Don, It does only if you can obtain it at zero degrees. If you can obtain it at zero why shift to the 45? Im my opinon ( and its not much) the AP angles tend to be closer to 60, and the flank zero. With this said, what if you can not insonate the full artery from the flank and closer to zero due to limitations. And the only obtainable signal is from the midline and at 60, is the study invalid? I think its a tit for tat question. If all the other factors apply, post stenotic turbulece, SRT, and as N. Garbani pointed out whats the difference between 300 and 350 cm sec in the abdomin, nothing!! Just a point to argue.
> Date: Sat, 15 Sep 2007 09:26:01 -0700
> From: [log in to unmask]
> Subject: Re: Those darn Doppler angles again
> To: [log in to unmask]
> Let me clarify:
> You're getting the distal renal artery from the flank approach, and the true angle is pretty much 0 degrees regardless of changes of approach. Does setting the cursor at 45 degrees not overestimate velocity?
> To be sure, you want to see the localized acceleration and turbulence; this is just a point of technique.
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