Surgical and obstetrical operations . ^ consist of blood or irri-gating fluids, and to facilitate their escape, irrigation shouldbe carried out with the poll elevated and the head flexed. Pirate IV. Trephining of Faciai, Sinuses. Cross section of the right half of the head ofa horse at the posterior border of the last , frontal sinus ; IM, lateral portion of inferiormaxillary sinus at extreme posterior or superiorpart ; IM^, median portion do. ; N, nasalchamber opposite the communication betweenit and the superior maxillary sinus ; NF, con-duit of superior maxillary branch of the trifac
Surgical and obstetrical operations . ^ consist of blood or irri-gating fluids, and to facilitate their escape, irrigation shouldbe carried out with the poll elevated and the head flexed. Pirate IV. Trephining of Faciai, Sinuses. Cross section of the right half of the head ofa horse at the posterior border of the last , frontal sinus ; IM, lateral portion of inferiormaxillary sinus at extreme posterior or superiorpart ; IM^, median portion do. ; N, nasalchamber opposite the communication betweenit and the superior maxillary sinus ; NF, con-duit of superior maxillary branch of the trifacialnerve ; S M, superior maxillary sinus ; M^,fragment of last molar. IM —. ~--—M TREPHINING OF THE FRONTAL SINUSES. 27 By studying Plates IV-VII it will be seen that any collec-tion of pus or other disease products at F would result in poordrainage so far as may be obtained by trephining throughthe external wall only, and consequently in order to com-plete it aside from that through the superior maxillary sinusan artificial communication between it and the nasal fossamay be made at ST, Plate VIII by a second opening oppo-site that point near the median line midway between F andN, Plate III, and then breaking through the thin walls ofthe turbinated bone b} means of a probe or other suitableinstrument and enlarging it sufficiently with the probepointed bistoury or with the finger. In locating the exactpoint for making this opening in the turbinated bone it isadvisable to pass a slightly curved heavy probe, a pair oflong curved uterine dressing forceps or some other slightlycurved and somewhat rigid instrument up the nostril tothe operative region and having
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Keywords: ., bo, bookcentury1900, bookdecade1900, booksubjectveterinarysurgery
