Transition/Extras Flashcards
Sciatica for 4 weeks, what sign is most likely?
Reduced plantarflexion
Inversion injury to right ankle after stumbling off kerb - what fracture is most likely?
Avuslion fracture to 5th metatarsal
Localised pain at left iliac crest worst on lateral flexion of spine?
Erector spinae
What muscle does adduction/extension of shoulder and internal rotation of humerus?
Lattisimus Dorsi
Femoral nerve roots?
Obturator nerve roots?
Sciatic nerve roots?
Pudendal?
Fem - L2-4
Out - L2-4
Sci - L4-S3
Pud - S2-4
Definition of aplastic process?
Poor differentiation - hard to tell where cells have come from
3 most common locations for cancer in kids?
Bone, Brain, Blood
What cell responds to foreign bodies?
Histiocyte (aka Macrophage)
Which cause of bleeding in pregnancy causes no increased hCG?
Placenta praevia
Vasa praevia
Causes of pseudohyponatraemia?
Myeloma, hyperlipidaemia
high proteins/lipoproteins therefore less space for sodium to dissolve
This is NOT COMMON
What are most coliforms sensitive to?
Gentamicin
Gm -ve rods e.g. E. coli and Pseudomonas
Penicillins will never work on these
Treatment for intra-abdominal sepsis?
If pen allergic?
Amox, met, gent
If pen all: vanc, met, gent
Most likely cause of meningitis in:
- neonate?
- Kid <4
- Young adult
- Adult
- Elderly
neo - group B strep, e coli, listeria
<4 - HiB
teen - strep pneumo (if fresher then meningococcal)
Adult - strep pneumo
elderly - strep pneumo, amox
Causes of granuloma formation?
Macrophages secreting IL-12
Lymphocytes secreting IFN-gamma
What happens to T-cells whose antigen receptors bind strongly to self-antigens?
Killed off in thymus during development
Which surface receptor is involved in transplant rejections?
MHC
What to alpha/beta T cells recognise which are present on proteins?
Epitopes
Intracellular microorganisms within macrophages are more readily killed in the presence of what?
IFN - which comes from Th cells
What kills virally infected cells?
Tc and NK cells
Plasma cells secrete antibodies that are identical to what?
The one that is on the surface of the parent B cell
Role of IL-2?
Causes clonal proliferation of lymphocytes
Role of IFN-alpha/beta?
produced by virally infected cells which stimulates response from Tc and NK cells
Role of TNF?
Causes neutrophil infiltration and fever - acute inflammation
Screening for coeliac?
IgA anti-TG antibody
H1 receptor antagonists?
H2 receptor antagonists?
H1 - hypersensitivity
H2 - sedation, GORD
IgE molecules attach to mast cells via what?
Fc - constant region
Type I hypersensitivity?
Type II?
Type III?
Tive IV?
I - IgE mediated - mast cell, basophil, eosinophil - allergies
II - cytotoxic - antibody + antigen induced cell lysis - e.g. haemolytic anaemia, Rh incompatibility
III - immune complex mediated - IgG + IgM - e.g. SLE (can cause kidney damage)
IV - cell-mediated (delayed) - T cells - e.g. chronic transplant rejection, MS, RA
Neutrophil immunodeficinenct?
Chronic granulomatous disease - shortage of NADPH oxidase - recurrent pneumonia
B cell deficiency?
Selective IgA deficiency - most common primary antibody deficiency - recurrent URTI - assoc w coeliac disease and transfusion reactions
T cell deficiency?
Di George syndrome - deletion on chr 22 - failure to develop 3rd and 4th pharyngeal pouches - heart defects, learning difficulties, hypocalcaemia, recurrent infection, cleft palate - NO THYMUS
Combined T and B deficiency?
SCID - X-linked - defect in gamma chain - defective IL-2 - recurrent bacterial and fungal infection
What activates peripheral chemoreceptors?
pO2 and H+
What does low pO2 cause in pulmonary vasculature and why?
