[Objective]To study the changes of biomechanical efficiency of absorbable balloon vertebraplasty associated with pedicle screw system for treatment of thoracolumbar fracture.[Method]Six fresh adult thoracolumbar specimens were harvested and 10 segmental specimens(T_(11)~L_1、 L_(2~4)、 L_(1~3)) were processed.After burst fracture created by free-drop test,the specimens were braced and reduced by APF pedicle screw,then absorbable balloon were placed through the traumatic vertebral pedicle and were infused with autosolidification calcium phosphate cement to process vertebroplasty.The stiffness in middle vertebrae were measured under flexion,extension,lateral flexion and torsion stress before fracture and after absorbable balloon vertebroplasty respectively.[Result]The crushing strength in traumatic vertebrae after vertebroplasty with absorbable saeculi increased showed 8% under flexion,15% under extension and 9.8% under lateral flexion,but with significant increasing under extension(P0.05).[Conclusion](1)absorbable balloon vertebraplasty associated with pedicle screw system conduces to the reconstruction of traumatic vertebrae,and making postoperative spinal biomechanical characteristics approach the level before fracture;(2)Vertebroplasty with absorbable sacculus for treatment of thoracolumbar burst fracture based on the premise that avoid the potential danger induced by leakage of bone cement,and can reestablish intact corporeal structure of traumatic vertebrae and restore their height essentially,so that spinal physiologic curve can be gained to restore and maintain,tardive lumbodorsal pain and spinal cord injury and nerve injury caused by secondary kyphosis can be prevented,this can fundamentally solve complications left over by thoracolumbar burst fracture treated using pedicle screw system simply.The new method prorides a rational method for clinical treatment of thoracolumbar burst fractures.

OBJECTIVETo analyze causes of missed diagnosis of hiding post-malleolar fractures in treating ankle joint fractures of pronation-external rotation type according to Lauge-Hansen classification and assess its medium-term outcomes.

METHODSAmong 103 patients with ankle joint fracture of pronation-external rotation type treated from March 2002 to June 2010,9 patients were missed diagnosis,including 6 males and 3 females,with a mean age of 35.2 years old (ranged, 18 to 55 years old) . Four patients were diagnosed during operation, 2 patients were diagnosed 2 or 3 days after first surgery and 3 patients came from other hospital. All the patients were treated remedially with lag screws and lock plates internal fixation. After operation,ankle joint function was evaluated according to American Orthopaedic Foot and Ankle Society (AOFAS).

RESULTSAll the 9 patients were followed up, and the duration ranged from 14 to 30 months (averaged, 17 months). No incision infection was found, and all incision healed at the first stage. At the latest follow-up, AOFAS was 83.0 +/- 4.4, the score of 4 patients diagnosed during operation was 85.0 +/- 2.9, and the score of 5 patients treated by secondary operation was 81.0 +/- 5.3. All the patients got fracture union observed by X-ray at a mean time of 2.2 months after operation. There were no complications such as internal fixation loosing, broken and vascular or nerve injuries.

CONCLUSIONAnkle joint fracture of pronation-external rotation type may be combined with hiding post-malleolar fractures. So to patients with ankle joint fracture of pronation-external rotation type, lateral X-ray should be read carefully, and if necessary, CT or MRI examination should be performed. If adding lateral X-ray examination after reduction of exterior and interior ankle joint fixation, the missed diagnosis may be avoided.

Adolescent ; Adult ; Ankle Fractures ; False Negative Reactions ; Female ; Fractures, Bone ; diagnosis ; diagnostic imaging ; physiopathology ; surgery ; Humans ; Male ; Middle Aged ; Pronation ; Rotation ; Tomography, X-Ray Computed ; Treatment Outcome ; Young Adult

The AC impedance of human hepatoma SMMC-7721 cells were measured in our laboratory by Agilent 4294A impedance analyzer in the frequency range of 0.01-100 MHz. And then the effect of hematocrit on electrical impedance characteristics of hepatoma cells was observed by electrical impedance spectroscopy, Bode diagram, Nyquist diagram and Nichols diagram. The results showed that firstly, there is a frequency dependence, i.e., the increment of real part and the imaginary part of complex electrical impedance (δZ', δZ"), the increment of the amplitude modulus of complex electrical impedance (δ[Z *]) and phase angle (δθ) were all changed with the increasing frequency. Secondly, it showed cell volume fraction (CVF) dependence, i. e. , the increment of low-frequency limit (δZ'0, δ[Z*] 0), peak (δZ"(p), δθ(p)), area and radius (Nyquist diagram, Nichols diagram) were all increased along with the electric field frequency. Thirdly, there was the presence of two characteristic frequencies: the first characteristic frequency (f(c1)) and the second characteristic frequency (f(c2)), which were originated respectively in the polarization effects of two interfaces that the cell membrane and extracellular fluid, cell membrane and cytoplasm. A conclusion can be drawn that the electrical impedance spectroscopy is able to be used to observe the electrical characteristics of human hepatoma cells, and therefore this method can be used to investigate the electrophysiological mechanisms of liver cancer cells, and provide research tools and observation parameters, and it also has important theoretical value and potential applications for screening anticancer drugs.
Carcinoma, Hepatocellular ; Cell Line, Tumor ; Cell Membrane ; Cytoplasm ; Electric Impedance ; Electrophysiological Phenomena ; Humans ; Liver Neoplasms ; Membrane Potentials

Dig-DNA probes of hemorrhagic fever with renal syndrome vinus M S gene fragment were prepared by PCR and random primer labeling, The probes had speciality to HFRSV-RNA and could detect 10pg RNA by RNA-DNA dot-blot hybridization. The results of hybridization showed that positive reactions were found in 5, 10 chigger mites groups from antigenic positive rats, 10 mites group from antigenic negative rats, 10, 50 free chigger mites, and hung of antigenic positive mice 100mg, 500mg. But negative reation in 5 mites group from antigenic negative mice.

