Surgery; its theory and practice . xtensor muscle,such as is exerted by a person to regain the upright position whenhe feels himself slipping backwards, the knee being then semi-flexed, and the patella unsupported. They are sometimes caused?by direct violence, as a blow or fall upon the knee. State of theparts.—When due to muscular action the line of the fracture istransverse (Fig. 195), the aponeurotic covering is usually torn,and the upper fragment generally drawn some distance from thelower by the action of the quadriceps extensor. When due todirect violence it is more often starred or vert
Surgery; its theory and practice . xtensor muscle,such as is exerted by a person to regain the upright position whenhe feels himself slipping backwards, the knee being then semi-flexed, and the patella unsupported. They are sometimes caused?by direct violence, as a blow or fall upon the knee. State of theparts.—When due to muscular action the line of the fracture istransverse (Fig. 195), the aponeurotic covering is usually torn,and the upper fragment generally drawn some distance from thelower by the action of the quadriceps extensor. When due todirect violence it is more often starred or vertical (Fig. 196), andthe aponeurosis being intact, there is little or no separation. Inany case the fracture, of course, extends into the joint. Methodof utiion.—When the fracture is transverse, union is generallyfibrous or membraneous, rarely osseous, in consequence of the THE PATELLA. 453 fragments being separated, probably in part by muscular con-traction, and in part by the effusion of blood, and later of serous Fig.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectsurgery, bookyear1896
