脉动真空灭菌柜对组装注射器灭菌效果的研究

本文为探讨注射器组装后在脉动真空灭菌柜灭菌的效果,使用了嗜热脂肪芽胞杆菌菌片及染菌法进行了监测。结果表明,注射器组装后在脉动真空灭菌柜灭菌达到了无菌要求。组装后与分开包装灭菌无差异,为供应室在今后的工作中使用此法提供了理论依据     

视频显示终端脉冲磁场对细胞间隙连接通讯功能的影响研究

目的：研究视频显示终端（ＶＤＴ）脉冲磁场对细胞间隙连接通讯功能的影响。方法：用１５．６ｋＨｚ、峰值强度为２００ μＴ的脉冲磁场（ＰＭＦ）和（或）十四酰基咐拜醇酯（ＴＰＡ：５ ｎｇ／ｍ ｌ）对培养的中国仓鼠肺成纤维细胞（ＣＨＬ）进行辐射２４ ｈ,采用离子电渗注射法观察荧光黄向与其接触的周围细胞的传递情况。结果：ＴＰＡ对细胞间隙连接通讯（ＧＪＩＣ）功能具有抑制作用,与空白对照组相比有显著差异（Ｐ＜ ０．０１）,单纯ＶＤＴ组对ＧＪＩＣ无抑制作用（Ｐ＞ ０．０５）,亦未见该脉冲磁场对ＴＰＡ的抑制作用有增强效应。结论：视频显示终端脉冲磁场（１５．６ ｋＨｚ）对细胞间隙连接通讯功能无直接和（或）协同ＴＰＡ的抑制作用     

中西医结合治疗成人股骨头缺血坏死120例

采用中西医结合疗法 ,经皮股骨头内减压引流、靶血管脉冲式加压药物灌注、髂内动脉部分血管栓塞灌药和口服中药治疗成人股骨头缺血坏死 12 0例。通过 12～ 36个月的随访观察 ,髋关节疼痛缓解率为 92 5 0 % ,关节活动度改变率为 96 67% ,DSA检查血管增加达 88 33% ,CT、X线片股骨头骨质改变占 5 5 83%。综合疗效优于任何单项治疗     

大剂量甲基强的松龙静脉内冲击疗法治疗顽固性巩膜炎

评估甲基强的松龙对严重顽固性巩膜炎的疗效,为治疗严重顽固性巩膜炎寻找一种理想的方法。方法：１０例严重顽固性巩膜炎患者采用静脉内大剂量甲基强的松龙冲击疗法（５００ｍｇ／日）,连续３天为一疗程,可重复几个疗程,每疗程后间隔３～４天,并逐渐减量。结果：３～４疗程后,１０例患者其平均记分由治疗前的１２．２分降低到２．４分（Ｐ＜０．０１）,病情改善者３例,治愈者７例。副反应轻微。结论：静脉内大剂量甲基强的松龙冲击疗法治疗巩膜炎疗效高、作用快、副反应轻,是一种理想的治疗方法。值得进一步总结。     

High-speed black blood imaging of vessel stenosis in the presence of pulsatile flow.

Stenosis phantoms were created to study the ability of "black blood" methods to image a vessel stenosis in the presence of pulsatile flow. Black blood images were acquired with a modified TurboFLASH (fast low-angle shot) method that eliminates flow signal by applying a set of prepulses before segmented data acquisition. With this high-speed approach, imaging can be completed within 16 seconds. This technique was compared with conventional spin-echo black blood, gradient-echo black blood, and gradient-echo bright blood methods. Loss of flow signal, which extended beyond the site of the stenosis, was seen on the gradient-echo bright blood images. The pattern of signal loss varied with the type of stenosis. Flow voids were achieved with spin-echo black blood imaging; however, substantial ghosting artifacts were seen. With gradient-echo black blood imaging, it was difficult to eliminate all flow signal, particularly for in-plane flow. The modified TurboFLASH method produced high-quality black blood images in a fraction of the time needed for spin-echo imaging. It showed no ghosting artifacts even in the presence of pulsatile flow.     

