Objective To investigate the relevant factors of early stage hyponatremia in patients with complete cervical spinal cord injury (CSCI). Methods A retrospective study was conducted in consecutive 49 individuals with complete CSCI from January 2010 to December 2015.The diagnostic criteria for hyponatremia was two consecutive tests (interval <24 h) of serum sodium <135 mmol/L.Twenty-six patients with hyponatremia were classified as hyponatremia group , and the other 23 patients without hyponatremia were classified as control group .Ten factors were included in the univariate analysis: age, gender, the highest level of CSCI , the degree of CSCI , the blood albumin when transferred to ICU , the serum sodium when transferred to ICU , the use of glucocorticoid , the incidence of neurogenic shock , the average daily urine output , and the average daily liquid balance .The variables with significance (P<0.05) in the univariate analysis then entered stepwise logistic regression analysis .The optimal critical point of the continuous variables with statistical significance in the univariate analysis was determined by drawing the receiver operator characteristic curve . Results There were differences in two variables between the two groups ( P<0.05 ) .The incidence of neurogenic shock before the occurrence of hyponatremia was 57.7% ( 15/26 ) in the patients with hyponatremia and 26.1% ( 6/23 ) in the patients without hyponatremia(χ2 =6.516,P=0.011).The average daily urine output was (2225 ±389) ml in the patients with hyponatremia and (1936 ±289) ml in the patients without hyponatremia (t=2.924,P=0.005).The stepwise logistic regression analysis indicated that these two factors may be the independent relevant factors (OR =13.708 and 0.996, P =0.004 and 0.002, respectively).The receiver operator characteristic curve demonstrated the average daily urine output more than 2331 ml was the optimal critical point . Conclusion The neurogenic shock and the average daily urine volume more than 2331 ml are the independent relevant factors of early stage hyponatremia in patients with complete CSCI .

Objective To investigate the value of employing pulse indicator continuous cardiac output (PiCCO) for cardiac function monitoring in patients with severe septic shock.Methods A prospective observation was conducted.Thirty-six septic shock patients in Department of Critical Care Medicine of Peking University Third Hospital admitted from August 2011 to December 2013 were enrolled.According to the degree of severity,the patients were divided into PiCCO monitor group and routine monitor group.The PiCCO monitor provided a continuous assessment of fluid resuscitation,vasopressors and inotropes infusion in the patients with severe septic shock.The following cardiac function parameters were assessed in severe septic shock patients on the 1st and 3rd day after intensive care unit (ICU)admission:cardiac index (CI),global ejection fraction (GEF),rate of left ventricular pressure increase (dp/dt max),echocardiography,and blood troponin T (TNT) and B-type natriuretic peptide (BNP).The central venous pressure (CVP),mean arterial pressure (MAP) and the time reaching their standard values,and the norepinephrine dosage and 3-day fluid balance in severe septic shock patients were compared between milrinone and non-milrinone usage groups.The severity degree and outcome were compared between PiCCO monitor group and routine monitor group.Results There were 15 patients in PiCCO monitor group and 21 in routine monitor group among 36 septic shock patients.① In 15 patients with PiCCO monitoring,the patients with decreased CI,GEF,and dp/dt max accounted for 40.0％,93.3％,and 33.3％ at 1 day after ICU admission,and accounted for 60.0％,93.3％,and 60.0％ at 3 days after ICU admission,and it showed that CI,GEF,and dp/dt max was not improved at 3 days after ICU admission.Echocardiography showed that 35.7％ patients had lower left ventricular ejection fraction (LVEF) at 1 day after ICU admission,71.4％ and 71.4％ of patients,respectively,had lower early diastolic mitral flow velocity/early diastolic myocardial velocity (E/Em) and early diastolic mitral flow velocity/end diastolic mitral flow velocity (E/A).Three days after ICU admission,80％ of patients with low LVEF value turned to normal,and diastolic dysfunction was ameliorated in 50％ patients.At 1 day after ICU admission,higher TNT was found in 92.9％ of patients,higher BNP in 100％ of patients,and 3 days after ICU admission,71.4％ and 78.6％ patients showed a decrease in TNT and BNP,respectively.② In PiCCO monitor group,there were no significant differences in initial CVP,MAP and their time reaching standard values,norepinephrine dosage between milrinone group (n =8) and non-milrinone group (n =7).However,3-day intake of liquid in milrinone group was significantly higher than that in non-milrinone group (mL:8 324±3 962 vs.4 372±2 081,t =-2.362,P =0.034).③ Compared with routine monitor group,there was a significant elevation in acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ) score,sequential organ failure assessment (SOFA) score,duration of mechanical ventilation,length of ICU stay and 28-day hospital mortality in PiCCO monitor group [APACHE Ⅱ score:20.67 ± 6.15 vs.14.71 ±4.67,t =-3.304,P =0.002; SOFA score:9.53±3.00 vs.7.52± 1.97,t =-2.433,P =0.020; duration of mechanical ventilation (hours):132 (54-310) vs.63 (14-284),Z =-2.295,P =0.022; length of ICU stay (days):7 (4-15) vs.5 (1-14),Z =-2.360,P =0.018; 28-day hospital mortality:26.7％ vs.0,P =0.023].Conclusion With the use of the PiCCO hemodynamic monitoring in patients with severe septic shock,more comprehensive values of blood volume,systemic vascular resistance and cardiac function can be obtained for guiding fluid resuscitation and selection of vasopressor and inotropic drugs.

