Question

Explain why homeostasis is not affected when the great saphenous vein is removed and used for coronary bypass surgery.

Answer 1

Answer:

The homogenous is not affected when great saphenous vein is removed and used for coronary bypass surgery because:

Explanation:

• Removal of saphenous vein will not hinder normal circulation in leg. The blood that previously Flowed through saphenous vein will change its course of travel known as collateral circulation. There will be swelling in leg but it decrease with time.

Answer 2

Answer:

The homeostasis is not affected when the great saphenous vein is removed and used for coronary bypass surgery because it prevents the leg's regular circulation

Explanation:

In patients undergoing coronary artery bypass surgery, the saphenous vein (SV) is the most often utilised conduit for revascularization (CABG). This vessel's patency rate is lower than that of the internal thoracic artery (ITA). The (human) SV (hSV) is harvested with the pedicle removed in most CABG procedures, however the ITA is removed with its outer pedicle intact. In veins rather than arteries, the vasa vasorum, a microvessel network that supplies the adventitia and media with oxygen and nutrients, is more evident and extends deeper into the lumen. The removal of the hSV pedicle causes vascular stress during standard CABG preparation, damaging the vasa vasorum and potentially compromising transmural flow and graft function

. The vasa vasorum is preserved and transmural blood flow is restored at graft implantation and CABG completion in patients where the hSV is removed with pedicle intact. In addition to oxygen and nutrients, the vasa vasorum may also transport substances that could improve transplant function by sustaining blood flow to the hSV wall. Studies have demonstrated the progression of vasa vasorum in both hSV and animal SV using either corrosion casts or India ink. Moreover, ex vivo perfusion, histological, and ultrastructural studies provide some evidence that the hSV vasa vasorum end in the vascular lumen. This article discusses how the hSV is prepared for use as a bypass conduit in CABG

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