Choice of dural puncture needle

The advantages and disadvantages of the straight entry method and the side entry method. Straight entry method: Disadvantages 1. There are more tissues through, so the damage is greater. 2. The heavier "pin" may cause dura mater to leak. 3. Once the ligamentum flavum is calcified, puncture is extremely difficult. 4. The catheter is easy to be clamped after the tube is placed, which makes it difficult to inject liquid. Advantages The incidence of postoperative low back pain is low. The side entry method is the opposite. But it’s not absolute, it has to do with your experience and technique

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