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Vacuum: A space in which the pressure is far below atmospheric pressure so that the remaining gases do not affect processes being carried on in the space.Vacuum Extraction, Obstetrical: Removal of the fetus from the uterus or vagina at or near the end of pregnancy with a metal traction cup that is attached to the fetus' head. Negative pressure is applied and traction is made on a chain passed through the suction tube. (From Stedman, 26th ed & Dorland, 28th ed)Vacuum Curettage: Aspiration of the contents of the uterus with a vacuum curette.Extraction, Obstetrical: Extraction of the fetus by means of obstetrical instruments.Obstetrical Forceps: Surgical instrument designed to extract the newborn by the head from the maternal passages without injury to it or the mother.Negative-Pressure Wound Therapy: The application of a vacuum across the surface of a wound through a foam dressing cut to fit the wound. This removes wound exudates, reduces build-up of inflammatory mediators, and increases the flow of nutrients to the wound thus promoting healing.Food Packaging: Containers, packaging, and packaging materials for processed and raw foods and beverages. It includes packaging intended to be used for storage and also used for preparation of foods such as microwave food containers versus COOKING AND EATING UTENSILS. Packaging materials may be intended for food contact or designated non-contact, for example, shipping containers. FOOD LABELING is also available.Suction: The removal of secretions, gas or fluid from hollow or tubular organs or cavities by means of a tube and a device that acts on negative pressure.Floors and Floorcoverings: The surface of a structure upon which one stands or walks.Abortifacient Agents, Nonsteroidal: Non-steroidal chemical compounds with abortifacient activity.Abdominal Wound Closure Techniques: Methods to repair breaks in abdominal tissues caused by trauma or to close surgical incisions during abdominal surgery.Housekeeping: The care and management of property.Desiccation: Removal of moisture from a substance (chemical, food, tissue, etc.).Atmospheric Pressure: The pressure at any point in an atmosphere due solely to the weight of the atmospheric gases above the point concerned.Preservation, Biological: The process of protecting various samples of biological material.