Trabeculectomy with MMC
- Usual anaesthesia
- Local: peribulbar or sub-Tenon block, or topical in cooperative patients
- Position
- Supine, head on ring, eye rotated down by a corneal traction suture, operating microscope
- Setting
- elective
Operative note template for trabeculectomy with mitomycin C (MMC), with a filled example for a fornix-based trabeculectomy in an eye with advanced primary open angle glaucoma.
Blank template
Follow this order in the case sheet. Tick the options that apply and fill the blanks.
Patient and case
- Name / Age / Sex
- UHID / IP no. / Ward-Bed
- Date of surgery / OT no.
- CaseElectiveEmergency (non-elective)if emergency, state urgency and reason
- Timesin OT ___ anaesthesia start ___ incision ___ closure ___ out of OT ___
Team
- Operating surgeonname, designation
- Assistant(s)
- Supervising consultantpresent in OT / available / not applicable
- Steps done by the residentwhole procedure / named steps, under whose supervision
- Anaesthetist
- Scrub nurse / circulating nurse
Diagnosis and procedure
- Pre-operative diagnosis
- Post-operative diagnosis
- Procedure planned
- Procedure performedif different from plan, state why
- Extra procedure done and reason'none' if none. Only to save life or health if not consented
Consent and safety checks
- Informed consentGeneralProcedure-specificHigh-riskAnaesthesiain a language the patient understands: language ___ witness ___
- Site / side markedYesNot applicable
- WHO Surgical Safety ChecklistSign inTime outSign out
- Antibiotic prophylaxisdrug, dose, route, time given before incision
- VTE prophylaxisMechanicalPharmacologicalNot indicated
Risks to explain in the consent for this operation
- pressure too low after surgery (hypotony), shallow or flat anterior chamber
- choroidal effusion or haemorrhage, including suprachoroidal haemorrhage
- bleb leak or wound leak
- bleb failure from scarring, needing needling, more drops or further surgery
- bleb infection (blebitis) and endophthalmitis, even years later
- cataract formation or progression
- bleeding into the anterior chamber (hyphaema)
- loss of vision in advanced glaucoma
- uncomfortable or overhanging bleb, drooping lid
Pre-operative details for this operation
- Eye to be operatedRight eye (RE)Left eye (LE)write in full; mark above the eyebrow of the correct eye
- Type of glaucoma and indicatione.g. POAG / PACG / secondary; failed or not tolerated medical or laser treatment; progression on fields
- Baseline measurementsbest-corrected vision, IOP with number of drops, cup-disc ratio, latest field (MD), gonioscopy
- Conjunctiva at the planned sitemobile / scarred; previous surgery
- Glaucoma drops and systemic acetazolamidewhat was stopped or continued before surgery
- Anticoagulants / antiplateletsstatus on the day
Anaesthesia and position
- AnaesthesiaPeribulbar blockSub-Tenon blockTopicaldrug, strength, volume, time, who gave it
- Preparationantiseptic, strength and contact time; lashes isolated
- TractionCorneal traction suturesuture material; eye rotated down to expose the upper quadrant
Operative findings
- Conjunctiva and Tenon'sthin / thick / scarred; buttonhole made or not
- Scleral thicknessnormal / thin
- Anterior chamber and irisdepth; iris came through the sclerostomy easily; ciliary processes seen or not
- Flow after flap closureSlow controlled flow, chamber maintainedExcess flow, extra sutures placedNo flow, sutures loosened
Procedure (steps)
- Quadrant and meridians markedsite (e.g. superior, 12 o'clock); marking pen
- Conjunctival flapFornix-based (limbal peritomy)Limbus-based (incision about 10 mm behind limbus)width; Tenon's separated from sclera; any buttonhole and how repaired
- Haemostasislight cautery to episcleral vessels
- Mitomycin Cconcentration (mg/ml), how applied (soaked sponges: number and size), where (on uncut sclera / under the scleral flap), time in minutes, kept away from conjunctival edge and cornea, sponges counted out, irrigation volume
- Scleral flapRectangularTriangularsize in mm, about half thickness, hinged at the limbus, dissected forward into clear cornea
- Paracentesisposition in clock hours
- Sclerostomyentered with a sharp blade; widened with Kelly Descemet punch (number of bites); stopped about 1 mm short of the flap sides
- Peripheral iridectomyDone, broad-basedNot done (reason)patent; ciliary processes and vitreous not disturbed
- Scleral flap suturesnumber, material (e.g. 10-0 nylon), fixed / releasable, position; titrated to flow
- Flow checkAC refilled with BSS through the paracentesis; flow at flap edges; chamber depth
Closure, drains and dressing
- Conjunctiva and Tenon'sFornix-based: secured to cornea at both ends (wing sutures) with or without mattress suturesLimbus-based: running closure, Tenon's and conjunctiva in one or two layerssuture material and size
- Bleb formed and leak testBSS through the paracentesis; bleb height and extent; Seidel test result
- Traction suture removed
- Subconjunctival / topical drugs at endonly if given: drug, dose, site (away from the bleb)
- Pad and shield
Specimens and implants
- SpecimenNoneIris / trabecular tissue sent for HPE (reason)
- Mitomycin Cstrength, batch number, prepared by whom, time made up
End of procedure
- Estimated blood lossml
- IV fluids and blood / products givenfluids (ml); blood: type, units, bag nos.
