@article{DoehlerRoederSchlesingeretal.2023,
  author    = {D{\"o}hler, Ida and R{\"o}der, Daniel and Schlesinger, Tobias and Nassen, Christian Alexander and Germer, Christoph-Thomas and Wiegering, Armin and Lock, Johan Friso},
  title     = {Risk-adjusted perioperative bridging anticoagulation reduces bleeding complications without increasing thromboembolic events in general and visceral surgery},
  series = {BMC Anesthesiology},
  volume    = {23},
  journal   = {BMC Anesthesiology},
  doi       = {10.1186/s12871-023-02017-z},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-357305},
  year      = {2023},
  abstract  = {Background Perioperative bridging of oral anticoagulation increases the risk of bleeding complications after elective general and visceral surgery. The aim of this study was to explore, whether an individual risk-adjusted bridging regimen can reduce bleeding events, while still protecting against thromboembolic events. Methods We performed a quality improvement study comparing bridging parameters and postoperative outcomes before (period 1) and after implementation (period 2) of a new risk-adjusted bridging regimen. The primary endpoint of the study was overall incidence of postoperative bleeding complications during 30 days postoperatively. Secondary endpoints were major postoperative bleeding, minor bleeding, thromboembolic events, postoperative red blood cell transfusion, perioperative length-of-stay (LOS) and in-hospital mortality. Results A total of 263 patients during period 1 and 271 patients during period 2 were compared. The included elective operations covered the entire field of general and visceral surgery. The overall incidence of bleeding complications declined from 22.1\% during period 1 to 10.3\% in period 2 (p < 0.001). This reduction affected both major as well as minor bleeding events (8.4\% vs. 4.1\%; p = 0.039; 13.7\% vs. 6.3\%; p = 0.004). The incidence of thromboembolic events remained low (0.8\% vs. 1.1\%). No changes in mortality or length-of-stay were observed. Conclusion It is important to balance the individual thromboembolic and bleeding risks in perioperative bridging management. The risk adjusted bridging regimen reduces bleeding events in general and visceral surgery while the risk of thromboembolism remains comparably low.},
  language  = {en}
}
@article{JustSchollBoehmeetal.2021,
  author    = {Just, Katja S. and Scholl, Catharina and Boehme, Miriam and Kastenm{\"u}ller, Kathrin and Just, Johannes M. and Bleckwenn, Markus and Holdenrieder, Stefan and Meier, Florian and Weckbecker, Klaus and Stingl, Julia C.},
  title     = {Individualized versus standardized risk assessment in patients at high risk for adverse drug reactions (the IDrug randomized controlled trial) - never change a running system?},
  series = {Pharmaceuticals},
  volume    = {14},
  journal   = {Pharmaceuticals},
  number    = {10},
  issn      = {1424-8247},
  doi       = {10.3390/ph14101056},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-248557},
  year      = {2021},
  abstract  = {The aim of this study was to compare effects of an individualized with a standardized risk assessment for adverse drug reactions to improve drug treatment with antithrombotic drugs in older adults. A randomized controlled trial was conducted in general practitioner (GP) offices. Patients aged 60 years and older, multi-morbid, taking antithrombotic drugs and at least one additional drug continuously were randomized to individualized and standardized risk assessment groups. Patients were followed up for nine months. A composite endpoint defined as at least one bleeding, thromboembolic event or death reported via a trigger list was used. Odds ratios (OR) and 95\% confidence intervals (CI) were calculated. In total, N = 340 patients were enrolled from 43 GP offices. Patients in the individualized risk assessment group met the composite endpoint more often than in the standardized group (OR 1.63 [95\%CI 1.02-2.63]) with multiple adjustments. The OR was higher in patients on phenprocoumon treatment (OR 1.99 [95\%CI 1.05-3.76]), and not significant on DOAC treatment (OR 1.52 [95\%CI 0.63-3.69]). Pharmacogenenetic variants of CYP2C9, 2C19 and VKORC1 were not observed to be associated with the composite endpoint. The results of this study may indicate that the time point for implementing individualized risk assessments is of importance.},
  language  = {en}
}
@article{LockUngeheuerBorstetal.2020,
  author    = {Lock, J. F. and Ungeheuer, L. and Borst, P. and Swol, J. and L{\"o}b, S. and Brede, E. M. and R{\"o}der, D. and Lengenfelder, B. and Sauer, K. and Gremer, C. - T.},
  title     = {Markedly increased risk of postoperative bleeding complications during perioperative bridging anticoagulation in general and visceral surgery},
  series = {Perioperative Medicine},
  volume    = {9},
  journal   = {Perioperative Medicine},
  doi       = {10.1186/s13741-020-00170-4},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-230690},
  year      = {2020},
  abstract  = {Background Increasing numbers of patients receiving oral anticoagulants are undergoing elective surgery. Low molecular weight heparin (LMWH) is frequently applied as bridging therapy during perioperative interruption of anticoagulation. The aim of this study was to explore the postoperative bleeding risk of patients receiving surgery under bridging anticoagulation. Methods We performed a monocentric retrospective two-arm matched cohort study. Patients that received perioperative bridging anticoagulation were compared to a matched control group with identical surgical procedure, age, and sex. Emergency and vascular operations were excluded. The primary endpoint was the incidence of major postoperative bleeding. Secondary endpoints were minor postoperative bleeding, thromboembolic events, length of stay, and in-hospital mortality. Multivariate analysis explored risk factors of major postoperative bleeding. Results A total of 263 patients in each study arm were analyzed. The patient cohort included the entire field of general and visceral surgery including a large proportion of major oncological resections. Bridging anticoagulation increased the postoperative incidence of major bleeding events (8\% vs. 1\%; p < 0.001) as well as minor bleeding events (14\% vs. 5\%; p < 0.001). Thromboembolic events were equally rare in both groups (1\% vs. 2\%; p = 0.45). No effect on mortality was observed (1.5\% vs. 1.9\%). Independent risk factors of major postoperative bleeding were full-therapeutic dose of LMWH, renal insufficiency, and the procedure-specific bleeding risk. Conclusion Perioperative bridging anticoagulation, especially full-therapeutic dose LMWH, markedly increases the risk of postoperative bleeding complications in general and visceral surgery. Surgeons should carefully consider the practice of routine bridging.},
  language  = {en}
}