Objective To investigate the relationship among the oxygen flow or the amount of wetting liquid in humidification bottle and oxygen noise.Method Distilled water were added to one third or half of two sets of oxygen humidification bottle device as the humidification fluid,the noise value generated in the flow rate of 2 L/min,5L/min by two set of inspired oxygen apparatus were recorded.Results Different noise value with same capacity humidifying fluid but different oxygen flow was statistically significant(all P<0.01),the more flow of oxygen the greater the noise; Different noise value generated by the same oxygen flow but different capacity humidifying liquid oxygen was statistically significant(all P<0.01),more humidification fluid,greater the noise. Conclusion Noise generated with the increasing oxygen flow rate and the amount of wetting liquid.

Objective To explore the safety and efficacy of minimally invasive percutaneous nephrolithotomy (MPCNL) for pediatric upper urinary tract calculi. Methods We retrospectively reviewed the clinical data of 35 pediatric patients with upper urinary tract stones treated by MPCNL in our hospital. The series consists of 29 boys and 6 girls with a mean age of 8.5 years (4 to 13 years). Among the 35 cases,7 children had proximal ureteral stones and 28 showed renal stones; 2 of the patients were complicated with ureteropelvic junction obstruction (UPJ). Results Totally 31 (88.6%) of the 35 cases were cured by MPCNL. The one-session success rate was 87.1% (27/31),and two-session success rate was 75% (3/4). Four patients were converted to open surgery because of UPJ-caused ureteral stenosis under the level of the calculi or failure in percutaneous renal puncture. Conclusion MPCNL is safe and effective for renal calculi and proximal ureteral calculi in children.

AIM:To reconstruct the tissue engineering blood vessel by using acellular matrix of porcine thoracic aorta tissue as the scaffold, and by inoculability of vascular endothelial cells (EC) from human umbilical cord vein. METHODS: The porcine thoracic aorta was treated with 1% Triton X-100 for preparing acellular vessel matrix, and the mechanical characterization was in succession modified by freeze-drying and thermal cross-linking techniques. Meanwhile, the mechanics capability of the vessel was measured. The endothelial cells isolated from umbilical cord vein were seeded on the acellular matrix scaffolds by tissue culture in vitro. The structure of acellular matrix was analyzed by light microscopy and scanning electron microscopy. RESULTS: By treatment with 1% Triton X-100 for 84 h, the cells of thoracic aorta were fully come off and the three-dimensional structure of the matrix still remained. After modification by freeze-drying for 24 h and then thermal cross-linking under vacuum at 120 ℃ for 12 h, the tensile strength of the acellular matrix remarkable increased and reached the maximum breaking strength of 1.70 MPa. It was also showed that cultured endothelial cells grew on the surface of acellular matrix for 7 days and the typical structure of vessel-like intimal formation was observed under scanning electron microscopy. CONCLUSION: The acellular matrix and endothelial cells have favorable compatibility. The modified acellular matrix could be a good candidate scaffold for rebuilding the tissue engineering blood vessel.

Objective It was estimated that about 70% patients suffered from mild brain function disturbances after cardiac surgery with CPB Methods for early detection of brain injury after CPB in current use like EEG, transcranial Doppler, CT, MRI are expensive and not sensitive It was repored that combined assays of S 100 protein and NSE were conducive to early detection of brain ischemic injury and prediction of the prognosis The purpose of this study was to assess the changes in cerebral blood S 100 protein and NSE levels during and after open heart surgery with mild hypothermic CPB Methods 15 consecutive ASA Ⅱ Ⅲ patients undergoing elective open heart surgery under CPB were studied Aortic cross clamping time was 30 60 min and CPB time was less than 120 min Patients with hypertension and neurologic or endocrine diseases were excluded Anesthesia was induced with midazolam 0 15mg/kg, fentanyl 5?g/kg and vecuronium 0 1mg/kg Fentanyl 30 50 ?g/kg was continuously infused after tracheal intubation and during CPB Vecuronium was given intermittently to maintain muscle relaxation Midazolam was infused at 0 2mg?kg -1 h -1 during CPB Temperature was reduced to 32℃ 35℃ during CPB Aterial blood pH and PCO 2 were maintained within normal range and Hct between 25% 30% during CPB Internal jugular vein was caunulated and the catheter was advanced retrogradely until jugular bulb Jugular venous blood samples were taken for determination of S 100 protein and NSE content before CPB (A),when mild hypothermia (32℃ 35℃ ) was steadily maintained (B), rewarming to 36℃ (C), 30 min (D),4 6h (E) and 24h (F) after termination of CPB Results (1) After institution of CPB, S 100 protein level increased significantly (P

Objective:To observe acid-base and biochemical changes in clinical orthotopic liver transplantation with veno-venous bypass.Method,Seven patients receiving orthotopic liver transplantation, veno-venous bypass was undergone in anheptic phase.The acid-base and biochemical parameters were monitored during operation. Result:Compared to preoperation,pH decreased a little in each phase,BE and SBC slightly decreased 60 min following bypass and during skin closure. Compared to before bypass,pH had no changes during bypass and new liver phases. The serum Ca~(2+) level decreased and serum glucose level elevated in each phase,The temperature gradually decreased during operation. The serum K~+ level was transiently elevated from 3.17mmol/L to 3.53 mmol/L early after the heptic revascularizaton. Conclusion:With the application of the veno-venous bypass technique,the hazard of acid-base and biochemical changes can be reduced during orthotopic heptic transplantation.

