Valvular disease is a commonly seen heart disorder,valve replacement is an effective approach to treat valve disorders.Both the mechanic valves and bioprosthesis used now have their own defects,making it important for the cardio surgery field to develop some kind of ideal valves.With the development of tissue engineering techniques,the tissue engineering valves are thought to have great potential and bright clinical future,and now it has become a hot point in cardiac surgery.This article is to evaluate the frame materials,resource of tissue cells and implantation, in vitro pre adaptation testing and in vivo animal experiment results,and the existing problems are pointed out in the present study.

The deepening of our understanding on the cardiac electrophysiology mechanism and the progress on cell transplantation technique have expanded our view in treating various kinds of cardiac diseases. Over the past few years literatures have reported many kinds of cell transplantation techniques for treating various types of bradyarrhythmias, such as complete heart block and sinoatrial node dysfunction, and impressive achievements have been made by far. This review discusses the advantages and flaws of the existing strategies and the future of biological pacemakers.

Objective To describe the mastery of knowledge about antihypertensive drugs of clinical nurses in one tertiary comprehensive hospital of Beijing.Methods Purposive sampling was used to recruit 195 clinical nurses who were working in one tertiary comprehensive hospital in Beijing.The demographic questionnaire,knowledge of antihypertensive drugs questionnaire were filled.Results The score of knowledge of antihypertensive drugs Questionnaire was (45.63 ± 3.79) points;different education,wishes to take part in hypertension related knowledge training had significant differences (t =2.007,2.049,P ＜ 0.05).Conclusion Knowledge of antihypertensive drugs of clinical nurses in Beijing was at medium level.Those who indicated that it was not matter whether to attend hypertension related knowledge training and had low level of education had more problems in knowledge of antihypertensive drugs.

Despite high coverage of vaccinations, incidence of pertussis (whooping cough) has been increasing throughout the world and large outbreaks were reported in several countries.Adolescents and adults with atypical pertussis symptoms have become the main sources of infants′ pertussis.Since clinicians are lack of experience in making diagnosis based on atypical symptoms, laboratory methods are needed.The currently recommended laboratory methods include bacterial culture, PCR and serology ELISA.It is well known that sensitivity and specificity of the above-mentioned methods may vary depending on many factors such as status of vaccination, timing of specimen collection and onset of symptoms.Serology ELISA to measure specific anti-pertussis toxin IgG antibodies in serum has been proven to be one suitable method for the diagnosis of pertussis infection in adolescents and adults.In this review, we summarize the current status of methods used in China and other countries for the laboratory diagnosis of pertussis and discuss the clinical relevance of serology ELISA for pertussis diagnosis.

Objective To investigate the long-term morphologic and functional changes of the tricuspid valve after mitral valve replacement. Methods The tricuspid valve function was evaluated by Doppler echocardiography in 903 patients who underwent mitral valve replacement during recent 10 years. Tricuspid regurgitation and annular dilatation in various degrees were found in all patients preoperatively. 686 patients underwent Kay annuloplasty or DeVega annuloplasty, 106 patients underwent tricuspid ring annuloplasty, and 201 untreated. Results Among 201 patients who did not undergo tricuspid annuloplasty, severe tricuspid regurgitation developed in 46 during 2 to 3 years follow-up. One out of 16 patients who underwent tricuspid ring annuloplasty developed moderate tricuspid regurgitation 2 years after operation. Of 686 patients who underwent Kay annuloplasty or DeVega annuloplasty, 150 developed moderate or severe tricuspid regurgitation during 3~5 years after operation. Conclusion Tricuspid annular dilatation, right heart impairment and severe pulmonary hypertension are responsible for the development of late tricuspid regurgitation after mitral valve replacement. For the patient who underwent mitral valve replacement ,tricuspid annuloplasty should be performed when annular dilatation was found, even without tricuspid regurgitation and tricuspid ring annuloplasty should be performed in patient with severe tricuspid regurgitation and obvious tricuspid annular dilatation.

