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  1. Article ; Online: Alternative blood transfusion triggers: a narrative review.

    Arynov, Ardak / Kaidarova, Dilyara / Kabon, Barbara

    BMC anesthesiology

    2024  Volume 24, Issue 1, Page(s) 71

    Abstract: Background: Anemia, characterized by low hemoglobin levels, is a global public health concern. Anemia is an independent factor worsening outcomes in various patient groups. Blood transfusion has been the traditional treatment for anemia; its triggers, ... ...

    Abstract Background: Anemia, characterized by low hemoglobin levels, is a global public health concern. Anemia is an independent factor worsening outcomes in various patient groups. Blood transfusion has been the traditional treatment for anemia; its triggers, primarily based on hemoglobin levels; however, hemoglobin level is not always an ideal trigger for blood transfusion. Additionally, blood transfusion worsens clinical outcomes in certain patient groups. This narrative review explores alternative triggers for red blood cell transfusion and their physiological basis.
    Main text: The review delves into the physiology of oxygen transport and highlights the limitations of using hemoglobin levels alone as transfusion trigger. The main aim of blood transfusion is to optimize oxygen delivery, necessitating an individualized approach based on clinical signs of anemia and the balance between oxygen delivery and consumption, reflected by the oxygen extraction rate. The narrative review covers different alternative triggers. It presents insights into their diagnostic value and clinical applications, emphasizing the need for personalized transfusion strategies.
    Conclusion: Anemia and blood transfusion are significant factors affecting patient outcomes. While restrictive transfusion strategies are widely recommended, they may not account for the nuances of specific patient populations. The search for alternative transfusion triggers is essential to tailor transfusion therapy effectively, especially in patients with comorbidities or unique clinical profiles. Investigating alternative triggers not only enhances patient care by identifying more precise indicators but also minimizes transfusion-related risks, optimizes blood product utilization, and ensures availability when needed. Personalized transfusion strategies based on alternative triggers hold the potential to improve outcomes in various clinical scenarios, addressing anemia's complex challenges in healthcare. Further research and evidence are needed to refine these alternative triggers and guide their implementation in clinical practice.
    MeSH term(s) Humans ; Blood Transfusion ; Erythrocyte Transfusion/adverse effects ; Anemia/therapy ; Hemoglobins ; Oxygen
    Chemical Substances Hemoglobins ; Oxygen (S88TT14065)
    Language English
    Publishing date 2024-02-23
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2091252-3
    ISSN 1471-2253 ; 1471-2253
    ISSN (online) 1471-2253
    ISSN 1471-2253
    DOI 10.1186/s12871-024-02447-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: The effect of goal-directed crystalloid versus colloid administration on postoperative spirometry parameters: a substudy of a randomized controlled clinical trial.

    Obradovic, Mina / Luf, Florian / Reiterer, Christian / Schoppmann, Sebastian / Kurz, Andrea / Fleischmann, Edith / Kabon, Barbara

    Perioperative medicine (London, England)

    2024  Volume 13, Issue 1, Page(s) 28

    Abstract: Background: Pulmonary function is impaired after major abdominal surgery and might be less impaired by restrictive fluid administration. Under the assumption of a fluid-sparing effect of colloids, we tested the hypothesis that an intraoperative colloid- ... ...

