居家即時心率與血氧濃度量測系統

Home Care Real-Time Heart Rate and Oxygen Saturation Measurement System

陳禾秉(Ho-Ping Chen)

指導教授 ： 蔡正倫

中原大學/工學院/醫學工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000129

摘要

本研究利用筆記型電腦配合一個光電式探頭，製作成一套成本低廉、方便居家使用的生理訊號監測系統，以供心跳速率及血氧濃度的即時測量，也可進行長時間的連續紀錄，並可評估心臟循環系統功能。手指頭的光脈動訊號被光電式探頭所檢測後，將訊號經由音源輸入端送入電腦，再透過內建音效卡做類比與數位的轉換，最後利用電腦的高速運算能力完成訊號處理分析，由於使用電池做為系統之電力來源，所以符合醫療器材的電性安全規範。與一般市售光脈式血氧濃度計進行的系統驗證測量比較，結果顯示兩者所得到的心率變化曲線幾乎完全重疊，而血氧濃度的數值則相差在±2%之內。對六位正常的受測者所進行的登階運動實驗和非最大運動量實驗結果顯示，體適能優異的受測者有較低的靜態心率和較快的心率恢復，而以此系統所做的長時間睡眠連續監測，可以準確記錄下睡眠時的心率與血氧濃度變化，故可應用在居家的醫療照護上。

關鍵字

即時量測 ； 心率 ； 血氧濃度 ； 長時間監測

並列摘要

In this study, a notebook computer and an electro-optical sensor were used to develop a low-cost physiological signal monitoring system for home care usage. It can measure heart rate and oxygen saturation in real time, and carries out a long term recording for evaluating the cardiopulmonary function.The light pulse signal through finger tip is detected by a photoelectric probe. The signal is sent into computer through the line-in port. The analog-to-digital convertor of sound board digitizes the signal for further processing by notebook computer. The computer can only use battery as the power supply to fulfill the electrical safety requirement. The comparison with a commercial pulse oximeter shows the heart rate traces of two machines are consistent. The difference of oxygen saturation values are within ±2%.The results of step exercise test and sub-maximal exercise test on six normal subjects show that those who have better physical fitness have lower resting heart rate and faster heart rate recovery. The long term monitoring test during sleep is able to accurately record the variation of heart rate and oxygen saturation. These functions make it suitable for home care usage.

並列關鍵字

real-time measurement ； heart rate ； oxygen saturation ； long term monitor

參考文獻

[10] Gerhard-Paul Diller, Konstantinos Dimopoulos, Darlington Okonko, Anselm Uebing, Craig S. Broberg, Sonya Babu-Narayan, Stephanie Bayne, Philip A. Poole-Wilson, Richard Sutton, Darrel P. Francis, and Michael A. Gatzoulis, “Heart rate response during exercise predicts survival in adults with congenital heart disease,” Journal of the American College of Cardiology, 48, 1250-1256, 2006.

[32] Marc K. Lahiri, Prince J. Kannankeril and Jeffrey J. Goldberg, “Assessment of autonomic function in cardiovascular disease: physiological basis and prognostic implications,” Journal of the American College of Cardiology, 51, 1725-1733, 2008.

[3] Paul D. Mannheimer, Machael E. Fein and James R. Casciani, “Physio-optical considerations in the design of fetal pulse oximetry sensors,” European journal of obstetrics, gynecology and reproductive biology, 72, S9-S19, 1997.

[5] James E. Sinex, “Pulse oximetry: principle and limitations,” The American journal of emergency medicine, 17, 59-67, 1999.

[6] John W. Severinghaus, “Takuo Aoyagi: discovery of pulse oximetry,” Anesthesia and analgesia, 105, S1-S4, 2007.