In this procedure, the surgery is performed through a tube which is placed in between the muscles of the lower back, thereby minimizing damage to the muscles and promoting a faster recovery. This is usually indicated for patients with a ruptured disc or spinal stenosis, where bone spurs are pinching the nerves in the lower back. Symptoms usually include back pain with radiation to the legs. The procedure can be performed with or without a fusion. Surgery can be done on an outpatient basis, where patients go home a few hours following the procedure. Alternatively, a 1 night hospital stay is optional.