    Abstract Background: Pulmonary function is impaired after major abdominal surgery and might be less impaired by restrictive fluid administration. Under the assumption of a fluid-sparing effect of colloids, we tested the hypothesis that an intraoperative colloid-based goal-directed fluid management strategy impairs postoperative pulmonary function parameters less compared to goal-directed crystalloid administration.
    Methods: We performed a preplanned, single-center substudy within a recently published trial evaluating the effect of goal-directed crystalloids versus colloids on a composite of major complications. Sixty patients undergoing major open abdominal surgery were randomized to Doppler-guided intraoperative fluid replacement therapy with lactated Ringer's solution (n = 31) or unbalanced 6% hydroxyethyl starch 130/0.4 (n = 29). A blinded investigator performed bedside spirometry (Spirobank-G, Medical International Research, Rome, Italy) preoperatively as well as 6, 24, and 48 h postoperatively.
    Results: Median total intraoperative fluid requirements were significantly higher during crystalloid administration compared to patients receiving colloids (4567 ml vs. 3044 ml, p = 0.01). Six hours after surgery, pulmonary function parameters did not differ significantly between the crystalloid - and the colloid group: forced vital capacity (FVC): 1.6 l (1.2-2 l) vs. 1.9 l (1.5-2.4 l), p = 0.15; forced expiratory volume in 1 second (FEV1): 1.1 l (0.9-1.6 l) vs. 1.4 l (1.2-1.7 l), p = 0.18; and peak expiratory flow (PEF): 2 l.sec
    Conclusion: Postoperative pulmonary function parameters were similarly impaired in patients receiving goal-directed crystalloid administration as compared to goal-directed colloid administration during open abdominal surgery.
    Trial registration: ClinicalTrials.gov ( NCT00517127 , registered on August 16, 2007) and EudraCT (2005-004602-86).
    Language English
    Publishing date 2024-04-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 2683800-X
    ISSN 2047-0525
    ISSN 2047-0525
    DOI 10.1186/s13741-024-00381-z
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  3. Article: Effect of Supplemental Oxygen on von Willebrand Factor Activity and Ristocetin Cofactor Activity in Patients at Risk for Cardiovascular Complications Undergoing Moderate-to High-Risk Major Noncardiac Surgery-A Secondary Analysis of a Randomized Trial.

    Horvath, Katharina / Taschner, Alexander / Adamowitsch, Nikolas / Falkner von Sonnenburg, Markus / Fleischmann, Edith / Kabon, Barbara / Fraunschiel, Melanie / Reiterer, Christian / Graf, Alexandra

    Journal of clinical medicine

    2023  Volume 12, Issue 3

    Abstract: Increased von Willebrand Factor (vWF) activity mediates platelet adhesion and might be a contributor to the development of thrombotic complications after surgery. Although in vitro studies have shown that hyperoxia induces endovascular damage, the effect ...

    Abstract Increased von Willebrand Factor (vWF) activity mediates platelet adhesion and might be a contributor to the development of thrombotic complications after surgery. Although in vitro studies have shown that hyperoxia induces endovascular damage, the effect of perioperative supplemental oxygen as a possible trigger for increased vWF activity has not been investigated yet. We tested our primary hypothesis that the perioperative administration of 80% oxygen concentration increases postoperative vWF activity as compared to 30% oxygen concentration in patients at risk of cardiovascular complications undergoing major noncardiac surgery. A total of 260 patients were randomly assigned to receive 80% versus 30% oxygen throughout surgery and for two hours postoperatively. We assessed vWF activity and Ristocetin cofactor activity in all patients shortly before the induction of anesthesia, within two hours after surgery and on the first and third postoperative day. Patient characteristics were similar in both groups. We found no significant difference in vWF activity in the overall perioperative time course between both randomization groups. We observed significantly increased vWF activity in the overall study population throughout the postoperative time course. Perioperative supplemental oxygen showed no significant effect on postoperative vWF and Ristocetin cofactor activity in cardiac risk patients undergoing major noncardiac surgery. In conclusion, we found no significant influence of supplemental oxygen in patients undergoing major non-cardiac surgery on postoperative vWF activity and Ristocetin cofactor activity.
    Language English
    Publishing date 2023-02-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12031222
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  4. Article: Hemodynamic effects of intraoperative 30% versus 80% oxygen concentrations: an exploratory analysis.

    Reiterer, Christian / Fleischmann, Edith / Kabon, Barbara / Taschner, Alexander / Kurz, Andrea / Adamowitsch, Nikolas / von Sonnenburg, Markus Falkner / Fraunschiel, Melanie / Graf, Alexandra

    Frontiers in medicine

    2023  Volume 10, Page(s) 1200223

    Abstract: Background: Supplemental oxygen leads to an increase in peripheral vascular resistance which finally increases systemic blood pressure in healthy subjects and patients with coronary artery disease, heart failure, undergoing heart surgery, and with ... ...

