The nurse is caring for a client with diverticulitis who presents with fever and acute lower left quadrant abdominal pain. Which pathophysiologic mechanism supports the client’s clinical presentation?

Choice A reason: An incompetent lower esophageal sphincter causes GERD, leading to heartburn, not lower left quadrant pain or fever. Diverticulitis involves inflamed intestinal outpouchings, unrelated to esophageal function. This choice is incorrect, as it does not explain the client’s abdominal and systemic symptoms.

Choice B reason: Esophagitis from gastric reflux causes epigastric or chest pain, not lower left quadrant pain or fever. Diverticulitis results from inflamed diverticula in the colon, causing localized pain and infection. This choice is incorrect, as it misaligns with diverticulitis’s colorectal pathophysiology.

Choice C reason: A weakened diaphragm may cause hiatal hernia, leading to reflux symptoms, not lower left quadrant pain or fever. Diverticulitis involves colonic diverticula inflammation, unrelated to diaphragmatic issues. This choice is incorrect, as it does not account for the client’s localized abdominal presentation.

Choice D reason: Diverticulitis results from inflammation of diverticula, outpouchings at weak points in the intestinal wall, typically in the sigmoid colon. These become infected, causing lower left quadrant pain and fever. This mechanism directly supports the client’s presentation, aligning with gastrointestinal pathophysiology evidence.

Choice A reason: DIC involves widespread microthrombi formation and clotting factor consumption, leading to bleeding tendencies. Hematuria and hemoptysis reflect microvascular bleeding from depleted coagulation factors, common in sepsis-induced DIC. These findings align with DIC’s pathophysiology, where simultaneous clotting and hemorrhage occur, causing ecchymotic extremities, as seen in this client.

Choice B reason: Polyuria and productive cough are unrelated to DIC. Polyuria suggests renal or endocrine issues, and productive cough indicates respiratory infection. DIC causes bleeding and clotting abnormalities, not these symptoms. These findings do not support the pathophysiology of sepsis-induced DIC, which manifests as hemorrhagic tendencies like hematuria.

Choice C reason: Glucosuria and lethargy suggest diabetes or metabolic issues, not DIC. DIC involves coagulopathy, leading to bleeding or thrombosis, not glucose excretion or fatigue alone. These symptoms are unrelated to the microthrombi and bleeding diathesis of DIC, making them inconsistent with the client’s ecchymotic presentation.

Choice D reason: Frothy urine indicates proteinuria or renal disease, and anorexia is nonspecific. Neither directly relates to DIC’s coagulopathy, which causes bleeding (e.g., hematuria) due to clotting factor depletion. These findings do not support DIC’s pathophysiology, as they lack connection to the hemorrhagic or thrombotic features seen in