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AstraGuard Bacterial/Viral Filter for Pulmonary Function Testing (50/box)

Original price $109.95 - Original price $109.95
Original price $109.95
$103,626.00 - $103,626.00
Current price $103,626.00

The AstraGuard Bacterial/Viral Filter provides virtually perfect infection protection for expiratory and inspiratory spirometry testing. Its single-patient use greatly reduces costly and time-consuming disinfection procedures.

This easy-to-use disposable mouthpiece incorporates a highly efficient woven filter that virtually eliminates cross-contamination from patient to patient and from patient to health care professional.


  • 99.9% Bacterial and viral efficiency*
  • Low resistance to air flow
  • Small, non-threatening size
  • Comfortable oval mouthpiece
  • Reduces risk of cross-contamination
  • Less time spent disinfecting equipment

Cross-section of filter shows placement of interior media. Edge of media is bonded to exterior housing to form tight seal.


Interior filter media woven material is tailored to fit inside mouthpiece.

Manufacturer: SDI Diagnostics | MPN: 29-7990-050

How many in the pack? 50 eaches

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Ask a Question
  • Will the Astraguard Spirometer Filter from SDI Diagnostics Part MPN 29-7990-050 work with a Baseline Spirometer model #12-1710?

    If you’re talking about the Baseline spirometer, the answer is no. The 29-7990-050 are made for our Astra spirometers. I have personally contacted the manufacturer, and we are not aware of any other machines which use this particular diameter of mouthpiece.