Я правильно понимаю что здесь идет речь про стерилизацию инструментов?
и в начале sterile prep and drape - drape как простыня или салфетка?

Источник: http://medbe.ru/materials/operativnaya-urologiya/podgotovka-k-operatsii-v-urologii/

см. также
Sterile Preparation and Draping
Sterile prep and drape consists of a Surgical Sterile Drape Sheet (3M Health Care) being placed over the body caudal to the axilla of the operative extremity. The surgeon or circulating nurse then cleans the skin with ChloraPrep (CareFusion, San Diego, CA) or other desired solution. The scrubbed surgical assistant can use a sterile towel to pull the operative extremity cranially, thus exposing the axilla for further cleaning with ChloraPrep (CareFusion) or other desired solution. A sterile impervious U-Drape (9196 Shoulder Split Sheet with Pouch, 3M Health Care) is then placed across the neck and down the chest and back to isolate the sterile field, followed by a second impervious U-Drape across the axilla and up the chest and back. Another sterile green towel is folded lengthwise and wrapped around the nonsterile ACE elastic bandage, and then wrapped in sterile 3M Coban Wrap (3M Health Care) to maintain a sterile environment during the procedure.