Individual who has difficulty combating microorganisms and is at risk for developing an infection.

The sweat glands are small tubular structures situated within and under the skin. They discharge sweat by tiny openings in the surface of the skin. Sweat is sterile before it touches the bacteria on the skin.

Usually a small room around which two or more operating rooms may be grouped. Sub-sterile areas often contain cupboards for sterile supplies, a sterilizer, a warming cabinet for sterile solutions, a small sink, and a refrigerator for drugs.

Surgical Infection Society is an international professional organization focused on research, education, diagnosis, prevention and treatment of surgical infections.

Superficial Incisional SSI are those surgical site infections involving only the skin or subcutaneous tissue. Much lower risk of death.

According the Halyard: A surgical mask is a mask with ties to secure it to the face of the wearer. There is no OFFICIAL definition.

Situated toward the head and further away from the feet than another and especially another similar part of an upright body.

An infection that occurs within 30 days after the operation if no implant is left in place or within 1 year if implant is present and the infection appears to be related to the operation.

The large vein that returns blood to the heart from the head and arms. This is desired positioning for the distal tip of central venous catheters (CVC).

A classification system which employs descriptive case features to postoperatively grade the degree of intraoperative microbial contamination. Class I/Clean: An uninfected operative wound in which no inflammation is encountered and the respiratory, alimentary, genital, or uninfected urinary tract is not entered. In addition, clean wounds are primarily closed and, if necessary, drained, with closed drainage. Operative incisional wounds that follow nonpenetrating (blunt) trauma should be included in this category if they meet the criteria. Class II/Clean: Contaminated: an operative wound in which the respiratory, alimentary, genital, or urinary tracts are entered under controlled conditions and without unusual contamination. Specifically, operations involving the biliary tract, appendix, vagina, and oropharynx are included in this category, provided no evidence of infection or major break in technique is encountered. Class III/Contaminated: Open, fresh, accidental wounds. In addition, operations with major breaks in sterile technique (e.g., open cardiac massage) or gross spillage from the gastrointestinal tract, and incisions in which acute, nonpurulent inflammation is encountered are included in this category. Class IV/Dirty-Infected: Old traumatic wounds with retained devitalized tissue and those that involve existing clinical infection or perforated viscera. This definition suggests that the organisms causing postoperative infection were present in the operative field before the operation.