Chylothorax Treatment & Management
- Author: Sasha D Adams, MD; Chief Editor: BS Anand, MD more...
Patients with chylothorax can be treated by conservative means or surgery. Certain principles are common to both treatment options, including treating the underlying cause, decreasing chyle production, draining and obliterating the pleural space, providing appropriate fluid and nutritional replacement, and instituting necessary respiratory care.
Always consider conservative management,[4, 5] because the thoracic duct leak closes spontaneously in nearly 50% of patients. Few or no symptoms and minimal chyle loss characterize these cases. Decompress the pleural space with tube thoracostomy or repeated thoracentesis to keep the lung expanded against the chest wall and mediastinum. Reduce chyle production by instituting total parenteral nutrition or a fat-restricted oral diet supplemented with medium-chain triglycerides.
Chemoradiation may promote resolution of chylothorax and should be used in patients with malignant chylothorax who are not surgical candidates.
Somatostatin, or its analogue octreotide, has been used with success in a number of pediatric cases of postoperative and iatrogenic chylothorax.[6, 7, 8] Reported effective doses of intravenous somatostatin range from 3.5 to 12 mcg/kg/h. Care must be taken to watch for adverse effects of somatostatin therapy, including diarrhea, hypoglycemia, and hypotension.
The timing of surgical management is controversial and depends on the etiology of the chylothorax and the patient's overall condition.[4, 9]
Preoperatively, localize the thoracic duct leak by means of lymphangiography, oral administration of cream, or injection of 1% Evans blue dye. Cream is high in long-chain fatty acids and works by increasing chyle flow. It is administered enterally at 60-90 mL/h for 3-6 hours until a change in the color of the pleural fluid is noted. Evans blue dye can either be injected into the web space of the toes for uptake into the lymphatic space or be added to cream to increase visualization. A postoperative management algorithm for children can be found in an article by Panthongviriyakul and Bines.
Indications for surgical intervention include the following:
Chyle leak greater than 1 L/d for 5 days or a persistent leak for more than 2 weeks despite conservative management
Nutritional or metabolic complications, including electrolyte depletion and immunosuppression
Loculated chylothorax, fibrin clots, or trapped lung
Postesophagectomy chylothorax (Patients with this carry a high mortality rate if treated conservatively.) 
Surgical options depend on the site of injury and the etiology of the chylothorax and include the following:
Thoracic duct ligation is the criterion standard. The duct is usually ligated between the eighth and twelfth thoracic vertebrae, just above the aortic hiatus. The approach is usually through the right chest, either by an open right thoracotomy or through a thoracoscope. [12, 13] Thoracic duct ligation also appears to be an effective option for persistent refractory chylothorax, and it may be a first-line option for cases of right-side effusion with an output rate over 20 mL/kg. 
A retrospective study (2002-2014) of 14 infants with congenital chylothorax suggests that thoracoscopic parietal pleural clipping may be safe and effective to disrupt the pleural lymphatic channel flow.  Of the infants who underwent the procedure (n = 6), chest tube output decreased from an average of 86.96 mL/kg/day 2 days before surgery to an average of 6.5 mL/kg/day 2 days after surgery. 
A pleuroperitoneal shunt can be successful for refractory chylothorax but can be complicated by infection and obstruction. 
Pleurodesis is often used for malignant chylothorax, but it will not work in a case of loculated chylothorax or a trapped lung.
Surgical pleurectomy is a treatment option.
Mortality and morbidity rates for cases of chylothorax are approximately 10% in major clinical medical centers. Complications include malnutrition and immunosuppression.
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