. Minor and operative surgery, including bandaging . ion ofsupracondyloid osteotomy the kneeis flexed and supported on a sand-bag. A longitudinal incision oneinch in length is made half an inchanterior to the tendon of the ad-ductor magnus and a finger-breadthabove the internal condyle; the knifeis carried down to the bone, and be-fore it is withdrawn an osteotome isintroduced and its edge turned so asto divide the bone transversely. Thesection of the bone is accomplishedby the use of the osteotome andmallet. After the bone has beendivided, the deformity is corrected,the wound closed, and the
. Minor and operative surgery, including bandaging . ion ofsupracondyloid osteotomy the kneeis flexed and supported on a sand-bag. A longitudinal incision oneinch in length is made half an inchanterior to the tendon of the ad-ductor magnus and a finger-breadthabove the internal condyle; the knifeis carried down to the bone, and be-fore it is withdrawn an osteotome isintroduced and its edge turned so asto divide the bone transversely. Thesection of the bone is accomplishedby the use of the osteotome andmallet. After the bone has beendivided, the deformity is corrected,the wound closed, and the limb putup in a plaster-of-Paris dressing in the corrected for Bowlegs.—To correct this deformity,the tibia and fibula are divided at the point of greatestbowing with an osteotome. The fibula is divided firstwith an osteotome entered through a puncture over thefibula, and next the tibia is divided in the same bones being divided, the deformity is corrected andthe limb put up in a plaster-of-Paris dressing in the cor-. A. Epiphyseal line. of bone section insupracondyloid osteotomy. TREPHINING THE SKULL. 557 rected position. Osteotomy may also be employed to cor-rect deformities in other bones, or for the deformity result-ing from fractures united in faulty position. TREPHINING THE SKULL. This is an operation in which a disk of bone of theskull is removed by a circular saw or trephine to exposethe membranes and the brain. If a wound is alreadypresent in the scalp, exposing the skull, as in the case ofcompound fracture of the skull, it is exposed and bared,so that the crown of the trephine may be placed fairly onthe bone; if no wound exists, a U-shaped flap is made,including all the structures down to thebone. The base of the flap should be Fig. 469. so situated as to contain a sufficientblood-supply, and the flap should beso planned as to favor drainage fromthe wound. When the bone has beenexposed, the trephine is placed withthe centre pin p
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