Perianal Abscess I&D

General AnaesthesiaDuration30 minutesUpdatedJun 2026

Propofol200mg
Fentanyl100mcg or Alfentanil2000mcg
AirwayLMAiGel

Before KTS

Propofol20mg, 30 secs
or
fentanyl50mcg, 5 mins
or
alfentanil500mcg, 30 secs

Maintenance

SevofluraneMAC 1.2

Other

Antibiotics as required
Ondansetron4mg
Dexamethasone6.6mg

FentanylRecovery Use Only
Paracetamol1g
Ibuprofen400mg
Dihydrocodeine30mg, PRN
Ondansetron4mg
Cyclizine50mg

For reference only. Always check doses against the BNF and your local protocols, and adapt to the patient in front of you. Gas Cookbook is community-shared guidance, not medical advice; clinical responsibility stays with you.

Technique

Volatile

By Jeremy Chui

Induction

Intra-op

Post-op