Hypoglycaemia Flashcards
What are causes of hypoglycaemia in a diabetic patient?
Insulin or sulphonylurea use plus other factors:
- Exercise
- Missed meal
- Overdose
What are causes of hypoglycaemia in non-diabetic patients?
- Exogenous drugs
- Pituitary insufficiency
- Liver failure
- Addison’s disease
- Islet cell tumours
- Non-pancreatic neoplasms
What are examples of exogenous drugs which can cause hypoglycaemia?
- Insulin
- Alcohol use
- Aspirin poisoning
- ACE-i
- B-blockers
- IGF-1
- Pentamidine
What are the main symptom/sign groupings of hypoglycaemia?
- Autonomic syptoms/signs
- Neuroglycopenic symptoms/signs
What are the autonomic features of hypoglycaemia?
- Sweating
- Anxiety
- Hunger
- Tremor
- Palpitations
- Dizziness
What a neuroglycopenic features of hypoglycaemia?
- Confusion/Irritability
- Drowsiness
- Visual trouble
- Seizures
- Coma
- Focal features - rare
What is the definition of hypoglycaemia?
BG of <3 mmol/L
What investigation would you do in someone with suspected hypoglycaemia?
Blood glucose - most important test
- Cap glucose
- Lab glucose
Consider tests for suspected cause
- LFTs
- Addison’s test
- Insulin levels
- C-peptide
- Proinsulin
When interpreting results, what could cause hypoglycaemic hyperinsulinaemia?
- Insulinoma
- Sulphonylurea
- Insulin injection
- Mutation of insulin receptor gene
How could you tell if someone with hypoglycaemia had taken injectable insulin overdose based on blood results?
No c-peptide present in the blood, but hyperinsulinaemia
If someone had low insulin and high ketones and had hypoglycaemia, what could be the cause?
- Alcohol
- Pituitary insufficiency
- Addison’s Disease
What is classed as mild hypoglycaemia?
- Patient conscious
- Able to swallow
- Orientated
How would you manage mild hypoglycaemia?
15-20g quick acting carbohydrates
5-7 dextrose tablets/4-5 glucotabs
OR
170-220 mls original lucozade
OR
150-200 mls pure fruit juice
What is classed as moderate hypoglycaemia?
- Patient conscious
- Able to swallow
- Confused/Disorientated/Aggressive
When would you consider giving further treatment for mild hypoglycaemia?
If BG is <4 mmol/L after 15 minutes of giving 15-20g quick acting carbohydrates, repeat initial management up to 3 times
If after treating someone repeatedly for mild hypoglycaemia with oral carbohydrate solutions, what would you consider?
IV 10% glucose - 100 ml/hr
OR
1 mg Glucagon IM
How would you manage moderate hypoglycaemia?
If capable/cooperative - same as mild hypoglycaemia treatment
If not capable/cooperative
- 1.5-2 tubes glucogel
If ineffective - 1mg Glucagon IM
If, after giving repeated treatments with glucogel (or 1 mg glucagon) for moderate hypoglycaemia, what would you consider giving?
IV 10% glucose at 100 ml/hr
What is classed as severe hypoglycaemia?
- Unconscious/Fitting
- Aggressive
- Nil by mouth
How would you manage someone with severe hypoglycaemia?
- Check ABC
- Stop IV insulin
- Give 75 ml IV 20% glucose OR 1mg Glucagon IM
How soon after giving treatment for severe hypoglycaemia would you recheck someones blood glucose?
10 minutes
What would you give someone who’s blood sugar (after treating them initially) was above 4 mmol/L?
20g long acting carbs
- Two biscuits
- Slice of bread
- 200-300 ml milk
If IM glucagon used - use 40 g long acting carbs
If someone was nil by mouth after getting their blood glucose above 4 mmol/L, how would you manage them?
IV 10% glucose - 100 ml/hr
When should a patient advise the DVLA of their condition?
If treated by diet only - dont need to tell DVLA
Need to tell DVLA if:
- More than one episode of severe hypoglycaemia within the last 12 months.
- High risk of developing severe hypoglycaemia.
- Loss of hypoglycaemic awareness
- Suffer severe hypoglycaemia while driving.
- Need treatment with insulin.
- Need laser treatment to both eyes or in the remaining eye if you have sight in one eye only.
- Problems with vision in both eyes, or in the remaining eye if you have sight in one eye only.
