Lift the vein and put two threads of suture under it (see figure 3-8).
Figure 3-8. Thread under vein.
(8) Tie both threads and pull in opposite directions. Leave enough vein
between the two ties to insert the catheter.
(9) Nick the vein with a scalpel (or cut with vascular scissors).
(See figure 3-9.)
Figure 3-9. Nick vein with scalpel.