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.
In the EKG readout, the top peak is identified as âR.â To calculate an abnormal EKG, count the number of R waves in a six second strip. Then, multiply the number of R waves by ten to determine the heart rate.