A nurse is providing teaching to a group of clients about the changes that occur when clients experience cataracts. Which of the following statements should the nurse include in the teaching?

"Vision changes occur when pressure in the eye is increased due to a decrease of aqueous humor."

"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."

Answer and Explanation

The Correct Answer is C

A) "Vision changes occur when pressure in the eye is increased due to a decrease of aqueous humor." This statement describes a mechanism associated with glaucoma, not cataracts. In cataracts, vision changes occur due to the opacity or cloudiness of the lens, not changes in intraocular pressure.

B) "Vision changes occur when blood vessels leak fluid or blood under a portion of the retina." This statement describes a mechanism associated with retinal diseases like diabetic retinopathy, not cataracts. In cataracts, the lens becomes cloudy, affecting the passage of light through the eye.

C) "Vision changes occur when the cloudy lens alters the passage of light through the eye." This statement is correct. Cataracts cause the lens of the eye to become cloudy, which interferes with the passage of light through the eye. This results in vision changes such as blurred vision, glare, and difficulty seeing in low light conditions.

D) "Vision changes occur when retinal tissue pulls away from the blood vessels in the eye." This statement describes a mechanism associated with retinal detachment, not cataracts. In cataracts, the lens becomes opaque, but the retinal tissue remains intact.

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Correct Answer is B

Explanation

A. Muscular aches in the leg: Muscular aches in the leg are not typically indicative of an impending cardiac arrest. While leg pain or cramping can be associated with peripheral vascular disease or venous insufficiency, they are not specific signs of cardiac arrest.

B. Profound fatigue: Profound fatigue can be a warning sign of an impending cardiac arrest. Fatigue or weakness can result from inadequate blood flow to the heart muscle, which may occur prior to a cardiac event. Additionally, systemic effects of cardiovascular compromise can lead to generalized weakness and fatigue.

C. Severe headache: While severe headache can be associated with conditions such as hypertension or intracranial bleeding, it is not a typical manifestation of an impending cardiac arrest. Headaches may occur as a result of stress or anxiety related to the cardiac event, but they are not a direct warning sign of impending cardiac arrest.

D. Ringing in the ears: Ringing in the ears, also known as tinnitus, is not typically associated with an impending cardiac arrest. Tinnitus can result from various factors such as noise exposure, ear infections, or certain medications, but it is not considered a warning sign of impending cardiac arrest.

A. A decrease in systolic blood pressure greater than 10 mm Hg during inspiration B. A decrease in heart rate greater than 10/min when lying down C. An increase in diastolic blood pressure greater than 10 mm Hg during inspiration D. An increase in heart rate greater than 20/min when standing

Correct Answer is A

Explanation

A. A decrease in systolic blood pressure greater than 10 mm Hg during inspiration: Pulsus paradoxus is an exaggerated decrease in systolic blood pressure during inspiration. Normally, there is a slight decrease in systolic blood pressure during inspiration due to increased intrathoracic pressure and decreased venous return to the heart. However, in conditions such as cardiac tamponade or severe asthma exacerbations, the decrease in systolic blood pressure during inspiration is more pronounced (>10 mm Hg), indicating impaired cardiac output and decreased left ventricular filling during inspiration.

B. A decrease in heart rate greater than 10/min when lying down: This finding is not indicative of pulsus paradoxus. Pulsus paradoxus primarily refers to changes in systolic blood pressure during inspiration rather than alterations in heart rate when lying down.

C. An increase in diastolic blood pressure greater than 10 mm Hg during inspiration: This finding is not indicative of pulsus paradoxus. Pulsus paradoxus is characterized by an exaggerated decrease in systolic blood pressure during inspiration, not changes in diastolic blood pressure.

D. An increase in heart rate greater than 20/min when standing: This finding is not indicative of pulsus paradoxus. Pulsus paradoxus primarily refers to changes in systolic blood pressure during inspiration rather than alterations in heart rate when standing.

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A nurse is providing teaching to a group of clients about the changes that occur when clients experience cataracts. Which of the following statements should the nurse include in the teaching?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is providing teaching to a client about recognizing manifestations of an impending cardiac arrest. Which of the following manifestations should the nurse include in the teaching?

Correct Answer is B

Explanation

A nurse is assessing a client suspected of having cardiac tamponade. Which of the following findings indicates the presence of pulsus paradoxus?

Correct Answer is A

Explanation

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