Systolic arterial pressure determination by a new pulse monitor technique

The Doppler ultrasound (DUS) technique is a widely accepted non-invasive technique to estimate systolic blood pressure (SBP) accurately in paediatric patients. The DUS has a number of limitations. A new pulse monitor, Mr Pulse (MP), operating on the principle of a finger plethysmograph, was developed to offer an alternative technique to estimate SBP. From 104 paired SBP measurements taken in 16 paediatric patients undergoing general anaesthesia, SBP determined by the MP technique correlated closely with that by the standard DUS technique (r2 = 0.98). Analysis of degree of agreement performed indicated that there was good agreement between SBP obtained by the MP and the DUS techniques. The mean +/- standard deviation of differences in paired SBP values between the two measurement techniques was 0.55 +/- 3.59 mmHg. Mr Pulse is as accurate as the DUS technique in estimating SBP and has the advantage of less critical sensor positioning as it is not subject to electrical interference. It has no electrical hazard.     

Motion artifact reduction with three-point ghost phase cancellation.

A novel method for "ghost" artifact suppression is introduced. It suppresses ghosts induced by motion in any direction, as well as other types of quasi-periodic signal modulation. Because it requires neither special hardware nor intensive data processing, it can be easily implemented on conventional magnetic resonance (MR) imagers. The method is based on the concept of decomposition of a ghosted complex image into a ghost mask and ideal image. A set of deliberately designed acquisitions are used to generate a set of ghosted complex images in which the ghost components are related in a simple manner. With use of equations describing image decomposition and ghost correlation, the ideal image can be calculated pixel by pixel. The ideal image obtained (representing the time-averaged spin-density distribution) is shown to be a truer representation of physical reality than the ghost-free image obtained with ordered phase encoding. In this technique, both interview and intraview effects are taken into account. The technique is also useful in simultaneously suppressing ghosts from multifrequency signal modulations such as respiratory and cardiac motions. The method was successfully tested with three time-interleaved, phase-encoding-order-shifted acquisitions. Experimental results have shown that it is a simple but effective technique.     

Analysis of the arterial blood pressure waveform using Fast Fourier Transform technique during left ventricular nonpulsatile assistance: in vitro study

The arterial blood pressure waveform is variable during left ventricular assistance. The aim of this study is to examine the correlation between the left ventricular assist device (LVAD) condition and the arterial blood pressure waveform in a fixed cardiac output condition using a mock circuit. This mock circulation loop was composed of an aortic compliance chamber, a left atrial compliance chamber, a pneumatic pulsatile pump as a native heart, and a rotary blood pump representing the LVAD with left atrial drainage. The Fast Fourier Transform technique was utilized to analyze the arterial blood pressure waveform and calculate the pulsatility index (PI) and the pulse power index (PPI). The PI and PPI decreased with the increase of the LVAD rotational speed, exponentially. There was a significant negative correlation between the PI, PPI, and the LVAD rotational speed, flow rate, and assist ratio. The best correlation was observed between the PPI and the assist ratio (r = 0.986). From this viewpoint, an ideal LVAD condition may be estimated from the pulsatility change of the arterial blood pressure waveform.     

中西医结合治疗急性病毒性心肌炎166例

观察生脉温胆汤加减配合西药治疗急性病毒性心肌炎的临床疗效。将249例患者随机分为治疗组166例和对照组83例。治疗组采用生脉温胆汤加减，每日1剂，水煎服。加用西药心肌营养剂。对照组采用心肌营养剂辅以抗心律失常药物治疗。两组均治疗3－6月后统计疗效。结果治疗组3月有效率31％，6月有效率92％；对照组3月有效率18％，6月有效率34．％。两组比较均有显著性差异（P＜0．05）。两组主要症状、体征、心电图恢复正常比较有显著性差异（P＜0．05）。说明生脉温胆汤加减配合西药治疗急性病毒性心肌炎效果满意。     

老年高血压患者脉压与左心室肥厚的关系

目的探讨老年高血压患者脉压(PP)与左心室肥厚(LVH)的关系。方法老年高血压患者212例,按PP水平分为<40mmHg、40～60mmHg、60～80mmHg及>80mmHg4组,分别进行心脏超声检查,计算出左室质量指数(LVMI),分析PP与LVMI的关系。结果随着PP的增大,LVMI明显增加,各组间LVMI有显著性差异(P<0.05)。结论老年高血压患者PP增大可以促进LVH的发生及发展,PP是LVH重要的危险因素及预测因子。