Initial Management of Paralytic Ileus

Therapeutic Approach

• The American College of Gastroenterology recommends maintaining the patient strictly nothing by mouth (NPO) until the ileus is resolved, as oral feeding is contraindicated in the presence of ileus and may worsen abdominal distension 1
• Consideration of nasogastric tube for decompression is recommended if there is significant abdominal distension, vomiting, or accumulation of gastric fluid 2, 3
• Administration of isotonic crystalloid solutions, such as lactated Ringer's solution or normal saline, is recommended for intravenous rehydration 1
• Rehydration should be continued until the pulse, perfusion, and mental status are normalized, and there is no evidence of ileus 1
• In patients with severe dehydration or shock, initial fluid boluses of 20 mL/kg should be considered 2, 1
• Monitoring of fluid balance with the goal of adequate central venous pressure and urine output > 0.5 mL/kg/h is recommended 2
• Monitoring and correction of electrolyte abnormalities, especially potassium, sodium, and magnesium, is crucial 1
• Concurrent replacement of potassium is indicated in patients who have developed potassium depletion 2
• Magnesium deficiency is common, especially if there is a high-output stoma; magnesium oxide may cause fewer osmotic effects than other preparations 3
• The American Society of Clinical Oncology recommends discontinuing immediately all agents that exacerbate ileus, including antimotility agents, anticholinergic medications, antidiarrheal agents, and opioids 2
• Loperamide in high doses can cause paralytic ileus, and these patients need to be monitored while using loperamide 2
• In the presence of established ileus, antidiarrheals and opioids should be avoided completely 2, 1
• Frequent monitoring of vital signs and clinical status during rehydration is recommended 1, 4
• Evaluation of signs of return of intestinal function, such as passage of flatus or stool, is essential 1
• Reevaluation of hydration status after 2-4 hours is recommended 4
• Monitoring of abdominal distension and bowel sounds is crucial 1
• Once the ileus is resolved and the patient can tolerate oral feeding, early enteral nutrition should be initiated 5
• If the ileus is prolonged and oral/enteral nutrition cannot be maintained, parenteral nutrition may be required 3
• Enteral nutrition is preferred over parenteral nutrition when the intestine is accessible and functional 3, 5

Initial Management of Ileus

Fluid Management and Resuscitation

• The World Journal of Emergency Surgery recommends avoiding fluid overload, aiming to limit weight gain to <3 kg by postoperative day three 6

Electrolyte Correction and Monitoring

• The Gut guideline recommends monitoring and correcting electrolyte abnormalities, especially potassium, sodium, and magnesium, and checking serum electrolytes regularly (every 24-48 hours in severe cases) 7
• The Gut guideline also recommends maintaining hemoglobin >10 g/dL with blood transfusion if needed 7

Medication Management and Analgesia

• The World Journal of Emergency Surgery suggests using opioid-sparing analgesia, such as regular paracetamol, regular NSAIDs, and regular or as-required tramadol, as a critical component of ileus prevention and management 6

Monitoring and Supportive Care

• The Gut guideline recommends monitoring vital signs frequently (at least four times daily), reassessing hydration status, and evaluating for signs of return of intestinal function 7
• The Gut guideline also recommends maintaining a stool chart to record number and character of bowel movements 7
• The Gut guideline suggests obtaining daily abdominal radiography if colonic dilatation is detected at presentation, and maintaining a low threshold for further radiological assessment if clinical deterioration occurs 7

Thromboprophylaxis and Mobilization

• The Gut and World Journal of Emergency Surgery guidelines recommend administering subcutaneous heparin to reduce the risk of thromboembolism 7, 8
• The World Journal of Emergency Surgery guideline encourages regular ambulation as tolerated, as early mobilization decreases pulmonary complications, thromboembolism, and insulin resistance 6

Nutritional Support

• The World Journal of Emergency Surgery guideline recommends considering parenteral nutrition for severely undernourished patients, and initiating early enteral nutrition once ileus resolves and the patient can tolerate oral feeding 8