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Table 3 Length of glass particles (n = 19,473)

From: The effect of different methods of intravenous injection on glass particle contamination from ampules

Group

Length (µm)

χ 2

p

Mean ± SD

Median

range

1 (n = 5169)

21.27 ± 18.55

18.06

1.97–504.67

0.826

0.843

2 (n = 5311)

20.87 ± 16.60

17.36

2.11–215.25

3 (n = 4971)

20.97 ± 16.68

17.36

1.92–269.29

4 (n = 4022)

22.70 ± 16.04

20.83

2.39–190.67

Total

21.38 ± 17.06

18.34

1.92–504.67

  
  1. Group 1 IV bolus injection directly after immediate aspiration, Group 2 IV bolus injection directly after 2 min’ delayed aspiration, Group 3 IV bolus injection directly after aspiration with a filter needle syringe and Group 4 Side shooting to an infusion set with an in-line filter