Which factors may contribute to hypertension? (Select All that Apply.)
Decreased stimulation of the sympathetic nervous system (SNS).
Decreased elasticity of blood vessels.
Increased peripheral vascular resistance (PVR).
Decreased fluid volume.
Increased blood viscosity.
Correct Answer : B,C,E
(A) Decreased stimulation of the sympathetic nervous system (SNS): The sympathetic nervous system (SNS) plays a key role in regulating blood pressure. When the SNS is stimulated, it causes vasoconstriction, or narrowing of the blood vessels, which increases blood pressure. Therefore, decreased stimulation of the SNS would typically lead to vasodilation, or widening of the blood vessels, which would lower blood pressure, not increase it.
(B) Decreased elasticity of blood vessels: As people age, their blood vessels can lose elasticity, which can lead to hypertension. When blood vessels are elastic, they can easily expand and contract with each heartbeat, maintaining a healthy blood pressure. But when they become stiff or rigid, they can’t expand as easily, causing the pressure inside to increase.
(c) Increased peripheral vascular resistance (PVR): Peripheral vascular resistance is the resistance that blood must overcome to flow through the blood vessels. The more resistance, the harder the heart has to work to pump blood through the body, which can lead to increased blood pressure. Factors that can increase PVR include vasoconstriction, or narrowing of the blood vessels, and increased blood viscosity, or thickness.
(D) Decreased fluid volume: Decreased fluid volume, or hypovolemia, would typically lead to a decrease in blood pressure, not an increase. This is because blood pressure is directly related to the volume of blood in the blood vessels. When there’s less blood, the pressure inside the blood vessels is usually lower.
(E) Increased blood viscosity: Blood viscosity refers to the thickness of the blood. When blood is thicker, it’s harder for it to flow through the blood vessels, which increases the resistance to blood flow, leading to increased blood pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. "I will take my warfarin with a glass of water the night before my surgery":
This statement indicates a need for further teaching. Warfarin is an anticoagulant medication, and it should typically be discontinued or adjusted before surgery to reduce the risk of excessive bleeding. Taking it the night before surgery could increase the risk of bleeding during the procedure.
B. "I understand what risks I can expect with this surgery":
This statement suggests that the client has received information about the risks associated with the surgery, which is an essential component of preoperative education. There is no indication for further teaching based on this statement.
C. "I will take time to relax if I get nervous the night before surgery":
This statement demonstrates the client's awareness of the importance of managing stress and anxiety before surgery, which is a positive coping strategy. There is no need for further teaching based on this statement.
D. "I will have a glass of water the morning of my surgery":
This statement is generally acceptable. Clear fluids may be allowed up to a certain time before surgery, depending on the facility's protocol. However, specific instructions regarding fasting before surgery should be clarified with the healthcare provider or surgical team to ensure adherence to preoperative guidelines.
Correct Answer is D
Explanation
A. Insert the IV catheter:
Inserting an IV catheter is necessary to administer IV fluids and medications. However, it is not the most immediate need. The priority is to address the client's oxygenation status first to stabilize them before proceeding with other interventions.
B. Obtain a blood sample:
Obtaining a blood sample for cardiac enzyme levels is important to diagnose a myocardial infarction. Nevertheless, this step should be taken after ensuring the client is receiving adequate oxygen, as hypoxia needs to be addressed immediately.
C. Attach the leads for a 12-lead ECG:
Attaching the leads for a 12-lead ECG is crucial for diagnosing the client's cardiac condition. However, it should be done after initiating oxygen therapy, as improving the client's oxygenation status is more urgent and can help stabilize the client for further diagnostic procedures.
D. Initiate oxygen therapy:
Initiating oxygen therapy is the most critical first action. The client is experiencing severe chest pain, shortness of breath, and signs of cyanosis, indicating that their oxygen levels are insufficient. Providing oxygen at 4 L/min via nasal cannula will help alleviate hypoxia, improve the client's condition, and provide time for further diagnostic and therapeutic interventions.
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