The mean volumes ± SD measured with the syringe and cup were 4.5 ± 0.7 mL and 6.3 ± 0.7 mL, respectively (p < 0.001). After using both devices, the majority of subjects believed that the ...

Equipment needed includes a 1- to 3-ml syringe or 0.5-ml insulin syringe; 25- or 27-gauge needles; microtainer collection tubes with heparin and calcium-EDTA; microhematocrit capillary tubes and ...