Venous Bypass
Venous Bypass - Related Videos
08:08
Cardiopulmonary Bypass in a Mouse Model: A Novel Approach
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Cited by 9 •
2017
This paper describes how to perform cardiopulmonary bypass in mice. This novel model will facilitate the investigation of the molecular mechanisms involved in organ damage.
12:49
Porcine Liver Transplantation Without Veno-Venous Bypass As an Extended Criteria Donor Model
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Cited by 2 •
2022
In this protocol, a model of porcine orthotopic liver transplantation after static cold storage of donor organs for 20 h without the use of a veno-venous bypass during engraftment is described. The approach uses a simplified surgical technique with minimization of the anhepatic phase and sophisticated volume and vasopressor management.
07:37
Roux-en-Y Gastric Bypass Operation in Rats
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Cited by 45 •
2012
Numerous studies using gastric bypass rat models have been recently conducted to uncover the underlying physiological mechanisms of Roux-en-Y gastric bypass operations. This article aims to demonstrate and discuss the technical and experimental details of our published gastric bypass rat model to understand advantages and limitations of this experimental tool.
08:14
Central Venous Catheter Insertion: Subclavian Vein
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2023
Source: James W Bonz, MD, Emergency Medicine, Yale School of Medicine, New Haven, Connecticut, USA Central venous access is necessary in a multitude of clinical situations for hemodynamic monitoring, medication delivery, and blood sampling. There are three veins in the body that are accessed for central venous cannulation: the internal jugular, the subclavian, and the femoral vein. Central venous access via the subclavian vein has several advantages over other possible locations. The subclavian...
08:27
Adult Mouse Venous Hypertension Model: Common Carotid Artery to External Jugular Vein Anastomosis.
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Cited by 13 •
2015
We describe a method for creating a reliable model of cerebral venous hypertension in the adult mouse. This model has been widely described and tested in the rat. This new counterpart in the mice opens the possibility of using genetic modified animals and thereby broadens the applications of the model.
FAQs
Connecting the graft upstream and downstream from the blockage creates an entry and exit route for blood. Healthy vessel segments provide suitable attachment sites and allow the new channel to function across the obstructed region. This arrangement supports a pressure gradient, which drives blood through the graft and helps reestablish venous drainage.
Blood moves through the graft when a suitable pressure gradient exists between its upstream and downstream connections. If that gradient does not adequately support flow, venous drainage may remain impaired even after the obstruction is bypassed. Understanding this relationship helps surgeons evaluate whether the planned pathway can effectively relieve congestion and support tissue or organ function.
The graft may consist of a segment of the patient’s own vein or a synthetic conduit. Selection therefore depends on the available vascular material and the need to create a usable channel between healthy vessels. Because graft choice can influence how the bypass functions over time, it is considered alongside imaging findings and long-term assessment of patency.
Venous bypass may be considered when severe venous outflow obstruction continues to compromise drainage despite less invasive options. Restoring flow can reduce swelling and tissue congestion, while also helping preserve limb or organ function. The procedure is therefore relevant when the consequences of persistent obstruction are substantial and alternative treatments do not provide sufficient improvement.
Careful imaging helps identify the obstruction, assess the vessels upstream and downstream, and support graft planning. These findings guide selection of suitable connection points and help determine whether a bypass can provide an effective route for venous drainage. Imaging also establishes an important reference for evaluating the result and monitoring the reconstructed pathway afterward.
Long-term monitoring focuses on graft patency, meaning whether the new channel remains open and functional. Follow-up assessment can help determine whether venous drainage has been maintained and whether complications have developed. Clinicians also consider changes in swelling, tissue congestion, and limb or organ function when judging whether the procedure achieved its intended clinical benefit.