Carbon Dioxide Concerns

The RS1 Respirator Mask minimal dead space and filter airflow quickly removes carbon dioxide from the mask with each exhaled breath taken. Example: Try blowing through an N95 mask or surgical mask, you cannot blow out a burning flame. A substantial amount of carbon dioxide stays which is then inhaled. Try blowing through an RS1 mask, you can easily blow out a burning flame. The filter does not resist carbon dioxide airflow it only captures bacteria and virus particles using an electrostatic process!
Evaluation of re-breathe air in human nasal cavity with N95 respirator:
"A CFD study (Computational Fluid Dynamics)"
CFD simulations to investigate how the respired air is dissipated during respiration while wearing/not wearing N95 respirator.
The N95 respirator trapped respired air within the respirator which increased the VOF of respired air during inspiration. This might be one of the major contributors to elevated carbon dioxide level while wearing N95 respirator.
Wearing an N95 respirator was reported to cause headaches among healthcare providers. N95 respirator and surgical face mask also causes different heart rate and subjective perception of discomfort.
N95 respirator elevated the carbon dioxide level while decreasing oxygen level within the respirator which may be the cause of subjective complaints for wearing respirators. The increased partial carbon dioxide level also tends to affects breathing patterns and heart rate variability. One possibility is that the expired airflow, with higher concentration of carbon dioxide, is trapped around the masks and re-enter the respiratory system during the next respiration cycle.
60% of respired air reentered the nasal cavity during the consecutive respiration cycle. This study also proves that CFD (Computational Fluid Dynamics) is a useful tool to provide reasonable explanation for experimental findings.
Walking slowly during rounds, N95 mask use noticeably increases inhaled carbon dioxide, reduces inspired oxygen, and increases the work of breathing. The resulting inhaled carbon dioxide of 2 to 3% (normal, 0.04%) produces transient acidosis and compensatory increases in minute ventilation, work of breathing, and cardiac output. Symptoms include sweating, visual changes, headache, dyspnea, increased irritability, and decreased reasoning, alertness, and exercise endurance. Independently, the inspired oxygen of 17% (normal, 21%), yields headache, light headed, drowsiness, muscular weakness, dyspnea on exertion, nausea, and vomiting. Simultaneously, the augmented resistance to inspiratory (15% of maximum) and expiratory flow, when experienced for greater than 10 min, results in respiratory alkalosis, increased lactate levels, fatigue, and impaired physical work capacity.
N95 masks are estimated to reduce oxygen intake by anywhere from 5 to 20 percent. That’s significant, even for a healthy person. It can cause dizziness and light headed. If you wear a mask long enough, it can damage the lungs. For a patient in respiratory distress, it can even be life threatening.