Temporal Change of Alcian Blue-Stained Primo Vascular System in Lymph Vessels of Rats.

This study aims to investigate the temporal change of a vascular system now known as the primo vascular system (PVS). We used Alcian blue (AB) dye for imaging the distribution of the PVS in lymphatic vessels. The target lymph vessels were chosen as they are easily accessible from the skin, and long-term observation is possible with intact physiological conditions due to a minimal surgical procedure. AB solution was injected into the inguinal lymph node and the target lymph vessels were located along the superficial epigastric vessels. The imaging system allowed processing for extraction of images showing changes in the AB intensity of the visualized PVS components. This newly developed procedure can be used for further study on various dynamic processes of PVS in lymph vessels.