Obstruction and who should make the call

[Gre144]

Assume that I am the base umpire.

Everytime there is a collision in the field, I am always asking myself", what the heck just happened," I am so busy looking at the ball that I have little time to react when a collision occurs. It seems to me that 95% of the time, the home plate umpire has a better view of a collision in the field. With this in mind, shouldn't he be the one looking for the obstruction?(unless of course he has an immediate play at home)

Greg