AIM: To probe into the anti-epilepsy action of artificial Calculus Bovis,by observing its effect on the behavioral of the experimental epileptic rats,neuron loss in the hippocampus and hilus,and GAD positive cell alteration in the hippocampus.METHODS: SD rats were divided into three groups: group A(artificial Calculus Bovis treatment group);group B(acute epilepsy group) and group C(control group).A model of acute epilepsy rats was established by PTZ.The rat's behavioral alteration was observed by the Racine' scale.The neurons in the hippocampus and hilus were calculated by Nissl staining.The GAD positive cells were observed by immunohistochemical staining.RESULTS: The latency of the first seizure in group A was longer than that in group B,while the seizure times in group A was less than that in group B.Besides,in group A,both the neuron loss amount in the hippocampus and hilus and the GAD positive cell loss amount in the hippocampus were less than those in group B.CONCLUSION: The artificial Calculus Bovis prolonged the latency of the first seizure time,decreased the frequency of seizure,and prevented the neuron loss and protected the GAD positive cells.

Objective:To explore the diagnostic value of color Doppler ultrasonography for transplanted pancreatic venous thrombosis after simultaneous pancreas-kidney transplantation(SPK).Methods:From June 2019 to September 2022, retrospective analysis was conducted for the relevant clinical data of 181 recipients of SPK.Based upon a presence or absence of clinical high-risk factors, such as a sudden decline of blood/urine amylase, elevated fasting blood glucose and D-dimer, they were assigned into two groups of high-risk(n=48)and non-high-risk(n=133). Color Doppler ultrasonography was performed for evaluating the status of transplanted pancreas and reconstructed blood vessels and diagnosing pancreatic thrombosis post-SPK.Also they were divided into two groups of donor splenic vein thrombosis(n=6)and non-thrombosis(n=39)based upon the presence or absence of splenic vein thrombosis.Various laboratory parameters(fasting blood glucose, blood/urine amylase, fatty acids & D-dimer)and transplanted pancreatic ultrasonic measurements(thickness of transplanted pancreatic head/body/tail, inner diameter & blood flow velocity of donor splenic vein, transplanted pancreatic parenchymal arterial blood flow velocity and resistance index)were recorded.Measurement data were tested for normal distribution and homogeneity of variances.Group comparisons for measurement data fulfilling the criteria of normal distribution and homogeneity of variances were conducted by t-test.For data not fulfilling these criteria, Mann-Whitney U test was utilized.Results:Among 9 cases of pancreatic thrombosis as diagnosed by color Doppler ultrasonography, pancreatic venous thrombosis(n=6)occurred in donor splenic vein.The proportion of transplanted pancreatic thrombosis occurring within Week 2 was 88.9%(8/9)and the proportion of transplanted pancreatic venous thrombosis occurring within Week 2 3.3%(5/6). Fasting blood glucose, blood amylase, urine amylase and D-dimer of high-risk group were(14.7±1.9)U/L, (92.6±15.4)mmol/L, (9.7±1.7)U/L and(6.1±2.2)mg/L.The corresponding values for non-high-risk group were(4.9±0.6)U/L, (209.4±34.4)mmol/L, (168.2±95.7)U/L and(1.3±0.6)mg/L respectively.Statistically significant inter-group differences existed( P=0.021, 0.035, 0.001, 0.017). Pancreatic thrombosis was diagnosed by color Doppler ultrasonography in 9 patients in high-risk group and 8 cases occurred within Week 2 post-SPK.Among 6 cases of pancreatic venous thrombosis, 5 cases occurred in donor splenic veins within Week 2 post-SPK.No significant differences existed in the above parameters between group with donor splenic vein thrombosis and group without donor splenic vein thrombosis( P>0.05). Inner diameters of splenic veins in groups with and without splenic vein thrombosis were(11.7±0.5)and(3.9±0.2)mm.Blood flow velocities in splenic veins were(18.3±8.4)and(40.3±16.6)cm/s respectively.The inter-group differences were statistically significant( P=0.001, 0.006). No significant differences existed in thickness of transplanted pancreatic head/body/tail, as well as blood flow velocity or resistance index in transplant pancreatic artery( P>0.05). Conclusions:Fasting blood glucose, blood amylase, urine amylase, fatty acid and D-dimer are important and yet non-specific biochemical parameters in the diagnosis of pancreatic transplantation thrombosis.Color Doppler ultrasonography may provide valuable imaging diagnostic rationales for making an early diagnosis and providing timely interventions of transplanted pancreatic venous thrombosis post-SPK.It is imperative to enhance dynamic monitoring using color Doppler ultrasound within 1-2 weeks post-SPK.Greater attention should be paid to internal diameter and blood flow velocity of donor splenic vein.