The principles and practice of obstetrics . Johnsons Perforator. with a small triangular point projecting at an anglewith the shaft. The perforator, however, most generally employedin England, France, and America, is Smellies Scis-sors. These scissors, as originally constructed, pre-sented a spear-shaped point, when the handles werein contact. Half of this extremity belonged to oneblade and half to the other; hence, the cutting edgeswere to the sides and exterior, while by closing theblades, two flat surfaces usually roughened were (263) EM HRYOTOM Y. ht into contact. This Bpear-shaped extremi
The principles and practice of obstetrics . Johnsons Perforator. with a small triangular point projecting at an anglewith the shaft. The perforator, however, most generally employedin England, France, and America, is Smellies Scis-sors. These scissors, as originally constructed, pre-sented a spear-shaped point, when the handles werein contact. Half of this extremity belonged to oneblade and half to the other; hence, the cutting edgeswere to the sides and exterior, while by closing theblades, two flat surfaces usually roughened were (263) EM HRYOTOM Y. ht into contact. This Bpear-shaped extremity was about an inch in length and three-quarters wide gular form; a screw fixed on the internal surface ofthe movable branch enters a notch in the opposite Fig. Smellics Scissors. at its base, where there were two projecting flat sur-faces or shoulders, which acted as guards to arrest theprocess of perforation. A slight curve is given tothe pointed extremity, so that it is slightly convex onthe one side and concave on the other. The instrument has been somewhat modified of late,in having each blade surrounded by a triangular spear-pointed extremity, sharp on either side. Hence, whenthe handles are closed, the inner edges overlap eachother and operate as common scissors; while the exte-rior edges cut when the handles are opened. This instrument must be used with great care, as itssharp cutting edges may very readily come into con-tact with the mothers tissues when these are muchswollen or contracted. A very excellent improvement of Smellies scissors,has been made by Mr. Holmes, who caused the long Fig. 49.
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Keywords: ., boo, bookcentury1800, booksubjectobstetrics, booksubjectpregnancy
