Background/Purpose: This study was undertaken to assess the usefulness of p
ulsed Doppler sonography (PDS) for the detection of strangulation in small
bowel obstruction by evaluating the hemodynamics in the superior mesenteric
Methods: The authors performed PDS in 117 normal children: 22 children aged
0 to 1 months (group I), 27 children aged 1 to 12 months (group II), 36 ch
ildren aged 1 to 6 years (group III), and 32 children aged 7 to 15 years (g
roup IV). Patients included 25 with simple obstruction: 1 in group II, 10 i
n group III, and 14 in group IV; and 9 with strangulating obstruction: 2 in
group I, 2 in group II, 3 in group III, and 2 in group IV. The authors mea
sured the peak-systolic velocity, end-diastolic velocity (EDV), and mean av
erage velocity and calculated the resistive index (RI).
Results: The authors observed both a significant decrease in the EDV and in
crease in the RI for the SMA in strangulating obstruction compared with sim
Conclusion: Analysis of the hemodynamics in the SMA using PDS is useful to
differentiate strangulating obstruction from simple obstruction. J Pediatr
Surg 36:430-435. Copyright (C) 2001 by W.B. Saunders Company.