A nurse is reinforcing teaching to a client who has coronary artery disease. Which of the following statements should the nurse include in the teaching to explain the correlation between changes in the coronary arteries and manifestations that occur?
"Coronary arteries become more elastic causing the arteries to stretch as individuals age causing the heart not to receive enough oxygen."
"The heart and the coronary arteries weaken, leading to poor perfusion and resulting in angina."
"Manifestations occur due to dilation of coronary arteries with increased blood flow causing increased pressure."
"Coronary arteries decrease in diameter leading to insufficient blood, oxygen, and nutrients reaching the heart muscle."
The Correct Answer is D
A. While coronary arteries may change with age, the increased elasticity does not lead to insufficient oxygen; rather, it can affect their ability to respond to increased demand.
B. Weakening of the heart can contribute to heart failure but is not a direct explanation for how coronary artery disease causes angina.
C. Dilation of coronary arteries typically does not cause manifestations in coronary artery disease; instead, it is the narrowing (stenosis) that leads to issues.
D. Decreased diameter of the coronary arteries due to atherosclerosis is the primary issue in coronary artery disease, which leads to inadequate blood supply, oxygen, and nutrients to the heart muscle, causing symptoms like angina.
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Correct Answer is D
Explanation
A. Applying ice to the extremity is generally not recommended for DVT due to the risk of promoting vasoconstriction and worsening the condition; warm compresses are usually indicated instead.
B. There is no need to restrict oral fluids for a client with DVT unless there are other specific medical reasons; hydration is important.
C. Vasodilating medications are not standard treatment for DVT and may not be appropriate; anticoagulants are typically the primary treatment.
D. Monitoring platelet levels is important in managing DVT, especially when anticoagulants are used, to assess for potential complications such as heparin-induced thrombocytopenia (HIT), making this option correct.
Correct Answer is B
Explanation
A. The ascending tract of the spinal cord transmits sensory information to the brain, but it does not process it; processing occurs in the brain itself.
B. This statement accurately describes the function of the descending tracts, which carry motor commands from the central nervous system (CNS) to the muscles, facilitating movement.
C. Sensory receptors are located in various tissues throughout the body, including the skin, not just in the muscles.
D. Motor neurons are not found in the dermal layer; they are located in the spinal cord and the peripheral nervous system, where they innervate muscles.