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Virtual surgery

Qian Zhou, Georg Hagemann, Dylan Fafard, Ian Stavness, Sidney Fels
Fish Tank Virtual Reality (FTVR) displays create a compelling 3D spatial effect by rendering to the perspective of the viewer with head-tracking. Combining FTVR with a spherical display enhances the 3D experience with unique properties of the spherical screen such as the enclosing shape, consistent curved surface, and borderless views from all angles around the display. The ability to generate a strong 3D effect on a spherical display with head-tracked rendering is promising for increasing user's performance in 3D tasks...
February 14, 2019: IEEE Transactions on Visualization and Computer Graphics
Marina Z Barbosa, Daniel S Zylbersztejn, Leandro A de Mattos, Luiz F Carvalho
BACKGROUND: 3D printing has wide application in medicine while it provides customizability and precision for anatomical model development. Our aims were to perform a systematic review and to explore the use of 3D printing applications on human reproduction and reproductive surgery. METHODS: We have performed a systematic review in PubMed database to assess previous publications within 3D printing in human reproduction and gynecology. We have developed 3D models according to patients' magnetic resonance images (MRI)...
February 12, 2019: Minerva Ginecologica
Robert G Hahn, Markus Zdolsek, Emma Hasselgren, Joachim Zdolsek, Håkan Björne
AIMS: A population kinetic model was developed for the body fluid shifts occurring when 20% albumin is given by intravenous infusion. The aim was to study whether its efficacy to expand the plasma volume is impaired after major surgery. METHODS: An intravenous infusion of 3 mL/kg 20% albumin over 30 min was given to 15 volunteers and to 15 patients on the first day after major open abdominal surgery. Blood samples and urine were collected during 5 hours. Mixed-effect modeling software was used to develop a fluid volume kinetic model, using blood hemoglobin and urine excretion the estimate body fluid shifts, to which individual-specific covariates were added in sequence...
February 12, 2019: British Journal of Clinical Pharmacology
David van Nieuwenhuizen, K Mariam Slot, Martin Klein, Dagmar Verbaan, Esther Sanchez Aliaga, Jan J Heimans, W Peter Vandertop, Saskia M Peerdeman, Jaap C Reijneveld
BACKGROUND: Studies on the associations between preoperative cerebral edema, cognitive functioning, and health-related quality of life (HRQOL) in WHO grade I meningioma patients are virtually lacking. We studied the association between preoperative cerebral edema on postoperative cognitive functioning and HRQOL 6 months postoperatively in WHO grade I meningioma patients. METHODS: Twenty-one consecutive WHO grade I meningioma patients, who underwent surgery, were matched individually for age, gender, and educational level to healthy controls...
February 13, 2019: Acta Neurochirurgica
Derek Kwun-Hong Ho
BACKGROUND: Many surgical specialties are increasingly looking towards robot-assisted surgeries to improve patient outcome. Surgeons conducting robot-assisted operations require real-time surgical view. Ophthalmic robots can lead to novel vitreoretinal treatments, such as cannulating retinal vessels or even gene delivery to targeted retinal cells. This study investigates the feasibility of smartphone-delivered stereoscopic vision for microsurgical use. METHODS: A stereo-camera, connected to a laptop, was used to capture the 3D view from a binocular surgical microscope...
February 12, 2019: Eye
Luan V Tran, Ngoc H Ngo, Alkis J Psaltis
BACKGROUND: To date, there are numerous studies documenting the prevalence of frontal recess cells, but only 1 study using the newly developed International Frontal Sinus Anatomical Classification (IFAC) system. The identification of the frontal cells and their influence on the frontal drainage pathway plays an important role in endoscopic frontal sinus surgery. OBJECTIVE: The aim of this study is to document the radiological prevalence of various types of frontal cells, as classified by IFAC and the most common frontal sinus drainage pathways based on its anatomic relationships with these cells...
February 13, 2019: American Journal of Rhinology & Allergy
Kieran Gallagher, Shayan Bahadori, Jop Antonis, Tikki Immins, Thomas W Wainwright, Robert Middleton
OBJECTIVE: To assess the face, content and construct validity of a virtual reality hip arthroscopy simulator (Arthros™, VirtaMed AG, Schlieren, Switzerland). DESIGN: Participants were divided into Expert and Novice groups depending on whether or not they had assisted with or performed more than 50 hip arthroscopy procedures. Participants were given a standardized introduction and shown a video on how to use the simulator. To familiarise themselves with the equipment, they were then given a 5-minute diagnostic task to complete...
