The main purpose of this study is to observe and analyze the characteristics and the clinical significance of long-term echocardiogram data in patients after mechanical aortic valve replacement operation. Fifty-five cases were recruited over 5 years after mechanical aortic valve replacement operation, with complete echocardiogram examination profiles. The 55 subjects were divided into predominate aortic stenosis group and predominate aortic regurgitation group, based on preoperative examinations. And another way of division was also carried out that according to the effective orifice area index (EOAI), the subjects were divided into three groups, i. e. , severe prosthesis-patient mismatch (PPM) group, moderate PPM group, and non PPM group. Characteristics of long-term echocardiogram data of the subjects were analyzed. Patients with aortic stenosis showed significantly decreased thickness of intraventricular septum and left ventricular posterior wall about half a year after operation (P < 0.05). Half a year after operation, patients with aortic regurgitation showed decreased left ventricular internal dimension diastole and left ventricular internal dimension systole, and increased ejection fraction (P < 0.05). Differences in mean aortic valve pressure gradient, forward blood flow across the aortic valves, and ejection fraction were not significant among those with severe PPM, moderate PPM, and non PPM groups (P > 0.05). Number of cases of ascending aorta dimension increased as time goes on and pathogenesis of other valve diseases. A conclusion could be drawn that the heart function of patients with aortic valve disease could be improved after mechanical aortic valve replacement operation, but pathologies in other valves and ascending aorta might be increased, and therefore periodical postoperative echocardiogram evaluation with long-term pharmaceutical therapy could be necessary.
Aortic Valve Stenosis ; surgery ; Echocardiography ; Heart Valve Prosthesis ; Heart Valve Prosthesis Implantation ; Heart Ventricles ; anatomy & histology ; Humans ; Postoperative Period ; Systole ; Treatment Outcome

Objective To study the factors effecting on flow cytometric sperm chromatin structure assay.Methods The SCSA explores the metachromatic properties of acridine orange (AO) and flow cytometry to monitor the susceptibility of sperm chromatin DNA to acid induced denaturation in situ because of the low pH treatment. Results COMP?t, ?t, SD?t value were different upon on the storage methods (①sperm was preserved in 4℃, ②sperm was cryopreservated after dilution ③sperm was cryopreservated). Results show that the second method above made the least artificial injury to sperm DNA. It did not affect the results if the samples were quickly thawed in a 37℃ water bath and detected immediately and the detect current velocity was lower than 300 cell/sec. The intra -CV was 7 28% and the internal CV was 8 92%. Mean and standard deviations of COMP?t were 8 7?11 0% in 511 healthy men. Because data present right skew distribution, the reference range of COMP?t is

A cold-adapted (ca), temperature sensitive (ts), live attenuated influenza B virus strain B/Ann Arbor/1/66 was chosen for influenza virus rescue research, in which six internal gene segments, PB1, PB2, PA, NP, M, NS, were fully synthesized and nine amino acid substitutions were artificially alter by human intervention. The resultant B/Ann Arbor/1/66 plasmids were named as pAB121-PB1, pAB122-PB2, pAB123-PA, pAB124-HA, pAB125-NP, pAB126-NA, pAB127-M and pAB128-NS, respectively. A recombinant influenza A virus was previously generated entirely from cloned cDNA. An infectious recombinant influenza B virus was generated here, and designated as rMDV-B, by plasmid-based reverse genetics. The rMDV-B virus contained HA and NA genes from an epidemic influenza B vires strain B/Malaysia/2506/2004 in the background of internal genes derived from influenza B virus strain B/Ann Arbor/1/66. HA titer of rMDV-B in MDCK cells and embryonated chicken eggs ranged from 1 : 64 to 1 : 512. The results may allow an effective live influenza B vaccine to be produced from a single master strain, providing a model for the design of future live human influenza vaccines.

OBJECTIVETo establish the technical specifications of transbronchoscope whole lung lavage (TBWLL) and to compare the clinical efficacy between TBWLL and bronchoalveolar lavage (BAL) or whole lung lavage (WLL).

METHODSA total of 133 patients with pneumoconiosis admitted to Hunan Prevention and Treatment Institute for Occupational Diseases from 2009 to 2014 were divided into TBWLL group (n=43), BAL group (n=45), and WLL group (n=45). Patients in the TBWLL group received conventional BAL of both lungs under a fiber bronchoscope, as well as sedation and anesthesia; lavage was performed twice in each course. TBWLL was compared with the BAL and WLL in terms of lavage volume. The clinical symptoms, pulmonary function, and blood gas before and after treatment and the safety were evaluated.

RESULTSThe TBWLL group had significantly relieved cough and limitation of activity after lavage (P<0.05). Compared with the BAL group, the TBWLL group had significantly increased single lavage volumes and total lavage volume and a significantly shortened length of hospital stay (P<0.05). The three groups showed no significant short-term changes in clinical symptoms and pulmonary function after lavage. The TBWLL and WLL groups had a significantly lower incidence of postoperative complications than the BAL group (P<0.05).

CONCLUSIONTBWLL has good clinical efficacy, with the advantages of BAL and WLL, and is highly feasible, safe, and effective.

Bronchoalveolar Lavage ; Bronchoscopes ; Humans ; Lung ; physiopathology ; Pneumoconiosis ; therapy ; Therapeutic Irrigation ; methods