This morning, Roscoe had his 3rd CO2 measurement since he's been back on more breathing support with the bubble CPAP. His first two measurements (64 and 68) were taken from the small capillary veins in his foot, so they can tend to be higher than the actual value. This morning's measurement was taken from his arteries, so it is more accurate. We were hoping for a lower value. I specifically prayed for "58", but the measurement came back at 77. This is one of the higher readings he's had (higher is worse).
The pulmonologist gave us the chart below when we had a meeting about a week and a half ago. The chart shows his CO2 readings over time, correlated to changes in his breathing support.
At this point we had hoped to see a downward trend starting, since he's receiving additional breathing support. The amount of oxygen being pushed into his lungs has been increased from 100mL/minute to 2100mL/minute (6L/min at 35% oxygen). What is extremely frustrating to Alisha and I is that he is on greatly elevated breathing support now, but his readings are indistinguishable from those in late March when he was on minimal nasal cannula preparing to come home. On Saturday the doctor on call said that if his numbers stay in the mid-60's then they are comfortable with that. I'm not sure if they'll react to this single reading of 77 and elevate his breathing support once again, or if they'll give him time to get another reading.