Week 5 Flashcards
what is used as a screening test for DM
HbA1c
DM treatment
lifestyle = diet, exercise, weight loss
pharma = glucose lowering like insulin
acute diabetes related complications
diabetic emergencies, hypoglycemia, infections
chronic diabetes related complications
macrovascular = IHD, stroke, peripheral arterial disease
microvascular = retinopathy, nephropathy, neuropathy
during foot examinations for DM, what do u inspect for
foot ulcers
palpate pedal pulses
sensations
Hb1Ac indicates
glycated hemoglobin
pre-meal glucose target should be __
4.4 - 7.2 mmol/L
2H post meal glucose target should be __
<10.0 mmol/L
ABC targets
Hb1Ac < 7.0%
Blood pressure <140/80mmHg
LDL cholesterol <2.6mmol/L
how to manage macrovascular diabetes complications
blood pressure monitoring, lipid management, smoking cessation
how to manage microvascular diabetes complications
urine albumin / creatinine ratio
retinal photo
diabetes foot screening
diet for diabetics
lots of fruits & veg, low GI carbs, lean protein & fish, water
effects of exercise
stimulates glucose transport & metabolism
increases blood flow to muscles
exercise recommendations
> 150 mins per week of moderate activity
> 75 mins per week of vigorous activity
ideal characterisitcs of diabetes drug
efficacy, safe, cheap, no side effects + hypoglycemia, weight gain
what is insulin associated with
painful, weight gain, hypoglycemia, visual impairment
glucose toxicity leads to
beta cell dysfunction & insulin resistance
when to use early insulin therapy
diabetic emergencies, uncontrolled hyperglycemia, symptomatic hyperglycemia, catabolic features
diabetic emergencies
diabetic ketoacidosis, hyperglycemic hyperosmolar state
diagnostic criteria for diabetes ketoacidosis
glucose > 14mmol/L
urine ketones 3/4+
blood ketones > 1
HCO3 < 18mmol/L
pH<7.3
diagnostic criteria for hyperglycemic hyperosmolar state
glucose > 33.3 mmol/L
effective serum osmolarity > 320mOsm/kg
altered sensorium
Symptomatic hypoglycaemia
symptoms & CBG < 4 mmol/L
Asymptomatic hypoglycaemia
no symptoms & low CBG < 4 mmol/L
Severe hypoglycaemia
another person needed to administer treatment
relative hypoglycaemia
symptoms but CBG > 3.9 mmol/L
symptoms of autonomic hypoglycemia
- Palpitations
- Tremors
- Anxiety
- Sweating
- Hunger
PATHS
symptoms of neuroglycopenic hypoglycemia
- Cognitive impairments
- Behavioural changes
- Blurring of vision
- Seizure
- Coma
hypoglycemia consequences
IQ drop, sudden death due to QT interval abnormality & MI
if hypoglycemic patient alert, give them __
glucose drink (15 - 20g)
if hypoglycemic patient drowsy or vomitting, give them __
IV D50% bolus 40 mls
when to begin monitoring of hypoglycemic patient
capillary glucose 30 mins after correction & every 2-4 hourly thereafter
hyperthyroidism TSH & T4 levels
TSH low
T4 high
hypothyroidism TSH & T4 levels
TSH high
T4 low
hypothyroidism secondary TSH & T4 levels
TSH low
T4 low
primary hyperthyroidism causes
graves’ disease, toxic adenoma, toxic multinodular goitre, subacute thyroiditis, medicated induced thyrotoxicosis
fasting plasma glucose for diabetes according to MOH
> 7 mmol/L
2 hr plasma glucose after 75g according to MOH
> 11.1 mmol/L
random plasma glucose according to MOH
> 11.1 mmol/L
skin examination for DM includes
acanthosis nigricans & insulin injection sites
CGM glucose sensor measures __
interstitial glucose
medication factors influencing aherence
1) side effect & safety profile
2) costs
3) route & frequency of administration
fruity scented breath associated with
diabetic ketoacidosis
capillary glucose “HI” or > 33.3 mmol/L associated with
hyperglycemic hyperosmolar syndrome
diff between DKA & HHS in terms of patient profile
DKA = may occur in both but T1 prone to DKA
HHS = usually T2 and elderly
diff between DKA & HHS in terms of rate of development
DKA: fast - hours to days
HHS: days to weeks
diff between DKA & HHS in terms of degree of dehydration
DKA: ~100ml/kg
HHS: ~100 - 220ml/kg
diff between DKA & HHS in terms of mortality
DKA < 1%
HHS 5 - 20%
what hormones lead to hyperglycemia
decreased glucose utilization, increased gluconeogenesis & glycogenolysis
DM confirmed diagnosis is done via
- serum glucose
- arterial blood gas
- urine + blood ketones
DM investigation for precipitating factor
- blood + urine cultures
- ECG + cardiac enzymes
- CXR
- lipids, amylase
DM management includes
