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Objective To observe the 12-lead ECG ( electrocardiogram ) characteristics of Japanese rabbits , and provide basic ECG data for cardiovascular disease research .Methods The 12-lead ECG and X-rays of 55 male Japanese rabbits were recorded in supine position after intraperitoneal injection of 20% urethane.Results ECG:① The 12-lead ECG characteristics of male Japanese rabbits were similar to humans .The rabbit heart rate was 265.5 ±36.8 beats/min, faster than that of humans .No arrhythmia was found in all the 55 rabbits.② The supine position average ECG axis was between 19 °to 250 °, varying a lot .③P wave:The shape of P wave was blunt round or a little bit sharp .P waves were all in accordance with the sinus P wave rules , which were more obvious in lead II , aVF and all chest leads .④ The PR interval was 0.063 ±0.007 s.⑤The QRS duration was 0.040 ±0.005 s.The main waves were mostly upward in leadsⅡ,Ⅲ, and aVF .The same as humans , the R/S ratios were increased by degrees in chest leads .⑥The ST segment was short, and was located in the equipotential line .⑦ The shapes of T wave were mostly round , partly had twin peaks .T waves were more obvious in leads Ⅱ,Ⅲ, aVR, and AVF and chest leads .⑧The QT interval was 0.142 ±0.015 s, and QTc was 0.306 ±0.034 s.In the X-rays, most heart shadows were in the center and right chest .Conclusions The normal values of 12-lead ECG characteristics of Japanese rabbits are obtained in this study , which are of certain application value in experimental studies of cardiovascular diseases .
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OBJECTIVE@#To investigate the clinical application value of cone-beam CT (CBCT) online correcting technology in volume modulated radiation therapy (VMRT) for nasopharyngeal carcinoma (NPC).@*METHOD@#Fifty NPC patients applying head neck and shoulder thermoplastic body membrane fixing device were eligible for treatment VMRT, these patients would accept a couple of CBCT scanning by on board imager (OBI) in a fixed time each week after initial setup and after online correcting during the first three week for radiotherapy, CBCT images and DRR images constructed by CT simulation were carried out registration,which could calculate the setup errors of initial setup and after online correcting.@*RESULT@#Fifty patients were accepted 150 scanning after initial setup and 150 scanning after online correcting respectively, the errors after initial setup were (-1.24 ± 1.25)mm in X direction, (1.19 ± 1.85)mm in Y direction, (1.49 ± 1.70) mm in Z direction. The setup errors after online correcting were (-0.13 ± 0.29)mm in X direction, (0.10 ± 0.47)mm in Y direction, (0.17 ± 0.36)mm in Z direction. The setup errors after online correcting were significantly lower than the errors after initial setup in X direction (P < 0.05), Y direction (P < 0.05), Z direction(P < 0.05). The M(PTV) value after online correcting were 0.46 mm, 0.53 mm and 0.59 mm in X, Y and Z directions respectively.@*CONCLUSION@#The use of CBCT online correcting technology can significantly reduce the setup errors of VMRT for NPC and improve the treatment effect.
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Humans , Carcinoma , Cone-Beam Computed Tomography , Nasopharyngeal Carcinoma , Nasopharyngeal Neoplasms , Radiotherapy , Radiotherapy Planning, Computer-Assisted , Radiotherapy, Intensity-ModulatedABSTRACT
Objective To analyze the pathogen distribution and drug resistance in the patients with urinary system infection in our hospital so as to provide the basis for prevention and treatment of urinary system infection .Methods 259 strains of pathogenic bacteria cultured and isolated from the midstream urine were performed the bacteriologic identification and the drug susceptibility testing ,Escherichia coli and Klebsiella pneumoniae were performed the extend‐spectrum β‐lactamase (ESBLs) producing testing . Results Among 259 strains of bacteria ,187 strains 72 .2% (187/259) were Gram negative stains ,43 strains 16 .6% (43/259) were Gram positive stains and 29 strains 11 .20% (29/259) were fungi .Gram negative stains were dominated by Escherichia coli (139 strains) and Klebsiella pneumoniae (22 strains) .The detection rates of ESBLs‐producing Escherichia Coli and Klebsiella pneumoni‐ae were 55 .4% (77/139) and 45 .4% (10/22) .The drug susceptibility testing results showed that Gram negative stains were sus‐ceptible to both imipenem and meropenem (100% ) and Gram positive stains were susceptible to vancomycin ,teicoplanin and linezol‐id (100% ) .Conclusion Gram negative bacilli are the main infectious pathogens in urinary tract infection and Escherichia coli is the most common pathogen .No vancomycin‐resistant Gram positive cocci is found .Rationally selecting antibacterial drugs according to the drug susceptibility testing results has great significance in the therapy of urinary tract infection and the control of drug‐resistant bacterial strains .
