Some anal fistulas refuse to heal, returning after surgery or sitting in spots where cutting risks the sphincter muscle. For these difficult cases, Dr. Zuri Murrell may turn to amniotic tissue, including a product called Clarix, to support the body’s own healing.
Amniotic Tissue as an Option for Difficult Anal Fistulas
An anal fistula is a small tunnel that forms between the anal canal and the skin, usually after an infection or abscess. Many fistulas begin as an untreated anal abscess, and when the drainage tract never fully closes, a chronic fistula is left behind. Most fistulas respond well to standard surgery. A smaller number are complex or recurrent, and these are where biologic options like amniotic tissue can help. This post looks at what amniotic tissue is and how Dr. Murrell puts it to use.
What Makes an Anal Fistula Complex or Hard to Heal?
Not every fistula is straightforward. A fistula is generally considered complex or hard to heal when it involves factors such as:
- A tract that crosses a large portion of the sphincter muscle
- Multiple tracts or branches rather than a single channel
- A fistula tied to Crohn’s disease or inflammatory bowel disease
- Recurrence after one or more previous surgeries
- A location where standard surgery risks bowel control
These cases call for treatments that close the fistula while protecting muscle function. You can review the full menu of options on our anal fistula treatment page.
What Is Amniotic Tissue?
Amniotic tissue comes from the amniotic membrane, the innermost layer of the placenta that surrounds and protects a baby during pregnancy. It is donated by healthy mothers after scheduled cesarean deliveries, then screened and processed into a sterile graft for medical use.
Amniotic tissue is valued in wound care because it naturally contains growth factors, collagen, and anti-inflammatory proteins. Placed at a wound, it acts as a supportive scaffold that can help the body repair tissue while calming inflammation. Amniotic membrane is not new to medicine either. Surgeons have used it in wound care and eye surgery for decades, and its use for fistulas builds on that track record.
What Is Clarix?
Clarix is a specific amniotic tissue product that Dr. Murrell may use for fistula care. It is a cryopreserved amniotic membrane and umbilical cord allograft, meaning it is preserved in a way designed to retain the natural properties of birth tissue.
Like other amniotic grafts, Clarix is made from donated, screened tissue and carries no living embryonic material. Its purpose is to provide a biologic scaffold rich in the anti-inflammatory and healing-support components found in amniotic membrane.
How Amniotic Tissue Supports the Body’s Healing Response
Dr. Murrell describes amniotic tissue as a way to support the body’s own repair process rather than a standalone cure. When placed into a cleaned fistula tract, the graft is thought to work in a few ways:
- Acting as a scaffold that healthy tissue can grow across
- Releasing growth factors that signal the body’s reparative cells toward the area
- Calming the chronic inflammation that keeps a fistula open
Because it encourages the body’s natural healing, amniotic tissue is sometimes called a stem cell recruiter. Results vary from patient to patient, and Dr. Murrell selects it only when the clinical picture fits.
How Dr. Murrell Uses Amniotic Tissue in Fistula Treatment
Amniotic tissue is rarely used on its own. Dr. Murrell first clears the fistula of infection and, when needed, uses a draining seton or a mucosal flap to prepare the tract. Once the area is clean and ready, he places the amniotic graft to support closure.
Amniotic products come in both sheet and flowable forms. A flowable, particulate form can reach the twists and branches of an irregular tract that a flat sheet cannot. The approach is minimally invasive and spares the sphincter muscle, which makes it appealing for fistulas in delicate locations or those that have failed earlier repairs. He may also stage treatment, using an early visit to settle inflammation before placing the graft at a later procedure for the best chance of closure.
Who Is a Candidate for Amniotic Tissue Fistula Treatment?
Amniotic tissue is not the first choice for a simple fistula, which usually heals with a standard fistulotomy. It becomes worth considering for patients who:
- Have a complex or high fistula that crosses significant muscle
- Have a fistula related to Crohn’s disease
- Have had one or more fistula surgeries that did not fully heal
- Want to lower the risk to sphincter control
An active abscess usually needs to be drained and the infection controlled before any biologic graft is placed. Dr. Murrell decides candidacy after examining the fistula and reviewing your history.
What Are the Benefits of Amniotic Tissue for Fistulas?
For the right patient, amniotic tissue offers several potential advantages:
- A sphincter-sparing option that helps protect bowel control
- A minimally invasive alternative when cutting the tract is risky
- A possible path forward when previous surgeries have failed
- Use of a natural biologic rather than a synthetic implant
These benefits depend on the individual case, and no single treatment works for every fistula.
What to Expect During and After Treatment
Placing an amniotic graft is typically an outpatient procedure. Most patients go home the same day and return to light activity within a short time, guided by Dr. Murrell’s instructions. Some drainage and mild discomfort can be expected as the tract heals. Because amniotic tissue is a natural graft, the body generally accepts it without the reactions sometimes seen with synthetic materials. Follow-up visits let Dr. Murrell track closure and confirm the fistula is healing while bowel control stays intact.
Why Choose Dr. Murrell for Complex Anal Fistula Care?
Dr. Zuri Murrell is a double board-certified colorectal surgeon and Director of the Colorectal Cancer Program at Cedars-Sinai. He treats some of the most difficult fistula cases in Los Angeles, including recurrent fistulas referred after treatment elsewhere, and he trains other surgeons in minimally invasive techniques. His focus stays on healing the fistula while preserving the muscle that protects your quality of life.
Amniotic Tissue for Anal Fistulas FAQs
Is amniotic tissue the same as embryonic stem cells?
No. Amniotic tissue is donated placental membrane collected after a healthy delivery, with the mother’s consent. It does not contain embryonic stem cells and is not related to embryonic research.
Does amniotic tissue guarantee my fistula will heal?
No treatment can guarantee healing, especially for complex fistulas. Amniotic tissue is one tool Dr. Murrell uses to support the body’s repair process, and outcomes depend on the fistula and the patient.
Is amniotic tissue treatment painful?
The procedure is generally well tolerated and performed on an outpatient basis. Mild discomfort and some drainage are normal during healing, and Dr. Murrell reviews aftercare with you.
How long does it take to heal after amniotic tissue treatment?
Healing time varies with the fistula’s complexity. Simple tracts may close over a few weeks, while complex or Crohn’s-related fistulas can take longer. Dr. Murrell monitors your progress at follow-up visits.
Can amniotic tissue help a Crohn’s-related fistula?
It may. Fistulas linked to Crohn’s disease are notoriously hard to heal, and biologic options are sometimes combined with medical therapy. Dr. Murrell coordinates care for these complex cases.
Book Your Consultation for Complex Anal Fistula Treatment
If you have a fistula that keeps returning or has not healed after surgery, you have options. Contact Dr. Murrell’s office to schedule a consultation and find out whether amniotic tissue is right for your case.
