Skip to main content

OSATS, basic ultrasound assessment of fetal size, liquor and the placenta

This page sets out the OSATS requirements for the basic ultrasound assessment of fetal size, liquor and the placenta module

You have to be competent in:

Fetal measurement, lie and presentation

  • Counsel patient about procedure
  • Appropriate probe selection and machine set-up/operation
  • Confirm fetal heartbeat
  • Establish lie
  • Establish presentation
  • Measure BPD transabdominally*
  • Measure FL transabdominally*
  • Measure HC transabdominally*
  • Measure AC transabdominally*
  • Communicate results and uncertainties to patients
  • Complete a structured ultrasound report
  • Discuss appropriate referral if indicated
  • Ensure images/video are recorded according to local protocol

*Competence to the level of independent practice is not required for these parameters

Liquor assessment (AFI and maximum pool depth)

  • Counsel patient about procedure
  • Appropriate probe selection and machine set-up/operation
  • Confirm fetal heartbeat
  • Assess fetal lie and presentation
  • Measure amniotic fluid volume: maximum vertical pool depth
  • Measure amniotic fluid volume: AFI
  • Communicate results to patient
  • Complete a structured written ultrasound report
  • Arrange appropriate referral follow-up

Placental assessment

  • Counsel patient about procedure
  • Appropriate probe selection and machine set-up/operation
  • Confirm fetal heartbeat
  • Assess fetal lie and presentation
  • Determine placental position - transabdominally
  • Communicate results to patient
  • Complete a structured written ultrasound report
  • Arrange appropriate referral follow-up

Forms

Elsewhere on the site

Information about OSATS
Find out more about the OSATS and how to use them in your training
Ultrasound resources
Resources to help support your ultrasound training