The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform
Dong Kyu Chin - One of the best experts on this subject based on the ideXlab platform.
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Spine surgeon's kinematics during discectomy, part II: Operating Table height and visualization methods, including microscope.
European spine journal : official publication of the European Spine Society the European Spinal Deformity Society and the European Section of the Cerv, 2013Co-Authors: Jeong Yoon Park, Dong Kyu Chin, Kyung Hyun Kim, Sung Uk Kuh, Keun Su Kim, Yong Eun ChoAbstract:Purpose Surgeon spine angle during surgery was studied ergonomically and the kinematics of the surgeon’s spine was related with musculoskeletal fatigue and pain. Spine angles varied depending on operation Table height and visualization method, and in a previous paper we showed that the use of a loupe and a Table height at the midpoint between the umbilicus and the sternum are optimal for reducing musculoskeletal loading. However, no studies have previously included a microscope as a possible visualization method. The objective of this study is to assess differences in surgeon spine angles depending on Operating Table height and visualization method, including microscope.
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Spine surgeon’s kinematics during discectomy according to Operating Table height and the methods to visualize the surgical field
European Spine Journal, 2012Co-Authors: Jeong Yoon Park, Dong Kyu ChinAbstract:Purpose The ergonomic problems for surgeons during spine surgery are an awkward body posture, repetitive movements, increased muscle activity, an overflexed spine, and a protracted time in a standing posture. The authors analyzed whole spine angles during discectomy. The objective of this study is to assess differences in surgeon whole spines angles according to Operating Table height and the methods used to visualize surgical field.
Jeong Yoon Park - One of the best experts on this subject based on the ideXlab platform.
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Spine surgeon's kinematics during discectomy, part II: Operating Table height and visualization methods, including microscope.
European spine journal : official publication of the European Spine Society the European Spinal Deformity Society and the European Section of the Cerv, 2013Co-Authors: Jeong Yoon Park, Dong Kyu Chin, Kyung Hyun Kim, Sung Uk Kuh, Keun Su Kim, Yong Eun ChoAbstract:Purpose Surgeon spine angle during surgery was studied ergonomically and the kinematics of the surgeon’s spine was related with musculoskeletal fatigue and pain. Spine angles varied depending on operation Table height and visualization method, and in a previous paper we showed that the use of a loupe and a Table height at the midpoint between the umbilicus and the sternum are optimal for reducing musculoskeletal loading. However, no studies have previously included a microscope as a possible visualization method. The objective of this study is to assess differences in surgeon spine angles depending on Operating Table height and visualization method, including microscope.
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Spine surgeon’s kinematics during discectomy according to Operating Table height and the methods to visualize the surgical field
European Spine Journal, 2012Co-Authors: Jeong Yoon Park, Dong Kyu ChinAbstract:Purpose The ergonomic problems for surgeons during spine surgery are an awkward body posture, repetitive movements, increased muscle activity, an overflexed spine, and a protracted time in a standing posture. The authors analyzed whole spine angles during discectomy. The objective of this study is to assess differences in surgeon whole spines angles according to Operating Table height and the methods used to visualize surgical field.
Steven Roth - One of the best experts on this subject based on the ideXlab platform.
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Operating Table failure another hazard of spine surgery
Anesthesia & Analgesia, 2009Co-Authors: Martin H Dauber, Steven RothAbstract:A patient fell from a Jackson Spine Table during an anesthetic. Spine surgery involving fusion and instrumentation often requires specialized Operating room Tables. The Jackson Spinal Table has several stated advantages, including ease of positioning, particularly for obese patients, and the ability to turn the patient to prone and supine positions. We encountered a serious hazard with the Jackson Spinal Table, which exposes patients to potentially serious injury. The Table design renders it difficult to easily identify when it is locked, and therefore a patient may be prone to falling off the Table.
S Davis - One of the best experts on this subject based on the ideXlab platform.
