Objective To observe the effect of cardiac massage by subdiaphragmatic compression (D-CPR) on the length of time required from cardiac arrest (CA) to restoration of spontaneous circulation (ROSC),hemodynamics,rate of ROSC,survival rate of 6 h,level of Caspase3 in myocardial cells and apoptosis index (AI) of myocardial cells and compare the effect of standard cardiac massage by chest compression (S-CPR) on those variables in order to choose the more effective resuscitation method for the patient with CA during abdomen operations.Methods A total of 32 healthy New Zealand rabbit were randomly (random number) divided into two groups,namely S-CPR group and D-CPR group (n =16 in each group).All of rabbits were anesthetized with ketamine and Shumianxin (a kind of hypnotics) by intraperitoneal injection,subsequently tracheotomy was made for endotracheal intubation,and right internal jugular vein was catheterized for monitoring central venous pressure (CVP) and left common carotid artery was for indwelling cannula to monitor arterial blood pressure.Lead-2 of ECG was placed.After laparotomy and vital signs of rabbits stabilized for 5 minutes,the endotracheal tube was clamped at the end expiration for 8 minutes to make asphyxial cardiac arrest model.The effects of two different methods were observed and compared in respects of changes in hemodynamics、length of time elapsed from CA to ROSC、ROSC rate and the survival rate in 6 h.The level of Caspase3 in myocardial cells and AI of myocardial cells were detected by using immunohistochemistry staining method and TUNEL,respectively 6 hours after successful resuscitation.Results ①The length of time consumed fiom CA to ROSC in D-CPR group was shorter than that in S-CPR group (P ＜0.05) ②Coronary perfusion pressure (CPP) and MAP 15 minutes after CPR were higher in D-CPR group than those in S-CPR group (P ＜ 0.05).③SBP and DBP after ROSC were higher in D-CPR group than those in S-CPR group.④ROSC rate in D-CPR group was significantly higher than that in S-CPR group (81％ vs.43％,P ＜0.05).⑤Survival rate in 6h in D-CPR group was substantially higher than that in S-CPR group (75％ vs.25％,P ＜ 0.05).⑥HE staining showed that severe myocardial damage manifesting in edema of myocardial cell,indistinguishable cell boundary,and patchy necrosis with infiltration of scanty inflammatory cells were found in S-CPR group.While in D-CPR group,mild myocardial damage in form of slight cellular edema and distinctive cell boundary was observed.⑦Level of Caspase3 in myocardial cells in terms of integrated optical density (IOD) of postive Caspase3 cells was substantially lower in D-CPR group than that in S-CPR group (P ＜ 0.05).⑧Apoptosis index (AI) of cells was lower in D-CPR group than that in S-CPR group (P ＜ 0.05).Conclusions ①The hemodynamics in D-CPR group was more stable than that in S-CPR.group,and D-CPR increased CPP,MAP,ROSC rate and survival rate in 6h,improving achievement of successful resuscitation.②D-CPR was more effective in terms of shortening the length of time for restoration of spontaneous circulation、decreasing level of Caspase3 in myocardial cells、decreasing apoptosis index of myocardial cells and ameliotating myocardial damage from ischemic repeffusion injury.

Starch a natural polymer that is characterized by cheap, regenerative, and good biodegradation is generally mixed with low density polyethylene, high density polyethylene, polypropylene, and polystryrene to prepare degradable materials. In order to relieve "white pollution" due to undegradability of plastic materials, starch is mixed with polyvinyl alcohol, polylactic acid, poly-hydroxybutyric acid, polycaprolactone, chitosan, derivatives, and other degradable polymers to prepare fully degradable biomaterials. With gradual exhaustion of petroleum and progressive depravation of environmental quality, starch that is regarded as a reinforcing agent is widely used in rubber industry. Starch is characterized by hydrophilicity, difficulty in processing, and poor compatibility to plastic materials, rubber, and other polymers, so starch is firstly modified and then mixed with polymers to make starch. This study was designed to summarize the application of starch in plastic materials, rubber, and other polymer blends and to investigate the latest research progresses of starch in polymer materials.

