Fistula

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In medicine, a fistula (pl. fistulas or fistulae) is an abnormal connection or passageway between organs or vessels that normally do not connect.

Fistula on sheep

1 Location of fistulas
2 Types of fistulas
3 Causes
4 Treatment
5 Therapeutic use
6 See also
7 External links

[edit] Location of fistulas

Fistulas can develop in various parts of the body, including the following (sorted by the International Statistical Classification of Diseases and Related Health Problems):it is a very serious and painful disorder that most commonly occurs in people of third world or poorer countries.

[edit] H: Diseases of the eye, adnexa, ear, and mastoid process

(H04.6) Lacrimal fistula
(H70.1) Mastoid fistula
- Craniosinus fistula: between the intracranial space and a paranasal sinus
(H83.1) Labyrinthine fistula
- Perilymph fistula: tear between the membranes between the middle and inner ears

[edit] I: Diseases of the circulatory system

(I25.4) Coronary arteriovenous fistula, acquired

(I28.0) Arteriovenous fistula of pulmonary vessels
- Pulmonary arteriovenous fistula: between an artery and vein of the lungs, resulting in shunting of blood. This results in improperly oxygenated blood

(I67.1) Cerebral arteriovenous fistula, acquired

(I77.0) Arteriovenous fistula, acquired

(I77.2) Fistula of artery

[edit] J: Diseases of the respiratory system

(J86.0) Pyothorax with fistula

(J95.0) Tracheoesophageal fistula following tracheostomy: between the breathing and the feeding tubes

[edit] K: Diseases of the digestive system

Duodeno Biliary Fistula

(K11.4) Fistula of salivary gland

(K31.6) Fistula of stomach and duodenum
(K31.6) Gastrocolic fistula
(K31.6) Gastrojejunocolic fistula
- Enterocutaneous fistula: between the intestine and the skin surface, namely from the duodenum or the jejunum or the ileum. This definition excludes the fistulas arising from the colon or the appendix.
- Gastric fistula: from the stomach to the skin surface

(K38.3) Fistula of appendix

(K60.3) Anal fistula
- (K60.3) Anorectal fistula: connecting the rectum or other anorectal area to the skin surface. This results in abnormal discharge of feces through an opening other than the anus. Also called fistula-in-ano.
  - Fecal fistula: see Anorectal
  - Fistula-in-ano: see Anorectal
(K 60.4) Rectal fistula
(K 60.5) Anorectal fistula

(K63.2) Fistula of intestine
- Enteroenteral fistula: between two parts of the intestine

(K82.3) Fistula of gallbladder

(K83.3) Fistula of bile duct
- Biliary fistula: connecting the bile ducts to the skin surface, often caused by gallbladder surgery
- Pancreatic fistula: between the pancreas and the exterior via the abdominal wall

[edit] M: Diseases of the musculoskeletal system and connective tissue

(M25.1) Fistula of joint

[edit] N: Diseases of the genitourinary system

(N32.1) Vesicointestinal fistula

(N36.0) Urethral fistula
- Innora:between the prostatic utricle and the outside of the body

(N64.0) Fistula of nipple

(N82) Fistulae involving female genital tract / Obstetric fistula
- (N82.0) Vesicovaginal fistula: between the bladder and the vagina
- (N82.1) Other female urinary-genital tract fistulae
  - Cervical fistula: abnormal opening in the cervix
- (N82.2) Fistula of vagina to small intestine
  - Enterovaginal fistula: between the intestine and the vagina
- (N82.3) Fistula of vagina to large intestine
  - Rectovaginal: between the rectum and the vagina
- (N82.4) Other female intestinal-genital tract fistulae
- (N82.5) Female genital tract-skin fistulae
- (N82.8) Other female genital tract fistulae
- (N82.9) Female genital tract fistula, unspecified

[edit] Q: Congenital malformations, deformations and chromosomal abnormalities

(Q18.0) Sinus, fistula and cyst of branchial cleft
- Congenital Preauricular fistula: A small pit in front of the ear. Also called Fistula Auris Congenita or Ear Pit.

