ABSTRACT
Objective: To identify effect of quantitative indicators of ilium height on approach of percutaneous endoscopic lumbar discectomy (PELD) treatment in patients with L 5, S 1 lumbar disc herniation. Methods: A retrospective study between May 2014 and March 2016 was conducted, including 100 patients with disc herniation at L 5, S 1, who were initially enrolled for the PELD treatment. Among them, 66 patients were successfully treated with PELD (group A), and the other 34 patients failed to perform puncture, catheterization, or microscopical operation due to the influence of iliac bone and other peripheral bone structures and treated with alternative surgical plans. By analyzing the X-ray films of lumbar vertebrae (including bilateral ilium) of the two groups before operation, the concept of ilium height rate and ilium angle rate was put forward innovatively. The ilium height rate and ilium angle rate of the two groups were measured and compared, and the diagnostic critical points of ilium height rate and ilium angle rate were determined by ROC curve analysis. Results: The ilium height rate was 0.61±0.09, 0.74±0.05 and the ilium angle rate was 0.66±0.08, 0.80±0.08 in groups A and B, respectively, showing significant differences between the two groups ( F=69.729, P=0.000; F=65.165, P=0.000). ROC curve analysis showed that the critical point of ilium height rate was 0.71 (area under ROC curve was 0.927, P=0.000), and the critical point of ilium angle rate was 0.75 (area under ROC curve was 0.965, P=0.000). Conclusion: PELD is not recommended for patients with L 5, S 1 intervertebral disc herniation, when the ilium height rate is greater than 0.71 and/or the ilium angle rate is greater than 0.75. Other surgical plans such as transpedicular approach, transpedicular approach, or open surgery, should be recommended to reduce the risk of surgery and the pain of patients.
ABSTRACT
Objective To investigate the implementation situation of scientific research projects in large general hospital,analyze the quantitative evaluation parameters to explore the improvement measures.Methods Sampling survey of all levels of research projects from one general hospital in Shanghai.Based on parameter index quantization,the progress of projects in different levels was com pared and analyzed.Results The progress index and achievement index are reliable quantitative indexes,and there is a linear correlation between these two indexes.Based on progress index,forecast for SCI publication of project can be carried out.There was no significant difference in the progress situa tion of all levels of projects.Higher level of project showed better SCI publication.Conclusions For the process management of scientific research projects at different levels,the quantitative indexes can be used to facilitate the early warning and supervision.Classified assessment should be implied to SCI publication for research projects at different levels.
ABSTRACT
Objective To explore a new way assisted by digital technology to establish a quantitative index to assess the matching performance of anatomically contoured plate. Methods We collected the thin-slice CT data of 20 adults with normal tibias who had received 32-slice spiral CT scanning from April 2015 to June 2016. They were 10 males and 10 females, aged from 28 to 52 years (average, 36.2 years). 3D reconstruction of the tibias was performed with Mimics 18.0. Two brands of 8-hole anatomically contoured plate for distal tibia (Kongli versus GE) were digitized. The curve of the plate facing the bone surface was extracted. The operational process of putting the plate curve on the medial surface of the distal tibia was simulated in Rhino 5.0. The volume of the gap between plate curve and bone surface was measured. The mean distance of the gap between plate cure and bone surface was figured out after the volume divided by the plate area. The inverse value of the mean distance of the gap was used as the index for matching performance. The wall thickness analyzing tool in 3-matic Research was used to mark the various thicknesses of the gap with different colors. The matching performances of the 2 brands of plate were assessed and compared according to the matching performance index and nephogram. Results Of the Kongli 8-hole distal tibial plate, the gap volume was 3,834 mm3± 701 mm3, the mean thickness 1.8 mm ± 0.3 mm, and the matching index 0.56 ± 0.10. Of the GE 8-hole tibial plate, the gap volume was 7,690 mm3± 1,503 mm3, the mean thickness 3.0 mm ± 0.6 mm, and the matching index 0.34 ± 0.06. The significant difference in matching performance between the 2 kinds of plate favored the Kongli plate (t=10.402, P <0.01). There were no significant differences in matching per-formance between different genders among the plates of the same brand (P> 0.05). The nephogram showed a large fixed red area at the proximal part in the GE 8-hole tibial plate. Conclusions As this index for matching performance is simple and intuitive, it can be used to assess and compare the matching performances between different kinds of plates. It can be also used before operation to assess the matching performance of a specific plate for a specific patient to avoid mismatch because of individual differences.
ABSTRACT
Objective To explore the value of the morphological quantitative indexes and the number of emboli in predicting heart function in patients with acute pulmonary embolism (APE)based on computer-aided diagnosis (CAD)technique.Methods One-hundred and forty-eight APE patients confirmed by CT pulmonary angiography (CTPA)in our hospital.Total number of emboli (N)and three morphological quantitative indexes,including total volume of emboli (V),total length (L)and total maximum cross-section embolism proportion (P)were obtained by CAD.The maximal short axis and area of left and right ventricular (LVd,RVd,LVS,RVS)were measured by hand on axial image to calculate the ratio of maximal short axis of right and left ventricular (RVd/LVd)and ratio of maximal area of right and left ventricular (RVS/LVS).The correlation of the above indexes was analyzed by the Pearson correlation of SPSS 22.0.Results The ranking of the correlation between CAD indexes and the heart function was in the order of V,L,P and N.The correlation between CAD indexes and the right heart function was greater than that of the left heart.The V had the strongest correlation with RVd (r=0.544,P=0.000),RVS (r=0.515,P=0.000),RVd/LVd (r=0.595,P=0.000)and RVS/LVS (r=0.579,P=0.000),respectively.While other the CAD indexes had lower correlation with the heart function (|r|:0.167-0.476,P<0.05),and there was no correlation between the N and the left heart function.Conclusion In embolic morphology and quantitative indexes,the V is the best quantitative index to reflect the change of right heart function in APE,which can reflect dys-function of right heart and severity of pulmonary embolism dis-ease in the APE embolism patient.
ABSTRACT
Objective To investigate the factors influencing the casualties caused by combat stress reaction during sea warfare and their priorities, so as to provide evidence for predicting naval combat stress attrition. Methods The consultation experts of military medical psychology and military health service were selected for a two rounds of expert questionnaire survey; the quantitative index system was established by using Delphi method. Names and meanings of each index were revised according to the experts' suggestions after two rounds of consulting.The weights of each index were also determined by experts' evaluation. Results The recovery rates in the two rounds of questionnaire consultation were both 100%. The level of expert authority was all over 0.8.The index weight system was set up for factors influencing combat stress attrition during sea warfare, including 3 primary indices, 11 second level ones and 51 third level ones; and the weight of each index were also determined. Conclusion The established system in this study may provide a foundation to predict the combat stress attrition during sea warfare and is helpful for more effective medical service.