Annual and analytical cyclopaedia of practical medicine . Fig. IG.—Potts fracture, showing outwarddisplacement. [Imerican Text-book of Sur-(jery.) are pathognomonic signs of this tender points lie over the then typ-ical linos of fracture, as shown diagram-matically in Fig. 18. The posterior por-tion of the articular surface of the tibiamay also be crushed. Rupture of thedeltoid and tibio-fibular ligaments mayreplace the tibial fractures. The typicaldeformity is caused by the loss of thenormal support to the inner side of thefoot, and tibio-fibular diastasis, whichallows the astr
Annual and analytical cyclopaedia of practical medicine . Fig. IG.—Potts fracture, showing outwarddisplacement. [Imerican Text-book of Sur-(jery.) are pathognomonic signs of this tender points lie over the then typ-ical linos of fracture, as shown diagram-matically in Fig. 18. The posterior por-tion of the articular surface of the tibiamay also be crushed. Rupture of thedeltoid and tibio-fibular ligaments mayreplace the tibial fractures. The typicaldeformity is caused by the loss of thenormal support to the inner side of thefoot, and tibio-fibular diastasis, whichallows the astragalus to slip backward,sometimes so far that it may be quitebehind the tibia. If the displacement isnot great the patient can walk, though 314 FRACTURES. LEG. FOOT. painfully. The fracture of the internalmalleolus may be compound. Treatment.—To effect reduction thefoot must be forced forward and inward,and immobilized in inversion. To main-tain reduction posterior and externalplaster-of-Paris splints are very service-. Fig. 17.—Potts fracture, showing also back-ward displacement. (Amerivan Teit-hook of able, the former to extend from the iipperthird of the leg to the toes, the latterfrom the same level down to and aroundthe foot, ending at the outer side of thedorsum, the so-called uncomplicated cases the patient maybe allowed to get about on crutches assoon as the primary swelling has abated—a new splint being then necessary—and after that need only be seen oftenenough to forestall any recurrence of thedeformity. It is in Potts fracture thatambulatory splints are most likely to beof practical use. Some patients can walkwith only the support of a shoe, for, aswe have seen, the deformity is angular,outward, and backward, and as long asthis angular deformity is prevented thefunctions of the limb are but little im-paired. A plaster incasement fortifiedon the outer side and behind may meetthe indications very satisfactorily. Itshould extend from the toe
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