<strong>Introduction</strong> <span style="font-family:""><span style="font-family:Verdana;">Accurate pregnancy dating is important for many aspects of </span><...<strong>Introduction</strong> <span style="font-family:""><span style="font-family:Verdana;">Accurate pregnancy dating is important for many aspects of </span><span style="font-family:Verdana;">obstetric care at individual level as well as population level. Traditionally</span></span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> pregnancy</span><span style="font-family:Verdana;"> dating has done by adding 9 months and 7 days to the last menstrual period (LMP) using Naegele’s formula. Determination of gestational age by ultrasound is more precise. Most commonly used parameters are mean sac diameter, gestation sac volume, crown</span><span style="font-family:Verdana;">-</span><span style="font-family:Verdana;">rump length (CRL), biparietal diameter (BPD), head circumference (HC) and femur length (FL). After 24 weeks</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> gestational age cannot be accurately determined by ultrasound scans. The biological variability of CRL is small and growth is very rapid. There are </span><span style="font-family:Verdana;">many factors</span><span style="font-family:"color:red;"> </span><span style="font-family:""><span style="font-family:Verdana;">that</span><span style="color:red;"> </span></span><span style="font-family:""><span style="font-family:Verdana;">can affect CRL such as measurement errors, differences in growth rates between individuals, fetal sex and maternal conditions such as diabetes </span><span style="font-family:Verdana;">mellitus. A correctly performed measurement of CRL is the most accurate way</span><span style="font-family:Verdana;"> of estimating the gestational age in early pregnancy from 8 weeks to 13 weeks + 6 days. </span><b><span style="font-family:Verdana;">Objectives </span></b><span style="font-family:Verdana;">Our study aims were to prepare a new Crown Rump Length chart with Sri Lankan population data and to compare </span><span><span style="font-family:Verdana;">new CRL chart with existing intergrowth CRL chart.</span><b><span style="font-family:Verdana;"> Method </span></b><span style="font-family:Verdana;">Prospective observationa</span></span><span style="font-family:Verdana;">l study with recruitment of subjects by Quota sampling technique was carried out from April 2015 to March 2016. Spontaneously conceived uncomplicated singleton pregnancies with normal Body Mass Index (BMI) 18.5 - 23 kg/m</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> were recruited at the time of registration to antenatal care. Consenting woman with known LMP with regular cycles in preceding 3 months were undergone ultrasound examination only once at gestational age (GA) ranging from 8 weeks to 13 weeks + 6 days. If ultrasound dating w</span></span><span style="font-family:Verdana;">as</span><span style="font-family:Verdana;"> different from LMP dating by more than 5 days in pregnancies with POA less than 9 weeks and dating difference</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> more than 7 days in pregnancies between 9 weeks and 14 weeks w</span><span style="font-family:Verdana;">ere</span><span style="font-family:""><span style="font-family:Verdana;"> excluded. Pregnancies complicated with uncertain viability, congenital anomalies and spontaneous miscarriage were excluded from statistical analysis. Data collection done with pre-tested interviewer administered form and analysis was carried out using the Statistical Package for Social Sciences (SPSS) version 21. </span><b><span style="font-family:Verdana;">Results </span></b><span style="font-family:Verdana;">A total of 653 subjects were recruited for the study and 557 turned up for ultrasound dating assessment. Dating discrepancy and multiple pregnancies excluded 31 subjects, uncertain viability and spontaneous miscarriage excluded 15 subjects resulting 511 subjects for final statistical analysis. The mean CRL increased with GA almost linearly from day 56 to 97. </span><b><span style="font-family:Verdana;">Conclusions </span></b><span style="font-family:Verdana;">We have produced new CRL chart based on Sri Lankan data and it can be used for clinical practice in Sri Lanka. There is no statistically significant difference between our CRL chart and intergrowth CRL chart.</span></span>展开更多
目的探讨静脉治疗专科护士主导的胸部CT扫描在预测经外周静脉置入中心静脉导管(peripherally inserted central catheter,PICC)置入长度中的应用效果。方法选取2022年6月至2023年3月于安徽医科大学第二附属医院置管的110例患者作为研究...目的探讨静脉治疗专科护士主导的胸部CT扫描在预测经外周静脉置入中心静脉导管(peripherally inserted central catheter,PICC)置入长度中的应用效果。方法选取2022年6月至2023年3月于安徽医科大学第二附属医院置管的110例患者作为研究对象,采用随机数字表法结合信封法分为对照组与观察组,每组55例。对照组采用传统体外测量法,观察组采用CT测量法,比较两组置管后1周内静脉炎发生情况、PICC导管尖端一次性到位率和满意度。结果观察组PICC导管尖端一次性到位率高于对照组,差异有统计学意义(P<0.05);观察组静脉炎发生率为1.81%,低于对照组的16.36%,差异有统计学意义(P<0.05);观察组满意度高于对照组,差异有统计学意义(P<0.05)。结论静脉治疗专科护士主导的胸部CT测量法可以更好地预测PICC置入的长度,且该操作无侵入性,安全有效,具有临床推广应用价值。展开更多
