Adler, D. M. T., Hopster, K., Hopster-Iversen, C., Fenner, M., Buhl, R., Jacobsen, S. Thoracotomy and Pericardiotomy for Access to the Heart in Horses: Surgical Procedure and Effects on Anesthetic Variables J Equine Vet Sci 96: 103315, 2021.Floriano, D. A., Hopster, K., Broek, A. R. V., Reef, V. B., Slack, J. Anesthesia Case of the Month J Am Vet Med Assoc 258: 1341-1344, 2021.Hurcombe, S. D., Klein, C. E., Roessner, H. A., Engiles, J. B., Hopster, K. Use of polyamide cable ties during experimental omentectomy in adult horses with histopathological assessment Vet Surg : , 2021.VanderBroek, A. R., Engiles, J. B., Kästner, S. B. R., Kopp, V., Verhaar, N., Hopster, K. Protective effects of dexmedetomidine on small intestinal ischaemia-reperfusion injury in horses Equine Vet J 53: 569-578, 2021.Hopster, K., Soma, L. R., Li, X., Hopster-Iversen, C., Boston, R. C., Driessen, B. Pharmacokinetics of xylazine after 2-, 4-, and 6-hr durations of continuous rate infusions in horses J Vet Pharmacol Ther 43: 557-564, 2020.Hurcombe, S. D., Morris, T. B., VanderBroek, A. R., Habecker, P., Wulster, K., Hopster, K. Cervical Epidural and Subarachnoid Catheter Placement in Standing Adult Horses Front Vet Sci 7: 232, 2020.König, K. S., Verhaar, N., Hopster, K., Pfarrer, C., Neudeck, S., Rohn, K., Kästner, S. B. R. Ischaemic preconditioning and pharmacological preconditioning with dexmedetomidine in an equine model of small intestinal ischaemia-reperfusion PLoS ONE 15: e0224720, 2020.Luethy, D., Hopster, K. Electrolyte measurement in goats: Comparison of 2 blood gas analyzers and evaluation of the preanalytical blood sample preparation on measurement results Tierarztl Prax Ausg G Grosstiere Nutztiere 48: 148-155, 2020.Gaesser, A. M., Varner, K. M., Douglas, H. F., Barr, C. A., Hopster, K., Levine, D. G. The effect of intra-articular mepivacaine administration prior to carpal arthroscopy on anesthesia management and recovery characteristics in horses Vet Surg 49: 1343-1349, 2020.Arndt, S., Hopster, K., Sill, V., Rohn, K., Kästner, S. B. R. Comparison between head-tail-rope assisted and unassisted recoveries in healthy horses undergoing general anesthesia for elective surgeries Vet Surg 49: 329-338, 2020.Cerullo, M., Driessen, B., Douglas, H., Hopster, K. Changes in Arterial Blood Pressure and Oxygen Tension as a Result of Hoisting in Isoflurane Anesthetized Healthy Adult Horses Front Vet Sci 7: 601326, 2020.Crandall, A., Hopster, K., Grove, A., Levine, D. Intratesticular mepivacaine versus lidocaine in anaesthetised horses undergoing Henderson castration Equine Vet J 52: 805-810, 2020.Douglas, H., Hopster, K., Cerullo, M., Hopster-Iversen, C., Stefanovski, D., Driessen, B. The effects of flumazenil on ventilatory and recovery characteristics in horses following midazolam-ketamine induction and isoflurane anaesthesia Equine Vet J : , 2020.Floriano, D., Hopster, K., Driessen, B. Accuracy of tidal volume delivery by five different models of large-animal ventilators Am J Vet Res 81: 857-864, 2020.Echelmeyer, J., Taylor, P. M., Hopster, K., Rohn, K., Delarocque, J., Kästner, S. B. R. Effect of fentanyl on thermal and mechanical nociceptive thresholds in horses and estimation of anti-nociceptive plasma concentration Vet J 249: 82-88, 2019.Hopster, K., Bertone, C., Driessen, B. Evaluation of the effects of gas volume and composition on accuracy of volume measurement by two flow sensors and delivery by a piston-driven large-animal ventilator Am J Vet Res 80: 135-143, 2019.Varner, K. M., Hopster, K., Driessen, B. Comparison of various types of inert gas components on efficacy of an alveolar recruitment maneuver in dorsally recumbent anesthetized horses Am J Vet Res 80: 631-636, 2019.Wittenberg-Voges, L., Kästner, S. B., Raekallio, M., Vainio, O. M., Rohn, K., Hopster, K. Effect of dexmedetomidine and xylazine followed by MK-467 on gastrointestinal microperfusion in anaesthetized horses Vet Anaesth Analg 45: 165-174, 2018.Neudeck, S., Kästner, S. B. R., Wittenberg-Voges, L., Rohn, K., Hopster, K. Comparison of desflurane and propofol at equipotent doses in combination with a constant rate