Objective To observe the changes of high mobility group box 1(HMGB1) and nuclear factorκB(NF‐κB) expres‐sion in the hippocampus of rats after cardiopulmonary resuscitation so as to unravel the role of HMGB 1 and NF‐κB in neuroin flam‐mation .Methods Totally 40 Sprague‐Dawley rats were randomly divided into shame‐operated group and recover group [including 2 ,6 ,12 ,24 and 48 h of 5sub‐groups after restoration of spontaneous circulation (ROSC)] .The animals were sacrificed and hippo‐campus were removed at the indicated time .Pathological changes were observed at each time point .The expression of HMGB1 and NF‐κB were determined using RT‐PCR and Western blot respectively .Results There were no histopathological in the hippocampus of rats in shame‐operated group ,brain tissue appeared change of ischemia pathology in recover group ,it was the most severest at ROSC 24 h and still obviously at ROSC 48 h time point .HMGB1 mRNA and NF‐κB mRNA expression in the hippocampus of rats of recover group increased obviously along with the prolongation of time following ROSC and reached its peak at ROSC 24 h(P<0 . 01) ,much higher than that of shame‐operated group ;the HMGB1 level in the hippocampus of rats after recover significantly de‐clined at 2 h after ROSC and increased obviously at 6 ,12 h and reached peak 24 h later ,then decreased 48 h later(P<0 .01) ,there was positive correlation between the expression of HMGB1 and NF‐κB protein .Conclusion HMGB1/NF‐κB signaling pathway may play an important role in the early stages of brain injury after cardiopulmonary resuscitation .Targeted therapies of this path way would be possible to open a new avenue for preventing neuroinflammation after recover .

Objective_To investigate the role of HMGB1 involved in the activation of P38MAPK signal pathway in the hippocampus of rats after cardiopulmonary resuscitation.Methods_Rats were randomly divided into two groups as shame-operated group, CPR group including 2, 6, 12, 24 and 48 h after restoration of spontaneous circulation ( ROSC) (5sub-groups) .The animals were sacrificed and hippocampus were removed at the indicated time.Patholog-ical changes were examined at each time point.Calculated the brain water content by day/wet ration.The HMGB1 mRNA expression was detected by RT-PCR technique.The expressions of HMGB1 and P38MAPK activity were deter-mined using Western blot.Results_There were no histopathological change in the hippocampus of rats in shame-op-erated group, brain tissue appeared change of ischemia pathology in CPR group, it was the most severest at ROSC 24 h.The brain water content, HMGB1 mRNA in rats of CPR group increased obviously along with the prolongation of time following ROSC and reached its peak at ROSC 24 h(P<0.01),much higher than that of shame-operated group, the HMGB1 level in the hippocampus of rats after CPR significantly declined at 2 h after ROSC(P<0.01)and increased obviously at 6, 12 h and reached peak 24 h later(P<0.01), the P38MAPK activity in the hippo-campus of rats after CPR, significantly increased at 2 h after ROSC and reached peak 6 h later(P<0.01), then declined slowly later, much higher than that of shame-operated group.Conclusions_HMGB1 involved in the acti-vation of P38 MAPK signal pathway may play an important role in the early stages of brain injury after CPR.

