Chapter 16: Fluid, Electrolyte, and Acid-Base Imbalances Lewis: Medical-Surgical Nursing, 10th Edition questions and answers

1. The nurse is caring for a patient with a massive burn injury and possible hypovolemia. Which assessment data will be of most concern to the nurse? a. Urine output is 30 mL/hr. b. Blood pressure is 90/40 mm Hg. c. Oral fluid intake is 100 mL for the past 8 hours. d. There is prolonged skin tenting over the sternum. ANS: B The blood pressure indicates that the patient may be developing hypovolemic shock as a result of intravascular fluid loss because of the burn injury. This finding will require immediate intervention to prevent the complications associated with systemic hypoperfusion. The poor oral intake, decreased urine output, and skin tenting all indicate the need for increasing the patient’s fluid intake but not as urgently as the hypotension. DIF: Cognitive Level: Analyze (analysis) REF: 276 TOP: Nursing Process: Assessment MSC: NCLEX: Physiological Integrity 2. A patient who has a small cell carcinoma of the lung develops syndrome of inappropriate antidiuretic hormone (SIADH). The nurse should notify the health care provider about which assessment finding? a. Serum hematocrit of 42% b. Serum sodium level of 120 mg/dL c. Reported weight gain of 2.2 lb (1 kg) d. Urinary output of 280 mL during past 8 hours ANS: B Hyponatremia is the most important finding to report. SIADH causes water retention and a decrease in serum sodium level. Hyponatremia can cause confusion and other central nervous system effects. A critically low value likely needs to be treated. At least 30 mL/hr of urine output indicates adequate kidney function. The hematocrit level is normal. Weight gain is expected with SIADH because of water retention. DIF: Cognitive Level: Apply (application) REF: 279 TOP: Nursing Process: Assessment MSC: NCLEX: Physiological Integrity 3. A patient with multiple draining wounds is admitted for hypovolemia. Which assessment would be the most accurate way for the nurse to evaluate fluid balance? a. Skin turgor c. Urine output b. Daily