ABSTRACT
The preoperative planning of complex craniofacial surgical interventions is increasingly realized with the aid of appropriate planning systems in order to achieve high precision, minimal invasion and protection of risk areas. But the most important step from the planning to the actual intervention consists of providing the planning data intraoperatively in a reasonable and easy to handle way. In this regard, augmented reality is one of the most challenging and promising techniques to solve this problem. In this paper we present two different systems based on see-through glasses resp. a common video projector to directly visualize the planning data in the surgeon's field of view. The work is funded by the 'Deutsche Forschungsgemeinschaft (DFG)' and Stryker Leibinger Freiburg/Germany.
Subject(s)
Head/surgery , Imaging, Three-Dimensional , Robotics/instrumentation , Surgery, Computer-Assisted/instrumentation , User-Computer Interface , Computer Simulation , Craniotomy/instrumentation , Humans , Magnetic Resonance Imaging/instrumentation , Phantoms, Imaging , Surgery, Oral/instrumentation , Tomography, X-Ray Computed/instrumentationSubject(s)
Computer Simulation , Photography/instrumentation , Robotics/instrumentation , Surgery, Computer-Assisted/instrumentation , Surgery, Oral/instrumentation , User-Computer Interface , Video Recording/instrumentation , Humans , Image Interpretation, Computer-Assisted , Microcomputers , Phantoms, ImagingABSTRACT
The Institute for Process Control and Robotics has developed a new system using projector based augmented reality for the intraoperative visualization of preoperatively defined surgical planning data. Projector based augmented reality in medical applications represents a new field of research and gives an alternative solution to the commonly used Head Mounted Display technology. Moreover, the projector is not only used for visualization, but also for registration of the patient without the usage of invasive fiducial techniques as e.g. screw markers or frames. Recent results showed an achieved accuracy of +/- 1.5 mm which roughly meets clinical demands.
Subject(s)
Data Display , Operating Room Information Systems , Patient Care Planning , Surgical Procedures, Operative , User-Computer Interface , Video Recording/instrumentation , Humans , MicrocomputersABSTRACT
In this paper a brief description of a computer and robotic aided surgery system is given with a detailed overview of the necessity to develop special tools for robotic surgery. The application range of this robotic system has been specially focused on the orthopaedics field and, more particularly, on the execution of osteotomies. It was therefore necessary to develop a new saw device which would meet medical and--from the robot system point of view--mechanical as well as functional requirements. After describing the device which was developed on the basis of these requirements, a detailed comparative study of off-the-shelf oscillating saws and the new device is given at the end of the paper.
Subject(s)
Osteotomy/instrumentation , Robotics/instrumentation , Therapy, Computer-Assisted , Equipment Design , Femur Head/surgery , Humans , In Vitro Techniques , Male , Middle Aged , Osteotomy/methods , Stress, Mechanical , Surface Properties , TemperatureABSTRACT
Los docentes en ciencias de la salud, en virtud de su formacion academica, carecen de metodologia y entrenamiento para realizar el proceso de ensenanza-aprendizaje como profesores de carrera y al realizar los examenes a los alumnos solo llevan el proposito de asignar calificaciones por lo que se han convertido en sucesos angustiantes para el alumno. Los examenes llamados tambien mediciones, tienen ventajes y desventajas, asi como indicaciones precisas. En el presente trabajo se revisa el examen de opcion multiple, con sus caracteristicas e indicaciones, haciendo hincapie en como mejorarlo, proporniendo por parte de los autores un ordenamiento para realizar preguntas en un examen de opcion multiple, asi como sugerencias para mejorar los reactivos, el analisis minimo estadistico que debe llevarse hasta la formacion de un banco de preguntas, sencillo y economico y al alcance de cualquier docente
Subject(s)
Education, Medical , Educational MeasurementABSTRACT
A neonate with oral lesions of pemphigus vulgaris is described. The diagnosis was confirmed by cytological examination of lesions, positive intercellular IgG staining of the acantholytic cells, and presence of pemphigus antibodies in his serum. At the time of delivery, the child's mother had active pemphigus vulgaris, and it is suggested that this was a case of passively transferred disease.
Subject(s)
Immunity, Maternally-Acquired , Pemphigus/congenital , Adolescent , Antibodies/analysis , Female , Humans , Infant, Newborn , Male , Maternal-Fetal Exchange , Pemphigus/immunology , Pemphigus/transmission , Pregnancy , Pregnancy Complications/immunologyABSTRACT
A case of congenital syphilis is reported. It deals with a three-month-old girl suffering from a nephropathy clinically characterized by edema, hematuria, severe proteinuria and slight renal insufficiency. On light an delectron microscopy, a mesangial proliferative and focal extracapillary proliferative glomerulonephritis with abundant intermembranoepithelial deposits was observed.