objective:To observe the effect of high-flow nasal cannula (HFNC) oxygen therapy on patients with acute respiratory failure after gastrointestinal operation under general anesthesia and its efficacy on prognosis.Methods:Totally 107 patients with acute respiratory failure after gastrointestinal operation under general anesthesia in ICU of our hospital were selected from January 2017 to June 2019. Patients were randomly divided into the HFNC group ( n=57) and non-invasive ventilation (NIV) group ( n=50). The changes of pH, PaO 2, PaCO 2, PaO 2/FiO 2, SpO 2, heart rate (HR), respiration rate (RR), and intra-abdominal pressure (IAP) before and after oxygen treatment were compared. The differences of comfort level, duration of oxygen treatment, re-intubation rate, 48-h pulmonary infection rate, incidence of anastomotic fistula, length of stay in ICU, length of hospital stay, hospitalization cost, and 28-day mortality were compared between the two groups. The t test of two independent samples was used for the comparison of normal measurement data. Non-normal data were expressed by median (quartile), fractional count data by case number (percentage), and comparison between the two groups by Chi-square test. Results:PaO 2, PaCO 2, PaO 2/FiO 2 and SpO 2 were not significantly different after 2-h oxygen therapy. PH of the HFNC group was lower than that of the NIV group (7.39 ± 0.04 vs. 7.42 ± 0.03), PaO 2, PaCO 2, PaO 2/FiO 2 and SpO 2 were higher than that of the NIV group [ (89.22 ± 8.70) vs. (84.99± 9.76) mmHg, (41.3 ± 3.43) vs. (39.34 ± 4.21) mmHg, (250.07 ± 18.34) vs. (237.89±19.38) mmHg, (96.14 ± 2.19) vs. (94.78 ± 2.76)%, P <0.05]; pH, PaO 2, PaCO 2, PaO 2 /FiO 2 and SpO 2 were significantly higher in the HFNC group than those in the NIV group [ (7.39 ± 0.04) vs. (7.36 ± 0.04) ; (97.2 ± 12.45) vs. (93.82 ± 12.54) mmHg; (40.84 ± 5.22) vs. (45.10 ± 6.40) mmHg; (277.16 ± 13.98) vs. (248.86 ± 12.81) mmHg, (98.14 ± 1.64)% vs. (95.48 ± 2.71) %] after 12 h oxygen treatment. The HR, RR and IAP of the HFNC group were lower than those of the NIV group, and the differences were statistically significant ( P <0.05). The duration of oxygen therapy in the HFNC group was shorter than that in the NIV group [(32.01 ± 7.57) vs. (40.88 ± 8.89) h], the reintubation rate was lower than that in the NIV group (1.75% vs. 12%), the pulmonary infection rate within 48 h oxygen therapy was lower than that in the NIV group (8.78% vs.30%), and the length of stay in ICU was shorter than that in the NIV group [(5.61 ± 1.73) vs. (7.60 ± 2.31) d], and the hospitalization cost was lower than that in the NIV group ( t = 4.822, P <0. 05). Conclusions:HFNC can improve the oxygenation index of patients with hypoxemia after gastrointestinal operation under general anesthesia, reduce oxygen treatment time, reduced reintubation rate, reduce pulmonary infection rate within 48 h, and improve the prognosis.

Objective:To study the use of laparoscopic hepatic vein guided anatomic hepatectomy in the treatment of hepatocellular carcinoma.Methods:The clinical and follow-up data of 62 patients who underwent laparoscopic anatomic hepatectomy at the Department of Hepatobiliary Surgery of Southwest Hospital of the Army Medical University from January 2015 to February 2018 and met the inclusion criteria of the study were retrospectively analyzed. The operation procedure as to whether the main hepatic vein was exposed or not was determined. The patients were divided into the hepatic vein-oriented hepatectomy (HVOH) group when the main hepatic vein was exposed, and the traditional anatomic hepatectomy (TAH) group when the main hepatic vein was not shown. The perioperative and follow-up data of the two methods were compared.Results:A total of 31 cases were included in the HVOH group, there were 28 males and 3 females, age ranged from 29.0-70.0 (49.9±11.2) years. A total of 31 cases were included in the TAH group, there were 27 males and 4 females, age ranged from 22.0-73.0 (51.4±12.1) years. There were no significant differences in operation time, intraoperative blood loss, postoperative hospital stay, intraoperative conversion to open, and perioperative blood transfusion rates between the two groups ( P>0.05). The incidence of postoperative complication was significantly lower in the HVOH group than in the TAH group [9.7% (3/31) vs. 32.2% (10/31)] ( P<0.05), but no serious complications occurred (Clavein Level IV) in this study. The one-year tumor-free survival rate in the HVOH group was significantly higher than that in the TAH group (77.4% vs. 51.6%), ( P<0.05). There were no significant differences in the 1- and 3-year overall survival rates and tumor-free survival rates between the two groups ( P>0.05). Conclusion:Laparoscopic hepatic vein-guided anatomic hepatectomy for hepatocellular carcinoma had the potential advantages in reducing the perioperative complication rate, and enhanced the early tumor-free survival rates.

