The main causes of these complications include:

• Hemorrhage: Caused by injury to a large vessel during the operation.
• Post-cholecystectomy syndrome: Believed to be a consequence of the loss of the bile reservoir through the removal of the gallbladder.
• Bile duct injury: Often a result of inadvertent damage to the biliary tree during surgery.
• Pneumoperitoneum: Arises due to the insufflation of gas during laparoscopic surgery.

Signs and symptoms

• Haemorrhage: Rapid hypotension or development of a retroperitoneal hematoma.
• Post-cholecystectomy syndrome: Symptoms include colicky abdominal pain, diarrhea, vague abdominal pain, and jaundice.
• Bile duct injury: Presents with dark-colored urine and stools, potentially progressing to chemical peritonitis, causing abdominal pain and distension.
• Pneumoperitoneum: Trapped air in the subcutaneous space can lead to subcutaneous emphysema, pneumothorax, or air embolism.

Differential diagnosis

• Acute pancreatitis: Presents with severe upper abdominal pain that radiates to the back, nausea, vomiting, and possible shock in severe cases.
• Peptic ulcer disease: Symptoms can include burning stomach pain, feeling of fullness, bloating, fatty food intolerance, heartburn, and nausea.
• Acute hepatitis: Presents with fatigue, nausea, loss of appetite, dark urine, joint pain, jaundice, and abdominal pain.
• Irritable bowel syndrome (IBS): Characterized by symptoms such as cramping, abdominal pain, bloating, gas, and diarrhea or constipation.

Investigations

In order to diagnose the exact cause of these complications and to determine the most effective treatment, the following investigations may be required:

• Biochemical analysis: Liver function tests and full blood count (FBC).
• Ultrasound: To detect the presence of any hematoma or free fluid in the abdomen.
• Computed tomography (CT) scan: To further evaluate any suspected injury or pathology.