Anaesthetics

Question 1

Ideal local anaesthetic

Answer 1

Lox toxicity
high potency
rapid onset
long duration

Question 2

Dosage 0.5%, 1%, 2%

Answer 2

0.5%=5mg/ml
1%=10mg/ml
2%=20mg/ml

Question 3

Lidocaine with or without adrenaline

Answer 3

with: 5mg/kg
without: 3mg/kg

infiltration, nerve block and epidurals

Question 4

Bupivicaine

Answer 4

with: 3mg/kg
without: 2mg/kg

infiltration, nerve block, epidurals and spinals (high cardiotoxicity)

Question 5

Prilocine

Answer 5

with: 6mg/kh
without: 6mg/kg

Regional nerve block
Bier’s block

Question 6

Brachial plexus block types

Answer 6

Interscalene block (trunks)
supra/infraclavicular block (division)
Axillary (cords)

Question 7

Femoral nerve

Answer 7

Arises from L2-4 and passes downwards on posterior wall in the groove between psoas and iliacus muscles

Passes below the inguinal ligament atop ileopsoas and enters the thigh lateral to the vascular bundle and femoral sheath

Femoral nerve then divides into the femoral triangle and supplies anterior thigh, cutaneous nerves of the anterior thigh and saphenous nerve

Femoral block for anterior thigh, knee and femur

Question 8

Sciatic nerve

Answer 8

L4-S3 origin and exits under biceps femoris becoming the common peroneal and tibial nerve running under the back of the thigh under adductor magnus

Block suitable for ankle and food surgery. SCiatic nerve lies 2cm lateral to the ischial tuberosity and the level of the greater trochanter. Can take up to 60 mins to achieve block.

Question 9

page 512

Answer 9

page 512