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Table 2 Operation details and treated lesions of all unilateral and bilateral BPA

From: Bilateral versus unilateral balloon pulmonary angioplasty for inoperable chronic thromboembolic pulmonary hypertension

  All BPA sessions (N = 210) Unilateral BPA (N = 124) Bilateral BPA (N = 86) *p value
Operation details
 Operation duration (minutes) 240.4 ± 61.9 239.0 ± 56.7 242.5 ± 69.0 0.70
 The amount of contrast media given (ml) 250 (200, 300) 250 (200, 300) 240 (200, 295) 0.82
 Dose area product (μGy m2) 1645.0 (1043.1, 3658.5) 1708.4 (1059.0, 3686.3) 1613.8 (947.1, 3414.8) 0.70
 Largest balloon size used/session (mm) 4 (3, 5) 4 (3, 5) 4 (3, 5) 0.78
 Vessels treated/session 7 (5, 9) 6 (4, 8) 8 (5.5, 10) 0.003
 Total number of lobes treated (Lobes treated/session) 502 [2 (2, 3)] 235 [2 (1, 3)] 267 [3 (2, 4)] < 0.001
 Total number of left/right lower lobes treated (%) 281 (56.0) 120 (51.1) 161 (60.3) 0.04
 Lesion types (treated lesions/session)
 Total number of treated lesions 1831 [8 (6, 11)] 1008 [8 (5, 10)] 823 [9 (7, 12)] 0.01
 Ring-like stenosis 167 [0 (0, 2)] 101 [0 (0, 2)] 66 [0 (0, 2)] 0.82
 Web lesions 1429 [6 (4, 9)] 778 [6 (4, 8)] 651 [7 (4.5, 10)] 0.04
 Subtotal occlusion 169 [1 (0, 2)] 91 [0 (0, 1)] 78 [1 (0, 2)] 0.27
 Total occlusion 66 [0 (0, 0)] 38 [0 (0, 0)] 28 [0 (0, 0)] 0.86
Lesion location (treated lesions/session)
 Lobar arteries 10 7 3  
 Segmental arteries 391 [1 (0, 3)] 195 [1 (0, 2.8)] 196 [2 (0, 4)] 0.03
 Subsegmental arteries 1430 [6 (4, 9)] 808 [6 (4, 9)] 622 [6 (4, 10)] 0.35
  1. Continuous variables are expressed as mean ± standard deviation or median and interquartile range according to variable distribution
  2. BPA balloon pulmonary angioplasty
  3. *Comparison between bilateral BPA and unilateral BPA