The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
D. Joseph - One of the best experts on this subject based on the ideXlab platform.
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Vomiting, retching, headache and restlessness after halothane‐, isoflurane‐ and enflurane‐based anaesthesia: An analysis of pooled data following ear, nose, throat and Eye Surgery
Acta Anaesthesiologica Scandinavica, 1998Co-Authors: A. A. Van Den Berg, N. M. Honjol, T. Mphanza, C. J. Rozario, D. JosephAbstract:Background: Isoflurane has exceeded halothane and enflurane in usage. A literature search, however, revealed no data comparing the effects on emesis, headache and restlessness of these three agents. Methods: With hospital ethics committee approval and patient consent, a prospective, randomised, double-blind study of 556 patients undergoing ENT and Eye Surgery was undertaken to evaluate the effects of halothane, isoflurane and enflurane on vomiting, retching, headache and restlessness until 24 h after anaesthesia. Balanced general anaesthesia was administered comprising benzodiazepine premedication, induction with thiopentone-atracurium-morphine (ENT patients) or fentanyl (Eye patients), controlled ventilation and maintenance with either halothane 0.4–0.6 vol% (n = 186), isoflurane 0.6–0.8 vol% (n = 184) or enflurane 0.8–1 vol% (n=186) in nitrous oxide 67% and oxygen. Results: The three study groups were comparable, and comprised comparable subgroups having ear, nose, throat, intraocular and non-intraocular Surgery. During early recovery from anaesthesia, the respective requirements for halothane, isoflurane and enflurane for analgesia (7%, 9% and 10%), frequency of emesis (6%, 8% and 8%), antiemetic requirements (1%, 1% and 2%), restlessness-pain scores and time spent in the recovery ward (27 SD 10, 31 SD 12 and 26 SD 9 min) were similar. During the ensuing 24-h postoperative period, patients who had isoflurane experienced emesis less often than those who had halothane (36% vs 46%, P
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vomiting retching headache and restlessness after halothane isoflurane and enflurane based anaesthesia an analysis of pooled data following ear nose throat and Eye Surgery
Acta Anaesthesiologica Scandinavica, 1998Co-Authors: A. A. Van Den Berg, N. M. Honjol, T. Mphanza, C. J. Rozario, D. JosephAbstract:Background: Isoflurane has exceeded halothane and enflurane in usage. A literature search, however, revealed no data comparing the effects on emesis, headache and restlessness of these three agents. Methods: With hospital ethics committee approval and patient consent, a prospective, randomised, double-blind study of 556 patients undergoing ENT and Eye Surgery was undertaken to evaluate the effects of halothane, isoflurane and enflurane on vomiting, retching, headache and restlessness until 24 h after anaesthesia. Balanced general anaesthesia was administered comprising benzodiazepine premedication, induction with thiopentone-atracurium-morphine (ENT patients) or fentanyl (Eye patients), controlled ventilation and maintenance with either halothane 0.4–0.6 vol% (n = 186), isoflurane 0.6–0.8 vol% (n = 184) or enflurane 0.8–1 vol% (n=186) in nitrous oxide 67% and oxygen. Results: The three study groups were comparable, and comprised comparable subgroups having ear, nose, throat, intraocular and non-intraocular Surgery. During early recovery from anaesthesia, the respective requirements for halothane, isoflurane and enflurane for analgesia (7%, 9% and 10%), frequency of emesis (6%, 8% and 8%), antiemetic requirements (1%, 1% and 2%), restlessness-pain scores and time spent in the recovery ward (27 SD 10, 31 SD 12 and 26 SD 9 min) were similar. During the ensuing 24-h postoperative period, patients who had isoflurane experienced emesis less often than those who had halothane (36% vs 46%, P<0.025) but did so with similar frequency to those who had enflurane (46% vs 41%). Antiemetic requirements were least in those given isoflurane (isoflurane 12%, halothane and enflurane 23% each, P<0.005), but headache and analgesic requirements were similar. Conclusion: Isoflurane induces less postoperative emesis than halothane, but headache is similarly frequent after anaesthesia with any of these agents.
