Anal fistula, thread-drawing method.

The treatment method is to use the tightening force of hanging thread to block qi and blood, meridians and collaterals, so as to cause local tissue necrosis, thus achieving the therapeutic purpose of slow incision. The advantages of thread-drawing therapy are: simple operation, safety and reliability, exact curative effect, less sequelae, low cost and no need for special medical equipment. Up to now, thread-drawing therapy is still the most important means to treat high anal fistula.

There are three main problems in clinic: ① the internal opening is difficult to find: whether the internal opening can be found correctly is the key to the success or failure of thread hanging. Doctors often encounter the closure of the internal orifice when exploring for the internal orifice, that is, false healing or unobstructed pipeline, and it is difficult to find the correct internal orifice as a result.

② Wound adhesion and poor drainage: After thread hanging, the patient's anus is always contracting due to pain, so that the wounds outside the anus can't be completely released, which often makes the opened wounds quickly adhere together, resulting in poor drainage of the external orifice and easy recurrence of fistula.

③ The hanging thread is not easy to fall off: The hanging thread therapy uses the elastic retraction force of the rubber band to open the fistula, so the hanging thread usually falls off naturally in about 10 ~ 15 days. But in clinical practice, people who have hung up for more than a month will encounter it, which will only increase the pain of patients.