Table 2.

VIA scale of assessment of the condition of the patient's venous capital using objective scales [43]

VIA grade	Possible puncture points	Catheter gauge (at least)	Risk of extravasation	Ease of venipuncture	Infusion status
Grade 1	6	18G	Remote	Very easy	Flows fast and without resistance
Grade 2	4	20G	Low	Easy	Offers resistance
Grade 3	3	22G	Possible	Not easy	Tendency to resistance in prolonged infusion
Grade 4	1	24G	High	Difficult	High risk of phlebitis
Grade 5	0	No possibilities	Very high	Very difficult	Very high risk of phlebitis

^*The Venous International Assessment (VIA) scale establishes 5 grades of venous condition assessment based on possible puncture points, catheter gauge, risk of extravasation, ease of performing the technique and intravenous medication status