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an ergonomic study of the optimum Operating Table height for laparoscopic surgery
Surgical Endoscopy and Other Interventional Techniques, 2002Co-Authors: R Berquer, Warren D Smith, S DavisAbstract:Background: Laparoscopic surgery requires the use of longer instruments than open surgery, thus changing the relation between the height of the surgeon's hands and the desirable height of the Operating room Table. The optimum height of the Operating room Table for laparoscopic surgery is investigated in this study. Methods: Twenty-one surgeons performed a two-handed, one-fourth circle cutting task using a laparoscopic video system and laparoscopic instruments positioned at five instrument handle heights relative to subjects' elbow height (?20, ?10, 0, +10, and +20 cm) by adjusting the height of the trainer box. Subjects rated the difficulty and discomfort experienced during each task on a visual analog scale. Skin conductance (SC) was measured in Micromhos via paired surface electrodes placed near the ulnar edge of the palm of the right (cutting) hand. The mean electromyographic (EMG) signal from the right deltoid and trapezius muscles was measured. Arm orientation was measured in three dimensions using a magnetometer/accelerometer. Signals were acquired using analog circuitry and digitally sampled using a National Instruments DAQCard 700 connected to a Macintosh PowerBook 5300c running LabVIEW software. Statistical analysis was carried out by analysis of variance and post hoc testing. Results: Statistically significant changes were found in the subjective rating of discomfort (p <0.002), deltoid EMG (p <0.0006), trapezius EMG (p <0.0001), and arm elevation (p <0.0001) between instrument handle heights. SC values and task times did not change significantly. Discomfort and difficulty ratings were lowest when instrument handles were positioned at elbow height. EMG values and arm elevation all decreased with lower instrument height. Conclusion: This study suggests that the optimum Table height for laparoscopic surgery should position the laparoscopic instrument handles close to surgeons' elbow level to minimize discomfort and upper arm and shoulder muscle work. This corresponds to an approximate Table height of 64 to 77 cm above floor level. A redesign of current Operating room Tables may be required to meet these ergonomic guidelines.
Nassir Navab - One of the best experts on this subject based on the ideXlab platform.
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MIAR - Modeling kinematics of mobile C-arm and Operating Table as an integrated six degrees of freedom imaging system
Lecture Notes in Computer Science, 2010Co-Authors: Lejing Wang, Rui Zou, Simon Weidert, Juergen Landes, Ekkehard Euler, Darius Burschka, Nassir NavabAbstract:Maneuvering mobile C-arms to a desired position and orientation during surgery is not only a routine surgical task, e.g. for C-arm repositioning, but also an indispensable step for advanced X-ray imaging techniques, e.g. parallax-free X-ray image stitching. Standard mobile C-arms have only five degrees of freedom (DOF), which definitely restricts their motions that have six DOF in 3D Cartesian space. In this paper, we enable the mobile C-arm to have six DOF relative to the patient's Table by integrating a translational movement of the patient's Table into the mobile C-arm kinematics. We present a novel method to model the kinematics of the mobile C-arm and Operating Table as an integrated 6DOF C-arm X-ray imaging system. Kinematic singularities of the 6DOF C-arm model are determined by analyzing its manipulator Jacobian matrix. Inverse kinematic analysis is employed in order to find the required joint values to move the C-arm into the desired position and orientation. Our proposed 6DOF C-arm modeling paves the way for advanced applications in the fields of surgical navigation and advanced X-ray imaging that require C-arms to be precisely positioned or repositioned relative to the patient's Table with six DOF. In our implementation, we employ a visual planar marker pattern and a standard mobile C-arm augmented by a video camera in order to obtain a relationship between the C-arm system and the patient's Table. C-arm repositioning experiments on phantom study demonstrate the practicality and accuracy of our developed 6DOF C-arm system, and show the improved accuracy of C-arm repositioning by using the 6DOF C-arm model over the 5DOF C-arm model.