Objective:To study the efficacy of laparoscopic limited anatomical hepatectomy (LLAH) for hepatocellular carcinoma (HCC) within the right anterior section.Methods:The clinical data of 144 patients with HCC confined in the right anterior section undergoing hepatectomy at the First Affiliated Hospital of Army Medical University from January 2015 to December 2022 were retrospectively analyzed, including 122 males and 22 females, aged (54.5±9.7) years. Patients were divided into LLAH ( n=27), laparoscopic anatomical hepatectomy (LAH, n=69), and laparoscopic non-anatomical hepatectomy (LNAH, n=48). Propensity score matching was used to compare the operative time, postoperative hospital stay, postoperative complications, serum total bilirubin and albumin, and the prognostic indicators such as tumor-free survival (DFS) rate and cumulative survival rate between the groups. Results:After propensity score matching, there were 26 cases each in LLAH and LNAH group. There was no significant difference in operative time, intraoperative blood loss and postoperative hospital stay between LLAH group and LNAH group (all P<0.05). The total bilirubin and albumin in LLAH on the third day after operation were [ M( Q1, Q3)] 24.1(20.9, 29.1) μmol/L and (35.8±2.9) g/L, better than those in LNAH group 39.3(33.2, 57.0) μmol/L and (33.9±2.5) g/L, respectively. The 1- and 3-year DFS rates in LLAH group were 92.3% and 57.7%, higher than those in LNAH group (80.8% and 19.2%) (all P<0.05). After propensity score matching, there were 25 patients each in LLAH and LAH group. The operative time, postoperative hospital stay and postoperative complications of LLAH group were lower than those of LAH group, and the liver function parameters of LLAH group was also better than those of LAH group (all P<0.05). There was no significant difference in DSF rate between the two groups LLAH group and LAH group ( χ2=0.10, P=0.800). Conclusions:The perioperative outcome of LLAH for HCC within the right anterior section are similar to that of LNAH and better than that of LAH. The DFS of LLAH were better than that of LNAH and similar to that of LAH.

Objective To investigate the application of peripheral perfusion index (PPI) in early diagnosis and goal-directed therapy of septic shock, and to provide reference for the early clinical diagnosis and treatment of septic shock. Methods A prospective single-blind randomized controlled trial (RCT) was conducted. Adult patients with sepsis admitted to emergency medical department and intensive care unit (ICU) of the First People's Hospital of Lianyungang City in Jiangsu Province from January 2013 to December 2016 were enrolled. The patients were randomly divided into two groups (n = 46). The PPI group was defined using PPI < 1.4 as diagnosis of septic shock standard, and PPI > 2 as treatment guide target. Control group was defined according to the traditional diagnostic criteria of shock which systolic blood pressure was less than 90 mmHg (1 mmHg = 0.133 kPa) or systolic blood pressure value decrease> 40 mmHg baseline and bundle treatment was performed. The volume of fluid resuscitation, organ dysfunction, the sequential organ failure score (SOFA), acute physiology and chronic health evaluationⅡ (APACHE Ⅱ) score,continuous renal replacement therapy (CRRT) time, mechanical ventilation (MV) time, the length of ICU stay and 28-day mortality were observed. Results There were 39 and 27 septic shock patients in PPI group and control group respectively. The diagnostic criteria of traditional septic shock with blood pressure as "gold standard", the sensitivity of PPI < 1.4 for septic shock was 94.3%, the specificity was 28.2%, the authenticity was 66.3%, the positive predictive value was 64.1%, the negative predictive value was 78.6%, the positive likelihood ratio was 1.31, the negative likelihood ratio was 0.18. The per capita fluid replacement within 24 hours in the PPI group was significantly higher than that in the control group (mL: 4 601±1 250 vs. 3 458±1 006, P < 0.01), but there was no significant difference in the per capita volume of the patients diagnosed as septic shock (mL: 4 596±1 320 vs. 4 205±1 058, P > 0.05). Compared with the control group, the PPI group treated patients within 48 hours with less vascular active drugs (cases: 6 vs. 15), APACHE Ⅱand SOFA score were lower (48 hours: APACHE Ⅱ was 10.2±2.1 vs. 12.0±3.2; 72 hours: SOFA was 5.1±1.8 vs. 6.0±2.1, APACHE Ⅱ was 8.9±1.8 vs. 9.8±2.2), the period of CRRT and the length of ICU stay were shorter [the period of CRRT (days): 3.0±0.9 vs. 3.6±1.4, the length of ICU stay (days): 5.2±2.1 vs. 6.3±2.9), the difference was statistically significant (all P < 0.05). There was no significant difference in the liver and kidney function index, arterial blood lactic acid (Lac), MV time (days: 3.3±1.4 vs. 3.5±1.2) and 28-day mortality (15.22% vs. 19.57%) between two groups (all P > 0.05). Conclusions The inadequacy of microcirculatory perfusion by oximetry-derived PPI is more sensitive to the diagnosis of septic shock than hypotension of systemic circulation. With PPI guiding the fluid resuscitation of septic shock patients, vasopressors can be withdrawn earlier and the duration of the CRRT and ICU can be decreased.

