416 research outputs found

    Effectiveness and Student Perceptions of Haptic Virtual Reality Simulation Training as an Instructional Tool in Pre-Clinical Paediatric Dentistry: A Pilot Pedagogical Study

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    Simulation training for invasive dental procedures is a core component of the pre-clinical dental curriculum. Besides conventional mannequin-based simulators, dental schools are now incorporating haptic virtual reality simulation (HVRS) devices to facilitate the transition of students from the simulated dental learning environment to the clinical settings. This study aimed to assess student performance and perceptions of HVRS training as a pedagogical tool in pre-clinical paediatric dentistry. After practicing the primary molar pulpotomy procedure on plastic teeth, participants were randomized into test and control groups. Test group students performed the same procedure on a HVRS device, namely the SIMtoCARE Dente®. Subsequently, both the test and control group students attended another conventional pulpotomy simulation session where the quality of their access outline and pulp chamber deroofing steps were evaluated on plastic teeth. After the control group students also experienced the HVRS, all study participants completed a perception questionnaire on their experience. No significant differences were found between the study and control group students for the quantitative parameters assessed. Although the students regarded HVRS to be a useful adjunct to support their pre-clinical training, an overwhelming majority of the students did not consider HVRS to be a replacement for conventional pre-clinical simulation training

    Students’ Perceptions of Using Simulation In Respiratory Therapy Program

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    Respiratory therapy graduate students are going to face a clinical environment that commands greater responsibility and culpability than in years past. Therefore, respiratory therapy educators must prepare graduates for the multidimensional demands of the workplace. PURPOSE: The purpose of this study was to explore the perception of the undergraduate respiratory therapy (BSRT) and integrated graduate respiratory therapy (MSRT) students in the implementation of simulation in the educational laboratory setting. METHODS: Data were collected through a descriptive survey. The survey was distributed to a convenience sample of first year BSRT and MSRT students attending an accredited respiratory therapy program at an urban public research university in the southeast United States. The survey consisted of 10 questions presented in a four-point Likert-type scale to obtain students’ perceptions regarding their simulation experience. The collected data were analyzed using descriptive statistics. RESULTS: Thirty-two students were surveyed, more than two-thirds of the participants were female. Approximately seventy-one percent of respondents were BSRT, females accounted for 87% and males 13%. Graduate MSRT were 28.1% of the total sample with 44.4% females and 55.6% males. More than two-thirds of MSRT students reported previous clinical experience while BSRT students reported less than one-quarter. Additionally, only two students from BSRT indicated that they have previous simulation experience, whereas more than half of MSRT students reported previous simulation experience. The study findings indicate BSRT and MSRT students’ overall perceptions are similar, however, both perceive the experience of nervousness differently. BSRT students indicated high agreement with the statement that they experienced nervousness during the simulation with mean = 3.52 (SD ± .51). MSRT students indicated high agreement with the statement that simulation was a valuable learning experience with mean = 3.33 (SD ± .70). Both of BSRT & MSRT students agreed that simulation should continue to be an integral part of the respiratory therapy program. MSRT students demonstrated higher agreement with mean = 3.55 (SD ± .72). Finally, the majority of responses to a debriefing session after simulation experience supported their understanding and reasoning were positive from both BSRT & MSRT students with means respectively = 3.39 (SD ± .65), and 3.55, (SD ± .52). CONCLUSION: Respiratory therapy educators continue to strive to enhance respiratory therapy students’ clinical reasoning, transference of theory to clinical practice, skills acquisition, and critical thinking. Use of simulation is essential to achieve these objectives. The results of this study support the implementation of simulation course in the curriculum as a mandatory requirement prior to clinical practice as evidenced by positive responses from students. Although students felt positively that simulation should be continued in the curriculum, they did not feel it should totally substitute for all clinical experiences

