Community health and GP Flashcards
(175 cards)
What is anaphylaxis?
rapid onset of type 1 IgE hypersensitivity reaction that develops after pt is exposed to something - life threatening emergency
Causes of anaphylaxis?
insect stings, nuts, other food, abx, IV contrast, other medications
Clinical features of anaphylaxis?
skin reactions: widespread urticaria, itching, flushed skin
Resp: swollen tongue/lips, sneezing, wheeze
GI: abdo pain, nausea, vomiting, diarrhoea
Tachycardia
hypotension
serum levels of mast cell tryptase can be measured to confirm dx
Management of anaphylaxis?
remove trigger
call for help
ABCDE assessment
Administer O2
Lie pt flat, raise legs
Administer adrenaline - adult dose 500mg IM
admisiter chlorophenamine and hydrocortisone
IV fluid if hypotensive
Mechanism of action of donepezil and rivastigmine?
Acetylcholinesterase inhibitor - increases the availability of the neurotransmitter acetylcholine
What is mechanism action of memantine and when is it used?
Glutamate receptor antagonist - used in severe alzheimer’s disease
Which drug classes commonly cause delerium in the elderly?
benzodiazepines, opiaes, antiparkinsonian agents, tricyclic antidepressants, digoxin, beta blockers, steroids, antihistamines (chlorphenamine)
What is predominant toxic protein in alzheimer’s disease?
beta-amyloid
Which form of dementia is seen frequently in motor neuron disease?
frontotemporal dementia
What is semantic memory and in which dementia is this most affected?
the ability to associate meaning to objects presented via visual or auditory modalities - frontotemporal dementia
How does normal pressure hydrocephalus present?
urinary incontinence, gait instability, cognitive chnage
definitive treatment options for normal pressure hydrocephalus
ventriculoperitoneal shunt
Mechanism of action of tricyclic antidepressants
mixture of serotonin reuptake inhibition, noradrenaline reuptake inhibition, antimuscarinic activity and anti-histamine activity
What kind of drug is paroxetine?
SSRI
Sedation is most strongly associated with which type of antipsychotic?
typical
Name 3 atypical anti-psychotics
olanzapine, clozapine, risperidone
name 3 side effects of atypical anti-psychotics
weight gain, metabolic syndrome, agranulocytosis
Cautions with tricyclics
CI in those with previous heart disease, exacerbate schizophrenia, may exacerbate long QT syndrome
use in caution in pregnancy and breastfeeding
may alter blood sugar in T1 and T2 diabetes
may precipitae urinary retention - avoid in men with enlarged prostates
side effects of tricyclic anti depressants
2nd line medication
urinary retention, drowsiness, blurred vision, constipation, dry mouth
What kind of drug is amitryptiline
tricyclic antidepressant
What is iron deficient anaemia
caused by an increased loss of iron, reduced intake or malabsorption
Causes of iron deficient anaemia
increased loss: menorrhagia, GI bleeding, hookworm
Reduced intake: poor diet
Malabsorption: coeliac, IBD
Clinical features of iron deficient anaemia
lethargy, tiredness, weakness, jaundice, heavy periods, change in bowel habit
Dx of iron deficient anaemia
clinical sx
hypochromic, microcytic red cells
total iron binding capacity (TIBC) and ferritin may confirm dx