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Fig. 1 | Journal of Orthopaedic Surgery and Research

Fig. 1

From: Early efficacy observation of the unilateral biportal endoscopic technique in the treatment of multi-level lumbar spinal stenosis

Fig. 1

The red arrow in (A) indicates the operation channel in the decompression L4/L5 segment, and the blue arrow indicates the observation channel in this segment. When L3/L4 was decompressed, the L4/L5 observation channel (blue arrow) was cut along the dotted line and served as the operation channel. The yellow arrows show the viewing channels at decompression L3/L4. Body surface location diagram in (B), decompression is carried out from tail end to head end, red is the operation channel, blue is the observation channel. C shows the positioning map under perspective. D shows the intraoperative drawings. E shows the general incision after operation

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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X