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 11 of 11 for “"Insertion Force"”.
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In Vivo Forces of Male Urethral Catheterization
… study was to quantify typical urethral catheter insertion forces of male anatomy in vivo. This provided a quantitative range of forces that may be used to objectively evaluate trainees or educational simulators. A custom-made Handheld Catheter Insertion Force Assessment tool (+/- 0.29N accuracy) …
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Mechanical Characteristics of Male Urethral Catheterization: Simulator and Cadaveric Donor Study
… a better understanding of the catheter insertion mechanical characteristics is needed to develop more realistic simulators for accurate clinical training. A custom-made Catheter Insertion Force Assessment Tool (+/- 0.25N absolute accuracy) and Position Acquisition System were used in …
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Effect of cochlear shape and size on cochlear implant insertion forces
… Firstly, it centres on the determinants of insertion forces (IFs) and intracochlear pressure (IP) during cochlear implantation, focusing on insertion depth, speed, and the role of robotic assistance. The findings underscore the necessity for standardisation across studies and offer critical …
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Instrumentation to characterize needle insertion into biological tissue
… micro needles. It is crucial to characterize the insertion of micro needles into biological tissues. Hence, instrumentation will be designed and fabricated for the characterization of micro needle insertion. This thesis focuses on the design and fabrication of such instrumentation. The instrument …
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AN ANALYSIS OF THE BUCKLING BEHAVIOR OF SPINAL ANESTHESIA NEEDLES
… to match the boundary conditions of needle insertion as performed by an anesthesiologist and a uniaxial servohydraulic material testing machine (MTS, Eden Prairie MN). Buckling tests were performed with 22G, 24G, 25G and 27G BD Whitacre, Havel Pajunk, Gertie Marx and B.Braun Pencan needles …
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Investigation into the Design of High-Power Plug-In Shipboard Electrical Connectors
… using 3D printing to verify mechanical insertion force constraints were satisfied.
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Penetration force measurements in the central nervous system with silicon electrodes
… is the tissue damage that occurs during insertion of microelectrodes into the central nervous system. The damage occurs as a result of the dimpling effect that is due to the insertion force. A method which can reduce the penetration force can also reduce dimpling and the resulting tissue …
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Increasing the safety and precision of medical tissue puncture
… needle-tissue systems there exists an optimal insertion velocity such that tissue deflection is minimized. A first-order theoretical model is developed and suggests that this optimum velocity behavior is due to increasing hydrodynamic friction forces at higher insertion velocities. From this …
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'No-touch' breast-implant insertion device
… conventional implantation. A 'no-touch' implant insertion technique has therefore been identified as the optimal method in potentially reducing CC rates. This describes an implant delivery without the implant ever touching: gloves (even during post-insertion implant orientation assessments), …
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Investigation of Needle-Tissue Interaction during Ultrasonic Needle Intervention
… actuation effects with the reduction of insertion force, needle deflection and tissue damage; (2) ultrasound perception with the ability to detect the loading condition in operation by electrical impedance and frequency change. Finally, an anaesthesia case study was performed on needle …
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Strength Capabilities and Subjective Limits for Repetitive Manual Insertion Tasks
… for automotive assembly tasks involving insertion of small parts. The study was conducted in four major parts: 1) a method of determining and evaluating subjective exertion limits was modified and tested, 2) a large dataset was collected from an industrial population in 10 simulated …