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Table 2 Element and Composite Block Scores and Block Characteristics

From: A prospective, randomized comparison of ultrasonographic visualization of proximal intercostal block vs paravertebral block

Image Ratings

PVB (n = 26)

PICB (n = 32)

P value

Bony elements (TP/Rib)

Expert

2.08 ± .98

2.79 ± .37

.001

Novice

2.14 ± .93

2.6 ± .52

.09

Pleura

Expert

1.9 ± 1.1

2.8 ± .42

.001

Novice

1.9 ± .97

2.62 ± .59

.002

Ligament/IIM

Expert

1.67 ± 1.07

2.07 ± .89

.18

Novice

1.33 ± .76

1.78 ± .82

.05

Needle

Expert

1.69 ± 1.12

2.21 ± 1.01

.07

Novice

1.0 ± 1.06

1.59 ± 1.18

.06

Local Anesthetic Spread

Expert

2.23 ± .86

2.65 ± .72

.03

Novice

1.73 ± .78

2.0 ± .89

.29

Composite Score

Expert

9.58 ± 4.22

12.48 ± 2.72

.008

Novice

8.08 ± 3.28

10.57 ± 3.01

.01

Block Characteristics

 LA volume (cc)

14.2 ± 4.7

12.6 ± 3.2

.126

 Imaging time (s)

43.3 ± 40.5

26.8 ± 16.8

.039

 Needling time (s)

102.5 ± 49.1

122.7 ± 76.0

.245

 Distance from midline (cm)

3.7 ± 1.3

5.3 ± 1.2

< 0.001

 Length of needle in body (cm)

4.1 ± .70

4.4 ± 1.5

.363