Antrosond consists of a fl exible transparent tube 160mm long, with an external diameter of 2,6mm, combined with
a 290mm non-allergic biomedical silicon thread (Mono Drain) inside. One end of the tube terminates in a universal
female luer lock, to which a syringe may be connected to inject normal saline solution if required. One end of the tie
has a rigid oval cap that engages with the tube to make asingle integral device.

INSTRUCTIONS FOR USE

Antrosond is used like a normal probe. When the fistula has been identifi ed, insert the hard oval end
of the Antrosond into the fi ssure. Proceed slowly along the entire tract, and hold the end of the silicone
thread near the entrance hole with one hand,and slide the tube out backwards with the other.
The tie is now correctly inserted and positioned for optimal drainage. After knotting the two ends you
can start to place the muscle bands under traction