Mucus Plug Complication

So I called this morning to check on Mike. They had to raise his oxygen to 90% again but saturation was good. Two hours later, he was on 100% oxygen and had 84 saturation.

Apparently, he started coughing. He has a serious mucus plug in his lungs. They gave him saline to break up the plug if they can. If it continues, they will do a fiber optic exploration and suck out any mucus as they go.

I talked to my friend who is experienced in this, and she said this is common. She also said this is a good sign even though things sound bad.

I cannot help but be terrified. It seems he is slipping away again. Friggin mucus is evil....