Normal 1st Trimester Ultrasound

[@haitianhearts]

Your wisdom, even beyond ultrasound, is appreciated!

[@kylecarvalho3623]

1) How do we know on a machine we've never used that u measure 1 or 2 cycles on M Mode? 2) at what week does CRL become phased out? I believe at week 12 from what I recall on most machines I've used. (General/vascular tech here that's done only vascular for the last 5 yrs)

[@MetroHealthEmergencyUltrasound]

Sometimes it tells you in the calculator. Otherwise you measure between peaks and see what number you get and see if it makes sense. If you measure every beat on a machine that does every beat, your rate will be 2x. Same and opposite if you measure every 2 beats on a machine that measures every beat.

[@EliseteAlmeida-s4v]

Elisete