Hello-I learned to place ultrasound-guided PICCs several years ago using the SR 6. Switched jobs to work strictly in infusion, now I'm back with Vascular Access PRN & I'm having a horrible time seeing the needle on the 8. My preceptor has given me tons of guidance, but I can only see tissue displacement as the needle heads down. Any advice? I've played with the gain, doesn't seem to help. Thank you in advance!