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Mapa, plataa, charta, ate may ba filmad at diffarant raduction ratioa. Thoaa too largo to ba antiraly includad in ona axpoaura ara filmad baginning in tha uppar iaft hand cornar, laft to right and top to bottom, aa many framaa aa raquirad. Tha following diagrama iilustrata tha mathod: Laa cartaa, planchaa, tablaaux, ate, pauvant Atra filmAa A daa taux da rAduction diff Arants. Loraqua la decumant aat trop grand pour Atra raproduit an un saul clichA, il aat filmA A partir da I'angia aupAriaur gaucha. da gaucha A droita. at da haut an baa, an pranant la nombra d'imagaa nAcaaaaira. llaa diagrammaa sulvants illustrant la mAthoda. 1 2 3 1 ^1 ">' JBXCISIOJJ or -THE ASTBAQALUS FOB INJUB,Y — KB. SQ^PBBBD. ^5 ON TWO CASES OF Ei^CISION OF THE ASTRAGALUS FOR INJURY. By Francis J. SBBPHinn, M.D. Hargeon to the Sfontr«al Qeneral Hoipital. The astragalus is not very frequently removed except in the course of the operation of exci^/ion of the ankle or for correcting the deformity in the severer forms of club-foot. The two cases narrated Jbelow have many points of interest. In both, in- jury necessitated the" operation ; in one case the traumatism caused dislocation wii > fracture, and in the other dislocation aflmijS. Both cases resisted all efforts at reductioQi, In c case this was apparently d^e to the fact that the tendon of the tiki^. U» noHticuB had in some way become tightly stretched over the outer surface of the astragalus and thus prevented its reduction. The case of fracture, which afterwards became compound, .esulted from jumping off a train whilst in motion, and within the last few years 1 have seen several cases which were due to the same cause, though in all these cases the fracture was simple. The patients recovered with useful feet but stitf ankle-joints, and with some deformity. In the cases of excision the result was much butter, and the patient could move about with more freedom and \ess limping, although there was more shortening. In the case 9f fracture, there was also dislocation of the anterior fragn ?nt. 'J he character of the fracture was of interest. The astra^^alus was broken into three pieces, the central portion corresponding to the part covered by the lower articular surface of the tibia. Thl* anterior portion was formed by the head and the posterior hy the projectmg portion of astragalus which is grooved for the tendon of the flexor longus hallucis muscle. Case I — Dislocation of the Astragalus, with fracture of the inner and outer malleoli of the ankle joint. — M. G., aged 25, % pedlar, was admitted into hospital July lOth, 1886, with the following history. On 27th May last fell out of a waggon and caught left foot in wheel ; in this way twisted ankle. On being r,eleased, found foot out of place and could not walk. Twelve Ijours after accident, was seen by Dr. H. Stevenson of Wako,- .y ' m i I i < i I „A— _^ J 90 MONTRSAL MEDICAL JOURNAL. field, Que^vbo, after getting foot in position, placed it in a box splint ; there was great fwelling. After sixteen days the foot keeper on one of the rail- way crossings. 1 am told that he walks without fatigue and without any limp. In this case removal of the bone was neces- sitated by the character of the fracture, for had the parts been left, the anterior and posterior fragments would surely have necrosed and led to greater tieublle. Ihe result of the case was in every way satisfactory. \\^