Objective To study the responsiveness change of neutrophils when experiencing the second insult after the initial temperature activation in cardiopulmonary bypass (CPB) by using an in vitro model. Methods The neutrophils were isolated from blood which was drawn from each of 60 health volunteers. The samples were divided into 5 groups including normothermia, tepid temperature, moderate hypothermia, deep hypothermia, and rewarming hyperthermia by random digital table with 12 in each group according to the change of temperature during CPB. An in vitro model for studying neutrophil responsiveness was established by using a polymerase chain reaction thermocycler. Five time points were set for each group, including T0: starting CPB, T1: starting rewarming, T2: 0.5 h after rewarming, T3: 1 h after rewarming, and T4: 1.5 h after rewarming. Platelet activating factor (PAF) was added into each group at T2, T3, and T4, and then the value of membranebound elastase (MBE) activity was measured as responsiveness of neutrophils. Analysis of covariance was applied by using SPSS 13.0 for statistic analysis. If the [CM(159mm]covariance had significant difference between main effects, Bonferroni method would be applied for pairwise comparison. Results The main effect difference of neutrophil responsiveness among different groups was statistically different (F=4.372,P=0.002). MBE value had no statistical difference between the normothermia and tepid temperature groups (81.9±4.5 ng/10.6 cells vs. 76.5±3.6 ng/106 cells, P=0.134). while the MBE values in these two groups were higher than those in the other three groups (P=0.001). MBE value in the rewarming hyperthermia group was higher than that in the deep hypothermia group (61.2±2.7 ng/106 cells vs. 50.9±3.7 ng/106 cells, P=0.005). There was no statistical difference between the moderate hypothermia group (56.4±3.2 ng/106 cells) and the rewarming hyperthermia group (P=0.167), so was it between the moderate hypothermia group and the deep hypothermia group (P=0.107). The main effects of neutrophil responsiveness at different time points was statistically different (F=3.566, P=0.03) when PAF was added. MBE value at T4 was higher thanthat at T2 (70.9±2.5 ng/106 cells vs. 59.9±2.3 ng/106 cells, P=0.027). There was no statistical difference among T3 (65.5±1.8 ng/106 cells), T2 (P=0.168), and T4 (P=0.292) in MBE value. Conclusion Normothermia， tepid temperature， and rewarming hyperthermia during CPB can enhance neutrophil responsiveness and MBE release when neutrophils suffer the second insult. There is a time window for neutrophils to be easily activated during rewarming period.
ObjectiveTo observe the impacts of initial therapy on clinical outcome of patients with community-acquired thoracic infection by retrospective analysis. MethodsClinical data of acute community-acquired thoracic infection patients who met the British Thoracic Society diagnostic criteria were collected. The patients were divided into two groups according to whether adequate initial antibiotic therapy and pleural effusion drainage were performed, namely an adequate group (31 patients) and an inadequate group (17 patients). Clinical manifestations, inflammatory markers, hospital stay and hospital costs were analyzed between the two groups. ResultsFor age, gender, infection sites, and coincident diseases, there were no significant differences between the two groups. Compared with the inadequate group, temperature of the adequate group was significantly decreased, especially on hospital day 5, 6, 7[(37.4±0.1)℃ vs. (38.3±0.2)℃, P < 0.001; (37.4±0.1)℃ vs. (37.9±0.1)℃, P < 0.05; (37.4±0.1)℃ vs. (38.1±0.2)℃, P < 0.01]. The level of serum C-reactive protein (CRP) in first week was also significantly reduced in the adequate group[(123.1±13.8) mg/L vs. (182.7±25.3) mg/L, P < 0.05]. However, there were no differences in white cell counts, percentage of neutrophils, or erythrocyte sedimentation rate between the two groups in six-week follow-up. The adequate group had shorter hospital stay[(25±4) days vs. (34±4) days, P < 0.05] and lower hospital costs[(28 367±3 328) yuan vs. (43 334±7 134) yuan, P < 0.05] compared with the inadequate group. ConclusionsThe initial therapy with appropriate antibiotics and effective thoracic drainage can significantly decrease the temperature and CRP of patients with thoracic infection, as well as the cost of hospitalization and the length of stay. Our study reveals that the temperature which is lower than 37.5℃ on the 5th day of therapy and the CRP in the first follow-up week are sensitive predictors of initial treatment effect, which may be helpful to guide the following therapeutic strategies.
