CT SCAN ANGIOGRAPHY RENAL (DELDC) at Dr. Essa Lab

CT SCAN ANGIOGRAPHY RENAL (DELDC) at Dr. Essa Lab

The CT SCAN ANGIOGRAPHY RENAL (DELDC) at Dr. Essa Lab is a highly specialized, non-invasive diagnostic imaging examination designed to evaluate the blood vessels supplying the kidneys. This advanced computed tomography (CT) scan utilizes state-of-the-art multi-slice technology combined with an intravenous iodinated contrast agent to produce high-resolution, three-dimensional images of the renal vasculature. At Dr. Essa Lab, which is one of Pakistan’s premier diagnostic networks based primarily in Karachi, this procedure is conducted under the strict supervision of experienced radiologists and certified technologists to ensure maximum diagnostic accuracy and patient safety. The examination is critical for assessing the renal arteries, accessory renal vessels, renal veins, and the surrounding abdominal aorta. By providing detailed anatomical and pathological insights, this scan plays a pivotal role in diagnosing renovascular diseases, planning surgical interventions, and evaluating potential kidney donors. The term DELDC represents a specific clinical protocol and facility routing code utilized by Dr. Essa Lab to ensure that high-definition, thin-slice reconstructions are prioritized for vascular mapping. Through this advanced imaging modality, clinicians can visualize the entire course of the renal arteries from their origin at the abdominal aorta to their division within the renal hilum, allowing for the detection of even microscopic vascular abnormalities.

Clinical Procedure: What to Expect

Patient Preparation

• Fasting Requirements: Patients must fast for at least 4 to 6 hours prior to the procedure to minimize the risk of contrast-induced nausea and potential aspiration. Hydration with plain water is permitted and highly encouraged.
• Renal Function Testing: A recent Serum Creatinine and estimated Glomerular Filtration Rate (eGFR) report, typically completed within the last 30 days, is mandatory. This ensures that the patient’s kidneys can safely filter and excrete the iodinated contrast medium.
• Medication Management: Patients taking metformin for diabetes must consult their physician. Metformin is generally suspended on the day of the test and held for 48 hours post-procedure to prevent the risk of lactic acidosis, subject to normal post-test renal function.
• Allergy History: It is critical to inform the clinical staff of any history of allergies, asthma, or previous adverse reactions to contrast dye. Pre-medication with antihistamines or corticosteroids may be prescribed if a mild allergy is documented.
• Comfortable Attire: Patients should wear loose, comfortable clothing. All metallic objects, including jewelry, belts, and clothing with metal zippers, must be removed before entering the scanner room as they cause severe image artifacts.

During the Procedure

The patient is positioned supine on the motorized CT scanner table. An intravenous (IV) cannula is inserted, usually in the antecubital vein, to facilitate the rapid injection of the iodinated contrast dye using an automated power injector. As the scan begins, the table slowly glides through the circular gantry of the CT machine. When the contrast is injected, patients commonly experience a transient warm sensation spreading throughout the body and a metallic taste in the mouth. The technologist will instruct the patient to hold their breath for a few seconds to eliminate motion artifacts. The entire scanning process takes less than 15 minutes, though the preparation and post-procedure monitoring may extend the visit.

When is a CT SCAN ANGIOGRAPHY RENAL (DELDC) Performed?

Evaluation of Renal Artery Stenosis

Renal artery stenosis is the narrowing of one or both of the blood vessels that carry blood to the kidneys. This condition is a primary cause of renovascular hypertension, a severe and progressive form of high blood pressure that does not respond well to standard antihypertensive medications. Physicians request this scan to visualize the extent of arterial narrowing, identify the presence of atherosclerotic plaques, and determine if the patient is a candidate for renal angioplasty or stenting.

Pre-Operative Renal Donor Evaluation

For individuals undergoing evaluation as living kidney donors, mapping the renal vascular anatomy is a critical pre-operative requirement. The surgeon must understand the precise number of renal arteries and veins, the presence of any accessory or aberrant vessels, and the branching patterns of the vasculature. This high-resolution scan provides a detailed anatomical blueprint, allowing surgical teams to select the most suitable kidney for donation and plan the surgical approach to minimize complications for both the donor and the recipient.

Suspected Renal Artery Aneurysm or Dissection

Vascular emergencies such as a renal artery aneurysm (an abnormal bulging of the arterial wall) or a dissection (a tear within the inner layer of the aorta or renal artery) can lead to life-threatening complications, including severe internal bleeding or acute kidney failure. Patients presenting with sudden, severe flank pain, hematuria, or unexplained cardiovascular collapse are scanned urgently. The CT angiography provides rapid, high-definition visualization of the vessel wall, allowing for immediate intervention.

Unexplained Renal Dysfunction or Atrophy

When clinical laboratory tests indicate a progressive decline in kidney function or when an ultrasound reveals asymmetrical kidney sizes (renal atrophy), a vascular cause must be investigated. Chronic ischemic nephropathy, caused by a compromised blood supply to the kidneys, can lead to irreversible parenchymal damage. This scan helps determine whether the renal dysfunction is secondary to large-vessel occlusive disease, allowing nephrologists to initiate appropriate revascularization therapies.

Post-Surgical or Post-Angioplasty Follow-Up

Patients who have previously undergone renal artery interventions, such as balloon angioplasty, vascular stenting, or surgical bypass grafting, require regular monitoring to ensure long-term success. The CT scan evaluates the patency of the stents, detects any signs of in-stent restenosis, and assesses the integrity of surgical anastomoses. This ensures that adequate blood flow to the kidneys is maintained and helps prevent recurrent renovascular hypertension.

What Does a CT SCAN ANGIOGRAPHY RENAL (DELDC) Detect?

• Renal Artery Stenosis: Significant narrowing of the main renal artery lumen, often caused by atherosclerosis.
• Fibromuscular Dysplasia: A non-inflammatory, non-atherosclerotic vascular disease causing a characteristic