OT notes · General Surgery

Incision and drainage of abscess

Usual anaesthesia
General or regional (spinal for buttock, perianal and lower limb abscesses); local infiltration often works poorly in inflamed tissue
Position
Depends on site: supine, prone, lateral or lithotomy
Setting
emergency

Operative note template for incision and drainage of a superficial or perianal abscess, with a filled example for a gluteal abscess in a diabetic patient drained under spinal anaesthesia.

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Blank template

Follow this order in the case sheet. Tick the options that apply and fill the blanks.

Patient and case

  1. Name / Age / Sex
  2. UHID / IP no. / Ward-Bed
  3. Date of surgery / OT no.
  4. CaseElectiveEmergency (non-elective)if emergency, state urgency and reason
  5. Timesin OT ___ anaesthesia start ___ incision ___ closure ___ out of OT ___

Team

  1. Operating surgeonname, designation
  2. Assistant(s)
  3. Supervising consultantpresent in OT / available / not applicable
  4. Steps done by the residentwhole procedure / named steps, under whose supervision
  5. Anaesthetist
  6. Scrub nurse / circulating nurse

Diagnosis and procedure

  1. Pre-operative diagnosis
  2. Post-operative diagnosis
  3. Procedure planned
  4. Procedure performedif different from plan, state why
  5. Extra procedure done and reason'none' if none. Only to save life or health if not consented

Consent and safety checks

  1. Informed consentGeneralProcedure-specificHigh-riskAnaesthesiain a language the patient understands: language ___ witness ___
  2. Site / side markedYesNot applicable
  3. WHO Surgical Safety ChecklistSign inTime outSign out
  4. Antibiotic prophylaxisdrug, dose, route, time given before incision
  5. VTE prophylaxisMechanicalPharmacologicalNot indicated

Risks to explain in the consent for this operation

  • pus collecting again (residual or recurrent abscess), needing a second drainage
  • bleeding from the cavity
  • open wound needing daily dressings until it heals
  • scar
  • spread of infection and sepsis
  • sinus or fistula formation (for perianal abscess, a fistula may need later surgery)
  • injury to nearby nerves or vessels
  • an underlying tumour or other cause found later

Pre-operative details for this operation

  1. Site and size of abscessside, region, size in cm, pointing, fluctuation, induration, cellulitis margin
  2. Duration and systemic featuresdays of swelling, fever, pulse, signs of sepsis
  3. Predisposing conditionsdiabetes (RBS / HbA1c), HIV, steroids or immunosuppression, injection site, trauma
  4. Imaging or aspiration before incisionNot needed (superficial, pointing)USG doneCT / MRI done (deep or near vessels)a deep swelling near a major vessel may be an aneurysm or sarcoma
  5. Antibiotic started before drainagedrug, dose, time
  6. Perianal abscess only: proctoscopy / known fistulaNot applicableProctoscopy doneKnown fistula

Anaesthesia and position

  1. AnaesthesiaGeneralSpinalLocal infiltration (small superficial abscess)
  2. PositionSupineProneLateralLithotomyProne jackknife

Operative findings

  1. Pusvolume in ml, colour, consistency, smell
  2. Cavitysize and depth in cm, loculi, extensions
  3. Deepest layer reachedSubcutaneousSubfascialIntramuscularIschiorectal fossaOther
  4. Necrotic tissue or sloughNonePresent, debrided
  5. Perianal only: internal opening seenNot applicableNone seenPresent (clock position)
  6. Anything unusualsolid tissue, foreign body, bone, pulsatile cavity

Procedure (steps)

  1. Skin preparation and drapingantiseptic used
  2. Diagnostic aspirationPus aspirated with needle and syringeNot done (obvious pus)
  3. IncisionLinearCruciateEllipticalsite (most fluctuant point, near anal verge for perianal), length, direction (along skin lines, parallel to nerves and vessels)
  4. Cavity openedpyogenic membrane opened with sinus forceps (Hilton's method)
  5. Pus sampleSent for culture and sensitivitySent for Gram stain, culture and sensitivity, AFB
  6. LoculiBroken down with finger / sinus forcepsNot disturbed (perianal: digital breakdown avoided)
  7. DeroofingSkin edges / cruciate flaps excisedNot neededso that the skin does not close before the cavity
  8. Debridement of sloughDoneNot needed
  9. Cavity washedNormal salinePovidone-iodine and salineHydrogen peroxide and saline
  10. HaemostasisPressureCauteryPack