Mohammed A Majid - One of the best experts on this subject based on the ideXlab platform.
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The Video Atlas Of Eye Surgery—Vitreoretinal (Part 1)
British Journal of Ophthalmology, 2006Co-Authors: Mohammed A MajidAbstract:B C Little, Aylward B, Packer M, and et al. London: DVD $405, 2006, ISBN 19-053-1200-8 Vitreoretinal 1 — Basic Techniques is the second in the series of this video based Video Atlas of Eye Surgery . The presentation is similar to the Phacoemulsification 1 — Basic Techniques . It is supplied on a single DVD, being PC or Mac compatible. The standard Video Atlas interface is used with chapters being presented on the right hand side of the main screen. These are easily collapsible or expanded to reveal the subsections and each video is, therefore, directly accessible from the main menu. The “Learning Pad” is again presented …
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The Video Atlas Of Eye Surgery—Phacoemulsification (Part 1)
British Journal of Ophthalmology, 2006Co-Authors: Mohammed A MajidAbstract:B C Little, Aylward B, Packer M, and et al. London: DVD $405, 2006, ISBN 19-053-1201-6 Phacoemulsification 1 — Basic Techniques is the first in a series of DVDs forming the complete Video Atlas of Eye Surgery . The atlas will consist of five sections: phacoemulsification, vitreoretinal, glaucoma, refractive and orbital, lacrimal and lids. Each section is planned to have three subsections, concentrating on (1) basic techniques, (2) challenging cases, and (3) complications. The authors are a well respected international group of experienced ophthalmologists. They aim to provide a comprehensive and structured surgical training programme based on their experience of the topics presented. Their …
Iulian Iordachita - One of the best experts on this subject based on the ideXlab platform.
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toward improving patient safety and surgeon comfort in a synergic robot assisted Eye Surgery a comparative study
Intelligent Robots and Systems, 2019Co-Authors: Ali Ebrahimi, Peter L Gehlbach, Farshid Alambeigi, Ingrid Zimmergaller, Russell H Taylor, Iulian IordachitaAbstract:When robotic assistance is present into vitreoretinal Surgery, the surgeon will experience reduced sensory input that is otherwise derived from the tool’s interaction with the Eye wall (sclera). We speculate that disconnecting the surgeon from this sensory input may increase the risk of injury to the Eye and affect the surgeon’s usual technique. On the other hand, robot autonomous motion to enhance patient safety might inhibit the surgeons tool manipulation and diminish surgeon comfort with the procedure. In this study, to investigate the parameters of patient safety and surgeon comfort in a robot-assisted Eye Surgery, we implemented three different approaches designed to keep the scleral force in a safe range during a synergic Eye manipulation task. To assess the surgeon comfort during these procedures, the amount of interference with the surgeons usual maneuvers has been analyzed by defining quantitative comfort metrics. The first two utilized scleral force control approaches are based on an adaptive force control method in which the robot actively counteracts any excessive force on the sclera. The third control method is based on a virtual fixture approach in which a virtual wall is created for the surgeon in the unsafe directions of manipulation. The performance of the utilized approaches was evaluated in user studies with two experienced retinal surgeons and the outcomes of the procedure were assessed using the defined safety and comfort metrics. Results of these analyses indicate the significance of the opted control paradigm on the outcome of a safe and comfortable robot-assisted Eye Surgery.
