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Objective To evaluate the anatomical factor and risk assessment of right internal jugular vein (IJV) puncture-related damage to the vertebral artery (VA) at different neck planes in pediatric patients.Methods Two hundred and ten pediatric patients of both sexes,aged 6 months-10 yr,with body mass index less than 28 kg/m2,undergoing elective surgery,were enrolled in this study.At the cricoid cartilage plane,supraclavicular area plane and intermediate plane,the right IJVs and VAs were examined using ultrasound.The VA position relative to the IJV,diameters of IJVs and VAs (the diameter ratio of VAs to IJVs was calculated),extent of overlap between IJVs and VAs,and horizontal and vertical distance from VAs to IJVs were recorded,and the risk coefficient of accidental VA puncture was calculated.Results Ninety-seven percent of VAs lay deep and lateral to right IJVs.There was no significant difference in each parameter of VA position relative to IJVs between the three planes (P＞0.05).The diameter ratio of VAs to IJVs was decreased with the decreasing neck plane,the horizontal and vertical distance from VAs to IJVs was significantly shortened,the overlapping rate between VAs and IJVs was increased,and the risk coefficient of accidental VA puncture was increased (P＜0.05 or 0.01).The vertical distance from VAs to IJVs was not correlated with age,body weight or height (P＞0.05).The risk coefficient of VA damage was not correlated with age,body weight or height at the cricoid cartilage plane and intermediate plane (P ＞ 0.05).The risk coefficient of VA damage was positively correlated with the weight of pediatric patients at the supraclavicular area plane (P＜0.05,r=0.215).Conclusion Right VAs come nearer IJVs with the decreasing neck plane;the risk of VA damage increases gradually with the lowering of neck planes in pediatric patients.
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Objective To explore the distribution of common gene types of thalassemia in Yangjiang, Guangdong, so as to provide a theoretical basis for clinical diagnosis, prevention and treatment. Methods A total of 9, 277 cases were collected from the Department of gynaecologic outpatient, antenatal clinic, outpatient department of Pediatrics and children's health care department from April 2015 to April 2017. PCR + conduction hybridization was used to detect alpha thalassemia and beta thalassemia. Results In 9 277 cases, the detection of α thalassemia in 1 711 cases, accounting for 18. 44％(1 711/9 277); detection of thalassemia in 671 cases, accounting for 7. 24％ (671/9 277), there are 3 kinds of β thalassemia homozygote, α thalassemia and β thalassemia with 100 cases, accounting for 1. 08％ (100/9 277), which detected 16 α thalassemia gene type 14 β thalassemia gene type. Conclusion Guangdong Yangjiang area of αthalassemia by ～(--SEA)/αα and β thalassemia major in β～(CD41-42)/βN and β～(654)/β～N, β～(-28)/β～N, α and β thalassemia gene type compound less investigation for diagnosis, treatment and prevention of thalassemia has important significance, is worth promoting in clinical.