Scan Assignee Age with airSlate SignNow

Scan assignee age

[Music] today we are going to talk about a very basic but important topic in fetal ultrasound which is estimation of gestational age and assigning a correct delivery date accurate dating is very important for timing of appropriate anc care for scheduling and interpretation of different anc tests determining growth which may be less or more for the intervention purposes like deciding about preterm fetus post dataism planning for early delivery etc which are the correct methods or good methods of determination lmp of course whenever the patient comes to you for the ultrasound the first thing we ask the patient is the lmp but many times the patients are not very good at remembering the lmp it may be a delayed conception periods may be coming late so anyway the lmp is not a very good method of dating that pregnancy if it is the ivf pregnancy it is a very accurate dating from that date of embryo transfer it is in plus minus one day range if the date of ovulation is known as in follicle studies or iui is known then it is in plus minus three days range in the first trimester crl is the measurement which is used to determine the gestational age and in the second trimester it is a different parameters like bpd hc fl and ac which are used for determination of gestational age so typically when the patient comes to you for the ultrasound in the patient data entry system in that page lmp is the first thing which we feed in and then we get a gestational age we do a scan you do the biometry and then you get the average ultrasound age so early pregnancy is the most accurate for dating which is by crl and after 14 weeks it is the different measurements what we take so whenever the gestational age matches the ultrasound biometric age we assign the edt as for the lmp when the gestational age mismatches the ultrasound biometric age we assign the att as per the ultrasound age so what are these criteria of mismatch at what discrepancy we should reassign the due date is it different at different gestational age so we will see that so this chart tells us which is the acceptable range of variation between the lmp and ultrasound age so they've divided into less than 14 weeks and more than 14 weeks for the important purpose of method of measurement which is the crl before 14 weeks and after that it is the different measurements before 14 weeks it is subdivided into two groups less than nine weeks and more than nine weeks so if the pregnancy is less than nine weeks and if the discrepancy is in that five days range then it is acceptable but if you find that your crl is more than five days different than your gestational age by lmp then it is not acceptable and you should reassign the ett if the...