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    • Disc Prosthesis
    • Lars Gunnar Johnsen
    • Lars Gunnar Johnsen: Influence Statistics

      Lars Gunnar Johnsen

      Lars Gunnar Johnsen

      Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, Trondheim, Norway | Department of Orthopaedic Surgery, St. Olav’s University ...

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      Lars Gunnar Johnsen:Expert Impact

      Concepts for whichLars Gunnar Johnsenhas direct influence:Disc prosthesis,Hip fracture,Disc replacement,Comprehensive geriatric,Hip fracture patients,Disc height,Multidisciplinary rehabilitation,Degenerative disc.

      Lars Gunnar Johnsen:KOL impact

      Concepts related to the work of other authors for whichfor which Lars Gunnar Johnsen has influence:Hip fracture,Lumbar spinal stenosis,Elderly patients,Low pain,Spine surgery,Multidisciplinary rehabilitation,Comprehensive geriatric.

      KOL Resume for Lars Gunnar Johnsen

      Year
      2022

      Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, Trondheim, Norway

      2021

      Department of Orthopaedic Surgery, St. Olav’s University Hospital, Trondheim, Norway

      2020

      Department of Orthopaedic Surgery, Trondheim University Hospital, Trondheim, Norway.

      2019

      Orthopedic Trauma Unit, Department of Orthopedic Surgery, St. Olavs University Hospital, Trondheim, Norway.

      2018

      Department of Orthopaedic Surgery, St Olav’s Hospital, Trondheim, Norway;; ; Norwegian University of Science and Technology, Department of Neuromedicine, Trondheim, Norway

      2017

      Department of Neuromedicine, Faculty of Medicine, Norwegian University of Science and Technology, Høgskoleringen 1, 7491 Trondheim, Norway

      2016

      Department of Orthopaedic Surgery, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway

      2015

      Department of Neuroscience, Norwegian University of Science and Technology, Trondheim, Norway, National Advisory Unit on Spinal Surgery, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway, Department of Orthopedic Surgery, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway

      2014

      Department of Orthopedic Surgery, St. Olav’s University Hospital, Trondheim, Norway

      2013

      Department Of Neuromedicine, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway

      National Centre for Spinal Disorders, University Hospital of St. Olav, Trondheim

      2012

      Orthopaedic Department, Trondheim University Hospital, Trondheim, Norway

      2011

      National Centre for Diseases of the Spine, University Hospital of Trondheim, 7030 Trondheim

      2004

      From the *Department of Orthopaedic Surgery, Trondheim University Hospital, Trondheim, the †Department of Surgery, Levanger Hospital, Levanger, and the ‡Department of Surgery, Orkdal Sanitetsforenings Hospital, Orkanger, Norway.

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      Sample of concepts for which Lars Gunnar Johnsen is among the top experts in the world.
      Concept World rank
      costshifts #3
      hip fracture standardised #3
      total specialist costs #3
      hospitals´ discharge tendency #3
      retrospective studies eur #3
      hospitals discharge tendency #3
      conventional standardised #3
      discharges organizational #3
      59971 norwegian patients #3
      fasttrack mortality #3
      hospital discharge tendency #3
      standardised retrospective #3
      discharge tendency #3
      eur 78 #3
      models 365 #3
      standardised conventional hospital #3
      acute conditions day #3
      life eur #3
      standardised total costs #3
      ratio ov055625700 #4
      rated modic #4
      proportion hospital capacity #4
      candidates disc #4
      l4 l5 facet #4
      surgery 60day mortality #4
      arthropathy posterior #4
      cost ov055625700 #4
      hospital surgical capacity #4
      discharge organizational #4
      arthropathy l5 #4
      localised mri #4
      proportion trochanteric fractures #4
      60072 patients #4
      s1 radiologists #4
      facet posterior hiz #4
      arthropathy l3 #4
      mri findings candidates #4
      l5 s1 modic #4
      surgical admissions surgery #4
      strained surgical resources #4
      findings l3 l4 #4
      midway interim analysis #4
      candidates disc prosthesis #4
      ov055625700 #4
      reliability mri findings #4
      l3 l4 facet #4
      ov055625700 incremental #4
      readmission conventional #4
      l4 l5 prevalence #4
      subjective disc #4
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      Prominent publications by Lars Gunnar Johnsen

      KOL-Index: 13676

      OBJECTIVE: To compare the efficacy of surgery with disc prosthesis versus non-surgical treatment for patients with chronic low back pain.

