A patient is admitted for acute renal failure and the nurse is monitoring their response to medications. Which pharmacokinetic principle does the nurse understand will most likely be affected in this patient?
Elimination
Metabolism
Distribution
Absorption
The Correct Answer is A
Choice A reason: Elimination is the process of removing a drug from the body, usually through the kidneys or the liver. Acute renal failure is a condition where the kidneys suddenly lose their ability to filter waste products and excess fluid from the blood. This can impair the elimination of drugs that are mainly excreted by the kidneys, leading to increased drug levels and potential toxicity. The nurse should monitor the patient's renal function and adjust the dose of drugs that are renally eliminated.
Choice B reason: Metabolism is the process of transforming a drug into one or more metabolites, usually by enzymes in the liver. Acute renal failure does not directly affect the metabolism of drugs, unless it causes liver damage or alters the blood flow to the liver. The nurse should monitor the patient's liver function and the levels of drugs that are metabolized by the liver.
Choice C reason: Distribution is the process of transferring a drug from the blood to the tissues and organs of the body. Acute renal failure can affect the distribution of drugs that are bound to plasma proteins, such as albumin. When the kidneys are damaged, they may leak protein into the urine, causing hypoalbuminemia (low levels of albumin in the blood). This can increase the amount of free or unbound drug in the blood, which may enhance the drug's effect or cause adverse reactions. The nurse should monitor the patient's serum albumin level and the effects of drugs that are highly protein bound.
Choice D reason: Absorption is the process of moving a drug from the site of administration to the bloodstream. Acute renal failure does not directly affect the absorption of drugs, unless it causes changes in the gastrointestinal tract, such as edema, bleeding, or motility disorders. The nurse should monitor the patient's gastrointestinal function and the bioavailability of drugs that are administered orally.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B"]
Explanation
Choice A reason: Age is a non-modifiable risk factor for hypertension because the risk of high blood pressure increases as we get older. This is due to changes in the heart and blood vessels, such as loss of elasticity and stiffening of the arteries, that affect the blood flow and pressure. ¹
Choice B reason: Genetics is a non-modifiable risk factor for hypertension because some people inherit genes that make them more likely to develop high blood pressure. For example, people of African and Black Caribbean descent have a higher risk of hypertension due to genetic variations that affect salt sensitivity and blood vessel function. ²
Choice C reason: Smoking is a modifiable risk factor for hypertension because it can be changed or avoided by quitting tobacco use. Smoking damages the blood vessels and increases the risk of atherosclerosis, which is the buildup of plaque in the arteries that narrows them and raises blood pressure. Smoking also lowers the level of good cholesterol (HDL) and raises the level of bad cholesterol (LDL) and triglycerides, which are fats in the blood that contribute to plaque formation. ³
Choice D reason: Obesity is a modifiable risk factor for hypertension because it can be changed or prevented by losing weight or maintaining a healthy weight. Obesity increases the risk of high blood pressure by putting extra strain on the heart and blood vessels, as well as by causing hormonal and metabolic changes that affect blood pressure regulation. Obesity is also associated with other conditions that can raise blood pressure, such as diabetes, sleep apnea, and kidney disease. ⁴
Choice E reason: Sedentary lifestyle is a modifiable risk factor for hypertension because it can be changed or improved by increasing physical activity. Sedentary lifestyle increases the risk of high blood pressure by reducing the ability of the blood vessels to dilate and contract, as well as by increasing the risk of obesity, diabetes, and high cholesterol. Physical activity helps to lower blood pressure by improving blood flow, strengthening the heart muscle, and lowering body weight and stress levels. .
Correct Answer is B
Explanation
This choice is correct because it is the result of dividing the ordered dose (0.25 mg) by the strength of the tablet (250 mcg or 0.25 mg). The formula for calculating the number of tablets to be given is:
Tablets = Dose/ Strength
Therefore, the number of tablets to be given is:
Tablets = 0.25 mg/250 mcg = 0.25 mg/0.25 mg = 1
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