(Q26.6) Portal vein-hepatic artery fistula

(Q38.0) Congenital fistula of lip

(Q38.4) Congenital fistula of salivary gland

(Q42.0) Congenital absence, atresia and stenosis of rectum with fistula

(Q42.2) Congenital absence, atresia and stenosis of anus with fistula

(Q43.6) Congenital fistula of rectum and anus

(Q51.7) Congenital fistulae between uterus and digestive and urinary tracts

(Q52.2) Congenital rectovaginal fistula

[edit] T: External causes

(T14.5) Traumatic arteriovenous fistula

(T81.8) Persistent postoperative fistula

[edit] Types of fistulas

Various types of fistulas include:

Blind: with only one open end
Complete: with both external and internal openings
Incomplete: a fistula with an external skin opening, which does not connect to any internal organ

Although most fistulas are in forms of a tube, some can also have multiple branches.

[edit] Causes

Various causes of fistula are:

Diseases: Inflammatory bowel diseases, such as Crohn's disease and ulcerative colitis, are the leading causes of anorectal, enteroenteral, and enterocutaneous fistulas. A person with severe stage-3 hidradenitis suppurativa will also develop fistulas.

Medical treatment: Complications from gallbladder surgery can lead to biliary fistula. Radiation therapy can lead to vesicovaginal fistula. An arteriovenous fistula can be deliberately created, as described below in theraputic use.

Trauma: Head trauma can lead to perilymph fistulas, whereas trauma to other parts of the body can cause arteriovenous fistulas. Obstructed labor can lead to vesicovaginal and rectovaginal fistulas. An obstetric fistula develops when blood supply to the tissues of the vagina and the bladder (and/or rectum) is cut off during prolonged obstructed labor. The tissues die and a hole forms through which urine and/or feces pass uncontrollably. Vesicovaginal and rectovaginal fistulas may also be caused by rape, in particular gang rape, as evidenced by the abnormally high number of women in conflict areas who have suffered fistulae.^{[citation needed]}

[edit] Treatment

Treatment for fistulae varies depending on the cause and extent of the fistula, but often involves surgical intervention combined with antibiotic therapy.

Typically the first step in treating a fistula is an examination by a doctor to determine the extent and "path" that the fistula takes through the tissue.

In some cases the fistula is temporarily covered, for example a fistula caused by cleft palate is often treated with a palatal obturator to delay the need for surgery to a more appropriate age.

Surgery is often required to assure adequate drainage of the fistula (so that pus may escape without forming an abscess). Various surgical procedures are commonly used, most commonly fistulotomy, placement of a seton (a cord that is passed through the path of the fistula to keep it open for draining), or an endorectal flap procedure (where healthy tissue is pulled over the internal side of the fistula to keep feces or other material from reinfecting the channel). Treatments involving filling the fistula with fibrin glue or plugging it with plugs made of porcine small intestine submucosa have also been explored in recent years, with variable success. Surgery for anorectal fistulae is not without side effects, including recurrence, reinfection, and incontinence.

It is important to note that surgical treatment of a fistula without diagnosis or management of the underlying condition, if any, is not recommended. For example, surgical treatment of fistulae in Crohn's disease can be effective, but if the Crohn's disease itself is not treated, the rate of recurrence of fistula is very high (well above 50%).

Kshar sutra Therapy is non-operative and belongs to the Para surgical group of measures with nil recurrence rate of disease. It involves the application of a specially prepared medicated thread processed with certain vegetable caustics. The thread is passed into the fistulous tract, tied outside the anal aperture and left in situ for seven days after which it is changed and retied. The patient is sent home after every sitting and is advised to continue his routine work as usual. In due course of time , the thread falls out spontaneously and the fistulous track is simultaneously healed. The resultant scar formation is very minimal and the method is safe and free from any complications. [citation needed]

[edit] Therapeutic use

In end stage renal failure patients, a cimino fistula is often deliberately created in the arm by means of a short day surgery in order to permit easier withdrawal of blood for hemodialysis.