Clinical EvidenceFor UBE

Advancing biportal endoscopy through structured clinical evidence and insights.

Literature
Library

Browse our complete UBE literature library — filter by topic; each study links directly to the publication.

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Featured Study

Schulthess Klinik PASS Study – EUROSPINE 2017 Full Paper Award

Clear performance gap between spine, hip and knee surgery!
A landmark study from the Schulthess Klinik (Zurich, Switzerland), winner of the EUROSPINE 2017 Full Paper Award, measured and compared a patient experience performance indicator – Patient Accepted Symptom State (PASS) – for patients undergoing lumbar spine, hip and knee surgery. Around 90% of hip patients reach an acceptable symptom state after surgery, but only around 45% of patients after lumbar spine surgery. Its findings underscore the opportunity to elevate spine outcomes and reinforce the need for continued innovation in this field.

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EUROSPINE 2017 FULL PAPER AWARD: Time to remove our rose-tinted spectacles: a candid appraisal of the relative success of surgery in over 4500 patients with degenerative disorders of the lumbar spine, hip or knee (Mannion et al., Eur Spine J 2018;27:778–788).

Schulthess PASS study: around 90% of hip patients but only around 45% of lumbar spine patients reach an acceptable symptom state

New Study · Neurospine 2026

Endoscopic fusion or MIS-TLIF?
What 106 spine surgeons say

An international structured debate, published in Neurospine 2026.
Spine surgeons from 35 countries compared endoscopic lumbar interbody fusion with minimally invasive TLIF (MIS-TLIF). Endoscopic lumbar fusion was favoured for tissue preservation (89.6%), visualization (81.1%) and faster recovery (74.5%), with comparable mid-term clinical outcomes and complication rates to MIS-TLIF.

Importantly, 78.3% of surveyed surgeons recognise endoscopic fusion as a safe and effective option for selected single-level procedures. MIS-TLIF remains more established for complex cases, while long-term fusion and revision outcomes require further evidence.

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Endoscopic Lumbar Interbody Fusion Versus Minimally Invasive Transforaminal Lumbar Interbody Fusion: A Structured Debate and International Practice Patterns (Boonsirikamchai W, Jitpakdee K, et al., on behalf of the SpineWalker Academy. Neurospine 2026;23(4):832–852).

Panel agreement among 106 spine surgeons

International survey across 35 countries, in favour of endoscopic lumbar fusion

78.3%

recognise endoscopic fusion as a safe and effective option for selected single-level procedures

  • Tissue preservation89.6%
  • Visualization81.1%
  • Faster recovery74.5%

Prespecified 70% agreement threshold

Source: Boonsirikamchai W, Jitpakdee K, et al. Neurospine 2026;23(4):832–852.

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