Adhesion Prevention
On this page
Direct answer
Adhesions are the tax every open abdominal operation levies: bands of fibrous scar between serosal surfaces that form when peritoneal injury leaves a fibrin-rich exudate that fibrinolysis fails to clear — an imbalance between plasminogen activators (tPA) and their inhibitors (PAI-1) — with ischaemic, dried or foreign-body-irritated peritoneum most liable. They form in the majority of patients after open abdominal and pelvic surgery, are the leading cause of small bowel obstruction where surgical services are mature, contribute to female infertility and chronic pelvic pain, and make every subsequent laparotomy slower and more dangerous (enterotomy at re-operation is their signature). Prevention is a hierarchy: meticulous surgical technique first — gentle handling, keeping viscera moist, haemostasis without excess diathermy, powder-free gloves, minimising infection and ischaemia, laparoscopy where appropriate — then adhesion barriers: hyaluronic acid-carboxymethylcellulose film laid beneath the incision and oxidised regenerated cellulose, both shown in randomised trials to reduce adhesion formation, with the practical caveats of cost and avoidance around fresh anastomoses.
What you must remember
- Pathogenesis sentence: peritoneal injury → fibrinous exudate → fibrinolysis overwhelmed (tPA activity falls, PAI-1 rises with ischaemia) → fibroblast colonisation and collagen over days to weeks; ischaemic tissue, however, never releases plasminogen activator — sutures tied too tightly guarantee adhesions.
- Burden numbers: adhesions follow most open abdominal operations (commonly quoted above half of patients); adhesive disease is the leading cause of small bowel obstruction admissions in developed practice — though in Indian series tuberculosis and external hernia remain major competitors.
- Timing and peak risk: clinical adhesive obstruction clusters in the first years after surgery, but risk accrues lifelong, and readmission for adhesion-related problems runs at a substantial rate over a decade in cohort studies (the SCAR studies).
- Technique rules: moist packs, minimal raw areas, fine reactive-sparing sutures without strangulating bites, avoiding starch and talc (powder-free gloves), treating infection, preferring laparoscopy where oncologically equivalent — laparoscopy reduces, not eliminates, adhesions.
- Barrier agents: hyaluronic acid-carboxymethylcellulose film (Seprafilm-type) and oxidised regenerated cellulose (Interceed-type) reduce adhesion incidence and severity in trials; the film is not wrapped around a fresh anastomosis, and cost limits use in India.
- Presentation of adhesive obstruction: colicky pain, vomiting, distension, obstipation with dilated small bowel loops on radiographs and a transition point on CT; the surgical decision is strangulation (tachycardia, localised guarding, raised lactate, free fluid) versus safe conservative management.
- Adhesiolysis caution: dividing adhesions re-injures peritoneum and new adhesions form in many patients — operate for obstruction, ischaemia or infertility, not prophylactically.
- Consent duty: warn every abdominal surgery patient about future obstruction risk — a documented part of informed consent and a recurring medicolegal theme.
From formation to the emergency department
A 34-year-old woman, three years after open surgery for a perforated appendix, arrives with colicky central abdominal pain, vomiting and distension. The reasoning runs: resuscitate (drip and suck — nasogastric decompression and intravenous fluids), image with radiographs then CT with a transition point sought, and classify — no strangulation features, so a 48-72 hour trial of conservative management with serial examinations is legitimate, since most adhesive obstructions settle. She settles; the counselling is the intervention: recurrence risk, red-flag symptoms, and the explicit message that not every future pain is obstruction. Had she presented with localised peritonism and a rising lactate, the pathway is theatre — careful adhesiolysis, repair or resection of an enterotomy, barrier film beneath the closure. The preventable tragedy is the reverse case: the fifth obstruction operated hastily at 2 a.m. in an unprepared patient, where senior hands and timing change outcomes.
Where students slip
The mechanism question is answered without the two players — name tissue plasminogen activator and its inhibitor, because the marks sit in the pair. The epidemiology answer overreaches: adhesions lead obstruction lists in developed practice, but an Indian exam stem may expect tuberculosis and hernia in the differential — read the question's country. The barrier-agent answer omits the anastomotic caveat (not wrapped around fresh joins), and the therapeutic question trips candidates into answering "prophylactic adhesiolysis" — never justified. Finally, the classic viva ask is why laparoscopy causes fewer adhesions: less peritoneal drying and raw area, and less foreign-body contact.
Frequently asked questions
What initiates adhesion formation?
A fibrin-rich exudate after peritoneal injury that fibrinolysis fails to clear, organised by fibroblasts into permanent bands. Ischaemic and inflamed peritoneum favours formation.
What is the leading cause of small bowel obstruction in developed practice?
Post-operative adhesions, ahead of malignancy and hernia at the population level. In Indian practice tuberculosis and hernias remain major competitors.
Which barrier agents have trial evidence?
Hyaluronic acid-carboxymethylcellulose film and oxidised regenerated cellulose, placed at closure. They reduce adhesion formation but are costly and avoided around fresh anastomoses.
Does adhesiolysis prevent recurrence?
No — dissection re-injures peritoneum and new adhesions form in many. Surgery is reserved for obstruction, strangulation or defined indications such as infertility.
Why does laparoscopic surgery cause fewer adhesions?
Less drying and handling of viscera, smaller raw areas and less foreign-body contact. Reduced, not eliminated — port-site and intra-abdominal adhesions still occur.