In this paper, the common errors in medical devices test reports are classified and analyzed. And then the main 11 influence factors for these inspection report errors are summarized. The hierarchy model was also developed and verified by presentation data using MATLAB. The feasibility of comprehensive weights quantitative comparison has been analyzed by using the analytic hierarchy process. In the end, this paper porspects the further research direction.
Equipment Failure Analysis ; Equipment and Supplies ; standards ; Models, Theoretical

Compared with the recycle of post-consumer medical equipments in medical institutions, the treatment of post-consumer home medical equipments (HME) should be consummated in the field of academic research, policy and regulatory plus corresponding supporting industries. The HME industry situation and its classification, main components and properties are reviewed in this paper. The merits and demerits of various pollution control techniques in the recycle of post-consumer medical equipments are analysed. For instance, the source control techniques to improve the property of raw materials, the end treatment technique to recycle the HME and regenerate energy are also discussed. Further, the development prospect of pollution control technique in the recycle of HME and the challenges must face up to are also probed.
Environmental Pollution ; prevention & control ; Equipment and Supplies ; standards ; Industry

Evaluation of medical assistance capability plays a significant role in improving medical assistance capability and accomplishing a diverse array of military tasks.Based on gray theory and fuzzy mathematics,we put forward a new evaluation model for disaster medical assistance capability,integrating the AHP,the gray cluster analysis and fuzzy evaluation.This model not only reflects the ambiguity of medical assistance capability evaluation but also makes full use of the information,which avoids the flaws caused by single method of fuzzy mathematics.It provides a new way to evaluate disaster medical assistance capability comprehensively and systematically.

OBJECTIVETo explore the relationship between salivary proteome and dental caries and to promote the biomarker studies of dental caries susceptibility by comparing the salivary proteome of caries-active children and caries-free children with electrospray ionization ion-trap tandem mass spectrometry (ESI-MS/MS).

METHODSTen caries-active children and ten caries-free children were sampled. The salivary proteome of the two groups was studied, and the differential protein between the two groups was analyzed by ESI-MS/MS after sodium dodecyl sulfate polyacrylamide gel electrophoresis, filter-aided sample preparation, and liquid chromatography.

RESULTSThe concentration of salivary protein was higher in the caries-active group than in the caries-free group. The polypeptide counts of thecaries-active and caries-free groups were 602 and 481, which belonged to 286 and 227 proteins, respectively. The differential polypeptide count of the two groups was 361, and the differential protein count was 118. The detected proteins included matrix metalloproteinase-9 (MMP9), mucin-7 (MUC7), lactotransferrin (LTF), carbonic anhydrase 6 (CA6), azurocidin (AZU), and cold agglutinin.

CONCLUSIONThe total salivary protein was higher in the caries-active group than in the caries-free group. The preliminary detection of differential proteins (MMP9, MUC7, LTF, CA6, AZU, and cold agglutinin) may lay some foundation for biomarker research of dental caries susceptibility.

Carbonic Anhydrases ; Child ; Dental Caries ; Humans ; Matrix Metalloproteinase 9 ; Proteome ; Saliva ; chemistry ; Spectrometry, Mass, Electrospray Ionization ; Tandem Mass Spectrometry

Objective To analyze the difference of prescription dose between ICRU report 83 and Chinese recommendation in the nasopharyngeal carcinoma (NPC) for intensity modulated radiation therapy (IMRT).Methods Eighty-four NPC were treated using IMRT technology from Jan 1,2010 to Apr 1,2012.All dose volume histogram of the 84 IMRT plan were analyzed retrospectively.The target volumes of planning gross tumor volume of nasopharynx (PGTVnx) or planning clinical target volume and high risk lymphatic drainage (PCTV1) and doses of D100,D98,D95,D50,D2 and D0 were recorded.The mean,standard error,medial,range,coefficient of variation (CV) of PGTVnx,PCTV1,and D100,D98,D95,D50,D2and D0 were calculated,respectively.The homogeneity index (HI) and deviation between D95 and D50 of PGTVnx and PCTV1 were calculated,respectively.The differentiation of grouping results were analyzed with grouped t-test method.Results The HI of PGTVnx and PCTV1 were 0.118 ± 0.045 and 0.272 ± 0.037,respectively.It is the bigger target volume,the worse HI;and the advanced T stage,the worse HI.Either PGTVnx or PCTV1,D95 were less than D50.The average deviation was-5.15％ and-10.97％,and the actual difference value was (382± 180) cGy (P=0.000) and (741± 140) cGy (P=0.000).Conclusions D550,which is the recommendation prescription dose of PTV in ICRU report 83,could evaluate accurately the IMRT plan with combining D98 and D2· When D50 is used to instand of D95,the prescription dose of PGTVnx and PCTV1 should increase 5％ and 11％,respectively.

