MRCS Classification Systems Flashcards
Describe Salter Harris classification
1 - S - Straight through physis
2 - A - through and Above physis into metaphysis
3 - L - through and beLow physis into epiphysis
4 - T - Through metaphysis, physis, epiphysis
5 - ER - Erasure/cRush injury of physis
Most common salter Harris fracture?
Type 2 - through physis and up into metaphysis
Weber fracture classification?
C - through fibula above syndesmosis
B - through fibula at level of syndesmosis
A - through fibula below syndesmosis
Garden hip fracture classification?
1 - incomplete undisplaced
2 - complete undisplaced
3 - complete, partial displacement
4 - complete, complete displacement
TNM of lung Ca?
T1 - less than 3cm tumour
T2 - 3-7 cm or involving main bronchus, invading visceral pleura or causing atelectasis/pneumonitis
T3 - over 7cm or directly invading parietal pleura, chest wall, diaphgram, phrenic nerve or near carina of main bronchus
T4 - invasive tumour into surrounding structure
How are thymomas classified and staged?
Masaoka classification
What is sensitivity?
True positive over all who have condition (a/a+c)
What is specificity?
D/b+d - true negatives out of everyone who doesn’t have it
Positive predictive value?
A/a + b
True positives over all positives
Negative predictive value?
True negatives over all test negatives
D / d+c
What is positive LR?
Sens / 1 minus spec
Whst is negative LR?
1-sensitiviry over specificity
What are the 3 components of Nottingham index? How do scores relate?
Tumour size
Lymph nodes
Histological grade
Big score is bad
What is the local anaesthetic of choice for Biers block? Max doses?
Prilocaine
Max 6mg/kg without, 9mg/kg with adrenaline
Max doses of bupivocaine? Main drawback?
2 or 2.5mg per kg
Highly cardiotoxic
