Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"surgical instruments"”.
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Safety Evaluation of Surgical Instruments
… concerns this thesis focuses on the quality of surgical instruments. The current situation is reviewed by considering the regulatory framework and by investigating the quality of newly purchased instruments. A range of test protocols based on British Standards and best practices from industry …
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Resonance Tracking and Vibration Stabilisation of Ultrasonic Surgical Instruments
Ultrasonic surgical instruments actuated by piezoelectric transducers are usually driven at relatively high power levels to generate high vibration amplitude at the probe, which interact with biological tissues to achieve the desired effects. In operation, the high power level introduces …
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Design of teleoperated surgical instruments for minimally invasive surgery
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Novel Smart Actuation Systems for Single-port Laparoscopic Surgical Instruments
… trocar port is available to accommodate all the surgical instruments and therefore, it is difficult to achieve the required angulation during these procedures. This problem was worsened by the limited functionality of the current surgical instruments, which are rigid and slender, resulting in …
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A Comprehensive Methodology for Assessing Biomechanical Risks Associated with Hand Tool Use: Applied to Laparoscopic Surgical Instruments
… the biomechanical risk factors associated with surgical hand tools had never been performed. Utilizing an opto-electronic motion capture system meant the exact surgeon posture was recorded during simulated surgical tasks. Electromyography was used to evaluate muscle recruitment and workload for …
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Laser treatment of hemangiomas using spectroscopic feedback : the "smart scalpel"
… widespread throughout many engineering fields, surgical instruments with embedded feedback control systems are uncommon. To improve the effectiveness of microsurgical techniques, we are presently developing a semi-autonomous robotic surgical tool (called the "Smart Scalpel") as an alternative …
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External operations portfolio analysis and segmentation
… a razor-and-blades business strategy, in which surgical instruments are offered to customers at little or no cost in order to facilitate the sale of certain implantable products that require the use of such instruments. It faces considerable challenges in managing the instrument supply chain. …
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A comparison between traditional and modern circumcision practices in the prevention of HIV and other STIs transmission in Chavuma and Kapiri Mposhi districts.
… of 1994 documents that, circumcision is the surgical removal of the skin that normally covers and protects the head of the penis. To curb HIV and other STIs pandemic among the citizenry and in line with the UNAIDS 90-90-90 strategy, Zambia’s Health Policy of 1991 advocates for safe voluntary …
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A comparison between traditional and modern circumcision practices in the prevention of HIV and other STIs transmission in Chavuma and Kapiri Mposhi districts.
… of 1994 documents that, circumcision is the surgical removal of the skin that normally covers and protects the head of the penis. To curb HIV and other STIs pandemic among the citizenry and in line with the UNAIDS 90-90-90 strategy, Zambia’s Health Policy of 1991 advocates for safe voluntary …
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Operating Room Awareness with the Smart Trocar: Innovative Laparoscopic Surgery
… accuracy, both recognize and localize the rigid surgical instruments. Applications of this invention are multiple. For examples, it can be used as a pointer to localize specific part of the organs during a laparoscopic surgery. It can also be used to analyze tools paths and to evaluate surgical …
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Design of an ultraportable surgical enclosure for low resource environments
Access to surgical care for people in remote settings and/or developing countries is limited: 30% of the world's population receives 75% of major operations [1]. In developing countries, up to a third of patients acquire a surgical site infection (SSI), which is nine times more likely than in …
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Virtual environments for medical training : graphic and haptic simulation of tool-tissue interactions
For more than 2,500 years, surgical teaching has been based on the so called "see one, do one, teach one" paradigm, in which the surgical trainee learns by operating on patients under close supervision of peers and superiors. However, higher demands on the quality of patient care and rising …
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Minimally invasive instrument for in vivo measurement of solid organ mechanical impedance
… be addressed through realistic computer-based surgical simulation systems. To generate a simulation that includes both tactile/haptic and visual feedback, one must know what the material properties of tissue are, so that a finite element or other model can generate the proper predictions for …
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Improving supply chain agility of a medical device Manufacturer
… medical device manufacturer, DeCo, which offers surgical instruments to customers at no cost in order to facilitate the sale of implantable products that require the use of such instruments. DeCo is facing challenges in managing the supply chain for these outsourced instruments, such as long lead …
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Resource Deployment Strategies Following Initial Public Offering: Connecting Resource -Based, Upper Echelons, and Agency Perspectives
… entrepreneurial firms in the medical and surgical instruments industry, this dissertation provides five answers for the first research question. First, in support of resource-based theory, overall profitability of R&D investments increases with firm-specific experience possibly due to …
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Creating an open source electromagnetic tracking platform
… The integration of electromagnetic in surgical instruments is explored through the design of custom electromagnetic tracking coils for use with the Anser system. A number of hand-wound coils were designed and tested to successfully track laparoscopic and endoscopic instruments with …
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On-chip magnetic sensor and readout design for 3D position tracking in image-guided interventions
… providing precise real-time tracking of surgical instruments while reducing dependence on radiation-based imaging. EMT is particularly beneficial in various image-guided interventions, enhancing accuracy and safety. Despite its advantages, EMT has not been widely adopted in common …
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3D printing in Clinical Diagnostics: A Versatile Tool to Develop Testing Devices for the Diagnosis of Infectious Diseases
… to produce brand-new medical devices and surgical instruments. 3DP allows for a fast feedback loop which accelerates design development; designers and manufacturers can rely on the use of early 3D printed parts to support clinical trials or early commercialization while the final design is …
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The use of optical coherence tomography to enhance surgical margin assessment for canine mast cell tumors
… of artifacts created by commonly encountered surgical conditions and instrumentation on optical coherence tomography (OCT) and compare these findings with histopathology. Study design: Ex vivo study Animals: 5 canine cadavers Methods: Skin, subcutaneous fat, skeletal muscle, and fascia samples …
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A Volume Rendering Engine for Desktops, Laptops, Mobile Devices and Immersive Virtual Reality Systems using GPU-Based Volume Raycasting
… algorithm to support the insertion of surgical instruments into the volume for surgical planning. Additionally, the integration of segmentation routines would allow new methods of interaction for segmentation routine training to be studied for different platforms. VIPRE will also be …
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