A manual of the modern theory and technique of surgical asepsis . re con-fidence, is to boil the catgut in alcohol. This isdone by putting the catgut in a strong glass bottlecontaining alcohol. After the tightly-closed bottlehas been kept in boiling water for fifteen minutesthe catgut is assumed to be sterile, according tobacteriological examinations on artificial soil madeof catgut so treated. The chance of the catgutbeing well sterilized is increased by repeating theboiling process on several days in devised an apparatus (Fig. 35) which, 1 Die Grundlagen der Aseptik. STERI
A manual of the modern theory and technique of surgical asepsis . re con-fidence, is to boil the catgut in alcohol. This isdone by putting the catgut in a strong glass bottlecontaining alcohol. After the tightly-closed bottlehas been kept in boiling water for fifteen minutesthe catgut is assumed to be sterile, according tobacteriological examinations on artificial soil madeof catgut so treated. The chance of the catgutbeing well sterilized is increased by repeating theboiling process on several days in devised an apparatus (Fig. 35) which, 1 Die Grundlagen der Aseptik. STERILIZATION OF CATGUT, SILK, ETC. 127 he claims, renders catgut absolutely sterile, useful,and durable. After having extracted the fat fromthe o-ut with ether, he winds it on metal rolls are placed in the metal box, whosecover is hermetically closed, so that no dust canenter. The amount of catgut needed only at onetime is drawn through a small hole in the side ofthe box and is cut off; thus the catgut remain-ing in the box continues uncontaminated, and. Fig. 36.—Braatzs apparatus for sterilizing catgut. therefore sterile. When it is proposed to sterilizecatgut the metal box containing it is put into thedry sterilizer (Fig. 36). The catgut can also bepreserved in the same box in which it has beensterilized. The principle of the operation of 128 SURGICAL ASEPSIS. Braatzs apparatus consists in the fact that onewall of a flat metal box filled with liquid paraffinlifts and lets fall a cone with the fall and rise ofthe temperature in the apparatus. The supplyof gas is thus automatically regulated, keeping auniform temperature, which is supposed to be animportant point in dry sterilization. A much favored way of preserving catgut inalcohol is to keep it in glass jars having hard-rubber caps (Fig. 37). The writer, however, pre-fers to use the metal box(Fig. 42), devised by himself,which is a modification ofBraatzs and which can alsobe used for silk (seep. 136).But even when
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectsurgery, bookyear1895