Objective To monitor intra-abdominal pressure (IAP) in critically ill patients.Methods A prospective cohort study was conducted.IAP was measured through the bladder technique.Patients were screened for intra-abdominal hypertension (IAH,IAP ≥ 12 mmHg,1 mmHg=0.133 kPa) upon ICU admission.The patients with IAH/abdominal compartment syndrome (ACS) were given appropriate treatment and management for IAH and/or ACS.Mean arterial pressure (MAP),IAP,abdominal perfusion pressure (APP),filtration gradient (FG) and serum creatinine (Cr) were determined in patients with or without IAH,as well as in survivors and non-survivors.Results The entire protocol of IAP measurement was completed in 88 patients.Number of IAH and ACS patients was 25 (28.4％) and 2 (2.3％),respectively.The number of survivors was 80 (90.9％),with 8 (9.1％) non-survivors.Compared with non-IAH patients,IAP and SCr were increased in IAH patients [IAP (mmHg):14.16 ± 2.43 vs.8.13 ± 2.28,t=10.984,P=0.000; SCr (μmol/L):126.72 ± 83.02 vs.73.41 ± 37.59,t=3.087,P=0.005],with a lower FG (mmHg:59.32 ± 17.08 vs.70.24 ± 15.03,t=-2.956,P=0.004).There were no significant differences in MAP and APP between IAH group and non-IAH group [MAP (mmHg):79.18 ± 12.33 vs.88.71 ± 17.34,t=-1.368,P=0.190; APP (mmHg):73.40 ± 16.11 vs.78.37 ± 14.32,t=-1.415,P=0.161].Compared with survivors,non-survivors showed significantly lower APP and FG [APP (mmHg):60.88 ± 14.58 vs.78.56 ± 14.06,t=3.382,P=0.001 ; FG (mmHg):50.38 ± 16.18 vs.68.81 ± 15.44,t=3.208,P=0.002],and higher SCr (μmol/L:129.12 ±83.62 vs.84.36 ± 55.15,t=-2.082,P=0.040).There was no significant difference in IAP and MAP between survivors and non-survivors [MAP (mmHg):71.00 ± 25.46 vs.84.38 ± 13.53,t =1.224,P=0.238 ; IAP (mmHg):10.62 ±5.34 vs.9.76 ± 3.40,t=-0.647,P=0.519].Conclusions Earlier IAP measurements in critically ill patients are essential for the detection of IAH/ACS and renal injury.With appropriate management of IAH/ACS,significant decrease in morbidity and mortality of patients has been achieved.

Objective To study the causes of early death of patients with acute severe cervical spinal cord injury.Methods A retrospective analysis was done on 78 cases of acute severe cervical spinal cord injury,who were treated in our hospital between January 2003 and December 2007.The patients were divided into death group and survival group(survived more than 30 days after the injury).The clinical data including age,level of spinal cord injury,time of injury and admission,surgical treatment,duration between injury and surgery,neurogenic shock,central hyperthermia,hyponatremia,serum level of albumin,percentage of lymphocytes in serum,tracheotomy,and pulmonary infection,were recorded and analyzed. Results The proportion of high-level spinal cord injures(C1-C4) in death group(8/9) was significantly higher than that in the survival group(49/69,?2=18.086,P=0.000).Whereas the duration between injury and surgery in the death group was significantly shorter than that in the survival group(1-12 d,median 2 d vs 1-39 d,median 3 d;Z=-2.664,P=0.008).In the death group,4 of the 9 patients had neurogenic shock,and 4 developed hyponatremia,which were significantly more than those in the survival group(6/69,?2=12.392,P=0.000;19/69,?2=4.526,P=0.033).The percentage of peripheral lymphocyte on admission was(11.84?5.80)% in the death group,which was significantly lower than that of the survival group(19.17?16.64)%(t=-4.006,P=0.000).In the death group,7 patients received tracheotomy,and 8 patients showed pulmonary infection,the proportions were significantly higher than those in the survival group(10/69,?2=29.749,P=0.000;and 15/69,?2=17.266,P=0.000).Conclusions Several factors,including high-level injury(C1-C4),neurogenic shock,pulmonary shock,and tracheotomy,may cause the death of patients with acute severe cervical spinal cord injury in an early stage.