OBJECTIVE: To investigate the risk factor,type and characteristic nystagmus of the otolith abnormal migration during diagnosis and treatment for posterior semicircular canal benign paroxysmal positional vertigo (PSC-BPPV). The therapy and prevention is also discussed. METHOD: Four hundred and seventy-nine patients with PSC-BPPV were treated by Epley's canalith repositioning procedures(CRP) from March 2009 to March 2012. We observed otolith abnormal migration complicating during diagnosis and treatment. According the type of otolith abnormal migration, the additional repositioning maneuver was performed. RESULT: The rate of complication was 8. 1%(39/479), with canal conversion in 5.4%(26/479) and primarily canal reentry in 2.7%(13/479). The rate of incidence of conversion to horizontal canal conversion and anterior canal were 4. 8%(23/479)and 0. 6%(3/479) respectively. All the patient was cured in follow up. The risk factors were unappropriated head movement during or after CRP, including another Dix-Hallpike were performed immediately. CONCLUSION To prevent the complications,the pathognostic positioning sequence and angle of head rotation are commenced during CRP. Appropriate short time postural restrictions post-treatment is necessary. Careful observation of nystagrnus variation is crucial to determine the otolith abnormal migration.
Benign Paroxysmal Positional Vertigo ; therapy ; Head ; Humans ; Incidence ; Nystagmus, Pathologic ; etiology ; Otolithic Membrane ; Patient Positioning ; adverse effects ; Semicircular Canals ; Vertigo

Objective:To analyze morphological character of lateral tibial plateau fracture fragment, and its correlation to the presence of a meniscus injury in tibial plateau fractures.Methods:A total of 79 consecutive patients of the simple lateral tibial plateau fractures from July 201 1 to July 2015 were inclu-ded in this study,with 65 males and 14 females with an average age of (34.3 ±7.2)years and 22-61 years.According to Schatzker classification,21 cases were of Type Ⅰ,41 cases Type Ⅱ,and 17 cases Type Ⅲ.The characteristics of lateral tibial plateau fractures were evaluated by plain X-ray and magnetic resonance imaging (MRI ).The type and severity of meniscus injury were diagnosed by MRI scan. Three-dimensional measurements of the lateral fragment width (LFW),the lateral plateau depression (LPD),the coronal angulation of lateral fragment (CALF),and tibial plateau widening (TPW)were measured with Picture Archiving and Communication Systems(PACS)software.The patients with and without meniscus injuries were divided into different groups and analyzed respectively.Comparison of the above measurements between the two groups was analyzed by independent t test.Results:In all the 79 lateral tibial plateau fracture patients,26 cases (32.9%)of meniscus injuries were detected by MRI. Among all the meniscus injury cases,3 were of SchatzkerⅠ,16 SchatzkerⅡ,and 7 SchatzkerⅢ.In meniscus intact group,the average LFW was (22.0 ±2.8)mm while in meniscus injury group it was (21.3 ±3.3)mm (t =-1.008,P =0.317).The average LPD of non meniscus injury group was (5.4 ±2.8)mm,while in meniscus injury group was (8.7 ±2.8)mm (t=4.98,P=0.001).The average CALF of the two groups were 9.1°±6.1°and 10.6°±7.1°,and there was no significant dif-ference between the two groups (t=0.38,P=0.831).The average TPW was (3.0 ±1.1)mm,and (4.8 ±1 .7 )mm of the two groups.There were significant differences between the two groups (t =5.216,P=0.001).Conclusion:There was no obvious correlation between the LFD and meniscus inju-ry.The CALF of lateral tibial plateau fracture had no significant correlation with meniscus injury either. The degree of LPD and TPW may indicate injury of the meniscus in tibial plateau fractures.

Objective Myofascial pain syndrome (MPS) is a common muscle function disturbance.This study was to investigate the clinical value of acoustic radiation force impulse (ARFI) imaging in assessing the therapeutic effect of acupuncture for patients with trapezius MPS.Methods A total of 116 patients diagnosed with trapezius MPS received acupuncture therapy once a day for 10 days in Pudong Hospital from August 2015 to June 2016.Using ARFI imaging, we recorded the shear wave velocity (SWV) of the trapezius and obtained the short-form McGill Pain Questionnaire (SF-MPQ) scores of the patients before, at the end of, and at 7, 15 and 30 days after treatment.Then, we analyzed the interaction and correlation between the SWV values and SF-MPQ scores of the patients at different time points.Results Both the SF-MPQ scores and SWV values were first decreased, falling to lowest values (5.19 points and 1.43 m/s) at 7 days after treatment, and then increased again.The interaction between the SF-MPQ scores and SWV values were significantly different at different time points (Finteraction=2.553, Pinteraction=0.038), and there was a strong linear correlation between the two indexes (r=0.755, P=0.000).Conclusion ARFI imaging combined with SF-MPQ has a certain clinical value in assessing the effect of acupuncture on trapezius MPS.

This article describes the design and development of an ultrasonic power meter which is consist of an electronic balance, a practice target, an acoustic enclosures and a blocking. The electronic balance mounted on the blocking is linked with the practice target by connecting rod. By adjusting the blocking makes the practice target suspended above ultrasound probe, and then the ultrasonic power can be measured. After initial tests, the ultrasonic power meter performanced with good stability and high precision.
Equipment Design ; Ultrasonics

This paper presents a design of non-blood contacting pneumatic ventricle assistance device, which consisted of several parts, such as dual-cavity cardiac assistance cup, ventricle assistance controller, computer, vacuum pump, and air compressor. And the performance of the non-blood contacting pneumatic ventricle assistance device on mock circulation loop is introduced, which is very close to the normal cardiac output.
Equipment Design ; Heart Ventricles ; Heart-Assist Devices