AP_20097651647823-1600x900-1Even as hospitals and governors raise the alarm about a shortage of ventilators, some critical care physicians are questioning the widespread use of the breathing machines for Covid-19 patients, saying that large numbers of patients could instead be treated with less intensive respiratory support.

If the iconoclasts are right, putting coronavirus patients on ventilators could be of little benefit to many and even harmful to some.

What’s driving this reassessment is a baffling observation about COVID-19: Many patients have blood oxygen levels so low they should be dead. But they’re not gasping for air, their hearts aren’t racing, and their brains show no signs of blinking off from lack of oxygen…..more