目的 探讨个体化低速率对比剂注射方案联合低管电压扫描在低体质量指数(body mass index,BMI)受检者头颈部CT血管成像的可行性。方法 选取我科2020年1月—2020年11月低BMI受检者头颈部CTA检查90例进行研究,随机分成三组,每组30例。A组80 kV扫描,低流速、低总量注射方案; B组120 kV扫描,高流速、低总量注射方案;C组为120kV扫描条件,高流速、高总量注射方案。对比各组注射流速、注射总量、辐射剂量长度乘积(dose legth product,DLP),评价各组图像的主动脉弓、颈总动脉、基底动脉、胸锁乳突肌中段的CT值、信噪比及对比信噪比,由两名有经验的放射科医生对各组图像质量进行主观评价。结果 图像质量主观评价A、B两组图像评分集中在4分段,C组图像评分集中在3分段,A、B组与C组主观评分比较差异有统计学意义(P<0.05)。A组对比剂注射流速和DLP比B、C组分别下降27.75%、47.10%;A、B组对比剂注射总量较C组下降39.87%,差异有统计学意义(P<0.05)。A组各血管CT值对应比B、C组数值稍高,除主动脉弓CT值外其余血管客观参数对比均有差异(P<0.05)。结论 低BMI受检者头颈部CT血管个体化低流速精准对比剂注射方案联合低管电压扫描技术在获得满足诊断要求图像质量的前提下,既能降低受检者对比剂注射速率和注射风险,又能降低辐射剂量,值得推广应用。

Objective To explore the feasibility of individualized low rate contrast agent injection scheme combined with low tube voltage scanning in CTA imaging of low body mass index(BMI) subjects' head and neck. Methods Ninety cases of head and neck CTA examination of low BMI subjects in our department from January 2020 to November 2020 were selected for the study, and randomly divided into three groups with 30 cases in each group. Group A applied 80 kV scanning, low flow rate and low total volume injection scheme. Group B applied 120 kV scanning, high flow rate, low total volume injection scheme. Group C applied 120 kV scanning, high flow rate and high total volume injection scheme. The injection velocity, injection volume, radiation dose length product (DLP) among three groups were compared. In each image of the aortic arch, common carotid artery, basilar artery and the central part of sternocleidomastoid, the CT value, the signal-to-noise ratio and contrast-to-noise ratio were evaluated. Two experienced radiologists performed image quality evaluation. Results Image quality in group A and B by subjective evaluation got 4 points out of 4, and group C got 3 points out of 4, and there was statistical difference between group A, B and C in subjective evaluation of image quality (P<0.05). The injection velocity and DLP of contrast agent in group A were 27.75% and 47.10% lower than those in group B and C, respectively. The total amount of contrast agent injection in groups A and B was decreased by 39.87% compared with group C, with statistical difference (P<0.05). The corresponding CT values of each vessel in group A were slightly higher than those in group B and C, and there were statistically significant differences in the Objective parameters of other vessels except for aortic arch (P<0.05). Conclusion The combination of individualized low flow rate and precise contrast agent injection scheme with low tube voltage scanning technology for low BMI subject could not only reduce the injection rate and risk of contrast agent, but also reduce radiation dose, on the premise of meeting the diagnostic requirements of image quality. It is worthy of popularization and application.

目的 研究比较低流量异氟烷与七氟烷麻醉在小儿腹腔镜手术中的麻醉效果。方法 选取在我院进行腹腔镜手术治疗的小儿患者120例作为研究对象,随机分为异氟烷和七氟烷两组,每组各60例,分别采用低流量异氟烷和七氟烷进行麻醉,比较两组患儿的相关麻醉参数,以及入睡、苏醒、拔管时间和不良反应情况。结果 两组患儿的不同时期脉搏氧饱和度、心率、呼气末二氧化碳浓度比较无差异(P＞0.05);七氟烷组患儿的不同时期的平均动脉压具有较强的稳定性,而异氟烷组患儿在诱导期间、手术过程中平均动脉压降低,差异有统计学意义(P＜0.05)。结论 在小儿腹腔镜手术过程,采用低流量七氟烷进行麻醉,可以使手术过程中血流动力学更加稳定,缩短术后拔管时间,减少术后不良反应发生,更易满足小儿腹腔镜手术的麻醉要求。

Objective To investigate efficacy between low flow isoflurane and sevoflurane in pediatric laparoscopic surgery. Methods 120 cases of children underwent laparoscopic surgery in our hospital were randomly divided into two groups. 60 patients in isoflurane group were given low-flow isoflurane anesthesia; 60 patients in sevoflurane group were given low-flow isoflurane anesthesia. Heart rate (HR), mean arterial blood pressure (MAP), pulse oxygen saturation (SpO₂), end-tidal partial pressure of carbon dioxide (EtCO₂) at different period, sleep and awakening time, extubation time, and adverse reactions of two groups were observed. Results Heart rate (HR), pulse oxygen saturation (SpO₂), end-tidal partial pressure of carbon dioxide (EtCO₂) of two groups at different period had no significantly difference (P>0.05). Mean arterial blood pressure (MAP) of two groups at different period had significantly difference (P<0.05). The sleep time and recovery time of two groups had no significant difference (P>0.05). The extubation time of sevoflurane was significantly lower than isoflurane group (P<0.05). The adverse reaction rate of sevoflurane was significantly lower than isoflurane group (P<0.05). Conclusion Low flow isoflurane and sevoflurane can be used in pediatric laparoscopic surgery, and the efficacy of sevoflurane is better.