Gastroenterology Research, ISSN 1918-2805 print, 1918-2813 online, Open Access
Article copyright, the authors; Journal compilation copyright, Gastroenterol Res and Elmer Press Inc
Journal website http://www.gastrores.org

Original Article

Volume 11, Number 2, April 2018, pages 106-111

Suspected Blood Indicator to Identify Active Gastrointestinal Bleeding: A Prospective Validation

Figures

Figure 1.
Figure 1. Example of active bleeding with suspected blood indicator markers (red bars).
Figure 2.
Figure 2. Etiology of gastrointestinal bleeding in phase 1.
Figure 3.
Figure 3. Distribution of contiguous bars.
Figure 4.
Figure 4. ROC curve of SBI accuracy in phase 1 in detecting active gastrointestinal bleeding.

Tables

Table 1. Retrospective Comparison of Active Bleeding and Non-Bleeding Groups
 
CategoriesActive bleedingNo active bleedingP value
Age68.1 ± 14.357.0 ± 18.9< 0 .001
Male gender59 (51.3%)56 (48.7%)0.7
Total number of bars21.2 ± 34.51.2 ± 2< 0.001
False positive bars4.5 ± 5.74.3 ± 6.50.8
Contiguous bars21.1 ± 34.31.2 ± 1.9< 0.001

 

Table 2. Contingency Table Demonstrating Use of Eight Contiguous SBI Markers as Cutoff for Active Gastrointestinal Bleeding
 
BleedingNo bleeding
SBI: suspected blood indicator.
Contiguous SBIEight or more610
Less than eight54115
Total115115
Sensitivity53%
Specificity100%
Positive predictive value100%
Negative predictive value68.1%

 

Table 3. Comparison of Active Bleeding and Non-Bleeding Groups in Prospective Arm
 
VariablesActive bleedingNo active bleedingP value
Age68.6 ± 15.763.7 ± 15.70.24
Female gender12 (66.7%)43 (52.4%)0.27
Total number of bars37 ± 31.44.9 ± 6.7< 0.001
False positive bars4.5 ± 4.24.2 ± 5.90.82
Contiguous bars32.5 ± 31.70.6 ± 1.4< 0.001

 

Table 4. Causes of Active Bleeding in Prospective Study
 
Cause of bleedingN (%)
Angioectasia7 (38.9%)
Peptic ulcer disease2 (11.1%)
Diverticulosis1 (5.6%)
Gastric antral vascular ectasia1 (5.6%)
Unknown7 (38.9%)