Blar i Bergen Open Research Archive på forfatter "Hallan, Geir"
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Increasing risk of revision due to deep infection after hip arthroplasty. A study on 97,344 primary total hip replacements in the Norwegian Arthroplasty Register from 1987 to 2007
Dale, Håvard; Hallan, Geir; Espehaug, Birgitte; Havelin, Leif Ivar; Engesæter, Lars B. (Peer reviewed; Journal article, 2009-12)Background and purpose: Over the decades, improvements in surgery and perioperative routines have reduced the incidence of deep infections after total hip arthroplasty (THA). There is, however, some evidence to suggest ... -
Increasing risk of revision due to infection after primary total hip arthroplasty: results from the Nordic Arthroplasty Register Association
Dale, Håvard; Fenstad, Anne Marie; Hallan, Geir; Overgaard, Søren; Pedersen, Alma B.; Hailer, Nils P.; Kärrholm, Johan; Rolfson, Ola; Eskelinen, Antti; Mäkelä, Keijo T.; Furnes, Ove Nord (Journal article; Peer reviewed, 2023)Background and purpose: The incidence of periprosthetic joint infection after total hip arthroplasty (THA) may be increasing. We performed time-trend analyses of risk, rates, and timing of revision due to infection after ... -
Inflammatory tissue reactions around aseptically loose cemented hip prostheses: A retrieval study of the Spectron EF stem with Reflection All-Poly acetabular cup
Wolf, Susann; Johannessen, Anne Christine; Ellison, Peter; Furnes, Ove Nord; Hallan, Geir; Rogg, Katharina; Skarstein, Kathrine; Høl, Paul Johan (Journal article; Peer reviewed, 2022)The cemented Spectron EF stem in combination with the cemented non-crosslinked Reflection All-Poly cup showed a high rate of mid-term aseptic loosening. However, the failure mechanisms are not fully known. We assessed the ... -
Is there a reduction in risk of revision when 36-mm heads instead of 32 mm are used in total hip arthroplasty for patients with proximal femur fractures?
Tsikandylakis, G; Kärrholm, Johan; Hallan, Geir; Furnes, Ove; Eskelinen, Antti; Mäkelä, Keijo T.; Pedersen, Alma B; Overgaard, Søren; Mohaddes, M. (Journal article; Peer reviewed, 2020)Background and purpose — 32-mm heads are widely used in total hip arthroplasty (THA) in Scandinavia, while the proportion of 36-mm heads is increasing as they are expected to increase THA stability. We investigated whether ... -
Is there a weekend effect after hip fracture surgery? A study of 74,410 hip fractures reported to the Norwegian Hip Fracture Register
Boutera, Andrea; Dybvik, Eva Hansen; Hallan, Geir; Gjertsen, Jan-Erik (Peer reviewed; Journal article, 2020)Background and purpose — The term “weekend effect” describes differences in outcomes between patients treated at weekends compared with weekdays. We investigated whether there is a weekend effect for the risk of reoperation ... -
Kaplan-Meier and Cox Regression Are Preferable for the Analysis of Time to Revision of Joint Arthroplasty: Thirty-One Years of Follow-up for Cemented and Uncemented THAs Inserted from 1987 to 2000 in the Norwegian Arthroplasty Register
Lie, Stein Atle; Fenstad, Anne Marie; Lygre, Stein Håkon Låstad; Kroken, Gard; Dybvik, Eva Hansen; Gjertsen, Jan-Erik; Hallan, Geir; Dale, Håvard; Furnes, Ove Nord (Journal article; Peer reviewed, 2022)Background: Previous studies have suggested that the probability function of 1 minus the Kaplan-Meier survivorship overestimates revision rates of implants and that patient death should be included in estimates as a competing ... -
Low infection rates after 34,361 intramedullary nail operations in 55 low- and middle-income countries. Validation of the Surgical Implant Generation Network (SIGN) Online Surgical Database
Young, Sven; Lie, Stein Atle; Hallan, Geir; Zirkle, Lewis G.; Engesæter, Lars B.; Havelin, Leif Ivar (Peer reviewed; Journal article, 2011-12)Background: The Surgical Implant Generation Network (SIGN) supplies intramedullary (IM) nails for the treatment of long bone fractures free of charge to hospitals in low- and middle-income countries (LMICs). Most operations ... -
Metallionenivåer i blod fra pasienter med metall-mot-metall-hofteprotese
Høl, Paul Johan; Hallan, Geir; Indrekvam, Kari (Journal article; Peer reviewed, 2021)Bakgrunn: BHR-protese (Birmingham hip resurfacing) er satt inn i hoften til 445 personer i Norge. Bivirkninger av metallfrigjøring fra metall-mot-metall-leddflater av kobolt-krom-legering kan forekomme. Målet med studien ... -
No difference in risk of revision due to infection between clindamycin and cephalosporins as antibiotic prophylaxis in cemented primary total knee replacements: a report from the Norwegian Arthroplasty Register 2005–2020
Pawloy, Karola; Fenstad, Anne Marie; Leta, Tesfaye Hordofa; Hallan, Geir; Gjertsen, Jan-Erik; Dale, Håvard; Lie, Stein Atle; Furnes, Ove Nord (Journal article; Peer reviewed, 2023)Background and purpose: Systemic antibiotic prophylaxis with clindamycin, which is often used in penicillin- or cephalosporin-allergic patients’, has been associated with a higher risk of surgical revision for deep prosthetic ... -
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 ... -
