A New Device for Autologous Small Volume Fat Grafting

Background Many techniques and devices have been developed to improve small volume fat grafting efficiency and consistency for use in the operating room and outpatient procedure room. These methods require cumbersome or messy processing to remove excess oil and fluid from adipose graft. Objectives The aim of this study was to compare fat processing efficiency of a novel hand-held device, the Push-to-Spin (P2S™) system, to other common processing techniques and validate tissue quality after lipoaspirate processing. Methods Human lipoaspirate samples were processed using one of three experimental methods, including cotton gauze (Telfa) rolling, centrifugation (Coleman technique), or using the P2S™ system. Efficiency of fat processing was evaluated by total processing time, fat harvest ratio, and fat processed ratio. Histological examination and immunohistochemical staining were used to compare tissue morphology and adipocyte viability, respectively. Experimental samples were compared to unprocessed lipoaspirate controls. Results Lipoaspirate processing was significantly faster using the P2S™ device compared with other techniques. All three methods achieved similar fat harvest and fat processing ratios. Additionally, the P2S™, Telfa, and Coleman techniques yielded grafts with similar cellularity, and perilipin and GPDH expression. Measured differences between experimental and control samples were statistically significant. Conclusions The P2S™ device is an easy, efficient, and potentially cost-effective handheld device that can be used for lipoaspirate harvest, processing, and grafting in any procedural setting. The resulting adipocytes have similar morphology, viability, and function to those yielded by techniques. This handheld technology decreases procedure time, thereby improving surgeon efficiency and patient experience.

A Handheld Technology for Optical Monitoring of Transcutaneous Blood Oxygen Saturation

This paper presents the use of a handheld technology for noninvasive prediction of one’s transcutaneous blood oxygen saturation, StO2, via an in-house developed skin oxygenation system. The quantification strategy involved the use of wavelength dependent Modified Lambert Beer law and is based on light signals of wavelengths 532 nm, 560 nm and 650 nm reflected from the selected skin site. This study performed at rest and arterial blood occlusion experiment on left palm of the hand of five healthy Asian volunteers to evaluate the performance of the system and to verify the validity of the predicted results. The preliminary results revealed a considerable decrease in the predicted mean percent StO2 value from 63.7 ± 13.2 % for at rest condition to 52.2 ± 11.4 % after a pressure of 140 mmHg was applied on upper left arm of these recruits for 120 seconds. This work concluded that the developed optical system is able to provide comprehensive information on spatially dependent StO2 and it has unlimited skin access, hence may be potentially used in field applications to assess the skin oxygen level of those in workforce whose job is at risk of exposure to poisonous gases.

Readiness as a Novel Construct of Readiness Acceptance Model (RAM) for the Wireless Handheld Technology

In this conceptual chapter we have reviewed prominent theories or models in relation to the adoption of technology for wired devices. We have identified shortcomings in these leading models in predicting adoption behaviour associated with the wireless technology. The shortcomings are particularly acute in wireless handheld technology by comparison with desk top technology in which the adoption models have been extensively studied. Here we propose “Readiness Acceptance Model” (RAM) as new conceptual model for the adoption of ICT in conjunction with wireless handheld technology. Readiness is defined as user's ability to perceived readiness of the business in the context of organizational, technological, perceptional, behavioural, and environmental attributes for the acceptance of wireless handheld devices. In formulating the conceptual framework for RAM we incorporated variable characteristics from the nine prominent models reviewed here. We believe these considerations would allow RAM to be useful in wireless handheld technology ICT domains.