FESS Instrument Set: Functional Endoscopic Sinus Surgery Guide

Functional endoscopic sinus surgery rewired what an ENT instrument tray looks like. Before the endoscope, sinus disease was reached through the face and the canine fossa with chisels and gouges. Today the surgeon works entirely through the nostril, watching a monitor fed by a 4 mm telescope, restoring the natural drainage pathways of the sinuses while leaving as much mucosa intact as possible. That “functional” philosophy — preserve, don’t strip — is the reason a FESS set is dominated by through-cutting and angled instruments rather than the crushing forceps of older sinus surgery.

This guide breaks down a complete FESS instrument set by function, covers the telescope angles that make each step possible, and explains the material and quality standards that keep these delicate, expensive instruments working list after list.

The endoscope is the first instrument

Every other tool in the tray is chosen to work alongside the telescope. A standard FESS set carries rigid Hopkins-rod endoscopes in three or four angles:

• 0° — the workhorse for the nasal cavity, middle meatus and sphenoid.
• 30° — the most-used angle overall, giving a view around the uncinate into the maxillary sinus ostium.
• 45° — for the maxillary sinus and frontal recess.
• 70° — reserved for the frontal sinus and the lateral maxillary wall.

Diameters are typically 4 mm for adults and 2.7 mm for paediatric or tight nasal cavities, in a 175–180 mm working length. The scope rides in the surgeon’s non-dominant hand for most of the case, so balance and a fog-resistant lens train matter as much as optical clarity.

Accessing the sinuses: the uncinate and the ostia

The first surgical step in most FESS cases is uncinectomy — removing the uncinate process to expose the maxillary sinus ostium. A sickle knife or a Freer elevator makes the initial incision, and a back-biting forceps (back-biter) removes the uncinate from below upward without damaging the orbit, which lies just lateral. A ball-tipped sinus seeker (Kuhn-Bolger probe) palpates and opens the natural ostia of the maxillary and frontal sinuses. This is precision work millimetres from the lamina papyracea — the paper-thin bone separating the ethmoid from the orbit — which is why the instruments are slim and the movements small.

Ethmoid dissection: the heart of the set

Opening the ethmoid air cells is where the FESS instruments earn their keep. The Blakesley-Wilde forceps, in straight, 45° up-biting and 90° patterns, grasp and remove ethmoid partitions. Their through-cutting siblings — through-cutting Blakesley and Tilley-Henckel forceps — cut cleanly through bony lamellae instead of avulsing them, which is the single most important habit for preventing mucosal stripping and post-operative scarring.

A mushroom (Kerrison-style) punch and a frontal sinus giraffe forceps (up-biting and side-biting, in cup and through-cutting versions) handle the frontal recess. The Stammberger antrum punch enlarges the maxillary antrostomy. Modern lists often add a microdebrider, but the hand instruments remain essential for the controlled, mucosa-sparing cuts a powered blade cannot always make safely near the skull base.

Core FESS instrument set: tray reference

Suction, packing and haemostasis

A bloodless field is everything in endoscopic sinus work because even a thin film of blood absorbs light and kills the view. A range of curved and angled suction tubes — Frazier pattern plus dedicated curved sinus suctions — clears the field continuously. Bayonet (Lucae) forceps place and remove packing and retrieve specimens for histology. Many sets include a malleable suction-Freer that doubles as elevator and suction in one pass, saving instrument changes in a narrow corridor.

How a FESS set differs from septoplasty and mastoid trays

The three ENT sets share a bench but solve different problems. A septoplasty tray is built around the Cottle and Freer elevators and the Jansen-Middleton resecting forceps for the septum; we cover it in detail in our septoplasty instrument set guide. A FESS set adds the endoscopes, through-cutting ethmoid and frontal instruments, and sinus seekers that septoplasty does not need. A mastoidectomy set moves into the temporal bone with curettes, drills and micro-ear instruments entirely absent from the sinus tray. Surgeons frequently run septoplasty and FESS in the same sitting, so theatres often stock the two as adjacent, clearly separated packs rather than one combined tray.

Material and quality standards for endoscopic instruments

FESS instruments are among the most demanding in the ENT inventory. The through-cutting jaws of Blakesley and giraffe forceps must shear bone cleanly thousands of times without dulling, so they are forged from hardenable martensitic stainless steel (AISI 420 grade) and precision-ground. Tube shafts, suctions and elevators favour AISI 304 for corrosion resistance through repeated steam cycles. Every instrument should conform to ISO 7153-1 for surgical stainless steel and be manufactured under an ISO 13485 quality system; for EU supply, CE marking under the Medical Device Regulation is mandatory.

Fizza Surgical manufactures endoscopic sinus and general ENT instruments to these standards in Sialkot, with full traceability documented on our certifications page. The broader range, including septoplasty and turbinate instruments, sits in our surgical instruments catalogue.

Reprocessing and longevity

Endoscopes and fine forceps are the items most often damaged in reprocessing, not in surgery. Telescopes need protective trays and gentle handling — a single knock can shatter the rod-lens train. Through-cutting forceps must be opened fully for ultrasonic cleaning so dried blood does not bind the cutting mechanism, then function-tested before reassembly into the tray. A blunt back-biter or a Blakesley that avulses instead of cutting should be pulled for sharpening, because the damage it does to mucosa shows up weeks later as scarring and recurrent obstruction. Tracking instrument condition through a counted, logged tray is the cheapest insurance a sinus list can buy.

Fizza Surgical is an ISO 13485-certified, CE-marked manufacturer of ENT, sinus and general surgical instruments in Sialkot, Pakistan, with more than 40 years supplying hospitals and distributors worldwide. To configure a FESS or combined ENT instrument set, reach our team via the surgical instruments catalogue.