Sub Tenon’s block is another very convenient alternative that was once tried out almost 100% of patients in Aravind Eye Care System
Technique and video links
1)after lid speculum is inserted..I put paracaine eye drops …then gave the betadine wash
2)I take about 5 ml of lignocaine without hylase in a syringe and put visco canula on it.
3)Hold the conjunctiva & subtenons tightly & lift up.
4)with the vannas scissors make a small nick & enter subtenons space.
5) insert the cannula gently & go along the curve of the globe for half the length of the cannula & gently push the plunger.u may ask the patient to look down
6) Give pressure for a minute
7)the action is instantaneous & u can just proceed with the surgery
8)The chemosis is minimal…but if u inject sub conjunctivally…then lots of chemosis,but still u can proceed with the surgery…
It saves lot of lignocaine and your hylase too
2 ml is enough.