腰椎椎間板ヘルニアに対する内視鏡下椎間板摘出術は次期ゴールドスタンダードとなるか?顕微鏡のその先へ
Borriwat Santipas1,2,3, Jin Sung Kim2, Korawish Mekariya1
1Department of Orthopedic Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Neurospine
|February 10, 2026
まとめ
内視鏡下椎間板摘出術(ED)は、顕微鏡下椎間板摘出術(MD)と比較して、腰椎椎間板ヘルニアの入院期間短縮と短期的な疼痛緩和に優れている。しかし、経椎間孔的内視鏡下腰椎椎間板摘出術(TELD)の高い再発率は、その優位性を限定的にしている。
科学分野:
- 脳神経外科、低侵襲脊椎手術、エビデンスに基づく医療
背景:
- 顕微鏡下椎間板摘出術(MD)は、腰椎椎間板ヘルニアの確立された標準治療である。内視鏡下椎間板摘出術(ED)の手技が代替法として登場している。臨床的意思決定には、比較有効性データが不可欠である。
研究 の 目的:
- 腰椎椎間板ヘルニアに対する内視鏡下椎間板摘出術(ED)と顕微鏡下椎間板摘出術(MD)を系統的に比較する。患者報告アウトカム、周術期パラメータ、合併症を評価する。EDがMDに代わるゴールドスタンダードとなり得るかを判断する。
主な方法:
- PRISMAガイドラインに従った系統的レビューおよびメタアナリシス。ランダム化比較試験(RCT)および前向きコホート研究(2000年1月~2025年6月)を対象に、主要データベース(PubMed、Embase、Scopus、Web of Science)を検索した。ODI、VAS、手術時間、入院期間、合併症、再発を含むアウトカムを分析し、EDのサブタイプ(TELD、IELD、UBE)別にサブグループ分析を行った。
主要な成果:
- 17件の研究(n=3,115)が対象となった。EDは入院期間を大幅に短縮し(-2.43日)、短期的なODIを改善した。EDとMDの間で、手術時間や長期的なVAS/ODIスコアに有意な差はなかった。EDは創傷合併症が少なかったが、TELDは再発リスクが高かった(OR約2.0)。高い異質性と、2年以上の長期データが限定的であることが観察された。
結論:
- 内視鏡下椎間板摘出術は、周術期の利点と顕微鏡下椎間板摘出術と同等の有効性を提供する。経椎間孔的内視鏡下腰椎椎間板摘出術(TELD)の高い再発リスクにより、EDはMDを凌駕するには至らない。経椎間孔内視鏡下腰椎椎間板摘出術(IELD)およびユニラテラルバイポータル内視鏡(UBE)は有望であるが、MDは依然としてベンチマークである。長期的なRCTが必要である。
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