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Objective To study the postpartum pelvic floor rehabilitation on the improvement of pelvic floor electrical physiological indexes and the prevention of female pelvic floor dysfunction in China. Methods A multicenter prospective randomized controlled study was carried out. From October 2011, postpartum women in five provinces were randomly assigned into treatment group and control group. The women in treatment group received electrical stimulation and biofeedback treatment. The women in control group performed pelvic floor muscle exercise at home. When 6 months and 12 months after delivery, comparing two groups of patients with pelvic floor electrical physiological indexes and pelvic organ prolapse quantitation measurements (POP-Q), to evaluate the effect of postpartum pelvic floor rehabilitation on the prevention of pelvic floor dysfunction. Pelvic floor impact questionnaire short form (PFIQ-7) and pelvic organ prolapse/incontinence sexual questionnaire-12 (PISQ-12) were used to evaluate the influence on quality of life and sexual life. Results Until June 2013, 324 women were participated, 124 in control group, 200 in treatment group. According to the baseline results, there was statistical significance in the results of pelvic floor electrical physiological indexes between the treatment and control groups in postpartum 6 months and 12 months; the proportion above level Ⅲ of type Ⅰ and type Ⅱ muscle fibers strength in the treatment group, it was from 41.5% (83/200) and 40.5% (81/200) to 76.3% (145/190) and 79.5% (151/190) in postpartum 6 weeks and postpartum 6 months, increased to 80.6%(58/72) and 80.6%(58/72) in postpartum 12 months, improved significantly comparing with the control group (P0.05). There was no significant difference in the questionnaires in quality of life and quality of sexual life (P>0.05). Conclusion Neuromuscular electrical stimulation and biofeedback therapy in the early postpartum period could obviously improve pelvic floor electrical physiological indexes, and is beneficial to prevent the pelvic floor dysfunction.
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Objective To explore the clinical value of procalcitonin (PCT ) and blood culture in the united diagnosis of early blood stream infection .Methods The blood specimens of 625 patients were collected ,the serum level of PCT was detected by EL‐FA ,and the blood culture was accessed at the same time .23 cases of blood culture positive samples were received continuous detec‐tion of PCT ,and the results were analyzed .Results Positive rate of PCT was 41 .01% (0 .05 -2 .58 μg/L)in patients with blood culture negative results (negative group) ,and that in patients with blood culture positive results (positive group) was 80 .77%(0 .05-200 .00 μg/L) .The positive rate of PCT in positive group was significantly higher than negative group (χ2 =65 .12 ,P<0 .01) .Positive rates of PCT in patients with infection of Candida tropicalis ,kinds of bacteria ,Gram‐negative bacilli and Gram‐posi‐tive cocci were 100 .00% ,100 .00% ,92 .11% and 56 .81% ,respectively .Continuous detection of PCT in 23 patients with blood cul‐ture positive results showed that patients with gradually decreased PCT level suggested a good prognosis ,and patients whose PCT levels were higher than 10 μg/L and were maintained at high levels had poor prognosis .Conclusion Simultaneously blood culture and PCT detection was important to the early diagnosis and treatment of blood stream infection .
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Objective: To explore myocardial protection effect of artificial subhibernation therapy on rabbits with acute myocardial infarction (AMI) and its possible mechanism. Methods: A total of 24 rabbits were randomly and equally divided into sham operation group, AMI control group and AMI subhibernation group. Changes of their body temperature, heart rate and respiratory frequency were observed. Serum concentration of creatine kinase isoenzyme (CK-MB) was measured by immunosuppression method, and plasma concentration of norepinephrine (NE) was measured by high performance liquid chromatography-electrochemical method. Percentage of myocardial infarct area in left ventricular area (I/LV) and apoptosis index (AI) were compared between two AMI groups. Results: Compared with control group 4 h after establishment of AMI model, there were significant decrease in body temperature [(37.333±0.427)℃ vs. (34.988±0.488)℃], I/LV [(19.281±1.687)% vs. (16.263±2.275)%] and AI [(36.636±1.671)% vs. (34.521±1.356)%], and concentration of CK-MB [(759.863±64.111)U/L vs. (560.225±65.837)U/L] and NE [(200.475±43.581) ng/ml vs. (143.813±43.383) ng/ml] in subhibernation group, P<0.05,or <0.01, but there were no significant changes in heart rate and respiratory frequency between two groups. Conclusion: Artificial subhibernation therapy possesses significant myocardial protection effect on rabbits with acute myocardial infarction through reducing stress response, inducing low temperature and inhibiting cell apoptosis etc.
