diff --git a/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs b/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
index a6b2bf044..5cc39ef3c 100644
--- a/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
+++ b/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
@@ -1663,7 +1663,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
             var baseLineSpleenLength =  await GetBaseLineSpleenLength(inDto);
 
             var presentSpleenLength = inDto.QuestionInfo.Where(x => x.QuestionType == QuestionType.SpleenLength).Select(x => x.Answer).FirstOrDefault().IsNullOrEmptyReturn0();
-            if (baseLineSpleenLength - 130 > 0)
+            if (baseLineSpleenLength - 130 > 0&& presentSpleenLength>130)
             {
                 return ReserveDecimal((presentSpleenLength - 130 - (baseLineSpleenLength - 130))*100 / (baseLineSpleenLength - 130), inDto.DigitPlaces);
             }