Table 2. Airway caliber measurements before and after implantation in three pediatric patients.

All measurements were made on expiratory scans using the centerline function of each isolated treated or contralateral normal mainstem bronchus in Mimics. (A and B) The centerline function measures DH (A) and A2 (B) every 0.1 to 1.0 mm along the entire segment of the isolated model (in this case, the mainstem bronchus). Data are means ± SD. The n listed under each mean is the number of measurements performed on each bronchus by the centerline function.

Time after operationPatient 1Patient 2Patient 3
Treated
side
Normal
side
Treated
left side
Treated
right side
Treated
side
Normal
side
(A) Airway DH (mm)
Preoperative1.7 ± 1.3
n = 28
3.2 ± 0.4
n = 7
2.2 ± 1.0
n = 20
4.0 ± 0.6
n = 11
1.7 ± 1.3
n = 19
4.0 ± 1.2
n = 18
1 month2.5 ± 0.4*
n = 28
2.9 ± 0.4
n = 7
4.8 ± 0.5*
n = 20
5.4 ± 0.6*
n = 11
3.6 ± 1.2*
n = 19
3.7 ± 1.1
n = 18
3 months4.6 ± 0.3
n = 17
4.4 ± 0.4
n = 9
4.0 ± 0.1
n = 7
4.5 ± 0.4
n = 15
6 months3.8 ± 0.4
n = 22
3.6 ± 0.5
n = 7
12 months3.5 ± 0.5
n = 20
3.9 ± 0.5
n = 10
30 months4.0 ± 0.9#
n = 20
4.5 ± 1.2
n = 10
(B) Airway A2 (mm)
Preoperative4.7 ± 4.2
n = 28
9.8 ± 2.2
n = 7
9.9 ± 8.3
n = 20
20.3 ± 2.6
n = 11
4.2 ± 4.1
n = 19
15.7 ± 6.4
n = 9
1 month6.9 ± 0.8*
n = 28
8.0 ± 2.1
n = 7
21.8 ± 3.1*
n = 20
30.8 ± 6.0*
n = 11
13.9 ± 7.0*
n = 19
14.1 ± 6.4
n = 18
3 months17.5 ± 2.1
n = 17
16.5 ± 3.4
n = 9
14.9 ± 1.0
n = 7
22.0 ± 5.3
n = 15
6 months12.1 ± 2.9
n = 22
11.4 ± 3.2
n = 7
12 months10.9 ± 2.4
n = 20
11.6 ± 3.9
n = 10
30 months
Postoperative
15.0 ± 6.8#
n = 20
23.1 ± 11.0
n = 10

*P < 0.01 versus preoperative.

#P < 0.01 versus 1 month, Student’s t test (paired, two-sided, α = 0.05).