Objective To summarize our experience on leaflet extension in reoperation after tricuspid valve repair in children at age≤15 years and to explore the application indicators and skills of this technique. Methods We retrospectively analyzed the clinical data of 23 children who underwent reoperation after tricuspid valve repair in Xinhua Hospital between January 2006 and October 2015. There were 15 males and 8 females with a mean age of 8.7 years, ranging from 5 to 15 years. The leaflet was extended by artificial pericardium patch. After surgery, warfarin anticoagulation therapy was done, and international normalized ratio was maintained 2.0 to 3.0. Results The average cardiopulmonary bypass time was 87-132 (98.5±35.7) minutes, and average aortic cross-clamping time was 56-97 (68.40±23.78) minutes. One patient died in hospital. There were 3 patients with complications including respiratory failure in 1 patient, acute renal failure in 1 patient, and right heart insufficiency in 1 patient. All the children cured and were followed up for 5 months to 10 years, with a mean follow-up of 3.5 years. One patient died during the follow-up. Six patients suffered mild to moderate tricuspid regurgitation and tricuspid valve function of the rest patients was good. No other redo-valve surgery or complications correlated to anticoagulation occurred. Conclusion Leaflet extension in reoperation after tricuspid valve repair in children is useful with optimistic middle to long term efficacy and needs intensive care therapy during the perioperative period.
Taking advantages of the sparsity or compressibility inherent in real world signals, compressed sensing (CS) can collect compressed data at the sampling rate much lower than that needed in Shannon’s theorem. The combination of CS and low rank modeling is used to medical imaging techniques to increase the scanning speed of cardiac magnetic resonance (CMR), alleviate the patients’ suffering and improve the images quality. The alternating direction method of multipliers (ADMM) algorithm is proposed for multiscale low rank matrix decomposition of CMR images. The algorithm performance is evaluated quantitatively by the peak signal to noise ratio (PSNR) and relative l2 norm error (RLNE), with the human visual system and the local region magnification as the qualitative comparison. Compared to L + S, kt FOCUSS, k-t SPARSE SENSE algorithms, experimental results demonstrate that the proposed algorithm can achieve the best performance indices, and maintain the most detail features and edge contours. The proposed algorithm can encourage the development of fast imaging techniques, and improve the diagnoses values of CMR in clinical applications.
Objective To summarize diagnosis and treatment outcomes of coronary arterial fistulas （CAFs） so as to improve surgical results. Methods Clinical data of 23 patients with CAFs who underwent surgical repair in Xinhua Hospital，School of Medicine，Shanghai Jiaotong University from July 2006 to January 2013 were retrospectively analyzed. There were 15 male and 8 female patients with their age of 35.4±8.7 years. CAFs originated from left anterior descendingartery in 7 patients，right coronary artery in 13 patients，dual coronary arteries in 1 patient，left main coronary artery in 1 patient，and obtuse marginal artery in 1 patient. CAFs drained into pulmonary artery in 16 patients，right ventricle in 5patients，and right atrium in 2 patients. Twelve patients received surgical repair under off-pump condition with beating heart，and the other 11 patients underwent surgery under cardiopulmonary bypass （CPB）. Surgical techniques included extracardiacgasket interrupted suture ligation，intracardiac mattress suture ligation，intracardiac gasket interrupted suture for fistula repair，and a combination of intracardiac suture ligation and extracardiac repair. Results There was no in-hospital death or seriouspostoperative complication in this group. For the 11 patients undergoing surgical repair under CPB，average CPB time was 78.6±7.4 minutes，and average aortic cross-clamping time was 39.0±5.9 minutes. Postoperatively，patients’ heart functionrecovered well，their symptoms disappeared，and there was no myocardial ischemia or residual fistula. Twelve patients werefollowed up at the outpatient department and via telephone for 3 months to 6 years after discharge. During follow-up，theirheart function all recovered well，and echocardiogram detected no abnormality. There was no late death，myocardial ischemiaor residual fistula. Conclusion All CAFs patients need early surgical repair once their diagnosis is clear. Appropriate surgical strategies should be chosen according to the characteristics of pathological anatomy and associated intracardiaclesions. Surgical outcomes are satisfactory.
