[Retracted] Effect of the Kanghuier Transparent Hydrocolloid Dressing in Preventing Central Venous Catheter Infection and Phlebitis after Cardiac Surgery

Table 1

Phlebitis grading judgment standards.

Grade	Main symptoms
0	No obvious symptoms
1	Redness at the catheter site with slight pain
2	Redness at the catheterization site with obvious pain
3	Obvious redness and swelling at the catheterization site, cord-like veins can be palpated, accompanied by obvious pain
4	Pus exudates on the basis of grade 3, and the length of the cord-like vein exceeds 250 mm