Objective: To prepare valved mitral stent and to discuss the feasibility of transcatheter implantation of the valved mitral stent in vitro. Methods: We designed a self-expandable stent made of super-elastic Ni-Ti shape memory alloy. The stent was composed of double disks with tubular linkage between them. A valvular ring made of nitinol wire was sutured on the tubular part. Fresh sheep pericardium was cross-linked with a 0.6% glutaraldehyde solution for 36 hours then sutured into a valvular ring; the latter was sutured onto the nitinol self-expandable stent. Through a sheath across the interatrial septum positioned in the left ventricle of isolated sheep heart via vena cava, the device was delivered into the native mitral valve position. When the left ventricle disk was deployed, it was applied to the mitral annulus by pulling back the external sheath. The waist and the left atrial disk were deployed by pulling the sheath in the annulus and left atrium, respectively. Thus the whole device was deployed in the mitral native. Water was injected into the pulmonary veins and left ventricle to test competence of the prosthetic heart valves. Results: The prepared valved mitral stent could be stably positioned at the native valves. There was no stent migration when it was repeatedly pulled. The two disks sandwiched the native mitral valve with one disk lying in the left ventricle and the other one in the left atrium. The prosthetic heart valves showed satisfactory function without structure damage. Conclusion: This self-expandable stent is well designed and can be safely implanted in the mitral valve position via transcatheter approach, and the function of the stent is satisfactory.

OBJECTIVETo discuss the treatment strategy of acetabular fractures and unstable pelvic fracture of the hip and to evaluate its outcome.

METHODSRetrospective analysis of clinical data in 32 patients with unstable pelvic fracture and acetabular fractures from January 2007 to June 2013 were collected. There were 18 males and 14 females aged from 18 to 62 years old (means 38 years old). According to Tile classification of pelvic fracture, 11 cases were type B1, 8 were type B2.1, 7 were type B2.2, 3 were type C1.1, 2 were type C1.2, 1 was type C3. According to Judet-Letournel classification, anterior column fracture was in 1 case, transverse fracture in 8, transverse plus posterior wall fracture in 6, T-type fracture in 1, anterior column plus half transverse fractures in 5, double column fracture in 11. Other combined injuries were treated early, the surgical operation were performed after stable condition. The hip joint function and the fracture reduction were assessed during follow-up.

RESULTSThe operative time was from 1.8 to 6.5 hours (averaged 3 hours). Two fat patients' incision occurred in fat liquefaction and healed after dressing, no incision infection happened. Only 1 case was lost to follow-up, 31 patients were followed up with a mean time of 23 months (6 to 42 months). The healing time of pelvic fracture was from 8 to 18 weeks (averaged in 10.6 weeks). The hip function was evaluated according to the Matta and Tornetta standard postoperatively, the result was excellent in 15 cases, good in 14 cases, fair and poor in 1 case respectively. The Majeed score of the hip function was 83.65? 7.67, the result was excellent in 15 cases, good in 12 cases and fair in 4 cases. The healing time of acetabular fractures was from 8 to 16 weeks (averaged in 10.2 weeks). The fracture reduction was assessed by Matta standard, the result was excellent in 15 cases, good in 12 cases and fair in 4 cases. The heterotopic ossification was evaluated by Brooker standard, 4 cases were grade I, 1 case was grade II . There were no infection, nonunion and necrosis of the femoral head in all patients. The nerve damage symptoms in 5 patients disappeared during 4 to 6 months after operation.

CONCLUSIONPatients with unstable pelvic fractures and acetabulum fractures were in a critical condition early, using the concept of damage control to save lives in a timely manner. Grasp the operation time in the late treatment, acetabulum fractures reach anatomical reduction as far as possible, pelvic fractures are given priority to stable reconstruction. The operation order was fixed pelvic ring first, according to the condition to choose the appropriate surgical approach and fixed mode.

Acetabulum ; injuries ; surgery ; Adolescent ; Adult ; Female ; Fracture Fixation, Internal ; Fractures, Bone ; surgery ; Humans ; Male ; Middle Aged ; Pelvic Bones ; injuries ; surgery ; Retrospective Studies ; Treatment Outcome ; Young Adult

Objective To investigate drug resistance and genotypes of methicillin-resistant Staphylococcus aureus (MRSA) isolated from intensive care unit (ICU). Methods MRSA strains were isolated from patients, medical staff and environment of hospital ICUs. Disk diffusion (K-B method) was used for drug resistance testing; Staphylococcal cassette chromosome mec (SCCmec) and Staphylococcal protein A (spa) typing methods were used for genotyping and identifying the homology. Results There were 78 strains of Staphylococcus aureus isolated including 62 isolates of MRSA, which were mainly from the burn ICU (22, 35.48%). Among 62 MRSA strains, 50 were hospital acquired strains, in which 43 isolates were of SCCmec Ⅲ, 4 of SCCmec Ⅰ and 3 of SCCmec Ⅱ. Twelve isolates could not be typed. Twenty-eight out of 37 hospital acquired isolates were typed by spa typing as SCCmec Ⅲ-t030, which belonged to the same clone. Conclusion MRSA in ICU is multi-drug resistant and SCCmec Ⅲ-t030 is the most prevalent genotype, which indicates that clinical MRSA strains and environmental MRSA strains may be homologous.