Objective To evaluate the correlation between the elastic modulus of prostate and the degree of bladder outlet obstruction (BOO) in benign prostatic hyperplasia (BPH) patients in order to build a new non-invasive diagnostic indicator for BOO.Methods From november 2011 to November 2012,a total of 34 BPH patients were enrolled in this prospective study.Clinical information of the patients including age,international prostate symptom score (IPSS) and quality of life (QOL) were collected.The morphological features of prostate including total prostate volume,transitaion zone volume and transition zone index were detected by transrectal ultrasound (US),and prostate elastic modulus was detected using shear wave sonoelastograhy.After US examination,urodynamic study was performed by the urologist and pressure-flow curves were used to determine the diagnosis and the degree of bladder outlet obstruction.The correlation of prostate elastic modulus and other features including clinical information,morphological features and urodynamic features with the degree of bladder outlet obstruction were evaluated.ROC curves were evaluated.The feature with the best diagnostic performance was obtained,the diagnostic values of which were calculated.Results 9 patients had no BOO,with the average prostate elastic modulus of (27.3±5.0) kPa; 12 patients had mild to moderate BOO,with the average prostate elastic modulus of (30.7±2.8) kPa; 13 patients had severe BOO,with the average prostate elastic modulus of (34.7±2.4) kPa.The prostate elastic modulus had higher correlation coefficient with the degree of bladder outlet obstruction than the other features (r =0.754,P=0.000).It also had the highest AUC of 0.853 (95％CI 0.720-0.986).At a cutoffof 31.65 kPa,the sensitivity,specificity and accuracy of the prostate elastic modulus for the diagnosis of BOO were 72％,90％and 81％ respectively.Conclusion The prostate elastic modulus is highly correlated with the degree of bladder outlet obstruction,which might serve as a novel,promising indicator to evaluate BOO in BPH patients.

Child ; Humans ; Hyperplasia ; Male ; Panniculitis ; diagnosis ; Skin Diseases ; diagnosis ; T-Lymphocytes ; pathology

OBJECTIVE:To scientifically establish the variety scope of expensive drugs and to reduce the stock level to a maximum degree under the premise of supply security. METHODS: The variety scope of expensive drugs was established by modified ABC (activity-based costing) analytical method,and the management on expensive drugs was carried out by fixed-quantity system (FQS) together with fixed-interval system (FIS). RESULTS: The practice of the optimized management effectively reduced the stock quantity of expensive drugs,increased the amount of money of 75 stocked drugs to 2.473 7 million yuan from 3.935 7 million yuan;the turnover rate rose from 238.36% to 461.86%,and the turnover days were decreased from 13.03 days to 8.29 days. CONCLUSION: Computer management in combination with the modified ABC analytical method together with FQS and FIS management led to an effective and accurate inventory management of expensive drugs,which then resulted in a speedy turnover rate,decreased fund occupying and lowered drug cost.

Objective To evaluate and eliminate the potential bias between data obtained from dry and liquid biochemical assays,making data obtained by different assays matchable.Methods Bias estimation was performed based on document EP9-A2.Simple data comparison and methodology validation were performed after the experiment methods were modified with the estimated correction factors and interception.All the collected data were analyzed by EXCEL2007 software.Results The predicted bias of 4 of the 10 compared items exceeded their corresponding acceptable bias.After being adjusted by the coefficient and interception obtained from linear regression analysis,the four bias was improved and was within the acceptable range.The results of simple data comparison further confirmed this comparability.Conclusion Based on EP9-A2,we have established a protocol to obtain a consistency of data from different biochemical analyzers,which makes it possible that the detection results of the same patient from different detection systems can be used directly.The protocol has been approved by the experts during the medicinal laboratory accreditation of ISO15189.

To explore the measures of nursing management in the treatment of large number of infants with urinary calculi. The nursing management measures included launching the preparedness and response project for sudden public health events, formulating scientific and standardized nursing management system,optimizing work flow,strengthening nurse training,focusing on the details in nursing management,implementing disinfection and isolation system seriously,and paying close attention to health education for the parents of minority infants. Scientific nursing management can ensure the treatment effectiveness and nursing safety for the infants with urinary calculi.

Stroke is a common neurological diseases with high morbidity,high mortality and high morbidity characteristics,which brings great suffer and economic burden to the patients and families,and has become an important research topic in contemporary medical profession.Treatment directly affects the prognosis of patients with cerebral infarction,and thus it is very important to find the most effective treatments and methods.Currently,thrombolytic therapy in acute cerebral infarction have carried out a large number of experimental studies,and achieved good results.This paper reviewed the thrombolytic therapy in acute cerebral infarctionincluding the time window,methods and drugs of thrombolysis,and the influencing factors of outcomes were also summarized and discussed.