Outcome at 1 year in patients with femoral shaft fractures treated with intramedullary nailing or skeletal traction in a low-income country: a prospective observational study of 187 patients in Malawi
Chokotho, Linda; Wu, Hao-Hua; Shearer, David; Lau, Brian C.; Mkandawire, Nyengo; Gjertsen, Jan Erik; Hallan, Geir; Young, Sven (Journal article; Peer reviewed, 2020)Background and purpose — Intramedullary nailing (IMN) is underutilized in low-income countries (LICs) where skeletal traction (ST) remains the standard of care for femoral shaft fractures. This prospective study compared ... -
Perioperative, short, and long-term mortality related to fixation in primary total hip arthroplasty: a study of 79,557 patients in the Norwegian Arthroplasty Register
Dale, Håvard; Børsheim, Sjur; Kristensen, Torbjørn; Fenstad, Anne Marie; Gjertsen, Jan-Erik; Hallan, Geir; Lie, Stein Atle; Furnes, Ove (Peer reviewed; Journal article, 2019-12-13)Background and purpose — There are reports on perioperative deaths in cemented total hip arthroplasty (THA), and THA revisions are associated with increased mortality. We compared perioperative (intraoperatively or within ... -
Polycrystalline Diamond Coating on Orthopedic Implants: Realization and Role of Surface Topology and Chemistry in Adsorption of Proteins and Cell Proliferation
Zalieckas, Justas; Rios Mondragon, Ivan; Pobedinskas, Paulius; Kristoffersen, Arne Skodvin; Mohamed-Ahmed, Samih; Gjerde, Cecilie; Høl, Paul Johan; Hallan, Geir; Furnes, Ove Nord; Cimpan, Mihaela-Roxana; Haenen, Ken; Holst, Bodil; Greve, Martin Møller (Journal article; Peer reviewed, 2022)Polycrystalline diamond has the potential to improve the osseointegration of orthopedic implants compared to conventional materials such as titanium. However, despite the excellent biocompatibility and superior mechanical ... -
Prevalence, causes and impact of musculoskeletal impairment in Malawi: A national cluster randomized survey
Ngoie, Leonard Banza; Dybvik, Eva Hansen; Hallan, Geir; Gjertsen, Jan-Erik; Mkandawire, Nyengo; Varela, Carlos Gomes; Young, Sven (Journal article; Peer reviewed, 2021)Background: There is a lack of accurate information on the prevalence and causes of musculoskeletal impairment (MSI) in low income countries. The WHO prevalence estimate does not help plan services for specific national ... -
A randomized study on migration of the Spectron EF and the Charnley flanged 40 cemented femoral components using radiostereometric analysis at 2 years
Kadar, Thomas; Hallan, Geir; Aamodt, Arild; Indrekvam, Kari; Badawy, Mona; Havelin, Leif Ivar; Stokke, Terje; Haugan, Kristin; Espehaug, Birgitte; Furnes, Ove (Peer reviewed; Journal article, 2011-10)Background and purpose: We performed a randomized study to determine the migration patterns of the Spectron EF femoral stem and to compare them with those of the Charnley stem, which is regarded by many as the gold standard ... -
A randomized study on migration of the Spectron EF and the Charnley flanged 40 cemented femoral components using radiostereometric analysis at 2 years
Kadar, Thomas; Hallan, Geir; Aamodt, Arild; Indrekvam, Kari; Badawy, Mona; Havelin, Leif Ivar; Stokke, Terje; Haugan, Kristin; Espehaug, Birgitte; Furnes, Ove (Peer reviewed; Journal article, 2011-11-24)Background and purpose: We performed a randomized study to determine the migration patterns of the Spectron EF femoral stem and to compare them with those of the Charnley stem, which is regarded by many as the gold standard ... -
Risk Factors for Infection after 46,113 Intramedullary Nail Operations in Low- and Middle-income Countries
Young, Sven; Lie, Stein Atle; Hallan, Geir; Zirkle, Lewis G.; Engesæter, Lars B.; Havelin, Leif Ivar (Peer reviewed; Journal article, 2013-02)Background: The fields of surgery and trauma care have largely been neglected in the global health discussion. As a result the idea that surgery is not safe or cost effective in resource-limited settings has gone unchallenged. ... -
Risk factors for revision surgery due to dislocation within 1 year after 111,711 primary total hip arthroplasties from 2005 to 2019: a study from the Norwegian Arthroplasty Register
Thoen, Peder Svenkerud; Lygre, Stein Håkon Låstad; Nordsletten, Lars; Furnes, Ove Nord; Stigum, Hein; Hallan, Geir; Röhrl, Stephan Maximillian (Journal article; Peer reviewed, 2022)Background and purpose: Dislocation of a hip prosthesis is the 3rd most frequent cause (after loosening and infection) for hip revision in Norway. Recently there has been a shift in surgical practice including preferred ... -
Similarly low-blood metal ion levels at 10-years follow-up of total hip arthroplasties with Oxinium, CoCrMo, and stainless steel femoral heads. Data from a randomized clinical trial
Høl, Paul Johan; Hallan, Geir; Furnes, Ove Nord; Fenstad, Anne Marie; Indrekvam, Kari; Kadar, Thomas (Journal article; Peer reviewed, 2022)The use of inert head materials such as ceramic heads has been proposed as a method of reducing wear and corrosion products from the articulating surfaces in total hip arthroplasty, as well as from the stem-head taper ...