Objective To evaluate the activity of the pancreatic tissue phospholipase A2 (PLA2) in acute pancreatitis (AP) and the therapeutic effects of verapamil in rats. MethodsThe model of rat AP induced by a closed duodenal loop technique was established to observe the changes of PLA2 activity in AP group and treated group. The pancreatic histology was examined by light and electron microscopy. Results At 16 and 24 hours after induction of AP in rats, significant inhibition of the pancreatic tissue PLA2 activity was shown in the treated group as compared with AP group, with 32.34±3.87u, 35.26±4.52u and 44.83±5.31u, 47.77±5.86u respectively. The treated animals also showed a decrease in the severity of pancreatic hemorrhage, necrosis and damage to the cellular ultrastructures. Conclusion There exists high activity of PLA2 in rats AP. Calcium channel blocker, verapamil might take therapeutic effects on AP by inhibiting activity of PLA2.
Acute exacerbation of idiopathic pulmonary fibrosis (AE-IPF) is defined as an acute and clinically significant respiratory deterioration characterized by evidence of new, widespread alveolar abnormality. In the past, AE-IPF was considered to be idiopathic, which was hard to be prevented and its prognosis was hard to be obviously improved; the latest researches have shown that AE-IPF can be triggered by known causes, including pulmonary infection, aspiration, etc. This review summarizes the etiology or risk factors, treatment and prevention of AE-IPF according to the latest researches.
ObjectiveTo explore the correlation of serum lipocalin-2 (LCN2) with inflammation and the predictive value of LCN2 for detecting acute kidney injury (AKI) in acute pancreatitis (AP).MethodsNighty-one patients with AP, who were admitted to Bazhong Municipal Hospital of Traditional Chinese Medicine between June 2016 and June 2018, were enrolled in the present study. Clinical paramaters were analyzed between patients with AKI (n=29) and patients without AKI (n=62). The correlation of serum LCN2 with inflammation was assessed with Pearson’s correlation analysis. The area under the receiver operating characteristic curve (ROC AUC) for serum LCN2 predicting AKI in AP patients was assessed.ResultsCompared with the patients without AKI, the patients with AKI showed increased serum levels of C-reactive protein [(64.8±10.5) vs. (148.3±21.6) mg/L], procalcitonin [(3.5±2.3) vs. (4.8±3.9) μg/L], urea nitrogen [(5.5±2.1) vs. (6.6±2.8) mmol/L], creatinine [(80.3±28.1) vs. (107.3±30.8) μmol/L], interleukin-6 [(10.1±3.7) vs. (16.2±4.6) pg/mL], and LCN2 [(155.0±37.6) vs. (394.8±53.1) mg/mL], as well as decreased level of calcium [(2.6±1.3) vs. (2.0±1.0) mmol/L], the differences were all statistically significant (P<0.05). The serum level of LCN2 was correlated with C-reactive protein (r=0.694, P<0.05), interleukin-6 (r=0.762, P<0.05), and procalcitonin (r=0.555, P<0.05) in patients with AP. The ROC AUC of LCN2 for predicting AKI was 0.844 (P<0.05) , with a sensitivity of 81.3% and a specificity of 81.4% when the cut-off value was 210.2 ng/mL.ConclusionsSerum LCN2 concentration is elevated in patients with AKI. In patients with AP, serum LCN2 level is positively correlated with C-reactive protein, interleukin-6, and procalcitonin. It can be regarded as a reliable indicator for predicting AKI.
Objective To evaluate the effect of early clinical interference strategies on preventing the conversion of acute pancreatitis to the severe form and aggravation of severe acute pancreatitis (SAP). Methods The patients with acute pancreatitis admitted to this hospital were divided into two therapeutic phases by different therapeutic methods from January 2001 to December 2008. Patients in the first phase (from January 2001 to December 2004) were treated by the routine management, and the second phase (from January 2005 to December 2008) by the routine management combined with early clinical interference strategies. Then, the ratio of conversion from acute pancreatitis to SAP and prognosis of SAP between two phases were compared. Results Compared with the first phase, the rate of aggravation of acute pancreatitis was significantly decreased in the second phase (4.48% vs. 21.18%), the average healing time of SAP, the incidences of systemic and local complications and the mortality of pancreatitis were reduced (P＜0.05). When early clinical interference strategies were performed, some adverse reaction and complications occurred in 35 cases, but without severe consequence. Conclusion Early clinical interference strategies may serve as a beneficial strategy on preventing the progression of mild acute pancreatitis to the severe form or halting the aggravation of acute pancreatitis.
Objective To investigate the effects of different levels of intra-abdominal pressure ( IAP) on respiration and hemodynamics in a porcine model of acute lung injury( ALI) .Methods A total of 8 domestic swine received mechanical ventilation. Following baseline observations, oleic acid 0. 1mL/kg in 20mL of normal saline was infused via internal jugular vein. Using a nitrogen gas pneumoperitongum, the IAP increased from0 to 15 and 25mmHg, and the groups were named IAP0 , IAP15 and IAP25 , respectively. During the experimental period, hemodynamic parameters including heart rate ( HR) , cardiac output ( CO) , mean arterial pressure( MAP) , central venous pressure( CVP) , intrathoracic blood volume index( ITBVI) and so on were obtained by using thermodilution technique of pulse induced continuous cardiac output( PiCCO) . The esophageal pressure( Pes) was dynamicly monitored by the esophageal catheter. Results Pes and peak airway pressure( Ppeak) increased and static lung compliance( Cstat) decreased significantly in IAP15 and IAP25 groups compared with IAP0 group( all P lt;0. 01) . Transpulmonary pressure( Ptp) showed a downward trend( P gt;0. 05) . PO2 and oxygenation index showed a downward trend while PCO2 showed a upward trend ( P gt;0. 05) . HR and CVP increased significantly, cardiac index( CI) and ITBV index decreased significantly ( all P lt;0. 05) ,MAP didn′t change significantly( P gt;0. 05) . The changes in Pes were negatively correlated with the changes in CI( r = - 0. 648, P = 0. 01) . Conclusion In the porcine model of ALI, Pes increases because of a rise in IAP which decreased pulmonary compliance and CI.
