For example, if a patient highly suspected of having midgut volvulus has an HR of 120 beats/min, a score of 21 points is assigned; for a MAP of 70 mmHg, a score of 16 points is assigned; for a CRP level of 75 mg/L, a score of 26 points is assigned; for an Na concentration of 135 mmol/L, a score of 24 points is assigned; for an ALB concentration of 40 g/L, a score of 20 points is assigned; for a pH value of 7.42, a score of 35 points is assigned. Here, CRP is linked to volvulus of midgut.