- Swab, needle and instrument countCorrectIncorrect: action taken
- Intra-operative complications / difficultieswhat happened and what was done; 'none' if none
- Implant stickersNo implantAffixed in case sheet, OT register and for discharge summary
- Condition at end of surgery / shifted toPACUWardICU/HDU
Post-operative orders
- Pad and shieldtill first-day review; shield at night; do not rub or press the eye
- First post-op reviewnext morning: vision, IOP, AC depth, bleb height and extent, Seidel test, hyphaema, choroidal effusion
- Steroid eye dropsdrug, frequency and taper as per unit regimen
- Antibiotic eye dropsdrug and frequency
- Glaucoma drops in the operated eyewrite which drops stop or continue in each eye, as decided by the consultant
- Low IOP / shallow chamberIOP below about 6 mmHg on two visits or a shallow chamber: inform consultant; cycloplegic, steroid taper, viscoelastic reformation as decided
- Suture managementplan for laser suture lysis or removal of releasable sutures if IOP rises
- Activityavoid rubbing, bending and heavy lifting at first
- Warning signspain, redness, discharge or drop in vision, now or years later: come the same day (bleb infection)
Signature
- Name and designation of person writing note
- Medical Council registration no.
- Signature / date / time of writingwrite before the patient leaves recovery
Worked example
Fictional case: Mr. P.D., 58 years, primary open angle glaucoma, right eye with IOP 28 mmHg on three drops, cup-disc ratio 0.9, field MD -18 dB and progressing.
Case details
Date: 22/04/2026. Elective. Eye OT 1.
Block given 09:40. Incision 09:55. Conjunctival closure completed 10:45.
Surgeon: Dr A. (3rd-year resident, Ophthalmology). Consultant: Dr C., scrubbed and assisting.
Scrub nurse: Sr E.
Indication and pre-op
Right eye (RE) POAG, IOP 28 mmHg on timolol, brimonidine and latanoprost. Vision 6/12. Cup-disc ratio 0.9. Field MD -18 dB, progressing over 1 year. Open angles on gonioscopy. Superior conjunctiva mobile, no previous surgery.
Not on anticoagulants.
Consent: general and procedure-specific consent taken in Gujarati, including hypotony, bleb leak, failure, lifelong bleb infection risk, cataract and loss of vision. RE marked above the right eyebrow.
WHO checklist sign in and time out done.
Anaesthesia and position
Peribulbar block, inferotemporal, 5 ml of lignocaine 1% with bupivacaine 0.375%, no adrenaline. Aspirated before injecting.
Supine, head on ring. Conjunctival sac irrigated with 5% povidone-iodine, lids painted, draped with lashes isolated. Speculum.
Corneal traction suture, 7-0 polyglactin, at 12 o'clock; eye rotated down.
Procedure
Superior quadrant, 12 o'clock, meridians marked.
Fornix-based conjunctival flap by limbal peritomy of about 6 mm. Tenon's insertion freed at the limbus. No buttonhole. Light cautery to episcleral vessels.
MMC 0.2 mg/ml: three soaked sponge pieces placed on bare sclera over a broad area behind the planned flap, for 2 minutes, conjunctival edge lifted clear. Sponges removed and counted (3 in, 3 out). Area washed copiously with BSS.
