患者张某,女,20岁,以“黑便2d”之主诉而入院。既往体健,否认慢性病史,末次月经2015年12月18日。患者于2015年12月22日无明显诱因出现大便色黑,共2次,总量250~350 ml,伴有轻微头晕、乏力,无发热,无明显心慌、汗出等不适,于外院就诊后初步诊断为上消化道出血,予白眉蛇毒血凝酶及泮托拉唑治疗,仍有黑便,后至我院急诊。查胃镜提示:十二指肠球部溃疡(A1期),HP(-)。心电图及胸片未见明显异常。大便潜血阳性。血常规:白细胞计数(WBC):10.42×10~9/L,中性粒细胞 Patient Zhang, female, 20 years old, with “black stool 2d ” of the chief complaint and admission. Past physical health, deny chronic medical history, the last menstrual December 18, 2015. Patients on December 22, 2015 no obvious incentive to stool color black, a total of 2 times, a total of 250 ~ 350 ml, with mild dizziness, fatigue, no fever, no obvious palpitation, sweating and other discomfort after treatment in the hospital Initial diagnosis of upper gastrointestinal bleeding, white eyebrow venom hemagglutinin and pantoprazole treatment, there are still black, then to our hospital emergency room. Check gastroscopy Tip: duodenal ulcer (A1), HP (-). ECG and chest X-ray showed no obvious abnormalities. Fecal occult blood positive. Blood: white blood cell count (WBC): 10.42 × 10 ~ 9 / L, neutrophils