• The association between preoperative MRI findings and clinical improvement in patients included in the NORDSTEN spinal stenosis trial 

      Aaen, Jørn Ståle; Banitalebi, Hasan; Austevoll, Ivar Magne; Hellum, Christian; Storheim, Kjersti; Myklebust, Tor Åge; Anvar, Masoud D; Weber, Clemens; Solberg, Tore; Grundnes, Oliver; Brisby, Helena; Indrekvam, Kari; Hermansen, Erland (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-05)
      <p><b>Purpose</b> To investigate potential associations between preoperative MRI findings and patient reported outcome measures (PROMs) after surgery for lumbar spinal stenosis (LSS). <p><b>Methods</b> The NORDSTEN trial included 437 patients. We investigated the association between preoperative MRI findings such as morphological grade of stenosis (Schizas grade), quantitative grade of ...
    • Clinical and MRI findings in lumbar spinal stenosis: baseline data from the NORDSTEN study 

      Aaen, Jørn; Austevoll, Ivar Magne; Hellum, Christian; Storheim, Kjersti; Myklebust, Tor Åge; Banitalebi, Hasan; Anvar, Masoud; Brox, Jens Ivar; Weber, Clemens; Solberg, Tore; Grundnes, Oliver; Brisby, Helena; Indrekvam, Kari; Hermansen, Erland (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-19)
      Purpose - The aim was to describe magnetic resonance imaging findings in patients planned for lumbar spinal stenosis surgery. Further, to describe possible associations between MRI findings and patient characteristics with patient reported disability or pain.<p> <p>Methods - The NORDSTEN spinal stenosis trial included 437 patients planned for surgical decompression of LSS. The following MRI ...
    • Comparable increases in dural sac area after three different posterior decompression techniques for lumbar spinal stenosis: radiological results from a randomized controlled trial in the NORDSTEN study 

      Hermansen, Erland; Austevoll, Ivar Magne; Hellum, Christian; Storheim, Kjersti; Myklebust, Tor Åge; Aaen, Jørn Ståle; Banitalebi, Hasan; Anvar, Masoud D; Rekeland, Frode; Brox, Jens Ivar; Franssen, Eric; Weber, Clemens; Solberg, Tore; Haug, Knut Jørgen; Grundnes, Oliver; Brisby, Helena; Indrekvam, Kari (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-18)
      <i>Purpose</i> - To investigate changes in dural sac area after three different posterior decompression techniques in patients undergoing surgery for lumbar spinal stenosis.<p><p> <i>Summary of background data</i> - Decompression of the nerve roots is the main surgical treatment for lumbar spinal stenosis. The aim of this study was to radiologically investigate three commonly used posterior ...
    • Comparable Increases in Dural Sac Area After Three Different Posterior Decompression Techniques for Lumbar Spinal Stenosis: Radiological Results From a Randomized Controlled Trial in the NORDSTEN Study 

      Hermansen, Erland; Austevoll, Ivar Magne; Hellum, Christian; Storheim, Kjersti; Myklebust, Tor Åge; Aaen, Jørn Ståle; Banitalebi, Hasan; Anvar, Masoud; Rekeland, Frode; Brox, Jens Ivar; Franssen, Eric; Weber, Clemens; Solberg, Tore; Haug, Knut Jørgen; Grundnes, Oliver; Brisby, Helena; Indrekvam, Kari (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-18)
      <i>Purpose</i> - To investigate changes in dural sac area after three different posterior decompression techniques in patients undergoing surgery for lumbar spinal stenosis.<p><p> <i>Summary of background data</i> - Decompression of the nerve roots is the main surgical treatment for lumbar spinal stenosis. The aim of this study was to radiologically investigate three commonly used posterior ...
    • Comparison of 3 Different Minimally Invasive Surgical Techniques for Lumbar Spinal Stenosis: A Randomized Clinical Trial 