February 11, 2019: Surgical Technology International
Lohrasb R Sayadi, Alexandra Naides, Maddie Eng, Arman Fijany, Mustafa Chopan, Jamasb J Sayadi, Ashkaun Shaterian, Derek A Banyard, Gregory R D Evans, Raj Vyas, Alan D Widgerow
Mixed reality, a blending of the physical and digital worlds, can enhance the surgical experience, leading to greater precision, efficiency and improved outcomes. Various studies across different disciplines have reported encouraging results using mixed reality technologies, such as augmented and virtual reality. To provide a better understanding of the applications and limitations of this technology in plastic surgery, we performed a systematic review of the literature in accordance with PRISMA guidelines...
February 12, 2019: Aesthetic Surgery Journal
Fang Yang, Bo Zhai, Li-Gong Hou, Qian Zhang, Jie Wang
Background: Based on CT image data, a computational fluid dynamics (CFD) model of the aortic arch was established. We aimed to investigate the hemodynamic features associated with end-to-side anastomosis (ESA) surgery for coarctation of the aorta (CoA) by CFD model. Methods: The data of enhanced CT two-dimensional medical images obtained through clinical practice were processed using medical image post-processing software. The three-dimensional model of the aortic arch was obtained through the geometric model and boundary condition...
December 2018: Journal of Thoracic Disease
S E C M van de Vijfeijken, R Schreurs, L Dubois, A G Becking
PURPOSE: The aim of this study was to evaluate the accuracy of resection templates in cranioplasties in order to facilitate a one-stage resection and cranial reconstruction. PATIENTS AND METHODS: In three cases, cranial resections were combined with direct reconstructions using the principles of computer-aided design, manufacturing, and surgery. The precision of the resection template was evaluated through a distance map, comparing the planned and final result. RESULTS: The mean absolute difference between the planned and actual reconstructed contour was less than 1...
July 25, 2018: Journal of Cranio-maxillo-facial Surgery
Krishna Nalleballe, Rohan Sharma, Sukanthi Kovvuru, Aliza Brown, Sen Sheng, Sukumar Gundapaneni, Saritha Ranabothu, Poornachand Veerapaneni, Renee Joiner, Nidhi Kapoor, William Culp, Sanjeeva Onteddu
OBJECTIVE: The purpose of this study was to determine reasons for not giving intravenous tissue plasminogen activator to eligible patients with acute ischemic stroke in a telestroke network. METHODS: We performed a retrospective analysis of prospectively collected data of patients who were seen as a telestroke consultation during 2015 and 2016 with the Arkansas Stroke Assistance through Virtual Emergency Support programme for possible acute ischemic stroke. RESULTS: Total consultations seen were 809 in 2015 and 744 in 2016, out of which 238 patients in 2015 and 247 patients in 2016 received intravenous tissue plasminogen activator...
February 10, 2019: Journal of Telemedicine and Telecare
Frédéric Vanhove, Nathalie Noppe, Austin T Fragomen, Harm Hoekstra, Geert Vanderschueren, Willem-Jan Metsemakers
INTRODUCTION: Re-establishing anatomic rotational alignment of shaft fractures of the lower extremities remains challenging. Clinical evaluation in combination with radiological measurements is important in pre- and post-surgical assessment. Based on computed tomography (CT), a range of reference values for femoral torsion (FT) and tibial torsion (TT) have historically been reported, which require standardization to optimize the significant intra- and inter-observer variability. The aims of this study were (re-)evaluation of the reference FT and TT angles, determination of the normal intra-individual side-to-side torsional differences to aid the surgical decision-making process for reoperation, and development of a novel 3D measurement method for FT...
February 8, 2019: Archives of Orthopaedic and Trauma Surgery
David E Bauer, Karl Wieser, Alexander Aichmair, Patrick O Zingg, Claudio Dora, Stefan Rahm
PURPOSE: To assess construct and face validity of a novel virtual reality-based hip arthroscopy simulator using the previously validated Arthroscopic Surgery Skills Evaluation Tool (ASSET), metric parameters, and a questionnaire. METHODS: Metric parameters including task completion time, camera path, and grasper path were recorded, and the ASSET score was used to assess construct validity. Face validity was evaluated using a questionnaire. RESULTS: Nine hip arthroscopy experts, of whom the majority performed more than 200 procedures (age, 48 ± 7...
