What is one of the purposes of palpation during the cardiac assessment?
To visualize abnormalities such as bruising
To assess the size of the heart
To identify the correct location for auscultation
To assess for normal valve closure and murmurs
The Correct Answer is C
Choice A reason: Visualization of abnormalities like ecchymosis, petechiae, or chest wall deformities is achieved through inspection, not palpation. Inspection is the initial step of the physical examination, requiring adequate lighting to identify superficial vascular changes or structural asymmetries before the nurse applies manual pressure to the thoracic cage or precordium.
Choice B reason: While percussion was historically used to estimate cardiac borders, palpation is not a reliable method for determining the actual dimensions or mass of the myocardium. Radiographic imaging, such as a chest X-ray or echocardiography, provides the definitive clinical data required to diagnose cardiomegaly or ventricular hypertrophy with high diagnostic accuracy.
Choice C reason: Palpation allows the clinician to locate anatomical landmarks, such as the Angle of Louis and the intercostal spaces, which are essential for the accurate placement of the stethoscope. By identifying the apical pulse or point of maximal impulse, the nurse ensures the diaphragm and bell are positioned over the correct valvular areas.
Choice D reason: The assessment of valvular closure (S1 and S2) and the detection of turbulent blood flow, known as murmurs, are primary functions of auscultation. While very loud murmurs can sometimes be felt as vibrations called thrills, the definitive characterization of heart sounds and their timing within the cardiac cycle requires a stethoscope.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Dullness on percussion is indicative of increased tissue density or fluid, such as in lobar pneumonia, a pleural effusion, or a solid tumor. Bronchial breath sounds heard in the periphery also suggest consolidation. In a pneumothorax, the pleural space is filled with air rather than fluid or solid mass, making these findings inconsistent with the pathology.
Choice B reason: A pneumothorax involves the accumulation of air in the pleural space, which causes the underlying lung to collapse. On percussion, this excess air produces hyperresonance, a lower-pitched, booming sound. Because the lung is collapsed and separated from the chest wall by an air pocket, breath sounds are significantly diminished or entirely absent upon auscultation.
Choice C reason: Resonance is the characteristic sound of healthy, air-filled lung tissue during percussion. Wheezing is an adventitious sound caused by airway narrowing, typically associated with reactive airway diseases like asthma or COPD. Since a pneumothorax represents a structural collapse rather than simple airway constriction, normal resonance would not be present over the affected area.
Choice D reason: Tympany is a high-pitched, drum-like sound normally heard over air-filled viscera like the stomach, but it is not a standard finding over the thorax. Fine crackles are typically associated with the opening of collapsed alveoli due to fluid, as seen in heart failure or interstitial lung disease, rather than a gross pleural air collection.
Correct Answer is B
Explanation
Choice A reason: The second intercostal space is the appropriate location for auscultating the aortic and pulmonic valves at the base of the heart, not the apex. Using the bell in this area is typically reserved for detecting low-pitched murmurs rather than the high-pitched S1 and S2 heart sounds.
Choice B reason: The apex of the heart, where the mitral valve is best heard, is located at the fifth intercostal space at the left midclavicular line. The diaphragm is the correct tool for this assessment because it is designed to pick up high-pitched sounds like S1 and S2.
Choice C reason: The fourth intercostal space along the left sternal border is the traditional site for auscultating the tricuspid valve. While closer to the apex than the second intercostal space, it does not provide the clearest acoustics for the apical impulse or mitral valve closure.
Choice D reason: The third intercostal space at the left sternal border, known as Erb's point, is a common site to hear both aortic and pulmonic murmurs. However, it is not the anatomical location of the apex, and the diaphragm is better utilized at the fifth intercostal space.
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