      Hermansen, Erland; Austevoll, Ivar Magne; Hellum, Christian; Storheim, Kjersti; Myklebust, Tor Åge; Aaen, Jørn Ståle; Banitalebi, Hasan; Anvar, Masoud D; Rekeland, Frode; Brox, Jens Ivar; Franssen, Eric; Weber, Clemens; Solberg, Tore; Furunes, Håvard; Grundnes, Oliver; Brisby, Helena; Indrekvam, Kari (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-28)
      Importance Operations for lumbar spinal stenosis is the most often performed surgical procedure in the adult lumbar spine. This study reports the clinical outcome of the 3 most commonly used minimally invasive posterior decompression techniques.<p> <p>Objective To compare the effectiveness of 3 minimally invasive posterior decompression techniques for lumbar spinal stenosis. <p>Design, ...
    • Decompression with or without Fusion in Degenerative Lumbar Spondylolisthesis 

      Austevoll, Ivar Magne; Hermansen, Erland; Fagerland, Morten Wang; Storheim, Kjersti; Brox, Jens Ivar; Solberg, Tore; Rekeland, Frode; Franssen, Eric; Weber, Clemens; Brisby, Helena; Grundnes, Oliver; Algaard, Knut; Bøker, Tordis; Banitalebi, Hasan; Indrekvam, Kari; Hellum, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-05)
      BACKGROUND In patients with lumbar spinal stenosis and degenerative spondylolisthesis, it is uncertain whether decompression surgery alone is noninferior to decompression with instrumented fusion. METHODS We conducted an open-label, multicenter, noninferiority trial involving patients with symptomatic lumbar stenosis that had not responded to conservative management and who had single-level ...
    • Is the presence of foraminal stenosis associated with outcome in lumbar spinal stenosis patients treated with posterior microsurgical decompression 

      Aaen, Jørn Ståle; BANITALEBI, HASAN; Austevoll, Ivar Magne; Hellum, Christian; Storheim, Kjersti; Myklebust, Tor Åge; Anvar, Masoud D; Weber, Clemens; Solberg, Tore; Grundnes, Oliver; Brisby, Helena; Indrekvam, Kari; Hermansen, Erland (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-05)
      Background We aim to investigate associations between preoperative radiological findings of lumbar foraminal stenosis with clinical outcomes after posterior microsurgical decompression in patients with predominantly central lumbar spinal stenosis (LSS).<p> <p>Methods The study was an additional analysis in the NORDSTEN Spinal Stenosis Trial. In total, 230 men and 207 women (mean age 66.8 (SD ...
    • Postoperative Dural Sac Cross-Sectional Area as an Association for Outcome After Surgery for Lumbar Spinal Stenosis: Clinical and Radiological Results From the NORDSTEN-Spinal Stenosis Trial 

      Hermansen, Erland; Myklebust, Tor Åge; Weber, Clemens; Brisby, Helena; Austevoll, Ivar Magne; Hellum, Christian; Storheim, Kjersti; Aaen, Jørn Ståle; BANITALEBI, HASAN; Brox, Jens Ivar; Grundnes, Oliver; Rekeland, Frode Gurvin; Solberg, Tore; Franssen, Eric; Indrekvam, Kari (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-15)
      Objective - The aim was to investigate the association between postoperative dural sac cross-sectional area (DSCA) after decompressive surgery for lumbar spinal stenosis and clinical outcome. Furthermore, to investigate if there is a minimum threshold for how extensive a posterior decompression needs to be to achieve a satisfactory clinical result.<p> <p>Summary of Background Data - There is ...
    • Surgery in Degenerative Spondylolisthesis: Does fusion improve outcome in subgroups? A secondary analysis from a randomized trial (NORDSTEN trial) 

      Hellum, Christian; Rekeland, Frode Gurvin; Småstuen, Milada Cvancarova; Solberg, Tore; Hermansen, Erland; Storheim, Kjersti; Brox, Jens Ivar; Furunes, Håvard; Franssen, Eric; Weber, Clemens; Brisby, Helena; Grundnes, Oliver; Robert Hector Algaard, Knut; Bøker, Tordis; Banitalebi, Hasan; Indrekvam, Kari; Austevoll, Ivar Magne (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-22)
      BACKGROUND CONTEXT: Patients with spinal stenosis and degenerative spondylolisthesis are treated surgically with decompression alone or decompression with fusion. However, there is debate regarding which subgroups of patients may benefit from additional fusion. PURPOSE: To investigate possible treatment effect modifiers and prognostic variables among patients operated for spinal stenosis and ...