• Dural Sac
    • Gerit Kulik
    • Gerit Kulik: Influence Statistics

      Gerit Kulik

      Gerit Kulik

      Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland | Urology Department, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland | Orthopaedic Department, ...

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      Gerit Kulik:Expert Impact

      Concepts for whichGerit Kulikhas direct influence:Dural sac,Lumbar spinal stenosis,Interspinous distraction,Key interventions,Spinal stenosis,Decompressive surgery,Morphological grade,Slice orientation.

      Gerit Kulik:KOL impact

      Concepts related to the work of other authors for whichfor which Gerit Kulik has influence:Lumbar spinal stenosis,Contact angle,Spine surgery,Surface tension,Patients lss,Spinal canal,Pedicle screw.

      KOL Resume for Gerit Kulik


      Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland


      Urology Department, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland


      Orthopaedic Department, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne, Lausanne, Switzerland.


      Department of Orthopedics, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Avenue Pierre-Decker 4, Lausanne, Switzerland


      Orthopedic Department, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne, 1011, Lausanne, Switzerland


      Centre Hospitalier Universitaire Vaudois, The University of Lausanne, Lausanne, Switzerland


      Centre Hospitalier Universitaire Vaudois, Hôpital Orthopédique, CHUV-University of Lausanne, Av P. Decker 4, Lausanne 1011, Switzerland.


      Site Hôpital Orthopédique, Centre Hospitalier Universitaire Vaudois (CHUV), University of Lausanne, Avenue Pierre-Decker 4, 1011, Lausanne, Switzerland


      From the Departments of *Orthopedics and †Radiology, Centre Hospitalier Universitaire Vaudois (CHUV), University of Lausanne, Lausanne, Switzerland; ‡NHS Grampian, Orthopaedic Unit, Woodend Hospital, Aberdeen, Untied Kingdom; and §Centre for Spinal Research, Positional MRI Centre, Woodend Hospital, Aberdeen, United Kingdom.


      Laboratoire de Métallurgie Chimique, Institut des Matériaux, Laboratoire de Transfert de Chaleur et de Masse, Institut des Sciences de l'Énergie, and Laboratoire d'Optique Appliquée, Institute d'Imagerie et d'Optique Appliquée, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland, and Nanotribology Laboratory for Information Storage and Micro-/Nano-electromechanical Systems, Ohio State University, 650 Ackerman Road, Suite 255, Columbus, Ohio 43202

      Nanostructuring Research Group, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland


      Advanced Photonics Laboratory, School of Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

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      Sample of concepts for which Gerit Kulik is among the top experts in the world.
      Concept World rank
      morphological grades levels #2
      8 mm decompression #2
      interspinous distraction lss #2
      distraction incremental #2
      decompression single level #2
      decompression incremental distraction #2
      levels morphological grades #2
      implants reproducibility severity #2
      larger lumbar canals #3
      tcmeps surgical decompression #3
      asymmetrical disc degeneration #3
      severe radicular symptoms #3
      early followup r036 #3
      bony canal level #3
      human stature evolution #3
      severe extreme stenosis #3
      larger pedicle height #3
      relation decompression #3
      twentyfour patients lss #3
      surgery dsca #3
      distraction decompression #3
      l1 l4 level #3
      dimensions bony canal #3
      patient sample66 patients #3
      secular spinal #3
      secular lumbar #3
      tcmep zcq #3
      l4 level surgical #3
      neurophysiological predict #3
      dsca morphology #3
      vh foraminal stenosis #3
      operative tcmep #3
      morphological grade surgery #3
      dural sac survey #3
      european spine societies #3
      142 responding physicians #3
      surgery morphological grade #3
      dsca dura mater #3
      zcq early #3
      dsca morphological #3
      neurophysiological decompression #3
      mater europe #3
      tcmep improvement #3
      dsca values #3
      decompressive surgery tcmeps #3
      improvement decompressive #4
      presence positive seds #4
      symptomatic lss patients #4
      grade morphology seds #4
      seds judged #4
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      Prominent publications by Gerit Kulik

      KOL-Index: 12397

      STUDY DESIGN: Retrospective radiologic study on a prospective patient cohort.

