Pulse oximetry:: An improved in vitro model that reduces blood flow-related artifacts

被引：13

作者：

Edrich, T ^{[1
]}

Flaig, M ^{[1
]}

Knitza, R ^{[1
]}

Rall, G ^{[1
]}

机构：

[1] Univ Hosp Grosshadern Munich, Dept Obstet Gynecol, Perinatol Lab, D-81377 Munich, Germany

来源：

IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING | 2000年 / 47卷 / 03期

关键词：

artifacts; in vitro model; pulse oximetry;

D O I：

10.1109/10.827294

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Artifacts mag occur in many in vitro models of pulse oximetry due to the optical effects of synchronously oriented and/or deformed erythrocytes. Although these artifacts are most likely negligible in living superficial tissues, these are demonstrated to have considerable influence on the calibration curve obtainable from the in vitro simulation of pulse oximetry in such models, especially at low oxygen saturations. Therefore, we have del eloped a modified in vitro model which reduces the effect of these artifacts. This is achieved by excluding data obtained during pressure transients and by raising the blood flow velocity As a result, the model more closely approximates in vivo pulse oximetry, particularly under clinically important conditions of low blood oxygen saturation levels.

引用

页码：338 / 343

页数：6