| A | B |
|---|
| lancet | sharp, pointed or bladed instrument |
| microcontainer | used to collect tiny amounts of blood |
| microhematocrit | measure of packed RBCs |
| capillary blood gas | CBG |
| 100 microliters | most common capicity of CBG collection tube |
| microscope slide | used for blood cell differential |
| 7 times | blood flow increase due to warming blood collection site |
| capillary blood | contains higher proportion of arterial blood |
| glucose | higher capillary reference range |
| Ca++, K+, total protein | lower capillary reference range |
| newborn screening | PKU (phenylketonuria) "circle" testing |
| coagulation studies and blood cultures | tests that cannot be collected by capillary puncture |
| order of capillary draw | EDTA, Other additives, Serum |
| adults and children over 1 year of age | minimum age for capillary puncture |
| middle or ring finger | sites for capillary puncture |
| perpendicular to whorls of fingerprint | direction of capillary puncture |
| children under 1 year of age | do not draw via capillary puncture |
| heel | recommended site for capillary puncture on infants < 1 year old |
| 2.0mm | location of calcaneous (heel bone) on some premature infants |
| first drop of blood | wipe away because of excess tissue fluid contamination |