Objective: To analyze the effect of interposed abdominal pulling-pressing cardiopulmonary resuscitation (IAPP-CPR) and standard cardiopulmonary resuscitation (S-CPR) on hemodynamics and oxygen metabolism in patients with cardiac arrest, and to evaluate the treatment effect of IAPP-CPR. Methods: The patients with cardiac arrest, cardiac arrest time less than 30 minutes, and with S-CPR indications admitted to intensive care unit (ICU) of the First People's Hospital of Lianyungang from January 2017 to January 2019 were enrolled. The patients were divided into IAPP-CPR group and S-CPR group according to whether the patients had IAPP-CPR indication or not. The patients in the S-CPR group were operated according to the 2015 American Heart Association (AHA) CPR guidelines; and the patients in the IAPP-CPR group received the IAPP-CPR on the basis of the S-CRP. During the relaxation period, the patients were subjected to abdominal lifting and compressing with amplitude of 4-5 cm, frequency of 100-120 times/min, and the time ratio of lifting to compressing was 1∶1. Hemodynamic changes during resuscitation were recorded in the two groups. Hemodynamics, oxygen metabolism, arterial blood gas analysis and prognostic indicators were recorded at 30 minutes after successful resuscitation. Results: During the study period, 77 patients were selected, 24 patients were excluded from giving up treatment and quitting, 53 patients were enrolled in the analysis finally, with 28 patients in the S-CPR group and 25 in the IAPP-CPR group. ① The heart rate (HR), mean arterial pressure (MAP) and coronary perfusion pressure (CPP) showed an upward trend during resuscitation, and a more significant increase was shown in the IAPP-CPR group. ② Hemodynamics after successful resuscitation: there were 16 patients with successful resuscitation in the IAPP-CPR group and 13 in the S-CPR group. The MAP, CPP, global ejection fraction (GEF) and stroke volume (SV) of patients with successful resuscitation at 30 minutes after resuscitation in the IAPP-CPR group were significantly higher than those in the S-CPR group [MAP mmHg (1 mmHg = 0.133 kPa): 52.88±3.11 vs. 39.39±4.62, CPP (mmHg): 36.56±6.89 vs. 29.61±6.92, GEF: 0.217±0.036 vs. 0.178±0.027, SV (mL): 38.43±5.25 vs. 32.92±8.28, all P < 0.05], but there was no significant difference in central venous pressure (CVP) or HR between the two groups. ③ Oxygen metabolism after successful resuscitation: the cardiac output (CO), arterial oxygen content (CaO₂), oxygen transport (DO₂) and oxygen consumption (VO₂) of patients with successful resuscitation at 30 minutes after resuscitation in the IAPP-CPR group were significantly higher than those in the S-CPR group [CO (L/min): 2.23±0.38 vs. 1.99±0.29, CaO₂ (mL/L): 158.0±11.8 vs. 141.4±8.2, DO₂ (mL/L): 245.8±29.9 vs. 209.1±28.0, VO₂ (mL/L): 138.2±24.9 vs. 112.8±18.1, all P < 0.05]. ④ Arterial blood gas after successful resuscitation: the values of the pH, arterial oxygen partial pressure (PaO₂), arterial partial pressure of carbon dioxide (PaCO₂), oxygenation index (PaO₂/FiO₂) and central venous oxygen saturation (ScvO₂) of patients with successful resuscitation at 30 minutes after resuscitation in the IAPP-CPR were significantly higher than those in the S-CPR group [pH value: 7.13±0.22 vs. 7.00±0.23, PaO₂ (mmHg): 73.68±13.80 vs. 65.32±15.32, PaCO₂ (mmHg): 36.24±11.77 vs. 29.12±7.82, PaO₂/FiO₂ (mmHg): 73.68±13.80 vs. 65.32±15.32, ScvO₂: 0.628±0.074 vs. 0.589±0.066, all P < 0.05], and the blood lactic acid (Lac) level was significantly lower than that in the S-CPR group (mmoL/L: 9.80±4.28 vs. 12.18±3.63, P < 0.05). ⑤ The patients in the IAPP-CPR group had a