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Fistula Open Surgery | PristynCare

Fistula open surgery (fistulotomy) treats anal fistula by cutting open the fistula tract and allowing it to heal from the inside out. It is effective for simple low fistulas and offers a high cure rate with low recurrence.

Fistula open surgery (fistulotomy) treats anal fistula by cutting open the fistula tract ... Read More

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    Dr. Galla Murali Mohan - A general-surgeon for Anal Fistula

    Dr. Galla Murali Mohan

    MBBS, MS-General Surgery
    34 Yrs.Exp.

    5.0/5

    34 Years Experience

    location icon Pristyn Care Archana Hospital, Madeenaguda, Hyderabad
    Call Us
    080-6542-3724
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    Dr. Vipin Nagpal - A general-surgeon for Anal Fistula

    Dr. Vipin Nagpal

    MBBS, MS-General Surgery
    31 Yrs.Exp.

    5.0/5

    31 Years Experience

    location icon Pristyn Care Elantis Hospital, Lajpat Nagar, Delhi
    Call Us
    080-6542-3711
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    Dr. Rakesh Shivhare - A general-surgeon for Anal Fistula

    Dr. Rakesh Shivhare

    MBBS, MS(GI & General Surgeon)
    30 Yrs.Exp.

    5.0/5

    30 Years Experience

    location icon Opp.Badwani Plaza, Manorama Ganj, Old Palasia, Indore, Madhya Pradesh 452003
    Call Us
    080-6542-3720
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    Dr. Apoorv Shrivastava - A general-surgeon for Anal Fistula

    Dr. Apoorv Shrivastava

    MBBS, DNB-General Surgery
    25 Yrs.Exp.

    4.5/5

    25 Years Experience

    location icon Pristyn Care Eminent Hospital 6/1 Opp. Barwani Plaza, Manorama Ganj, Old Palasia, Indore - 452018
    Call Us
    080-6542-3720

Fistula Open Surgery

Fistula open surgery, also known as fistulotomy, is a procedure in which the fistula tract is cut open, cleaned, and allowed to heal from the inside out. It is considered the most effective treatment for simple low anal fistulas. The procedure involves laying open the entire fistula tract by cutting the tissue covering it, converting the tunnel into an open wound that heals with granulation tissue. Open fistula surgery has a high success rate for low intersphincteric and transsphincteric fistulas with minimal sphincter involvement. Pristyn Care provides open fistula surgery by experienced colorectal surgeons with comprehensive post-operative care.

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Symptoms

Patients with anal fistula requiring open surgery often experience:

  • Persistent discharge of pus, blood, or mucus from an opening near the anus
  • Chronic pain and swelling around the anal region
  • Recurrent anal abscesses that keep returning
  • Pain and discomfort during bowel movements
  • Itching and irritation near the anal opening
  • Fever in cases of active infection
  • A visible external opening near the anus that does not heal on its own

Are you going through any of these symptoms?

Types

Fistula open surgery is used for the following types of anal fistula:

  • Intersphincteric fistula: The most common type; passes between internal and external sphincters; ideal candidate for fistulotomy
  • Low transsphincteric fistula: Passes through the lower portion of the external sphincter; treatable with fistulotomy with minimal sphincter risk
  • Superficial fistula: Does not involve the sphincter muscles; easily treated with fistulotomy

Surgical Techniques

Open fistula surgery can be performed using different techniques:

  • Fistulotomy: The fistula tract is laid open by cutting overlying tissue; the wound heals by secondary intention
  • Fistulectomy: The entire fistula tract is excised rather than laid open; provides clean margins but leaves a larger wound
  • Seton placement: A suture is passed through the fistula tract as a staged procedure for high complex fistulas

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Risk Factors for Anal Fistula

Risk factors that can lead to anal fistula requiring open surgery include:

  • History of recurrent anal abscesses
  • Crohn disease or other inflammatory bowel conditions
  • Tuberculosis affecting the anal region
  • Trauma or injury to the anal area
  • Sexually transmitted infections affecting the rectum
  • Diabetes and immunosuppression increasing infection risk
  • Previous anal surgery or radiation therapy

Who Needs Open Fistula Surgery?

