A nurse is performing an examination of a client's anterior thorax. The nurse should recall that the trachea bifurcates anteriorly at which location?
Suprasternal notch
Xiphoid process
Costal angle
Sternal angle
The Correct Answer is D
A) Suprasternal notch:
This is incorrect. The suprasternal notch is a depression located at the top of the sternum, just above the manubrium. While this is an important landmark for palpating the trachea and assessing other structures in the thoracic region, it is not the point where the trachea bifurcates.
B) Xiphoid process:
This is incorrect. The xiphoid process is the small, pointed lower portion of the sternum. It is located at the inferior end of the sternum and does not play a role in the bifurcation of the trachea. The trachea bifurcates much higher in the thoracic region.
C) Costal angle:
This is incorrect. The costal angle is formed by the meeting of the costal margins of the ribs at the lower end of the ribcage. While it is an important anatomical landmark, it is not related to the bifurcation of the trachea.
D) Sternal angle:
This is the correct answer. The sternal angle (also known as the angle of Louis) is located at the junction between the manubrium and the body of the sternum, approximately at the level of the second rib. This is the anatomical landmark where the trachea bifurcates into the right and left mainstem bronchi, usually around the level of the T4 to T5 vertebrae. It is an important reference point during respiratory assessments.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A) The presence of cerumen in the ear canal:
This is incorrect. The presence of cerumen (earwax) in the ear canal is not inherently abnormal. In fact, cerumen is a natural substance produced by the body to protect and clean the ear canal. While excessive buildup can lead to blockages or hearing impairment, some amount of cerumen is normal and does not indicate an abnormal finding.
B) A shiny, pearly white color tympanic membrane:
This is incorrect. A shiny, pearly white tympanic membrane is a normal finding. This color and appearance indicate a healthy, intact eardrum. The tympanic membrane should be translucent with a smooth surface and this typical pearly appearance in a healthy ear.
C) A clear presence of a cone of light:
This is incorrect. The cone of light is a normal finding during otoscopic examination. It is a reflection of the otoscope light off the tympanic membrane and should be visible in the anterior-inferior quadrant of the tympanic membrane. The presence of the cone of light suggests that the eardrum is intact and in a normal position.
D) A yellow or amber color to the tympanic membrane:
This is the correct answer. A yellow or amber color of the tympanic membrane suggests the presence of fluid behind the eardrum, which may indicate an ear infection or otitis media. This color change is considered abnormal and should prompt further investigation, as it can be a sign of inflammation, infection, or the accumulation of fluid in the middle ear.
Correct Answer is A
Explanation
A) II:
This is the correct answer. The optic nerve (cranial nerve II) is responsible for visual acuity, as it transmits visual information from the retina to the brain. When assessing visual acuity, the nurse is evaluating the function of the optic nerve, which is responsible for the sense of vision. Therefore, cranial nerve II should be assessed during a visual acuity exam.
B) I:
This is incorrect. The olfactory nerve (cranial nerve I) is responsible for the sense of smell, not vision. Visual acuity is not related to the olfactory nerve, so it is not involved in this type of assessment.
C) VI:
This is incorrect. The abducens nerve (cranial nerve VI) controls the lateral rectus muscle of the eye, which is responsible for outward eye movement. While cranial nerve VI plays a role in eye movement, it is not directly involved in measuring visual acuity, which pertains to the function of the optic nerve.
D) IV:
This is incorrect. The trochlear nerve (cranial nerve IV) controls the superior oblique muscle, which helps with eye movement, specifically downward and inward eye movements. This nerve is not involved in measuring visual acuity.
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