endo Flashcards
Pioglitazone side effects
Weight gain Fractures Fluid retention (C.I HF) bladder cancer Liver impairment
Ix Cushings syndrome
24h urinary cortisol
Overnight dexamethasone suppression test
Pitadenoma-high dose -> reduced.cortisol,highACTH
ACTH low, cortisolnoteffected ->adrenal adenoma, (cushings syndrome)
high acth, unaffected cortisol -> ectopic acth
Raised prolactin effect
Impotence, libido loss, galactorrhea
women : amenorrhea, galactorrhea
Causes of raised prolactin
Prolactinoma pregnancy oestrogens stress, exercise, sleep acromegaly PCOS Hypothyroid Metoclopramide, domperidone phenothiazines haloperidol SSRIs, opioids
drug cause of hypercalcaemia
thiazide
Levothyroxine in pregnancy
increase dose by 50% at 4-6w
increase in TBG
measure TSH in each trimester.
breastfeeding safe.
dx HHS
hypovolaemia
glucose>30
serum osmolality >320
Mx HHS
Fluid replace0.9% saline
positive balance of 3-6 L by 12h
monitor serum osmolarity, glucose, sodium .
Addisons causes
sepsis
surgery -> exacerbations
adrenal haemorhage
steroid withdrawal
Mx addisons
100mg Hydrocortisone IM /IV
1 litre saline + dextrose 30-60m
continue steroids 6hly until stable
continue maintainence after 24h
tx prolactinoma
bromocriptine
pituitary adenoma ix
bloods - GH, prolatin, ACTH, FSH, LH, TFTs
formal visual field testing
MRI brain
de quervains phases
- hyperthyroid. painful goitre ESR
- euthyroid
- hypothyoid
- normal
thyroid globally reduced uptake
de quervains
Thyrotoxic storm
b blocker
propothyouracil
hydrocortisone
Causes of bitemporal hemianopia
Neoplastic - pituitary macroadenoma -suprasellar meningioma craniopharyngioma chiasmatic glioma
Non neoplastic aneurysm /ectatic carotid artery epidermoid cyst sarcoid dermoid cyst
Causes of carpal tunnel syndrome
Idiopathic soft tissue swelling pregnancy menopause gout acromegaly rheumatoid myxoedmea amyloidosis
Features of acromegaly
Prognathism cardiomegaly Colonic polyps macroglossia hepatosplenomegaly 30-50
Ix acromegaly
OGTT + measure GH
-failure of normal suppression of GH to < 2 in response to glucose load.
MRI pituitary adenoma
Mx acromegaly
Bromocriptine, cabergoiline
somatostatin analogues
External beam irradiation (older)
Younger, pressure sx. Transsphnoidal hypophysectomy.
Ix cushings
24 h urinary free cortisol
Overnight dex suppression test.
(1mg at midnight) then check 9am cortisol
mRI pituitary, petrosal venous sinus samploing - confirm pituitary source
Ix secondary HTN
CT adrenals Renal USS Dexsuppression test plasma metanephrines Renin: aldosterone ratio MIBG scan
Mx phaeo
alpha blockers - phenoxybenzamine
SIADH ix
urine osmolality >100
Urine Na >40
plasma osmolality <290
SIADH causes
Stroke, cancer lung abscess sepsis neuro disease
SIADH tx
Mild: fluid restriction
Severe: specialist - hypertonic NaCl 1.8% , controlled.
Demeclocycline if resistant.
Mx malignancy related hypercalcemia
IV fluids
Bisphosphonates (oral/IV)
Growth hormone deficiency in adults symptoms
Anxiety and depression body fat waist increase low libido fatigue isolation heat and cold sensitivity
Ix: AGHDA questionarre
Blood tests.
Thyroid storm precipitants
Thyroid/non thyroid surgery trauma infection acute iodine load (ct contrast media) DKA MI
thyroid storm features
fever tachy confusion N+V HTN HF LFTs Abdo pain
Thyroid storm Mx
IV fluids analgesia IV/oral propranolol Propothyouracil Hydrocortisone IV Cardiac monitoring Urgent endo review
Hyperthyroid mx: Carbimazole 40mg OD
Addisons features
Mouth pigmentation tiredness SOB Wt loss Polyuria Headaches Dizziness. postural hypotension
Hyponatremia
Hyperkalaemia
raised urea. (mineralocorticoid deficiency)
Addisons ix
random cortisol + matched ACTH
Short synacthen test. <550
if secondary, could be normal if onset within 4weeks.
if longstanding lack of ACTH, adrenals will atrophy.
Causes of primary addisons
Autoimmune. 70% post infectous (TB, fungal, HIV) 20%
Tx addisons
Hydrocortisone
Fludrocortisone.
