Patent Blue V (calcium salt)

Patent Blue V calcium salt is a triarylmethane dye used for tissue staining and lymphatic tracing, mainly applied by topical injection or eye drops. Patent Blue V calcium salt has affinity for specific tissues (such as corneal endothelium, lymphatic system), and stains the target structure by adsorption or binding, assisting in precise operation during surgery. Patent Blue V calcium salt is mainly used in ophthalmic surgery (such as graft staining for Descemet's membrane endothelial keratoplasty) and lymphatic drainage localization for sentinel lymph node biopsy of tumors[1][2].