hydration, decrease serum glucose + blood + ketones, correct electrolyte imbalances, treat precipitating event
role of TSH & T4
TSH stimulates thyroid and T4 turns off TSH in pituitary gland
hyperthyroidism effects
- atrial fibrillation
- heart failure
- osteoporosis
- neuropsychiatric effects
- diarrhea & abdominal cramps
- menstrual irregularities
hypothyroidism effects
- atherosclerosis
- pericardial effusion
- cognitive impairment
- muscle cramps
- menstrual irregularities
thyroid eye disease indicates __
graves’ disease
pain & tender thyroid + preceding URTI / fever indicates __
subacute thyroiditis
enlarged thyroid nodule indicates __
toxic MNG/adenoma
graves’ ophthalmopathy includes __
- proptosis
- exophthalmos
- lid retraction & lag
- restricted extraocular muscle movement
thyroid examination includes __
enlargement, tenderness
if Graves’ disease suspected, use __
FT4, TSH & TSH receptor ab
if toxic nodule/MNG suspected, use __
FT4, TSH + thyroid US & uptake scan
graves’ disease treated using __
- thioamides: start high & taper down
- treat for 12-18 months KIV withdraw
thioamides act on
peroxidase
iodides act on
proteolysis
side effects of thioamides
rashes commonly but serious cases include
- agranulocytosis
- hepatotoxicity
- vasculitis
thyroid storm tests assesses for
CVS, gastrointestinal-hepatic, CNS, thermoregulation, history
patient stabilization includes
ABC = airway, breathing, circulation
what drug decreases thyroid hormone synthesis
thioamides
what drug prevents thyroid hormone release
Lugol’s iodine
what drug decreases peripheral actions of thyroid hormone
corticosteroids, beta-blockers
physical examination for thyroidism
weight, thyroidectomy scar, bradycardia, goitre, dry skin
primary hypothyroidism caused by
- hashimoto thyroiditis
- other thyroiditis
- drugs
- post RAI / thyroidectomy
if hashimoto thyroiditis suspected, use __
FT4, TSH, thyroid peroxidase antibody
__ empirically cover for adrenal insufficiency
IV glucocorticoids
thyroid storm
life threatening endocrine emergency by exaggerated symptoms of hyperthyroidism & evidence of multiorgan decompensation
ABCs of patient stabilization
airway, breathing, circulation
hashimoto’s thyroiditis treatment involves __
thyroxine which is titrated to keep TSH normal
myxedema coma
decompensated hypothyroidism
tested criteria for myxedema coma
thermoregulation dysfunction, CNS effects, GI findings, precipitating events, CVS dysfunction, metabolic disturbances
thyroid specific therapy for myxedema coma involves the use of __
IV glucocorticoids for adrenal insufficiency
IV levothyroxine; switch to oral when patient more alert
empirical cover for hypocortisolism includes
IV hydrocortisone
IV levothyroxine loading dose of ___ to saturate receptors followed by maintenance
200 - 400 mcg
primary hypothyroidism treatment is ___
levothyroxine replacement therapy
when is levothyroxine replacement therapy taken
1 hr before meal / 4 hrs after last meal
things that interfere with levothyroxine absorption
diet (meals, Ca2+, grapefruit juice)
bile acid sequestrants (cholestyramine)
oral bisphosphonates, ferrous sulphate, calcium carbonate/citrate/acetate
thyroid storm treatments include
decrease thyroid hormone synthesis using thioamides
prevent thyroid hormone release using Lugol’s iodine
decrease peripheral action of thyroid hormone using corticosteroids & beta-blockers
thioamide solution for thyroid storm includes
propylthiouracil 400 mg stat then 200 mg Q6H
propylthiouracil inhibits __
T4 to T3 conversion in thyroid & peripheral tissues
wolff chaikoff effect
autoregulatory phenomenon where large amount of ingested iodine inhibits thyroid hormone synthesis
Lugol’s idoine is administered __
1H after 1st dose of PTU to prevent iodine from being a substrate for synthesis
corticosteroids work by __
inhibiting peripheral conversion of T4 to T3
definitive therapy includes __
thyroidectomy & radioiodine
major toxicities of anti-thyroid drugs
agranulocytosis, liver toxicities, ANCA positive vasculitis
metabolic syndrome diagnosis criteria
- waist circumference
- plasma triglycerides
- plasma HDL cholesterol
- BP
- FPG
key features of metabolic syndrome
significant abdominal fat, changes in glucose & lipoprotein metabolism
treating hypoglycemia using __
15g of fast acting carbs and recheck glucose levels 15 mins after ingestion