I was actually thinking the opposite of that (from same Wiki), HypOcapnia-SWS wrote:I'm certainly no medical pro or guru, but it sounds like SAG is wondering about the possibility of hypercapnia. One of the symptoms associated with hypercapnia is headaches.
Along that same line of thought Snoredog has been wondering about hypoventilation at night because of what just may be low apparent volumes. Sleep related hypoventilation is one possible cause of hypercapnia.
You must have read my answer in that other post on Anxiety and CPAP (they are related in my opinion):
Snoredog wrote:My guess: Hypocapnia
from a Wiki that explains it well:Link to the above Wiki where I stole the above explainification:Hypocapnia or hypocapnea also known as hypocarbia, sometimes incorrectly called acapnia, is a state of reduced carbon dioxide in the blood. Hypocapnia usually results from deep or rapid breathing, known as hyperventilation.
Hypocapnia is the opposite of hypercapnia.
Even when severe, hypocapnia is normally well tolerated. However, hypocapnia causes cerebral vasoconstriction, leading to cerebral hypoxia and this can cause transient dizziness, visual disturbances, and anxiety. A low partial pressure of carbon dioxide in the blood also causes alkalosis (because CO2 is acidic in solution), leading to lowered plasma calcium ions and nerve and muscle excitability. This explains the other common symptoms of hyperventilation —pins and needles, muscle cramps and tetany in the extremities, especially hands and feet.
Hypocapnia is sometimes induced in the treatment of the medical emergencies, such as intracranial hypertension and hyperkalaemia.
Because the brain stem regulates breathing by monitoring the level of blood CO2, hypocapnia can suppress breathing to the point of blackout from cerebral hypoxia. Self-induced hypocapnia through hyperventilation is the basis for the deadly schoolyard fainting game. Deliberate hyperventilation has been unwisely used by underwater breath-hold divers to extend dive time but at the risk of shallow water blackout, which is a significant cause of drowning.
http://en.wikipedia.org/wiki/Hypocapnia
Find yourself breathing rapidly? Probably why you have anxiety. I think more education on breathing is needed, there is a fine line between hypocapnia and hypercapnia. I find it ironic all our masks have vent rates that work for every patient. Or do they? If you already have anxiety and use like a Swift mask that really vacuums out your CO2, you are only making your condition worse.
My 90 year old mother has always controlled her anxiety and panic disorder by rebreathing in a brown paper lunch bag for a few minutes, worked like a charm. Why does that work? Because she is rebreathing her own exhaled CO2 which builds levels back up in her blood more towards the center.
I read one medical paper that suggested the Resperate (http://www.resperate.com) device made for biofeedback and controlling your blood pressure also works for controlling anxiety (although it is NOT FDA approved for that purpose). But this device works by retraining your breathing mainly slowing it down, the result is up to 30 point reduction in hypertension. I could find a lot more uses for that device. Have central apnea? don't let anyone convince you it is some neurological disorder cause it isn't. I'd research more on how to control it, controlling your breathing is one way. If you look at these machines designed to eliminate central apnea, that is all they do control your breathing, the condition that allows those centrals to exist go away. Now why hasn't Chest and these other journals come out and said that? It would be like finding the cause to heart attacks, can you imagine what that would do to the revenue stream for cardiovascular disease, they'd have to go find another disorder.
This is my long running theory, centrals are not bad they are the bodies only response when fighting against a mechanical device. You notice she didn't have any centrals on her split night diagnostic study.
Control her breathing with the SV side
Setup a "fixed" BPM mode in case something goes wrong
Its in her report bad machine or not, she is breathing too rapidly and too shallow, that is seen by peak volumes avg. 24ml and tidal volume in the 370's. She should be at least 500ml on exhale. Double your RR and you exhaust out twice as much CO2 at a faster rate. Go back to your I:E ratio, I think you were dead nuts right on.
Hypocapnia is caused either by DEEP breathing, or by Hyperventilation. Anxiety.... has your doctor ever asked you how fast you are breathing during the day? Make it a habit during the day and you will breathe like that during the night. Bev do you have hypertension? poor girl we have given her more than 50 dents already, what a trooper
Oh, I should add to the above why she gets headaches, it is from the vasoconstriction. The brain controls blood flow to itself either by dilating or constricting blood vessel diameter (see link below for picture) to increase blood flow during hypoxia like from apnea it dilates those blood vessels, this increases flow, more blood that gets to the brain more oxygen. Breath very deep for long periods it swings to the opposite side, the brain constricts cerebral vessels. It uses CO2 levels in the blood to regulate breathing. If that level gets too low it stops you from breathing by removing the respiratory drive and the result is a central apnea. As levels of CO2 build back up in your blood you start spontaneous breathing again.
http://www.sfn.org/index.cfm?pagename=b ... dSerotonin
You can see the constricted blood vessel on the left in the above cartoon, on the right the dilated vessel (much larger), attached to these blood vessels is the trigeminal nerve, at the end of that nerve is the serotonin receptors. "Nerves" don't like to be stretched and/or manipulated by a blood vessel changing shape, the result is the migraine pain you feel.
Sound familiar there SWS? Those same nerves are troublesome aren't they? I still got that drill ready man, I'll even watch that video again
