Journal List > J Korean Soc Spine Surg > v.21(1) > 1076048

J Korean Soc Spine Surg. 2014 Mar;21(1):8-14. Korean.
Published online March 31, 2014.
© Copyright 2014 Korean Society of Spine Surgery
Management of Patients with L2 Spinal Nerve Root Block Who Are Suffering from Low Back and Referred Pain
Dong Ki Ahn, M.D., Song Lee, M.D., Tae Woo Kim, M.D., Sung Won Hong, M.D. and Woo Sik Jung, M.D.
Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea.

Corresponding author: Dong Ki Ahn, M.D. Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital 40-12 Chungryangni-dong, Dongdaemun-gu, Seoul 130-010, Korea. TEL: 82-2-966-1616, FAX: 82-2-968-2394, Email:
Received July 05, 2013; Revised July 10, 2013; Accepted November 28, 2013.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Study Design

Prospective clinical study.


The aim of the study was to verify the effectiveness of L2 spinal nerve root block for patients who are suffering from low back pain and referred pain with compound causes.

Summary of Literature Review

Most of low back pain and referred pain arises from discs, facet joints and sacroiliac joints. All structures above have the pain perception pathway through sympathetic nerves with a connection to L2 spinal nerves.

Materials and Methods

We selected patients with low back pain and referred pain for more than 2 weeks. Each 50 patients were randomly allocated to an experimental and a control group.The experimental group underwent a L2 spinal nerve root block with 2cc of 0.25% bupibacaine at the symptom dominant side. The control group underwent a skin infiltration with 2cc of 2% lidocaine only. The pain was assessed with a visual analogue scale (VAS) consisting of 100 points at 5minutes, day 1, day 3, day 5, day 7 and day 30 postprocedure.


Both groups showed a significant improvement after the procedures(p=0.000). However, a greater improvement was shown in the experimental group(p=0.000). In the individual analysis, the experimental group had improved as time elapsed and the significancewas maintained until 30 days. However, in control group, the significance was lost at day 30.


L2 spinal nerve root block is recognized to reduce the low back and referred pains which arise from compound causes in a degenerative spinal disease.

Keywords: L2 spinal nerve root block; low back pain and referred pain; intervertebral disc; facet joint; sacroiliac joint


Fig. 1
A diagram of conspectus which shows number of initial selected cases, drop out cases final included cases.
Click for larger image

Fig. 2
A graph which shows serial clinical improvement according to the elapsed time.
Click for larger image


Table 1
Homogeneity of two groups
Click for larger image

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