Closure, drains and dressing

  1. WoundLeft open to heal by secondary intentionLoosely approximated over drain
  2. Pack or drainPovidone-iodine gauze packCorrugated drainGauze wickNonenumber of pieces placed, so all are removed later
  3. Dressingtype

Specimens and implants

  1. Pus for culture and sensitivitySentNot sent (reason)
  2. Tissue from cavity wall for HPENot neededSent (cavity looked unusual / recurrent abscess)

End of procedure

  1. Estimated blood lossml
  2. IV fluids and blood / products givenfluids (ml); blood: type, units, bag nos.
  3. Swab, needle and instrument countCorrectIncorrect: action taken
  4. Intra-operative complications / difficultieswhat happened and what was done; 'none' if none
  5. Implant stickersNo implantAffixed in case sheet, OT register and for discharge summary
  6. Condition at end of surgery / shifted toPACUWardICU/HDU

Post-operative orders

  1. Vitals and temperaturefrequency; watch for sepsis
  2. Antibioticsdrug, dose, route; change once culture report is back
  3. Blood sugarmonitoring schedule and control plan if diabetic
  4. Pack removal and first dressingwhen; count pieces removed against pieces placed
  5. Daily dressingtype; look for fresh pus, spreading redness, slough
  6. Analgesiadrug, dose, frequency
  7. Perianal abscesssitz bath, stool softener, review with proctoscopy for a fistula
  8. Follow-upculture and HPE report, wound check dates

Signature

  1. Name and designation of person writing note
  2. Medical Council registration no.
  3. Signature / date / time of writingwrite before the patient leaves recovery

Worked example

Fictional case: Mr. P.D., 56 years, known type 2 diabetic on oral drugs, 6-day history of painful swelling of the right buttock with fever, fluctuant 8 x 6 cm swelling in the upper outer quadrant.

Case details

Date: 09/07/2026. Emergency. OT 4.

Admitted 17:40. In OT 21:05. Spinal given 21:12. Incision 21:20. Procedure ended 21:40.

Surgeon: Dr A. (1st-year resident, General Surgery). Assistant: Dr B. (intern). Senior resident: Dr C., present in OT.

Anaesthetist: Dr D. Scrub nurse: Sr E.

Indication and pre-op

Indication: right gluteal abscess, 8 x 6 cm, fluctuant, with 2 cm of cellulitis around it. Temperature 38.6 degrees C, pulse 104/min.

RBS 286 mg/dl at admission. Physician opinion taken, insulin started as per physician. Hb 12.1 g/dl, TLC 16,400/cumm. Serum creatinine 1.0 mg/dl.

No imaging needed: superficial, pointing abscess, away from major vessels.

Consent: general, procedure-specific and anaesthesia consent taken in Gujarati. Open wound, daily dressings and recollection explained.

WHO checklist sign in and time out done. Inj amoxicillin-clavulanate 1.2 g IV given in casualty at 18:15.

Anaesthesia and position

Under spinal anaesthesia, patient in left lateral position. Parts painted with povidone-iodine and draped.

Findings

About 90 ml thick, yellow, foul-smelling pus.

Subcutaneous cavity 7 x 5 cm, 4 cm deep, with two loculi. Gluteal fascia intact. Small amount of slough on the cavity floor. No foreign body. No solid tissue.

Procedure

Pus confirmed by aspiration with an 18 G needle.

Linear 5 cm incision over the most fluctuant point, along the skin lines.

Pyogenic membrane opened with sinus forceps. Pus drained. Sample taken in a sterile container for Gram stain, culture and sensitivity.

Loculi broken down with the finger. Slough removed. Skin edges trimmed to deroof the cavity.

Cavity washed with normal saline. Haemostasis by pressure.

Closure

Wound left open. Cavity loosely packed with one roll of povidone-iodine gauze (one piece). Dressing applied.

Specimens

Pus for Gram stain, culture and sensitivity sent. No tissue for HPE.

End of procedure

Estimated blood loss 20 ml. No transfusion.

Mop and instrument count correct, confirmed by scrub nurse. One gauze roll left in the wound, recorded.

No intra-operative complications.

Shifted to ward in stable condition. Pulse 96/min, BP 130/80 mmHg.

Post-op orders

Temperature, pulse and BP 4-hourly.

