To determine energy compounds in myocardial tissue simultaneously, we determined standard Creatine(Cr), Creatine phosphate(PCr), Hypoxanthine(Hypo), Nicotinamide adenine dinucleotide (NAD), Adenosine monophosphate (AMP), Adenosine diphosphate (ADP), Adenosine triphosphate (ATP), Cyclic-adenosine monophosphate(cAMP), and other compounds related to energy metabolism by a rapid isocratic method.The result showed that standard curves of the eight compounds were linear and passed through the origo for all examined concentrations (r=0.999).A recovery (88.1～117.6%) and replication (CV%=0.97～3.78%) for the present method was found to be accord with methology request.

Background:Combined double-balloon enteroscopy(DBE)plays an important role in the diagnosis and treatment of patients with suspected small bowel bleeding(SSBB).Aims:To investigate the performance of combined DBE in patients with SSBB and their clinical features.Methods:A total of 94 patients with SSBB underwent combined DBE from June 2018 to April 2023 at the Third People's Hospital of Bengbu and the First Affiliated Hospital of Anhui Medical University were enrolled,and the clinical features were analyzed.Results:Fifty-four SSBB patients completed the combined DBE,and the combination rate was 57.4%.Ten patients(10.6%)stopped combined DBE due to discovery of bleeding lesions.Five patients(5.3%)stopped combined DBE due to intestinal stenosis.Twenty-five patients(26.5%)stopped combined DBE due to difficulty in insertion.Combined DBE rate in SSBB patients was correlated with the combination time and the number of previous DBE for endoscopists(P<0.05),but not the gender,age,bleeding manifestations,tobacco smoking and alcohol drinking,nutritional risk,abdominal operation history,perianal lesions,autoimmune diseases,preoperative anemia,preoperative albumin level,and enteroscopy approach(P>0.05).ROC curve showed that when the cut-off value of first insertion depth was 385 cm,the sensitivity and specificity for successful combined DBE in SSBB patients were 72.2%and 77.5%,respectively,and the area under ROC curve was 0.800(95%CI:0.705-0.875,P<0.001).Conclusions:The combined DBE rate in SSBB patients is correlated with the combination time and the number of previous DBE for endoscopists.80%of the SSBB patients are expected to complete the combined DBE when the first insertion depth is greater than 385 cm.

Background: The widespread use of biological agents in recent years can improve the nutritional status of partial patients with Crohn's disease (CD) and change the course of the disease. Aims: To investigate the correlation between the nutritional risk and clinical and endoscopic features in CD patients treated with biological agents. Methods: Sixty⁃eight CD patients treated with biological agents from June 2021 to June 2022 at the First Affiliated Hospital of Anhui Medical University were enrolled. Nutritional risk screening was conducted by nutritional risk screening 2002 (NRS2002), and its correlation with clinical and endoscopic features was analyzed. Results: In 68 CD patients treated with biological agents, incidence of nutritional risk was 66.2%. There was statistically significant difference in incidence of nutritional risk in patients with different disease behaviors, SES⁃CD score and postoperative Rutgeerts score (all P<0.05). The incidence of nutritional risk was not correlated with age, lesion location, perianal lesion, CDAI score, and the interval between CD diagnosis and the use of biological agents (all P>0.05). Conclusions: The incidence of nutritional risk is high in CD patients treated with biological agents, and is correlated with CD disease behavior, SES ⁃ CD score, and postoperative Rutgeerts score.