The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Sumit K. Agrawal - One of the best experts on this subject based on the ideXlab platform.
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face and content validity of a virtual reality simulator for Myringotomy with tube placement
Journal of Otolaryngology-head & Neck Surgery, 2015Co-Authors: Caiwen Huang, Sumit K. Agrawal, Horace Cheng, Yves Bureau, Hanif M. LadakAbstract:Myringotomy with tube insertion can be challenging for junior Otolaryngology residents as it is one of the first microscopic procedures they encounter. The Western Myringotomy simulator was developed to allow trainees to practice microscope positioning, Myringotomy, and tube placement. This virtual-reality simulator is viewed in stereoscopic 3D, and a haptic device is used to manipulate the digital ear model and surgical tools. To assess the face and content validity of the Western Myringotomy simulator. The Myringotomy simulator was integrated with new modules to allow speculum placement, manipulation of an operative microscope, and insertion of the ventilation tube through a deformable tympanic membrane. A questionnaire was developed in consultation with instructing surgeons. Fourteen face validity questions focused on the anatomy of the ear, simulation of the operative microscope, appearance and movement of the surgical instruments, deformation and cutting of the eardrum, and Myringotomy tube insertion. Six content validity questions focused on training potential on surgical tasks such as speculum placement, microscope positioning, tool navigation, ear anatomy, Myringotomy creation and tube insertion. A total of 12 participants from the Department of Otolaryngology—Head and Neck Surgery were recruited for the study. Prior to completing the questionnaire, participants were oriented to the simulator and given unlimited time to practice until they were comfortable with all of its aspects. Responses to 12 of the 14 questions on face validity were predominantly positive. One issue of concern was with contact modeling related to tube insertion into the eardrum, and the second was with the movement of the blade and forceps. The former could be resolved by using a higher resolution digital model for the eardrum to improve contact localization. The latter could be resolved by using a higher fidelity haptic device. With regard to content validity, 64 % of the responses were positive, 21 % were neutral, and 15 % were negative. The Western Myringotomy simulator appears to have sufficient face and content validity. Further development with automated metrics and skills transference testing is planned.
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Face and content validity of a virtual-reality simulator for Myringotomy with tube placement.
Journal of Otolaryngology-head & Neck Surgery, 2015Co-Authors: Caiwen Huang, Sumit K. Agrawal, Horace Cheng, Yves Bureau, Hanif M. LadakAbstract:Background Myringotomy with tube insertion can be challenging for junior Otolaryngology residents as it is one of the first microscopic procedures they encounter. The Western Myringotomy simulator was developed to allow trainees to practice microscope positioning, Myringotomy, and tube placement. This virtual-reality simulator is viewed in stereoscopic 3D, and a haptic device is used to manipulate the digital ear model and surgical tools.
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virtual reality Myringotomy simulation with real time deformation development and validity testing
Laryngoscope, 2012Co-Authors: Andrew K. Ho, Hussain Alsaffar, Philip C. Doyle, Hanif M. Ladak, Sumit K. AgrawalAbstract:Objectives/Hypothesis: Surgical simulation is becoming an increasingly common training tool in residency programs. The first objective was to implement real-time soft-tissue deformation and cutting into a virtual reality Myringotomy simulator. The second objective was to test the various implemented incision algorithms to determine which most accurately represents the tympanic membrane during Myringotomy. Study Design: Descriptive and face-validity testing. Methods: A deformable tympanic membrane was developed, and three soft-tissue cutting algorithms were successfully implemented into the virtual reality Myringotomy simulator. The algorithms included element removal, direction prediction, and Delaunay cutting. The simulator was stable and capable of running in real time on inexpensive hardware. A face-validity study was then carried out using a validated questionnaire given to eight otolaryngologists and four senior otolaryngology residents. Each participant was given an adaptation period on the simulator, was blinded to the algorithm being used, and was presented the three algorithms in a randomized order. Results: A virtual reality Myringotomy simulator with real-time soft-tissue deformation and cutting was successfully developed. The simulator was stable, ran in real time on inexpensive hardware, and incorporated haptic feedback and stereoscopic vision. The Delaunay cutting algorithm was found to be the most realistic algorithm representing the incision during Myringotomy (P < .05). The Likert and visual analog scales had strong correlations, suggesting good internal reliability. Conclusions: The first virtual reality Myringotomy simulator is being developed and now integrates a real-time deformable tympanic membrane that appears to have face validity. Further development and validation studies are necessary before the simulator can be studied with respect to training efficacy and clinical impact. Laryngoscope, 2012
