G31 Check-ups for Work in High Pressure

Testing Ability to Work in High-Pressure Environments

When working in compressed air environments or under water, the body absorbs large amounts of nitrogen. Gas emboli are the most common causes of accidents and can also have long-term side-effects. Our experienced occupational physician can first conduct initial examinations and follow-up checks and provide detailed advice on all of the health risks involved. So you know if your employees are physically able to work in a high-pressure environment.

Benefits at a Glance

With G31 studies for compressed air workers and divers by TÜV Rheinland, you:

  • Prevent causing or aggravating ill health among your employees due to their activities
  • Reduce downtimes caused by accidents
  • Fulfill all legal requirements for activities involving respirators and reduce risk of liability
  • Gain legal peace of mind vis-à-vis occupational safety authorities and professional associations
  • Benefit from the high level of training of our personnel
  • Save time and money through our research facilities in several locations, efficient management, and short-term appointments


Our occupational physicians are specifically qualified to examine persons working in environments with high pressure. After we arrange an appointment by telephone, we conduct the G31 examination of your employees in an occupational health center in your area. We can then issue them with an occupational certificate of health.


The initial examination must be made prior to commencement of an activity in a pressure environment. Follow-up examinations are required after 12 months.

Early Follow-Up

Early follow-up examinations are required the following cases:

  • If indications give rise to health concerns
  • At the request of the employee, if they suspect a causal link between their illness and their work tasks
  • If an investigation comes up with findings that require a follow-up check in a timeframe of less than 12 months
  • Following compressed air illnesses, illness of more than 6 weeks, or after several cases of illness in the space of six months. The authorized doctor decides whether the nature of the disease allows a return to work in high pressure, or whether early follow-up is required.

The Legal Principles

Are your employees exposed to pressure at their workplace that exceeds atmospheric pressure levels? Then annual occupational screening is mandatory for them - regardless of whether they only work occasionally or almost constantly in a high-pressure environment.

  • Divers working underwater who are supplied with fresh air through a self-contained breathing apparatus, and
  • Compressed air workers who work in environments with pressures greater than 10 kPa or 0.1 bar

can only be deployed for these types of activities if the occupational health screenings confirm their suitability for the job.

Detailed information is available in trade association principles and occupational health guidelines (for example, BG G 31 Überdruck and the UVV Arbeitsmedizinische Vorsorge GUV-V A4).