桡动脉弹性感知法在动脉血气标本采集中的应用效果观察

动脉血气分析是判断机体是否存在酸碱平衡失调以及缺氧和缺氧程度的可靠指标,是重要的重症监护参数,可指导临床诊断和治疗.桡动脉具有易暴露、表浅、易触及、便于按压等优点,目前广泛用于动脉血气标本采集.我科在临床护理工作中发现,在桡动脉搏动最明显处垂直进针的方法,护士的穿刺成功率不高,

腕部固定联合食指感知法在动脉血采集中的应用

[目的]探讨腕部固定联合食指感知法在动脉血采集中的应用效果。[方法]根据随机数字表法将2017年1月—2018年6月行桡动脉采血的120例病人分为对照组和观察组各60例,对照组采取常规桡动脉采血方法,观察组采取腕部固定联合食指感知法采血。比较两组病人的一次穿刺成功率、疼痛程度、穿刺操作时间以及病人满意度。[结果]观察组病人一次穿刺成功率为91.67%,高于对照组的78.33%(P<0.05);观察组病人穿刺疼痛程度评分以及穿刺操作时间均低于对照组(P<0.05);观察组病人满意度高于对照组(P<0.05)。[结论]在桡动脉采血中应用腕部固定联合食指感知法,可以提高病人一次穿刺成功率及满意度,缩短穿刺操作时间,减轻疼痛程度。

A network-aware error-resilient method using prioritized intra refresh for wireless video communications

We propose a novel prioritized intra refresh method for the wireless video communication.The proposed method considers the characteristics of the human visual system,the error-sensitivity of the bitstream,and the state of the time-varying wireless channel jointly.An expected perceptual distortion model was used to adjust the intra refresh rate adaptively.This model consists of the perceptual weight map based on an attention model,the bit error probability map based on bitstream size,and the dynamic channel state information(CSI).Experimental results indicate that,compared with other intra refresh methods that consider only the content of the video or the CSI,the proposed method improves the average peak signal-to-noise ratio(PSNR) of the whole frame by about 0.5 dB,and improves the average PSNR of the attention-area by about 0.8 dB.