• Diverting stomas reduce reoperation rates for anastomotic leak but not overall reoperation rates within 30 days after anterior rectal resection: a national cohort study 

      Myrseth, Elisabeth; Nymo, Linn Såve; Gjessing, Petter Fosse; Norderval, Stig (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-24)
      Purpose A diverting stoma is commonly formed to reduce the rate of anastomotic leak following anterior resection with anastomosis, although some studies question this strategy. The aim of this study was to assess the leak rates and overall complication burden after anterior resection with and without a diverting stoma.<p> <p>Methods A 5-year national cohort with prospectively registered data of ...
    • Endoscopic full-thickness dissection (EFTD) in the rectum: a case series 

      Rushfeldt, Christian; Nordbø, M.; Steigen, Sonja Eriksson; Dehli, Trond; Gjessing, Petter Fosse; Norderval, Stig (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-28)
      Background Rectal endoscopic full- thickness dissection (EFTD) using a fexible colonoscope is an alternative to the wellestablished trans-anal endoscopic microsurgery (TEM) and the trans-anal minimally invasive surgery (TAMIS) techniques for resecting dysplastic or malignant rectal lesions. This study evaluated EFTD safety by analyzing outcomes of the frst patients to undergo rectal EFTD at the ...
    • Laparoscopic rectal cancer resection yields comparable clinical and oncological results with shorter hospital stay compared to open access: a 5-year national cohort 

      Myrseth, Elisabeth; Gjessing, Petter Fosse; Nymo, Linn Såve; Kørner, Hartwig; Kvaløy, Jan Terje; Norderval, Stig (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-04)
      Purpose Although widely applied, the results following laparoscopic rectal resection (LRR) compared to open rectal resection (ORR) are still debated. The aim of this study was to assess clinical short- and long-term results as well as oncological resection quality following LRR or ORR for cancer in a 5-year national cohort.<p> <p>Methods Data from the Norwegian Registry for Gastrointestinal Surgery ...
    • Lower conversion rate with robotic assisted rectal resections compared with conventional laparoscopy; a national cohort study 

      Myrseth, Elisabeth; Nymo, Linn Såve; Gjessing, Petter Fosse; Kørner, Hartwig; Kvaløy, Jan Terje; Norderval, Stig (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-18)
      <i>Background</i> - Conversion from laparoscopic to open access colorectal surgery is associated with a poorer postoperative outcome. The aim of this study was to assess conversion rates and outcomes after standard laparoscopic rectal resection (LR) and robotic laparoscopic rectal resection (RR).<br><br> <i>Methods</i> - A national 5-year cohort study utilizing prospectively recorded data on ...
    • Perioperative infusion of glucagon-like peptide-1 prevents insulin resistance after surgical trauma in female pigs 

      Hagve, Martin Iversen; Gjessing, Petter Fosse; Hole, Mikal Jacob; Jansen, Kirsten M; Fuskevåg, Ole Martin; Mollnes, Tom Eirik; Larsen, Terje S; Irtun, Øivind (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-07)
      Insulin resistance is an independent negative predictor of outcome after elective surgery and increases mortality among surgical patients in intensive care. The incretin hormone glucagon-like peptide-1 (GLP-1) potentiates glucose-induced insulin release from the pancreas but may also increase insulin sensitivity in skeletal muscle and directly suppress hepatic glucose release. Here, we investigated ...
    • Postoperative insulin resistance and the metabolic and cellular responses to single-dose preoperative oral carbohydrate supplementation – Experimental studies in pigs 

      Gjessing, Petter Fosse (Doctoral thesis; Doktorgradsavhandling, 2014-06-17)
      Gjennom en serie eksperimentelle studier på gris, inkludert etablering av en målemetode for utvikling av akutt insulinresistens, ble endringer i insulinsensitivitet og i lever- og skjelettmuskelceller undersøkt etter et stort kirurgisk inngrep. Resultatene viser at de cellulære endringene som ledsager utvikling av insulinresistens etter kirurgi har mange likhetstrekk med de endringer man ser ved ...
    • Spinal Anaesthesia as an Adjunct to General Anaesthesia for Laparoscopic Abdominoperineal Rectal Amputation 

      Antunes, Marisa; Baumgärtel, Aleksander Johannes; Gjessing, Petter Fosse; Ytrebø, Lars Marius Giske (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-31)
      Background: Spinal anaesthesia as an adjunct to general anaesthesia may reduce postoperative pain and opioid consumption after laparoscopic abdominoperineal rectal amputation. We designed a randomized double blinded pilot study with two objectives: 1) to explore potential benefits of spinal anaesthesia as an adjunct to general anaesthesia and 2) to provide power and sample size estimations for ...