The difference between spinal anesthesia and epidural anesthesia needle

Spinal anesthesia spinal anesthesia epidural anesthesia

Mechanism of action: Block the anterior and posterior roots of the spinal nerve and spinal cord Block the spinal nerve roots

Position of action: the subarachnoid space, the gap is positive pressure The spinal epidural space, the gap is negative pressure

Pre-anesthesia medication: Barbiturates Barbiturates

Commonly used local anesthetics: bupivacaine, ropivacaine, lidocaine, tetracaine

 Puncture point: Lumbar spine 2, 3 gap or lumbar spine 3, 4 gap Lumbar spine 2, 3 gap or lumbar spine 3, 4 gap

 Indications: Anesthesia for surgery below the lower abdomen Mainly for abdominal surgery, less used for chest and neck surgery

Contraindications: The two common include: infection at the puncture site; disease in the central nervous system; shock to disable the spine

Intra-tube anesthesia; disabled for mental illness, children, neurosis; lumbar and back trauma, intervertebral disc protrusion

Intravertebral anesthesia is also forbidden for patients with cancer, bone metastases, etc.

Different: Epidural anesthesia cannot be used for those with poor coagulation function, but spinal anesthesia can be used. No high blood pressure

Coronary artery disease can be treated with spinal anesthesia, but epidural anesthesia is not allowed.

Complications: postoperative headache (the most common) nausea and vomiting. 1. Enter the subarachnoid space by mistake or insert the needle too deeply

 lead to total spinal anesthesia (the most serious); 2. puncture the pleura to produce pneumothorax; 3. coagulation

Poor function leads to epidural hematoma; 4. The puncture needle erroneously enters the blood vessel to cause toxic reaction

5. Air embolism; 6. Spinal cord or nerve root injury.

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