    Haptic-Enhanced Learning in Preclinical Operative Dentistry

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    Background: Virtual reality haptic simulators represent a new paradigm in dental education that may potentially impact the rate and efficiency of basic skill acquisition, as well as pedagogically influence the various aspects of students’ preclinical experience. However, the evidence to support their efficiency and inform their implementation is still limited. Objectives: This thesis set out to empirically examine how haptic VR simulator (Simodont®) can enhance the preclinical dental education experience particularly in the context of operative dentistry. We specify 4 distinct research themes to explore, namely: simulator validity (face, content and predictive), human factors in 3D stereoscopic display, motor skill acquisition, and curriculum integration. Methods: Chapter 3 explores the face and content validity of Simodont® haptic dental simulator among a group of postgraduate dental students. Chapter 4 examines the predictive utility of Simodont® in predicting subsequent preclinical and clinical performance. The results indicate the potential utility of the simulator in predicting future clinical dental performance among undergraduate students. Chapter 5 investigates the role of stereopsis in dentistry from two different perspectives via two studies. Chapter 6 explores the effect of qualitatively different types of pedagogical feedback on the training, transfer and retention of basic manual dexterity dental skills. The results indicate that the acquisition and retention of basic dental motor skills in novice trainees is best optimised through a combination of instructor and visualdisplay VR-driven feedback. A pedagogical model for integration of haptic dental simulator into the dental curriculum has been proposed in Chapter 7. Conclusion: The findings from this thesis provide new insights into the utility of the haptic virtual reality simulator in undergraduate preclinical dental education. Haptic simulators have promising potential as a pedagogical tool in undergraduate dentistry that complements the existing simulation methods. Integration of haptic VR simulators into the dental curriculum has to be informed by sound pedagogical principles and mapped into specific learning objectives

    Improving Trauma Team Process and Performance through Simulation

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    According to the National Trauma Institute [NTI] (2014), trauma accounts for 41 million United States emergency department visits and 2.3 million hospital admissions. It is the leading cause of death in people age 1-46 years and is the third leading cause of death overall. Doumouras, Keshet, Nathens, Ahmed, and Hicks (2014) reported that errors in trauma resuscitation can be linked to deficiencies in trauma team processes and performance. These deficiencies were found in a level II trauma center in a small Midwestern city. This project was developed to provide evidence-based team training strategies to improve the care of the trauma patient at the facility. Simulation was chosen as the method of instrnction, based on the theoretical framework provided by Bandura\u27s Social Learning Theory and Taimer\u27s Model of Clinical Judgment. A comprehensive literature review was conducted to identify evidence-based strategies for simulation program development. The evidence was presented to the key stakeholders at the facility in order to gain feedback and fmther recommendations for the project. This project directly impacted nursing as it addressed knowledge, skills and attitudes of each of the six core competencies for graduate nurses, as identified by the Quality and Safety Education for Nurses [QSEN] initiative (QSEN, 2014

    Aerospace medicine and biology: A continuing bibliography with indexes (supplement 324)

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    This bibliography lists 200 reports, articles and other documents introduced into the NASA Scientific and Technical Information System during May, 1989. Subject coverage includes: aerospace medicine and psychology, life support systems and controlled environments, safety equipment, exobiology and extraterrestrial life, and flight crew behavior and performance

    Patient Specific Systems for Computer Assisted Robotic Surgery Simulation, Planning, and Navigation

