Table 4 Experimentally determined technical and safety parameters for comparing different equipment set-ups during thoracoscopy of calves chronically affected with BRD

1 (n = 8)

3 (2–4)

1 (1–1)^a

3 (3–4)^a

3 (1–3)

2 (1–3)^a

2 (n = 5)

1 (1–1)

1 (1–1)^b

2 (2–4)

3 (2–4)

1 (1–3)

3a (n = 9)

1 (1–1)

3 (3–3)

2 (2–2)^b

2 (1–4)

1 (1–1)^b

3b (n = 4)

1 (1–1)

2 (2–3)^c

2 (2–2)

2.5 (1–4)

1 (1–1)