OSCE Flashcards
Criteria for adequacy on a CXR
RIPE
Rotation - med borders of clavicles equidistant from spinous process
Inspiration - at least 5-6 ant ribs visible above diaphragm
Picture area - lung apices, costodiaphragmatic recesses, scapula out of the way
Exposure - vertebral bodies should be just visible through the lower part of the cardiac shadow
CXR abnormalities in COPD
Hyperinflation Flattened hemi-diaphragm Dec lung markings Black lesions (bulla) Prominent hila
Structure for interpreting a MSK XR
ABCS Alignment - dislocation or subluxation Bones - fractures Cartilage - joint spaces Soft tissue - swelling, disruption, foreign bodies
Structure for describing a fracture
SOD
Site - intra v extra-articular, position (prox/mid/distal third)
Obliquity - completeness, direction, open v closed, condition of bone (comminuted, segmental etc)
Displacement - angulation, translation, rotation
Structure for assessing the P wave. Common abnormalities?
Height <2 small squares (inc in RA hypertrophy - P HTN)
Morphology - bifid in MS, peaked in RA hypertrophy
Normal PR interval length. Common abnormalities?
3-5 small squares
Dec in accessory conduction pathways
Inc in HB
System for assessing the QRS complex
R wave progression
Length (rhythm strip) - <3 small squares
Height (V1, V5/6) - <4 small squares
Q waves
Causes of delayed R wave progression
RV enlargement (chronic LD)
What are pathological Q waves?
Abnormal large Q waves due to established/previous MI
Causes of saddle shaped ST segment
Pericarditis
Tamponade
In which leads would we accept T wave inversion?
III, aVR and V1
Normal QTc length. Causes of abnormalities?
<450ms
Inc predisposes to polymorphic VT
Most common organism causing IE?
Staph aureus
Most common organism causing IE on prosthetic valves?
Staph epidermidis
ABx for IE on native valve, or a prosthetic valve >1yr old
Ampicillin + fluclox + gent
Vanc + gent if pen allergy
ABx for IE on new prosthetic valve
Vanc + gent + rifampicin
What colour are gram +ve and -ve bacteria?
\+ve = purple/blue -ve = pink/red
How do penicillins work? Give 5 examples and when they’re used
Inhibit cell wall synthesis
- Penicillin G -> gram +ve strep (chest, throat, endo)
- ampicillin/amox -> URTI, sinusitis, chest, otitis media, UTI, H P
- co-amox -> chest, pyelonephritis, cellulitis, bone
- tazocin (piperacillin+tacobactam) -> broad spec (gram +ve and -ve
- fluclox -> staph (skin, bone)
How do cephalosporins work? Give an example and when you’d use it
Inhibit cell wall synthesis
- ceftriaxone -> broad spec (CAP, HAP, UTIs, skin, bone, meningitis)
How do carbapenems work? Give an example and when you’d use it
Inhibit cell wall synthesis
- meropenem -> broad spec (+ve, -ve, aerobes, anaerobes)
How do lipopeptides work? Give 2 examples and when you’d use them
Inhibit cell wall synthesis
- Vanc
- Teicoplanin
Complicated +ve (incl MRSA), C Diff
How do aminoglycosides work? Give an example and when you’d use it
Inhibit protein synthesis
- gent -> -ve
How do macrolides work? Give 3 examples and when you’d use them
Inhibit protein synthesis
Azithromycin, erythromycin, clarithromycin
+ve cocci - chlamydia (not entero or staph)
How do tetracyclines work? Give an example and when you’d use it
Inhibit protein synthesis
Doxycycline - COPD exac, chlamydia, MRSA, malaria proph
How do folate synthesis inhibitors work? Give an example and when you’d use it
Inhibit nucleic acid synthesis
- trimethoprim -> -ve: UTI, prostatitis
How do fluoroquinolones work? Give an example and when you’d use it
Inhibit nucleic acid synthesis
- ciprofloxacin -> broad spec: UTI, prostatitis, HAP, infectious diarrhoea
How does metronidazole work? When would you use it?
Inhibits nucleic acid synthesis
Anaerobic - intra-abdo, pelvic, oral, C. Diff
How does rifampicin work? When would you use it?
Inhibits nucleic acid synthesis
Mycobacteria (TB)
Surgical site infection organism and treatment
Staph aureus (G +ve) Flucloxacillin (+gent if severe)
Abx against staphlococcus
Penicillins
Abx against streptococcus
Penicillins
Most common cause of CAP. Therefore what ABx do you prescribe?
Strep pneumoniae, gram +ve -> Amoxicillin and/or clarithromycin (depending on CURB)
Abx for H Influenzae
Gram -ve -> cephalosporin eg cefuroxime
Abx for pseudomonas
Gram -ve -> ciprofloxacin
Most common cause of infectious GI disease
Norovirus
ABx in acute appendicitis
Tazocin (piperacillin/tazobactam
ABx in acute cholecystitis
Co-amoxiclav
ABx in ascending cholangitis
Tazocin (piperacillin/tazobactam)
ABx in acute abdomen (incl peritonitis)
Tazocin
Treatment of asymptomatic bacteriuria
Don’t use ABx in non-pregnant women, men and adults with catheters unless they have symptoms
Treatment of UTI in non-pregnant woman
3days nitrofurantoin if GFR>45, or trimethoprim
If this fails, culture urine
Treatment of an upper UTI in a non-pregnant woman
Culture
Broad spec ABx (e.g. Co-amoxiclav)
Treatment of UTI in men
7d nitrofurantoin if GFR>45, or trimethoprim
Treatment of septic arthritis
Aspirated and culture
Start empirical ABx whilst awaiting culture - follow local guidelines
Consider Flucloxacillin, vanc, cefuroxime
4-6wk total
Treatment of acute bronchitis
Amoxicillin 5d
Or doxycycline 5d
ABx in bronchiectasis
Amoxicillin 10d
Or clarithromycin 10d
ABx in acute diverticulitis
Co-amoxiclav 7d
Or ciprofloxacin + metronidazole 7d
Most common cause of osteomyelitis in adult?
Staph aureus
Main organisms in bronchiectasis
H influenzae
Strep pneumonia
Staph aureus
Pseudomonas
Common causes of septic arthritis
Staph aureus
Streptococci
Neisseria
Gram neg bacilli
Organism most likely responsible for COPD infective exac
H influenzae
Most likely cause of nephrotic syndrome in a 32yo male
FSGS
Most common cause of hepatocellular carcinoma in the UK
Hep C
Treatment of osteomyelitis
Vancomycin and cefotaxime
Symptoms to ask about in acromegaly
Headaches Change in appearance - hands, face, dental changes Change in voice Sleep apnoea Carpal tunnel Excessive sweating Amenorrhoea
Outline of exam for acromegaly
End of bed - height, size Hands - size, skin fold thickness, OA, sweaty, carpal tunnel Pulse and BP Face - prominent, acne, macrognathia, visual fields (bitemp hemi), spaces between teeth Neck - JVP (cardiomyopathy), goitre Chest inspection Heart sounds Proximal myopathy Gait
“To complete exam” in acromegaly
CV exam
Thyroid exam
Formally test visual fields
Further investigations:
- Oral glucose tolerance test with GH measurements
- blood and urine glucose - DM
- MRI pit - adenoma
- ECG - cardiomyopathy