infusion of dexmedetomidine on global and peripheral perfusion and oxygenation in horses Am J Vet Res 79: 487-495, 2018.Reiners, J. K., Rossdeutscher, W., Hopster, K., Kästner, S. B. R. Development and clinical evaluation of a new sensor design for buccal pulse oximetry in horses Equine Vet J 50: 228-234, 2018.Hopster, K., Duffee, L. R., Hopster-Iversen, C. C. S., Driessen, B. Efficacy of an alveolar recruitment maneuver for improving gas exchange and pulmonary mechanics in anesthetized horses ventilated with oxygen or a helium-oxygen mixture Am J Vet Res 79: 1021-1027, 2018.Hopster, K., Neudeck, S., Wittenberg-Voges, L., Kästner, S. B. The relationship between intestinal and oral mucosa microcirculation in anaesthetized horses Vet Anaesth Analg 45: 78-81, 2018.Dancker, C., Hopster, K., Rohn, K., Kästner, S. B. Effects of dobutamine, dopamine, phenylephrine and noradrenaline on systemic haemodynamics and intestinal perfusion in isoflurane anaesthetised horses Equine Vet J 50: 104-110, 2018.Dönselmann Im Sande, P., Hopster, K., Kästner, S. [Effects of morphine, butorphanol and levomethadone in different doses on thermal nociceptive thresholds in horses] Tierarztl Prax Ausg G Grosstiere Nutztiere 45: 98-106, 2017.Ambrisko, T. D., Schramel, J., Hopster, K., Kästner, S., Moens, Y. Assessment of distribution of ventilation and regional lung compliance by electrical impedance tomography in anaesthetized horses undergoing alveolar recruitment manoeuvres Vet Anaesth Analg 44: 264-272, 2017.Hopster K, Wittenberg-Voges L, Geburek F, Hopster-Iversen C, Kästner SBR Effects of controlled hypoxemia or hypovolemia on global and intestinal oxygenation and perfusion in anesthetized horses. BMC Vet Res 28;13(1): 361, 2017.Hopster K, Ambrisko TD, Kästner SBR Influence of catecholamines at different dosages on the function of the LiDCO sensor in isoflurane anesthetized horses. J Vet Emerg Crit Care (San Antonio) : 24, 2017.Hopster, K., Ambrisko, T. D., Kästner, S. B. R. Influence of catecholamines at different dosages on the function of the LiDCO sensor in isoflurane anesthetized horses J Vet Emerg Crit Care (San Antonio) 27: 651-657, 2017.Müller, T. M., Hopster, K., Bienert-Zeit, A., Rohn, K., Kästner, S. B. R. Effect of butorphanol, midazolam or ketamine on romifidine based sedation in horses during standing cheek tooth removal BMC Vet Res 13: 381, 2017.Hopster, K., Wittenberg-Voges, L., Kästner, S. B. R. Xylazine infusion in isoflurane-anesthetized and ventilated healthy horses: Effects on cardiovascular parameters and intestinal perfusion Can J Vet Res 81: 249-254, 2017.Yavari, S., Khraim, N., Szura, G., Starke, A., Engelke, E., Pfarrer, C., Hopster, K., Schmicke, M., Kehler, W., Heppelmann, M., Kästner, S. B. R., Rehage, J. Evaluation of intravenous regional anaesthesia and four-point nerve block efficacy in the distal hind limb of dairy cows BMC Vet Res 13: 320, 2017.Rieder, C. M., Staszyk, C., Hopster, K., Feige, K., Bienert-Zeit, A. Maxillary nerve block within the equine pterygopalatine fossa with different volumes: practicability, efficacy and side-effects Pferdeheilkunde 32: 132-140, 2016.Tünsmeyer, J., Hopster, K., Kästner, S. B. Clinical Use of a Multivariate Electroencephalogram (Narcotrend) for Assessment of Anesthetic Depth in Horses during Isoflurane-Xylazine Anesthesia Front Vet Sci 3: 25, 2016.Hopster, K., Jacobson, B., Hopster-Iversen, C., Rohn, K., Kästner, S. B. Histopathological changes and mRNA expression in lungs of horses after inhalation anaesthesia with different ventilation strategies Res Vet Sci 107: 8-15, 2016.Hopster, K., Rohn, K., Ohnesorge, B., Kästner, S. B. Controlled mechanical ventilation with constant positive end-expiratory pressure and alveolar recruitment manoeuvres during anaesthesia in laterally or dorsally recumbent horses Vet Anaesth Analg : , 2016.Hopster, K., Wogatzki, A., Conze, P., Kästner, S. B. Effects of positive end-expiratory pressure titration on intestinal oxygenation and perfusion in isoflurane anaesthetised horses Equine Vet J : , 2016.Pöppel, N., Hopster, K., Geburek, F., Kästner, S. Influence of ketamine or xylazine