KLAUS HOPSTER
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New Bolton Center Kennett Square, PA
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610-444-5800
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Ryan Hospital Philadelphia, PA
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215-746-8911
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215-746-8387
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KLAUS HOPSTER, DMV, DrMedVet

Diplomate, European College of Veterinary Anesthesia and Analgesia

Board Certification in Anesthesiology and Intensive Care, German Veterinary Medical Association

Associate Professor of Large Animal Anesthesiology, New Bolton Center, University of Pennsylvania School of Veterinary Medicine
Contact Information:
University of Pennsylvania
School of Veterinary Medicine
Department of Clinical Studies-NBC
382 West Street Road

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.

DMV (Veterinary Medicine) University of Veterinary Medicine Hannover, 2006

DrMedVet (Veterinary Medicine) School of Veterinary Medicine Hannover, 2007

Diplomate, European College of Veterinary Anesthesia and Analgesia

Board Certification in Anesthesiology and Intensive Care, German Veterinary Medical Association

Clinic of Horses, School of Veterinary Medicine Hannover, Germany (2006 to 2007)
Rotating Internship

Veterinary Anaesthesia and Analgesia at the School of Veterinary Medicine Hannover, Germany (2007 to 2011)
Residency