Open fistula surgery (fistulotomy) is recommended for patients with simple low intersphincteric or transsphincteric fistulas where the risk of sphincter damage is minimal. It is also used for fistulas that have not healed with Ksharsutra or conservative treatments. Patients with complex high fistulas involving significant sphincter muscle may require alternative procedures such as seton placement or advancement flap repair.

Diagnosis

Diagnosis before open fistula surgery includes:

  • Clinical examination: Assessment of external and internal fistula openings and the tract direction
  • Proctoscopy: Visualization of the internal opening in the anal canal
  • MRI fistulogram: Gold standard imaging to assess the fistula tract, course, and sphincter involvement
  • Examination under anesthesia: To map complex fistula tracts before surgery
  • Fistulography: Contrast X-ray imaging to visualize the fistula tract in detail

Treatment: Fistula Open Surgery

Fistulotomy is performed under spinal or general anesthesia. The surgeon identifies the entire fistula tract and lays it open by cutting the tissue covering it. The wound is then curetted (cleaned out) and left open to heal by secondary intention. Patients typically go home the same day. Pristyn Care performs open fistula surgery with precision to minimize sphincter damage and ensure complete fistula eradication, significantly reducing the risk of recurrence.

Fistulotomy Procedure Steps

  1. Anesthesia: Spinal or general anesthesia ensures complete patient comfort
  2. Positioning: The patient is placed in the lithotomy or prone jack-knife position
  3. Fistula identification: A probe is inserted through the external opening to trace the tract to its internal opening
  4. Laying open: The surgeon cuts open the tissue overlying the fistula tract, converting the tunnel into an open groove
  5. Curettage: The laid-open tract is cleaned to remove granulation tissue
  6. Wound dressing: The wound is packed with gauze and left open to heal by secondary intention

Recovery After Fistulotomy

Recovery after open fistula surgery takes 4 to 6 weeks:

  • The wound heals gradually from the inside out
  • Twice daily sitz baths and wound dressings are required during recovery
  • High-fiber diet and plenty of fluids prevent constipation and straining
  • Mild to moderate pain managed with prescribed medications
  • Light activities can resume within 1 to 2 weeks
  • Regular follow-up visits for wound assessment are scheduled

Complications of Fistulotomy

Open fistula surgery is effective but may involve the following complications:

  • Postoperative pain and discomfort during wound healing
  • Fecal incontinence if significant sphincter muscle is divided
  • Wound infection requiring antibiotic treatment
  • Recurrence if the internal opening is not completely treated
  • Delayed wound healing in patients with diabetes or Crohn disease
  • Anal stenosis (narrowing) in rare cases

FAQs on Fistula Open Surgery

Is fistulotomy effective for all types of anal fistula?

Fistulotomy is most effective for simple low intersphincteric and transsphincteric fistulas where the sphincter is minimally involved. For high complex fistulas involving significant sphincter muscle, alternative procedures such as seton placement, Ksharsutra, or advancement flap are preferred to reduce the risk of incontinence.

How long does it take to heal after fistulotomy?

Recovery after fistulotomy typically takes 4 to 6 weeks. The wound heals gradually from the inside out through secondary intention healing. Regular wound dressing and sitz baths are required during this period. Most patients can resume light activities within 1 to 2 weeks of surgery.

What is the recurrence rate after open fistula surgery?

Fistulotomy has a low recurrence rate of approximately 2 to 9 percent for simple intersphincteric fistulas. Recurrence is more common when the internal opening is not completely identified and treated. Following post-operative instructions and attending regular follow-up visits significantly reduces the risk of recurrence.

Can open fistula surgery cause incontinence?

Fecal incontinence is a potential risk of fistulotomy, particularly when significant sphincter muscle is divided. The risk is low for simple low fistulas but increases for high transsphincteric or complex fistulas. The surgeon carefully assesses sphincter involvement before recommending fistulotomy to minimize this risk.

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Medically Reviewed By
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Dr. Galla Murali Mohan
MBBS, MS-General Surgery
34 Years Experience Overall
Last Updated : April 18, 2026

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