Infection percentage

Description

Antibiotic prophylaxis

Clean

(I)

1.5% - 4.2%

Usually non traumatic. It presume that respiratory, genitourinary and digestive tract are not opened and the lack of technical mistakes.

Not necessary, except for the presence of risk factors and comorbidities.

Clean-contaminated

(II)

<10%

Surgical procedures in which there is the opening of respiratory, genitourinary and digestive tract in the absence of an evident contamination, or the opening of the oropharynx, genitor-urinary tract or biliary tract, unless clearly infected. It is also included in this category also any minor technical mistake.

Recommended.

Contaminated

(III)

10% - 20%

Procedures following a frank contamination of gastrointestinal tract or after the opening of genitor-urinary or biliary tract with the presence of urine or infected bile. It is also included in this category also any major technical mistake.

Necessary (wide spectrum).

Dirty

(IV)

20% - 40%

Procedures with a frank contamination, clinical infection in course, visceral perforation, purulent collections.

The usage of antibiotics is necessary for healing a pre-existing infections.