Study Time ATPS

Well I have this huge midterm coming up and its all about the medical gas therapy. It consists of ATPS, BTPS, STPD. I don’t think we will ever use this because the ventilators do it automatically but its also good to know. If anything happens then you can always come back and calculate it. For ATPS it is the Ambient Temperature Pressure Saturated. This is bascially room temperature and you will need to use the Combined Gas Law. 3 LAws into one. which is Boyle’s Law, Gay Lussac law, and Charles Law. Bascially it is

p1 v1  / t1 = p2,v2 / t2

Remember that ATPS is  the outside temperature, pressure , volume. So this will be around room temperature which is 20-25C. First you will need to get P1 which is in mmHg units. V1 would be in Liters. T1 would be in Celsius. For T1 you will need to add 273K because we need Kelvin units instead of Celsius. Then water vapor would be the temperature and there is a chart. For example if it was 37 C there will be a chart saying how much water vapor. In this gas 37 = 47mmHg. You will take the p1 (  - 41mmHg).  That is how you get the ATPS. This will alwyas be given to you. It is so hard to type it and explain it but this is the best I can. I will update this more if I ever get the chance. I am in a studying situation so this is only a short post.

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