How long does it take for the rubber band of an anal fistula to fall off?

Written by Yang Dong
Colorectal Surgery Department
Updated on September 05, 2024
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For high anal fistulas, we opt for the seton therapy, where we typically use rubber bands as the thread. For the rubber bands used in seton therapy, we believe it is best if they fall off around ten days. Therefore, for the anal fistula rubber bands, we think it is ideal if they fall off in about two weeks at the latest. If they have not fallen off after about two weeks, we may consider further interventions such as cutting the thread or directly cutting the sphincter muscle.

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Written by Yu Xu Chao
Colorectal Surgery
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Is it better for the external opening of an anal fistula to be closed or not closed?

In clinical practice, it is generally best not to close the external opening of an anal fistula. Keeping the drainage unobstructed can prevent the infection from worsening or the formation of multiple branches. This is because when the fistula drains properly, the infectious secretions can flow out of the external opening. However, if the external opening does close, the infected tissues and secretions will accumulate within the fistula and then spread to the surrounding areas, forming branches and leading to an increase in the number of branches, thus creating a complex anal fistula and increasing the difficulty of future surgeries. Therefore, it is best not to close the external opening of an anal fistula. Clinically, the treatment for an anal fistula involves fistulectomy, which primarily involves removing the internal opening and the fistula. The external opening also needs to be treated. Postoperatively, medications such as erythromycin ointment gauze strips should be used for dressing changes.

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Written by Chen Tian Jing
Colorectal Surgery
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Which is more serious, anal fistula or hemorrhoids?

Anal fistulas and hemorrhoids are two different types of common colorectal diseases; neither can be said to be more severe than the other, as the severity of each disease depends on its progression and extent. If it's a simple superficial anal fistula, the severity is generally mild, primarily treated with surgery. However, if a high, complex anal fistula is present, in addition to surgery, a comprehensive pelvic MRI examination is also required to rule out any infections in the deep sphincter and ischioanal fossa. The severity of hemorrhoids primarily involves circular mixed hemorrhoids, or those accompanied by incarceration. If circular mixed hemorrhoids with incarceration occur, it is advisable to undergo surgical treatment as soon as possible to avoid necrosis. If hemorrhoids result in persistent and significant rectal bleeding, surgery should also be performed promptly to prevent anemia in the patient.

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Written by Chen Tian Jing
Colorectal Surgery
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Anal fistulas secondary to which disease?

An anal fistula generally originates from a perianal abscess, which is an infection focus formed near the anal sinuses in the local area of the anus. During its onset, there is obvious local redness, swelling, heat, and pain accompanied by the formation of a pus cavity containing pus. As the condition of the perianal abscess worsens, the local pus cavity will rupture and discharge pus, thus forming an anal fistula. After the rupture of a perianal abscess, its external opening cannot heal by itself, and there will be intermittent recurring discharge of pus. Therefore, it is necessary to carry out surgical treatment as soon as possible after the formation of an anal fistula, to prevent the enlargement of the local pus cavity or thickening of the fistula wall, which complicates later surgery and treatment and significantly impacts the patient's normal life.

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Written by Chen Tian Jing
Colorectal Surgery
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How to deal with a ruptured anal fistula?

The clinical symptoms of anal fistula mainly include intermittent discharge of pus from the external opening near the anus, or occasional acute attacks that cause redness, swelling, heat, and pain around the external opening of the anus. If the external opening of the anal fistula breaks and discharges pus, or is accompanied by pain, it is considered an acute phase of the anal fistula. The primary method of management and treatment is surgery, with the main surgical approach being fistulotomy and seton placement. To locally alleviate the inflammatory symptoms of the external opening of the anal fistula, anti-inflammatory ointments can be applied for temporary anti-inflammatory treatment. However, to avoid the local complications such as thickening or branching of the fistula, it is advised that patients undergo surgical treatment of the anal fistula as soon as possible. (Please use medication under the guidance of a professional physician, and do not self-medicate.)

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Written by Yu Xu Chao
Colorectal Surgery
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How to determine if you have an anal fistula

First, you can judge whether you have an anal fistula based on symptoms. Patients with anal fistula often experience recurrent perianal swelling and pain, as well as discharge of pus and blood, which may also have a foul odor, with secretion often found on their underwear. In such cases, patients should consider whether they have an anal fistula. Additionally, patients with anal fistulas in the early stages often have perianal abscesses, which generally tend to form fistulas after the abscess ruptures spontaneously or is surgically drained. Patients can also visit the colorectal surgery department of a hospital for a digital rectal examination, where the fistula tract and the internal opening can be felt. MRI scans of the perianal region can also be performed to determine the type and severity of the anal fistula. Clinically, once an anal fistula is detected, it is advisable to opt for fistula excision surgery to completely cure the anal fistula by removing the internal opening and the fistula tract. Post-surgery, it is essential to persist with dressing changes to avoid wound infection and bleeding.