Parametric study of a bubble removing device for hemodialysis.

Background: This paper sets out to design a device for removing bubbles during the process of hemodialysis. The concept is to guide the bubbles while traveling through the device and eventually the bubbles can be collected. The design focuses on the analysis of various parameters i.

Effect of intermittent hydrostatic pressure on aging human chondrocyte cells.

In this study, a hydrostatic pressure chamber (HPC) is designed and developed to host chondrocyte cell culture. External stimuli such as forces, pressure, vibration etc. are found to be significant factors on upregulating the relevant proteins for constructing the extracellular matrix (ECM) during culturing.

Evaluation of Stress Distribution on Implant-Retained Auricular Prostheses: The Finite Element Method.

Purpose: The purpose of this study was to evaluate stress distribution around two craniofacial implants in an auricular prosthesis according to the removal forces. Three attachment combinations were used to evaluate the stress distribution under removal forces of 45 and 90 degrees.

Materials And Methods: Three attachment designs were examined: (1) a Hader bar with three clips; (2) a Hader bar with one clip and two extracoronal resilient attachments (ERAs); and (3) a Hader bar with one clip and two Locators.

Stress analysis of two craniofacial implants in implant retained auricular prostheses.

Implant-retained auricular prostheses require attachments to connect the implants and prostheses. Different attachments have different retention forces and hence different stress is transmitted to the implants. Splinting the implants together with a Hader bar allows the combination of different attachments with the Hader bar and allows changes in the amount and pattern of stress on the implants.

Modeling soft-tissue deformation prior to cutting for surgical simulation: finite element analysis and study of cutting parameters.

This paper presents an experimental study to understand the localized soft-tissue deformation phase immediately preceding crack growth as observed during the cutting of soft tissue. Such understanding serves as a building block to enable realistic haptic display in simulation of soft tissue cutting for surgical training. Experiments were conducted for soft tissue cutting with a scalpel blade while monitoring the cutting forces and blade displacement for various cutting speeds and cutting angles.

Determining deformation resistance in cutting soft tissue with nonuniform thickness.

Understanding soft tissue response during tool tissue interaction is important for developing a reality based haptic interaction model for surgical training and simulation. In this work, experiments were conducted to cut liver specimens with nonuniform thickness. Three cutting speeds ranging from 0.

Study of soft tissue cutting forces and cutting speeds.

A versatile equipment to study the cutting of soft tissue with surgery scalpel was designed and constructed. Experiments were performed with pig liver (ex-vivo) to measure the blade-tissue interaction forces at cutting speeds ranging from 0.1 cm/sec-2.

Measuring forces in liver cutting: new equipment and experimental results.

We are interested in modeling the liver cutting process as accurately as possible by determining the mechanical properties experimentally and developing a predictive model that is self-consistent with the experimentally determined properties. In this paper, we present the newly developed hardware and software to characterize the mechanical response of pig liver during (ex vivo) cutting. We describe the custom-made cutting apparatus, the data acquisition system, and the characteristics of the cutting force versus displacement plot.