Complications of dural puncture anesthesia needle, puncture needle or catheter strayed into blood vessel

The epidural space is rich in blood vessels. It is not uncommon for puncture needles or catheters to stray into the blood vessels, especially in full-term pregnant women. It is more likely to stray into the blood vessels due to the expansion of the epidural vena cava.

Measures to prevent puncture needles or catheters from penetrating the blood vessels include: the catheter should be inserted through the dorsal midline approach; the tip of the catheter should not be too sharp; after the catheter is in place, gently aspirate before injecting local anesthetics to verify whether there is blood; routine Inject the test dose of local anesthetic through the catheter; if there is blood stain in the catheter and the syringe containing the local anesthetic, be aware of the possibility of the catheter entering the vein.

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