Related Experiment Video
Updated: Aug 8, 2026
13:16
Intravascular Perfusion of Carbon Black Ink Allows Reliable Visualization of Cerebral Vessels
Published on: January 4, 2013
Summary
A rare "cortical rim sign" on kidney imaging indicates a thin, dense rim in unilateral renal artery occlusion. This sign suggests collateral blood supply preserving some kidney tissue despite severe atrophy.
Area of Science:
- Nephrology
- Radiology
- Vascular Medicine
Background:
- Unilateral renal artery occlusion can lead to significant kidney damage.
- Accurate diagnosis and understanding of compensatory mechanisms are crucial for patient management.
Observation:
- A case study documented a unique finding during infusion pyelography in a patient with unilateral renal artery occlusion.
- The imaging revealed a distinct, thin, dense rim surrounding the affected kidney.
Findings:
- This observed
- cortical rim sign
- is hypothesized to result from collateral circulation.
- Specifically, blood supply originating from the renal capsule appears to maintain a thin layer of viable cortical tissue.
Implications:
- The
- cortical rim sign
- may serve as a diagnostic indicator of preserved renal function in cases of severe renal artery stenosis or occlusion.
- This finding highlights the kidney's capacity for collateral blood flow compensation.
Related Concept Videos
01:19Imaging Studies VII: Vascular Imaging
DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
01:22Acute Kidney Injury I: Introduction
Introduction:Acute Kidney Injury (AKI) describes a swift decrease in kidney function occurring over hours to days, characterized by the kidneys' failure to remove waste products from the bloodstream. This leads to dangerous complications like metabolic acidosis, fluid overload, and electrolyte imbalances, such as hyperkalemia, which can cause life-threatening arrhythmias. AKI is common in both hospital and outpatient settings, often triggered by dehydration, sepsis, or exposure to nephrotoxic...