. Local and regional anesthesia : with chapters on spinal, epidural, paravertebral, and parasacral analgesia, and on other applications of local and regional anesthesia to the surgery of the eye, ear, nose and throat, and to dental practice. Fig. 158.—Conductive anesthesia by way of infra-orbital foramen. (After Fischer.). Fig. 150.—Resulting area of,anesthesia after blocking both infra-orbital nerves at infra-foramen. (Braun.) to progressively anesthetize the deeper parts of the nerve as they arereached bv the needle; \ dram of solution used in this way will often 49 2 LOCAL ANESTHESIA flow b
. Local and regional anesthesia : with chapters on spinal, epidural, paravertebral, and parasacral analgesia, and on other applications of local and regional anesthesia to the surgery of the eye, ear, nose and throat, and to dental practice. Fig. 158.—Conductive anesthesia by way of infra-orbital foramen. (After Fischer.). Fig. 150.—Resulting area of,anesthesia after blocking both infra-orbital nerves at infra-foramen. (Braun.) to progressively anesthetize the deeper parts of the nerve as they arereached bv the needle; \ dram of solution used in this way will often 49 2 LOCAL ANESTHESIA flow back into the canal for some distance and anesthetize the nervefar beyond the field of operation. After anesthetizing in this way, thebony opening to the canal can be enlarged and the nerve reached fur-ther back and excised; divulsion may also be practiced in a limitedway, but this method of anesthesia is not suited to severe tractionupon the nerve.
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