Carcinoid syndrome features
Abdo pain Diarrhoea Weight loss Flushing (worse w Etoh/exercise) Hyper/hypotension Bronchospasm Dizziness Wheezing on exercise can get cushings.
Tumour in argentaffin cells produces 5HT. Most commonly appendix/distal ileum, 1/3 Mets (most to liver) Syndrome = Mets Asw MEN1. Tricuspid regurg/stenosis. 50-60%.
Carcinoid syndrome ix
Plasma serotonin
24h urine 5 HIAA
(check diet/drugs before)
CT CAP
Endoscopic ultrasound.
Somatostatin receptor scintigraphy.
Complications of Carcinoid syndrome
Vit B3 malabsorption (Pellagra)- diarrhoea, dementia, dermatitis.
Pulmonary stenosis
Hepatic mets
Desmoplastic tumours in mesentery.
Carcinoid syndrome mx
Antihistamines - itching and flushing.
Octreotide - block release of mediateors, diminishing effect tho,
Alpha interferon - reduce tumour size.
Surgical resection.
Ablation.
Chemo.
Loperamide.
DKA features
Anorexia lethargy polydipsia polyuria dehydration abdo pain vomiting coma Hyperventilation
Salicylate OD features
Dehydration Vomiting Hyperventilation Vertigo Sweating tinnitus hypokalaemia.
HHS features
longer deterioration
dehydration
glucose >35
Osmolality >340
DKA dx criteria
Glucose >11.1 /Known DM Ketonuria ++ bicarb <15 pH <7.3 metabolic acidosis with raised AG.
Causes of raised AG:
phosphate lactate ketones urate salicylate/biguanides poisoning.
AG equation
Na + K - (Cl + Hco3) = 10-18mmol/L
Mx DKA
- FLUIDS
14 G cannula in 2 ACFs
0.9% sodium chloride (1L bolus) -> 1L over 1h.
then 1L over 2-4h then 1L over 4-6h. - INSULIN
If glucose >20 + delay, IM 10U insulin.
otherwise 50U insulin 50ml 0.9% Sodium chloride (0.1u/kg/h)
- Replace Potassium .e.g. 40 mmol in 1L over 6h
if <3.5 -> HDU.
Cardiac monitor
Monitor GCS
get MSU, blood ketones, blood cultures, CXR, monitor U+Es, gucose, bicarb.
at 2h, and then 4h intervals.
Catheterise if no urine. aim 0.5ml/kg/h.
NGT if vomiting.
LMWH.
aim to reduce glucose 4-6/h, and bicarb >15. and correct acidosis.
once glucose <14 -> 10% dextrose. 125ml/h.
Resolution
Blood ketones <0.3
pH>7.3
bicarb >18.
once eating, 1+ less ketonuria -> SC insulin.
Causes of hypomagnesemia
GI - Diet, malabsorption, diarrhoea/vomiting, pancreatitis, alcohol.
MI
Renal failure, DM, DKA - insulin.
Diuretics, aminoglycosides, adrenergics
Symptoms: arrythmias, weakness, asthma. coma.
Osmolality equation
2 (na + K) + (urea + glucose)
280-300.
Phaeo sx
Sweats, anxiety restlessness chest tightness palpitations HTN
Precipitants: Stress, surgery parturition Smoking alcohol TCAs Cheese.
Tx: Alpha then B blockade.
Thyroid eye disease
Lid lag, lid retraction
More common in smokers.
Graves: proptosis, periorbital oedema, diplopia, grittines, increased tears.
Tx: artificial tears, eye ointment, dark glasses.
Diuretics, radiotherapy for oedema
visual acuity loss, colour loss -> optic nerve compression -> pred, surgery.
Tx Hyperthyroid
Carbimazole 30-60mg OD -> reducing according to t4.
for 12-18months/PTU.
or can give block replace 40mg/day for 6months plus thyroxine if hypothyroid.
B blockers - tremor, palps, agitation.
Surgery - total/subtotal thyroidectomy
complications: Recurrent laryngeal nerve palsy, hypoparathyroid, haematoma.
Radioiodine 1311.
Carbimazole SE
Agranulocytosis 0.1%
Maculopapular rash 5%
Pruritus
Jaundice
DM: definitions
Diabetes: Fasting glucose > 7 Glucose tolerance test (75g glucose) Plasma glucose >11.1 at 2h.
2h : 7.8-11.1 = impaired glucose tolerance.
impaired fasting glucose 6-7.
Diabetic retinopathy
BG:
Venodilation
Microaneurysms
Hard exudates
Preproliferative: soft exudates
Proliferative: new vessels.
hypertensive
Silver wiring
AV nipping
cotton wool spots/flame haemorrhages
papilloedema