Rectangular scleral flap 4 x 4 mm, about half thickness, hinged at the limbus, dissected forward into clear cornea.
Paracentesis at 10 o'clock.
Sclerostomy entered under the flap with a sharp blade and widened with a Kelly Descemet punch, two bites, 1 mm short of each flap side.
Broad-based peripheral iridectomy. Patent. Ciliary processes not disturbed. No vitreous.
Scleral flap closed with two 10-0 nylon sutures at the back corners and one releasable 10-0 nylon suture. AC refilled with BSS through the paracentesis: slow controlled flow at the flap edges, chamber well maintained.
Closure
Conjunctiva drawn down to the limbus and fixed at each end to the cornea with 9-0 absorbable sutures, with one mattress suture between.
Bleb formed with BSS through the paracentesis: diffuse, moderate height. Seidel negative.
Traction suture removed. Pad and shield applied.
Specimens and drugs
No specimen.
MMC 0.2 mg/ml made up in OT by Sr E. at 09:30. Batch no. ________.
End of procedure
No intra-operative complications. AC deep at end.
Instrument, needle and sponge count correct, confirmed by scrub nurse.
Shifted to ward in stable condition. Pulse 80/min, BP 136/84 mmHg.
Post-op orders
Pad and shield till review tomorrow morning. Shield at night.
Right eye glaucoma drops stopped as advised by Dr C. Left eye drops unchanged.
From POD 1: steroid and antibiotic eye drops as per unit regimen.
Review POD 1: vision, IOP, AC depth, bleb, Seidel test, hyphaema, fundus for choroidal effusion. Inform Dr C. if IOP below 6 mmHg or chamber shallow.
Releasable suture to be removed at the slit lamp if IOP rises, as decided by consultant.
Come back at once if pain, redness, discharge or drop in vision, at any time in future.
Signature
Dr A., JR-3, Ophthalmology. Reg. no. ________. 22/04/2026, 11:00.
Must document for this operation
- MMC concentration, method, site, time of application and irrigation. Bleb leaks, thin blebs and late infection are linked to how much MMC was used, and the next surgeon needs this before any revision.
- Sponge count for MMC sponges, in and out. A retained sponge under the conjunctiva is a preventable error, and the count is the proof it was avoided.
- Type of conjunctival flap and closure sutures. A fornix-based flap leaks at the limbus and a limbus-based flap at the posterior wound, so the ward doctor knows where to look.
- Number of flap sutures and which are releasable. The post-op plan to raise flow depends on knowing which suture to cut or pull.
- Flow and chamber depth at the end. It is the baseline for judging hypotony or failure on day 1.
- Whether a peripheral iridectomy was done. It affects later management if the iris blocks the sclerostomy.
Common mistakes in these notes
- Writing 'MMC applied' with no strength or time.
- No sponge count for MMC sponges.
- Not recording releasable sutures, so no one knows they can be removed.
- Leaving out a conjunctival buttonhole that was repaired.
- Not writing which glaucoma drops to stop in the operated eye and which to continue in the other eye.
Indian practice and paperwork
- NABH expects the operative note to be written before the patient is moved out of recovery, and post-op care to follow a written plan. For a trabeculectomy the written plan should include which drops stop in which eye. (NABH 5th ed., COP.14(e) and (f))
Sources
- Clinical Atlas of Procedures in Ophthalmic and Oculofacial Surgery, Ch 34, Trabeculectomy (Palmberg PF, Myers JS), pp. 323-334.
- Clinical Atlas of Procedures in Ophthalmic and Oculofacial Surgery, Ch 35, Combined Phacoemulsification and Trabeculectomy (Figs 35.2, 35.3, 35.7); Ch 64, Pediatric Glaucoma Surgery (Table 64.2), pp. 336-339; 627.
- Steinert RF, ed. Steinert's Cataract Surgery. 4th ed. Elsevier; 2023, Ch 36, Phacoemulsification in the Glaucoma Patient (MMC sponge application; hypotony monitoring), pp. 323-324; 329.
- Clinical Atlas of Procedures in Ophthalmic and Oculofacial Surgery, Ch 1, Anesthesia for Cataract Surgery (peribulbar block volume), pp. 6.
Educational template for residents. Adapt it to your institution's case-sheet format and your consultant's instructions. Patient details in the example are fictional.
Videos of this operation
Teaching videos and pages for this operation, listed under the curriculum item that asks for it.