Deep hypothermic circulatory arrest (DHCA) is an important assistant technique for complex cardiac surgery, which creates convenient operating conditions for surgery, and is also one of the measures to protect the brain during operation. However, the complications caused by this technique cannot be ignored, and it should be noticed that the occurrence of intestinal injury is relatively insidious, but brings great pain to patients and significantly reduces the quality of life after operation. Studies have shown that intestinal ischemia-reperfusion injury is induced by DHCA. It causes mast cells to activate and release many inflammatory mediators that destroy the intestinal mucosal epithelium barrier, and eventually lead to intestinal injury. This article reviewed the research progress of mast cells in the mechanism of DHCA-induced intestinal injury.
Objective To explore effects of macrophage migration inhibitory factor (MIF) inhibitor ISO-1 on intestinal injury in acute necrotic pancreatitis in pregnancy (ANPIP) rat. Methods Twenty-four pregnant SD rats were randomly averagely divided into three groups: a sham operation (SO) group, an ANP group, and an ANP model plus ISO-1 treatment group (ISO-1 group). A rat model of ANP was induced by the retrograde injection of 5% sodium taurocholate into the biliopancreatic duct. The rats were killed and the inferior vena cava blood and the tissues of pancreas and jejunum were harvested at 12 h after the operation. The serum amylase (AMY), lipase (LIP), diamine oxidase (DAO), interleukin (IL)-1β, and IL-6 levels were measured. The pancreatic and jejunal tissues were taken for the pathological examination scoring. The immunohistochemical method was used to detect the expression of the MIF, nuclear factor (NK)-κB, or tumor necrosis factor (TNF)-α protein. Results ① Compared with the SO group, the serum AMY, LIP, DAO, IL-1β, and IL-6 levels were increased in the ANP group (P<0.050), which in the ISO-1 group were decreased as compared with the ANP group, the DAO, IL-1β, and IL-6 levels had significant differences (P<0.050), but the AMY and LIP levels had no significant differences (P>0.050). ② The pathological points of the pancreas and jejunum tissues were increased in the ANP group as compared with the SO group, which were significantly decreased in the ISO-1 group as compared with the ANP group (P<0.050). ③ The average integrated optical density divide by area of the NF-κB,TNF-α, and MIF were significantly increased in the ANP group as compared with the SO group, which were significantly decreased in the ISO-1 group as compared with the ANPgroup (P<0.050). Conclusions MIF inhibitor ISO-1 could protect intestinal injury in ANPIP rat. It is suggested that MIF is one of mechanisms in ANPIP with intestinal injury and might be correlated with activities of TNF-α and NF-κB.
Objective To analyze the risk factors and prognosis of acute gastrointestinal injury (AGI) early after acute type A aortic dissection (ATAAD) repair, and develop the Nomogram prediction model of AGI. Methods The patients who underwent ATAAD cardiopulmonary bypass surgery in our hospital from 2016 to 2021 were collected and divided into an AGI group and a non-AGI group. The clinical data of the two groups were compared. A Nomogram prediction model was established by using R language. Results A total of 188 patients were enrolled, including 166 males and 22 females, aged 22-70 (49.70±9.96) years. Through multivariate logistic regression analysis, the aortic dissection (AD) risk score, poor perfusion of superior mesenteric artery (SMA), duration of aortic occlusion and intraoperative infusion of red blood cells were the predictors for AGI (P<0.05). There were statistical differences in the ventilator-assisted duration, ICU stay time, liver dysfunction, renal insufficiency, parenteral nutrition, nosocomial infection and death within 30 days after the operation between the two groups (P<0.05). The Nomogram prediction model was established by using the prediction factors, and the C index was 0.888. Through internal verification, the C index was 0.848. The receiver operating characteristic curve was used to evaluate the discrimination of the model, and the area under the curve was 0.888. Conclusion The AD risk score after ATAAD, poor perfusion of SMA, duration of aortic occlusion and intraoperative infusion of red blood cells are independent predictors for AGI. The Nomogram model has good prediction ability.
Objective To analyze the occurrence of acute gastrointestinal injury (AGI) after pediatric cardiac surgery with cardiopulmonary bypass (CPB) and its impact on prognosis, and to explore the risk factors and early warning indicators for AGI, in order to identify and diagnose AGI at an early stage. Methods This is a prospective observational study. The patients under 14 years with congenital heart disease receiving surgeries with CPB who were admitted to the pediatric ICU of West China Hospital, Sichuan University from December 2020 to December 2021 were included. The general information, perioperative gastrointestinal symptoms and intra-abdominal pressure, surgery-related information, postoperative organ function and prognosis of the children were collected. The patients were divided into an AGI group and a non-AGI group according to the 2012 European Society of Critical Care Medicine AGI diagnostic criteria. ResultsA total of 137 patients were enrolled, including 68 males and 69 females with a median age of 20.0 (6.0, 43.0) months. There were 60 patients in the AGI group and 77 patients in the non-AGI group, with an AGI incidence of 43.80%. The incidences of overall adverse outcomes, low cardiac output syndrome, and infectious complications were higher in the AGI group, and the vasoactive-inotropic score (VIS), mechanical ventilation time, ICU stay, and hospital stay were higher or longer in the AGI group, the differences were statistically significant (P<0.001). AGI was an independent risk factor for the overall adverse outcomes (OR=3.191, 95%CI 1.187 to 8.579, P=0.021). Univariate and multivariate logistic regression analyses indicated that weight, male, CPB time and intraoperative VIS were independent predictors for AGI after pediatric cardiac surgery. The receiver operating characteristic curve indicated that the patients with an intraoperative VIS>10.5 points and CPB time>96.5 min might have a higher possibility of postoperative AGI. ConclusionThe incidence of AGI in pediatric cardiac surgery with CPB is high, and it is an independent risk factor for overall adverse outcomes. Weight, male, CPB time , and intraoperative VIS are independent risk factors for AGI.