Table 1 Number and diameter of the veins of Labbé

Direct

2.7 ± 0.7 (1.5–4.4) [48]

2.9 ± 0.5 (1.7–4.2) [50]

2.8 ± 0.4 (1.9–4.2) [41]

TSG

2.7 ± 0.7 (1.5–4.4) [46]

2.9 ± 0.5 (1.7–4.2) [45]

2.8 ± 0.5 (1.9–4.4) [39]

PRG

2.7 ± 0.4 (2.5–3.0) [2]

2.8 ± 0.5 (2.4–3.7) [5]

3.1 ± 0.0 (3.1–3.1) [2]

Indirect

3.3 ± 0.8 (2.2–4.6) [12]

2.7 ± 0.5 (2.0–3.5) [10]

2.6 ± 0.4 (2.0–3.1) [8]

TNG

3.0 ± 0.8 (2.2–3.8) [3]

2.7 ± 0.3 (2.3–3.1) [6]

2.4 ± 0.6 (2.0–2.8) [2]

UTG

3.4 ± 0.8 (2.4–4.6) [9]

2.6 ± 0.8 (2.0–3.5) [4]

2.7 ± 0.3 (2.2–3.1) [6]

Total

2.8 ± 0.7 (1.5–4.6) [60]

2.8 ± 0.5 (1.7–4.2) [60]

2.8 ± 0.4 (1.9–4.4) [49]