[Virtual training in head- and neurosurgery].
ABSTRACT Surgical skill requires training at close-to-reality scenarios. Conventional procedures (practical exercises, anatomical or animal cadavers) are increasingly in conflict with objective parameters (costs of OR, quality management, cadavers availability and cost). Surgical procedures can be covered by using Virtual Surgical Reality (VSR).
We examined the principle of a VSR system and evaluated the results with 30 probands by the example of modified radical mastoidectomy and ventriculocisternostomy. Probands were divided in experienced (A) and non-experienced surgeons (B). The protocol included time of surgery, collisions and fatal injuries at altogether 15 passages (10 passages - break of 14 days - 5 passages). Additionally the Medical Level of Trust (LOT) describes the confidence into the surgical scenario and thus the quality by volume illustration, texture and haptic data feedback to the user. We used a numeric scale between 0 and 100 and the starting point of 50.
The learning effect can be confirmed for both virtual scenarios. The mastoid scenario reaches a total confidence index LOT of 75. The ventricle scenario is evaluated with a total confidence index of 84. The necessary time for the opening of the antrum is reduced from 15.0 minutes (group A) and 22.5 minutes (group B) around 37 % to 9, 5 (group A) and around 56 % to 10.0 minutes (group B). The virtual haptic result was evaluated positive in both scenarios.
VSR systems have the potential to revolutionize surgical training. All surgical experienced probands evaluated the VSR-scenario as near-to-reality. "Suspension of Disbelief" is the major condition for effective virtual reality training systems.
- SourceAvailable from: Hani R Malone[Show abstract] [Hide abstract]
ABSTRACT: Computer-based surgical simulators create a no-risk virtual environment where surgeons can develop and refine skills through harmless repetition. These applications may be of particular benefit to neurosurgeons, as the vulnerability of nervous tissue limits the margin for error. The rapid progression of computer-processing capabilities in recent years has led to the development of more sophisticated and realistic neurosurgery simulators. To catalogue the most salient of these advances and characterize our current effort to create a spine surgery simulator. An extensive search of the databases Ovid-MEDLINE, PubMed, and Google Scholar was conducted. Search terms included, but were not limited to: neurosurgery combined with simulation, virtual reality, haptics, and 3-dimensional imaging. A survey of the literature reveals that surgical simulators are evolving from platforms used for preoperative planning and anatomic education into programs that aim to simulate essential components of key neurosurgical procedures. This evolution is predicated upon the advancement of 3 main components of simulation: graphics/volume rendering, model behavior/tissue deformation, and haptic feedback. The computational burden created by the integration of these complex components often limits the fluidity of real-time interactive simulators. Although haptic interfaces have become increasingly sophisticated, the production of realistic tactile sensory feedback remains a formidable and costly challenge. The rate of future progress may be contingent upon international collaboration between research groups and the establishment of common simulation platforms. Given current limitations, the most potential for growth lies in the innovative design of models that expand the procedural applications of neurosurgery simulation environments.Neurosurgery 10/2010; 67(4):1105-16. DOI:10.1227/NEU.0b013e3181ee46d0 · 3.03 Impact Factor
Article: Auricular prosthesis-a case report.[Show abstract] [Hide abstract]
ABSTRACT: Loss of facial organs in an individual may be developmental anomalies or acquired. The missing parts of the face ear, eyes and nose are considered as maxillofacial defects which can be rehabilitated by the prosthesis and/or cosmetic surgeries. This art of science has developed into a more reliable and predictable process due to ever increasing development of materials and equipments used in the procedure. This article describes a simple technique to rehabilitate patients with auricular defects which are both aesthetically acceptable and economical for the individual.01/2014; 8(1):294-6. DOI:10.7860/JCDR/2014/7943.3986
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ABSTRACT: Haptics, or touchsense haptic technology is a major breakthrough in medical and dental interventions. Haptic perception is the process of recognizing objects through touch. Haptic sensations are created by actuators or motors which generate vibrations to the users and are controlled by embedded software which is integrated into the device. It takes the advantage of a combination of somatosensory pattern of skin and proprioception of hand position. Anatomical and diagnostic knowledge, when it is combined with this touch sense technology, has revolutionized medical education. This amalgamation of the worlds of diagnosis and surgical intervention adds precise robotic touch to the skill of the surgeon. A systematic literature review was done by using MEDLINE, GOOGLE SEARCH AND PubMed. The aim of this article was to introduce the fundamentals of haptic technology, its current applications in medical training and robotic surgeries, limitations of haptics and future aspects of haptics in medicine.03/2014; 8(3):294-299. DOI:10.7860/JCDR/2014/7814.4191