Nationales Referenzzentrum
für Surveillance
von nosokomialen Infektionen


Module Summary


Surveillance goal: Infection surveillance

Surveillance principle: Patient/ward based

Patient group: Ambulant patients undergoing certain surgical procedures


AMBU-KISS consists of surgical site infection surveillance in outpatient care practices and clinics. Participating centers select indicator operative procedures for surveillance in their ward. Patients are kept under surveillance for up to 30 days post-procedure through (for example) follow-up examinations by the surgeon.

AMBU-KISS (surgical site infection surveillance following selected outpatient operative procedures)

Surgical site infections (SSI) following selected outpatient operative procedures have been tracked in AMBU-KISS since 2002. The Department of Environmental Health Sciences (Institut für Umweltmedizin und Krankenhaushygiene) of the Universitätsklinikum Freiburg serves as the project headquarters. AMBU-KISS provides reference data for outpatient surgical facilities.

In cooperation with diverse professional organizations, various indicator operative procedures were selected for AMBU-KISS that are frequently performed in outpatient surgery centers. At present, 11 procedures are tracked as indicators. These are defined by their OPS-301 procedure codes. Surgical facilities participating in AMBU-KISS select one or more indicator operative procedures and track every patient undergoing one of these procedures for 30 days afterward. This can take place through follow-up examinations by the performing surgeon, for example.

An SSI rate is calculated by the project center for every indicator operative procedure from the total number of SSI and the number of operative procedures performed. Data comparison is only possible when all patients undergoing a selected operative procedure are included in surveillance. Surveillance may not be limited to specific OPS-301 procedure codes within an indicator operative procedure. Data comparison is further ensured by the strict usage of CDC definitions for SSI diagnosis.

In OP-KISS, a surveillance module for SSI in hospitals, infection data are stratified by risk factors during evaluation. Because risky patients are underrepresented in outpatient surgical centers, AMBU-KISS does not record patient risk factors. Reference data consist of pooled AMBU-KISS participant infection rates and the results of risk group 0 in OP-KISS, if the indicator operative procedures tracked in AMBU-KISS are also tracked in OP-KISS.

Registration for AMBU-KISS takes place through the project center in Freiburg.


Blaich A, Babikir R, Daschner F, Schweins M, Lambert J, Ingenhoven E, Gastmeier P, Dettenkofer M. Qualitätssicherung und Hygiene beim ambulanten Operieren. Ergebnisse einer Umfrage im Rahmen von AMBU-KISS. Der Chirurg 2007; 78(7): 630-636. (German)