A nurse is providing teaching to a group of clients about changes that occur when clients experience open-angle glaucoma. Which of the following statements should the nurse include in the teaching?
"Vision changes occur when blood vessels leak fluid or blood under a portion of the retina."
"Vision changes occur when the cloudy lens alters the passage of light through the eye."
"Vision changes occur when retinal tissue pulls away from the blood vessels in the eye."
"Vision changes occur when pressure in the eye is increased due to a decrease of aqueous humor."
The Correct Answer is D
A. "Vision changes occur when blood vessels leak fluid or blood under a portion of the retina": This statement describes a symptom of diabetic retinopathy, not open-angle glaucoma. In open-angle glaucoma, vision changes primarily result from increased intraocular pressure (IOP) due to impaired drainage of aqueous humor, not leakage of fluid or blood under the retina.
B. "Vision changes occur when the cloudy lens alters the passage of light through the eye": This statement describes a symptom of cataracts, not open-angle glaucoma. Cataracts involve clouding of the lens inside the eye, which affects the passage of light and leads to visual disturbances. Open-angle glaucoma, however, primarily affects the optic nerve and visual field due to increased intraocular pressure.
C. "Vision changes occur when retinal tissue pulls away from the blood vessels in the eye": This statement describes a symptom of retinal detachment, not open-angle glaucoma. Retinal detachment occurs when the retina detaches from the underlying layers of the eye, leading to vision changes and potentially vision loss. Open-angle glaucoma, on the other hand, primarily involves increased intraocular pressure and optic nerve damage.
D. "Vision changes occur when pressure in the eye is increased due to a decrease of aqueous humor": This statement is accurate. In open-angle glaucoma, vision changes occur due to increased intraocular pressure resulting from inadequate drainage of aqueous humor from the eye. This increased pressure can lead to damage of the optic nerve, resulting in peripheral vision loss and potentially blindness if left untreated.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Pericardiocentesis: Pericardiocentesis is a procedure used to drain fluid from the pericardial sac, typically performed in cases of pericardial effusion or cardiac tamponade. It is not indicated for the treatment of hypertrophic cardiomyopathy (HCM), which involves structural abnormalities of the heart muscle rather than pericardial fluid accumulation.
B. Septal myectomy: Septal myectomy is a surgical procedure performed to treat hypertrophic obstructive cardiomyopathy (HOCM), a subtype of hypertrophic cardiomyopathy characterized by thickening of the interventricular septum and dynamic left ventricular outflow tract obstruction. Septal myectomy involves the surgical removal of a portion of the hypertrophied septum to relieve left ventricular outflow tract obstruction and improve symptoms.
C. Pericardial window: A pericardial window is a surgical procedure used to create a communication between the pericardial sac and the pleural space, typically performed in cases of recurrent pericardial effusion or tamponade to prevent fluid re-accumulation. It is not indicated for the treatment of hypertrophic cardiomyopathy.
D. Synchronized electrical cardioversion: Synchronized electrical cardioversion is a procedure used to restore normal sinus rhythm in patients with certain types of cardiac arrhythmias, such as atrial fibrillation or atrial flutter. It is not typically indicated for the treatment of hypertrophic cardiomyopathy, although patients with HCM may develop arrhythmias as a complication.
Correct Answer is A
Explanation
A. The aortic and mitral valves are the most commonly replaced valves: This statement is accurate. The aortic and mitral valves are indeed the most commonly replaced valves in cardiac valve replacement surgeries. Aortic valve replacement is commonly performed for conditions such as aortic stenosis or regurgitation, while mitral valve replacement is often indicated for mitral regurgitation or stenosis.
B. Mitral valve insufficiency occurs during the diastolic phase of the cardiac cycle: This statement is incorrect. Mitral valve insufficiency, also known as mitral regurgitation, occurs during the systolic phase of the cardiac cycle. It involves the backflow of blood from the left ventricle into the left atrium during ventricular systole, leading to volume overload of the left atrium and potentially causing symptoms such as dyspnea and fatigue.
C. Inadequate closure of the tricuspid valve causes overload in the left ventricle: This statement is incorrect. Inadequate closure of the tricuspid valve leads to regurgitation of blood from the right ventricle back into the right atrium during ventricular systole. This condition, known as tricuspid regurgitation, causes volume overload in the right atrium and ventricle, rather than overload in the left ventricle.
D. Aortic stenosis increases right ventricular systolic pressure and decreases afterload: This statement is partially correct. Aortic stenosis indeed increases left ventricular systolic pressure and decreases afterload, not right ventricular pressure. The increased afterload on the left ventricle can lead to left ventricular hypertrophy and eventually heart failure. However, aortic stenosis does not directly affect right ventricular systolic pressure.
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