      OBJECTIVE: To devise a qualitative grading of lumbar spinal stenosis (LSS), study its reliability and clinical relevance.

      SUMMARY OF BACKGROUND DATA: Radiologic stenosis is assessed commonly by measuring dural sac cross-sectional area (DSCA). Great variation is observed though in surfaces recorded between symptomatic and asymptomatic individuals.

      METHODS: We describe a 7-grade classification based on the ...

      Known for Dural Sac | Qualitative Grading | Magnetic Resonance Images | Spinal Stenosis | Oswestry Disability
      KOL-Index: 7615

      IntroductionLumbar spinal stenosis (LSS) treatment is based primarily on the clinical criteria providing that imaging confirms radiological stenosis. The radiological measurement more commonly used is the dural sac cross-sectional area (DSCA). It has been recently shown that grading stenosis based on the morphology of the dural sac as seen on axial T2 MRI images, better reflects severity of stenosis than DSCA and is of prognostic value. This radiological prospective study investigates ...

      Known for Spinal Stenosis | Morphological Grading | Resonance Imaging | Dural Sac | Varying Degrees
      KOL-Index: 7339

      Surgical decision-making in lumbar spinal stenosis involves assessment of clinical parameters and the severity of the radiological stenosis. We suspected that surgeons based surgical decisions more on dural sac cross-sectional area (DSCA) than on the morphology of the dural sac. We carried out a survey among members of three European spine societies. The axial T2-weighted MR images from ten patients with varying degrees of DSCA and morphological grades according to the recently described ...

      Known for Lumbar Spinal Stenosis | Dural Sac | Morphological Grade | Surgical Decision | Vertebrae Magnetic
      KOL-Index: 6754

      We present a new method based on B-spline snakes (active contours) for measuring high-accuracy contact angles. In this approach, we avoid making physical assumptions by defining the contour of the drop as a versatile B-spline curve. When useful, we extend this curve by mirror symmetry so that we can take advantage of the reflection of the drop onto the substrate to detect the position of the contact points. To keep a wide range of applicability, we refrain from discretizing the contour ...

      Known for Contact Points | Accurate Determination | Drop Contour | Advanced Imageenergy Term | Mirror Symmetry
      KOL-Index: 6569

      PurposeNeurophysiological monitoring aims to improve the safety of pedicle screw placement, but few quantitative studies assess specificity and sensitivity. In this study, screw placement within the pedicle is measured (post-op CT scan, horizontal and vertical distance from the screw edge to the surface of the pedicle) and correlated with intraoperative neurophysiological stimulation thresholds.MethodsA single surgeon placed 68 thoracic and 136 lumbar screws in 30 consecutive patients ...

      Known for Pedicle Screw | Stimulation Threshold | Specificity Sensitivity | Neurophysiological Monitoring | Lumbar Vertebrae
      KOL-Index: 6144

      The surface properties of aluminum, such as chemical composition, roughness, friction, adhesion, and wear, can play an important role in the performance of micro-/nano-electromechanical systems, e.g., digital micromirror devices. Aluminum substrates chemically reacted with octadecylphosphonic acid (ODP/Al), decylphosphonic acid (DP/Al), and octylphosphonic acid (OP/Al) have been investigated and characterized by X-ray photoelectron spectroscopy (XPS), contact angle measurements, and ...

      Known for Phosphonic Acid | Aluminum Oxide | Chemical Composition | Pure Water | Surface Energy
      KOL-Index: 4471

      Recent investigations have revealed the profound influence of stiction/adhesion, friction and wear on the reliability of micro/nanoelectromechanical systems (MEMS/NEMS). Studies have shown that the so-called self-assembled monolayers (SAMs) can be potential anti-stiction lubricants for MEMS/NEMS. Understanding the molecular tribological mechanisms of SAMs is a key to successfully designing and preparing super lubricants for MEMS/NEMS. For this purpose, perfluoroalkylsilane and ...

