There are 2 types of CVCs, tunnelled and non-tunnelled: Non-tunnelled catheter access is for short-expression access (up to about 2 weeks) as well as the catheter emerges straight from the pores and skin at the internet site of entry into the vein. The tunnel acts as a barrier to invading germs. https://dialysis31345.losblogos.com/33242628/new-step-by-step-map-for-dialysis-procedure-singapore