New Bolton Center Kennett Square, PA
Emergencies & Appointments:
Ryan Hospital Philadelphia, PA


Assistant Professor of Large Animal Anesthesiology (CE), University of Pennsylvania School of Veterinary Medicine

Diplomate, European College of Veterinary Anesthesia and Analgesia

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

Contact Information:
University of Pennsylvania
School of Veterinary Medicine
Department of Clinical Studies-NBC
382 West Street Road

Kelley Varner & Klaus Hopster, Bernd Driessen Effects of an alveolar recruitment maneuver using 30% oxygen/ 70% helium (Heliox) or 30% oxygen / 70% nitrogen as fresh gas on pulmonary mechanics and gas exchange in dorsally recumbent anesthetized horses. Am J Vet Res : , 2019.

Hopster K, Bertone C, Driessen B Accuracy of tidal volume monitoring and delivery during equine anesthesia: a bench study testing two flow sensors and a piston-driven large animal ventilator. Am J Vet Res : , 2019.

Hopster K, Duffee L, Hopster-Iversen C, 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(10): 1021-1027, 2018.

Neudeck S, Kästner SBR, Wittenberg-Voges L, Hopster K Comparison of desflurane and propofol at equipotent dosages in combination with a constant-rate infusion of dexmedetomidine on global and peripheral perfusion and oxygenation in horses. Am J Vet Res : , 2018.

Wittenberg-Voges L, Kästner SBR, Raekallio M, Vainio OM, Hopster K Effect of dexmedetomidine and xylazine followed by MK-467 on gastrointestinal microperfusion in anaesthetized horses. Vet Anaesth Analg 45(2): 165-174, 2018.

Müller M, Hopster K, Bienert-Zeit A, Rohn K, Kästner SBR 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, 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, Dancker C, Rohn K, Kästner SB Effects of dobutamine, dopamine, phenylephrine and noradrenaline on systemic haemodynamics and intestinal perfusion in isoflurane anaesthetised horses. Equine Vet J. : 15, 2017.

Hopster K; Rohn K; Ohnesorge B; Kastner, SBR Controlled mechanical ventilation with constant positive end-expiratory pressure and alveolar recruitment manoeuvre during anaesthesia in laterally or dorsally recumbent horses. Vet Anaesth Analg 44(1): 121-126, 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.

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

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