supplementation on isoflurane anaesthetized horses--a controlled clinical trial Vet Anaesth Analg 42: 30-38, 2015.Hopster, K., Hopster-Iversen, C., Geburek, F., Rohn, K., Kästner, S. B. Temporal and concentration effects of isoflurane anaesthesia on intestinal tissue oxygenation and perfusion in horses Vet J 205: 62-68, 2015.Hopster, K., Ambrisko, T. D., Stahl, J., Schramel, J. P., Kästner, S. B. Influence of xylazine on the function of the LiDCO sensor in isoflurane anaesthetized horses Vet Anaesth Analg 42: 142-149, 2015.Tünsmeyer, J., Hopster, K., Feige, K., Kästner, S. B. Agreement of high definition oscillometry with direct arterial blood pressure measurement at different blood pressure ranges in horses under general anaesthesia Vet Anaesth Analg 42: 286-291, 2015.Conze, P., van Schie, H. T., van Weeren, R., Staszyk, C., Conrad, S., Skutella, T., Hopster, K., Rohn, K., Stadler, P., Geburek, F. Effect of autologous adipose tissue-derived mesenchymal stem cells on neovascularization of artificial equine tendon lesions Regen Med 9: 743-757, 2014.Gozalo-Marcilla, M., Hopster, K., Gasthuys, F., Krajewski, A. E., Schwarz, A., Schauvliege, S. Minimum end-tidal sevoflurane concentration necessary to prevent movement during a constant rate infusion of morphine, or morphine plus dexmedetomidine in ponies Vet Anaesth Analg 41: 212-219, 2014.Hopster, K., Müller, C., Hopster-Iversen, C., Stahl, J., Rohn, K., Kästner, S. Effects of dexmedetomidine and xylazine on cardiovascular function during total intravenous anaesthesia with midazolam and ketamine and recovery quality and duration in horses Vet Anaesth Analg 41: 25-35, 2014.Reichert, C., Kästner, S. B., Hopster, K., Rohn, K., Rötting, A. K. Use of micro-lightguide spectrophotometry for evaluation of microcirculation in the small and large intestines of horses without gastrointestinal disease Am J Vet Res 75: 990-996, 2014.Hopster-Iversen, C. C., Hopster, K., Staszyk, C., Rohn, K., Freeman, D. E., Rötting, A. K. Effects of experimental mechanical manipulations on local inflammation in the jejunum of horses Am J Vet Res 75: 385-391, 2014.Poller, C., Hopster, K., Rohn, K., Kästner, S. B. Nociceptive thermal threshold testing in horses - effect of neuroleptic sedation and neuroleptanalgesia at different stimulation sites BMC Vet Res 9: 135, 2013.Poller, C., Hopster, K., Rohn, K., Kästner, S. B. Evaluation of contact heat thermal threshold testing for standardized assessment of cutaneous nociception in horses - comparison of different locations and environmental conditions BMC Vet Res 9: 4, 2013.Hopster, K., Ohnesorge, B., von Borstel, M., Rohn, K., Kästner, S. [Influence of atracurium on cardiovascular parameters in horses undergoing vitrectomy during general anaesthesia, and on recovery duration and quality] Tierarztl Prax Ausg G Grosstiere Nutztiere 41: 371-377, 2013.Gozalo-Marcilla, M., Hopster, K., Gasthuys, F., Hatz, L., Krajewski, A. E., Schauvliege, S. Effects of a constant-rate infusion of dexmedetomidine on the minimal alveolar concentration of sevoflurane in ponies Equine Vet J 45: 204-208, 2013.Hopster, K., Bienert-Zeit, A., Hopster-Iversen, C., Kästner, S. B. R. Influence of ketamine or midazolam in combination with a romifidine-butorphanol-constant rate infusion on sedation quality during tooth extraction in standing horses Pferdeheilkunde 29: 220-227, 2013.Tappenbeck, K., Hoppe, S., Hopster, K., Kietzmann, M., Feige, K., Huber, K. Lidocaine and structure-related mexiletine induce similar contractility-enhancing effects in ischaemia-reperfusion injured equine intestinal smooth muscle in vitro Vet J 196: 461-466, 2013.Tappenbeck, K., Hoppe, S., Hopster, K., Kietzmann, M., Feige, K., Huber, K. Influence of structural and lipophilic characteristics of lidocaine on its prokinetic effect in intestinal smooth muscle Journal Of Veterinary Pharmacology And Therapeutics 35: 145-146, 2012.Müller, C., Hopster, K., Hopster-lversen, C., Rohn, K., Kästner, S. B. R. Elaboration of a xylazine and dexmedetomidine infusion regime which provides a constant level of sedation in horses Pferdeheilkunde 28: 668-674, 2012.