Objective To compare the therapeutic effect and safety of naloxone ,flumazenil and naloxone combined wiht flumazenil in treating acute diazepam poisoning and to find out ideal therapeutic treatment.Methods 45 patients were divided into three groups at random: naloxone group (n=15), flumazenil group (n=15) and naloxone combined with flumazenil group (n=15). Besides given the same routine therapy to each group, naloxone group received 0.4mg naloxone through intravenation and 1.2mg naloxone through intravenous drip; flumazenil group received 0.1mg flumazenil through intravenation and 0.9mg flumazenil through intravenous drip; naloxone combined with flumazenil group received 0.4mg naloxone and 0.1mg flumazenil through intravenation and 1.2mg naloxone and 0.9mg flumazenil through intravenous drip. Each patient's consciousness status was graded after given drug treatment 0, 5,15,60,90,180 minute. Testing the BR, SR, CK, CK-MB of every patient and recording to the Bp, HR, RR, SpO 2 and the rhythm of the heart continuously. Results At the point of 5 minute, the therapeutic efficiency of the group with combined drug use was higher than that of the naloxone group ( P

Objective:To explore the effect and mechanism of AMPK on apoptosis of alveolar epithelial cells induced by endoplasmic reticulum stress in COPD rats.Methods:the rats were divided into three groups:control group,model group,AICAR intervention group,establishment of rat model of chronic obstructive pulmonary disease by smoking smoke inhalation and intratracheal instillation of lipopolysaccharide.The HE staining of rat lung tissue pathological observation,immunohistochemical detection of p-AMPK /AMPK,western blot the expression of Caspase-3,ORP 150,and CHOP.Apoptosis were detected by TUNEL method.Results:the HE staining showed that the model group of pulmonary bullae formation,inflammatory cell infiltration,inflammatory ceils in AICAR group was lower than that of model group.Compared with the normal control group,immunohistochemistry and Western blot showed that p-AMPK/AMPK and ORP150 protein expression decreased in the model group,the difference was statistically significant (P＜0.05),and AICAR in the intervention group p-AMPK/AMPK and ORP150 protein expression were significantly increased compared with the model group,the difference was statistically significant (P＜0.05).Endoplasmic reticulum stress related apoptosis The expression of CHOP and caspase-3 apoptosis index increased significantly in the model group,there was significant difference compared with normal group (P＜0.05),while in group AICAR,apoptosis index down significantly compared with the model group.Conclusion:AMPK can protect alveolar epithelial cells from cigarette smoke induced endoplasmic reticulum stress and apoptosis,it was possible to achieve its protective effect the increase of ORP150.

Objective To explore the effect of oxytocin on uterine fibroids treated by ultrasound ablation. Methods Eighty-two single points in 29 uterine fibroids from 26 patients were sonicated with magnetic resonance imaging guided by high intensity focused ultrasound before and after using oxytocin. The required total energy, sonication time required to reach 60 ℃ and the acoustic energy for increasing 1 ℃ of temperature at the single point before and after using oxytocin were compared. Results Before intravenous infusion of oxytocin, the average total sonication energy required to reach 60 ℃ was (5320 ±910) J and it took (21 ±20) seconds for sonicating a single point, the energy required for increasing 1 ℃ was (255 ± 302) J. In contrast, after intravenous infusion of oxytocin, the average total sonication energy required to reach 60 ℃ was (2890 ±325) J, and it took (12 ±7) seconds for sonicating a single point, the energy required for increasing 1 ℃ was ( 126 ± 94 ) J. Those three index all reached statistical difference ( P = 0.002, P = 0.001, P= 0.002, respectively). Conclusion It seemed that Oxytocin could significantly decrease the energy required for ablating uterine fibroids, shorten treatment time and improve the treatment efficiency.

Objective To investigate the effect of morphine preconditioning on mitochondrial permeability transition pore (MPTP) and its protective mechanism after myocardial ischemia-reperfusion injury. Methods A rat model of ischemia-reperfusion injury was established. Forty rats were injected with 2-3[H] DOG and then divided into 4 groups randomly: a sham operation (S) group, an ischemia-reperfusion injury (IR) group, a morphine preconditioning (Mp+IR) group, and a cyclosporine A preconditioning (CsA+IR) group. We monitored the concentrations of serum creatine kinase-Mb (CK-Mb) and cardiac troponin I (cTnI), and measured myocardial mitochondrial 2-3[H] DOG, cytochrome c content, Ca2+ concentration ([Ca2+]m), the velocity of Ca2+ intake and reaction half time of mitochondrial permeability transition pore (MPTP t1/2) in the 4 groups. Results The concentrations of serum CK-Mb and cTnI decreased more in the Mp+IR group and the CsA+IR group than those of the IR group. The concentrations of 2-3[H]DOG and [Ca2+]m in the IR group were evidently higher but the level of cytochrome c was lower than those of the sham operation group. The concentrations of 2-3[H] DOG and [Ca2+]m in the Mp+IR group decreased whereas the concentration of cytochrome c increased compared with those in the IR group. Mitochondrial 2-3[H]DOG content was positively correlated with the concentration of calcium (r=0.797, P<0.01). The 2-3[H]DOG and [Ca2+]m content were negatively correlated with cytochrome c in the IR group (r=-0.805 and r=-0.648, respectively, P<0.01). MPTP t1/2 in the IR group was shortened evidently, and that in the Mp+IR and CsA+IR group was significantly lengthened. Conclusion Morphine preconditioning may have myocardial protective effect through unburdening the calcium overload and lengthening the MPTP t1/2.