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Virtual reality Myringotomy simulation with real-time deformation: Development and validity testing
Laryngoscope, 2012Co-Authors: Andrew K. Ho, Hussain Alsaffar, Philip C. Doyle, Hanif M. Ladak, Sumit K. AgrawalAbstract:OBJECTIVES/HYPOTHESIS: Surgical simulation is becoming an increasingly common training tool in residency programs. The first objective was to implement real-time soft-tissue deformation and cutting into a virtual reality Myringotomy simulator. The second objective was to test the various implemented incision algorithms to determine which most accurately represents the tympanic membrane during Myringotomy. STUDY DESIGN: Descriptive and face-validity testing. METHODS: A deformable tympanic membrane was developed, and three soft-tissue cutting algorithms were successfully implemented into the virtual reality Myringotomy simulator. The algorithms included element removal, direction prediction, and Delaunay cutting. The simulator was stable and capable of running in real time on inexpensive hardware. A face-validity study was then carried out using a validated questionnaire given to eight otolaryngologists and four senior otolaryngology residents. Each participant was given an adaptation period on the simulator, was blinded to the algorithm being used, and was presented the three algorithms in a randomized order. RESULTS: A virtual reality Myringotomy simulator with real-time soft-tissue deformation and cutting was successfully developed. The simulator was stable, ran in real time on inexpensive hardware, and incorporated haptic feedback and stereoscopic vision. The Delaunay cutting algorithm was found to be the most realistic algorithm representing the incision during Myringotomy (P < .05). The Likert and visual analog scales had strong correlations, suggesting good internal reliability. CONCLUSIONS: The first virtual reality Myringotomy simulator is being developed and now integrates a real-time deformable tympanic membrane that appears to have face validity. Further development and validation studies are necessary before the simulator can be studied with respect to training efficacy and clinical impact.
Andrew K. Ho - One of the best experts on this subject based on the ideXlab platform.
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virtual reality Myringotomy simulation with real time deformation development and validity testing
Laryngoscope, 2012Co-Authors: Andrew K. Ho, Hussain Alsaffar, Philip C. Doyle, Hanif M. Ladak, Sumit K. AgrawalAbstract:Objectives/Hypothesis: Surgical simulation is becoming an increasingly common training tool in residency programs. The first objective was to implement real-time soft-tissue deformation and cutting into a virtual reality Myringotomy simulator. The second objective was to test the various implemented incision algorithms to determine which most accurately represents the tympanic membrane during Myringotomy. Study Design: Descriptive and face-validity testing. Methods: A deformable tympanic membrane was developed, and three soft-tissue cutting algorithms were successfully implemented into the virtual reality Myringotomy simulator. The algorithms included element removal, direction prediction, and Delaunay cutting. The simulator was stable and capable of running in real time on inexpensive hardware. A face-validity study was then carried out using a validated questionnaire given to eight otolaryngologists and four senior otolaryngology residents. Each participant was given an adaptation period on the simulator, was blinded to the algorithm being used, and was presented the three algorithms in a randomized order. Results: A virtual reality Myringotomy simulator with real-time soft-tissue deformation and cutting was successfully developed. The simulator was stable, ran in real time on inexpensive hardware, and incorporated haptic feedback and stereoscopic vision. The Delaunay cutting algorithm was found to be the most realistic algorithm representing the incision during Myringotomy (P < .05). The Likert and visual analog scales had strong correlations, suggesting good internal reliability. Conclusions: The first virtual reality Myringotomy simulator is being developed and now integrates a real-time deformable tympanic membrane that appears to have face validity. Further development and validation studies are necessary before the simulator can be studied with respect to training efficacy and clinical impact. Laryngoscope, 2012
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Virtual reality Myringotomy simulation with real-time deformation: Development and validity testing
