Biomaterial Database

Anesthetic gas concentration changes related to the temperature and humidity in high and low flow anesthesia. 2009

Mana Sezdi, and Aydin Akan, and Fatih Tank

Biomedical Engineering Institute, Bogazici University, Istanbul, TURKEY. mana@istanbul.edu.tr

The objective of this study, is to investigate the effects of the temperature and the humidity to the amount of anesthetic gas output from the vaporizer in both high and low flow anesthesia, and to attract attention to this relationship during the delivery of anesthesia and the calibration measurements. The performance of the anesthesia vaporizer (isoflurane and sevoflurane) was evaluated in both high and low flow anesthesia, and it was investigated whether the vaporizer supplied the preset amount of anesthetic to the patient. Then, through changing the temperature of the anesthetic device between 20 and 36 degrees C, and through changing the humidity between 20% and 42%, the changes in the gas concentration were measured. After measurements, the results were studied statically. For high and low flow anesthesia, the regression equations were obtained and it was seen that these equations were acceptable.

UI	MeSH Term	Description	Entries
D008956	Models, Chemical	Theoretical representations that simulate the behavior or activity of chemical processes or phenomena; includes the use of mathematical equations, computers, and other electronic equipment.	Chemical Models,Chemical Model,Model, Chemical
D009330	Nebulizers and Vaporizers	Devices that cause a liquid or solid to be converted into an aerosol (spray) or a vapor. It is used in drug administration by inhalation, humidification of ambient air, and in certain analytical instruments.	Atomizers,Inhalation Devices,Inhalators,Inhalers,Vaporizers,Nebulizers,Vaporizers and Nebulizers,Atomizer,Device, Inhalation,Devices, Inhalation,Inhalation Device,Inhalator,Inhaler,Nebulizer,Vaporizer
D003198	Computer Simulation	Computer-based representation of physical systems and phenomena such as chemical processes.	Computational Modeling,Computational Modelling,Computer Models,In silico Modeling,In silico Models,In silico Simulation,Models, Computer,Computerized Models,Computer Model,Computer Simulations,Computerized Model,In silico Model,Model, Computer,Model, Computerized,Model, In silico,Modeling, Computational,Modeling, In silico,Modelling, Computational,Simulation, Computer,Simulation, In silico,Simulations, Computer
D004867	Equipment Design	Methods and patterns of fabricating machines and related hardware.	Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D006813	Humidity	A measure of the amount of WATER VAPOR in the air.	Humidities
D012212	Rheology	The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.	Flowmetry,Velocimetry,Velocimetries
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures
D015233	Models, Statistical	Statistical formulations or analyses which, when applied to data and found to fit the data, are then used to verify the assumptions and parameters used in the analysis. Examples of statistical models are the linear model, binomial model, polynomial model, two-parameter model, etc.	Probabilistic Models,Statistical Models,Two-Parameter Models,Model, Statistical,Models, Binomial,Models, Polynomial,Statistical Model,Binomial Model,Binomial Models,Model, Binomial,Model, Polynomial,Model, Probabilistic,Model, Two-Parameter,Models, Probabilistic,Models, Two-Parameter,Polynomial Model,Polynomial Models,Probabilistic Model,Two Parameter Models,Two-Parameter Model
D018685	Anesthetics, Inhalation	Gases or volatile liquids that vary in the rate at which they induce anesthesia; potency; the degree of circulation, respiratory, or neuromuscular depression they produce; and analgesic effects. Inhalation anesthetics have advantages over intravenous agents in that the depth of anesthesia can be changed rapidly by altering the inhaled concentration. Because of their rapid elimination, any postoperative respiratory depression is of relatively short duration. (From AMA Drug Evaluations Annual, 1994, p173)	Inhalation Anesthetic,Inhalation Anesthetics,Anesthetic Gases,Anesthetic, Inhalation,Gases, Anesthetic
D019544	Equipment Failure Analysis	The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.	Materials Failure Analysis,Prosthesis Failure Analysis,Analysis, Equipment Failure,Analysis, Materials Failure,Analysis, Prosthesis Failure,Analyses, Equipment Failure,Analyses, Materials Failure,Analyses, Prosthesis Failure,Equipment Failure Analyses,Failure Analyses, Equipment,Failure Analyses, Materials,Failure Analyses, Prosthesis,Failure Analysis, Equipment,Failure Analysis, Materials,Failure Analysis, Prosthesis,Materials Failure Analyses,Prosthesis Failure Analyses