Graft Patency Evaluation
Graft Patency Evaluation - Related Videos
07:22
Vein Interposition Model: A Suitable Model to Study Bypass Graft Patency
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Cited by 3 •
2017
This video demonstrates a model to study the development of myointimal hyperplasia after venous interposition surgery in rats.
10:32
Athymic Rat Model for Evaluation of Engineered Anterior Cruciate Ligament Grafts
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Cited by 11 •
2015
Animal models are important tools for the evaluation of tissue-engineered grafts. This paper presents the protocol for preparing an electrospun biodegradable polymer graft for use in anterior cruciate ligament tissue engineering, as well as a surgical protocol for implantation in a rat model.
07:37
Mouse Models for Graft Arteriosclerosis
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Cited by 17 •
2013
We describe protocols for our mouse graft arteriosclerois (GA) models which involve interposition of a mouse vessel segment into a recipient of the same inbred strain. By backcrossing additional genetic changes into the vessel donor, the model can assess the effect of specific genes on GA.
04:08
Fluorescence Angiography for Evaluation of Aneurysm Perfusion and Parent Artery Patency in Rat and Rabbit Aneurysm Models
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Cited by 5 •
2019
We present a protocol to efficiently evaluate aneurysm perfusion and vessel patency of sidewall aneurysm in rats and rabbits, using fluorescein-based fluorescence video angiography (FVA). With a positive predictive value of 92.6%, it is a simple but very effective and economical method with no special equipment required.
08:50
Establishment and Evaluation of a Porcine Vein Graft Disease Model
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Cited by 4 •
2022
In this protocol, novel pig vein bypass grafting was performed through a small incision in the left chest wall without cardiopulmonary bypass. A postoperative pathology study was done, which showed intimal thickening.
FAQs
Duplex ultrasound evaluates graft function by using Doppler frequency shifts to quantify blood-flow velocity. It also displays velocity waveforms, giving clinicians information about how flow behaves through the graft. These measurements help identify abnormal flow patterns that may prompt further imaging or closer follow-up during postoperative assessment and ongoing surveillance.
Each imaging option contributes different information about a graft. Duplex ultrasound measures flow velocity and shows waveforms, whereas computed tomography angiography, magnetic resonance angiography, and catheter angiography visualize the graft lumen. This distinction matters because lumen imaging can reveal narrowing or occlusion, while Doppler data characterize flow behavior.
Patency findings are interpreted by considering whether the graft remains open, how flow is measured, and what the lumen looks like. Evidence of narrowing may indicate stenosis, while obstruction can be associated with occlusion or thrombosis. Distinguishing these outcomes from uncomplicated healing helps clinicians decide whether additional evaluation or intervention is needed.
Postoperative assessment establishes whether the graft is functioning as expected after surgery. Clinicians can use duplex ultrasound to quantify velocity and review waveforms, or use computed tomography angiography, magnetic resonance angiography, or catheter angiography to inspect the lumen. Repeating these evaluations over time supports surveillance for narrowing, thrombosis, occlusion, or other graft failure.
Follow-up testing is particularly valuable when clinicians need to determine whether a graft continues to support adequate flow or whether a new abnormality requires attention. Serial evaluation can show uncomplicated healing versus stenosis, thrombosis, or occlusion. When concerning findings appear, timely results can guide intervention and help improve the durability of revascularization procedures.
In medicine, graft patency evaluation provides a way to assess treatment success after a revascularization procedure. Its relevance extends beyond a single postoperative check: flow and lumen assessments can establish function, support monitoring over time, and help distinguish graft failure from uncomplicated recovery. This information connects imaging findings with decisions intended to preserve treatment benefit and graft durability.