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sclera force control in robot assisted Eye Surgery adaptive force control vs auditory feedback
International Symposium Medical Robotics, 2019Co-Authors: Ali Ebrahimi, Niravkumar Patel, Peter L Gehlbach, Marin Kobilarov, Iulian IordachitaAbstract:Surgeon hand tremor limits human capability during microsurgical procedures such as those that treat the Eye. In contrast, elimination of hand tremor through the introduction of microsurgical robots diminishes the surgeons tactile perception of useful and familiar tool-to-sclera forces. While the large mass and inertia of Eye surgical robot prevents surgeon microtremor, loss of perception of small scleral forces may put the sclera at risk of injury. In this paper, we have applied and compared two different methods to assure the safety of sclera tissue during robot-assisted Eye Surgery. In the active control method, an adaptive force control strategy is implemented on the Steady-Hand Eye Robot in order to control the magnitude of scleral forces when they exceed safe boundaries. This autonomous force compensation is then compared to a passive force control method in which the surgeon performs manual adjustments in response to the provided audio feedback proportional to the magnitude of sclera force. A pilot study with three users indicate that the active control method is potentially more efficient.
A. A. Van Den Berg - One of the best experts on this subject based on the ideXlab platform.
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Vomiting, retching, headache and restlessness after halothane‐, isoflurane‐ and enflurane‐based anaesthesia: An analysis of pooled data following ear, nose, throat and Eye Surgery
Acta Anaesthesiologica Scandinavica, 1998Co-Authors: A. A. Van Den Berg, N. M. Honjol, T. Mphanza, C. J. Rozario, D. JosephAbstract:Background: Isoflurane has exceeded halothane and enflurane in usage. A literature search, however, revealed no data comparing the effects on emesis, headache and restlessness of these three agents. Methods: With hospital ethics committee approval and patient consent, a prospective, randomised, double-blind study of 556 patients undergoing ENT and Eye Surgery was undertaken to evaluate the effects of halothane, isoflurane and enflurane on vomiting, retching, headache and restlessness until 24 h after anaesthesia. Balanced general anaesthesia was administered comprising benzodiazepine premedication, induction with thiopentone-atracurium-morphine (ENT patients) or fentanyl (Eye patients), controlled ventilation and maintenance with either halothane 0.4–0.6 vol% (n = 186), isoflurane 0.6–0.8 vol% (n = 184) or enflurane 0.8–1 vol% (n=186) in nitrous oxide 67% and oxygen. Results: The three study groups were comparable, and comprised comparable subgroups having ear, nose, throat, intraocular and non-intraocular Surgery. During early recovery from anaesthesia, the respective requirements for halothane, isoflurane and enflurane for analgesia (7%, 9% and 10%), frequency of emesis (6%, 8% and 8%), antiemetic requirements (1%, 1% and 2%), restlessness-pain scores and time spent in the recovery ward (27 SD 10, 31 SD 12 and 26 SD 9 min) were similar. During the ensuing 24-h postoperative period, patients who had isoflurane experienced emesis less often than those who had halothane (36% vs 46%, P
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vomiting retching headache and restlessness after halothane isoflurane and enflurane based anaesthesia an analysis of pooled data following ear nose throat and Eye Surgery
Acta Anaesthesiologica Scandinavica, 1998Co-Authors: A. A. Van Den Berg, N. M. Honjol, T. Mphanza, C. J. Rozario, D. JosephAbstract:Background: Isoflurane has exceeded halothane and enflurane in usage. A literature search, however, revealed no data comparing the effects on emesis, headache and restlessness of these three agents. Methods: With hospital ethics committee approval and patient consent, a prospective, randomised, double-blind study of 556 patients undergoing ENT and Eye Surgery was undertaken to evaluate the effects of halothane, isoflurane and enflurane on vomiting, retching, headache and restlessness until 24 h after anaesthesia. Balanced general anaesthesia was administered comprising benzodiazepine premedication, induction with thiopentone-atracurium-morphine (ENT patients) or fentanyl (Eye patients), controlled ventilation and maintenance with either halothane 0.4–0.6 vol% (n = 186), isoflurane 0.6–0.8 vol% (n = 184) or enflurane 0.8–1 vol% (n=186) in nitrous oxide 67% and oxygen. Results: The three study groups were comparable, and comprised comparable subgroups having ear, nose, throat, intraocular and non-intraocular Surgery. During early recovery from anaesthesia, the respective requirements for halothane, isoflurane and enflurane for analgesia (7%, 9% and 10%), frequency of emesis (6%, 8% and 8%), antiemetic requirements (1%, 1% and 2%), restlessness-pain scores and time spent in the recovery ward (27 SD 10, 31 SD 12 and 26 SD 9 min) were similar. During the ensuing 24-h postoperative period, patients who had isoflurane experienced emesis less often than those who had halothane (36% vs 46%, P<0.025) but did so with similar frequency to those who had enflurane (46% vs 41%). Antiemetic requirements were least in those given isoflurane (isoflurane 12%, halothane and enflurane 23% each, P<0.005), but headache and analgesic requirements were similar. Conclusion: Isoflurane induces less postoperative emesis than halothane, but headache is similarly frequent after anaesthesia with any of these agents.
