Manual of gynecology . s, 4. The bivalve of Cusco. We note under each its nature, the method of employing it, and thetheory of its action and uses. 1. The Sims or duckbill speculum is shown at Figs. 80, 81, and Plate V. Its Nature.—Each instrument in reality consists of two specula, whichare of different size and connected by a handle ; usually, however, we speakof these specula- as the blades of the speculum. The real Sims speculumis light, has each blade slightly concave on its anterior aspect, and has theblades at right angles to the intermediate handle. Modifications of Sims speculum are n
Manual of gynecology . s, 4. The bivalve of Cusco. We note under each its nature, the method of employing it, and thetheory of its action and uses. 1. The Sims or duckbill speculum is shown at Figs. 80, 81, and Plate V. Its Nature.—Each instrument in reality consists of two specula, whichare of different size and connected by a handle ; usually, however, we speakof these specula- as the blades of the speculum. The real Sims speculumis light, has each blade slightly concave on its anterior aspect, and has theblades at right angles to the intermediate handle. Modifications of Sims speculum are numerous. Indeed it seems dif-ficult for gynecologists to resist modifying an instrument, and very rare 116 MANUAL OF GYNECOLOGY. to find them improving it. The most widely known modification isBozemans ; it is heavier than Sims, has the blades meeting the handle atan acute angle, and the blades more concave on the anterior aspect.(Figs. 81 and 82.) One curious fact about almost all specula is, that they are too Fig. speculum. Sims blade is 4 inches long, though the posterior vaginal wall measuresonly 3^ inches. Thus, as we wish to expose only the anterior vaginal walland cervix uteri, a 3-inch length of blade is sufficient. A modification of Sims speculum, by Dr. Battey of Georgia, is worthy
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