The preoperative mean LVI was 0.36 ±0.11 (predicted, 0.18 ±0.03; p=0.0001) and when corrected for age (5LVI), 7.33 ±4.66 (predicted, 0±1; p<0.0001), which reflected a significantly shorter anteroposterior distance between the vertebral body and sternum. At long-term follow-up, the 5LVI was significantly decreased (—3.30 ± 4.92; p<0.0001): the lower anteroposterior diameter was significantly increased, but was still significantly different from the predicted value (p<0.0001).
Pulmonary function measurements are shown in Tables 2 and 3. The TLC and IVC were reduced in comparison with the normal values for a particular age (p-0.0001). During follow-up, the TLC increased due to normal growth, but as a percentage of predicted, it decreased further from 83.7 ± 12.3 percent to 73.8 ± 12.1 percent (p=0.0001). The IVC increased but as a percentage of predicted also decreased from 78.3 ± 13.5 percent to 70.7 ± 13.6 percent (p=0.0001) Here buy allegra online. The R V as a percentage of predicted preoperatively was not significantly different from the normal values, but decreased during follow-up (p=0.0001). The RV as a ratio of the TLC, however, was significantly higher than predicted (p=0.0001) and decreased during follow-up (p=0.0023). The FRC was reduced compared with the normal values (p=0.0014) and decreased at follow-up from 95.6 ± 24.6 percent to 79.4 ± 16.8 percent (p=0.0001). The lung function parameters that indicate restriction actually deteriorated during follow-up. The preoperative FEVi was reduced compared with the normal values for a particular age (p=0.0001). This was a consequence of the low IVC. When the FEVi was calculated as a fraction of the IVC, the ratio FEVi/IVC was found to be normal. Consequently, there was no significant airway obstruction in this group. At follow-up, the FEVi increased in absolute terms, but decreased when expressed as a percentage of predicted (p=0.0001). The FEVi as a ratio of the vital capacity did not changg significantly during follow-up.
We did not find a statistically significant relation between age and most of the preoperative lung function test results (percent predicted) (Fig 2). The correlation coefficient for the preoperative pulmonary function tests as a percentage of predicted with age was below 0.02, with p values that varied from 0.482 to 0.970.
Table 2—Preoperative Pulmonary Function Tests
|Measurement||No. of Patients||PreoperativeValue||p Value Difference With Predicted Value t|
|TLC, L, % predicted||115||4.848 ±1.713||0.0001|
|IVC, L, % predicted||105||3.383 ±1.316||0.0001|
|RV, L, % predicted||113||1.332 ±0.541||0.4270|
|RV/TLC ratio, % predicted||110||28.1 ±6.3||0.0001|
|FRC, L, % predicted||113||2.303 ±0.887||0.0014|
|FEVi, L, % predicted||147||2.764± 1.110||0.0001|
|FEVi/IVC ratio, % predicted||147||82.5 ±8.2||0.0038|
Table 3—Changes in Pulmonary Function Tests Measured at Follow-up
|No. of Patients||Follow-up, % Predicted||ML||%6t % Predicted||p Valuef|
|TLC||113||73.8 ±12.1||+0.21 ±0.87||—11 ± 10||0.0001|
|IVC||103||70.7 ±13.6||+0.037 ±0.83||-8 ±10||0.0001|
|RV||111||83.5 ±20.1||+0.01 ±0.38||-23 ±27||0.0001|
|RV/TLC||111||27.4 ±5.8||+6 ±21||0.0023|
|FRC||111||79.4 ±16.8||+0.19 ±0.53||—17 ± 19||0.0001|
|FEVi||145||73.3 ±15.6||+0.39 ±0.77||-6 ±15||0.0001|
Figure 2. Preoperative pulmonary function as a percentage of predicted related to the age at operation. Age group 1,0 to 9 years; group 2,9 to 13 years; group 3,13 to 15 years; group 4,15 to 17 years; group 5, 17 to 20 years; and group 6, >20 years. Only the difference in the ratio measured RV/predicted RV between age groups 1 and 2, 1 and 3, and 4 and 5 reached significance (p values 0.0077, 0.0058, and 0.0419, respectively).