局麻药注入蛛网膜下腔的流体力学分析

腰麻或硬腰联合麻醉已成为当前最安全的区域麻酵方式之一。在实施腰麻过程中，通常麻醉医生除了关注药物的比重以外。很少有人研究腰麻的注药会对麻醉效果产生影响。腰麻中。麻醉的起效时间．局麻药作用时间、麻醉平面的高低等，除了与药物的比重有很大关系外，还与腰麻穿刺针孔的朝向、注药的速度．脑脊液的性质．以及间断或持续注入等有极大的关系。如果在了解这些影响因素时引入流体力学的概念，来说明注入药物对麻醉效果的影响，并寻找一定的规律，对指导腰麻的实施将会有很大帮助。

Hydrodynamics Analysis of Local Anaesthetics Injected into Subarachnoid Space

Lumbar anesthesia or epidural and subarachnoid anesthesia has become the most secure one of the regional anesthesia. Usually anesthesiologists are concerned about the specific gravity of drugs outside the few studies about the effect of the injection manner to anesthesia in lumbar anesthesia when they executed lumbar anesthesia. The fundamental aspect in lumbar anesthesia such as the anesthesia onset time, duration of local anesthetics and level of anesthesia had a great relationship with the spinal puncture pinhole toward, injection speed, nature of cerebrospinal fluid and intermittent or continuous injection in addition to the specific gravity of drug. It would be of great help. If you used the concept of fluid mechanics to explain the effect of drug injection to anesthesia and to find some law to guide the implementation of spinal anesthesia. The so-called fluid mechanics is a mechanical branch, major researching about interaction between the state of the fluid itself, fluid and solid wall, fluid and fluid, the fluid and other movement forms. The first is to establish a ＂mechanical model＂, that is, we should analysis of the various conflicts and tackle the main aspects for practical fluid mechanics problems, simplified and establish a ＂mechanical model＂ to reflect the nature of the problem. The most commonly used basic fluid mechanics concepts： fluid, flow tube, jet, density, viscosity, internal friction, weight, total flow, the effective cross-section, flow and average flow rate.