1. Purpose of Surgery
Remove the herniated sac, decompress the adhesions of the spinal cord and nerve roots, repair soft tissue defects, avoid cyst rupture, and prevent traction of neural tissue.
2. Timing of Surgery
The operation for spinal meningocele should be performed within 12-24 hours after birth; for simple meningocele, surgery should be performed 1-2 weeks after birth, and if conditions permit, it is safer to delay the operation to 2-3 months after birth; for those with thin cyst walls and a possibility of rupture and secondary infection, emergency surgery should be performed; if the cyst wall is eroded and there is infection or cerebrospinal fluid leakage, active infection control should be carried out, and surgery should be performed after the wound surface is clean or nearly healed.
3. Surgical Method
Take a prone position with the buttocks elevated and the head low to avoid losing too much CSF during surgery. For deformities at the lumbosacral region, a transverse ellipse incision is recommended to prevent contamination of the wound by urine and feces. The key points for handling during surgery are as follows:
1. Management of nerve tissue Incise at the junction of the base of the herniated sac and the normal skin, up to the paravertebral muscle fascia, to find the neck of the sac. Then, incise on the side of the neck to avoid injury to the nerve tissue located in the central part of the sac. Carefully dissect and decompress the spinal cord and spinal nerves, and bring them back into the spinal canal. If it is difficult to decompress or reposition, the upper endplate can be excised to expand the spinal bifida, so that the dissection and decompression is satisfactory.
2. Closure of the dura mater Determine the dura mater at the upper end of the lesion, divide towards both sides, and then suture the dura mater at the site of the lesion from top to bottom, freeing it from the paravertebral muscle fascia. Suture or tension-reducing suture the paravertebral muscles and their fascia to reinforce them.
3. Management of concurrent spinal deformity Perform laminectomy and metal wire fixation of the spine to treat spinal kyphosis and other deformities.
4. Repair of skin defects Remove transparent or thin-film-like skin, suture in two layers, and the suture should not be tense. It is only necessary to perform subfascial dissection at the fascial plane, and most skin defects can be sutured; when the skin defect exceeds half of the back, special skin flap transfer or free skin grafting treatment should be adopted.
4. Postoperative Management
After surgery, it is recommended to adopt a prone position with the head low to reduce the hydrostatic pressure of CSF on the repaired area. If there is a wound dehiscence or cerebrospinal fluid leakage, it is mostly due to progressive hydrocephalus, and external ventricular drainage or ventriculoperitoneal shunting should be performed.