This PowerPoint is composed of four parts. The first part is what is vascular access. This template first explains the concept of vascular access. The second part is about three types of vascular access. This part first introduces the central venous catheter, then the autogenous arteriovenous impotence, and finally briefly describes the graft vascular impotence. The third part is the maintenance methods of vascular access, which mainly includes the maintenance methods of central vein double lumen catheter, arteriovenous atrophy and vascular access. The fourth part is the importance of access self inspection to maintenance.