Vascular Ultrasound Screening

This service has absorbed what used to be a separate general "vascular screening & diagnosis" page, because in practice patients rarely need just one test — they need a coordinated look at the vessels that matter for their specific risk profile. A comprehensive visit at Renova Century Hospital can include arterial duplex of the legs, venous duplex, carotid Doppler of the neck, an abdominal aortic scan and an ABI, all performed in the same sitting by Dr. Sharma herself.

Rather than being sent to a radiology centre for a generic scan and returning days later for interpretation, the same specialist who scans you also examines you, correlates findings with your symptoms, and explains what they mean immediately. This single-visit model removes the biggest weakness of outsourced imaging — a report without clinical context — and is especially valuable for patients travelling from outside Hyderabad who cannot make multiple trips.

Duplex ultrasound combines standard grey-scale imaging (to see the vessel wall and any plaque or clot) with colour Doppler (to see the direction and speed of blood flow) in one probe pass. For arteries, this reveals narrowings caused by atherosclerotic plaque and grades their severity by how much the flow velocity increases as blood squeezes through the tight segment. For veins, it reveals whether the delicate one-way valves are closing properly or allowing blood to leak backward — the root cause of varicose veins — and can directly visualise a clot inside a deep vein.

The test is entirely painless, takes 15–45 minutes depending on how many territories are examined, uses no needles, no radiation and no contrast dye, and can be repeated as often as clinically necessary, including during pregnancy. Because it is dynamic — the probe can watch blood flow change as you breathe, cough or stand — duplex often reveals functional problems that a static CT or MR scan would miss entirely.

The ABI test takes about five minutes, needs no special preparation and is often the first test performed in anyone over 50, in every diabetic, and in anyone reporting leg cramping on walking. A ratio below 0.9 suggests peripheral artery disease; below 0.5 suggests a more severe blockage that needs urgent evaluation. It is an excellent screening tool but does not show exactly where the blockage is.

CT angiography and MR angiography are reserved for patients in whom duplex has already flagged a significant abnormality and a procedure (angioplasty, stenting or bypass) is being planned. These scans give a precise, three-dimensional roadmap of the entire arterial tree from the aorta down to the foot, which is essential for deciding the safest access point and the right device sizes. CTA is faster and more widely available; MRA avoids radiation and iodinated contrast, which matters for patients with reduced kidney function.

Screening is aimed squarely at people who feel completely well, because the most dangerous vascular conditions — abdominal aortic aneurysm, carotid stenosis, silent peripheral artery disease and even early deep vein thrombosis — routinely cause no symptoms until they reach a crisis point. Anyone above 50 years of age, every long-standing diabetic, every current or former smoker, anyone with hypertension or high cholesterol, and anyone with a first-degree relative who had an aneurysm or a stroke falls into this higher-risk group.

For most such patients, a baseline full screen followed by a repeat scan every one to two years is a reasonable rhythm, though your specific interval will depend on what the baseline scan finds — a normal aorta at 55 needs re-checking far less urgently than a 3.8 cm aneurysm being watched for growth. Patients with known PAD, a prior DVT, or an AV fistula for dialysis typically need more frequent, focused surveillance of that specific territory rather than a full-body repeat.

Most vascular ultrasound studies — leg artery duplex, venous duplex, carotid Doppler and ABI — need no preparation at all. You can eat, drink and take your regular medicines as usual, and can walk straight back to work afterward. Wearing loose, easily rolled-up trousers or a skirt makes leg scans quicker and more comfortable, and avoiding leg oils or heavy moisturiser on the scan day helps probe contact.

Abdominal studies — the AAA scan, and renal or mesenteric duplex — are best performed after a light dinner the night before and roughly six hours of fasting, because intestinal gas can obscure the aorta and its branches. If a CT or MR angiogram has been recommended, you may be asked to fast for a few hours beforehand and to share recent kidney function (creatinine) results, particularly if contrast dye will be used.

A duplex report typically states whether flow is normal, and if not, grades the severity as mild, moderate or severe narrowing (or, for veins, mild to severe reflux), along with the specific vessel segment involved. Rather than handing over a page of numbers, Dr. Sharma explains what the grading means for you in plain language — for example, whether a moderate carotid narrowing simply needs yearly monitoring and medication, or whether it has already crossed the threshold where intervention meaningfully reduces stroke risk.

For an AAA, the key number is the maximum aortic diameter — under 3 cm is normal, 3–5.4 cm is watched at intervals determined by size, and above the surgical threshold intervention is usually recommended even without symptoms. For ABI, values between 0.9 and 1.3 are normal, 0.5–0.89 signals PAD needing risk-factor treatment and possibly further imaging, and below 0.5 usually needs prompt vascular referral. Every abnormal finding at this clinic comes with a clear next step, not just a number.

The real value of screening lies in what happens next. Because scanning and clinical decision-making sit with the same vascular surgeon, an aneurysm found on Monday's screen can be discussed, sized and, if appropriate, scheduled for EVAR the same week rather than waiting for a report to be couriered between departments. Similarly, a tight carotid stenosis found incidentally during a general vascular check can be triaged immediately for endarterectomy or stenting if it meets treatment criteria, or safely monitored if it does not yet.

This continuity particularly benefits patients who travelled from outside Hyderabad for the screen — imaging, counselling and, where needed, procedure planning can often be compressed into a single trip, with follow-up scans arranged locally or on a subsequent short visit.