@article{LehmannOehlerZuberetal.2020,
  author    = {Lehmann, Martin and Oehler, Beatrice and Zuber, Jonas and Malzahn, Uwe and Walles, Thorsten and Muellenbach, Ralf M. and Roewer, Norbert and Kredel, Markus},
  title     = {Redistribution of pulmonary ventilation after lung surgery detected with electrical impedance tomography},
  series = {Acta Anaesthesiologica Scandinavica},
  volume    = {64},
  journal   = {Acta Anaesthesiologica Scandinavica},
  number    = {4},
  doi       = {10.1111/aas.13525},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-213575},
  pages     = {517-525},
  year      = {2020},
  abstract  = {Background: Regional ventilation of the lung can be visualized by pulmonary electrical impedance tomography (EIT). The aim of this study was to examine the post-operative redistribution of regional ventilation after lung surgery dependent on the side of surgery and its association with forced vital capacity. Methods: In this prospective, observational cohort study 13 patients undergoing right and 13 patients undergoing left-sided open or video-thoracoscopic procedures have been investigated. Pre-operative measurements with EIT and spirometry were compared with data obtained 3 days post-operation. The center of ventilation (COV) within a 32 × 32 pixel matrix was calculated from EIT data. The transverse axis coordinate of COV, COVx (left/right), was modified to COVx′ (ipsilateral/contralateral). Thus, COVx′ shows a negative change if ventilation shifts contralateral independent of the side of surgery. This enabled testing with two-way ANOVA for repeated measurements (side, time). Results: The perioperative shift of COVx′ was dependent on the side of surgery (P = .007). Ventilation shifted away from the side of surgery after the right-sided surgery (COVx′-1.97 pixel matrix points, P < .001), but not after the left-sided surgery (COVx′-0.61, P = .425). The forced vital capacity (\%predicted) decreased from 94 (83-109)\% (median [quartiles]; [left-sided]) and 89 (80-97)\% (right-sided surgery) to 61 (59-66)\% and 62 (40-72)\% (P < .05), respectively. The perioperative changes in forced vital capacity (\%predicted) were weakly associated with the shift of COVx′. Conclusion: Only after right-sided lung surgery, EIT showed reduced ventilation on the side of surgery while vital capacity was markedly reduced in both groups.},
  language  = {en}
}
@article{TorkzadMasselliHalliganetal.2015,
  author    = {Torkzad, Michael R. and Masselli, Gabriele and Halligan, Steve and Oto, Aytek and Neubauer, Henning and Taylor, Stuart and Gupta, Arun and Fr{\o}kj{\ae}r, Jens Br{\o}ndum and Lawrance, Ian C. and Welman, Christopher J. and Neg{\aa}rd, Anne and Ekberg, Olle and Patak, Michael and Lauenstein, Thomas},
  title     = {Indications and selection of MR enterography vs. MR enteroclysis with emphasis on patients who need small bowel MRI and general anaesthesia: results of a survey},
  series = {Insights into Imaging},
  volume    = {6},
  journal   = {Insights into Imaging},
  number    = {3},
  doi       = {10.1007/s13244-015-0384-2},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-149847},
  pages     = {339-346},
  year      = {2015},
  abstract  = {Aims To survey the perceived indications for magnetic resonance imaging of the small bowel (MRE) by experts, when MR enteroclysis (MREc) or MR enterography (MREg) may be chosen, and to determine how the approach to MRE is modified when general anaesthesia (GA) is required. Materials and methods Selected opinion leaders in MRE completed a questionnaire that included clinical indications (MREg or MREc), specifics regarding administration of enteral contrast, and how the technique is altered to accommodate GA. Results Fourteen responded. Only the diagnosis and follow-up of Crohn's disease were considered by over 80 \% as a valid MRE indication. The remaining indications ranged between 35.7 \% for diagnosis of caeliac disease and unknown sources of gastrointestinal bleeding to 78.6 \% for motility disorders. The majority chose MREg over MREc for all indications (from 100 \% for follow-up of caeliac disease to 57.7 \% for tumour diagnosis). Fifty per cent of responders had needed to consider MRE under GA. The most commonly recommended procedural change was MRI without enteral distention. Three had experience with intubation under GA (MREc modification). Conclusion Views were variable. Requests for MRE under GA are not uncommon. Presently most opinion leaders suggest standard abdominal MRI when GA is required.},
  language  = {en}
}