Laryngoscope, 2012Co-Authors: Andrew K. Ho, Hussain Alsaffar, Philip C. Doyle, Hanif M. Ladak, Sumit K. AgrawalAbstract:OBJECTIVES/HYPOTHESIS: Surgical simulation is becoming an increasingly common training tool in residency programs. The first objective was to implement real-time soft-tissue deformation and cutting into a virtual reality Myringotomy simulator. The second objective was to test the various implemented incision algorithms to determine which most accurately represents the tympanic membrane during Myringotomy. STUDY DESIGN: Descriptive and face-validity testing. METHODS: A deformable tympanic membrane was developed, and three soft-tissue cutting algorithms were successfully implemented into the virtual reality Myringotomy simulator. The algorithms included element removal, direction prediction, and Delaunay cutting. The simulator was stable and capable of running in real time on inexpensive hardware. A face-validity study was then carried out using a validated questionnaire given to eight otolaryngologists and four senior otolaryngology residents. Each participant was given an adaptation period on the simulator, was blinded to the algorithm being used, and was presented the three algorithms in a randomized order. RESULTS: A virtual reality Myringotomy simulator with real-time soft-tissue deformation and cutting was successfully developed. The simulator was stable, ran in real time on inexpensive hardware, and incorporated haptic feedback and stereoscopic vision. The Delaunay cutting algorithm was found to be the most realistic algorithm representing the incision during Myringotomy (P < .05). The Likert and visual analog scales had strong correlations, suggesting good internal reliability. CONCLUSIONS: The first virtual reality Myringotomy simulator is being developed and now integrates a real-time deformable tympanic membrane that appears to have face validity. Further development and validation studies are necessary before the simulator can be studied with respect to training efficacy and clinical impact.
Hanif M. Ladak - One of the best experts on this subject based on the ideXlab platform.
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face and content validity of a virtual reality simulator for Myringotomy with tube placement
Journal of Otolaryngology-head & Neck Surgery, 2015Co-Authors: Caiwen Huang, Sumit K. Agrawal, Horace Cheng, Yves Bureau, Hanif M. LadakAbstract:Myringotomy with tube insertion can be challenging for junior Otolaryngology residents as it is one of the first microscopic procedures they encounter. The Western Myringotomy simulator was developed to allow trainees to practice microscope positioning, Myringotomy, and tube placement. This virtual-reality simulator is viewed in stereoscopic 3D, and a haptic device is used to manipulate the digital ear model and surgical tools. To assess the face and content validity of the Western Myringotomy simulator. The Myringotomy simulator was integrated with new modules to allow speculum placement, manipulation of an operative microscope, and insertion of the ventilation tube through a deformable tympanic membrane. A questionnaire was developed in consultation with instructing surgeons. Fourteen face validity questions focused on the anatomy of the ear, simulation of the operative microscope, appearance and movement of the surgical instruments, deformation and cutting of the eardrum, and Myringotomy tube insertion. Six content validity questions focused on training potential on surgical tasks such as speculum placement, microscope positioning, tool navigation, ear anatomy, Myringotomy creation and tube insertion. A total of 12 participants from the Department of Otolaryngology—Head and Neck Surgery were recruited for the study. Prior to completing the questionnaire, participants were oriented to the simulator and given unlimited time to practice until they were comfortable with all of its aspects. Responses to 12 of the 14 questions on face validity were predominantly positive. One issue of concern was with contact modeling related to tube insertion into the eardrum, and the second was with the movement of the blade and forceps. The former could be resolved by using a higher resolution digital model for the eardrum to improve contact localization. The latter could be resolved by using a higher fidelity haptic device. With regard to content validity, 64 % of the responses were positive, 21 % were neutral, and 15 % were negative. The Western Myringotomy simulator appears to have sufficient face and content validity. Further development with automated metrics and skills transference testing is planned.
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Face and content validity of a virtual-reality simulator for Myringotomy with tube placement.
Journal of Otolaryngology-head & Neck Surgery, 2015Co-Authors: Caiwen Huang, Sumit K. Agrawal, Horace Cheng, Yves Bureau, Hanif M. LadakAbstract:Background Myringotomy with tube insertion can be challenging for junior Otolaryngology residents as it is one of the first microscopic procedures they encounter. The Western Myringotomy simulator was developed to allow trainees to practice microscope positioning, Myringotomy, and tube placement. This virtual-reality simulator is viewed in stereoscopic 3D, and a haptic device is used to manipulate the digital ear model and surgical tools.
