Find the maxillary sinus natural and expand. The maxillary sinus positioning is very important, sometimes see sinus under endoscopy is also difficult to directly.

    (1) the maxillary sinus openings in the sieve between bubble and hook tu, removal of the hook can be under endoscopy look after, with curved curet or bent head along the inferior turbinate attractor to probe carefully, if there is a purulent discharge, or a small bubbles, usually is the location of the maxillary sinus natural openings.

    (2) sinus natural mouth may be nearby polyps, granulation or sticky secretions such as cover, the visible sinus after cleaning. Is not easy to identify the cause of the maxillary sinus natural openings are as follows: a. cover or closed maxillary sinus mucosa lesion natural openings; B. hook process areas cover downward maxillary sinus openings; C. scar narrow maxillary sinus natural openings. Complete removal of the hook by the tail bone is the key to find and expand the maxillary sinus natural.

    (3) it is difficult to identify if the maxillary sinus natural openings, can use the 5 mm maxillary sinus puncture needle casing by the fangs nest stab into the maxillary sinus, insert the endoscopy, under the bright in the nasal passages to probe natural openings, and is helpful to reduce eye complications. With bent head attractor or within the probe is inserted into the maxillary sinus after can use scissors and the clamp forward respectively, after zhang to bite bite in addition to the inner wall of the maxillary sinus and membrane, and then remove the natural openings under the wall.

    Expand the maxillary sinus natural to 1.5 cm x 1.5 cm, maintain the natural mouth mucosa intact on the wall is one of the important measures to prevent natural mouth postoperative stricture. If meet the maxillary sinus vice, vice mouth shall be connected with the natural openings. Don't ring to expand maxillary sinus openings, so as to avoid postoperative annular narrow. Forward to expand maxillary sinus openings, careful not to damage the nasolacrimal duct. Nasolacrimal duct bone wall hard, easy to recognize.

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