Inj amoxicillin-clavulanate 1.2 g IV 8-hourly. Review with culture report.

RBS before meals and at bedtime. Insulin as per physician.

Tab paracetamol 1 g orally 6-hourly for 3 days.

Oral fluids after 2 hours, diabetic diet after that.

Pack removal and first dressing on POD 1, then daily dressing.

Signature

Dr A., JR-1, General Surgery. Reg. no. ________. 09/07/2026, 21:55.

Must document for this operation

  • Exact site, side and size of the abscess and of the incision. The next doctor needs to know what was opened and where, if the swelling recurs or a second collection appears.
  • Volume and nature of pus, and that a sample was sent for culture. The culture guides the change of antibiotic, and the audit checks that a sample was taken.
  • Number of packs or drains left in the wound. A retained gauze piece is a known cause of a non-healing wound and a medicolegal claim.
  • Blood sugar and other predisposing conditions. Poor control explains slow healing or recurrence and must be treated along with the abscess.
  • Any unusual finding such as solid tissue or a pulsatile cavity. A tumour or aneurysm can look like an abscess, and the note shows that this was looked for.
  • For a perianal abscess, whether an internal opening was seen. Many perianal abscesses are linked to a fistula, and the patient must be told a second operation may be needed.

Common mistakes in these notes

  • Writing 'I&D done, pus drained' with no volume, cavity size or site.
  • Not recording the number of gauze pieces packed into the cavity.
  • Forgetting to note that pus was sent for culture.
  • Not writing the blood sugar in a diabetic patient.
  • For perianal abscess, not warning about a possible fistula and not planning review.

Indian practice and paperwork

  • The NQAS district hospital OT checklist expects that braided biological sutures are not used in dirty wounds. Avoid them in an abscess cavity. (NQAS Assessor's Guidebook for District Hospitals 2020, Vol I, OT checklist ME E15.3)
  • Bio-Medical Waste Management Rules 2016 put excised human tissue in Yellow category (a) human anatomical waste, and discarded formalin is chemical waste. Write where the specimen went: sent for HPE in formalin, given to relatives with a note, or discarded as Yellow (a) waste. (DGHS/CPCB Guidelines for Management of Healthcare Waste as per BMW Rules 2016)

Sources

  • Bhat SM. SRB's Surgical Operations: Text and Atlas. Jaypee; 2014, Ch 7, Basic surgical procedures: Abscess drainage; Ch 9, Principles of surgical treatment in infections: Drainage of an abscess; Ch 25, Anorectal abscess, pp. 133-134, 235, 1030-1031.
  • Moran B, Mittal R, Lord A, eds. Farquharson's Textbook of Operative General Surgery. 11th ed. CRC Press; 2026, Ch 4A (infected sebaceous cyst), Ch 5 (breast abscess), Ch 15 (perianal and ischiorectal abscess), pp. 45, 64, 314-316.
  • Scott-Conner CEH, ed. Scott-Conner and Dawson Essential Operative Techniques and Anatomy. 4th ed. Wolters Kluwer; 2014, Ch 123, Management of perirectal abscesses, anal fistulas, and chronic anal fissure: Drainage of perirectal abscess, pp. 665-667.
  • NHS. How and when to take paracetamol for adults (1 g per dose, at least 4 hours apart, not more than 4 g in 24 hours). www.nhs.uk/medicines/paracetamol-for-adults/how-and-when-to-take-paracetamol-for-adults/
  • Bratzler DW et al. ASHP/IDSA/SIS/SHEA Clinical practice guidelines for antimicrobial prophylaxis in surgery. Am J Health-Syst Pharm 2013;70:195-283. Antibiotics for established infection are treatment, not prophylaxis (p. 8 of PDF). www.ashp.org/-/media/assets/policy-guidelines/docs/therapeutic-guidelines/therapeutic-guidelines-antimicrobial-prophylaxis-surgery.pdf
  • ICMR. Treatment Guidelines for Antimicrobial Use in Common Syndromes, 2nd ed., 2019. Ch 6 Skin and soft-tissue infections: Table 6.1 (abscess: clindamycin or ampicillin-sulbactam or amoxicillin-clavulanate, 5-7 days) and Table 6.5 (amoxicillin-clavulanate IV 1.2 g TDS). www.icmr.gov.in/icmrobject/custom_data/pdf/resource-guidelines/Treatment_Guidelines_2019_Final.pdf

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.

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