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virtual reality Myringotomy simulation with real time deformation development and validity testing
Laryngoscope, 2012Co-Authors: Andrew K. Ho, Hussain Alsaffar, Philip C. Doyle, Hanif M. Ladak, Sumit K. AgrawalAbstract:Objectives/Hypothesis: Surgical simulation is becoming an increasingly common training tool in residency programs. The first objective was to implement real-time soft-tissue deformation and cutting into a virtual reality Myringotomy simulator. The second objective was to test the various implemented incision algorithms to determine which most accurately represents the tympanic membrane during Myringotomy. Study Design: Descriptive and face-validity testing. Methods: A deformable tympanic membrane was developed, and three soft-tissue cutting algorithms were successfully implemented into the virtual reality Myringotomy simulator. The algorithms included element removal, direction prediction, and Delaunay cutting. The simulator was stable and capable of running in real time on inexpensive hardware. A face-validity study was then carried out using a validated questionnaire given to eight otolaryngologists and four senior otolaryngology residents. Each participant was given an adaptation period on the simulator, was blinded to the algorithm being used, and was presented the three algorithms in a randomized order. Results: A virtual reality Myringotomy simulator with real-time soft-tissue deformation and cutting was successfully developed. The simulator was stable, ran in real time on inexpensive hardware, and incorporated haptic feedback and stereoscopic vision. The Delaunay cutting algorithm was found to be the most realistic algorithm representing the incision during Myringotomy (P < .05). The Likert and visual analog scales had strong correlations, suggesting good internal reliability. Conclusions: The first virtual reality Myringotomy simulator is being developed and now integrates a real-time deformable tympanic membrane that appears to have face validity. Further development and validation studies are necessary before the simulator can be studied with respect to training efficacy and clinical impact. Laryngoscope, 2012
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Virtual reality Myringotomy simulation with real-time deformation: Development and validity testing
Laryngoscope, 2012Co-Authors: Andrew K. Ho, Hussain Alsaffar, Philip C. Doyle, Hanif M. Ladak, Sumit K. AgrawalAbstract:OBJECTIVES/HYPOTHESIS: Surgical simulation is becoming an increasingly common training tool in residency programs. The first objective was to implement real-time soft-tissue deformation and cutting into a virtual reality Myringotomy simulator. The second objective was to test the various implemented incision algorithms to determine which most accurately represents the tympanic membrane during Myringotomy. STUDY DESIGN: Descriptive and face-validity testing. METHODS: A deformable tympanic membrane was developed, and three soft-tissue cutting algorithms were successfully implemented into the virtual reality Myringotomy simulator. The algorithms included element removal, direction prediction, and Delaunay cutting. The simulator was stable and capable of running in real time on inexpensive hardware. A face-validity study was then carried out using a validated questionnaire given to eight otolaryngologists and four senior otolaryngology residents. Each participant was given an adaptation period on the simulator, was blinded to the algorithm being used, and was presented the three algorithms in a randomized order. RESULTS: A virtual reality Myringotomy simulator with real-time soft-tissue deformation and cutting was successfully developed. The simulator was stable, ran in real time on inexpensive hardware, and incorporated haptic feedback and stereoscopic vision. The Delaunay cutting algorithm was found to be the most realistic algorithm representing the incision during Myringotomy (P < .05). The Likert and visual analog scales had strong correlations, suggesting good internal reliability. CONCLUSIONS: The first virtual reality Myringotomy simulator is being developed and now integrates a real-time deformable tympanic membrane that appears to have face validity. Further development and validation studies are necessary before the simulator can be studied with respect to training efficacy and clinical impact.
Henk M Blom - One of the best experts on this subject based on the ideXlab platform.
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laser Myringotomy versus ventilation tubes in children with otitis media with effusion a randomized trial
Laryngoscope, 2004Co-Authors: Jan Koopman, A G Reuchlin, Eelco E Kummer, Leon J J M Boumans, E Rijntjes, L J Hoeve, Paul G H Mulder, Henk M BlomAbstract:Objectives: Insertion of ventilation tubes in children with otitis media with effusion (OME) is an accepted and common treatment procedure. The majority of patients require general anesthesia. Although laser Myringotomy can be performed in local anesthesia, evidence is lacking that this treatment modality is an alternative for tubes, and outcome predictors for laser Myringotomy are not available. Study Design: Prospective randomized trial. Methods: We screened 1,403 children with chronic OME that were indicated for placement of ventilation tubes. In the eligible patients, we performed laser Myringotomy in one ear and placed a tube in the other ear, both within the same patient. Follow-up was scheduled each month for 6 months. Success was defined as absence of effusion or aural discharge. A logistic regression model was used with success of the therapy as binary outcome. This model was based on base-line variables, asked for in a parent's questionnaire. Results: Two hundred eight children received the allocated intervention, and no complications occurred. The mean closure time of the laser perforation was 2.4 weeks, and the mean patency time of the ventilation tube was 4.0 months. The mean success rate was 40% for laser and 78% for tubes. Ten known variables were found to predict middle ear status after therapy. Conclusion: Laser Myringotomy is a safe but less-effective procedure than insertion of a ventilation tube in the treatment of chronic OME. The prognostic model enables the otolaryngologist to choose the surgical treatment for the child that benefits most: laser Myringotomy or ventilation tube.
