Epidural anesthesia through several levels, please?

Skin -- supraspinal ligament -- intervertebral ligament -- ligamentum flavum -- epidural space

Skin is generally broken with a thicker needle, so there is no sense of breakthrough;

When the needle encounters resistance it means it has reached the supraspinal ligament, it has passed through the supraspinal ligament, and usually the needle is held in place, which is what we call a clamp.

You don't feel anything unusual when you go through the intervertebral ligament;

Is required when once again met with resistance has arrived in yellow ligament (of course also probably not through yellow ligament resistance), an obvious lost feeling, after being worn specification has reached the epidural space.

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