    Abstract Background: Supplemental oxygen leads to an increase in peripheral vascular resistance which finally increases systemic blood pressure in healthy subjects and patients with coronary artery disease, heart failure, undergoing heart surgery, and with sepsis. However, it is unknown whether this effect can also be observed in anesthetized patients having surgery. Thus, we evaluated in this exploratory analysis of a randomized controlled trial the effect of 80% versus 30% oxygen on intraoperative blood pressure and heart rate.
    Methods: We present data from a previous study including 258 patients, who were randomized to a perioperative inspiratory FiO
    Results: There was no significant difference in TWA of mean arterial pressure between the 80% (80 mmHg [76, 85]) and 30% (81 mmHg [77, 86]) oxygen group (effect estimate -0.16 mmHg, CI -1.83 to 1.51;
    Conclusion: In contrast to previous results, we did not observe a significant increase in blood pressure or a significant decrease in heart rate in patients, who received 80% oxygen as compared to patients, who received 30% oxygen during surgery and for the first two postoperative hours. Thus, hemodynamic effects of supplemental oxygen might play a negligible role in anesthetized patients.
    Clinical trail registration: https://clinicaltrials.gov/ct2/show/NCT03366857?term=vienna&cond=oxygen&draw=2&rank=1.
    Language English
    Publishing date 2023-05-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2775999-4
    ISSN 2296-858X
    ISSN 2296-858X
    DOI 10.3389/fmed.2023.1200223
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  5. Article ; Online: PerIoperative iNflammatory reSponse assessment In hiGH-risk patienTs undergoing non-cardiac surgery (INSIGHT): study protocol of a prospective non-interventional observational study.

    Pichler, Alexander / Kurz, Andrea / Eichlseder, Michael / Graf, Alexandra / Eichinger, Michael / Taschner, Alexander / Kabon, Barbara / Fleischmann, Edith / Reiterer, Christian

    BMJ open

    2023  Volume 13, Issue 7, Page(s) e065469

    Abstract: Introduction: Increased inflammatory processes after non-cardiac surgery are very common. The association between postoperative inflammation and the occurrence of cardiovascular complications after non-cardiac surgery are still not entirely clear. ... ...

    Abstract Introduction: Increased inflammatory processes after non-cardiac surgery are very common. The association between postoperative inflammation and the occurrence of cardiovascular complications after non-cardiac surgery are still not entirely clear. Therefore, we will evaluate the association between postoperative inflammation and the occurrence of major cardiovascular complications in patients at-risk for cardiovascular complications undergoing non-cardiac surgery. We will further evaluate the association of postoperative inflammation and days-at-home within 30 days after surgery (DAH
    Methods and analysis: In this multicentre study, we will include 1400 patients at-risk for cardiovascular complications undergoing non-cardiac surgery. Our primary aim is to evaluate the association of postoperative maximum C-reactive protein concentration and the occurrence of a composite of five major cardiovascular complications (myocardial infarction, myocardial injury after non-cardiac surgery, new onset of atrial fibrillation, stroke and death) within 30 days after surgery using a Mann-Whitney-U test as well as a logistic regression model. As our secondary aim, we will evaluate the association of a composite of three inflammatory biomarkers (interleukin 6, procalcitonin and copeptin) on the occurrence of our composite of five cardiovascular complications within 30 days and 1 year after surgery, acute kidney injury, DAH
    Ethics and dissemination: This study was approved by the ethics committees at the Medical University of Vienna (2458/2020) and at the Medical University of Graz (33-274 ex 20/21).
    Trial registration number: NCT04753307.
    MeSH term(s) Humans ; Prospective Studies ; Risk Assessment ; Predictive Value of Tests ; Heart Diseases/etiology ; Biomarkers ; Inflammation/complications ; Peptide Fragments ; Natriuretic Peptide, Brain ; Postoperative Complications/epidemiology ; Postoperative Complications/etiology ; Multicenter Studies as Topic ; Observational Studies as Topic
    Chemical Substances Biomarkers ; Peptide Fragments ; Natriuretic Peptide, Brain (114471-18-0)
    Language English
    Publishing date 2023-07-19
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2599832-8
    ISSN 2044-6055 ; 2044-6055
    ISSN (online) 2044-6055
    ISSN 2044-6055
    DOI 10.1136/bmjopen-2022-065469
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Effect of Intraoperative Goal-directed Balanced Crystalloid versus Colloid Administration on Major Postoperative Morbidity: A Randomized Trial.

