Objective To observe the effects of global ischemia-reperfusion on inhibitory synaptic function in hippocampal CAl region of adult rats.Methods Animals were randomly divided into three groups: sham-operation group(SH),ischemia-reperfusion 3 day(IR-3) and 7 day group(IR-7).Global ischemic episode was achieved by 4-vessel occlusion.Evoked inhibitory postsynaptic currents(eIPSCs) were recorded from CA1 pyramidal cells in hippocampal slices using whole-cell voltage-clamp.Results The eIPSCs amplitudes generated by lower stimulus intensities were significantly decreased in both IR-3 and IR-7 rats as compared with SH rats.Moreover,the rise time of eIPSCs in IR-7 group was significantly decreased as compared with SH group(P

A method was developed for determination of 12 kinds of phosphate compounds in water and sediment by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) coupled with solid phase extraction (SPE) and ultrasonic extraction.The water samples were concentrated by HLB solid-phase extraction (SPE) column and eluted twice with ethyl acetate, ultrasonic solvent extraction for sediment samples and then repeated the operation of water samples after diluted with deionized water.The sample were separated on a ZORBAX Eclipse Plus C18 (150 mm × 2.1 mm, 3.5 μm) column by a gradient elution with 0.2% formic acid aqueous solution and methanol as the mobile phase.Ion mode analysis was monitored by high performance liquid chromatography mass spectrometer (MRM).The target compounds were quantified by external standard method.At the spiked levels (0.05, 0.1 and 0.5 μg/L), the average recoveries of 12 kinds of OPEs in water samples ranged from 66.4% to 115%, except for TMP (28.5%-47.8%) and TEHP (22.4%-73.8%).The relative standard deviation RSD (n=3) was 0.5%-9.09%, and the method quantification (MOQ) was 0.001-0.05 μg/L, However at the spiked levels of 5, 10 and 50 μg/kg, the average recoveries of 12 kinds of OPEs in sediment samples ranged from 65.4% to 120.0%, except for TMP (35.7%-44.9%) and TCEP (31.2%-48.9%).The relative standard deviation RSD (n=3) was 0.01%-9.54%, and the MOQ for sediment was 0.02-2.0 μg/kg dw.Based on the above methods, the detection and analysis of the targets in the water and sediments samples of Taihu Lake were carried out.The results showed that the concentrations of ΣOPEs were 0.1-1.7 μg/L and 8.1-420 μg/(kg dw), respectively.

Objective To evaluate the advantages about video-assisted thoracoscopic surgery (VATS) lobectomy with optimized management of surgical instruments package. Methods A total of 200 patients with lung cancer were enrolled, which included 78 males and 122 females, aged 24-83 years at median age of 56.8 years. All of them were divided into 2 groups including a routine group (n=100) and an optimized management of surgical instruments group (n=100). The total operation time, bleeding, instrument weights, utilization rate of instruments, counted and cleaning time in 2 groups were recorded and analyzed. Results The average operation time and average lost blood of the routine group was 117.62±42.52 min and 53.14±50.69 ml, respectively, and the one of the optimized instruments group was 120.48±40.62 min, 56.10±49.87 ml, respectively, with no significant difference between the two groups (P=0.112, P=0.231, respectively). The utilization rate of instruments in the routine group (58.02%±2.39%) was significantly lower than that of the optimized instruments group (94.00%±1.48%, P=0.014). The counted time, the loading and unloading time and the cleaning time of instruments in the routine group was 112.00±26.00 s, 70.00±15.00 s, 1 010.00±130.00 s, respectively, much longer than the time of the optimized instruments group, which was 65.00±23.00 s, 20.00±4.00 s, 665.00±69.00 s, respectively. There was a statistical difference between the two groups (P=0.028, P=0.011, P=0.039, respectively). The value of instruments in the routine group (177 574.00±14 438.00 yuan) was apparently higher than that of the optimized instruments group(132 027.00±10 311.00 yuan), with a statistical difference (P=0.032). Conclusion It is demonstrated that optimized management of surgical instruments package in VATS lobectomy can greatly improve the utilization rate of instruments and work efficiency, with no effects on the operation time and amount of bleeding in lobectomy.
Thoracoscopic surgery ; surgical instruments package ; lung cancer