Table 3 Aerosol deposition in thirty-one postoperative neurological patients

Pulmonary deposition (%)

19.7 (14.0–24.5)^*,†,‡

6.2 (5.4–7.3)^§

6.9 (6.6–7.4)^§

9.2 (8.0–13.0)^§

Right lung

10.6 (8.2–14.2)^*,†,‡

3.1 (2.7–3.7)^§

3.5 (3.0–3.9)^§

4.7 (4.2–7.1)^§

Inner region

5.2 (3.6–7.8)^*,†,‡

1.2 (1.0–1.5)^§

1.3 (1.2–1.5)^§

2.2 (1.7–4.4)^§

Outer region

5.0 (2.8–6.5)^*,†

1.8 (1.7–2.3)^§

2.2 (1.9–2.5)^§

2.6 (2.3–3.0)

Penetration index

0.44 ± 0.12 (27)^*,†

0.66 ± 0.10 (15)^§

0.67 ± 0.07 (10)^‡,§

0.47 ± 0.19 (40)^†

Left lung

9.1 (6.6–10.3)^*,†,‡

3.1 (2.6–3.7)^§

3.5 (3.1–4.1)^§

3.8 (3.3–4.9)^§

Inner region

3.9 (2.7–4.3)^*,†,‡

1.1 (0.9–1.3)^§

1.3 (1.2–1.4)^§

1.4 (1.2–2.0)^§

Outer region

5.2 (3.6–6.3)^*,†,‡

2.0 (1.7–2.3)^§

2.1 (1.9–2.7)^§

2.3 (2.0–2.9)^§

Penetration index

0.56 ± 0.17 (30)

0.73 ± 0.10 (14)

0.69 ± 0.11 (16)

0.57 ± 0.13 (23)

Right/left lung ratio

1.31 ± 0.23 (17)

1.04 ± 0.17 (16)

1.01 ± 0.19 (19)

1.66 ± 1.23 (74)

Extrapulm. deposition (%)

80.3 (75.5–86.0)^*,†,‡

93.8 (92.7–94.6)^§

93.1 (92.5–93.4)^§

90.8 (87.0–92.1)^§

ETT and Tracheal area

23.9 (20.3–26.4)^*,†

11.9 (11.1–12.1)^‡,§

7.4 (6.7–8.6)^‡,§

19.2 (16.7–24.0)^*,†

Ventilator circuit

50.5 (48.1–56.3)^*,†,‡

78.2 (76.8–79.0)^‡,§

81.5 (79.7–81.7)^‡,§

65.5 (58.3–71.2)^*,†,§

Inspiratory circuit

38.6 ± 5.5 (14)^*,†,‡

68.9 ± 2.9 (4)^‡,§

73.7 ± 2.9 (4)^‡,§

13.5 ± 5.7 (42)^*,†,§

Inspiratory limb

27.0 ± 9.1 (34)^†

31.2 ± 2.5 (8)

34.7 ± 3.0 (9)^§

–

Humidification chamber

–

31.3 ± 3.4 (11)

32.1 ± 5.6 (17)

–

Nebulizer T-piece

11.6 ± 5.0 (43)

6.4 ± 1.4 (21)^‡

6.9 ± 1.9 (27)^‡

13.5 ± 5.7 (42)^*,†

Expiratory circuit

13.1 (11.0–15.5)^†,‡

9.1 (7.0–11.2)^‡

6.3 (6.0–8.4)^‡,§

52.1 (46.5–57.0)^*,†,§

Nebulizer retention

4.6 ± 0.11 (2)

4.2 ± 0.09 (2)

4.5 ± 1.3 (28)

4.3 ± 0.13 (3)