Objective The aim of this study is to establish a practical VX2 tumour model less than or equal to 10 mm from large blood vessel(as standard) for HIFU ablation .Methods 15 New Zealand rabbits were involved ,VX2 tumour blocks were inoculated near postcava through spine path ,and tumour rate was observed two weeks later by anatomy and MRI .Results Three experimental rabbits did not survive ,all the rest of the 12 into the tumour ,assembly tumour rate was 100% (12/12);The tumour rate reaching the standard accounted for 75% (9/12) ,the average distance between the tumour and the inferior vena cava was (5 .6 ± 3 .4)mm . Conclusion It is feasible to establish the VX2 tumor model less than or equal to 10 mm from large blood vessel through spine path .

OBJECTIVEThe aim of this experiment is to find proper cell carrier for skin tissue engineering.

METHODSVarious concentration of fibroblasts were seeded onto HA-ECM and cultured in vitro. The performance of cells' growth, array, adhesion and collagen secretion on HA-ECM was observed with light microscope and transmission electron microscope.

RESULTSThe fusiform fibroblasts oriented radiantly or longitudinally and closely packed onto the HA-ECM, they attached firmly and proliferated to confluence on the stromal surface of HA-ECM.

CONCLUSIONThe optimal cell concentration is 3.5 x 10(6)/ml, HA-ECM is ideal carrier for fibroblasts because of its excellent scaffold and diffusion characteristics. Futhermore, it has the bioactive molecules such as fibronectin and laminin which play an important role in fibroblasts attachment and proliferation on HA-ECM.

Amnion ; cytology ; Animals ; Cell Culture Techniques ; methods ; Cells, Cultured ; Extracellular Matrix ; Female ; Fibroblasts ; cytology ; Hematoxylin ; Humans ; Microscopy, Electron, Scanning ; methods ; Rabbits

OBJECTIVE: To determine the mechanism of protective effect of noninvasive limb ischemic preconditioning (NIPC) on myocardium of patients with rheumatic heart disease undergoing heart valve surgery under cardiopulmonary bypass (CPB). METHODS: A total of 32 patients with rheumatic heart disease undergoing heart valve surgeries under CPB were randomly divided into 2 groups: a control group(n=16)and an NIPC group(n=16).Tourniguet was used for each patient in the NIPC group around both the upper extremities in turn, inflated for 8 min and deflated for 5 min for 3 cycles. After the anesthesia, the remaining procedures were the same as in the control group. Blood samples were collected from the central vein after the induction of anesthesia (T(1)), 5 min before aortic clamp (T(2)),30 min after aortic opening (T(3)), 6 h after the operation (T(4)), and 24 h after the operation (T(5)) to measure the concentration of cardiac troponin I and creatine kinase MB in the plasma and CGRP and ET-1 in the serum. Pathologic change of the right auricle of the heart tissue during the superior vena cave intubation and extubation was detected. RESULTS: The content of cardiac troponin I and creatine kinase MB at T(4) and T(5) in the 2 groups was higher than that of other time points in the same group, and it reached the peak at T(5). Comparison of the content of cardiac troponin I and creatine kinase MB at T(4) and T(5) in the 2 groups showed significant difference, and that of the NIPC group was lower than the control group(P<0.05).CGRP and ET-1 contents reached the peak at T(2) in the NIPC group and at T(3) in the control group, but the peak of CGRP in the NIPC group was higher than that in the control group(P<0.01).The peak of ET-1 content in the NIPC group was lower than that in the control group(P<0.01). After the CPB, myocardial and mitochondrion impairment was lighter in the NIPC group than in the control group. CONCLUSION Noninvasive limb ischemic preconditioning can protect the myocardium through increasing CGRP, inhibiting ET-1, and advancing the peak of CGRP and ET-1.
Adult ; Arm ; blood supply ; Calcitonin Gene-Related Peptide ; metabolism ; Cardiopulmonary Bypass ; Female ; Granulins ; Heart Valve Diseases ; surgery ; Heart Valve Prosthesis Implantation ; methods ; Humans ; Intercellular Signaling Peptides and Proteins ; metabolism ; Ischemic Preconditioning ; methods ; Male ; Middle Aged ; Mitral Valve ; surgery ; Myocardial Reperfusion Injury ; prevention & control ; Rheumatic Heart Disease ; surgery

