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Objective@#To construct the Z-score models for normal fetal brain fissures.@*Methods@#Four hundred and eighty-seven pregnant woman who underwent prenatal ultrasonography from January to August 2018 in the Second Xiangya Hospital of Central South University were collected randomly for analysis, and all the fetuses(18-38 weeks) were healthy. The calacarine fissure, pariet-ooccipital fissure, sylvian fissure of the fetuses were measured and they were chosed as the dependent variables, while the independent variable were the gestational age and biparietal diamete, as well as femur length. The regression analyses of the mean(M) and the standard deviation(SD) for each parameter were performed separately. Two observers randomly measured the brain fissures depth two hours apart to evaluate the interobserver repeatability.@*Results@#The brain fissure depth in normal fetuses during geatational age between 18 to 38 weeks can be evaluated by Z-score model.Positive correlations were found between the depth of calacarine fissure, pariet-ooccipital fissure, sylvian fissure and gestational age, biparietal diameter and femur length.@*Conclusions@#Z-score can intuitively reflect the development of brain fissure more accurate, and is valuable, and can be used as a powerful supplement to the traditional method.
ABSTRACT
Objective To construct the Z-score models for normal fetal brain fissures.Methods Four hundred and eighty-seven pregnant woman who underwent prenatal ultrasonography from January to August 2018 in the Second Xiangya Hospital of Central South University were collected randomly for analysis,and all the fetuses(18-38 weeks) were healthy.The calacarine fissure,pariet-ooccipital fissure, sylvian fissure of the fetuses were measured and they were chosed as the dependent variables,while the independent variable were the gestational age and biparietal diamete,as well as femur length.The regression analyses of the mean(M) and the standard deviation(SD) for each parameter were performed separately. Two observers randomly measured the brain fissures depth two hours apart to evaluate the interobserver repeatability.Results The brain fissure depth in normal fetuses during geatational age between 18 to 38 weeks can be evaluated by Z-score model.Positive correlations were found between the depth of calacarine fissure,pariet-ooccipital fissure,sylvian fissure and gestational age,biparietal diameter and femur length. Conclusions Z-score can intuitively reflect the development of brain fissure more accurate,and is valuable, and can be used as a powerful supplement to the traditional method.
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Objective To study the changes of blood flow in posterior cerebral artery ( PCA ) in complete transposition of great arteries (CTGA) through the application of the pulsed Doppler . Methods Twenty CTGA fetuses ( CTGA group) and 20 healthy control fetuses ( control group) were involved ,the blood flow indexes peak systolic velocity ( Vs) ,end-diastolic velocity ( Vd) ,pulsatility index ( PI) ,resistance index ( RI) ,velocity-time integral ( VTI) of PCA-S1 ,PCA-S2 and MCA of the fetuses in the two groups were detected by pulsed Doppler . The differences in blood flow indexes between CTGA fetuses and healthy controls were analyzed by independent t -test . The rates of abnormal resistance in PCA-S1 and MCA in CTGA fetuses were compared through Chi-square test ( χ2 test) . Results Compared with control group ,the MCA-PI ,MCA-RI ,PCA-S1-PI and PCA-S1-RI of CTGA group decreased significantly( all P < 0 .05) ,MCA-VTI ,PCA-S1-VTI ,PCA-S2-VTI increased significantly ( all P < 0 .05) ,but no significant difference was found in PCA-S2-PI ,PCA-S2-RI ,Vs and Vd of the MCA and the PCA ( all P > 0 .05 ) . The rate of abnormal resistance in the MCA was significantly lower than that in the PCA-S1 in CTGA group ( P <0 .05) . Conclusions The pulsed Doppler can be used to study the changes of blood flow in PCA of CTGA fetuses and the differences of specific hemodynamic alterations may occured in different segments of the PCA in CTGA fetuses ,indicating a tendency to protect the PCA-supplying areas of the brain when ischemia and hypoxia .
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Objective To study the clinical effect of cemented long stem prosthesis and memory alloy embracing fixator in the treatment of type B2 periprosthetic fractures.Methods Fom April 2014 to April 2016,102 cases of peripheral B2 periprosthetic fractures patients were selected and randomly divided into bone cement long stem prosthesis revision surgery(group A) and revision of cemented long stem prosthesis combined with memory alloy embracing fixator(group B),each group with 51 cases.Clinical efficacy was evaluated according to Beals and Tower criteria,used Harris score to evaluate the hip the joint function,used the Visual Analogue Scale(VAS) score to evaluate the pain,after follow-up of 40 months,the clinical curative effect of 2 groups of patients,fracture healing time,complications and Harris score and VAS score were observed.Results The excellent rate of B group was significantly higher than that of A group,with statistical significance(90.2% vs.72.5%,χ2=5.239,P<0.05).Fracture healing time of group B was shorter than that of group A,with statistically significant ((10.2±2.5) weeks vs.(21.3±8.9) weeks,t=8.575,P<0.05).Harris the score of group B was higher than the group A,with statistically significant((89.9±13.5) points vs.(71.2±18.9) points,t=5.750,P<0.05).VAS score of group B was significantly lower than the group A,with statistically significant((1.23±0.25) points vs.(5.98±1.08) points,t=30.600,P<0.05).There were no complications such as infection,nonunion,loss of reduction and loosening of internal fixation in the 2 groups.Conclusion Revision of cemented long stem prosthesis combined with memory alloy embracing fixator is an ideal methods for the treatment of type B2 periprosthetic femoral fractures,which provides a good initial stability for fracture healing.