Peritonitis: Rapid Diagnosis, Etiologies, & Emergency Management.

Master the differential diagnosis of peritonitis. Review critical causes (Perforations, SBP, PD infection) and the latest guidelines for antibiotic and emergent surgical intervention.

Peritonitis usually occurs when germs enter the peritoneum. This can happen in several ways:

1. Ruptured organs:

 A burst appendix, a perforated stomach ulcer, or a hole in the colon (due to conditions like diverticulitis or inflammatory bowel disease) can release bacteria into the normally sterile peritoneal cavity.

  

2. Infection spread:

 Infections from other abdominal organs, such as the pancreas (pancreatitis) or gallbladder (cholecystitis), can spread to the peritoneum. In women, pelvic inflammatory disease can also lead to peritonitis.

  

3. Trauma:

 Injury to the abdomen can introduce bacteria or chemicals into the peritoneum.

  

4. Medical procedures:

   Peritoneal dialysis: Infection can occur through the catheter used in this kidney failure treatment if hygiene practices are inadequate.

Surgery: Although rare, infection can occur after abdominal surgery.

Endoscopy or colonoscopy: Rarely, these procedures may lead to perforation and subsequent peritonitis.

Feeding tubes: Tubes inserted through the abdomen for feeding may sometimes lead to infection.

Fluid drainage: Procedures that remove fluid from the abdomen (e.g., for ascites due to liver disease) carry a small risk of infection.

5. Spontaneous Bacterial Peritonitis (SBP):

 This type of peritonitis can occur in individuals with liver disease, particularly cirrhosis, and fluid buildup in the abdomen (ascites). The fluid can become infected without an apparent external source of bacteria. It can also occur in children with nephrotic syndrome (a kidney disorder).

6. Other irritants:

 Occasionally, peritonitis can result from the leakage of sterile but irritating body fluids, such as bile (from a perforated gallbladder), pancreatic enzymes (from pancreatitis), or stomach acid (from a perforated ulcer). Ruptured cysts or tumours in the abdomen can also lead to chemical peritonitis.

Seek immediate medical attention if you experience these signs and symptoms, as peritonitis is a medical emergency.

Diagnosis of Peritonitis:

Doctors typically use the following methods to diagnose peritonitis:

1. Physical examination: Checking for abdominal tenderness, rigidity, and other signs.

2. Medical history: Discussing symptoms and any underlying medical conditions or procedures.

3. Blood tests: Looking for signs of infection, such as an elevated white blood cell count. Blood cultures may be performed to identify bacteria in the bloodstream.

4. Imaging tests:

   X-rays: To check for perforations or other abnormalities in the digestive tract.

   Ultrasound or CT scan: To obtain detailed images of the abdominal organs and identify potential causes of peritonitis, such as a ruptured appendix or abscess.

5. Peritoneal fluid analysis: If there is fluid in the abdomen (especially in patients on peritoneal dialysis or those with ascites), a sample may be taken with a needle and tested for infection. An increased white blood cell count and the presence of bacteria in the fluid indicate peritonitis.

Treatment of Peritonitis:

Treatment for peritonitis requires hospitalization and prompt intervention:

1. Antibiotics: Administered intravenously (through a vein) to combat the infection. The specific antibiotic depends on the suspected cause of the infection.

2. Surgery: Often necessary to address the underlying cause of the peritonitis, such as removing a ruptured appendix, repairing a perforated ulcer, or draining an abscess. The surgeon will also clean out the abdominal cavity (lavage) to remove infected material.

3. Supportive care:

•    Intravenous fluids: To prevent dehydration and maintain blood pressure.

  

•  Pain medication: To manage discomfort.

  

•  Oxygen: If needed, to assist with breathing.

  

•  Blood transfusion: In some cases.

   

• Nutritional support: If the person cannot eat, a feeding tube or intravenous nutrition may be required.

For peritoneal dialysis-related peritonitis, treatment may involve antibiotics administered directly into the peritoneal cavity or intravenously. In some cases, temporary hemodialysis (another form of dialysis) may be necessary until the infection resolves. If peritonitis recurs, a switch to a different type of dialysis may be needed long-term.

Prevention of Peritonitis.

Prevention strategies depend on the underlying risks, particularly for patients undergoing peritoneal dialysis, who should strictly adhere to hygiene protocols during their treatments.

Review the Peritonitis Management Protocol: Time-Sensitive Interventions.