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ELI-PGY5 t1_iu5i898 wrote

Reply to comment by Existing_Thought5767 in Does the cerebral spinal fluid of people with Alzheimer's have a notably different pH from 'normal' people's? by wrhollin

That’s gibberish. pH of blood changes in specific disease states. Checking blood pH is a common, useful pathology test.

As for 0.2 = “cells destroyed very quickly” “body would literally not function” - you’re exaggerating. A drop of 0.2 (7.4 to 7.2) would not even count as a severe acidosis.

So I rate your comment 3.2% the right answer, not 100%.

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Daguvry t1_iu5zvmw wrote

Run blood gases all the time working in Respiratory. That's how we monitor correct vent settings and most COPD patients on BIPAP. I can swing blood pH by more than .2 in less than hour with tidal volumes and respiratory rates.

Out of control diabetics can get really low pH values but that's a metabolic issue, not a respiratory issue. I've seen plenty of diabetics under 7.0 pH where the normal pH values are 7.35-7.45

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ELI-PGY5 t1_iu7lm1h wrote

Yeah, I was think of a guy I saw recently with DKA, pH 6.9, not crisp but his cells were also not all dead.

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gasdocscott t1_iu8ox4x wrote

I've treated patients with pH less than 6.7 (or lower- the gas machine doesn't go lower). Often DKA, which is remarkably responsive to treatment even at those extremes.

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