Sticht & Kaferstein 20 estimated that the blood THC concentrationsproduced in a 70kg person smoking 15mg THC would peak at 7-8 minutes,after 30 minutes between 14-42ng/ml, and at 60 minutes between 7.5-14ng/ml.3.3 McBay 21 compared THC and THC-COOH levels in a study involving smokedmarijuana cigarettes.ticht & Kaferstein 20 estimated that the blood THC concentrationsproduced in a 70kg person smoking 15mg THC would peak at 7-8 minutes,after 30 minutes between 14-42ng/ml, and at 60 minutes between 7.5-14ng/ml.3.3 McBay 21 compared THC and THC-COOH levels in a study involving smokedmarijuana cigarettes.
1 Days in A/R: This figure represents the number of days of A/R outstanding, based on your average daily charge volume. 2  To calculate it, take your total current receivables (net of credits) divided by your practiceâs average daily charge amount.
By doing this, you can determine how many days your cycle is from day one to day one of the next period. Do this for each cycle, then average the numbers. For example, my last four cycles were: Cycle One - 29 days, Cycle Two - 31 days, Cycle Three - 31 days, Cycle Four - 30 days. Add up the number of days, divide by 4 months, and you get an average of 30 days. With that number, you can predict the first day of your next period when adding 30 days to the last. So, if my last period started on February 2, I add 30 days and come up with March 4 for the first day of my next period.