Objective To study the optimal timing of tracheotomy in patients with acute cervical spinal cord injury who need ventilation for a long time . Methods A retrospective research on seventy-nine patients with acute cervical spinal cord injury who underwent tracheostomy in our hospital from January 2011 to December 2015 was conducted .The 79 patients were divided into two groups.The patients with a duration from intubation to tracheostomy less than or equal to 10 days were enrolled in group A , and the duration more than 10 days, group B.The duration of ventilation , the length of ICU stay , and the incidence rate of lung infection were compared between the two groups . Results The duration of ventilation in the group A (192 ±58) h was less than that in the group B (348 ±53) h (t=-12.490, P=0.000).The length of ICU stay in the group A (9.8 ±2.7) d was less than that in the group B (15.9 ±2.2) d (t=-11.058, P=0.000).The incidence of pneumonia in the group A (16.2%, 6/37) was lower than that in the group B (38.1%, 16/42,χ2 =4.686, P=0.030).Mechanical ventilation was successfully withdrawn in 34 and 38 cases of group A and B, without significant difference (χ2 =0.000, P=1.000). Conclusion Early tracheostomy in patients with acute cervical spinal cord injury who need ventilation for a long time could shorten the duration of ventilation and the length of ICU stay , and decrease the incidence of pneumonia .

ObjectiveTo investigate the impacts of sepsis-induced cardiac dysfunction on hemodynamics, organ function and prognosis in the patients with septic shock.Methods A prospective cohort study was conducted in 44 patients suffering from septic shock with the duration< 24 hours admitted to the Department of Critical Care Medicine of Peking University Third Hospital during June 2013 to June 2014. The patients were divided into two groups according to the left ventricular ejection fraction (LVEF) as recorded in echocardiogram at time of admission to the intensive care unit (ICU) as sepsis-induced myocardial dysfunction group (LVEF< 0.50,n= 11) and normal cardiac function group (LVEF≥0.50,n= 33). The cardiac function evaluation and hemodynamics monitoring were performed with echocardiogram and pulse-induced contour cardiac output (PiCCO) on 1, 3, 7 days after the ICU admission. The plasma levels of the biomarkers of myocardial damage, troponin T (TnT) and N-terminal pro-brain natriuretic peptide (NT-proBNP) were measured, and the parameters representing organ function and the 28-day prognosis were collected as well.Results On the ICU admission, central venous pressure (CVP) and left ventricular end-diastolic diameter (LVEDD) were obviously lower in normal cardiac function group than those of myocardial dysfunction group [CVP (mmHg, 1 mmHg = 0.133 kPa): 10±4 vs. 14±6,P< 0.05; LVEDD (mm): 45.0±5.3 vs. 51.8±7.1,P< 0.01], and there was no significant difference in other hemodynamic parameters between two groups. On the 3rd day, all the cardiac function and hemodynamic parameters showed no significant differences between the two groups. On the 7th day, the cardiac index (CI) and pulmonary vascular permeability index (PVPI) of normal cardiac function group were significantly higher than those of myocardial dysfunction group [CI (mL·s-1·m-2): 63.3±13.3 vs. 48.3±10.0,P< 0.05;PVPI: 1.5 (1.4, 1.9) vs. 1.1 (0.7, 1.1),P< 0.01], and no significant difference was found in the other parameters. The plasma levels of TnT and NT-proBNP were found to have no difference at three time points between two groups. There was no difference in the number or the extent of organ dysfunction, including lung, kidney, liver and coagulation system, between the groups at the time of ICU admission. There was no obvious difference in the 28-day survival rate between the myocardial dysfunction group and normal cardiac function group [81.8% (9/11) vs. 72.7% (24/33),χ2= 0.398, P= 0.528].Conclusions Sepsis-induced myocardial dysfunction is a reversible organ dysfunction. It can directly induce decreased left ventricular systolic function and enlargement of ventricle in patients with septic shock without reducing cardiac output or impairing the functions of other organs, or elevating the mortality rate.

