MPH examples [BE/BA News]

posted by d_labes  – Berlin, Germany, 2012-03-07 17:18 (5213 d 14:56 ago) – Posting: # 8226
Views: 28,045

Dear Helmut!

Thanx for that answer. Elaborate and concise as always.

❝ ... ‘partial Cmax’ (hey – a new term!)

:clap: Excerpt from my next report: "We have evaluated the partial Cmax according to Schütz ..." :-D

❝ It might well be that a couple of subjects show a tmax,0-4 at 4 h despite there was a decrease from an earlier peak or there is no clearly defined peak in one of the two sections at all.


In the extremal case this would mean that the Cmax values are the same in both phases! See the red curve of your example picture.

❝ would be nice to know how these guys deal with it. :-D


Me too.

❝ ❝ BTW: I can't see any return of clinical reasoning in the EMA Q&A.

❝ ❝ "The identification of this cut-off time point should aim to describe the plasma concentrations in the first phase ... :blahblah:".


❝ Hhm. I don’t get your point here. Can you elaborate?


Your cut-off point T=4 h is driven by clinical reasoning I think, like the arguments in the linked presentation?

I worry that the sentence in the Q&A calls for a cut point that is solely driven by the separation of the two phases in the concentration time courses. This would lead in the example courses you have given to T somewhere between 2-3h.

But eventually I'm too anxiety psychotic regarding taking guidances literally :surprised: (me sitting in front of a snake).

Regards,

Detlew

Complete thread:

UA Flag
Activity
 Admin contact
23,654 posts in 4,992 threads, 1,571 registered users;
146 visitors (0 registered, 146 guests [including 22 identified bots]).
Forum time: 09:14 CEST (Europe/Vienna)

Always listen to experts.
They’ll tell you what can’t be done and why.
Then do it.    Robert A. Heinlein

The Bioequivalence and Bioavailability Forum is hosted by
BEBAC Ing. Helmut Schütz
HTML5