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A nurse is caring for a patient who had a gastric bypass procedure 2 days ago. A physician has ordered a gastric tube to be placed due to increased abdominal distention. The nurse realizes that this procedure will most likely need to be done
Which of the following is the most common prerenal cause of acute tubular necrosis?
Shock is the most common prerenal cause of acute tubular necrosis (ATN). In the context of prerenal conditions, shock leads to decreased renal perfusion and subsequent ischemia, which can cause damage to the renal tubules. Other options such as blood transfusion reaction, crush injury, and beta-hemolytic streptococcal infection can lead to renal damage but are not the most common prerenal causes of ATN. Reference: CCRN Exam Handbook, AACN, page 28, section on Renal/GU.
A patient with a sodium level of 114 mEq/L is most likely to develop
A patient with a sodium level of 114 mEq/L is most likely to develop seizures, which are a manifestation of severe hyponatremia and cerebral edema. Hyponatremia is a low level of sodium in the blood, which can cause water to move into the brain cells and cause them to swell. This can lead to increased intracranial pressure, neurological dysfunction, and seizures. Seizures are a medical emergency and require prompt treatment to prevent brain damage or death. Tetany, flaccid paralysis, and cardiac arrhythmias are not typical signs of hyponatremia, but may occur in other electrolyte disorders, such as hypocalcemia, hyperkalemia, or hypokalemia.
Overview of the treatment of hyponatremia in adults - UpToDate1, p. 1-2.
Manifestations of hyponatremia and hypernatremia in adults - UpToDate2, p. 1-2.
A caloric irrigation test of the oculovestibular reflex is performed on a patient who is comatose following a hypoxic brain injury. When cold water is introduced into the left ear, nystagmus occurs with slow deviation of the eyes toward the left, followed by faster eye deviation to the right. This pattern is indicative of a
The caloric irrigation test, also known as the oculovestibular reflex test, is used to assess brainstem function in patients, especially those who are comatose. In this test, cold water is introduced into the ear canal, which should induce a predictable response if the brainstem is intact. The normal response to cold water irrigation is nystagmus with slow deviation of the eyes toward the side of the cold water (in this case, the left) and a fast phase of eye movement (nystagmus) away from the side of the cold water (to the right). This indicates that the brainstem pathways are functioning properly. Reference: =
Adult CCRN/CCRN-E/CCRN-K Certification Review Course Online. AACN
