Why does Transonic Systems recommend a PSB probe over a PSL probe for most acute studies?

Whilst the PSB and PSL flow probes only differ in their cable orientations, which is less of an issue for acute studies, the PSB probes have a 'handle' on the cable which allows for much easier cable manipulation, simplifying implantation and explantation for these short-term studies. 
Comparatively, the PSL orientation is much more suited to tunneling, and therefore recommended for chronic applications. A PSL probe may be used for acute studies, but this is for the user to decide.