Blar i Bergen Open Research Archive på forfatter "Schrama, Johannes Cornelis"
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Bacterial Findings in Infected Hip Joint Replacements in Patients with Rheumatoid Arthritis and Osteoarthritis: A Study of 318 Revisions for Infection Reported to the Norwegian Arthroplasty Register
Schrama, Johannes Cornelis; Lutro, Olav; Langvatn, Håkon; Hallan, Geir; Espehaug, Birgitte; Sjursen, Haakon; Engesæter, Lars B.; Fevang, Bjørg Tilde Svanes (Peer reviewed; Journal article, 2012)High rates of Staphylococcus aureus are reported in prosthetic joint infection (PJI) in rheumatoid arthritis (RA). RA patients are considered to have a high risk of infection with bacteria of potentially oral or dental ... -
Increased risk of revision for infection in rheumatoid arthritis patients with total hip replacements. A study of 390,671 primary arthroplasties from the Nordic Arthroplasty Register Association
Schrama, Johannes Cornelis; Fenstad, Anne Marie; Dale, Håvard; Hallan, Geir; Overgaard, Søren; Pedersen, Alma B; Kärrholm, Johan; Garellick, Göran; Pulkkinen, Pekka; Eskelinen, Antti; Mäkelä, Keijo; Engesæter, Lars B.; Fevang, Bjørg-Tilde (Peer reviewed; Journal article, 2015)Background and purpose — Medical treatment of rheumatoid arthritis (RA) has changed dramatically over the last 15 years, including immune modulation. We investigated the risk of revision for infection after primary total ... -
Increasing but levelling out risk of revision due to infection after total hip arthroplasty: a study on 108,854 primary THAs in the Norwegian Arthroplasty Register from 2005 to 2019
Dale, Håvard; Høvding, Pål; Tveit, Sindre M.; Graff, Julie B.; Lutro, Olav; Schrama, Johannes Cornelis; Wik, Tina Strømdal; Skråmm, Inge; Westberg, Marianne; Fenstad, Anne Marie; Hallan, Geir; Engesæter, Lars B.; Furnes, Ove (Journal article; Peer reviewed, 2020)Background and purpose — Focus on prevention, surveillance, and treatment of infection after total hip arthroplasty (THA) in the last decade has resulted in new knowledge and guidelines. Previous publications have suggested ... -
Increasing Resistance of Coagulase-Negative Staphylococci in Total Hip Arthroplasty Infections: 278 THA-Revisions due to Infection Reported to the Norwegian Arthroplasty Register from 1993 to 2007
Lutro, Olav; Langvatn, Håkon; Dale, Håvard; Schrama, Johannes Cornelis; Hallan, Geir; Espehaug, Birgitte; Sjursen, Haakon; Engesæter, Lars B. (Peer reviewed; Journal article, 2014-10-09)We investigated bacterial findings from intraoperative tissue samples taken during revision due to infection after total hip arthroplasty (THA). The aim was to investigate whether the susceptibility patterns changed during ... -
Infected Hip and Knee Arthroplasties in Rheumatoid Arthritis. A register-based study with focus on risk factors
Schrama, Johannes Cornelis (Doctoral thesis, 2014-09-05)Rheumatoid arthritis (RA) is a chronic autoimmune inflammatory disease which primarily affects and damages synovial joints. Patients with RA will therefore often undergo joint replacement surgery. Infections after such ... -
Operating room ventilation and the risk of revision due to infection after total hip arthroplasty: assessment of validated data in the Norwegian Arthroplasty Register
Langvatn, Håkon; Schrama, Johannes Cornelis; Cao, Guangyu; Hallan, Geir; Furnes, Ove; Lingass, Egil; Walenkamp, Geert; Engesæter, Lars Birger; Dale, Håvard (Journal article; Peer reviewed, 2020)Background The air in the operating room is considered a risk factor for surgical site infection (SSI) due to airborne bacteria shed from the surgical staff or from patients themselves. Aim To assess the influence of ... -
Operating room ventilation-Validation of reported data on 108 067 primary total hip arthroplasties in the Norwegian Arthroplasty Register
Langvatn, Håkon; Bartz-Johannessen, Christoffer; Schrama, Johannes Cornelis; Hallan, Geir; Furnes, Ove; Lingaas, Egil; Walenkamp, Geert; Engesæter, Lars B.; Dale, Håvard (Peer reviewed; Journal article, 2020)Rationale, aims, and objectives: The true effect of laminar airflow (LAF) systems on postoperative infection is disputed, partly due to uncertainty regarding the validity of ventilation data in register studies. The aim ...