. Regional anesthesia : its technic and clinical application . Fig. lU.—Field-block of the uf lip. infra-orbital block by the oral route is then performed by distributingthe solution on the anterior aspect of the maxilla in the immediate neigh-borhood of the infra-orbital foramen. A last injection is made beneaththe alse of the nose, while the needle is still in the gingivolabial fold,on one side in case of single hare-lip, on both sides in double hare-lip,using 5 of the same solution. The adrenalin contained in the solu-tion greatly controls the hemorrhage, and the anemic condition of th
. Regional anesthesia : its technic and clinical application . Fig. lU.—Field-block of the uf lip. infra-orbital block by the oral route is then performed by distributingthe solution on the anterior aspect of the maxilla in the immediate neigh-borhood of the infra-orbital foramen. A last injection is made beneaththe alse of the nose, while the needle is still in the gingivolabial fold,on one side in case of single hare-lip, on both sides in double hare-lip,using 5 of the same solution. The adrenalin contained in the solu-tion greatly controls the hemorrhage, and the anemic condition of thetissues changes entirely the aspect of the operation. The lower lip is anesthetized by introducing the needle through a OPERATIONS ON THE HEAD. Fig. 116.—Blocking of the lower lip and chin: A, Site of puncture on the lowerborder of the mandible, 3 cm. from the midline; A-1 and A-3 are submucous and sub-cutaneous injections; A-2 blocks the mental nerve close to the bone. wheal raised in the middle of the chin and infiltrating the soft tissuesobliquely upward toward the angle of the mouth (Fig. 115), advancing 142 REGIONAL ANESTHESIA the needle subcutaneously as well as submucously, with a finger in themouth serving as guide. From 10 to 15 of the 1 per cent, solutionis sufficient to produce anesthesia without distorting the operative mental block by the extra-oral route (page 109) is a procedurewhich has the advantage of being cleaner than the above describedwedge-shaped infiltration and of dismissing all possibilities of con-taminating the healthy tissues surrounding the lesion. If the lesionlies at the angle of the mouth, a very wide anesthetic field is obtained byblocking the mandibular nerve at the foramen o
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