A manual of operative surgery . he bases of those bones. II. Amputation Through the Medio-tarsal Joint(Choparts Operation) This consists of a disarticulation of the foot at the medio-tarsal joint. The procedure that at the present day is known bythis name differs somewhat in detail fromthe operation as originally described byChopart. Anatomical Points.—The medio-tarsal joint•consists of two articulations—the calcaneo-cuboidon the outer side, and the astragalo-scaphoid onthe inner. These two joints have distinct syno-vial membranes. They lie nearly in a transversefine, but the astragalo-scaphoi
A manual of operative surgery . he bases of those bones. II. Amputation Through the Medio-tarsal Joint(Choparts Operation) This consists of a disarticulation of the foot at the medio-tarsal joint. The procedure that at the present day is known bythis name differs somewhat in detail fromthe operation as originally described byChopart. Anatomical Points.—The medio-tarsal joint•consists of two articulations—the calcaneo-cuboidon the outer side, and the astragalo-scaphoid onthe inner. These two joints have distinct syno-vial membranes. They lie nearly in a transversefine, but the astragalo-scaphoid joint is moreconvex anteriorly, and is a little in advance ofthe companion articulation. The first-named fig. 390.—bones ofarticulation forms a ball-and-socket joint, the THE KOOT- convex head of the astragalus being secured in k amputation.°parthe concave facet of the scaphoid (Fig. 390).The greatest vertical measurement of the articulation is one inch,while its greatest transverse measurement is about the same. The. 58o AMPUTATIONS [PART VI following ligaments support the joint : (i) The astragalo-scaphoid,a thin dorsal ligament ; (2) the inferior calcaneo-scaphoid, a dense,thick fibrous plate, that lies just under the joint ; (3) the externalcalcaneo-scaphoid. This band lies in the hollow between the twojoints of the mediotarsal line. It starts from the os calcis, andblends above and below with the two ligaments already named. Itis called by the French the Y ligament, la clef de larticulation deChopart. The synovial membrane of thisjoint is common also to the anterior astragalo-calcaneal articulation. The calcaneo - cuboid joint presents aconcavo-convex surface, the concavity inclin-ing from above downwards and inwards. Itmeasures about three-quarters of an inchvertically and one inch transversely. It issupported by the following ligaments :—(1}The internal calcaneo-cuboid, a strong band;(2) the dorsal calcaneo-cuboid, a widerligament ; and (3) and (4), the well
Size: 1274px × 1961px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksub, booksubjectsurgicalproceduresoperative
