title: [Monitoring of the SaO2 and photoplethysmography in chronic disease].
abstract: Non-invasive monitoring of some vital parameters can improve the management of chronic diseases resulting an important increasing of quality of life. Today the high number of the patients, suffering of chronically diseases, put a big pressure to the health system with their demand for homecare monitoring.
  
  
  METHODS
  In this paper are presented the design of the wearable medical device for long term monitoring of pulse wave and SaO2 using a probe that includes two light emitting diodes (LEDs), one in the visible red spectrum (660 nm) and the other in the infrared spectrum (940 nm). The device stores all the data on SD memory card for post processing.
  
  
  RESULTS
  The monitoring device is built using an ultra low power microcontroller that offers the advantage of high integration of some circuits. The custom made electronic boards used for signal acquisition are also included modules for storage device (SD/MMC card). The pulse wave was processed in MATLAB for calculate the second derivative of photoplethysmogram as an indicator of the hardness of the blood vessel.
  
  
  CONCLUSIONS
  The work was focused on design and implementation of an ultra low power wearable device able to acquire the pulse wave, causing minimal discomfort and allowing high mobility.
authors.affiliation: Facultatea de Bioinginerie Medicală, Disciplina Instrumentaţie Biomedicală, Universitatea de Medicină si Farmacie Gr.T. Popa Iaşi.
authors.forename: R
authors.initials: R
authors.lastname: Ciorap
authors.forename: C
authors.initials: C
authors.lastname: Corciovă
authors.forename: D
authors.initials: D
authors.lastname: Andritoi
authors.forename: M
authors.initials: M
authors.lastname: Turnea
authors.forename: D
authors.initials: D
authors.lastname: Zaharia
mesh_terms: D002908:Chronic Disease; D004867:Equipment Design; D006339:Heart Rate; D006699:Home Care Services; D006801:Humans; D008432:Mathematical Computing; D018670:Monitoring, Ambulatory / Q000295:instrumentation* / Q000379:methods; D010092:Oximetry; D010100:Oxygen / Q000097:blood*; D010101:Oxygen Consumption; D017156:Photoplethysmography / