What is the primary pathophysiology of glaucoma?
Blockage of the tear ducts causing excessive tearing.
Inflammation of the cornea resulting in blurry vision.
Increased intraocular pressure (IOP) leading to optic nerve damage.
Degeneration of the lens leading to cataracts.
The Correct Answer is C
A) Blockage of the tear ducts causing excessive tearing:
Blockage of tear ducts (dacryostenosis) results in excessive tearing (epiphora) due to inadequate drainage of tears into the nasal cavity. It does not directly contribute to glaucoma, which primarily involves increased intraocular pressure (IOP) and optic nerve damage.
B) Inflammation of the cornea resulting in blurry vision:
Corneal inflammation (keratitis) can cause blurry vision, pain, and sensitivity to light, but it is not the primary pathophysiology of glaucoma. Glaucoma primarily involves damage to the optic nerve due to elevated IOP.
C) Increased intraocular pressure (IOP) leading to optic nerve damage:
Glaucoma is characterized by elevated IOP, which puts pressure on the optic nerve and can lead to progressive damage and vision loss if untreated. This is the primary pathophysiological process in most types of glaucoma.
D) Degeneration of the lens leading to cataracts:
Cataracts involve the clouding of the lens of the eye, leading to visual impairment. While cataracts are a common condition in older adults, they are not directly related to the pathophysiology of glaucoma, which primarily involves elevated IOP and optic nerve damage.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The Body Mass Index (BMI) is calculated using the formula:
BMI = weight(kg) / height(m)2
First, we need to convert the height from feet and inches to meters.
There are approximately 0.3048 meters in a foot and 0.0254 meters in an inch.
So, 5 feet 5 inches is approximately 1.65 meters.
Substituting the given values into the formula:
BMI = 60 / (1.65)2
This gives us a BMI of approximately 22 when rounded to the nearest whole number.
Therefore, the correct answer is 22 BMI.
Correct Answer is A
Explanation
A. Mucous Membranes:
In clients with dark skin, mucous membranes such as the lips, tongue, and gums are the best sites to assess for cyanosis. These areas have less pigmentation and are more vascular, allowing for a more accurate evaluation of oxygenation and the presence of cyanosis.
B. Dorsal surface of the hand:
The dorsal surface of the hand can be used to assess for cyanosis in lighter-skinned individuals, but it is less reliable in dark-skinned clients due to the higher melanin content, which can obscure the bluish tint indicative of cyanosis.
C. Dorsal surface of the foot:
Similar to the dorsal surface of the hand, the dorsal surface of the foot is not an ideal site for assessing cyanosis in clients with dark skin. The presence of melanin can make it difficult to detect changes in skin color.
D. Pinnae of the ears:
The pinnae of the ears are also not the best sites for assessing cyanosis in dark-skinned clients. These areas can be highly pigmented, which can mask the bluish discoloration associated with cyanosis. The mucous membranes remain the most reliable site for this assessment.
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