FIELD: medicine.
SUBSTANCE: mucous membrane is incised in a projection of an operated sinus. An ultrasonic cutting instrument is used to cut out a U-shaped flap as a single fragment. A base of the cut out flap is cracked, and the sinus is exposed by bending the base. After the pathological content is removed, and the sinus is irrigated, the flap is placed back. The wound is closed. If using an extranasal approach, the flap is formed of bone, periosteum and soft tissues as a single fragment. The flap is bent upwards. If using an endonasal approach, the flap is formed of bone, periosteum, soft tissues and mucous membrane as a single fragment. The flap is bent upwards, downwards or backwards.
EFFECT: method enables reducing injuries, provides re-implant supply ensured by the U-shaped flap due to a narrowed base of the flap eliminates the need for additional fixation.
3 cl, 2 dwg, 1 ex
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