ObjectiveTo summarize our experience of emergency coronary artery bypass grafting (CABG) for the treatment of coronary accidents during percutaneous coronary intervention (PCI). MethodsFrom January 2011 to January 2013, 30 patients with coronary accidents during PCI from our hospital and other hospitals received surgical treatment in Xinhua Hospital, Medical School of Shanghai Jiaotong University. There were 21 male and 9 female patients with their age of 68±11 (54-84) years. Coronary accidents included coronary artery dissection in 12 patients, coronary artery perforation in 12 patients, acute in-stent thrombosis in 2 patients, dilation balloon rupture in 1 patient and balloon retention in 1 patient, and PCI guidewire retention in 2 patients. Among the 30 patients, 8 patients received intra-aortic balloon pump (IABP) implantation preoperatively. All the patients underwent emergency CABG, including 29 patients undergoing off-pump CABG and 1 patient undergoing CABG on pump with heart beating. The patients' medical history, PCI and surgical records were retrospectively reviewed, and surgical treatment strategies, clinical outcomes and prognosis were summarized. ResultsThe average number of grafts was 2.8±0.4. Postoperative length of ICU stay was 8.3±4.8 days, and mean hospital stay was 20.3±15.2 days. Postoperative complications included low cardiac output syndrome (LCOS) in 3 patients, tracheotomy in 2 patients, acute renal failure requiring continuous renal replacement therapy in 2 patients, and reexploration for bleeding in 1 patient. Twenty-eight were discharged, 1 patient died of multiple organ dysfunction syndrome caused by LCOS, and another patient died of refractory ventricular fibrillation. A total of 26 patients were followed up for 10.2±8.3 months and 1 patient died of stroke during the following up. ConclusionEmergency CABG can restore coronary artery blood flow quickly and provide good results for coronary accidents during PCI.
ObjectiveTo compare the outcome between two nutrition support methods, total enteral nutrition (TEN) and enteral nutrition combined with parenteral nutrition, in infants after ventricular septal defect (VSD) repair operation. MethodsWe retrospectively analyzed the clinical data of 76 infants who underwent VSD repair operation in Xinhua Hospital in 2012 year. There were 46 males and 35 females aged 1.6-11.9 (5.5±2.5) months. Nutrition support was started from the first day after operation. There were 35 patients in the group A with TEN 60 kcal/(kg·d), and 41 patients in the group B with both enteral nutrition at 30 kcal/(kg·d) and parenteral nutrition at 30 kcal/(kg·d). ResultsThere was no statistical difference between two groups in demography data and preoperative clinical indicators. The number of patients suffered abdominal distension and gastric retention was more in the group A (22.9% vs. 4.9%, 68.6% vs. 2.4%, P<0.05). There was no difference in diarrhea. The completion of nutrition support in the group A was worse than that in the group B. In the group A, only 40% of the goal calorie was finished on the first and the second day after operation. It was improved until the third day, and the goal calorie could be finished on the seventh day. In the group B, the nutrition support method could be finished on the first day. The prealbumin level in the group B was significantly higher on the third, fifth and seventh day (P<0.05). The blood urea nitrogen (BUN) level in the two groups on the first day after operation was higher than that before operation (P<0.05), and persisted in the group A, while decreased to the normal level gradually in the group B. Following up to discharge, the weight was higher and the length of stay was shorter in the group B (P<0.05). There was no statistical difference in the cost of hospitalization between the two groups (P>0.05). ConclusionThe nutrition support method, enteral nutrition combined with parenteral nutrition, is better than TEN for infants after VSD repair operation.
Objective To investigate the influence of T helpers 17 (Th17) cells, regulatory T (Treg) cells and their related cytokines on postoperative atrial fibrillation (POAF) after coronary artery bypass graft (CABG). Methods A total of 132 consecutive patients undergoing CABG between May 2013 and July 2016 were recruited. There were 82 males and 50 females with the age ranging from 39-76 years. Venous blood samples were collected within 2 hours after surgery. The expression of Th17 cells, Treg cells and their related cytokines in the peripheral blood was determined. Results POAF occurred in 35 patients (a POAF group) and 97 patients did not develop POAF (a No POAF group). Compared to the No POAF group, the proportion of Th17 cells and Th17/Treg ratio in the peripheral blood significantly increased in the POAF group (P>0.05) while proportion of Treg cells remained no significant change (P>0.05). The expression of Th17-related cytokines (IL-6, IL-8 and IL-17) all obviously increased in the POAF group (P>0.05). However, no significant difference was found in the expression of Treg-related cytokines (IL-10 and TGF-β) between the two groups (P>0.05). Conclusion Th17/Treg is unbanlanced in POAF patients and regulation of this imbalance may decrease the occurrence of POAF.