Mnemonics Flashcards
Inputs of vomiting centre
CHILL - Barf Prep
CTZ, higher cortical centres, GIT, labyrinth, limbic system, baroreceptors, peripheral pain pathways
Liver functions
BSC SMID
Biotransformation, synthetic, capacitance, storage, metabolic, immunological, digestive.
Hypoxia
HASH
Hypoxic, anaemic, stagnant, histotoxic
Osmolality and osmolarity
OsmoLality in the Lab but not in Litres
Osmolality = osmoles/kg of solvent (more accurate as not temperature dependent) Osmolarity = osmoles/L of solution
Describing a drug
Physicochemical: chemical structure, presentation, storage
Indications, contraindications, dose, toxicity
PD: mechanism, effects by system
PK: ADME
Mechanisms of heat loss
RCECR
Radiation (40%), convection (30), evaporation (15), conduction (10), respiration (5).
Layers of adrenal cortex
GFR ACT
Glomerulosa, fasciculata, reticularis (outer to inner)
Aldosterone (mineralocorticoids), cortisol (glucocorticoids), testosterone (androgens) respectively
Medulla makes NA and A from chromaffin cells
Catecholamine synthesis
Please: Long Live DNA
Phenylalanine, L-tyrosine, L-dopa, dopamine, NA, A
Roles of endothelium
V SCOF BID
Vasomotor tone, secretion (ACE) coagulation (damage –> exposure of tissue factor), osmosis, filtration, barrier, inflammation, diffusion
Types: continuous (BBB), discontinuous (sinusoids), fenestrated (glomeruli)
Risks of transfusion
RIM(ember): Transfusion Has Its Downsides
Reactions (haemolytic, febrile), infection (bacterial, viral, parasite, prion), metabolic (low Ca, high K, acidosis if liver failure), TRALI/TACO/GVHD, hypothermia, iron overload, depletion of platelets/clotting factors (5 and 8).
RBC storage solutions
ACCS
ACD, CPD, CAPD, SAGM (in order of increasing RBC survival)
Coagulation: classical and cell based
XTF
X to Xa, prothrombin to thrombin, fibrinogen to fibrin –> clot
Cell based: initiation, amplification, propagation
Oral hypoglycaemics
The Big Sugar Daddy: Missing In Action
Increase insulin sensitivity
- Thiazolidinediones (pioglitazone)
- Biguanides (metformin)
Increase insulin secretion
- Sulphonylureas (gliclazide)
- Dipeptidyl peptidase IV inhibitors (sitagliptin)
- Meglitinides (repaglinide)
- Incretin mimetics (exenatide)
Other
- Alpha glucosidase inhibitors (acarbose) - reduce carbohydrate absorption
Mechanisms of drug action
RENT-a-HIP
Receptors, enzymes, neurotransmitters, transport systems, hormones, ion channels, physicochemical.
Factors influencing drug absorption (and passage across placenta)
CLIPPR-M
Concentration gradient (Fick’s law), lipid solubility, ionisation and pKa, protein binding, route of administration, molecular weight (Graham’s law).
Extra factors for placenta:
- pH maternal blood and fetal blood (more acidotic fetus means more basic drugs will cross e.g. opioids and LAs –> ion trapping)
- placental blood flow
Also thickness of membrane and surface area.
Laminar vs turbulent flow
LV has DTs
Laminar - viscosity most important
Turbulent - density most important
Paediatrics
WET FLAG
Weight = (age + 4) x 2 --> superseded Energy = 4J/kg Tube = diameter = (age/4) + 4; length = (age/2) + 12 (or +15 for nasal) Fluids = 20ml/kg Lorazepam = 0.1mg/kg Adrenaline = 0.1ml/kg of 1:10:000; atropine = 20mcg/kg Glucose = 5ml/kg of 10%
BP = (age x 2) + 80 (median systolic value)
Fluid deficit: each % deficit means 10ml/kg deficit to be replaced over 48h
Adrenaline for anaphylaxis = 0.01ml/kg of 1:1000 IM
Receptor types
Let’s Go To India
Ligand gated ion channel (nAChR, GABA-A), G-protein coupled (opioid, adrenoceptors, mAChR), tyrosine kinase (insulin), intracellular (steroid, thyroxine)
In order of increasing time taken for response (ms, s, min, hours)
ICU daily review
FLATCHUG
Feed/fluids, lines/devices, analgesia/aperients/abx, thromboprophylaxis, communication, hydration/head up, ulcer prophylaxis, glycaemic control
Difficult BMV
OBESE
Obese, bearded, elderly (>55), snorers, edentulous