目的探讨床旁重症超声对休克患儿的诊断及治疗价值。方法选择2019年5月1日至2020年4月31日中国医科大学附属盛京医院PICU收治的休克患儿,并对休克患儿应用休克患者快速超声评估(rapid ultrasound in shock,RUSH)方案进行心肺及腹部形态...目的探讨床旁重症超声对休克患儿的诊断及治疗价值。方法选择2019年5月1日至2020年4月31日中国医科大学附属盛京医院PICU收治的休克患儿,并对休克患儿应用休克患者快速超声评估(rapid ultrasound in shock,RUSH)方案进行心肺及腹部形态、功能评估,以辅助休克诊断及治疗。结果26例休克患儿,入院时立即根据RUSH方案进行评估,诊断为脓毒性休克8例,心源性休克6例,低血容量性休克6例,混合性休克6例。心源性休克患儿左室射血分数(26.5±8.24)%,下腔静脉宽度均大于10 mm,休克纠正后左室射血分数上升至(32.17±26.11)%。脓毒性休克患儿入院时左室射血分数(73.25±1.28)%,休克纠正时左室射血分数(50.12±31.41)%。26例休克患儿液体复苏1 h后9例(34.6%)肺部超声发现较多B线;其中,心源性休克液体复苏1 h后约50%患儿肺部超声发现较多B线,存活患儿休克纠正后11例(57.9%)出现较多B线,但仅有6例患儿查体可闻及水泡音。结论根据RUSH方案对休克患儿容量状态、心脏功能、容量反应性及病灶进行评估,结合病史及其他临床资料,更早更准确地分辨休克类型并辅助指导液体复苏,利于患儿的精确、个体化液体管理和治疗。展开更多
The increase of frame rate,though with the potential in a coded ultrasound system,is generally concomitant with the simultaneous transmission of a number of apertures,and in consequence leads to increased cross-talks ...The increase of frame rate,though with the potential in a coded ultrasound system,is generally concomitant with the simultaneous transmission of a number of apertures,and in consequence leads to increased cross-talks between different apertures.In view of this,a new coding scheme using staggering repetition interval was proposed.The transmitting signals were constructed by repeating the two(or more) modulated codes using staggering repetition interval,and then allocated to and transmitted simultaneously among different apertures.The decoding process was based on the subsection-matched filter under the assistance of different matched filters for different apertures.At last the outputs of subsection-matched filtering were added together.Staggering changed the positions of cross-correlation(CC) peaks from coinciding,which resulted in an effective reduction of CC.Our theoretical analysis and simulations showed that,the coding scheme can be used to reduce cross-talk,and a good cross-talk reduction will be achieved if the staggering delay is kept in an appropriate range.展开更多
基金Project (Nos.60772147 and 60871060) supported by the National Natural Science Foundation of China
文摘The increase of frame rate,though with the potential in a coded ultrasound system,is generally concomitant with the simultaneous transmission of a number of apertures,and in consequence leads to increased cross-talks between different apertures.In view of this,a new coding scheme using staggering repetition interval was proposed.The transmitting signals were constructed by repeating the two(or more) modulated codes using staggering repetition interval,and then allocated to and transmitted simultaneously among different apertures.The decoding process was based on the subsection-matched filter under the assistance of different matched filters for different apertures.At last the outputs of subsection-matched filtering were added together.Staggering changed the positions of cross-correlation(CC) peaks from coinciding,which resulted in an effective reduction of CC.Our theoretical analysis and simulations showed that,the coding scheme can be used to reduce cross-talk,and a good cross-talk reduction will be achieved if the staggering delay is kept in an appropriate range.
