The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In recent years, minimally invasive surgery (MIS) has been developed in medical field. MIS is performed by inserting some tools such as forceps into holes made on a patient's body. MIS requires surgeons of skills and experiences because of the limited space to operate tools and the slight tactile sensation which the operator can feel through the forceps. To improve the performance of surgeons, this...
This paper presents a exact kinematics of the five degrees of freedom (DoF) surgical robot derived by the geometrical relation of the structure. In laparoscopic surgery, there are some advantages for patients because incision on abdominal wall is small. However, laparoscopic surgery is difficult for surgeons. Therefore, surgical robots with have been studied and developed to support surgeons. Conventional...
Motion-canceling bilateral control, a teleoperation method, is proposed and implemented for telesurgical robots. Telesurgical robots have difficulty in achieving control owing to a lack of haptic feedback and the beating motion of organs. Hence, this study aims to provide a surgeon with the means for feeling the tactile sensation of the remote organ, as well as synchronizing with its motion. Therefore,...
As the technology advances, almost all the fields of the society gets developed for the benefit of the mankind. Surgery is one such field where a lot of focus is made to develop the surgical tools and instruments for past couple of decades. As a result, the robot assisted minimal invasive surgeries are very popular in the modern world. Laparoscopic forceps robots are widely used in these types of...
2-DOF haptic surgical multi drive robot is driven by multi drive linear motors, and does not separate hand function (manipulating mode) and arm function (grasping mode) of the human motion mechanically. Conventional method has one problem. When the operator want to grasp an object, he have to drive forceps open. This make operator difficult to use forceps finely and powerfully. A proposed method separates...
This paper presents the technological achievements in realizing the force feedback in surgical robots. No force sensor is used in sensing the force. Disturbance observer and its variant, reaction torque observer is used to detect the force. Bilateral control is used to transmit vivid sensations from the forceps end to the surgeon.
In this paper, we discuss the issue of safety in robot-assisted fracture reduction. We define the hazards of robot-assisted fracture reduction and design safety control methods. Although a large reduction force is required to reduce femoral neck fractures, an unexpectedly large force produced by a robot may cause injury to the patient. We have designed two mechanical failsafe units and a software...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.