Outcomes of Epiduroscopy Using Less Than 50 ml of Normal Saline in Low Back and Lower Extremity Pain Patients / 대한마취과학회지

ABSTRACT

BACKGROUND: Epidural adhesion can cause pain from compression and irritation of nerves. But a simple injection into the lumbar epidural space usually goes into the area of least resistance and cannot deliver the medication to the target area. Thus, the adhesiolysis of the affected area is sometimes mandatory. We performed an adhesiolysis, irrigating with normal saline, and targeted an injection of a local anesthetic and steroid mixture to the epidural space, using a flexible catheter-secured epiduroscopic unit in 15 patients with low back pain, and assessed the pain score changes. METHODS: With the patient in the prone position, the epidural space was entered with a 17-gauge Tuohy needle. A guide-wire was inserted through the needle and advanced under fluoroscopic guidance to the level of the suspected pathology. A catheter was then advanced over the guide-wire. After the removal of the guide-wire, an adapter was then attached to the proximal end of the catheter, and its side arm was connected to a syringe containing normal saline flush. The 0.9 mm diameter fiberoptic scope was introduced into the catheter via the adaptor, and a video camera was then attached. Gentle irrigation of normal saline less than 50 ml distended the epidural space. The catheter and fiberoptic scope were advanced to the adhesion area and adhesiolysis was done by moving the tip of the steering catheter. Assuming that original NRS (Numeric Rating Scale) before the procedure was 10, we asked the NRS at 1, 4, 8, 12, 16 weeks after the epiduroscope. RESULTS: NRS at 1, 4, 8, 12, 16 weeks after the epiduroscope showed significant decrease of both low back pain and radiating pain, compared with the original pain (P<0.05). CONCLUSIONS: The flexible catheter-secured epiduroscopic unit proved to be painless, safe, and more simple, than an operation, it is, thus, a practical method for pain relief using adhesiolysis and irrigation of epidural space under the direct visualization of the epidural space in patients with low back and lower extremity pain.