The purpose of the regulation
DS 109 forms part of the insurance framework under Law 16.744. It addresses aspects of classification and evaluation of occupational accidents and diseases. It should be read alongside current instructions from the Social Security Superintendence, rather than as an isolated document dating from 1968.
Three questions need to be separated: clinical diagnosis, determination of occupational origin and evaluation of consequences or impairment. A conclusion on one does not automatically replace the work needed to address the others under the applicable procedure.
Earlier work also matters
Article 16 requires a relationship with work involving the relevant risk, even where that work is no longer performed when diagnosis occurs. Restricting investigation to the current job can therefore overlook important exposure from previous employment or earlier tasks.
A useful occupational history identifies periods, activities, agents and known protective measures. Preserve uncertainties and information sources: gaps should not be filled as though measurements existed, nor should earlier exposure be dismissed simply because an establishment has closed.
Diseases and classification procedures
Article 19 relates diseases to particular work activities and agents. Inclusion of a diagnosis does not authorise the employer to determine its origin independently; competent institutions must intervene according to the applicable procedures and evidence requirements.
SUSESO’s compendium addresses clinical assessment and evaluation of working conditions. It also explains that an individual occupational disease notification can come from several parties, including the worker, and that failure by the employer to notify does not prevent the person seeking assessment.
Connecting the case with prevention
Exposure information supplied by the employer should be complete, traceable and relevant. Other workers’ data or unnecessary clinical information should not circulate indiscriminately among those involved in administrative case management.
An example is reconstructing dusty tasks performed years before diagnosis while also examining the current job. Findings may inform controls for people who remain exposed. Individual classification and collective improvement are related but distinct processes; this article does not assign impairment percentages or determine entitlement to particular benefits for any individual worker.
