Not likely to significantly affect pressure...the turbo feed is between the #4 & #5 oil squirters inside the block. It goes from the turbo straight to the pan. The feed to the main and rod bearings (primary determiner of pressure) is at the front of the motor. What will happen is you will lose oil quanity...if you have a blown seal, the biggest danger is running low on oil and trashing a bearing (can you say rod knock?).
MKIIINA is right...you need to get it fixed.