Minimal Invasive Surgery Versus Interlaminar Decompression in Lumbar Canal Stenosis

Minimally Invasive Surgery Versus Conventional Open Interlaminar Decompression in Treatment of Degenerative Lumbar Canal Stenosis

Conventional open surgery has been shown to be an effective procedure for LCS decompression. Minimally invasive surgery (MIS) through tubular retractors is a recently introduced alternative procedure for decompression of LCS. The current study aims at evaluating the efficacy of minimally invasive surgery as a decompressive procedure in comparison to conventional open surgery for the treatment of patients with LCS.

Lumbar canal stenosis (LCS) is defined as narrowing of the spinal canal, the vertebral foramina, and/or the lateral recesses, causing compression on the nearby neurologic structures. Degenerative LCS is one of the most common reasons for old patients to undergo spinal surgery. Neurogenic claudication is the most common symptom for LCS patients. The patients complain of pain or discomfort that radiates to the buttock, thigh and lower limb after walking for a certain distance, therefore leading to functional disability and decreased walking capacity. Conservative management is the first line of treatment in the absence of progressive neurologic deficit or intractable pain, consisting of physical therapy, medications (analgesics, steroids) and pain management procedures. Surgical intervention is recommended if the symptoms are persistent or worsening. Various techniques are currently used for direct decompression of LCS. Conventional open surgery involves laminectomy that has been shown to be an effective procedure for LCS decompression. However, wide laminectomies disturbs the stability of bony and ligamentous structures and may exacerbate preexisting spondylolisthesis. Minimally invasive surgery (MIS) through tubular retractors is a recently introduced alternative procedure for decompression of LCS. This technique avoids detachment of the paraspinal muscles and may promote preservation of stabilizing ligamentous and bony spinal structures. The current study aims at evaluating the efficacy of minimally invasive surgery as a decompressive procedure in comparison to conventional open surgery for the treatment of patients with LCS.

using (tubular dilators, surgical microscope, and/ or endoscope). the other group will be operated by conventional inter laminar decompression.

Change of Oswestry disability index (ODI) is being assessed to compare the pre and post operative values. This outcome measure is designed to assess function in activities of daily living for those with acute or chronic back pain. The ODI consists of 10 patient-completed questions in which the response options are presented as 6-point Likert scales. Scores range from 0% (no disability) to 100% (most severe disability).

Change of ODI is being assessed immediate pre operatively, after 3, 6,and 12 months post operatively.

Change of visual analogue scale (VAS) is being assessed to compare the pre and post operative values. VAS is a continuous scale comprised of a horizontal line, usually 10 centimeters in length. For pain intensity, "no pain" (score of 0) or "worst imaginable pain" (score of 10).

using visual analogue scale change of the values is being assessed immediate pre operatively, after 3, 6,and 12 months post operatively.

Inclusion Criteria: all patient with lumbar canal stenosis From 18_70 years old Exclusion Criteria: instability Infection Tumours of vertebrae