目的研究青年男性基层士兵与健康青年男性踝关节软骨厚度值、负荷下踝关节软骨厚度变化的差异。方法以20例青年男性基层士兵为实验组,20例青年男性健康人为对照组,两组年龄无明显差异。利用自制下肢关节负荷装置,对其右踝关节施加负荷,...目的研究青年男性基层士兵与健康青年男性踝关节软骨厚度值、负荷下踝关节软骨厚度变化的差异。方法以20例青年男性基层士兵为实验组,20例青年男性健康人为对照组,两组年龄无明显差异。利用自制下肢关节负荷装置,对其右踝关节施加负荷,加压前后行3.0 T磁共振扫描采用T1 VIBE 3D FS序列进行右踝关节软骨成像,分别测量加压前后踝关节软骨三个兴趣部位厚度值,并计算负荷下踝关节软骨厚度压缩比率。结果基层士兵和对照组的踝关节软骨厚度值分别为:外侧(2.76±0.36)mm和(2.30±0.30)mm(P<0.001);中间(2.72±0.32)mm和(2.23±0.26)mm(P<0.001);内侧(2.79±0.36)mm和(2.31±0.28)mm(P<0.001)。基层士兵踝关节软骨厚度在加压前后分别为:外侧(2.76±0.36)mm和(2.45±0.36)mm(P<0.001);中间(2.72±0.32)mm和(2.46±0.29)mm(P<0.001);内侧(2.79±0.36)mm和(2.52±0.36)mm(P<0.001)。对照组踝关节软骨厚度在加压前后分别为外侧(2.30±0.30)mm和(2.20±0.29)mm(P<0.001);中间(2.23±0.26)mm和(2.13±0.25)mm(P<0.001);内侧(2.31±0.28)mm和(2.22±0.26)mm(P<0.001)。基层士兵和对照组负荷下踝关节软骨厚度压缩率分别为:外侧(11.22±4.81)%和(4.15±1.43)%(P<0.001);中间(9.65±2.65)%和(4.42±1.48)%(P<0.001);内侧(9.95±3.95)%和(4.13±1.35)%(P<0.001);基层士兵负荷下踝关节软骨厚度压缩率与每周训练总时长具有相关性(P<0.001)。结论基层士兵踝关节软骨厚度值高于对照组;负荷下踝关节软骨厚度值减小;基层士兵负荷下踝关节软骨厚度压缩率高于对照组,并且每周军事训练时长越久、压缩率相对越高。展开更多
IM To determine the incidence of hepatitis B virus (HBV) intrauterine infection and to explore the relationship between HBV viremia level of pregnant women and HBV intrauterine infection.METHODS Sixtynine pregnant w...IM To determine the incidence of hepatitis B virus (HBV) intrauterine infection and to explore the relationship between HBV viremia level of pregnant women and HBV intrauterine infection.METHODS Sixtynine pregnant women were divided into three groups. Group A, 41 HBsAg positive patients, 14 of them were HBeAg positive (group A1), and 27 HBeAg negative (group A2); Group B, 12 HBsAg negative patients, but positive for antiHBs and/or antiHBe and/or antiHBc; and Group C, 16 patients negative for all HBV markers. Blood samples of mothers were taken at delivery, samples of their infants were collected within 24 hours after birth (before injection of HBIG and HBV vaccine). All the serum samples were stored at -20℃. HBV serum markers were tested by radioimmunoassay and HBV NDA were detected by nested polymerase chain reaction.RESULTS In group C, all of 16 newborns were negative for HBsAg and HBV DNA. In group A, 7 infants were HBsAg positive (171%), and 17 (415%) were HBV DNA positive (P<005). The incidence of intrauterine HBV infection was much higher in group A1 than that in group A2 (HBsAg 429% vs 37%, HBV DNA 929% vs 148%, P<005). The incidence of HBV intrauterine infection was significantly different between high and low HBV viremia of mothers (933% vs 429%, P<005).CONCLUSION The incidence of HBV intrauterine infection is high when HBV DNA in newborns detected with nested PCR is used as a marker of HBV infection. It is related to HBV viremia level of mothers.展开更多
文摘目的研究青年男性基层士兵与健康青年男性踝关节软骨厚度值、负荷下踝关节软骨厚度变化的差异。方法以20例青年男性基层士兵为实验组,20例青年男性健康人为对照组,两组年龄无明显差异。利用自制下肢关节负荷装置,对其右踝关节施加负荷,加压前后行3.0 T磁共振扫描采用T1 VIBE 3D FS序列进行右踝关节软骨成像,分别测量加压前后踝关节软骨三个兴趣部位厚度值,并计算负荷下踝关节软骨厚度压缩比率。结果基层士兵和对照组的踝关节软骨厚度值分别为:外侧(2.76±0.36)mm和(2.30±0.30)mm(P<0.001);中间(2.72±0.32)mm和(2.23±0.26)mm(P<0.001);内侧(2.79±0.36)mm和(2.31±0.28)mm(P<0.001)。基层士兵踝关节软骨厚度在加压前后分别为:外侧(2.76±0.36)mm和(2.45±0.36)mm(P<0.001);中间(2.72±0.32)mm和(2.46±0.29)mm(P<0.001);内侧(2.79±0.36)mm和(2.52±0.36)mm(P<0.001)。对照组踝关节软骨厚度在加压前后分别为外侧(2.30±0.30)mm和(2.20±0.29)mm(P<0.001);中间(2.23±0.26)mm和(2.13±0.25)mm(P<0.001);内侧(2.31±0.28)mm和(2.22±0.26)mm(P<0.001)。基层士兵和对照组负荷下踝关节软骨厚度压缩率分别为:外侧(11.22±4.81)%和(4.15±1.43)%(P<0.001);中间(9.65±2.65)%和(4.42±1.48)%(P<0.001);内侧(9.95±3.95)%和(4.13±1.35)%(P<0.001);基层士兵负荷下踝关节软骨厚度压缩率与每周训练总时长具有相关性(P<0.001)。结论基层士兵踝关节软骨厚度值高于对照组;负荷下踝关节软骨厚度值减小;基层士兵负荷下踝关节软骨厚度压缩率高于对照组,并且每周军事训练时长越久、压缩率相对越高。
文摘IM To determine the incidence of hepatitis B virus (HBV) intrauterine infection and to explore the relationship between HBV viremia level of pregnant women and HBV intrauterine infection.METHODS Sixtynine pregnant women were divided into three groups. Group A, 41 HBsAg positive patients, 14 of them were HBeAg positive (group A1), and 27 HBeAg negative (group A2); Group B, 12 HBsAg negative patients, but positive for antiHBs and/or antiHBe and/or antiHBc; and Group C, 16 patients negative for all HBV markers. Blood samples of mothers were taken at delivery, samples of their infants were collected within 24 hours after birth (before injection of HBIG and HBV vaccine). All the serum samples were stored at -20℃. HBV serum markers were tested by radioimmunoassay and HBV NDA were detected by nested polymerase chain reaction.RESULTS In group C, all of 16 newborns were negative for HBsAg and HBV DNA. In group A, 7 infants were HBsAg positive (171%), and 17 (415%) were HBV DNA positive (P<005). The incidence of intrauterine HBV infection was much higher in group A1 than that in group A2 (HBsAg 429% vs 37%, HBV DNA 929% vs 148%, P<005). The incidence of HBV intrauterine infection was significantly different between high and low HBV viremia of mothers (933% vs 429%, P<005).CONCLUSION The incidence of HBV intrauterine infection is high when HBV DNA in newborns detected with nested PCR is used as a marker of HBV infection. It is related to HBV viremia level of mothers.
