Table 1 Perfusion of placentae (n = 24) including two phases in a crossover system
From: The impact of cocaine and heroin on the placental transfer of methadone
Protocol | n | Phase I (2 hours) | Phase II (2 hours) |
|---|---|---|---|
A | 3 3 | m + antipyrine m + antipyrine | m + antipyrine m + antipyrine |
B | 3 3 | m + antipyrine m + antipyrine + methadone | m + antipyrine + methadone m + antipyrine |
C | 3 3 | m + antipyrine m + antipyrine + methadone + cocaine | m + antipyrine + methadone + cocaine m + antipyrine |
D | 3 3 | m + antipyrine m + antipyrine + methadone + heroin | m + antipyrine + methadone + heroin m + antipyrine |