shorter time for cardiac arrest to restoration of spontaneous circulation (ROSC) than that in the S-CPR group (minutes: 10.63±2.94 vs. 14.54±3.84, P < 0.01), and the rate of ROSC, CPR successful rate and 28-day survival rate were significantly higher than those in the S-CPR group [64.0% (16/25) vs. 46.4% (13/28), 60.0% (15/25) vs. 28.6% (8/28), 52.0% (13/25) vs. 21.4% (6/28), all P < 0.05]. There was no significant difference in incidence of rib fracture between the IAPP-CPR and S-CPR groups [92.0% (23/25) vs. 89.3% (25/28), P > 0.05], and no abdominal bleeding was found in both group. Conclusion IAPP-CPR can produce better hemodynamic effect during and after resuscitation than S-CPR, and oxygen metabolism and arterial blood gas analysis parameters at 30 minutes after resuscitation were better than S-CPR, with higher ROSC rate, CPR successful rate and 28-day survival rate, and no significant difference in complications between the two resuscitation methods.

Objective: To investigate the value of mechanical power (MP) to predict the potential of the lung recruitment maneuver and assess prognoses in patients with acute respiratory distress syndrome (ARDS). Methods: Patients with moderate-to-severe ARDS who required mechanical ventilation therapy longer than 24 hours were randomly selected April 2017 to April 2019. The lung recruitment maneuver (RM) protocol was performed according to the patient's condition, their MP, lung ultrasound score (LUS), oxygenation index (P/F), and dead volume ratio (Vd/Vt), which were monitored before the RM and one hour after the RM. The patients were divided into the lung recruitment maneuver potential positive group (RMP-P group) and lung recruitment maneuver potential negative group (RMP-N group) according to whether the variation in the patient's RM aeration score (ΔLUS) was≥5. Differences in MP between the two groups were compared and correlations between MP variation (ΔMP), aeration score variation (ΔLUS), oxygenation index variation (ΔP/F), and dead volume ratio variation (ΔVd/Vt) were analyzed. The receiver operating characteristic curve (ROC) was used to calculate the predictive value of MP for the potential of RM and the prognosis (28-day mortality) of patients with moderate or severe ARDS. Results: Eighty-three patients were enrolled in the study, 45 in the RMP-P group and 38 in the RMP-N group. There was no statistical difference in the baseline levels between the two groups (P>0.05). After RM treatment, MP, LUS scores, and Vd/Vt for each patient in the two groups decreased significantly compared to the pre-RM values, whereas, the P/F increased significantly (P<0.05). The MP, LUS scores, and Vd/Vt in the RMP-P group were significantly lower than those in the RMP-N group (P<0.05), whereas there was no difference in the P/F between the two groups after RM treatment (P>0.05). The ΔMP, ΔLUS, and ΔVd/Vt in the RMP-P group were significantly higher than those in the RMP-N group (P<0.05). There was no difference in the ΔP/F between the two groups (P>0.05). There was a significant positive correlation between ΔMP and ΔLUS and ΔVd/Vt in all patients (r=0.4746, 0.3995, P<0.01) and no significant correlation withΔP/F (r=0.0314, P>0.05). The area under the ROC curves of ΔMP for predicting the potential of RM was 0.856, with a sensitivity of 91.1% and a specificity of 63.2%. The AUC of the 28-day survival status was 0.788, with a sensitivity of 84.3% and a specificity of 62.5% (P<0.05). Conclusions Mechanical power monitoring before and after RM can be used to predict the potential of the lung recruitment maneuver and assess the prognosis in patients with moderate-to-severe ARDS.