Objective: Establishment of information system can contribute to the integration of resources and process optimization of the hospital, so that it can reduce operating costs and improve service quality, work efficiency and the management level. It is helpful to realize the digital hospital and is the new trend of modern medical development. Methods: Information systems using C/S and B/S mode with full module function. The navigation is clear, flexible and easy to use;which have reserved for special interface data platform for easy to expand. Results:Through the implementation of information systems to solve a single asset management tools, please collar complex, information isolated, accounting information lag and other issues, to improve efficiency of hospital equipment and patient satisfaction guarantee, to achieve a transparent, integration, dynamic, precise management of hospital assets. Conclusion: The system realizes quality and safety control to the assets of whole process, specialization and informatization. The system adapts to the real service of hospital asset management, to meet the requirements of asset information management in the hospital.

Objective To study the interference of Huangyangning Injection in bacterial endotoxin test and to establish bacterial endotoxin test method for this specimen.Methods According to China Pharmacopoeia 2000,inhibition or en-hancement test for bacterial endoto xins test was carried out for Huangyangning Injection.Results l ∶150solution of Huangyangning Injection had no inte rference on the test.Conclusion Reliable data and result are obtained and bacterial endotoxin test method for Huangyangning Injection has been established.

Objective To investigate the effect of penehyclidine hydrochloride combined with low tidal volume ventilation on lung function in patients with lower abdominal operation.Methods Sixty elderly patients who underwent elective lower abdominal operation were divided into three groups by random digits table method:the conventional tidal volume group (group A),penehyclidine hydrochloride combined with conventional tidal volume group (group B) and penehyclidine hydrochloride combined with low tidal volume group (group C),20 cases in each group.The patients in group B and group C were given penehyclidine hydrochloride 0.01 mg/kg before induction of anesthesia.The patients in group A were given equal volume of saline.After induction of anesthesia and mechanical ventilation modes:the patients in group A and group B were given tidal volume 10 ml/kg,the patients in group C were given tidal volume 6 ml/kg.After mechanical ventilation in anesthetized (T1),1 h after anesthesia (T2),2 h after anesthesia (T3),8 h after anesthesia (T4),24 h after anesthesia (T5),the level of tumor necrosis factor alpha (TNF-α),interleukin-6 (IL-6),pH,arterial partial pressure of oxygen (PaO2),arterial partial pressure of carbon dioxide (PaCO2),the calculation of oxygenation index (PaO2/FiO2) were measured and compared.The pulmonary complications after operation 1 day were recorded.Results The level of TNF-α,IL-6 in three patients at T1 had no significant difference (P ＞ 0.05).The level of TNF-α,IL-6 at T2-5 in group C were significantly lower than those in group A and group B (P ＜ 0.05).Compared with group A and group B,the level of PaO2 and PaO2/FiO2 at T2-5 were increased in group C (P ＜ 0.05).None pulmonary complications were occurred in three groups.Conclusions Penehyclidine hydrochloride combined with low tidal volume ventilation may improve arterial oxygen in patients with lower abdominal operation,reduce the lung injury induced by mechanical ventilation,protective effect on lung function.

Metastasis-associated in colon cancer-1 (MACC1) is a recently discovered gene associated with colon cancer metastasis,there is significant relationship indicated from some studies between MACC1 and different malignant tumors.It may play an important role in the regulation of tumors metastasis.This article reviewed the expression and regulating function of MACC1 in different cancers including colorectal cancer,hepatic cancer,gastric cancer,lung cancer,ovarian cancer,breast cancer,and so on.It may offer clues to find a new target for target treatment of cancer metastasis.

Objective To evaluate the therapeutic efficacy of peritoneal dialysis(PD) for acute renal failure(ARF) subsequent to cardiac surgical procedures in adults.Method Clinical data of 125 consecutive adult patients,admitted from Feb.1997 to Nov.2007,with ARF subsequent to cardiac surgery and undergone PD,were analyzed retrospectively.The levels of creatinine(Cr),blood urea nitrogen(BUN),albumin and kalium ion([K+]) were compared before and after PD.Results Of 8451 consecutive adult patients undergone operations on heart,358 cases(4.2%) experienced ARF,and 125 cases(1.5%) required PD.In 117 patients performed PD,[K+] declined to normal level within one day,BUN and Cr were 10.5?3.6mmol/L and 129.3?41.6?mol/L at the third day after PD respectively,significantly lower than those before PD(P