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Blood Flow Assessment · IUGR Monitoring · Mayflower Clinic Nagpur

Doppler Scan in Nagpur
(Pregnancy Colour Doppler)

The Doppler scan is the most powerful tool available for assessing whether your baby is receiving adequate blood supply from the placenta. At Mayflower Fetal Medicine Centre, every Doppler scan is interpreted personally by Dr. Kunda Shahane — Central India's first fetal medicine specialist — using the GE Voluson Signature Expert with Graphicflow vessel mapping.

Dr. Kunda Shahane MBBS, MS (Obs & Gynae), FIFM, FMF (London) Central India's First Fetal Medicine Specialist · 20,000+ fetuses evaluated
📞 Call: 0712-669-2706 💬 WhatsApp 📅 Book Appointment
Quick Scan Facts
Also calledColour Doppler, Pregnancy Doppler, Umbilical Doppler, MCA Doppler
Timing24 weeks onwards (uterine artery from 11 weeks)
Vessels assessedUmbilical artery, MCA, ductus venosus, uterine arteries
Duration20–40 minutes
MachineGE Voluson Signature Expert
Special techGraphicflow 3D vessel mapping
PCPNDTFully compliant

What is a Pregnancy Doppler Scan?

A Doppler scan uses ultrasound to measure the speed and resistance of blood flowing through specific blood vessels in the baby and the placenta. It tells Dr. Kunda Shahane not just how big the baby is, but how well the placenta is supplying that baby with oxygen and nutrients — and how the baby's body is responding to any supply challenge.

In a normal, healthy pregnancy the placenta offers very low resistance to blood flow — blood moves freely throughout the cardiac cycle. When the placenta is not functioning well (placental insufficiency), resistance rises, and the pattern of blood flow changes in measurable, predictable ways that signal the degree of fetal compromise — from early warning to critical emergency.

Why Doppler matters in IUGR: A growth scan can tell you a baby is small. Only Doppler can tell you why — and how urgently action is needed. The Doppler findings directly determine the timing of delivery in IUGR pregnancies. This is a clinical decision tool, not just a surveillance scan.

Who Needs a Doppler Scan?

Doppler scan is indicated for any pregnancy with potential placental insufficiency, growth restriction, or fetal wellbeing concerns. Dr. Kunda Shahane recommends Doppler scan for the following situations:

📏
Small baby / suspected IUGRFetal measurements below the 10th percentile on growth scan — Doppler determines the cause and urgency
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Hypertension or pre-eclampsiaMaternal high blood pressure significantly increases the risk of placental insufficiency and IUGR
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Gestational or pre-existing diabetesDiabetes can cause both macrosomia and, in vascular cases, placental compromise
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Rh incompatibility / fetal anaemia suspicionElevated MCA peak systolic velocity is the non-invasive marker for fetal anaemia, guiding the decision for intrauterine blood transfusion
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Twin pregnancy (especially monochorionic)TTTS, selective IUGR, and twin anaemia-polycythaemia sequence are all monitored with serial Doppler
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Reduced fetal movementsDecreased fetal movement can be an early sign of placental insufficiency — Doppler provides objective assessment
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Oligohydramnios (reduced amniotic fluid)Low fluid often signals renal underperfusion due to placental compromise — Doppler confirms the mechanism
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Uterine artery Doppler at 11–14 weeksEarly screening for pre-eclampsia risk as part of first trimester combined screening, before symptoms develop
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History of previous stillbirth or IUGRHigh-risk pregnancies with prior adverse outcomes require proactive Doppler surveillance from 24 weeks
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Post-intrauterine transfusion monitoringMCA Doppler guides timing of repeat fetal blood transfusions in cases of severe fetal anaemia

The Four Doppler Vessels — What Each Tells Dr. Kunda Shahane

Each vessel assessed by Doppler gives different, complementary information. Together, they form a complete picture of fetoplacental wellbeing. The table below shows exactly what each vessel measures, what normal looks like, and what different abnormal patterns mean clinically.

VesselWhat is MeasuredNormal FindingAbnormal FindingClinical Significance
🔵 Umbilical ArteryBlood flow resistance from baby to placenta. Expressed as pulsatility index (PI) and systolic/diastolic (S/D) ratioForward flow throughout cardiac cycleLow resistance (PI within normal range)High PI / high resistanceAbsent end-diastolic flow (AEDF)⚠ Reversed end-diastolic flow (REDF)Indicates placental vascular resistance. AEDF = significant compromise. REDF = near-critical — typically warrants hospitalisation and early delivery planning
🟣 Middle Cerebral Artery (MCA)Blood flow velocity and resistance to the fetal brain. Expressed as peak systolic velocity (PSV) and MCA PINormal PSV for gestationNormal MCA PI (high resistance = normal)Elevated MCA PSV → fetal anaemiaLow MCA PI (brain-sparing) → placental insufficiencyElevated PSV: used to diagnose fetal anaemia and time blood transfusion. Low PI (brain-sparing): fetus redirecting blood to brain — sign of haemodynamic compromise in IUGR
🔴 Ductus Venosus (DV)Venous return from placenta to fetal heart. Waveform has characteristic 3-phase pattern including A-wave (atrial contraction)Positive A-wave (forward flow during atrial contraction)Absent A-wave⚠ Reversed A-waveThe most sensitive marker of cardiac decompensation in IUGR. Reversed A-wave = imminent fetal acidosis. Also used in first trimester to screen for chromosomal anomalies when NT is elevated
🟡 Uterine ArteryMaternal blood supply flowing from uterine arteries into the placental bed. Waveform shape and resistance assessed bilaterallyLow resistance flowNo early diastolic notchHigh resistance (elevated PI)Bilateral early diastolic notchingAbnormal uterine artery Doppler at 11–14 weeks predicts pre-eclampsia, IUGR, and placental abruption risk. Enables early aspirin prophylaxis before symptoms develop

The IUGR Doppler Escalation Pathway

In cases of IUGR, Doppler abnormalities follow a predictable sequence of escalation. Dr. Kunda Shahane tracks this progression to determine the optimal timing of delivery — balancing the risks of prematurity against the risk of fetal compromise.

Stage 1 — Early Warning

High umbilical artery PI. Fetus compensating adequately. Serial monitoring intensified to every 2 weeks.

Stage 2 — Brain Sparing

Low MCA PI (brain-sparing). Baby redirecting blood to brain. Monitoring intensified to weekly. Hospital review considered.

Stage 3 — Absent AEDF

No forward flow in diastole. Ductus venosus assessed. Hospital admission usually recommended. Delivery timing discussed.

Stage 4 — Critical

Reversed umbilical flow or reversed DV A-wave. Cardiac decompensation imminent. Delivery typically indicated at appropriate gestational age.

GE Voluson Signature Expert — Graphicflow Vessel Mapping

Doppler scans at Mayflower Clinic are performed on the GE Voluson Signature Expert — the global reference platform for fetoplacental Doppler assessment. Its Graphicflow technology elevates Doppler from a functional measurement to a complete 3D vascular map.

GE Voluson Signature Expert — Doppler Technologies

Every Doppler scan at Mayflower Clinic uses the full capability of the GE Voluson Signature Expert for maximum diagnostic accuracy.

Graphicflow 3D Vessel MappingRenders fetal and placental blood vessels in three dimensions — showing the complete vascular architecture of the cord, placental insertion, and fetal circulation. Makes subtle abnormalities visible that 2D colour Doppler alone may miss.
High-Definition Colour DopplerSuperior spatial resolution and frame rates compared to standard Doppler systems — detecting low-velocity flow in small vessels with greater sensitivity and fewer aliasing artefacts.
Pulsed-Wave Doppler Waveform AnalysisPrecise quantitative measurement of PI, RI, and S/D ratios in every target vessel, with reference range charts automatically applied for gestational age — supporting evidence-based clinical decisions.
Combined Growth + Doppler in One SessionThe GE Voluson Signature Expert performs biometric measurements and full Doppler assessment in the same appointment — providing a complete clinical picture without requiring a second visit.

Safety & Preparation

Is the Doppler scan safe?

Yes. Colour Doppler ultrasound uses sound waves, not radiation. It is completely safe for both mother and baby. There are no known harmful effects of diagnostic Doppler ultrasound at the power levels used for obstetric assessment. Doppler has been used routinely in obstetric care for over three decades with an excellent safety record.

How to prepare for your Doppler scan

  • No fasting required. Eat and drink normally before your scan.
  • Bladder: A moderately full bladder is helpful — drink 2–3 glasses of water 30 minutes before.
  • Bring your reports: Previous scan reports, growth scan results, recent blood pressure readings if hypertensive, and your antenatal card.
  • Allow 30–45 minutes. Doppler waveform assessment requires the baby to be in a quiet state — if the baby is very active, the scan may take longer.
  • Serial Doppler: If you are on a monitoring programme, please come for each scheduled Doppler on the advised date — the intervals are clinically determined.

