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Table 2 Effect of different parameters on the enhancement time after successful intradermal injections

From: Contrast-enhanced ultrasound: a new tool for imaging the superficial lymphatic vessels of the upper limb

  Enhancement time (s)
Median (interquartile range)
Parameter Number Antecubital fossa Axilla
Right Left Right Left
Sex Males 16 15 (10–31) 20 (13–25) 57 (31–120) 98 (52–133)
Females 14 19 (12–25) 12 (9–21) 81 (42–116) 49 (31–96)
p   0.455 0.029 0.583 0.070
Age (years) < 40 18 18 (11–34) 19 (11–29) 77 (33–123) 92 (49–147)
> 40 12 18 (11–25) 15 (12–24) 77 (32–109) 50 (37–95)
p   0.929 0.484 0.825 0.086
Body mass index < 25 16 19 (13–33) 17 (11–23) 80 (40–123) 69 (39–133)
> 25 14 14 (11–25) 14 (12–35) 57 (28–99) 63 (44–112)
p   0.256 0.546 0.111 0.884
   Right+ left  
Enhancement type A 15 + 19 = 34 12 (9–20) 13 (10–19) 36 (29–49) 50 (32–70)
B 14 + 11 = 25 25 (18–46) 25 (20–34) 118 (88–134) 126 (95–191)
p   0.001 0.007 0.000 0.000
  1. Enhancement type A indicates a successful intradermal injection with strong visual enhancement, whereas type B refers to a partially successful injection with moderate enhancement. Enhancement times in the table represent median enhancement times at the antecubital fossa and axilla