      Known for Mems Nems | Assembled Monolayers | Tribological Properties | Surface Roughness | Silica Substrates
      KOL-Index: 4332

      PurposeWe aimed to study the relationship between two morphological parameters recently described on MRI images in relation to lumbar spinal stenosis (LSS): the first is the sedimentation sign (SedS) and the second is the morphological grading of lumbar stenosis.Materials and methodsMRIs from a total of 137 patients were studied. From those, 110 were issued from a prospective database of symptomatic LSS patients, of whom 73 were treated surgically and 37 conservatively based on symptom ...

      Known for Sedimentation Sign | Spinal Stenosis | Symptomatic Lss | Morphological Grading | Humans Lumbar
      KOL-Index: 3704

      Chronic low back pain attributed to lumbar disc degeneration poses a serious challenge to physicians. Surgery may be indicated in selected cases following failure of appropriate conservative treatment. For decades, the only surgical option has been spinal fusion, but its results have been inconsistent. Some prospective trials show superiority over usual conservative measures while others fail to demonstrate its advantages. In an effort to improve results of fusion and to decrease the ...

      Known for Disc Degeneration | Spinal Fusion | Interspinous Devices | Nucleus Replacement | Low Pain
      KOL-Index: 3471

      In micro∕nanoelectromechanical systems (MEMS∕NEMS), surface-dominated forces, such as stiction∕adhesion and friction, play an important role because of the large surface-area-to-volume ratio. In order to control these forces and wear properties, optimal lubricant systems have been extensively investigated. Perfluoroalkyl self-assembled monolayers (SAMs) are considered to be a strong candidate since the fluorinated carbon backbones are expected to show lower adhesion and friction. In this ...

      Known for Surface Energy | Perfluoroalkylsilane Sams | Proper Lubricants | Lower Adhesion | Atomic Force Microscope
      KOL-Index: 3414

      Background: To analyse the relation between immediate intraoperative neurophysiological changes during decompression and clinical outcome in a series of patients with lumbar spinal stenosis (LSS) undergoing surgery.

      Methods: Twenty-four patients with neurogenic intermittent claudication (NIC) due to LSS undergoing decompressive surgery were prospectively studied. Intra operative trans-cranial motor evoked potentials (tcMEPs) were recorded before and immediately after surgical ...

      Known for Decompressive Surgery | Functional Outcome | Lumbar Spinal Stenosis | Motor Evoked
      KOL-Index: 3105

      STUDY DESIGN: Prospective neurophysiological study.

      OBJECTIVE: To identify and quantify the neurophysiological effects of interspinous distraction during spine surgery for lumbar spinal stenosis (LSS).

      SUMMARY OF BACKGROUND DATA: Interspinous devices have been introduced as an alternative treatment of LSS in selected patients aiming at obtaining indirect decompression. Nevertheless, there is no data on the immediate neurophysiological effect of distraction.

      METHODS: Thirty patients with ...

      Known for Lumbar Spinal Stenosis | Interspinous Distraction | Patients Lss | Decompression Surgical | Vertebrae Male
      KOL-Index: 3025

      IntroductionSymptomatic foraminal stenosis has been observed in patients with degenerative disc disease, scoliosis, asymmetrical disc degeneration and spondylolisthesis. Nevertheless not all patients with the above pathologies will develop symptomatic foraminal stenosis. We hypothesised that symptomatic patients have anatomical predisposition to foraminal stenosis, namely a larger pedicle height (PH) to vertebral body height (VH) ratio, leaving less room below the pedicle for the exiting ...

      Known for Foraminal Stenosis | Low Pain | Disc Degeneration | Lumbar Vertebrae | Spinal Fusion
      KOL-Index: 1992

      STUDY DESIGN: Computed tomography-based anatomical study.

      OBJECTIVE: To study the secular changes in lumbar spinal canal dimensions.

      SUMMARY OF BACKGROUND DATA: Development of symptomatic lumbar spinal stenosis, among other factors, is related to the dimensions of the bony canal. The canal reaches its adult size early on in life. Several factors, including protein intake, may influence its final dimensions. As with increases in human stature from improvements of socioeconomic conditions, ...

      Known for Spinal Canal | Larger Lumbar | Sectional Area

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      Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland | Urology Department, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland | Orthopaedic Department, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne

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