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. 2022 Jun;76(3):175–182. doi: 10.5455/medarh.2022.76.175-182

Table 3. Assessment of the participants’ background regarding blood sampling technique through pre-existing peripheral intravenous line. § P-value has been calculated using Fischer Exact test. ** Significant at p<0.05 level.

Statement Overall N (%)(n=95) ED N (%)(n=54) ICU N (%)(n=41) P-value§
How much milliliters (mL) of blood must be discarded before collecting the blood sample from pre-existing peripheral intravenous line?
2 mL 24 (25.3%) 14 (25.9%) 10 (24.4%) 0.248
3 mL 06 (06.3%) 05 (09.3%) 01 (02.4%)
4 mL 04 (04.2%) 03 (05.6%) 01 (02.4%)
5 mL 44 (46.3%) 20 (37.0%) 24 (58.5%)
>5 mL 07 (07.4%) 06 (11.1%) 01 (02.4%)
Unsure 10 (10.5%) 06 (11.1%) 04 (09.8%)
For how long intravenous infusion must be stopped before collecting the blood sample from pre-existing peripheral intravenous line?
15 seconds 09 (09.5%) 05 (09.3%) 04 (09.8%) 0.855
30 seconds 13 (13.7%) 08 (14.8%) 05 (12.2%)
1 minutes 22 (23.2%) 14 (25.9%) 08 (19.5%)
2 minutes 30 (31.6%) 16 (29.6%) 14 (34.1%)
>2 minutes 11 (11.6%) 07 (13.0%) 04 (09.8%)
Unsure 10 (10.5%) 04 (07.4%) 06 (14.6%)