    Kabon, Barbara / Sessler, Daniel I / Kurz, Andrea

    Anesthesiology

    2019  Volume 130, Issue 5, Page(s) 728–744

    Abstract: Background: Crystalloid solutions leave the circulation quickly, whereas colloids remain for hours, thus promoting hemodynamic stability. However, colloids are expensive and promote renal toxicity in critical care patients. This study tested the ... ...

    Abstract Background: Crystalloid solutions leave the circulation quickly, whereas colloids remain for hours, thus promoting hemodynamic stability. However, colloids are expensive and promote renal toxicity in critical care patients. This study tested the hypothesis that goal-directed colloid administration during elective abdominal surgery decreases 30-day major complications more than goal-directed crystalloid administration.
    Methods: In this parallel-arm double-blinded multicenter randomized trial, adults having moderate- to high-risk open and laparoscopically assisted abdominal surgery with general anesthesia were randomly assigned to Doppler-guided intraoperative volume replacement with 6% hydroxyethyl starch 130/0.4 (n = 523) or lactated Ringer's solution (n = 534). The primary outcome was a composite of serious postoperative cardiac, pulmonary, infectious, gastrointestinal, renal, and coagulation complications that were assessed with a generalized estimating equation multivariate model. The primary safety outcome was a change in serum creatinine concentration up to 6 months postoperatively, compared to baseline concentrations.
    Results: A total of 1,057 patients were included in the analysis. Patients assigned to crystalloid received a median [quartile 1, quartile 3] amount of 3.2 l [2.3, 4.4] of crystalloid, and patients assigned to colloid received 1.0 l [0.5, 1.5] of colloid and 1.8 l [1.2, 2.4] of crystalloid. The estimated intention-to-treat common effect relative risk for the primary composite was 0.90 for colloids versus crystalloids (95% CI: 0.65 to 1.23, P = 0.51), and 18% (91 of 523) of colloid patients and 20% (103 of 534) of crystalloid patients incurred at least one component of the primary outcome composite. There was no evidence of renal toxicity at any time.
    Conclusions: Doppler-guided intraoperative hydroxyethyl starch administration did not significantly reduce a composite of serious complications. However, there was also no indication of renal or other toxicity.
    MeSH term(s) Adult ; Aged ; Colloids/administration & dosage ; Crystalloid Solutions/administration & dosage ; Double-Blind Method ; Female ; Fluid Therapy/methods ; Humans ; Male ; Middle Aged ; Morbidity ; Postoperative Complications/prevention & control
    Chemical Substances Colloids ; Crystalloid Solutions
    Language English
    Publishing date 2019-04-02
    Publishing country United States
    Document type Journal Article ; Multicenter Study ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
    ZDB-ID 269-0
    ISSN 1528-1175 ; 0003-3022
    ISSN (online) 1528-1175
    ISSN 0003-3022
    DOI 10.1097/ALN.0000000000002601
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  7. Article ; Online: Hemodynamic Responses to Crystalloid and Colloid Fluid Boluses during Noncardiac Surgery.

