A treatise on the operations of surgery : with a description and representation of the instruments used in performing them: to which is prefixed an introduction on the nature and treatment of wounds, abcesses, and ulcers . s wounded, the Effufion of Bloodwould not in all probability be mortal, (asI have (een. in two Inftances,) yet at beft itwould be very troublefome; and fince weare not ftraitened in that part of the Craniumfor room, I think it is advifeable to forbearoperating in this Place. The bony Sinufesof the Os Frontis, forbid the ufe of theTrepan near the Orbits of the Eyes; there-for
A treatise on the operations of surgery : with a description and representation of the instruments used in performing them: to which is prefixed an introduction on the nature and treatment of wounds, abcesses, and ulcers . s wounded, the Effufion of Bloodwould not in all probability be mortal, (asI have (een. in two Inftances,) yet at beft itwould be very troublefome; and fince weare not ftraitened in that part of the Craniumfor room, I think it is advifeable to forbearoperating in this Place. The bony Sinufesof the Os Frontis, forbid the ufe of theTrepan near the Orbits of the Eyes; there-fore if it mould be deprefled near thofe Ca-vities, the Surgeon mull be careful to perfo-rate either above, or on one fide of the Frac-ture ; for fawing below it, will only leadinto the Sinus, and anfwer no Purpofe inthe deiign either of giving a Difcharge tothe Matter from the Brain, or an opportu-nity to elevate the Depreflion j nay, perhapsleave an incurable Fiftula, if the Patientefcapes with Life. The Os Occipitis. being very uneven, bothifTits internal and external Surface, makesTrepanning there almoft impracticable; be-fides, the great Sinufes run about fo much ofit, as hardly to afford fpace to perforate with-. Operations c/Surgery, irx without danger ofwounding them j butthen it is fo defended from Injuries by itsSituation and Strength, that Fra&ures donot happen to it fo often as to the otherBones of the Cranium -, and when they do,for the mod part, they become fo foon mor-tal, by affecting the Cerebellum which itfuthins, that the Operation is feldom re-quired in this cafe. Indeed the upper An-gle of this Bone lies above the Cerebellum*and when fractured or depreffed, is not at-tended with fo immediate Danger ; but whenthis happens, the courfe of the longitu-dinal Sinus down the middle of it, andthe neighbourhood of the lateral Simijes be-neath it, make it advifeable to trepan at thelower part of the Os Parietale, or at leaf!upon or jufl below the Lambdoidal Suture9fo th
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