Frequently Asked Questions

My doctor said my baby is small — does that automatically mean IUGR?

Not necessarily. A baby measuring below the 10th percentile may be constitutionally small (a small but healthy baby with normal placental function) or may be growth-restricted (small because the placenta is not supplying enough nutrients). Doppler is the key tool that distinguishes between these two situations. Normal Doppler findings in a small baby are very reassuring — abnormal findings indicate true IUGR requiring management.

What does "brain-sparing" mean on my Doppler report?

Brain-sparing means the fetus has redistributed its blood flow to prioritise the brain over other organs — a sign that the baby's brain is under stress from reduced placental supply. It is detected as an abnormally low MCA pulsatility index (resistance is reduced because more blood is flowing to the brain). Brain-sparing is a significant finding that indicates haemodynamic compromise in an IUGR baby and usually warrants closer monitoring and delivery planning.

My umbilical Doppler is abnormal — will my baby be delivered early?

Not necessarily, and not immediately. The decision on timing of delivery depends on the degree of Doppler abnormality, gestational age, other fetal wellbeing markers (biophysical profile, estimated weight), and the overall clinical picture. Mildly elevated umbilical artery PI is managed with serial monitoring. Absent or reversed end-diastolic flow is a more serious finding that typically warrants hospital admission and expedited delivery planning. Dr. Kunda Shahane will explain exactly what your specific finding means and what the next steps are.

What is MCA Doppler for fetal anaemia?

When a fetus is anaemic, its heart pumps faster to compensate — and blood flows faster through the middle cerebral artery. MCA peak systolic velocity (PSV) is therefore elevated in fetal anaemia. Dr. Kunda Shahane uses this non-invasive marker to determine whether an intrauterine blood transfusion is needed, and to time repeat transfusions after the first one. Mayflower Clinic is one of very few centres in Central India where intrauterine blood transfusion for fetal anaemia is performed.

How often will I need Doppler scans if I have IUGR?

The frequency depends on the severity of findings. Early IUGR with mildly elevated umbilical Doppler may be monitored every 2 weeks. More significant IUGR with absent end-diastolic flow may require weekly or even twice-weekly assessment. Ductus venosus Doppler monitoring is added when umbilical artery findings deteriorate. Dr. Kunda Shahane will give you a personalised monitoring schedule based on your specific findings and gestational age.

Can uterine artery Doppler predict pre-eclampsia?

Yes. Abnormal uterine artery Doppler — particularly bilateral early diastolic notching and elevated resistance — at 11–14 weeks is one of the strongest predictors of pre-eclampsia and IUGR. When combined with maternal blood pressure, uterine artery Doppler, and maternal biomarkers (PAPP-A, PlGF), the first trimester pre-eclampsia screen can identify over 75% of cases that will develop pre-eclampsia before 37 weeks — enabling early aspirin prophylaxis to reduce the risk.

Doctor's Note — Dr. Kunda Shahane

"Doppler is the language the placenta speaks when it is under stress. What I am listening for in every waveform is how hard the baby is working to compensate, and how much reserve is left. A baby with absent diastolic flow in the umbilical artery is already working at the edge of its capacity. A baby with reversed flow is at the edge of that edge. The Doppler findings tell me, with precision, when waiting is still safe and when it is not. In my experience managing complex IUGR cases over nearly two decades, it is the Doppler — not the growth chart alone — that has saved lives."

Dr. Kunda ShahaneMBBS, MS (Obs & Gynae), FIFM, FMF (London) · Central India's First Fetal Medicine Specialist
⚖️ PCPNDT Act 1994 — Mandatory Compliance Notice

Mayflower Fetal Medicine & High-Risk Pregnancy Centre strictly complies with the PCPNDT Act 1994. All Doppler and ultrasound services are performed exclusively for lawful medical indications. Disclosure of fetal sex is illegal and is not performed at this centre.

Medical Disclaimer: This page is for patient education only and does not constitute medical advice or treatment. Doppler findings must be interpreted in the full clinical context. Consult Dr. Kunda Shahane for advice specific to your pregnancy. In an emergency contact your nearest hospital immediately.