February 4, 2019: Arthroscopy: the Journal of Arthroscopic & related Surgery
Patrick J Louis, Anthony B Morlandt
For the 75th anniversary of the Journal of Oral and Maxillofacial Surgery, the authors were asked to review the past and examine advancements in the management of facial trauma. Several important advances in the management of maxillofacial trauma have resulted in improved outcomes. These include the development of high-resolution computed tomography, improved classification schemes, rigid fixation techniques, improved biomaterials, soft tissue resuspension, and primary bone grafting. Further advances in outcomes have occurred with the use of microsurgical techniques, free tissue transfer techniques, virtual surgical planning, endoscopic techniques, and surgical navigation...
November 2018: Journal of Oral and Maxillofacial Surgery
Zhibao Qin, Yonghang Tai, Chengqi Xia, Jun Peng, Xiaoqiao Huang, Zaiqing Chen, Qiong Li, Junsheng Shi
The aim of this study is to develop and assess the peg transfer training module face, content and construct validation use of the box, virtual reality (VR), cognitive virtual reality (CVR), augmented reality (AR), and mixed reality (MR) trainer, thereby to compare advantages and disadvantages of these simulators. Training system (VatsSim-XR) design includes customized haptic-enabled thoracoscopic instruments, virtual reality helmet set, endoscope kit with navigation, and the patient-specific corresponding training environment...
2019: Journal of Healthcare Engineering
Samuel R Barber, Kevin Wong, Vivek Kanumuri, Ruwan Kiringoda, Judith Kempfle, Aaron K Remenschneider, Elliott D Kozin, Daniel J Lee
Otolaryngologists increasingly use patient-specific 3-dimensional (3D)-printed anatomic physical models for preoperative planning. However, few reports describe concomitant use with virtual models. Herein, we aim to (1) use a 3D-printed patient-specific physical model with lateral skull base navigation for preoperative planning, (2) review anatomy virtually via augmented reality (AR), and (3) compare physical and virtual models to intraoperative findings in a challenging case of a symptomatic petrous apex cyst...
October 2018: OTO open
David Bairamian, Shinuo Liu, Behzad Eftekhar
BACKGROUND: Three-dimensional (3D) visualization of the neurovascular structures has helped preoperative surgical planning. 3D printed models and virtual reality (VR) devices are 2 options to improve 3D stereovision and stereoscopic depth perception of cerebrovascular anatomy for aneurysm surgery. OBJECTIVE: To investigate and compare the practicality and potential of 3D printed and VR models in a neurosurgical education context. METHODS: The VR angiogram was introduced through the development and testing of a VR smartphone app...
February 2, 2019: Neurosurgery
Jorge Zaragoza-Siqueiros, Hugo I Medellin-Castillo, Héctor de la Garza-Camargo, Theodore Lim, James M Ritchie
Conventional Orthognathic surgery (OGS) planning involves cephalometric analyses and dental casts to be mounted on an articulator. Dental segments are subsequently identified, cut and repositioned to allow the fabrication of intraoral wafers that guide the positioning of the osteotomy bone segments. This conventional planning introduces many inaccuracies that affect the post-surgery outcomes. Although computer technologies have advanced computational tools for OGS planning, they have failed in providing a practical solution...
February 4, 2019: Computer Methods in Biomechanics and Biomedical Engineering
Julia B Finkelstein, Dylan Cahill, Michael P Kurtz, Julie Campbell, Caitlin Schumann, Briony K Varda, Rosemary Grant, Kate Humphrey, Heather Meyers, Caleb P Nelson, Carlos R Estrada
PURPOSE: For postoperative visits, which are often brief interactions between family and clinician, patients may prefer the convenience of receiving postoperative care from home. We aimed to evaluate the feasibility of telemedicine for postoperative encounters in pediatric urology. MATERIALS AND METHODS: A prospective telemedicine pilot study was conducted during an implementation period from 11/10/17 to 3/22/18. All postoperative patients deemed eligible by one of four urologists were offered enrollment in the telemedicine program...
January 31, 2019: Journal of Urology
Kevin P Labadie, Stephanie K Schaub, Derek Khorsand, Guy Johnson, Smith Apisarnthanarax, James O Park
BACKGROUND: Hepatocellular carcinoma (HCC) is the second most lethal malignancy worldwide. There has been virtually no change in the survivability of HCC in spite of improvement in therapies. Surgery is considered the ideal first, curative intervention, however most patients present in advanced stages with unresectable disease. Therefore, systemic and liver-directed non-operative therapies are initially offered to downstage the disease. To ensure optimal management, a multidisciplinary team approach is often warranted...
January 27, 2019: World Journal of Hepatology
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