This research aims to improve ventilation protocols in critical care by using appropriate computer models that take into account the essential lung mechanics. This paper automatically tracks the boundary of individual or groups of alveoli, and converts this into a pressure volume curve for three different types of alveoli. Schiller et al. investigate the inflation and deflation of alveoli in a surfactant deactivation model of lung injury in pigs. Three different types of alveoli were tracked using dynamic ventilation data from Schiller et al. The boundaries of all the tracked alveoli compared well visually to the movies. Pressure versus area curves were derived for both inflation and deflation, they captured the expected physiological behaviour, and were qualitatively similar to the quasi-static pressure area curves derived by Schiller et al. Quantitative differences are due to the dynamic effects of ventilation which were not investigated by Schiller et al.
- Inderscience Publishers
- Image-based measurement of alveoli volume expansion in an animal ...
Toxicological and Environmental Safety Data - Case Study
IntroductionAGRAGEL is a cross-linked copolymer of acrylic acid and acrylamide partially neutralized as potassium/ ammonium salt. The polymer is in its dry form a granulate and forms a gel-like material upon addition of water or aqueous solutions. Due to the cross-linking it is insoluble in water. Uptake of water is facilitated mainly by the negative carboxylic groups of the polymer and their hydration with water molecules. Complete solubilization is hindered because of the cross-linking of different polymer...
Expect The Unexpected During Inline Inspection Runs
Over the past decade, several high profile oil and gas pipeline failures have shown that the consequences of a rupture can be extremely severe for both the environment and human life, and can result in billions of dollars in remediation costs. Because of all these negative consequences, governments have made it mandatory to conduct routine inspections on these assets to prevent catastrophic events. Today, the most common form of pipeline assessment is inline inspection (ILI) with smart pigs. These pigs flow with...
Case study - Biogas contractor and generator using Geotech’s product
The plant generates biogas from the waste water of their pig farm; the biogas is used as a means for waste to energy to make the farm self-sustainable Geotech works closely with their distributor within the Thai biogas market, currently their Thai distributor in Bangkok, Entech has delivered over 150 fixed and portable Geotech gas analysers to biogas plants throughout Thailand. The customer’s problem Kuewcharoen Engineering had been experiencing excess moisture build up in the gas analyser they used to...
Legacy tracking methods can sometimes result in false positives
Over the past decade, there have been several major pipeline failures that have had significant environmental impact. The high consequence of a rupture failure makes these pipelines some of the most regulated assets in the world. To reduce risk on these pipelines, operators use inline inspection (ILI) pigs for multiple functions, such as cleaning or assessing the condition of a pipeline, or to purge different products in a multiproduct pipeline. When owners use pigs, it is important to know their precise location...
Experiences in development and maintenance of Silence-GIS
Abstract Silence-GIS is a larse scale noise management system build as an extension on ArcGIS 9.3.1. This system has been designed and developed for the Dutch Highway Authorities. The aim of the system is to support decisions on Dutch and European noise policy and to predict the effect of future measures on the noise exposure of the population in The Netherlands. The information needed to perform noise calculations was divided over different departments. There was a great need for standardization and integration...