Bipolar Bayonet Forceps 20cm

What it is

Bipolar bayonet forceps are 20cm insulated electrosurgical forceps that deliver bipolar radiofrequency current between the two tips of the instrument to coagulate small vessels and achieve haemostasis. Unlike monopolar diathermy, bipolar confines the electrical current path between the two tips only, eliminating dispersal through the patient's body and reducing the risk of collateral thermal injury. The bayonet shaft profile positions the tips clear of the handle axis, maintaining the operator's line of sight into the operative field during use in deep or narrow cavities.

When & how it's used

Used in ENT surgery for vessel coagulation and haemostasis during tonsillectomy, adenoidectomy, FESS, middle ear surgery, and nasal surgery. The bayonet profile is specifically designed for use in deep nasal, sinus, and middle ear spaces where a straight instrument handle would obstruct the surgical view through the endoscope or under the microscope. Connects to any standard bipolar electrosurgical unit (diathermy machine).

Bipolar electrosurgery is the standard of care for haemostasis in ENT surgery, particularly in procedures performed close to critical structures — the facial nerve in parotid and middle ear surgery, the internal carotid artery in skull base FESS, and the optic nerve in orbital decompression. The confined current path between the bipolar tips means that structures adjacent to the coagulated vessel are not exposed to the radiofrequency current, reducing the risk of thermal injury to nerve, brain, and orbital contents compared to monopolar diathermy.

The 20cm working length is appropriate for the majority of ENT procedures. The bayonet shaft offsets the tips from the handle axis by approximately 30°, replicating the ergonomics of a bayonet-profile suction cannula or nasal packing forceps — the surgeon’s hand is positioned comfortably outside the operative field while the tips work deep in the nasal or middle ear cavity without the handle blocking the endoscopic or microscopic view. The straight variant is used for superficial haemostasis in the oral cavity, oropharynx, and nasal introitus where direct access is available. Both variants are fully insulated to the tips to prevent inadvertent monopolar-mode tissue contact.

Design features

• Bipolar current delivery: Current confined between the two tips; no patient return electrode required; safe for use near critical structures.
• Bayonet shaft profile: Offsets the tips from the handle axis, maintaining the operator’s line of sight in deep nasal, sinus, and middle ear cavities.
• 20cm working length: Standard ENT length for reaching the middle meatus and middle ear from outside the face.
• Full insulation: The shaft is insulated to the tips, preventing inadvertent current conduction to the hand or adjacent structures.
• Standard bipolar connector: Compatible with all standard bipolar electrosurgical units.
• Reusable, autoclavable: Stainless steel construction for repeated use.

Frequently Asked Questions

What is the difference between bipolar and monopolar diathermy in ENT surgery? Monopolar diathermy passes current from the instrument tip through the patient’s body to a return plate electrode. Bipolar diathermy passes current only between the two tips of the forceps — the current loop is confined to the tissue grasped between the tips. Bipolar is safer near nerves and delicate structures and does not require a return electrode.

Why is the bayonet profile important in ENT bipolar forceps? The bayonet offset positions the tips 30° off the handle axis, which allows the surgeon to hold the instrument with the handle horizontal or slightly angled while the tips travel along the floor of the nasal cavity or into the middle meatus. If the shaft were straight, the handle would bisect the endoscopic field of view during deep nasal access.

What settings on the electrosurgical unit should be used for ENT bipolar coagulation? Settings vary by manufacturer and tissue type, but typical bipolar coagulation in ENT uses 15–30W with a pure coagulation waveform. The lowest effective power should be used to achieve haemostasis with minimal lateral thermal spread. Consult the specific electrosurgical unit’s recommendations for bipolar ENT use.

What is the advantage of the non-stick silver-coated version over standard stainless steel bipolar forceps? Standard stainless steel tips can accumulate coagulated tissue (eschar) during use, which sticks to the tips and requires cleaning between coagulations. The silver-coated non-stick version significantly reduces this adhesion, maintaining tip cleanliness and conductivity throughout the procedure and reducing interruptions.