A DYNAMIC VIRTUAL HAND MODEL FOR ESTIMATING JOINT TORQUES DURING THE WRIST AND FINGERS MOVEMENTS

Determining the dynamic properties of the joints of human limbs is a control and design parameter for humanoid mechanism, rehabilitation robots and orthotic and prosthetic devices. In other researches, some methods have been suggested for estimating joint torques of the hand such as mathematical models and simulation models. A 16 degree of freedom (DOF) dynamic simulation model of an average human hand is suggested in this study. Dynamic model of a human hand has been created by SimMechanics on MATLAB. Abduction/adduction and flexion/extension motions of the wrist and the fingers can be analysed using SimMechanics model by changing joint rotation. The model has been analyzed by inverse dynamics method using the video record of five healthy subjects (31.2 ±9.57 years) and the joint torques of the wrist and fingers have been calculated. The greatest torque of index finger with 0.0149 Nm occurs at the MCP joint during the cylindrical grip. The greatest wrist torque has been calculated as 0.225 Nm during motion of flexion/extension. Our results are similar to previous works. This simulation model can be used for estimating the joint torques at different motions of the hand without external devices and mathematical techniques

Çocukluk çağı hemoglobinopatili hastalarda hepatit c virusu prevelansı

TEZ962Tez (Uzmanlık) -- Çukurova Üniversitesi, Adana, 1991.Kaynakça (s. 45-51) var.51 s. ; 30 cm.

Biomechanical effects of daily physical activities on the lower limb

Objective: The aim of this study was to determine the joint torques on the lower extremity during the daily physical activity movements of sit-to-stand, crouch down-stand up, and stair climbing without using an external device.Methods: The study subject was a healthy 26-year-old male without any physical problems. A linksegment model was prepared according to the subject's individual anthropometric characteristics and transferred to the MATLAB® program. Joint torques were calculated using SimMechanics(TM) software. Motions were recorded by one digital video camera as the subject performed the movements (sit-tostand from 20 cm and 40 cm height, crouch down-stand up, and climbing 10 cm and 20 cm high step) and the joint's position data was obtained using a digitization process. In addition, the vertical ground reaction forces were measured using a force plate in order to test the accuracy of the link-segment model. Lower extremity joint torques were calculated.Results: Maximum joint torques occurred in the knee joint. The knee and the ankle joints were the most loaded joint during the high step movement. The highest torques of the knee and ankle joint were 157.2 Nm and 146 Nm, respectively, during the movements. Knee joint torque and the ankle joint torque increased when the sitting height increased. The hip joint experienced the least amount of load during the movements.Conclusion: The knee joint has enough strength against high torques during extension and flexion movement. Joint torques can be successfully calculated using a simulation process involving an inverse dynamics method without an external device mounted on the limbs. The obtained data can be used in the design of prosthetics and orthotics and for structural analysis of the bone

The experience of BK polyoma virus infection treatment after allogeneic hematopoietic stem cell transplantation in pediatric patients

44th Annual Meeting of the European-Society-for-Blood-and-Marrow-Transplantation (EBMT) -- MAR 18-21, 2018 -- Lisbon, PORTUGALWOS: 000487702807050…European Soc Blood & Marrow Transplanta

The experience using of eltrombopag for treatment of thrombocytopenia after allogeneic hematopoetic stem cell transplantation in pediatric patients

44th Annual Meeting of the European-Society-for-Blood-and-Marrow-Transplantation (EBMT) -- MAR 18-21, 2018 -- Lisbon, PORTUGALWOS: 000487702807052…European Soc Blood & Marrow Transplanta

Compartment Syndrome Resulting from Carbon Monoxide Poisoning

Gurger, Murat/0000-0002-7510-7203WOS: 000369427700004PubMed: 26588033Every year, especially in the cooler Fall and Winter months, hundreds of people die because of carbon monoxide poisoning. This occurs usually as an accident. It is a significant cause of poisoning worldwide. We present a case of compartment syndrome in both lower extremities with accompanying acute renal failure and systemic capillary leakage syndrome because of carbon monoxide poisoning

VClosed reduction and intramedullary pinning in the treatment of adult radial neck

Gurger, Murat/0000-0002-7510-7203WOS: 000376638300003PubMed: 26309467Closed reduction and intramedullary pinning ( CIMP) in pediatric radial neck fractures was first reported by Metaizeau in 1980 andsatisfactory results have been published several times. The current literature did not encounter any publication related to the implementation of Metaizeau method to adult patients. We applied Metaizeau technique to an adult radial neck fracture and we have achieved satisfactory results. As this case report is single case of this method applied to an adult, we decided to present this case