WORLD JOURNAL OF ADVANCE
HEALTHCARE RESEARCH

( An ISO 9001:2015 Certified International Journal )

An International Peer Review Journal for Medical Science and Pharma Professionals
World Journal of Advance Healthcare Research (WJAHR) has indexed with various reputed international bodies like : Google Scholar , Index Copernicus , SOCOLAR, China , Research Bible, Fuchu, Tokyo. JAPAN , Cosmos Impact Factor , Scientific Indexing Services (SIS) , UDLedge Science Citation Index , International Impact Factor Services , International Society for Research Activity (ISRA) Journal Impact Factor (JIF) , IFSIJ Measure of Journal Quality , Scientific Journal Impact Factor (SJIF) , International Scientific Indexing, UAE (ISI) (Under Process) , International Impact Factor Services (IIFS) , Web of Science Group (Under Process) , Directory of Research Journals Indexing , Scholar Article Journal Index (SAJI) , International Scientific Indexing ( ISI ) , 

ISSN 2457-0400

Impact Factor  :  5.464

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Indexing

Abstract

DERIVATION, APPLICATION AND RELATIONSHIP OF TIME CONSTANT IN VENTILATOR GRAPHICS INTERPRETATION

*Dr. T. Rajini Samuel M.D

ABSTRACT

Ventilator Graphics Interpretation plays a significant role at the bedside for monitoring of mechanical ventilation. The basic mathematical model of breathing mechanics using the Equation of Motion for the respiratory system or the force balance equation consider the respiratory system as a single compartment model and the parameters like pressure, volume and flow are all continuous functions of time. Time constant is an engineering concept applied in medical field and it is relevant when modelling a process using exponential functions. The change in lung volume during inspiration and expiration is due to the variation in pressure but the process is a time consuming process. The time constant describes the speed of this process specifying how much time is required to inhale adequate tidal volume during inspiration and to exhale the tidal volume during expiration. The physical concepts of pressure gradient, resistance, compliance, frequency, tidal volume, flow and work done are required to understand the basics of mechanical ventilation. The study discuss in detail the derivation, application and relationship of time constant with other parameters in mechanical ventilation and concludes that time constant plays a significant role in understanding of the mechanical ventilation that helps in the interpretation of ventilator graphics.

[Full Text Article]