How does this compare to systemic circulation?
vasoconstriction - don’t want bring in CO2 too quick - V/Q match
In systemic, low pO2 causes vasodilation
Barrel shaped chest?
COPD
Rifampicin induces enzymes - how does this affect Km and Vmax?
unchanged Km (conc at which drug works to half of Vmax)
Increased Vmax (conc at which drug works best)
On line weaver burke what is Km and Vmax?
Km - Intersection with y axis
Km - intersection with x axis
Patient on viagra who collapses - interaction?
Nitrate
Statin + grapefruit juice?
Myalgia
+ drowsiness, dizziness, headache
Pain relief for OA patient on warfarin?
Paracetamol
Function of erector spinae?
extension and lateral flexion of spine
Only CN to run through the middle of cavernous sinus?
CN VI
Pharmacodynamics?
Pharmacokinetics?
Dyna - what drug does to body
Kine - what body does to drug
Autonomy?
Justice?
Non - maleficence?
Beneficience?
Aut - pt’s right to make a choice based on personal values + beliefs
Justice - treat others equally, distribute benefit/burden fairly
Non-maleficence - do no harm
Beneficience - provide benefit
Epidemiology triangle?
Agent, host, environment (time in middle)
Sensitivity?
Specificity?
sens - how good it is at picking up disease
Spec - how good it is at not picking up other diseases
How long to check for signs of life?
How long to breathe out for?
Child CPR?
Adult CPR?
10 secs
1 sec
Child - 5 breaths then 15:2
Adult - 30:2
Case control trial?
People are matched to a control in order to get results
Cross section?
Group of people in one snapshot - time and space
RUQ pain radiating to shoulder?
cholecystitis
Portal triad?
bile duct
portal vein
hepatic artery
Loss of consciousness on turning head?
vertebrobasilar insufficiency
Alteration between diarrhoea and constipation?
diverticular disease
Mid diastolic murmur, tapping, undisplaced apex, best heart in left lateral position with bell?
mitral stenosis
systolic murmurs radiating to axilla?
mitral regurg
best heard when patient sits up, fully expires and stethoscope placed on left sternal border?
aortic regurg
Causes of neonatal conjunctivitis?
Gm +ve cocci (S aureus)
Chlamydia
Gonorrhoea
Vaccine givent o kids with asthma?
seasonal flu
Vaccine given to newborns of IVDU
HepB
Milestones:
standing?
smiling?
simple instructions?
stand - 12 months
smile - 6 weeks
simple instructions - 18 months
Ix for malrotation (bilious vomit)?
upper GI contracts with follow through
Reflex anoxic seizure?
paroxysmal, spontaneously reversing brief episodes of systole triggered by pain, fear or anxiety - due to increased vagal tone (bump to head, transient systole and collapse)
Triad of ADHD?
Triad of autism?
hyperactivity, impulsivity, inattention
social, communication, repetitive behaviour
Aspergers only social
Muscle problem in C5?
rotator cuff
Muscle problem in C8
medial hand (small finger)
Mid dilated pupil?
acute closed angle glaucoma
Altitudinal field defects?
Ischaemic optic neuropathy
Flame-shaped haemorrhage?
diabetic retinopathy - more superficial - rupture of microaneurysm
(dot/blot haemorrhage more deep)
tearing, photophobia, reduced vision, redness?
scleritis
Motor supply to tongue?
All hypoglossal
Except palatoglossus which is vagus
SCC?
hyperkeratotic, crusted lump, fast growing
Where is breslow thickness measured from? <1mm? 1-2mm? 2.1-4mm? >4mm?
granular layer to deepest point of invasion
<1mm - 95-100% 5-year survival
1-2 - 80-96%
2.1-4 - 60-75%
>4 - 50%
How do robertsonian translocations work? Common one?
2 acrocentric chromosomes join together (e.g. 12 and 14) in one parent.
When reproduce with another normal person, 4 possibilities:
- Normal
- Balanced translocation
- Trisomy 14 - mosaic - miscarriage
- Trisomy 21 - Down Syndrome