IH Respiratory Protection 04/13/2026

Summary of Medical Evaluations and Respiratory Protection

Overview of Medical Evaluations

• Initial Evaluation:
      - Required before an employee can use respirators.
• Subsequent Evaluations:
      - Not necessarily required annually.
      - Triggered if the employee’s health status changes (e.g., develops a condition affecting respirator use).
• Employer's Responsibility:
      - Must be informed by the employee if any new medical condition develops.
      - This includes situations like developing asthma that could affect the employee's ability to use a respirator.

Key Definitions

• PLHCP (Physician or Licensed Health Care Provider):
      - Must administer medical evaluations following the questionnaire found in Appendix C of OSHA standard 1910.134.

Employer Duties for Voluntary Respirator Use

• Determine that voluntary respirator use does not create a hazard.
• Provide information in accordance with Appendix D of OSHA standard 1910.134.
• Must have a mini respiratory protection program for employees using respirators voluntarily (excluding dust masks).

Assigned Protection Factor (APF) and Maximum Use Concentration (MUC)

• Calculation of MUC is based on APF and the permissible exposure limit (PEL).
      - Formula:
  $ext{MUC} = ext{APF} imes ext{PEL}$
      - Example: For H₂S, ceiling PEL is 20 ppm while APF for a half-face air-purifying respirator is 10, yielding a MUC of 200 ppm.
      - However, this is capped at an Inhalation Level guideline (IVLH) if the MUC exceeds it. In this case, IVLH is 100 ppm.

Re-evaluating Medical Conditions and Fit Testing

• Fit Testing Requirements:
      - Required before the initial use of any tight-fitting respirator.
      - Must be re-evaluated under the following conditions:
          - Change in the type (make/model/size) of the respirator.
          - Change in the employee's physical condition.
      - Types of fit testing include both qualitative (e.g., bitter/sweet taste tests) and quantitative methods.
• Common Mistakes:
      - Confusing medical evaluation and fit testing requirements for voluntary use of dust masks versus elastomeric respirators.

Respiratory Protection Program Requirements

• Employers must develop a site-specific respiratory protection program when respirators are required.
• Key components include:
      - Selection Procedures: For what respirators employees will use based on hazards assessed.
      - Medical Evaluations Procedures: For how and when evaluations will occur.
      - Fit Testing Procedures: Procedures for how and when fit tests will occur.
      - Training: How and when training will occur.
      - Program Evaluation: Must ensure ongoing effectiveness and compliance with OSHA.

Training and Evaluation of Respirator Programs

• Initial and Annual Training: Required for employees using respirators.
• Evaluation and Update Frequency: Not specified but should occur when workplace conditions change significantly.
• Record Keeping:
      - Medical evaluation records retained for 30 years post-employment.
      - Fit testing records kept until the next fit test.
      - The written respiratory protection program must be maintained current and accessible for review by OSHA.

Important Considerations in Respirator Use

• Facial Hair and Fit Testing:
      - Any facial hair that affects the seal of a respirator disqualifies use.
• Protective Measures: Those requiring medical evaluations must understand the implications for their health and notify employers when conditions arise.
• Emergency Egress Respirators: Special protocols apply when utilizing respirators in conditions classified as Immediately Dangerous to Life or Health (IDLH).

Conclusion

• Employers and employees must stay vigilant about respiratory protection to ensure safety in environments with airborne hazards.
• Proper education, evaluations, and adherence to standards are essential for minimizing health risks associated with respirator use.