Dear Andrea, If you really think that the traumatism may be the cause of the obstruction and this happens at 6 years of age and the complete thrombophilic study is negative stopping anticoagulation can be a good alternative. However, it looks like the patient had portal hyeprtension with ascites. has the patient varices?. Can you consider that the patients is not responding to medical treatment? is the patient a candidate to go a step further in the treatment?.
Best