The fibrous roots are the residues of production of cut crude drug of Danshen (Salvia miltiorrhiza). Enzymatic pretreatment and ultrasonic extraction are beneficial to extract effective constituents from fibrous roots more effectively. The present research was to optimize the enzymatic parameters by the central composite design and response surface method. Under the best conditions, the yields of total tanshinones and total salvianolic acids in the extracts of enzymatic pretreatment increased by 113.92% and 30.64%, comparing with the non-enzymatic extraction, respectively. TLC analysis also showed that the types of effective constituents in the two samples were not affected by enzymatic hydrolysis. Meanwhile, the complex correlation coefficients of the mathematical models were high, which provided a good prediction.
Diterpenes, Abietane ; Drugs, Chinese Herbal ; chemistry ; Phenanthrenes ; chemistry ; Plant Roots ; chemistry ; Salvia miltiorrhiza ; chemistry

OBJECTIVETo evaluate the application of nephron-sparing surgery (NSS) in the treatment of renal cell carcinoma (RCC).

METHODSThe clinical data of 221 RCC patients who received nephron-sparing surgery were retrospectively reviewed. Open surgery was performed for 203 cases and laparoscopic surgery for 18 cases. The renal arteries were blocked and ice fragments were used for 115 patients. Biopsy was performed on renal tissue adjacent the tumor for 136 patients. After operation 156 patients were treated with interferon and interleukin II. Among these 221 patients, 132 patients (59.7%) were followed for 3-56 months (mean: 28 months).

RESULTSThe mean distance from the edge of normal tissue to the tumor was 0.4 cm (0.2-1.0 cm). The mean volume of blood loss was 180 ml (50-1 000 ml). Pathological examination showed clear cell carcinoma (n = 195), chromophobe renal carcinoma (n = 12), papillary renal carcinoma (n = 7), cystic renal carcinoma (n = 6), and sarcomatoid clear cell carcinoma (n = 1). Biopsies in 136 patients showed negative results. Post-operative complications included leakage of urine (n = 1), hemorrhage or hematuria (n = 5), and infarction of blood vessel of lower limbs (n = 2). During the follow-up, no patients died for this reason, although tumor recurrence (n = 4, 1.8%) and metastasis (n = 3, 1.4%) were noted.

CONCLUSIONNSS is a safe and effective method to treat carefully selected RCC patients.

Adult ; Aged ; Carcinoma, Renal Cell ; surgery ; Female ; Follow-Up Studies ; Humans ; Kidney Neoplasms ; surgery ; Male ; Middle Aged ; Nephrectomy ; methods ; Nephrons ; surgery ; Retrospective Studies ; Young Adult

AIMTo study the effect of ZD7288 on synaptic transmission in the pathway from perforant pathway (PP) fibers to CA3 region in rat hippocampus.

METHODSThe extracellular recording technique in vivo was used to record the CA3 region field potentials. High-performance liquid chromatography (HPLC) with fluorescence detection was applied to measure the content of amino acids in hippocampal tissues. The effect of ZD7288 and CsCl on the amplitudes of population spike (PS) in CA3 region evoked by stimulation (0.5 Hz) of the perforant pathway (PP) fibers, and the content of amino acids in hippocampal tissue were observed.

RESULTSMicroinjection of ZD7288 (20, 100 and 200 nmol) and CsCl (1, 5 and 10 micromol) into CA3 region decreased the population spike (PS) amplitudes in a dose-dependent manner. The inhibitory effects appeared at 5 min after microinjection and lasted at least 90 min. In those rats treated with ZD7288 (100 nmol), the contents of glutamate, aspartate, glycine and GABA decreased significantly as compared to those of saline control (all P < 0.01, except P < 0.05 for that of glycine). A similar decrease in the contents of amino acids was observed when the rats were microinjected with CsCl (5 micromol). CONCLUSION; ZD7288 could obviously inhibit synaptic transmission in the pathway from PP fibers to CA3 region in rat hippocampus, and this action of ZD7288 may be associated with altered contents of amino acids.

