Development of a balloon volume sensor for pulsating balloon catheters.
Development of a balloon volume sensor for pulsating balloon catheters.
复制标题
开发用于脉动球囊导管的球囊体积传感器。
DOI：
10.1097/01.mat.0000123635.20778.52
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Federspiel,WilliamJ
中科院分区：
文献类型：
--
作者：
Nolan,TimothyDC;Hattler,BrackG;Federspiel,WilliamJ
氦脉冲气球是几种心血管设备的组成部分，包括主动脉内气囊反搏(IABP)和一种新型静脉呼吸支持导管。这些设备的有效使用在临床上需要球囊充分充气和放气，而导致球囊充气不足的不当操作条件可能会减少对患者的呼吸或心脏支持。本研究的目的是扩展基本的心肺描记技术，开发一种动态测量球囊体积的系统，适用于快速搏动的球囊导管。本文开发的动态气囊体积传感器系统(DB-VSS)使用热线风速法测量从控制台到导管的驱动管路中的氦气流量，并对流量进行积分以确定每次气球脉动中输送的体积。DBVSS的一个重要组成部分是一种算法，可以在这些系统中发生氦气泄漏引起的气体成分变化时，自动检测和调整流量信号和测量的气球体积。DBVSS能够在与IABP和呼吸支持导管相关的广泛操作条件下测量实际球囊体积的5-10%范围内的球囊体积。这包括氦浓度从70%到100%的变化，脉搏频率从每分钟120到480次的变化，以及由于血管狭窄、传动系统增加或导管阻力而导致的球囊充盈减少的模拟临床条件。
Helium pulsed balloons are integral components of several cardiovascular devices, including intraaortic balloon pumps (IABP) and a novel intravenous respiratory support catheter. Effective use of these devices clinically requires full inflation and deflation of the balloon, and improper operating conditions that lead to balloon under-inflation can potentially reduce respiratory or cardiac support provided to the patient. The goal of the present study was to extend basic spirographic techniques to develop a system to dynamically measure balloon volumes suitable for use in rapidly pulsating balloon catheters. The dynamic balloon volume sensor system (DB-VSS) developed here used hot wire anemometry to measure helium flow in the drive line from console to catheter and integrated the flow to determine the volume delivered in each balloon pulsation. An important component of the DBVSS was an algorithm to automatically detect and adjust flow signals and measured balloon volumes in the presence of gas composition changes that arise from helium leaks occurring in these systems. The DBVSS was capable of measuring balloon volumes within 5–10% of actual balloon volumes over a broad range of operating conditions relevant to IABP and the respiratory support catheter. This includes variations in helium concentration from 70–100%, pulsation frequencies from 120–480 beats per minute, and simulated clinical conditions of reduced balloon filling caused by constricted vessels, increased driveline, or catheter resistance.