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Exam Requirements: Obstetrical Ultrasound (Revised 11-10-2022)


The Obstetrical module includes accreditation for any one trimester, any combination of two trimesters, or all three trimesters:

  • All three trimesters: One exam for each trimester is required. 

  • Trimester Specific: Your site will only be accredited in the specific trimester(s) you select. Required exams for trimester specific obstetrical are as follows: 

    • One trimester only (1st, 2nd, or 3rd):  Two exams (if 1st trimester, both must be transvaginal) 

    • Any combination of two trimesters: One exam of each trimester (if 1st trimester is selected, exam must be transvaginal) 

When submitting obstetrical images, choose examinations of a gestational age that allow all anatomy to be well demonstrated, as directed by the dating guidelines in the trimester specific Exam Requirements.


Complete documentation/survey means a series of several images throughout the entire organ in two planes. For example, from one side of the organ to the other in the longitudinal plane and from superior to inferior in the transverse plane. 


Anatomy should be intentionally imaged in an organized fashion and correctly labeled for clarity. 


Exam Requirements: Obstetrical Ultrasound Accreditation

1st Trimester Transvaginal (Must be between 6-12 weeks)

All requirements MUST be imaged transvaginally. Only transvaginal images will be reviewed. 

  • MUST include an embryo/fetus with cardiac activity

  • Documentation of the gestational sac

  • Documentation of the yolk sac

  • Documentation of the embryo/fetus without measurement

  • CRL measurement

  • Cardiac motion with M-mode

  • Uterus

  • Complete documentation in longitudinal 

    • At least three gray scale images to include right lateral, mid without measurement, left lateral

  • Complete documentation in transverse 

    • At least three gray scale images to include lower uterine segment, body without measurement, fundus

  • Ovaries

  • Complete documentation of both ovaries in longitudinal
    • At least two distinctly different gray scale images of each ovary without measurements or color/spectral Doppler

  • Complete documentation of both ovaries in transverse

    • At least two distinctly different gray scale images of each ovary without measurements or color/spectral Doppler

  • Size-length, height (AP), width

OR

  • Longitudinal gray scale cine clip from medial to lateral throughout both ovaries

  • Transverse gray scale cine clip from superior to inferior throughout both ovaries

  • At least one static longitudinal gray scale image of each ovary without measurements or color/spectral Doppler

  • At least one static transverse gray scale image of each ovary without measurements or color/spectral Doppler

  • Size - length, height (AP), width

       2nd Trimester (MUST be between 18 and 26 weeks)

  • Fetal presentation/position

  • Amniotic fluid documentation

  • Placental location

  • Placental relation to the internal cervical os

  • Fetal measurements

    • Biparietal diameter

    • Head circumference

    • Abdominal circumference

    • Femur length

  • 4 chamber view of heart

  • Cardiac motion with M-mode

  • Right ventricular outflow tract (RVOT) - static image OR cine clip

  • Left ventricular outflow tract (LVOT) - static image OR cine clip

  • Cerebral ventricles

  • Cerebellum

  • Cisterna magna

  • Nose/lips

  • Stomach

  • Kidneys

  • Urinary bladder

  • Umbilical cord insertion into fetal abdomen

  • Umbilical cord vessel number

  • Spine in longitudinal and transverse

    • Cervical

    • Thoracic

    • Lumbar

    • Sacral

  • All 4 extremities

  • Maternal anatomy

    • Cervix with measurement

    • Uterus

    • Adnexa

3rd Trimester (MUST be greater than 26 weeks)

  • Fetal presentation/position

  • Amniotic fluid measurement (AFI or MVP)

  • Placental location

  • Placental relation to the internal cervical os

  • Fetal measurements

    • Biparietal diameter

    • Head circumference

    • Abdominal circumference

    • Femur length

  • 4 chamber view of heart

  • Cardiac motion with M-mode

  • Stomach

  • Kidneys

  • Urinary bladder



Revision History for this Article

Date

Section

Description of Revision(s)

12-12-19

All

Article created; FAQs incorporated; No criteria changes

12-17-19!st TrimesterAdded "including size-length, AP, width" to the complete documentation of both ovaries in longitudinal and transverse
12-17-192nd Trimester and 3rd TrimesterAdded cardiac motion with M-mode
1-27-20201st TrimesterClarified 1st bullet and included "Must" be between 6-12 weeks.
6-2-2020
Added complete documentation description
8-3-2020
Added further description of complete documentation for 1st trimester Endovaginal study
2-19-20211st Trimester EndovaginalAdded requirements for submissions after March 1, 2021
2-24-2021Requirements for submissions after March 1, 2021Edited complete documentation of uterus
1-21-20221st Trimester, 2nd Trimester and 3rd TrimesterUpdated exam requirements
2-4-20222nd and 3rd TrimesterAdded missing requirements from last update
5-10-20221st Trimester Endovaginal
Moved "Size-length, height (AP), width bullet to align with complete documentation
11-10-20221st Trimester Transvaginal
Changed endovaginal to transvaginal



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