How Did Bains Circuit, Which is Unsuitable for Spontaneous Ventilation in Anaesthesia— Worked Miraculously for Spontaneous Ventilations During Covid

According to textbooks - Bain circuit is contraindicated for spontaneous ventilation. With Bain circuit, valve half closed — patients pCo2 increases to 60. At 60 pCo2 - Respiratory Center gets stimulated and patients start breathing normally. High pCo2 Of 60 shrinks the turbinates and increases the volume of the airways as a natural protective phenomenon  This is the reason for good improvement, after bain circuit is used pCo2  should be monitored and maintained at 60.

At higher pCo2 above 70-80  Carbon dioxide Narcosis set in and respiratory drive comes down. This is the key factor working in COVID-19 scenarios.CO2 is that this gas has many important functions in your body. For example: A study at the Karolinska Institute in Sweden showed that the growth of staphylococci was 1,000 times higher when the bacteria were exposed to normal air for 24 hours, compared with exposure to air…