Epidural needle puncture method

The main purpose of both direct and lateral approaches is to puncture into the epidural space, and the ligamentum flavum is the necessary path for both. However, epidural puncture has had a certain failure rate over the years, whether direct or lateral. In general, epidural puncture should be successful unless there is severe ossification of the early yellow zone (ankylosing spondylitis, etc.). Mainly with needle puncture in yellow ligament, brine injector, pressure, injection is blocked, continue to pressure, at the same time promote the needles, brine was suddenly relaxed injection, into the epidural space. This method with an ejector pressurized salt water can't be injected under continuous pressure, promote the needles, brine was suddenly relaxed and injection process, as long as the needle into the yellow belt, pressurize syringes are unable to maintain the pressure inside the syringe, yellow ligament is thicker, brine after entry into the system of yellow belt is not injection, break through the yellow ligament into the epidural space after salt water can be easily injection. So epidural wear your success rate is almost one hundred percent. So, the surest indicator of epidural success is finding the ligamentum flavum, not looking for a breakthrough.

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