Operative surgery . inch in depth, and may extend halfway up theforehead. They are commonly separated in the median line from eachother by a bony septum, are lined with mucous membrane, and communi-cate freely with the nasal cavity through the infundibuluni. Tlie Operation of Opening a Frontal Sinus.—Shave and cleanse thesupraorbital area thoroughly, administer an anaesthetic, and place the patienton the back with the shoulders raised and the head extended; make anincision from the center of the supraorbital ridge inward along the upperborder of the eyebrow to the median line above the root of
Operative surgery . inch in depth, and may extend halfway up theforehead. They are commonly separated in the median line from eachother by a bony septum, are lined with mucous membrane, and communi-cate freely with the nasal cavity through the infundibuluni. Tlie Operation of Opening a Frontal Sinus.—Shave and cleanse thesupraorbital area thoroughly, administer an anaesthetic, and place the patienton the back with the shoulders raised and the head extended; make anincision from the center of the supraorbital ridge inward along the upperborder of the eyebrow to the median line above the root of the nose; raiseand push aside the periosteum, and with a chisel or mallet make a smallopening through the anterior wall of the cavity (Fig. 2;T) ; cleanse the sinusthoroughly and remove the diseased products. The wound of the soft partsshould be closed at once, except at the inner angle, which is left- open fordrainage purposes. If the infundibuluni be patent the external wound may UlKKATIUNS. 1281. Fig. -Draining frontal sinus intoj)hiirynx. be entirely closed at once. It is bettor, bowever, to introduce a .trand ortwo of silkworm gut tlirougb the canal into the nasal cavity, leaving theupper ends exposed at the angle ofthe wouiul for two or three daysbefore removal, than to rely at onceon the uncertainties of the nuiinte-nance of drainage along narrow chan-nels lined with mucous membranewith tickle characteristics. Whenextensive disease is present requiringmuch time for cure, it is wise to drainthrough into the nose or pharynxwith a tube of considerable size (). The Comments.—All that is prac-ticable should be done to preventscarring and infiltration of the loosetissues about the orbit. The eyesshould be carefully protected fromthe discharges and from the anti-septic liuids employed in the treatment. The infundibulum runs down-ward and backward for a short distance, tlien turns shar])ly forward anddownward, and enters the uasal cavity—fact
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