      DESIGN: A prospective randomised multicentre study.

      SETTING: Five university hospitals in Norway.

      PARTICIPANTS: 173 patients with a history of low back pain for at least one year, Oswestry disability index of at least 30 points, and degenerative changes in one or two lower lumbar spine levels (86 patients randomised to surgery). Patients were treated ...

      Known for Disc Prosthesis | Low Pain | Surgery Patients | Oswestry Disability | Prolo Scale
      KOL-Index: 12455

      BACKGROUND: Most patients with hip fractures are characterised by older age (>70 years), frailty, and functional deterioration, and their long-term outcomes are poor with increased costs. We compared the effectiveness and cost-effectiveness of giving these patients comprehensive geriatric care in a dedicated geriatric ward versus the usual orthopaedic care.

      METHODS: We did a prospective, single-centre, randomised, parallel-group, controlled trial. Between April 18, 2008, and Dec 30, ...

      Known for Comprehensive Geriatric | Hip Fractures | Controlled Trial | 4 Months | 70 Years
      KOL-Index: 11414

      BACKGROUND: The need for cost effectiveness analyses in randomized controlled trials that compare treatment options is increasing. The selection of the optimal utility measure is important, and a central question is whether the two most commonly used indexes - the EuroQuol 5D (EQ5D) and the Short Form 6D (SF6D) - can be used interchangeably. The aim of the present study was to compare change scores of the EQ5D and SF6D utility indexes in terms of some important measurement properties. ...

      Known for Oswestry Disability | Eq5d Sf6d | Chronic Low | Degenerative Disc Disease | Psychometric Properties
      KOL-Index: 9650

      STUDY DESIGN: Prospective randomized controlled multicenter study.

      OBJECTIVE: To compare the effect of X-Stop with minimally invasive decompression (MID) in patients with neurogenic intermittent claudication due to lumbar spinal stenosis.

      SUMMARY OF BACKGROUND DATA: Lumbar spinal stenosis is the most common indication for operative treatment in elderly. Laminectomy has been the "gold standard," but MID is now widely used. Another minimally invasive surgery option is X-Stop showing good ...

      Known for Lumbar Spinal Stenosis | Minimally Invasive | Complication Rate | Decompression Surgical | Nonoperative Treatment
      KOL-Index: 9173

      BACKGROUND AND PURPOSE: A successful outcome after lumbar discectomy indicates a substantial improvement. To use the cutoffs for minimal clinically important difference (MCID) as success criteria has a large potential bias, simply because it is difficult to classify patients who report that they are "moderately improved". We propose that the criteria for success should be defined by those who report that they are "completely recovered" or "much better".

      METHODS: A cohort of 692 patients ...

      Known for Lumbar Disc | Leg Pain | Cutoffs Success | Spine Surgery | Norwegian Registry
      KOL-Index: 8744

      STUDY DESIGN: Randomized clinical trial with 2-year follow-up.

      OBJECTIVE: To compare the cost-effectiveness of X-stop to minimally invasive decompression in patients with symptomatic lumbar spinal stenosis.

      SUMMARY OF BACKGROUND DATA: Lumbar spinal stenosis is the most common indication for operative treatment in elderly. Although surgery is more costly than nonoperative treatment, health outcomes for more than 2 years were shown to be significantly better. Surgical treatment with ...

      Known for Lumbar Spinal Stenosis | Minimally Invasive Decompression | Surgical Treatment | 2 Years | Reoperation Spinal
      KOL-Index: 8728

      BackgroundThe Neck Disability Index (NDI) is widely used as a self-rated disability score in patients with cervical radiculopathy. The purpose of this study was to evaluate whether the NDI score correlated with other assessments of quality of life and mental health in a specific group of patients with single-level cervical disc disease and corresponding radiculopathy.MethodsOne hundred thirty-six patients were included in a prospective, randomized controlled clinical multicenter study on ...

      Known for Mental Health | Neck Disability | Level Cervical | Quality Life | Intervertebral Disc
      KOL-Index: 8628

      INTRODUCTION: Limited reliability data exist for localised magnetic resonance imaging (MRI) findings relevant to planning of treatment with lumbar disc prosthesis and later outcomes. We assessed the reliability of such findings in chronic low back pain patients who were accepted candidates for disc prosthesis.

      METHODS: On pretreatment MRI of 170 patients (mean age 41 years; 88 women), three experienced radiologists independently rated Modic changes, disc findings and facet arthropathy at ...

