The nurse is assessing a patient who reports a sudden onset of intermittent, crampy, colicky abdominal pain that "comes in waves". The patient has a medical history of Crohn's disease. The patient has projectile vomiting, and the nurse observes a foul-smelling fecal odor in the vomitus. The patient reports a decrease in urinary output and has dry mucous membranes. Based on the assessment findings, what complication is the patient most likely experiencing?