The present study was aimed to investigate the pathological changes after magnetic resonance imaging (MRI) guided high intensity focused ultrasound (MRgHIFU) therapy for ablating the liver tissue adjacent to goat portal vein. Fifty goats were involved in this study. Normal liver tissues at 0, 5, and 10 mm distance from portal vein, respectively, were ablated with MRgHIFU. Among the 50 tested subjects, 40 goats were sacrificed immediately after the operations, and the other 10 were sacrificed 7 days after the procedure for pathological examination of the targeted areas and the contiguous portal veins. Coagulation necrosis was observed in all the treated liver tissues. Collagen swelling (CS) and vessel wall fracture (VWF) emerged more frequently in the 0 mm group than that in the 5mm group: CS [0 mm group VS 5mm group = 27/40 (67.5%) VS 7/40 (17.5%), P < 0.05], VWF [0 mm group VS 5mm group = 8/40 (20%) VS 0/40 (0%), P < 0.05]. Seven days after ablation, no portal vein damages (CS and VWF) were observed under light microscope. The results indicated that MRgHIFU could be used to ablate the liver tissue adjacent to goat portal vein effectively, which may cause blood vessel damage when the focus is on the wall of blood vessels (0 mm). However, the pathological results indicated that these damages are reversible.
Animals ; Female ; Goats ; High-Intensity Focused Ultrasound Ablation ; adverse effects ; methods ; Liver ; pathology ; Magnetic Resonance Imaging ; Male ; Portal Vein ; pathology

OBJECTIVETo repair rabbit tendon defects with tissue engineering method.

METHODSThe third passage of fetal skin fibroblast cells was labeled with 5-bromo-2' deoxyuridine (Brdu) and then seeded on human amnion extracellular matrix (HA-ECM). Using 1 cm-long-Achilles tendon defects as repairing models in the experimental group, tendon defects were core bridged with polydioxanone (PDS) and then capsulated with the complex of fibroblasts-HA-ECM. In the control group I, defective tendons were sutured with PDS following the former procedure and capsulated with HA-ECM (without fibroblasts). In the control group II, only PDS was applied to connect the defective tendons. Gross examination, light microscopy, scanning electronmicroscopy and biomechanical measurement of the repaired tendons were respectively performed at postoperative 1, 2, 3 month as well as immunohistochemical examination.

RESULTSThe optimal cell concentration for seeding fibroblasts was 3.5 x 10(6) cells/ml. Cells grew well and radiated or paralleled on HA-ECM. Immunohistochemistry showed that the labeled seed fibroblasts played an important role in tendonization. The results of light microscopy, electron microscopy, and biomechanical assessment suggested that the rate and quality of tendonization in the experimental group was superior to those of the control group I and II. The tensile strength in the experimental group was the greatest, the next was in the control group I, and the worst in the control group II (P<0.05).

CONCLUSIONSHA-ECM is the excellent carrier for fibroblasts. Fibroblasts-HA-ECM complex has the capability to repair tendon defect and to tendonize with rapid rate and good performance three months after operation. Its tensile strength is 81.8% of that of normal tendon.

Amnion ; transplantation ; Animals ; Cells, Cultured ; Extracellular Matrix ; Fibroblasts ; cytology ; Immunohistochemistry ; Microscopy, Electron, Scanning ; Polydioxanone ; Rabbits ; Suture Techniques ; Tendons ; surgery ; ultrastructure ; Tensile Strength ; Wound Healing ; physiology

This study was aimed at exploring the high intensity focused ultrasound(HIFU) therapeutic dosimetry and its biologic effect. In-vitro, bovine liver was immersed into 0.9% NS and degassed for application. The JC Model-focused ultrasound tumor therapeutic system was used in the experiment. The HIFU parameters were: frequency 1.6 MHz, depth 20 mm, acoustic power from 16.44 W to 196.32 W. Under each power, at radiating times from is to 20 s, bioptic specimens were obtained from all samples. The results showed when the acoustic power was equal to or higher than 179.96 W, only is of radiating is adequate to induce coagulative necrosis, and when the acoustic power was lower than 65.44 W, the radiating time to produce coagulative necrosis was about 7 s. In the range of 65.44-179.96 W, at each time when the acoustic power was set up with an increment of 16.36 W, the time to produce coagulative necrosis was 1-2 s shorter. The form of biological focal region (BFR) varied with the acoustic power and HIFU irradiation time. The size of BFR increased with the increase of HIFU irradiation dosage (acoustic power x exposure time). There is positive correlation between the size of BFR and the dosage of HIFU irradiation (y = 0.0164x(1.05591), R5 = 0.9238, P < 0.05).
Animals ; Cattle ; In Vitro Techniques ; Liver ; pathology ; radiation effects ; Radiation Dosage ; Ultrasonic Therapy ; instrumentation ; Ultrasonics