"needle: sharp, beveled-edge, hollow metal needle that guides and is inserted along with the catheter part of the cannula into the vein; after successfully securing the catheter in the vein, the needle is removed and safely discarded"
"a flexible tube that is inserted along with the needle into the vein and is retained in the vein after needle withdrawal to allow for medication administration and drawing blood"
"The gauge of the IV cannula affects fluid flow rate, i.e. smaller gauge numbers indicate larger diameters and higher flow rates. Injection port caps are coloured for the identification of cannula gauge size 1. An international standard, ISO 10555-5, specifies the size and colour of cannulae 4."
"needle: sharp, beveled-edge, hollow metal needle that guides and is inserted along with the catheter part of the cannula into the vein; after successfully securing the catheter in the vein, the needle is removed and safely discarded"
"14 G (orange): flow rate of 290 mL/min; major trauma and rapid fluid resuscitation"
"16 G (grey): 176 mL/min; mainly major surgeries and large-volume infusions"
"18 G (green): 76 mL/min; commonly blood transfusion and contrast studies"
"20 G (pink): 54 mL/min; general medication administration and routine hydration"
"22 G (blue): 31 mL/min; preferred for chemotherapy and use in elderly or paediatric patients with small veins"
"24 G (yellow): 14 mL/min; suited for fragile veins in neonates and elderly patients"
"The following shows their variations of size, colour and application 4,5."