Fig. 4

Evaluation of local application reactions. a. CT scan results of the Bama miniature pig. b. Transmission electron microscopic images of muscle tissue (scale bar = 1 μm). c. HE staining of the femoral artery stump and muscle (scale bar = 100 μm). d. The dense porous structure of the PVA sponge in the compressed state (left); the specific surface area of the PVA sponge increased significantly after water absorption (right; scale bar = 500 μm). e. A large number of red blood cells adhered to the PVA sponge after absorption of blood (left: scale bar = 100 μm, right: scale bar = 20 μm)