BACKGROUND Patients with postoperative severe acute pancreatitis(SAP)in the intensive care unit(ICU)face complex challenges arising from physiological and microenvironmental imbalances,psychological stress,and the int...BACKGROUND Patients with postoperative severe acute pancreatitis(SAP)in the intensive care unit(ICU)face complex challenges arising from physiological and microenvironmental imbalances,psychological stress,and the interaction of multiple environmental factors.Traditional nursing models inadequately address this integrated microenvironment,highlighting the need for microenvironment theory-based nursing interventions to optimize outcomes.AIM To evaluate the impact of a microenvironment theory-based nursing intervention model on the prognosis of patients with postoperative SAP in the ICU.METHODS Between January 2022 and December 2024,106 patients with SAP who were admitted to ICU of the Fourth Affiliated Hospital of Soochow University(Suzhou Dushu Lake Hospital)were randomly assigned to two groups:(1)A control group(n=53,routine care);and(2)An observation group(n=53,routine care plus microenvironment theory-based nursing).Postoperative recovery,psychological distress,disease severity,and complication rates were compared between groups.RESULTS The observation group had significantly shorter postoperative flatus,defecation,and hospital stay compared with the control group(P<0.05).The Hamilton Depression Rating Scale(17-item)and Hamilton Anxiety Rating Scale(14-item)scores in the observation group were significantly lower than those in the control group(P<0.05).The observation group had a lower Acute Physiology and Chronic Health Evaluation II score(P<0.05)compared with the control group.The postoperative complication rates were 5.66%(3/53)and 18.87%(10/53)in the observation group and control group,respectively(P<0.05).CONCLUSION In patients with SAP,the microenvironment theory-based nursing intervention model facilitated postoperative recovery,alleviated depression and anxiety,reduced disease severity,and decreased postoperative complications.展开更多
Simultaneous nitrification and denitrification(SND),which is more economical compared with the tradi-tional method for nitrogen removal,is studied in this paper.In order to find the suitable conditions of this process...Simultaneous nitrification and denitrification(SND),which is more economical compared with the tradi-tional method for nitrogen removal,is studied in this paper.In order to find the suitable conditions of this process,a mixed flow activated sludge system under low oxygen concentration is investigated,and some key control parameters are exam-ined for nitrogen removal from synthetic wastewater.The results show that SND is accessible when oxygen concentra-tion is 0.3-0.8 mg/L.The nitrogen removal rate can be obtained up to 66.7%with solids retention time(SRT)of 45 d,C/N value of 10,and F/M ratio of 0.1 g COD/(g MLSS·d).Theoretical analysis indicates that SND is a physical phenomenon and governed by oxygen diffusion in flocs.展开更多
文摘BACKGROUND Patients with postoperative severe acute pancreatitis(SAP)in the intensive care unit(ICU)face complex challenges arising from physiological and microenvironmental imbalances,psychological stress,and the interaction of multiple environmental factors.Traditional nursing models inadequately address this integrated microenvironment,highlighting the need for microenvironment theory-based nursing interventions to optimize outcomes.AIM To evaluate the impact of a microenvironment theory-based nursing intervention model on the prognosis of patients with postoperative SAP in the ICU.METHODS Between January 2022 and December 2024,106 patients with SAP who were admitted to ICU of the Fourth Affiliated Hospital of Soochow University(Suzhou Dushu Lake Hospital)were randomly assigned to two groups:(1)A control group(n=53,routine care);and(2)An observation group(n=53,routine care plus microenvironment theory-based nursing).Postoperative recovery,psychological distress,disease severity,and complication rates were compared between groups.RESULTS The observation group had significantly shorter postoperative flatus,defecation,and hospital stay compared with the control group(P<0.05).The Hamilton Depression Rating Scale(17-item)and Hamilton Anxiety Rating Scale(14-item)scores in the observation group were significantly lower than those in the control group(P<0.05).The observation group had a lower Acute Physiology and Chronic Health Evaluation II score(P<0.05)compared with the control group.The postoperative complication rates were 5.66%(3/53)and 18.87%(10/53)in the observation group and control group,respectively(P<0.05).CONCLUSION In patients with SAP,the microenvironment theory-based nursing intervention model facilitated postoperative recovery,alleviated depression and anxiety,reduced disease severity,and decreased postoperative complications.
文摘Simultaneous nitrification and denitrification(SND),which is more economical compared with the tradi-tional method for nitrogen removal,is studied in this paper.In order to find the suitable conditions of this process,a mixed flow activated sludge system under low oxygen concentration is investigated,and some key control parameters are exam-ined for nitrogen removal from synthetic wastewater.The results show that SND is accessible when oxygen concentra-tion is 0.3-0.8 mg/L.The nitrogen removal rate can be obtained up to 66.7%with solids retention time(SRT)of 45 d,C/N value of 10,and F/M ratio of 0.1 g COD/(g MLSS·d).Theoretical analysis indicates that SND is a physical phenomenon and governed by oxygen diffusion in flocs.
