• Contact Us

    Texas Center for Infectious Disease
    2303 SE Military Drive
    San Antonio, Texas 78223

    Phone: 210-534-8857
    TB Consultations: 800-839-5864

    TCID Contacts

Respiratory Protection FAQs

The Texas Center for Infectious Disease (TCID) protects the health of their employees who may come in contact with harmful air contaminants through the administration of a respiratory protection program. Here you can find answers to frequently asked questions about the respiratory protection program at TCID. 

How does TCID evaluate an employee’s ability to use a respirator?

What masks do employees wear?

How is mask-fit testing conducted?

How are masks cleaned?

Additional Resources


How does TCID evaluate an employee’s ability to use a respirator?

TCID performs a medical evaluation using a medical questionnaire.
View the questionnaire (DOC)

What masks do employees wear?

The masks that are worn at TCID are North 7700 half-mask elastomeric respirators with P-100 filters.
View the North 7700 Respirator Manual (PDF 184kb)

How is mask-fit testing conducted?

TCID conducts negative pressure, positive pressure and qualitative fit testing as shown below.

Respiratory Therapist conducts mask fit testing with a negative pressure test

Negative Pressure Test

Respiratory Therapist conducts mask fit testing with a negative pressure test

Positive Pressure Test

Respiratory Therapist conducts a qualitative fit test for a mask

Qualitative Fit Test

With qualitative fit testing, a smoke irritant (Stannic Chloride smoke tubes) is used to detect a leak in the respirator. Once the mask is secured properly, the employee conducts a series of 1-minute breathing exercises including:

  • Normal breathing
  • Taking deep breaths in
  • Moving their head up and down
  • Moving their side to side
  • Counting out loud

Inhalation of the relatively low concentration smoke irritant will cause irritation to the upper respiratory tract and eyes and will produce a cough, which detects that there is a leak present.

How are masks cleaned?

TCID cleans their elastomeric respirators thoroughly with a 70% alcohol-based wipe and follows OSHA guidelines for cleaning.

For contact isolation patients, TCID uses an Aqueous Iodine Solution Mixture of 1 Liter of Sterile Water and 0.8 Milliliters of Tincture Iodine.

View our manufacturer’s guidelines 

View OSHA cleaning procedures

Additional Resources

Last updated July 22, 2020