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Typology: Exams
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b. Hypertension c. Diabetes mellitus d. Viral hepatitis - correct answers ANS: B Renin is secreted when special cells in the distal convoluted tubule, called the macula densa, sense changes in blood volume and pressure. When the macula densa cells sense that blood volume, blood pressure, or blood sodium levels are low, renin is secreted. Renin then converts angiotensinogen into angiotensin I. This leads to a series of reactions that cause secretion of the hormone aldosterone. This hormone increases kidney reabsorption of sodium and water, increasing blood pressure, blood volume, and blood sodium levels. Inappropriate or excessive renin secretion is a major cause of persistent hypertension. Renin has no impact on Alzheimer disease, diabetes mellitus, or viral hepatitis.
and noting a blood urea nitrogen (BUN) of 35 mg/dL (12.5 mmol/L) and a serum creatinine of 1.0 mg/dL (88.4 mcmol/L). What collaborative care measure would the nurse recommend? a. Intravenous fluids b. Hemodialysis c. Fluid restriction d. Urine culture and sensitivity - correct answers ANS: A Normal BUN is 10 to 20 mg/dL (3.6 to 7.1 mmol/L). Normal creatinine is 0.6 to 1. mg/dL (53.0 to 106.1 mcmol/L) (males) or 0.5 to 1.1 mg/dL (44.2 to 97.2 mcmol/L) (females). Creatinine is more specific for kidney function than BUN, because BUN can be affected by several factors (dehydration, high-protein diet, and catabolism). This client9s creatinine is normal, which suggests a nonrenal cause for the elevated BUN. A common cause of increased BUN is dehydration, so the nurse would recommend giving the client more fluids, not placing the client on fluid restrictions. Hemodialysis is not an appropriate treatment for dehydration. The lab results do not indicate an infection; therefore, a urine culture and sensitivity are not appropriate.
Older African Americans have a greater age-related decrease in glomerular filtration rate when compared to other racial-ethnic groups. In addition, blood flow decreases and sodium excretion is less effective in older hypertensive African Americans. These changes make this group most at risk for kidney disease.
The AP should use the female icon for women who have not had a hysterectomy. This allows the scanner to subtract the volume of the uterus from readings. If a woman has had a hysterectomy, the AP should choose the male icon. The AP should explain the procedure to the client, apply gel to the scanning head and clean it after use, and take at least two readings.
essential that the nurse review preprocedure laboratory test results for anemia and coagulation problems.