A nurse is caring for a 65-year-old female client in the emergency department.
Select the landmarks that are used to find the PMI to auscultate the apical pulse.
Angle of Louis
Second intercostal space
Fifth intercostal space
Left midclavicular line
Sternum
Correct Answer : A,B,C,D
Choice A rationale: The angle of Louis, or the sternal angle, is an important anatomical landmark located at the junction of the manubrium and body of the sternum. It helps locate the second rib and second intercostal space, providing a starting point for counting ribs and spaces to identify the correct level for PMI assessment.
Choice B rationale: The second intercostal space lies just below the second rib, identified by palpating down from the angle of Louis. It is the reference point used to count down to the fifth intercostal space where the PMI is located, enabling accurate localization of cardiac landmarks during auscultation.
Choice C rationale: The fifth intercostal space is the level where the PMI is typically found. This space lies below the fourth rib and corresponds to the apex of the heart in most adults. Locating this space is essential for accurate auscultation of the apical pulse.
Choice D rationale: The left midclavicular line is a vertical line drawn down from the midpoint of the left clavicle. The PMI is most often located at the intersection of the fifth intercostal space and this line, making it a critical landmark for cardiac examination.
Choice E rationale: The sternum itself is a midline bone and not used directly to locate the PMI. While it provides structural support and serves as a reference for the angle of Louis, it is not a landmark for auscultating the apical impulse, which is lateral to the sternum.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Obtaining a pulse oximeter reading from two extremities assesses peripheral perfusion and oxygen saturation, providing data on systemic oxygen delivery. This action is unrelated to identifying an extra heart sound, which originates from cardiac mechanics and blood flow dynamics within the heart's chambers and valves.
Choice B rationale
The bell of the stethoscope is designed to optimally transmit low-frequency sounds due to its larger surface area and lighter pressure application. Extra heart sounds, such as S3 or S4 gallops or certain murmurs, are typically low-pitched and therefore best appreciated with the bell, allowing for clearer differentiation from normal heart sounds.
Choice C rationale
Auscultating for one minute with the diaphragm primarily transmits high-frequency sounds due to its taut membrane and firm application. While useful for normal heart sounds (S1, S2) and high-pitched murmurs, it may obscure or poorly transmit the low-frequency characteristics of most extra heart sounds, leading to their non-detection.
Choice D rationale
Using a Doppler ultrasound primarily detects blood flow and its direction, often used to assess peripheral pulses or vascular patency. While it can detect cardiac motion, it does not provide the nuanced auditory information necessary to differentiate and characterize specific extra heart sounds based on their timing, pitch, and quality within the cardiac cycle.
Correct Answer is A
Explanation
Choice A rationale
The presence of metal implants, such as pacemakers, aneurysm clips, or prosthetic joints, is a critical contraindication for MRI due to the strong magnetic field. The magnetic forces can dislodge implants or cause burns, posing significant patient risk.
Choice B rationale
While NPO status is relevant for some diagnostic procedures, it is generally not a universal requirement for an MRI of the head and neck unless sedation or contrast agents are used that necessitate it. The primary concern for MRI is magnetic field interaction.
Choice C rationale
Allergy to iodine-based dyes is a crucial consideration for procedures involving iodinated contrast media, such as CT scans or angiography. MRI commonly uses gadolinium-based contrast agents, which have different allergenicity profiles.
Choice D rationale
A history of myelogram, which involves injecting contrast into the spinal canal, is relevant for procedures affecting the spine, but it is not a direct contraindication or primary concern for a head and neck MRI unless residual contrast is present.
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