Face and construct validity assessment of training models for intestinal anastomosis in low-birth-weight infants
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In brief
In brief
This study validated a novel surgical training model for intestinal anastomosis in low-birth-weight infants, addressing the technical challenge of small intestinal diameter and size discrepancy. The hydrophilic wet model demonstrated superior face validity and construct validity, with anastomotic leak pressure correlating significantly with surgeon experience.
Written by the GCMD Library team from the article.
Abstract
Purpose
It is difficult to perform intestinal anastomosis in low-birth-weight infants because the intestinal diameter is small and the discrepancy in diameter of the proximal and distal intestines is often large, but there has been no optimal-sized training model. Therefore, we developed a new intestinal anastomosis training model that imitated the size of the intestine in low-birth-weight infants, and evaluated its face and construct validity.
Methods
Two intestinal models were developed with crossMedical, Inc. using a hydrophilic acrylic material (wet model) or a polyurethane soft resin (dry model). The inner diameter of the simulated intestinal tract was 15 mm on the oral end and 6 mm on the anal end. Thirteen pediatric surgeons performed anastomosis and responded to the questionnaire.
Results
In the questionnaire, the wet model had significantly higher scores than the dry model in “appearance”, “softness” and “usefulness for training”. In the anastomotic results of the wet model, the anastomosis leak pressure was significantly correlated with the number of intestinal anastomotic experiences in low-birth-weight infants (correlation coefficient = 0.64, P = 0.035).
Conclusions
The wet-type intestinal anastomosis model showed good face validity. Its leak pressure had a significant correlation with clinical experience; thus, construct validity was demonstrated.