Minimally Invasive Decompression for Lumbar Canal Stenosis

What is a minimally invasive decompression for lumbar canal stenosis?

This procedure is performed to relieve pressure on the spinal cord and nerve roots in the lower back.

A small cut is made in the back, over the site where the nerves are compressed.

Using x-ray for guidance, a tube retractor will be passed through the muscles and placed down on the spine. Through this tube, and using a microscope, bone and ligament and other material which are pressing on the spinal cord and nerves will be removed.

A small plastic tube (drain) may be inserted to allow any residual fluid to be drained away. This will be removed within 24 – 48 hours.

The cut is closed with stitches or staples.

My Anaesthetic

This procedure will require a General Anaesthetic.

See About your Anaesthetic information sheet for information about the anaesthetic and the risks involved. If you have any concerns, talk these over with your doctor.

If you have not been given an information sheet, please ask for one.

What are the risks of this specific procedure?

There are some risks/complications with this procedure.

Common risks include:

• Infection. This may need antibiotics and further treatment.
• Minor pain, bruising and/or infection from IV cannula site. This may require treatment with antibiotics.

Uncommon risks include:

• Bleeding. A return to the operating room for further surgery may be required if bleeding occurs. Bleeding is more common if you have been taking blood thinning drugs such as Warfarin, Asprin, Clopidogrel (Plavix or Iscover) or Dipyridamole (Persantin or Asasantin).
• A heart attack because of the strain on the heart.
• Stroke or stroke like complications can occur which can cause weakness in the face, arms and legs. This could be temporary or permanent.
• Nerve root injury. This may be temporary or permanent.
• Injury to the covering of the spinal cord/nerve. This may require further surgery.
• Ongoing persistent back and leg pain, with possible leg numbness due to nerve damage from compressed nerve roots. This may require further surgery.
• Leakage of cerebrospinal fluid. This may need further surgery.
• Visual disturbance. This may be temporary or permanent.
• Small areas of the lung may collapse, increasing the risk of chest infection. This may need antibiotics and physiotherapy.
• Increase risk in obese people of wound infection, chest infection, heart and lung complications, and thrombosis.
• Clots in the leg (deep vein thrombosis or DVT) with pain and swelling. Rarely part of this clot may break off and go into the lungs.

Rare risks include:

• Paraplegia. This may require further surgery. This may be temporary or permanent.
• Death is very rare due to this procedure.