A nurse is teaching several newly licensed nurses about cardiac valve replacement. Which of the following should the nurse include in the teaching?

The aortic and mitral valves are the most commonly replaced valves.

Mitral valve insufficiency occurs during the diastolic phase of the cardiac cycle.

Inadequate closure of the tricuspid valve causes overload in the left ventricle.

Aortic stenosis increases right ventricular systolic pressure and decreases afterload.

Answer and Explanation

The Correct Answer is A

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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Correct Answer is C

Explanation

Answer: C

Rationale:

A) "I'm glad that I can work remotely from my computer. Prolonged use of a computer can strain the eyes, potentially interfering with the healing process after a retinal reattachment procedure. Clients are generally advised to limit screen time during recovery.

B) "I can't wait to be able to take a bath. Submerging the face in water, as during a bath, is discouraged postoperatively due to the risk of introducing bacteria into the eye and delaying healing. Clients are advised to stick to showers and avoid getting the affected eye wet.

C) "I get bored only being able to watch television. Watching television is usually permissible following retinal surgery, as it does not strain the eye excessively. This statement aligns with typical postoperative instructions.

D) "I will be relieved once I can drive myself to the store." Driving is contraindicated during the recovery phase due to potential visual disturbances and the need for the eye to heal properly. Clients are typically instructed to avoid driving until cleared by their ophthalmologist.

A. "Damage occurs from the penetrating object shattering the skull and causing an infection." B. "Damage to the brain is related to coup and contrecoup injuries." C. "Damage occurs from the penetrating injury causing leakage of cerebrospinal fluid." D. "Damage to the brain is related to the size, route, and rate of speed of the object entering the brain."

Correct Answer is D

Explanation

A) "Damage occurs from the penetrating object shattering the skull and causing an infection." While penetrating traumatic brain injuries can lead to skull fractures and subsequent infections, the primary mechanism of brain damage in these injuries is related to the direct impact of the penetrating object on brain tissue rather than the shattering of the skull.

B) "Damage to the brain is related to coup and contrecoup injuries." Coup and contrecoup injuries occur when the brain impacts the skull's interior surface due to rapid deceleration or acceleration, commonly seen in closed head injuries such as concussions. Penetrating traumatic brain injuries involve direct penetration of foreign objects into the brain tissue, and coup-contrecoup injuries are not typically associated with these types of injuries.

C) "Damage occurs from the penetrating injury causing leakage of cerebrospinal fluid." While penetrating injuries may result in cerebrospinal fluid leakage, this is not the primary mechanism through which they cause brain damage. Leakage of cerebrospinal fluid is more commonly associated with certain types of head trauma, such as skull fractures, rather than solely penetrating injuries.

D) "Damage to the brain is related to the size, route, and rate of speed of the object entering the brain." This statement is correct. The extent of brain damage in penetrating traumatic brain injuries depends on various factors, including the size, shape, and velocity of the penetrating object, as well as the route it takes through the brain tissue. Larger, faster-moving objects tend to cause more extensive damage, whereas smaller objects or those with slower velocities may cause more localized damage. Therefore, understanding these factors is crucial in assessing and managing patients with penetrating traumatic brain injuries.

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A nurse is teaching several newly licensed nurses about cardiac valve replacement. Which of the following should the nurse include in the teaching?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is D

Explanation

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