      Known for Disc Prosthesis | Mri Findings | L4 L5 | Facet Arthropathy | Resonance Imaging
      KOL-Index: 8527

      PurposeHeterotopic ossification is a phenomenon in cervical arthroplasty. Previous reports have mainly focused on various semiconstrained devices and only a few publications have focused on ossification around devices that are nonconstrained. The purpose of this study was to assess the occurrence of heterotopic ossification around a nonconstrained cervical device and how it affects clinical outcome 2 years after surgery.MethodsThirty-seven patients were included from a larger cohort of a ...

      Known for Heterotopic Ossification | Cervical Arthroplasty | Grade Patients | 2 Years | Neck Disability
      KOL-Index: 8089

      OBJECTIVE: To compare the efficacies of two pathways-conventional and fast-track care-in patients with hip fracture.

      DESIGN: Retrospective single-centre study.

      SETTING: University hospital in middle Norway.

      PARTICIPANTS: 1820 patients aged ≥65 years with hip fracture (intracapsular, intertrochanteric or subtrochanteric).

      INTERVENTIONS: 788 patients were treated according to conventional care from April 2008 to September 2011, and 1032 patients were treated according to fast-track care ...

      Known for Hip Fracture | Fast Track | Surgery Patients | Stay Time | Comparing Conventional
      KOL-Index: 8021

      PurposeStandard surgical treatment for symptomatic cervical disc disease has been discectomy and fusion, but the use of arthroplasty, designed to preserve motion, has increased, and most studies report clinical outcome in its favor. Few of these trials, however, blinded the patients. We, therefore, conducted the Norwegian Cervical Arthroplasty Trial, and present 2-year clinical outcome after arthroplasty or fusion.MethodsThis multicenter trial included 136 patients with single-level ...

      Known for Arthroplasty Fusion | Level Cervical | Year Follow | Surgical Treatment | Disc Disease
      KOL-Index: 7964

      ObjectiveTo examine whether combined magnetic resonance imaging (MRI) findings are related to the degree of disability and low back pain (LBP) in candidates for lumbar disc prosthesis surgery.Materials and methodsThis cross-sectional study included 170 disc prosthesis candidates (mean age 41 years; 88 women) with chronic non-radicular LBP and localized disc degeneration. Experienced radiologists rated Modic changes and disc findings at L4-S1 on pre-treatment MRIs. An MRI total score ...

      Known for Mri Findings | Lumbar Disc | L5 S1 | Pain Lbp | Modic Type
      KOL-Index: 7953

      BACKGROUND CONTEXT: Lumbar total disc replacement (TDR) is a treatment option for selected patients with chronic low back pain (LBP) that is non-responsive to conservative treatment. The long-term results of disc replacement compared with multidisciplinary rehabilitation (MDR) have not been reported previously.

      PURPOSE: We aimed to assess the long-term relative efficacy of lumbar TDR compared with MDR.

      DESIGN: We undertook a multicenter randomized controlled trial at five university ...

      Known for Disc Replacement | 8year Followup | Chronic Low | Randomized Controlled | Lumbar Total
      KOL-Index: 7889

      Studies in the 1980s, including one from central Norway, in most cases showed that the incidence of hip fractures was increasing. In the 1990s, however, studies from Sweden and the United States indicated that the increase may have stopped. We report the current incidence of hip fractures in subjects in central Norway and compare it with that previously reported. The number of cervical and trochanteric fractures in a defined region of Central Norway in 1992 to 1993 and in 1997 to 1998 ...

      Known for Hip Fracture Incidence | Trochanteric Fractures | Rural Areas | Aged Norway | Urban Population
      KOL-Index: 7604

      Background and purpose - There are numerous studies on the weekend effect for hip fracture patients, with conflicting results. We analyzed time of admission and discharge, and the association with mortality and length of hospital stay in more detail. Patients and methods - We used data from 61,211 surgically treated hip fractures in 55,211 patients, admitted to Norwegian hospitals 2008-2014. All patients were aged 50 years or older. Data were analyzed with Cox and Poisson regression. ...

      Known for Hip Fracture | Hospital Mortality | Patients Admitted | Day Admission | Hazard Ratio

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      Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, Trondheim, Norway | Department of Orthopaedic Surgery, St. Olav’s University Hospital, Trondheim, Norway | Norwegian National Advisory Unit on Trauma, D

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