Pt has respiratory acidosis (low blood pH) due to his asthma exacerbation. What will the nurse expect to see?
No change in affinity of hemoglobin with oxygen
Decrease in affinity of hemoglobin with oxygen
Increase in affinity of hemoglobin with oxygen
Decrease in blood CO2
The Correct Answer is B
Choice A reason: Respiratory acidosis does not cause no change in affinity of hemoglobin with oxygen. It causes a decrease in affinity of hemoglobin with oxygen, which means that hemoglobin releases more oxygen to the tissues. This is known as the Bohr effect, which is a physiological response to low pH and high CO2 levels.
Choice B reason: Respiratory acidosis causes a decrease in affinity of hemoglobin with oxygen, which means that hemoglobin releases more oxygen to the tissues. This is the correct statement that describes the expected finding in this patient. The decrease in affinity of hemoglobin with oxygen is a compensatory mechanism that tries to restore the oxygen balance in the body.
Choice C reason: Respiratory acidosis does not cause an increase in affinity of hemoglobin with oxygen. It causes a decrease in affinity of hemoglobin with oxygen, which means that hemoglobin releases more oxygen to the tissues. An increase in affinity of hemoglobin with oxygen would mean that hemoglobin holds on to oxygen more tightly, which would worsen the hypoxia in the patient.
Choice D reason: Respiratory acidosis does not cause a decrease in blood CO2. It causes an increase in blood CO2, which is the primary cause of the low pH. A decrease in blood CO2 would indicate respiratory alkalosis, which is a condition of high pH and low CO2 levels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: This is not what will happen when a person is hypotensive. Baroreceptors are sensory receptors that detect changes in blood pressure. When a person is hypotensive, the baroreceptors are more active, not less, and they send signals to the brain to increase the blood pressure.
Choice B reason: This is what will happen when a person is hypotensive. SNS stands for sympathetic nervous system, which is the part of the autonomic nervous system that prepares the body for fight or flight response. When a person is hypotensive, the SNS is activated to increase the heart rate, contractility, and vasoconstriction, which all raise the blood pressure.
Choice C reason: This is not what will happen when a person is hypotensive. Person will be bradycardic means that the person will have a slow heart rate, usually below 60 beats per minute. When a person is hypotensive, the opposite will happen, as the heart rate will increase to compensate for the low blood pressure.
Choice D reason: This is not what will happen when a person is hypotensive. SNS is suppressed means that the sympathetic nervous system is inhibited or reduced in activity. When a person is hypotensive, the SNS is not suppressed, but rather stimulated, to increase the blood pressure.
Correct Answer is C
Explanation
Choice A reason: This is not an adverse effect of ACE inhibitors. Constipation is a common side effect of opioid medications, which slow down the intestinal motility and cause hard stools.
Choice B reason: This is not an adverse effect of ACE inhibitors. Hypokalemia is a low level of potassium in the blood, which can be caused by diuretic medications, such as furosemide or hydrochlorothiazide, which increase the urine output and potassium excretion.
Choice C reason: This is an adverse effect of ACE inhibitors. Chronic cough is a dry, persistent cough that occurs in some patients taking ACE inhibitors, due to the accumulation of bradykinin, a substance that causes inflammation and irritation in the respiratory tract.
Choice D reason: This is not an adverse effect of ACE inhibitors. Nervousness is a common side effect of stimulant medications, such as caffeine or amphetamine, which increase the activity of the central nervous system and cause anxiety, agitation, and insomnia.
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