Amino Acids ; metabolism ; Animals ; Cesium ; pharmacology ; Chlorides ; pharmacology ; Dose-Response Relationship, Drug ; Evoked Potentials ; Hippocampus ; metabolism ; physiology ; Male ; Microinjections ; Perforant Pathway ; physiology ; Pyrimidines ; administration & dosage ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Synaptic Transmission ; drug effects

OBJECTIVETo analyze the intermediate-term results associated with the use of Zweymtiller hip system.

METHODSReview the 116 cases (142 hips) who were treated with total hip replacement from 1996 to 2002 by a single surgeon using cementless Zweymüller hip systems.

RESULTSSixty-one cases (77 hips) were followed up, 50 cases (64 hips) were evaluated both clinically and radiographically while 5 cases (6 hips) and 6 cases (7 hips) were only evaluated clinically and radiographically respectively. The average follow-up period was 7.3 years (range 5 to 11 years). The mean preoperative Harris Hip Score was 46 while the mean postoperative Harris Hip Score was 93. Distal cortical hypertrophy and medullary sclerosis were observed in 30 hips (42.3%) and 33 hips (46.5%) respectively. Heterotopic ossification arose in 45 hips (63.4%). Radiolucent lines occurred in 27 stems (38.0%) but in no cups. Radiolucent lines were mostly observed in Gruen zones 1. Osteolysis occurred in 7 cups (9.9%) and 18 stems (25.4%). Osteolysis was mostly observed in Delee Zone 3 and Gruen zone 7. In the distal Gruen zones 3, 4 and 5, no radiolucent line or osteolysis was observed. No hips had been revised, 3 cups needed revision surgery because of aseptic loosening.

CONCLUSIONThe 5-11 years follow-up results are satisfactory, but osteolysis is common.

Adolescent ; Adult ; Aged ; Arthroplasty, Replacement, Hip ; Female ; Follow-Up Studies ; Hip Prosthesis ; Humans ; Male ; Middle Aged ; Treatment Outcome ; Young Adult

OBJECTIVETo investigate the effect of omega-3 polyunsaturated fatty acids(omega-3PUFAs) on the apoptosis of human gastric cancer cell line SGC-7901 and to explore the potential mechanisms.

METHODSCells were treated with eicosapentaenoic acid (20:5 omega-3,EPA) or docosahexaenoic acid (22:6 omega-3, DHA) at concentrations of 10, 20 and 40 microg/ml. Cell growth and apoptosis were analyzed with MTT assay, cell morphology, DNA electrophoresis and flow cytometry. Mitochondrial membrane potential ( triangle right psi mt) was measured by fluorescent probe rhodamine 123. The distribution of cytochrome C in mitochondria and cytosol was determined by enzyme-linked immunoadsorbent assay. The composition of mitochondrial membrane phospholipid(MMP)was examined by gas chromatography.

RESULTSBoth EPA and DHA markedly inhibited the SGC-7901 cell growth and induced apoptosis in a time- and dose-dependent manner. After incubation of the cells with 40 microg/ml EPA or DHA for 24 hours, the level of Deltapsimt siginificantly decreased (P<0.001), and cytochrome C largely released into cytosol from mitochondria. The proportions of EPA and DHA in MMP rapidly elevated while that of arachidonic acid sharply decreased.

CONCLUSIONSomega-3PUFAs inhibit the growth of gastric cancer cells through promoting apoptosis. Compositional and functional alterations in mitochondrial membrane may be an important initiator of apoptosis induced by omega-3PUFAs.

Apoptosis ; drug effects ; Cell Line, Tumor ; Cytochromes c ; metabolism ; Fatty Acids, Omega-3 ; pharmacology ; Humans ; Membrane Potential, Mitochondrial ; Mitochondria ; metabolism ; pathology ; Stomach Neoplasms ; metabolism

OBJECTIVETo observe the changes in pulmonary artery protein kinase C (PKC) activity in rats with chronic inflammatory pulmonary hypertension (PHT).

METHODSChronic inflammatory PHT was induced in rats with monocrotaline. The PKC activities in the rat pulmonary arteries were measured by radioactive assay during the development of PHT.

RESULTSWith the development of chronic inflammatory PHT, the total and cytosolic fractions of PKC activity in PHT rat pulmonary arteries increased initially with subsequent decrease (Plt;0.05), but the membranous fraction of PKC activity and the membrane-to-cytosol PKC activity ratio increased continuously (P<0.05).

CONCLUSIONThe up-regulation of PKC activity and the translocation of PKC might be associated with the development of chronic inflammatory PHT in rats.

Animals ; Chronic Disease ; Hypertension, Pulmonary ; chemically induced ; enzymology ; Inflammation ; chemically induced ; enzymology ; Male ; Monocrotaline ; Protein Kinase C ; metabolism ; Pulmonary Artery ; enzymology ; Rats ; Rats, Wistar

China ; epidemiology ; Disabled Persons ; Humans ; Oral Health ; Stomatognathic Diseases ; epidemiology