobes, and the right lung has three lobes. The right lung is shorter than the left lung because of the underlying liver. The left lung is narrower than the right lung because the heart bulges to the left. The posterior chest is almost all lower lobes.
- Which statement about the apices of the lungs is true? The apices of the lungs:
a. Are at the level of the second rib anteriorly.
b. Extend 3 to 4 cm above the inner third of the clavicles.
c. Are located at the sixth rib anteriorly and the eighth rib laterally.
d. Rest on the diaphragm at the fifth intercostal space in the midclavicular line (MCL).
ANS: B
The apex of the lung on the anterior chest is 3 to 4 cm above the inner third of the clavicles. On the posterior chest, the apices are at the level of C7.
- During an examination of the anterior thorax, the nurse is aware that the trachea bifurcates anteriorly at the:
a. Costal angle.
b. Sternal angle.
c. Xiphoid process.
d. Suprasternal notch.
ANS: B
The sternal angle marks the site of tracheal bifurcation into the right and left main bronchi; it corresponds with the upper borders of the atria of the heart, and it lies above the fourth thoracic vertebra on the back.
- During an assessment, the nurse knows that expected assessment findings in the normal adult lung include the presence of:
a. Adventitious sounds and limited chest expansion.
b. Increased tactile fremitus and dull percussion tones.
c. Muffled voice sounds and symmetric tactile fremitus.
d. Absent voice sounds and hyperresonant percussion tones.
ANS: C
Normal lung findings include symmetric chest expansion, resonant percussion tones, vesicular breath sounds over the peripheral lung fields, muffled voice sounds, and no adventitious sounds.
- The primary muscles of respiration include the:
a. Diaphragm and intercostals.
b. Sternomastoids and scaleni.
c. Trapezii and rectus abdominis.
d. External obliques and pectoralis major.
ANS: A
The major muscle of respiration is the diaphragm. The intercostal muscles lift the sternum and elevate the ribs during inspiration, increasing the anteroposterior diameter. Expiration is primarily passive. Forced inspiration involves the use of other muscles, such as the accessory neck muscles—sternomastoid, scaleni, and trapezii muscles. Forced expiration involves the abdominal muscles.
- A 65-year-old patient with a history of heart failure comes to the clinic with complaints of “being awakened from sleep with shortness of breath.” Which action by the nurse is most appropriate?
a. Obtaining a detailed health history of the patient’s allergies and a history of asthma
b. Telling the patient to sleep on his or her right side to facilitate ease of respirations
c. Assessing for other signs and symptoms of paroxysmal nocturnal dyspnea
d. Assuring the patient that paroxysmal nocturnal dyspnea is normal and will probably resolve within the next week
ANS: C
The patient is experiencing paroxysmal nocturnal dyspnea—being awakened from sleep with shortness of breath and the need to be upright to achieve comfort.
- When assessing tactile fremitus, the nurse recalls that it is normal to feel tactile fremitus most intensely over which location?
a. Between the scapulae
b. Third intercostal space, MCL
c. Fifth intercostal space, midaxillary line (MAL)
d. Over the lower lobes, posterior side
ANS: A
Normally, fremitus is most prominent between the scapulae and around the sternum. These sites are where the major bronchi are closest to the chest wall. Fremitus normally decreases as one progresses down the chest because more tissue impedes sound transmission.
- The nurse is reviewing the technique of palpating for tactile fremitus with a new graduate. Which statement by the graduate nurse reflects a correct understanding of tactile fremitus? “Tactile fremitus:
a. “Is caused by moisture in the alveoli.”
b. “Indicates that air is present in the subcutaneous tissues.”
c. “Is caused by sounds generated from the larynx.”
d. “Reflects the blood flow through the pulmonary arteries.”
ANS: C
Fremitus is a palpable vibration. Sounds generated from the larynx are transmitted through patent bronchi and the lung parenchyma to the chest wall where they are felt as vibrations. Crepitus is the term for air in the subcutaneous tissues.
- During percussion, the nurse knows that a dull percussion note elicited over a lung lobe most likely results from:
a. Shallow breathing.
b. Normal lung tissue.
c. Decreased adipose tissue.
d. Increased density of lung tissue.
ANS: D
A dull percussion note indicates an abnormal density in the lungs, as with pneumonia, pleural effusion, atelectasis, or a tumor. Resonance is the expected finding in normal lung tissue.
- The nurse is observing the auscultation technique of another nurse. The correct method to use when progressing from one auscultatory site on the thorax to another is _______ comparison.
a. Side-to-side
b. Top-to-bottom
c. Posterior-to-anterior
d. Interspace-by-interspace
ANS: A
Side-to-side comparison is most important when auscultating the chest. The nurse should listen to at least one full respiration in each location. The other techniques are not correct.
- When auscultating the lungs of an adult patient, the nurse notes that low-pitched, soft breath sounds are heard over the posterior lower lobes, with inspiration being longer than expiration. The nurse interprets that these sounds are:
a. Normally auscultated over the trachea.
b. Bronchial breath sounds and normal in that location.
c. Vesicular breath sounds and normal in that location.
d. Bronchovesicular breath sounds and normal in that location.
ANS: C
Vesicular breath sounds are low-pitched, soft sounds with inspiration being longer than expiration. These breath sounds are expected over the peripheral lung fields where air flows through smaller bronchioles and alveoli.
- The nurse is auscultating the chest in an adult. Which technique is correct?
a. Instructing the patient to take deep, rapid breaths
b. Instructing the patient to breathe in and out through his or her nose
c. Firmly holding the diaphragm of the stethoscope against the chest
d. Lightly holding the bell of the stethoscope against the chest to avoid friction
ANS: C
Firmly holding the diaphragm of the stethoscope against the chest is the correct way to auscultate breath sounds. The patient should be instructed to breathe through his or her mouth, a little deeper than usual, but not to hyperventilate.
- The nurse is percussing over the lungs of a patient with pneumonia. The nurse knows that percussion over an area of atelectasis in the lungs will reveal:
a. Dullness.
b. Tympany.
c. Resonance.
d. Hyperresonance.
ANS: A
A dull percussion note signals an abnormal density in the lungs, as with pneumonia, pleural effusion, atelectasis, or a tumor.
- During auscultation of the lungs, the nurse expects decreased breath sounds to be heard in which situation?
a. When the bronchial tree is obstructed
b. When adventitious sounds are present
c. In conjunction with whispered pectoriloquy
d. In conditions of consolidation, such as pneumonia
ANS: A
Decreased or absent breath sounds occur when the bronchial tree is obstructed, as in emphysema, and when sound transmission is obstructed, as in pleurisy, pneumothorax, or pleural effusion.