Ankle Block Flashcards
How many nerves innervate the foot?
Five Nerves
1) Superficial peroneal nerve
2) Deep peroneal nerve
3) Saphenous nerve
4) Tibial nerve
5) Sural nerve
What nerves are branches of the sciatic nerve?
All except saphenous nerve
Saphenous nerve is a branch of what nerve?
Femoral nerve
What are the indications of ankle block?
Anaesthetic technique for forefoot surgery
Post-operative analgesia for midfoot surgeries under GA
What are the contraindications of ankle block?
Infection at the site of the block
Severe peripheral arterial disease with risk of local necrosis
Patient refusal
Coagulopathy
What must be avoided when injecting LA?
Adrenlaine or epinephrine
What are complications of ankle block?
Intravascular injection
Hematoma
May affect mobilization if priorpiception is affected
What does saphenous nerve innervate?
anterio and posterio medial aspect of the lower leg from above the knee to the foot
“medial leg and calf”
What does tibial nerve innervate?
the skin of the posterolateral leg, lateral foot and the sole of the foot
posterior compartment of the leg and the majority of the intrinsic foot muscles.
What does deep peroneal nerve innervate?
ankle extensors muscle and ankle joint and web spaces between the 1st and 2nd toes
What does superifical peroneal nerve innervate?
anteriolateral aspect of the leg and dorsum of the foot except the sides of the 1st and 2nd toes
What does sural nerve innervate?
lateral and dorsal aspect of the ankle and foot and great toe
At what level does the superifical peroneal nerve bifurcate?
1 cm above the lateral malleoli
bifurcate into medial dorsal cutaneous nerve and intermediate dorsal cutaneous nerve
At what level does the tibial nerve bifurcate?
Just above the calcaneus, at the level of the medial malleoli
Bifurcates into: medial calcaneal nerve, lateral and plantar nerves
Which nerves require subcutaenous injections?
sural, superifical peroneal, saphenous nerves
