Note: I am NOT medically trained, always seek professional advice etc. etc.
Hypoglycaemia (low blood glucose) is a consequence of the treatment
for diabetes and not of diabetes itself.
Anyone treated with insulin or sulphonylurea tablets is at risk from
hypoglycaemia, regardless of whether they have Type 1 or Type 2 (or
any other kind) of diabetes.
People with Type 1 diabetes have no insulin of their own and rely on
injected insulin to stay healthy; people with Type 2 diabetes may be
on insulin depending on how long they have had the condition
(they may use other tablets that do not cause hypos, or may not need
to take any medication for their condition).
Most hypos are heralded by early warning symptoms which alert the
person that their blood glucose levels are dropping. This can
usually be remedied by them taking something sugary - glucose tablets
are ideal.
Some people do not have these warning symptoms, or if they are
unable to take something sugary then the glucose levels will fall
further and the person may become unconscious.
Glucogel (the new name for Hypostop) is an edible gel that can be
taken by a conscious patient:
http://www.glucogel.co.uk/information.asp?INFOID=2
Glucogel should not be given to people who are unconscious because
of the risk of choking.
If the person is unconscious, and they have GlucaGen (glucagon) in
their kit then this can be given as an injection into the muscles.
This link takes you to the patient information leaflet for GlucaGen
(the leaflet would usually be within the packaging) and it contains
advice on how to prepare the glucagon hormone for injection.
http://emc.medicines.org.uk/emc/assets/c/html/displaydoc.asp?documentid=4257
You'd really only do this if you knew what you were doing though.
Hyperglycaemia is a direct consequence of diabetes; raised blood
glucose levels can cause long term damage and complications.
It becomes a
critical problem only in the absence of any insulin
when glucose levels become high and the body turns to its reserves
of fat and muscle for fuel. This can seriously muck up the body's
biochemistry leading to 'diabetic ketoacidosis' (DKA). This is a
medical emergency and needs urgent treatment in hospital or similar.
DKA is very preventable - as long as insulin is available, and
typically would take a day or so to become very serious - but it
is very serious when it happens.
Hypos are technically preventable, but can sneak up unawares and
can happen in a very short space of time -
usually they are less
serious and only rarely have a problematic recovery.
The rate at which insulin is absorbed into the bloodstream from the
injection site also varies with temperature. Also the machinery used
to measure blood glucose levels appears to be vaguely altitude-
sensitive so in some situations it can be a bit tricky.
I think that's about right, but I bet I'll suddenly think of something and
pop back and edit it
Jo