[카테고리:] Measurement Tips

🟡 1️⃣ 기본 위치 잡기

👉 핵심: 제대정맥 → DV → IVC 흐름 찾기

✔️ 태아 복부 sagittal view 또는

✔️ 약간 oblique view

📌 찾는 순서

1. umbilical vein (UV) 확인
2. 간으로 들어가는 부분 추적
3. 그중에서 얇고 좁게 연결되는 혈관 = DV

🟡 2️⃣ DV 특징 (이걸 알아야 찾음🔥)

✔️ 다른 혈관보다 훨씬 얇음

✔️ 짧고 straight

✔️ IVC로 바로 연결

👉 쉽게 말하면

➡️ “UV에서 IVC로 shortcut 가는 혈관”

🟡 3️⃣ 컬러 도플러 활용 (필수🔥)

👉 이거 안 쓰면 찾기 힘듦

✔️ color Doppler ON

✔️ PRF 낮추기

👉 DV 특징

➡️ high velocity jet (색이 밝게 튐)

📌 포인트

“주변보다 훨씬 빠르게 흐르는 얇은 혈관”

🟡 4️⃣ Doppler waveform 보기

👉 DV 찾았으면 반드시 확인

✔️ 샘플 게이트 작게

✔️ angle 맞추기

🟡 정상 waveform

👉 triphasic

• S wave
• D wave
• a wave (forward)

🟡 이상 소견

✔️ a-wave 감소

✔️ a-wave 역류 (reversed)

👉 의미

➡️ 태아 상태 이상 가능성

🟡 5️⃣ 잘 안 보일 때 팁 (실전🔥)

✔️ probe 살짝 기울이기

✔️ fetal position 바꾸기

✔️ zoom 활용

✔️ gain 낮추기

👉 특히

➡️ 너무 깊게 잡으면 DV 안 보임

🎯 한 줄 핵심

👉 “UV 따라가면 DV 나온다”

“ductus venosus normal vs abnormal a wave reversed fetal doppler ultrasound”

🧠 Title

Fetal Ventricular Atrium Measurement at 22 Weeks | Normal Lateral Ventricle Case (5.5 mm / 6.4 mm)

📌 Meta Description

Ultrasound case of fetal lateral ventricular atrium measurement at 22+2 weeks. Both ventricles measured within normal range (Va 5.5 mm, Vp 6.4 mm). Inner-to-inner technique demonstrated.

Introduction

Accurate measurement of the fetal lateral ventricular atrium is essential during the mid-trimester anatomy scan. Ventriculomegaly is typically defined when the atrial width measures ≥10 mm.

This case demonstrates normal ventricular measurements at 22+2 weeks of gestation.

Case Information

• Gestational Age: 22+2 weeks
• Measurement Technique: Inner-to-inner caliper placement
• Va (Left ventricle): 5.5 mm
• Vp (Right ventricle): 6.4 mm

Both measurements are within normal limits (<10 mm).

Ultrasound Findings

The axial plane of the fetal head was obtained at the level of the thalami.

The atrium of the lateral ventricle was measured perpendicular to the long axis of the ventricle, ensuring proper visualization of:

• Cavum septi pellucidi
• Thalami
• Symmetrical hemispheres

No evidence of ventriculomegaly was observed.

Clinical Significance

Normal atrial width ranges between 5–10 mm during the second trimester.

Routine measurement is important for early detection of:

• Mild ventriculomegaly (10–12 mm)
• Moderate ventriculomegaly (13–15 mm)
• Severe ventriculomegaly (>15 mm)

This case represents normal physiologic findings.

Key Learning Points

✔ Always measure inner-to-inner

✔ Obtain a true axial transventricular plane

✔ Avoid oblique measurement

✔ Confirm symmetry between both ventricles

🔎

• fetal ventricle measurement
• lateral ventricular atrium
• ventriculomegaly ultrasound
• 22 week anatomy scan
• normal fetal ventricle size