文摘<strong>Introduction</strong> <span style="font-family:""><span style="font-family:Verdana;">Accurate pregnancy dating is important for many aspects of </span><span style="font-family:Verdana;">obstetric care at individual level as well as population level. Traditionally</span></span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> pregnancy</span><span style="font-family:Verdana;"> dating has done by adding 9 months and 7 days to the last menstrual period (LMP) using Naegele’s formula. Determination of gestational age by ultrasound is more precise. Most commonly used parameters are mean sac diameter, gestation sac volume, crown</span><span style="font-family:Verdana;">-</span><span style="font-family:Verdana;">rump length (CRL), biparietal diameter (BPD), head circumference (HC) and femur length (FL). After 24 weeks</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> gestational age cannot be accurately determined by ultrasound scans. The biological variability of CRL is small and growth is very rapid. There are </span><span style="font-family:Verdana;">many factors</span><span style="font-family:"color:red;"> </span><span style="font-family:""><span style="font-family:Verdana;">that</span><span style="color:red;"> </span></span><span style="font-family:""><span style="font-family:Verdana;">can affect CRL such as measurement errors, differences in growth rates between individuals, fetal sex and maternal conditions such as diabetes </span><span style="font-family:Verdana;">mellitus. A correctly performed measurement of CRL is the most accurate way</span><span style="font-family:Verdana;"> of estimating the gestational age in early pregnancy from 8 weeks to 13 weeks + 6 days. </span><b><span style="font-family:Verdana;">Objectives </span></b><span style="font-family:Verdana;">Our study aims were to prepare a new Crown Rump Length chart with Sri Lankan population data and to compare </span><span><span style="font-family:Verdana;">new CRL chart with existing intergrowth CRL chart.</span><b><span style="font-family:Verdana;"> Method </span></b><span style="font-family:Verdana;">Prospective observationa</span></span><span style="font-family:Verdana;">l study with recruitment of subjects by Quota sampling technique was carried out from April 2015 to March 2016. Spontaneously conceived uncomplicated singleton pregnancies with normal Body Mass Index (BMI) 18.5 - 23 kg/m</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> were recruited at the time of registration to antenatal care. Consenting woman with known LMP with regular cycles in preceding 3 months were undergone ultrasound examination only once at gestational age (GA) ranging from 8 weeks to 13 weeks + 6 days. If ultrasound dating w</span></span><span style="font-family:Verdana;">as</span><span style="font-family:Verdana;"> different from LMP dating by more than 5 days in pregnancies with POA less than 9 weeks and dating difference</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> more than 7 days in pregnancies between 9 weeks and 14 weeks w</span><span style="font-family:Verdana;">ere</span><span style="font-family:""><span style="font-family:Verdana;"> excluded. Pregnancies complicated with uncertain viability, congenital anomalies and spontaneous miscarriage were excluded from statistical analysis. Data collection done with pre-tested interviewer administered form and analysis was carried out using the Statistical Package for Social Sciences (SPSS) version 21. </span><b><span style="font-family:Verdana;">Results </span></b><span style="font-family:Verdana;">A total of 653 subjects were recruited for the study and 557 turned up for ultrasound dating assessment. Dating discrepancy and multiple pregnancies excluded 31 subjects, uncertain viability and spontaneous miscarriage excluded 15 subjects resulting 511 subjects for final statistical analysis. The mean CRL increased with GA almost linearly from day 56 to 97. </span><b><span style="font-family:Verdana;">Conclusions </span></b><span style="font-family:Verdana;">We have produced new CRL chart based on Sri Lankan data and it can be used for clinical practice in Sri Lanka. There is no statistically significant difference between our CRL chart and intergrowth CRL chart.</span></span>
文摘目的探讨静脉治疗专科护士主导的胸部CT扫描在预测经外周静脉置入中心静脉导管(peripherally inserted central catheter,PICC)置入长度中的应用效果。方法选取2022年6月至2023年3月于安徽医科大学第二附属医院置管的110例患者作为研究对象,采用随机数字表法结合信封法分为对照组与观察组,每组55例。对照组采用传统体外测量法,观察组采用CT测量法,比较两组置管后1周内静脉炎发生情况、PICC导管尖端一次性到位率和满意度。结果观察组PICC导管尖端一次性到位率高于对照组,差异有统计学意义(P<0.05);观察组静脉炎发生率为1.81%,低于对照组的16.36%,差异有统计学意义(P<0.05);观察组满意度高于对照组,差异有统计学意义(P<0.05)。结论静脉治疗专科护士主导的胸部CT测量法可以更好地预测PICC置入的长度,且该操作无侵入性,安全有效,具有临床推广应用价值。
