What is the normal small bowel length in humans? first donor-based cohort analysis

Normal small bowel length (SBL) has been reported within a wide range, but never studied in a cohort of either pediatric or adult deceased donors. Between 5/2006 and 2/2011, SBL was measured in all grafts procured for intestinal transplantation at a single center and used for either isolated intestinal transplant (15) or multiorgan transplants (5) employing a standardized method. SBL was the only not significantly different variable among pediatric and adult donors divided by age 16. Furthermore, donors were classified in 3 groups: group 1: Height < 70 cm, group 2: 71-150 cm and group 3: ≥ 151 cm. Mean age was: 0.58, 5.6, 22.01 years, respectively. Mean height and weight were 65.8, 123.2, 166.1 cm (p = 0.001) and 6.9, 23.8, 65.2 kg (p = 0.001), for each group. The SBL by group was: 283.0, 324.7, 356.0 cm, remaining as the only nonsignificant variable (p = 0.06), in contrast to BMI, BSA (p = 0.001). The SBL/height ratio: 4.24, 2.7, 2.12 (p = 0.001; rho: -0.623) or SBL/BSA ratio was 8.36, 3.7, and 2.03, respectively (p : 0.0001; rho: -0.9). SBL does not increase with growth like other anthropometric variables. The SBL/height ratio significantly decreases with growth; however, bowel diameter increases, which needs further evaluation.