hanadr said:
You've confused yourself and possibly also other people. Low blood sugars do not cause diabetic coma. they cause hypoglycaemic incidents,(hypos) which are easily corrected and may even be self correcting.
I don't think I am confused here! You are quite right that low blood sugars cause a "hypoglycaemic incident", which is when the nervous system has insufficient glucose to function normally. This can cause a wide range of symptoms that are classified as either autonomic (involving the autonomic nervous system) or neuroglycopaenic (involving the brain). The autonomic symptoms of a hypo are the sweating, anxiety, pins and needles, shakiness etc. These tend to come first, and if the hypo is corrected then it won't go any further than that. The neuroglycopaenic symptoms include a "drunken" type of behaviour (difficulty in speaking, drowsiness, dizziness etc.). I have an endocrinology textbook open in front of me and it has a long list of symptoms of neuroglycopaenic hypoglycaemia that ends with
"fits, coma and death".
hanadr said:
I read somewhere that a hypo may well trigger glucose from the liver and correct itself.
Low blood sugar does cause glycogen stored in the liver to be released as glucose, but that is a slow process (it is the starvation response and it takes a few hours to kick in). This is usually going to be much too slow to correct anything but the mildest hypo. You correct a hypo by eating, and the best way to do it is to eat easily absorbable glucose (tablets or lucozade).
hanadr said:
A true coma comes with high blood sugar and is much more scarey.
Again this is partly true. Hyperglycaemia can cause a coma for different reasons to hypoglycaemia. A hyperglycaemic coma is caused by extreme dehydration - it is an extension of the classic thirst of undiagnosed diabetes (which is caused by a mild to moderate hyperglycaemia). A very severe hyperglycaemia can cause dehydration so substantial that it results in coma. This only occurs at blood glucose levels around 100mmol/l (and yes I do mean one hundred!), and as such it is extremely rare. It generally only occurs when a long-term undiagnosed diabetic is on a binge! It is rather more often seen as a consequence of "steroid diabetes" which is a temporary condition that can be caused as a side-effect of treatment with very high doses of steroids (usually in transplant or cancer patients - and invariably in a hospital).
hanadr said:
I've dealt with many hypos successfully in my type 1 husband. All is over in minutes or maybe an hour
The point that I was making is that a hypo is harmless
so long as it is corrected quickly. This correction is generally by means of a glucose tablet, or a gulp of lucozade. However some people empty the fridge - whatever works for you! At the start of this thread someone reported being told that it was wrong to do this, and that could be very dangerous advice. If you starve someone who has a hypo then there is every possibility that they will end up in a coma or worse. If they don't it will be because they got lucky and the livers starvation response was fast enough to do the job.
hanadr said:
but the one true coma led to 8 days in intensive care with every machine you've everr seen on TV bleeping and him gasping for breath. It was causeed by a doctor who decided he was hypo( before BG machines were routine) and gave IV glucose.Then he ran off leaving me and the ambulance paramedics to keep him alive.
OK, that is a cause of a hyperglycaemic coma I hadn't thought of :shock: Make that three: 1) an undiagnosed diabetic on a binge; 2) high dose steroid treatment; 3) an idiot doctor with a glucose drip.
sofaraway said:
i think the issue is how you define coma.
The Merriam-Webster medical dictionary defines a coma as
"a state of profound unconsciousness caused by disease, injury, or poison". Using this definition, both hypoglycaemia and hyperglycaemia can cause a coma, and both are equally scary conditions. They both require extremely rapid hospital treatment with a glucose drip for a hypoglycaemic coma or an insulin drip for a hyperglycaemic coma.
sofaraway said:
I think what diabeticgeek was saying was that highs are bad for you long term and lows are bad short term
More or less. If BG goes too low then that will cause almost immediate problems. This is the classic hypo that is easily remedied, but if it isn't remedied then it can be very dangerous. If BG goes too high then that
usually causes no immediate symptoms, but in the long term this is responsible for most of the side effects of diabetes. If BG goes extremely high, then it can cause the dangerous situation that Hana described - but it really does have to be
extremely high.