Ali Ebrahimi - One of the best experts on this subject based on the ideXlab platform.
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toward improving patient safety and surgeon comfort in a synergic robot assisted Eye Surgery a comparative study
Intelligent Robots and Systems, 2019Co-Authors: Ali Ebrahimi, Peter L Gehlbach, Farshid Alambeigi, Ingrid Zimmergaller, Russell H Taylor, Iulian IordachitaAbstract:When robotic assistance is present into vitreoretinal Surgery, the surgeon will experience reduced sensory input that is otherwise derived from the tool’s interaction with the Eye wall (sclera). We speculate that disconnecting the surgeon from this sensory input may increase the risk of injury to the Eye and affect the surgeon’s usual technique. On the other hand, robot autonomous motion to enhance patient safety might inhibit the surgeons tool manipulation and diminish surgeon comfort with the procedure. In this study, to investigate the parameters of patient safety and surgeon comfort in a robot-assisted Eye Surgery, we implemented three different approaches designed to keep the scleral force in a safe range during a synergic Eye manipulation task. To assess the surgeon comfort during these procedures, the amount of interference with the surgeons usual maneuvers has been analyzed by defining quantitative comfort metrics. The first two utilized scleral force control approaches are based on an adaptive force control method in which the robot actively counteracts any excessive force on the sclera. The third control method is based on a virtual fixture approach in which a virtual wall is created for the surgeon in the unsafe directions of manipulation. The performance of the utilized approaches was evaluated in user studies with two experienced retinal surgeons and the outcomes of the procedure were assessed using the defined safety and comfort metrics. Results of these analyses indicate the significance of the opted control paradigm on the outcome of a safe and comfortable robot-assisted Eye Surgery.
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sclera force control in robot assisted Eye Surgery adaptive force control vs auditory feedback
International Symposium Medical Robotics, 2019Co-Authors: Ali Ebrahimi, Niravkumar Patel, Peter L Gehlbach, Marin Kobilarov, Iulian IordachitaAbstract:Surgeon hand tremor limits human capability during microsurgical procedures such as those that treat the Eye. In contrast, elimination of hand tremor through the introduction of microsurgical robots diminishes the surgeons tactile perception of useful and familiar tool-to-sclera forces. While the large mass and inertia of Eye surgical robot prevents surgeon microtremor, loss of perception of small scleral forces may put the sclera at risk of injury. In this paper, we have applied and compared two different methods to assure the safety of sclera tissue during robot-assisted Eye Surgery. In the active control method, an adaptive force control strategy is implemented on the Steady-Hand Eye Robot in order to control the magnitude of scleral forces when they exceed safe boundaries. This autonomous force compensation is then compared to a passive force control method in which the surgeon performs manual adjustments in response to the provided audio feedback proportional to the magnitude of sclera force. A pilot study with three users indicate that the active control method is potentially more efficient.