    Reiterer, Christian / Kabon, Barbara / Halvorson, Sven / Sessler, Daniel I / Mascha, Edward J / Kurz, Andrea

    Anesthesiology

    2021  Volume 136, Issue 1, Page(s) 127–137

    MeSH term(s) Adult ; Aged ; Blood Pressure/drug effects ; Blood Pressure/physiology ; Colloids/administration & dosage ; Crystalloid Solutions/administration & dosage ; Female ; Hemodynamics/drug effects ; Hemodynamics/physiology ; Humans ; Hydroxyethyl Starch Derivatives/administration & dosage ; Intraoperative Care/methods ; Male ; Middle Aged ; Plasma Substitutes/administration & dosage
    Chemical Substances Colloids ; Crystalloid Solutions ; Hydroxyethyl Starch Derivatives ; Plasma Substitutes
    Language English
    Publishing date 2021-11-01
    Publishing country United States
    Document type Journal Article ; Multicenter Study ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
    ZDB-ID 269-0
    ISSN 1528-1175 ; 0003-3022
    ISSN (online) 1528-1175
    ISSN 0003-3022
    DOI 10.1097/ALN.0000000000004040
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Perioperative Supplemental Oxygen and Postoperative Copeptin Concentrations in Cardiac-Risk Patients Undergoing Major Abdominal Surgery-A Secondary Analysis of a Randomized Clinical Trial.

    Taschner, Alexander / Kabon, Barbara / Graf, Alexandra / Adamowitsch, Nikolas / Falkner von Sonnenburg, Markus / Fraunschiel, Melanie / Horvath, Katharina / Fleischmann, Edith / Reiterer, Christian

    Journal of clinical medicine

    2022  Volume 11, Issue 8

    Abstract: Noncardiac surgery is associated with hemodynamic perturbations, fluid shifts and hypoxic events, causing stress responses. Copeptin is used to assess endogenous stress and predict myocardial injury. Myocardial injury is common after noncardiac surgery, ... ...

    Abstract Noncardiac surgery is associated with hemodynamic perturbations, fluid shifts and hypoxic events, causing stress responses. Copeptin is used to assess endogenous stress and predict myocardial injury. Myocardial injury is common after noncardiac surgery, and is often caused by myocardial oxygen demand-and-supply mismatch. In this secondary analysis, we included 173 patients at risk for cardiovascular complications undergoing moderate- to high-risk major abdominal surgery. Patients were randomly assigned to receive 80% or 30% oxygen throughout surgery and the first two postoperative hours. We evaluated the effect of supplemental oxygen on postoperative Copeptin concentrations. Copeptin concentrations were measured preoperatively, within two hours after surgery, on the first and third postoperative days. In total, 85 patients received 0.8 FiO2, and 88 patients received 0.3 FiO2. There was no significant difference in postoperative Copeptin concentrations between both study groups (p = 0.446). Copeptin increased significantly within two hours after surgery, compared with baseline in the overall study population (estimated effect: −241.7 pmol·L−1; 95% CI −264.4, −219.1; p < 0.001). Supplemental oxygen did not significantly attenuate postoperative Copeptin release. Copeptin concentrations showed a more immediate postoperative increase compared with previously established biomarkers. Nevertheless, Copeptin concentrations did not surpass Troponin T in early determination of patients at risk for developing myocardial injury after noncardiac surgery.
    Language English
    Publishing date 2022-04-07
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm11082085
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  9. Article: Perioperative Supplemental Oxygen and Plasma Catecholamine Concentrations after Major Abdominal Surgery-Secondary Analysis of a Randomized Clinical Trial.

    Taschner, Alexander / Kabon, Barbara / Falkner von Sonnenburg, Markus / Graf, Alexandra / Adamowitsch, Nikolas / Fraunschiel, Melanie / Fleischmann, Edith / Reiterer, Christian

    Journal of clinical medicine

    2022  Volume 11, Issue 7

    Abstract: Perioperative stress is associated with increased sympathetic activity that leads to increases in heart rate and blood pressure, which are associated with the development of perioperative myocardial ischemia. In healthy volunteers, it was shown that the ... ...