Hussain Alsaffar - One of the best experts on this subject based on the ideXlab platform.
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virtual reality Myringotomy simulation with real time deformation development and validity testing
Laryngoscope, 2012Co-Authors: Andrew K. Ho, Hussain Alsaffar, Philip C. Doyle, Hanif M. Ladak, Sumit K. AgrawalAbstract:Objectives/Hypothesis: Surgical simulation is becoming an increasingly common training tool in residency programs. The first objective was to implement real-time soft-tissue deformation and cutting into a virtual reality Myringotomy simulator. The second objective was to test the various implemented incision algorithms to determine which most accurately represents the tympanic membrane during Myringotomy. Study Design: Descriptive and face-validity testing. Methods: A deformable tympanic membrane was developed, and three soft-tissue cutting algorithms were successfully implemented into the virtual reality Myringotomy simulator. The algorithms included element removal, direction prediction, and Delaunay cutting. The simulator was stable and capable of running in real time on inexpensive hardware. A face-validity study was then carried out using a validated questionnaire given to eight otolaryngologists and four senior otolaryngology residents. Each participant was given an adaptation period on the simulator, was blinded to the algorithm being used, and was presented the three algorithms in a randomized order. Results: A virtual reality Myringotomy simulator with real-time soft-tissue deformation and cutting was successfully developed. The simulator was stable, ran in real time on inexpensive hardware, and incorporated haptic feedback and stereoscopic vision. The Delaunay cutting algorithm was found to be the most realistic algorithm representing the incision during Myringotomy (P < .05). The Likert and visual analog scales had strong correlations, suggesting good internal reliability. Conclusions: The first virtual reality Myringotomy simulator is being developed and now integrates a real-time deformable tympanic membrane that appears to have face validity. Further development and validation studies are necessary before the simulator can be studied with respect to training efficacy and clinical impact. Laryngoscope, 2012
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Virtual reality Myringotomy simulation with real-time deformation: Development and validity testing
Laryngoscope, 2012Co-Authors: Andrew K. Ho, Hussain Alsaffar, Philip C. Doyle, Hanif M. Ladak, Sumit K. AgrawalAbstract:OBJECTIVES/HYPOTHESIS: Surgical simulation is becoming an increasingly common training tool in residency programs. The first objective was to implement real-time soft-tissue deformation and cutting into a virtual reality Myringotomy simulator. The second objective was to test the various implemented incision algorithms to determine which most accurately represents the tympanic membrane during Myringotomy. STUDY DESIGN: Descriptive and face-validity testing. METHODS: A deformable tympanic membrane was developed, and three soft-tissue cutting algorithms were successfully implemented into the virtual reality Myringotomy simulator. The algorithms included element removal, direction prediction, and Delaunay cutting. The simulator was stable and capable of running in real time on inexpensive hardware. A face-validity study was then carried out using a validated questionnaire given to eight otolaryngologists and four senior otolaryngology residents. Each participant was given an adaptation period on the simulator, was blinded to the algorithm being used, and was presented the three algorithms in a randomized order. RESULTS: A virtual reality Myringotomy simulator with real-time soft-tissue deformation and cutting was successfully developed. The simulator was stable, ran in real time on inexpensive hardware, and incorporated haptic feedback and stereoscopic vision. The Delaunay cutting algorithm was found to be the most realistic algorithm representing the incision during Myringotomy (P < .05). The Likert and visual analog scales had strong correlations, suggesting good internal reliability. CONCLUSIONS: The first virtual reality Myringotomy simulator is being developed and now integrates a real-time deformable tympanic membrane that appears to have face validity. Further development and validation studies are necessary before the simulator can be studied with respect to training efficacy and clinical impact.