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    The evolving scenario of surgery: starting from modern surgery, to the birth of medical imaging and the introduction of minimally invasive techniques, has seen in these last years the advent of surgical robotics. These systems, making possible to get through the difficulties of endoscopic surgery, allow an improved surgical performance and a better quality of the intervention. Information technology contributed to this evolution since the beginning of the digital revolution: providing innovative medical imaging devices and computer assisted surgical systems. Afterwards, the progresses in computer graphics brought innovative visualization modalities for medical datasets, and later the birth virtual reality has paved the way for virtual surgery. Although many surgical simulators already exist, there are no patient specific solutions. This thesis presents the development of patient specific software systems for preoperative planning, simulation and intraoperative assistance, designed for robotic surgery: in particular for bimanual robots that are becoming the future of single port interventions. The first software application is a virtual reality simulator for this kind of surgical robots. The system has been designed to validate the initial port placement and the operative workspace for the potential application of this surgical device. Given a bimanual robot with its own geometry and kinematics, and a patient specific 3D virtual anatomy, the surgical simulator allows the surgeon to choose the optimal positioning of the robot and the access port in the abdominal wall. Additionally, it makes possible to evaluate in a virtual environment if a dexterous movability of the robot is achievable, avoiding unwanted collisions with the surrounding anatomy to prevent potential damages in the real surgical procedure. Even if the software has been designed for a specific bimanual surgical robot, it supports any open kinematic chain structure: as far as it can be described in our custom format. The robot capabilities to accomplish specific tasks can be virtually tested using the deformable models: interacting directly with the target virtual organs, trying to avoid unwanted collisions with the surrounding anatomy not involved in the intervention. Moreover, the surgical simulator has been enhanced with algorithms and data structures to integrate biomechanical parameters into virtual deformable models (based on mass-spring-damper network) of target solid organs, in order to properly reproduce the physical behaviour of the patient anatomy during the interactions. The main biomechanical parameters (Young's modulus and density) have been integrated, allowing the automatic tuning of some model network elements, such as: the node mass and the spring stiffness. The spring damping coefficient has been modeled using the Rayleigh approach. Furthermore, the developed method automatically detect the external layer, allowing the usage of both the surface and internal Young's moduli, in order to model the main parts of dense organs: the stroma and the parenchyma. Finally the model can be manually tuned to represent lesion with specific biomechanical properties. Additionally, some software modules of the simulator have been properly extended to be integrated in a patient specific computer guidance system for intraoperative navigation and assistance in robotic single port interventions. This application provides guidance functionalities working in three different modalities: passive as a surgical navigator, assistive as a guide for the single port placement and active as a tutor preventing unwanted collision during the intervention. The simulation system has beed tested by five surgeons: simulating the robot access port placemen, and evaluating the robot movability and workspace inside the patient abdomen. The tested functionalities, rated by expert surgeons, have shown good quality and performance of the simulation. Moreover, the integration of biomechanical parameters into deformable models has beed tested with various material samples. The results have shown a good visual realism ensuring the performance required by an interactive simulation. Finally, the intraoperative navigator has been tested performing a cholecystectomy on a synthetic patient mannequin, in order to evaluate: the intraoperative navigation accuracy, the network communications latency and the overall usability of the system. The tests performed demonstrated the effectiveness and the usability of the software systems developed: encouraging the introduction of the proposed solution in the clinical practice, and the implementation of further improvements. Surgical robotics will be enhanced by an advanced integration of medical images into software systems: allowing the detailed planning of surgical interventions by means of virtual surgery simulation based on patient specific biomechanical parameters. Furthermore, the advanced functionalities offered by these systems, enable surgical robots to improve the intraoperative surgical assistance: benefitting of the knowledge of the virtual patient anatomy

    The HoloLens in Medicine: A systematic Review and Taxonomy

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    The HoloLens (Microsoft Corp., Redmond, WA), a head-worn, optically see-through augmented reality display, is the main player in the recent boost in medical augmented reality research. In medical settings, the HoloLens enables the physician to obtain immediate insight into patient information, directly overlaid with their view of the clinical scenario, the medical student to gain a better understanding of complex anatomies or procedures, and even the patient to execute therapeutic tasks with improved, immersive guidance. In this systematic review, we provide a comprehensive overview of the usage of the first-generation HoloLens within the medical domain, from its release in March 2016, until the year of 2021, were attention is shifting towards it's successor, the HoloLens 2. We identified 171 relevant publications through a systematic search of the PubMed and Scopus databases. We analyze these publications in regard to their intended use case, technical methodology for registration and tracking, data sources, visualization as well as validation and evaluation. We find that, although the feasibility of using the HoloLens in various medical scenarios has been shown, increased efforts in the areas of precision, reliability, usability, workflow and perception are necessary to establish AR in clinical practice.Comment: 35 pages, 11 figure

    Augmented reality (AR) for surgical robotic and autonomous systems: State of the art, challenges, and solutions

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    Despite the substantial progress achieved in the development and integration of augmented reality (AR) in surgical robotic and autonomous systems (RAS), the center of focus in most devices remains on improving end-effector dexterity and precision, as well as improved access to minimally invasive surgeries. This paper aims to provide a systematic review of different types of state-of-the-art surgical robotic platforms while identifying areas for technological improvement. We associate specific control features, such as haptic feedback, sensory stimuli, and human-robot collaboration, with AR technology to perform complex surgical interventions for increased user perception of the augmented world. Current researchers in the field have, for long, faced innumerable issues with low accuracy in tool placement around complex trajectories, pose estimation, and difficulty in depth perception during two-dimensional medical imaging. A number of robots described in this review, such as Novarad and SpineAssist, are analyzed in terms of their hardware features, computer vision systems (such as deep learning algorithms), and the clinical relevance of the literature. We attempt to outline the shortcomings in current optimization algorithms for surgical robots (such as YOLO and LTSM) whilst providing mitigating solutions to internal tool-to-organ collision detection and image reconstruction. The accuracy of results in robot end-effector collisions and reduced occlusion remain promising within the scope of our research, validating the propositions made for the surgical clearance of ever-expanding AR technology in the future
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