Its quite possible to receive and transmit at the same time. Many of the hands-on healing techniques do this. Most receive from above or below while sending from the hands, but its possible to choose other access points. Some people also do this to 'flush' their energy system.

I recently experienced sending and receiving from a single palm (to another experienced energy worker's palm) at the same. It felt like a ring around a circle. There is no reason in principle that it can't be done from another single point.