    Abstract Perioperative stress is associated with increased sympathetic activity that leads to increases in heart rate and blood pressure, which are associated with the development of perioperative myocardial ischemia. In healthy volunteers, it was shown that the administration of supplemental oxygen attenuated sympathetic nerve activity and subsequently led to lower plasma catecholamine concentrations. We therefore tested the hypothesis that perioperative supplemental oxygen attenuates sympathetic nerve in patients at risk for cardiovascular complications undergoing major abdominal surgery. We randomly assigned 81 patients to receive either 80% or 30% inspired oxygen concentration throughout surgery and the first two postoperative hours. We assessed noradrenaline, adrenaline, and dopamine plasma concentrations before the induction of anesthesia, two hours after surgery and on the third postoperative day. There was no significant difference in postoperative noradrenaline (effect estimated: -41.5 ng·L
    Language English
    Publishing date 2022-03-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm11071767
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  10. Article ; Online: The determination of real fluid requirements in laparoscopic resection of pheochromocytoma using minimally invasive hemodynamic monitoring: a prospectively designed trial.

    Niederle, Martin B / Fleischmann, Edith / Kabon, Barbara / Niederle, Bruno

    Surgical endoscopy

    2019  Volume 34, Issue 1, Page(s) 368–376

    Abstract: Background: Hemodynamic instability is frequently observed during adrenalectomy for pheochromocytoma (PCC). Guidelines recommend liberal preoperative volume administration. However, it is unclear whether fluid deficiency or vasoplegia causes shifting ... ...

    Abstract Background: Hemodynamic instability is frequently observed during adrenalectomy for pheochromocytoma (PCC). Guidelines recommend liberal preoperative volume administration. However, it is unclear whether fluid deficiency or vasoplegia causes shifting hemodynamics and whether minimally invasive hemodynamic monitoring with esophageal Doppler (EDM) can help visualize intraoperative changes avoiding volume overload and complications.
    Methods: Ten patients with biochemically verified PCC and five patients with hormonally inactive adrenal tumors (HIAT; control group) were treated following a strict protocol. During laparoscopic adrenalectomy, goal-directed fluid therapy was performed using EDM. Hemodynamic and biochemical data were documented. The primary outcome variables were fluid requirement and hemodynamic parameters.
    Results: Applying EDM, total intraoperative fluid administration was slightly higher in PCC patients than in patients with HIAT (2100 ± 516 vs. 1550 ± 622 ml, p = 0.097; 12.9 ± 4.8 vs. 8.3 ± 0.7 ml kg
    Conclusions: As vasoplegia, but not hypovolemia, was documented after tumor resection, there is no evidence that PCC patients profit from liberal fluid administration during laparoscopic adrenalectomy. To avoid volume overload, noninvasive techniques such as EDM should be routinely used to visualize the variable intraoperative course.
    Trial registration: ClinicalTrials.gov, Identifier: NCT01425710.
    MeSH term(s) Adrenal Gland Neoplasms/physiopathology ; Adrenal Gland Neoplasms/surgery ; Adrenalectomy/methods ; Adult ; Case-Control Studies ; Esophagus/diagnostic imaging ; Female ; Fluid Therapy/methods ; Hemodynamic Monitoring/methods ; Hemodynamics ; Humans ; Laparoscopy/methods ; Male ; Middle Aged ; Perioperative Care/methods ; Pheochromocytoma/physiopathology ; Pheochromocytoma/surgery ; Prospective Studies ; Treatment Outcome ; Ultrasonography, Doppler
    Language English
    Publishing date 2019-04-11
    Publishing country Germany
    Document type Journal Article ; Observational Study ; Research Support, Non-U.S. Gov't
    ZDB-ID 639039-0
    ISSN 1432-2218 ; 0930-2794
    ISSN (online) 1432-2218
    ISSN 0930-2794
    DOI 10.1007/s00464-019-06777-z
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