Brief Article
Copyright ©2012 Baishideng Publishing Group Co.
World J Gastroenterol. Sep 7, 2012; 18(33): 4585-4592
Published online Sep 7, 2012. doi: 10.3748/wjg.v18.i33.4585
Table 1 Sound characteristics of acute bowel obstruction vs subacute bowel obstruction vs no obstruction
No obstruction (n = 20)Subacute obstruction (n = 11)Acute obstruction (n = 40)P value
Sound duration (s)0.64 (0.20-1.57)0.63 (0.23-1.67)0.69 (0.19-2.10)> 0.05
Sound-to-sound interval (s)0.72 (0.46-1.27)0.70 (0.47-1.67)0.75 (0.41-1.41)> 0.05
Dominant frequency (Hz)325 (225-530)405 (218-565)315 (225-545)> 0.05
Peak frequency (Hz)595 (378-713)655 (465-735)585 (530-706)> 0.05
Data are presented as the median (inter-quartile range).
Table 2 Sound characteristics of acute small bowel obstruction vs acute large bowel obstruction
Small bowel obstruction (n = 27)Large bowel obstruction (n = 13)P value
Sound duration (s) 0.55 (0.17-1.67) 0.87 (0.27-3.60)0.021
Sound-to-sound interval (s) 0.72 (0.41-1.40) 0.78 (0.44-1.42)0.621
Dominant frequency (Hz)288 (220-479)440 (250-643)0.003
Peak frequency (Hz)560 (480-695)660 (578-740)0.060
Data are presented as the median (inter-quartile range).
Table 3 Sound characteristics of acute large bowel obstruction vs large bowel pseudo-obstruction
Large bowel obstruction (n = 13)Large bowel pseudo-obstruction (n = 3)P value
Sound duration (s) 0.87 (0.27-3.60) 1.24 (0.53-2.64)0.686
Sound-to-sound interval (s) 0.78 (0.44-1.42) 1.08 (0.68-2.23)0.061
Dominant frequency (Hz)440 (250-643)488 (389-679)0.174
Peak frequency (Hz)660 (578-740)630 (525-750)0.638
Data are presented as the median (inter-quartile range).
Table 4 Sound characteristics of acute small bowel obstruction vs large bowel pseudo-obstruction
Small bowel obstruction (n = 27)Large bowel pseudo-obstruction (n = 3)P value
Sound duration (s) 0.55 (0.17-1.67) 1.24 (0.53-2.64)0.048
Sound-to-sound interval (s) 0.72 (0.41-1.40) 1.08 (0.68-2.23)0.041
Dominant frequency (Hz)288 (220-479)488 (389-679)0.001
Peak frequency (Hz)560 (480-695)630 (525-750)0.446
Data are presented as the median (inter-quartile range).
Table 5 Sound characteristics of non-operated and operated patients with small bowel obstruction
Small bowel obstruction, non operated (n = 25)Small bowel obstruction, operated (n = 10)P value
Sound duration (s)0.55 (0.21-1.45)1.00 (0.25-2.26)  0.100
Sound-to-sound interval (s)0.63 (0.39-1.13)1.29 (0.61-1.82)< 0.001
Dominant frequency (Hz)360 (225-560)265 (210-455)0.084
Peak frequency (Hz)625 (535-713)525 (400-738)0.432
Data are presented as the median (inter-quartile range).