MILD Procedure (Minimally Invasive Lumbar Decompression)
A straightforward Guide for Patients
What Is the MILD Procedure?
The MILD procedure—short for Minimally Invasive Lumbar Decompression—is a technique used to treat lumbar spinal stenosis, a condition where the spinal canal becomes narrow and compresses the nerves.
This narrowing is often caused by thickened ligaments, small bone spurs, or age-related changes in the spine. These changes can make standing or walking painful, while sitting often brings relief.
The MILD procedure removes a small amount of excess ligament and tissue through a tiny opening in the back. The goal is to create more space for the nerves, helping reduce pain and improve walking ability.
Why Is the MILD Procedure Done?
This procedure is recommended when:
- You have lumbar spinal stenosis causing back or leg pain, numbness, or heaviness.
- Walking or standing increases symptoms while sitting provides relief.
- MRI or other imaging confirms narrowing from thickened ligament.
- Conservative treatments such as physical therapy, epidural injections, or medications have not provided lasting relief.
- You want a minimally invasive option that does not involve implants, stitches, or general anesthesia.
The goal is to improve walking tolerance, decrease leg pain, and restore mobility.
How the Procedure Works
MILD is performed in a sterile procedure suite using fluoroscopy (live X-ray) to guide the instruments.
Step-by-step overview
- Positioning
You will lie face down on the procedure table. - Skin Numbing
A small amount of local anesthetic is used to numb the skin and deeper tissues. - Tiny Incision
A very small (about the size of a baby aspirin) incision is made in the lower back. - Fluoroscopy-Guided Access
A specialized device is inserted through the tiny opening and guided to the thickened ligament. - Removal of Excess Tissue
Small pieces of the overgrown ligament (ligamentum flavum) are carefully removed.
This enlarges the spinal canal and allows more room for the nerves. - Completion
The device is removed, no stitches are usually needed, and a bandage is applied.
Total procedure time is usually 20–30 minutes.
After the Procedure
What to expect:
- Mild soreness at the incision site for a few days is normal.
- Walking is encouraged immediately.
- You may resume light activity as tolerated.
- Avoid heavy lifting or strenuous activity for a few days unless told otherwise.
- Improvement may continue gradually over several weeks as inflammation decreases.
You will receive follow-up instructions from the care team, and you may have scheduled check-in calls or clinic visits.
Potential Risks and Side Effects
The MILD procedure is considered safe and minimally invasive, with a low risk of complications.
Possible but uncommon risks include:
- Temporary soreness at the incision site
- Bleeding
- Infection
- Increased pain or no improvement
- Rare nerve irritation
- Allergic reaction to contrast dye
- Technical limitations preventing completion of the procedure
Your provider will review any additional risks based on your health history.
Key Takeaway
The MILD procedure is a nonsurgical, minimally invasive option for patients with lumbar spinal stenosis caused by thickened ligament. It helps by removing small amounts of tissue to create more room for the spinal nerves—often improving walking ability, leg pain, and overall quality of life without the need for traditional surgery.
