A nurse is performing the diagnostic positions test. The nurse recognizes that normal findings from the diagnostic positions test should be which of these results?
Lid lag when moving the eyes from a superior to an inferior position
Nystagmus when reading the Snellen chart
Parallel movement of both eyes
Convergence of the eyes
The Correct Answer is C
A) Lid lag when moving the eyes from a superior to an inferior position:
This is incorrect. Lid lag refers to a delay in the movement of the eyelid as the eyes move downward. It is considered an abnormal finding and is often associated with conditions like hyperthyroidism (Graves' disease), where the eyelid does not follow the downward gaze appropriately. In the diagnostic positions test, normal eye movement should not include lid lag.
B) Nystagmus when reading the Snellen chart:
This is incorrect. Nystagmus is an involuntary, rhythmic oscillation of the eyes, which can be indicative of a neurological or vestibular issue. It is not a normal finding during the diagnostic positions test. Nystagmus may be seen with certain disorders, such as vestibular dysfunction, neurologic damage, or alcohol intoxication, but it should not occur as a normal response to eye movement during the diagnostic positions test.
C) Parallel movement of both eyes:
This is the correct answer. In a normal result of the diagnostic positions test, both eyes should move in parallel and remain aligned during all directions of gaze. The purpose of this test is to assess for any eye muscle weakness or cranial nerve dysfunction that might cause misalignment, such as strabismus or a disorder affecting the extraocular muscles. If both eyes track smoothly and simultaneously without deviation or lag, this is a normal and expected finding.
D) Convergence of the eyes:
This is incorrect. While convergence (the inward movement of both eyes toward the nose) is a normal response when focusing on a near object, it is not the specific goal of the diagnostic positions test. The diagnostic positions test is primarily concerned with assessing the ability of the eyes to move together in all directions of gaze without misalignment or abnormal movement. While convergence is a sign of normal eye function, it is not the primary focus of this particular test.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A) These sounds are normally auscultated over the trachea:
This is incorrect. The tracheal breath sounds are harsh, loud, and high-pitched, typically heard over the trachea and larynx. These characteristics differ from the soft, low-pitched sounds described in the question, which are more consistent with vesicular breath sounds.
B) These are bronchial breath sounds and normal in that location:
This is incorrect. Bronchial breath sounds are typically heard over the trachea and larynx, not the lower lobes of the lungs. Bronchial sounds are loud, high-pitched, and have a longer expiration phase compared to inspiration, unlike the low-pitched, soft sounds with longer inspiration that are heard in the lower lobes.
C) These are bronchovesicular breath sounds and normal in that location:
This is incorrect. Bronchovesicular breath sounds are a mix of bronchial and vesicular sounds, with inspiration and expiration of about equal duration. They are typically heard over the major bronchi, near the sternum and between the scapulae, rather than over the posterior lower lobes. The description in the question suggests vesicular breath sounds, which have a longer inspiration phase.
D) These are vesicular breath sounds and normal in that location:
This is the correct answer. Vesicular breath sounds are soft, low-pitched, and typically heard over the peripheral lung fields, including the posterior lower lobes. These sounds have a longer inspiration phase than expiration and are considered normal in this location. The description in the question fits the characteristics of vesicular breath sounds perfectly.
Correct Answer is D
Explanation
A) A heart murmur is a high-pitched sound caused by a narrowing of a heart valve:
While it's true that a narrowing of a heart valve (stenosis) can cause a murmur, the description of a heart murmur as a "high-pitched sound" due to this narrowing is overly specific and does not fully explain what a murmur is. A murmur is not always high-pitched, and it is caused by turbulent blood flow, which may occur for various reasons beyond just valve stenosis.
B) A heart murmur is an extra sound heard from blood entering a rigid heart chamber:
This description is somewhat inaccurate. While murmurs can result from turbulent blood flow through the heart chambers or valves, the idea that murmurs are "extra sounds from blood entering a rigid heart chamber" is misleading. A murmur occurs when there is turbulent blood flow, which can happen in both rigid and non-rigid chambers. The key point is that it's the turbulent flow, not just rigidity, that causes the sound.
C) A heart murmur is a sound generated by inflammation around the heart muscle:
This is incorrect. Inflammation around the heart muscle, such as in pericarditis, can cause chest pain or other symptoms but does not generate a heart murmur. A murmur is caused by turbulent blood flow, which can result from various heart valve issues (e.g., stenosis, regurgitation) or defects in the heart's structure (e.g., septal defects), not from inflammation around the heart muscle.
D) A heart murmur indicates turbulent blood flow through a valve in the heart:
This is the most accurate description. A heart murmur is typically caused by turbulent or irregular blood flow through a heart valve. This can occur for several reasons, such as valve stenosis (narrowing), valve regurgitation (leakage), or congenital heart defects that cause abnormal flow patterns. The turbulent flow disrupts the normal laminar (smooth) blood flow, creating the characteristic sound that can be heard with a stethoscope. Murmurs can vary in timing, pitch, and intensity depending on the nature of the flow disturbance.
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