The nurse cares for a postoperative client. Review the electronic health record. Complete the diagram by dragging from the choices below to specify what condition the client is most likely experiencing, two actions the nurse should take to address that condition, and two parameters the nurse should monitor to assess the client's progress

Brief introduction: Recognizing postoperative complications following a Roux-en-Y gastric bypass such as peritonitis is crucial. Peritonitis is an acute, life-threatening inflammation of the peritoneum often caused by gastrointestinal perforation, as suggested by free air under the diaphragm on abdominal X-ray. Clinical findings such as rigid “board-like” abdomen, severe worsening abdominal pain, fever, leukocytosis, and elevated lactate indicate systemic inflammatory response and possible sepsis. Prompt recognition and urgent intervention are essential to prevent rapid deterioration. Rationale for correct choices: • The presence of sudden severe abdominal pain, rigid board-like abdomen, fever, leukocytosis, elevated lactate, and free air under the diaphragm strongly indicates gastrointestinal perforation leading to peritonitis. Postoperative Roux-en-Y patients are at risk for anastomotic leak, which can release gastric contents into the peritoneal cavity. This causes widespread inflammation and systemic infection. These findings are classic for acute peritonitis rather than routine postoperative changes. • Inserting a nasogastric tube helps decompress the gastrointestinal tract, reduce gastric distention, and limit further leakage of gastric contents into the peritoneal cavity. This is a critical supportive intervention in suspected bowel perforation or peritonitis. It also helps prevent vomiting and aspiration, which are high risks in this unstable client. Gastric decompression is a priority stabilizing measure. • Broad-spectrum antibiotics are essential because peritonitis is typically caused by polymicrobial infection from gastrointestinal flora. Early administration helps control systemic infection and reduce the risk of sepsis and septic shock. The client already shows signs of systemic inflammatory response, including fever, tachycardia, and elevated WBC. Prompt antibiotic therapy is life-saving in this condition. • Nausea and vomiting are common manifestations of peritonitis due to severe abdominal inflammation and bowel irritation. Monitoring these symptoms helps evaluate worsening obstruction, infection severity, and risk of aspiration. In postoperative abdominal complications, increasing nausea/vomiting can indicate deterioration. It is a key clinical indicator of progression. • Elevated WBC count reflects ongoing infection and inflammatory response in peritonitis. In this case, a WBC of 18,500/mm³ indicates significant systemic infection. Monitoring trends helps evaluate response to antibiotics and worsening sepsis risk. It is a critical laboratory marker of disease severity and progression. Rationale for incorrect options: • Although abdominal pain and no bowel movement could suggest obstruction, the presence of free air under the diaphragm and rigid board-like abdomen is not consistent with simple obstruction. SBO does not typically cause pneumoperitoneum or severe systemic infection with elevated lactate. • Appendicitis is unlikely in a postoperative Roux-en-Y patient with diffuse rigid abdomen and free air under the diaphragm. Appendicitis typically presents with localized right lower quadrant pain (McBurney’s point) rather than generalized peritonitis findings. The severity and imaging findings here indicate a more advanced intra-abdominal catastrophe. • Severe abdominal pain (8/10), rigid abdomen, fever, leukocytosis, and free air are not expected postoperative findings. Normal postoperative recovery would include gradually decreasing pain, soft abdomen, and stable vitals. These findings indicate a serious complication rather than normal healing. • Advancing diet to full liquid is contraindicated because the client shows signs of acute abdominal perforation and peritonitis. Oral intake would worsen gastrointestinal leakage and increase peritoneal contamination. The priority is bowel rest, not feeding progression. • Laxatives are inappropriate because the client’s condition is not constipation-related but due to suspected perforation. Increasing bowel motility could worsen leakage and abdominal irritation. This intervention could significantly increase risk of deterioration. • Peritonitis is not transmitted via direct contact, so contact precautions are not indicated. Standard precautions are sufficient unless there is a specific infectious organism requiring isolation. The priority is emergency management, not isolation measures. • Pain localized to McBurney’s point is classically associated with appendicitis, not generalized peritonitis. In this client, the pain is sudden, severe, and diffuse with a rigid “board-like” abdomen, which indicates widespread peritoneal inflammation rather than localized right lower quadrant irritation. • Family member exposure is not a clinical indicator of the client’s physiologic status or disease progression. While infection control considerations may be relevant in contagious diseases, peritonitis is not transmitted through casual contact. Therefore, monitoring exposure of family members does not provide meaningful information about the severity or progression of the client’s intra-abdominal infection. • Reverse peristaltic waves are more commonly associated with intestinal obstruction conditions such as bowel obstruction or severe gastric outlet obstruction. In this case, the diagnostic findings of free air under the diaphragm and rigid abdomen strongly indicate perforation with peritonitis rather than a motility disorder. Thus, it is not an appropriate parameter.