Obstetrical EDE Flashcards
What is the external landmark for the abdominal obstetrical EDE?
midline just cephalad to symphysis pubis
What is the internal landmark for the abdominal obstetrical EDE?
bladder
What is the area of interest for the abdominal obstetrical EDE?
Pregnancy: Uterus / endometrial stripe
Free fluid: Recto-uterine and vesico-uterine spaces
Outline the 3-2-1 rule to declare an intrauterine pregnancy.
Pregnancy Criteria (3)
Intrauterine Criteria (2)
Safety Criteria (1)
Describe the three criteria to confirm a pregnancy.
Pregnancy Criteria (3)
1. Decidual reaction
2. Gestational sac
3. Yolk sac or fetal pole with visible fetal heart
Describe the two criteria to confirm an IUP.
Intrauterine Criteria (2)
1. Bladder-uterine juxtaposition. At least one image must clearly show the bladder and uterine tissue in direct contact.
2. Vaginal-uterine continuity. In the longitudinal view, the vagina must be shown to transition directly into uterine tissue.
Describe the safety criteria (1) to ensure that an IUP is in a safe location within the uterus.
Safety Criteria (1)
1. Adequate myometrial mantle. The shortest distance between the inner edge of the gestational sac and the outer edge of the uterus must be at least 8 mm. This distance can be estimated by comparing it to the centimeter markers on the ultrasound screen. In equivocal cases, the distance should be precisely measured using the electronic calipers.
PLUS
- Visible fetal heart rate greater than 100 beats per minute.
Describe a negative scan for pelvic free fluid.
Adequate visualization and complete sweep of the vesico-uterine and the recto-uterine spaces, in both the longitudinal and transverse planes, without evidence of free pelvic fluid.
Describe a positive scan for pelvic free fluid.
Positive for pelvic free fluid: Longitudinal or transverse view of free pelvic fluid in the vesico-uterine or the recto-uterine space
What does IUP mean?
intrauterine pregnancy (IUP)
What does LIUP mean?
live intrauterine pregnancy (LIUP)
What does NDIUP?
no definite intrauterine pregnancy (NDIUP)
What is the name of the probe that should be used for a transvaginal obstetrical scan?
endocavitary probe
What are the two probe orientations utilized in a transvaginal ultrasound?
Sagittal – Probe held parallel to stretcher / floor with the beam directed towards the patient’s head and the probe marker oriented towards the ceiling.
Coronal – Probe held parallel to stretcher / floor with the beam directed towards the patient’s head and the probe marker oriented towards patient right.
What is the external landmark for a transvaginal obstetrical scan?
introitus