OBJECTIVE To study the isolation status and antimicrobial resistance of nonfermenting Gram-negative bacilli collected from intensive care unit(ICU) of our hospital so as to instruct the rational clinical application of antibiotics.METHODS The antimicrobial resistance of nonfermenting Gram-negative bacilli isolates collected from patients in ICU from Jan 2003 to Dec 2007 was analyzed.Antimicrobial susceptibility of clinical isolates were tested by Kirby-Bauer method.RESULTS Total 384 nonfermenting Gram-negative bacilli isolates were collected in 5 years.The most common species were Acinetobacter baumannii(219),Pseudomonas aeruginosa(117) and Stenotrophomonas maltophilla(36).The antimicrobial resistance rate of nonfermenting Gram-negative bacterial to most antibiotics were much higher.The antimicrobial resistance rate of Acinetobacter spp to imipenem,cefoperazone/sulbactam and piperacillin/tazobactam was 3.7%,28.3% and 42.9%.But the resistance rate of Acinetobacter spp to imipenem was increased in recent 2 years(58.0%).The antimicrobial resistance rate of P.aeruginosa to cefoperazone/sulbactam was the lowest.That of imipenem-resistant P.aeruginosa to cefoperazone/sulbactam was 34.0%.S.maltophilla was relatively susceptible to ceftazidime,cefoperazone/sulbactam and piperacillin/tazobactam.CONCLUSIONS Nonfermenters Gram-negative bacilli are the important pathogens in ICU.Surveillance of their prevalence and drug resistance may provide evidences for rational antibiotic choices.

ObjectiveTo determine the effects of perioperative hemodynamic goal directed therapy (GDT) on postoperative infection rates. MethodsWe conducted a systematic review and Meta-analysis.MEDLINE,the Cochrane Library,EMBASE,CNKI and other sources were searched until March 2011.All randomized controlled trials (RCTs) on adult major surgical patients managed with perioperative GDT or according to routine haemodynamic practice were included.Primary outcome measure was specific for type of infection. Two authors independently extracted data and assessed study quality using standardized instruments; Consensus was reached by conference.The Cochrance Collaboration's software RevMan 5.0 was used for data analysis. ResultsSixteen studies were included in the final analysis,providing a sample of 3309 patients. Perioperative GDT significantly reduced surgical site infections (SSI)(OR =0.60; 95％CI0.46-0.74; P ＜0.0001),pneumonia (OR =0.69; 95％CI 0.53 -0.90;P =0.007),and urinary tract infections (UTIs) (OR =0.44; 95％ CI 0.22 -0.88; P =0.02),and there was no heterogeneity between studies (P ＞ 0.1,I2 ＜ 50％ ).A significant decrease in total infection episodes was observed (OR=0.37; 95％CI0.22-0.61; P＜0.00001). ConclusionsA flow-directed hemodynamic therapy protects the high-risk surgical patients against postoperative hospital-acquired infections.

The left ventricular apical systolic dysfunction syndrome was a rare acute cardiac syndrome.Its clinical presentation and electrocardiography were similar to acute myocardial infarction.The syndrome was characterized by transient ventricular wall-motion abnormalities involving the left ventricular apex and mid-ventricle in the absence of obstructive epicardial coronary disease.Cardiac enzyme was normal or minor elevation.At present,the cause of the syndrome is unknown.In this paper,we describe a 56-year-old female patient.She was admitted in hospital for acute appendititis and the transient left ventricular apical ballooning syndrome.She developed acute heart failure and septic shock in the hospital.The drainage of the appendiceal abscess was done and the heart failure and septic shock recovered completely in a few days.

Sepsis is an organ dysfunction caused by dysregulation of the body's response to infection, with high morbidity and mortality. The pathogenesis of sepsis is still unclear, and there are no specific treatment drugs. As a cell energy supply unit, the dynamic changes of mitochondria are closely related to various diseases. Studies have shown that structure and function of mitochondria are changed in different organs during sepsis. The energy shortage, oxidative stress change, imbalance of fusion and fission, autophagy reduce, biological functions of mitochondria play important roles in sepsis progress, which can provide a research target for the treatment of sepsis.
Humans ; Mitochondria/pathology* ; Sepsis/drug therapy* ; Oxidative Stress ; Autophagy