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Objective To investigate the incidence and correlative factors of metabolic syndrome (MS) in patients with systemic lupus erythematosus (SLE).Methods A total of 116 SLE patients and 115 controls were enrolled into the study.The incidence of MS,SLE disease activity index(SLEDAI) of patients with SLE combined with MS (MS-SLE) and patients without MS (n-MS-SLE),lupus characteristics,cumulative glucocorticoids,administration dose of glucocorticoids and hydroxychloroquine were compared between SLE group and the control group.Results The incidence of MS of SLE group was obviously higher than that of the control ( 34.48％ vs 14.78％,P ＜ 0.05 ).The ratios of patients with lower HDL-C,higher TG and higher blood pressure in SLE group ( 50.86％,56.03％,46.55％ ) were higher than those in the controls ( 34.78％,16.52％,20.00％,all P ＜ 0.05 ).MS-SLE group had significantly higher mean waist circumference,BMI,systolic blood pressure and diastolic blood pressure and lower HDL-C than n-MS-SLE group (all P ＜0.05 ).No significant difference was found regarding duration of disease,renal involvement,ESR,C-reactive protein,high-sensitivity C-reactive protein,SLEDAI,cumulative and current glucocorticoids use in MS-SLE group and n-MS-SLE group.The ratio of patients taking hydroxychloroquine in n-MS-SLE group was higher than that of MS-SLE group (46.05％ vs 15.00％,P＜0.05).Conclusions Patients with SLE has a higher incidence rate of MS.Hydroxychloroquine may reduce their MS incidence.
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Electrocardiogram (ECG) is a convenient, economic, and non-invasive detecting tool in myocardial ischemia (MI). Its clinical appearance is mainly exhibited by ST-T complex change. MI events are usually instantaneous and asymptomatic in some cases, which cannot be forecasted to have a precautionary measure in time by doctors. The automatic detection of MI by computer and a cued warning of danger in real time play an important role in diagnosing heart disease. With the help of the medical staff, some quantitative approbatory indicators, such as ST-segment deviation, the amplitude of T-wave peak and the rate of ST and heart rate (HR), were combined to judge MI using fuzzy reasoning. After MIT-BIH database and the long-term ST database (LTST) verification, sensitivity and positive predictive values reached 75% and 78% respectively, and specificity and negative predictive values were 85% and 87% respectively. In addition, the proposed method was close to human way of thinking and understanding, and easy to apply in clinical detection and engineering fields.
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Humans , Electrocardiography , Fuzzy Logic , Myocardial Ischemia , Diagnosis , Signal Processing, Computer-AssistedABSTRACT
Objective:To screen the early biomarkers associated with lung carcinoma by using proteomic method. Methods:The proteins of early lung squamous cell carcinoma tissues and adjacent normal tissues were separated by two-dimensional gel electrophoresis (2-DE) and differentially expressed proteins were screened by mass spectrometry (MS). The differential expressions of part proteins were verified by immunohistochemical method. Results:The proteomic profiles of lung squamous cell carcinoma and the adjacent normal tissues were established and the average matched protein spots in the two group were 626 and 602, respectively. Ten protein spots with higher expression in lung squamous cell carcinoma tissues were identified as Annexin 1(Anx-A1),heat shock proteins (HSP27), etc. The proteins were mainly related with cell cycle and signal transduction. The results of immunohistochemistry showed that the positive expression rates of Anx-A1 and HSP27 in lung squamous cell carcinoma tissues were significantly increased (P<0.05). Conclusion:Proteomic technology was an effective method for preliminary identification of the proteins associated with early lung carcinoma. The identified proteins laid a solid foundation for further screening the molecular markers for early diagnosis and treatment of lung cancer.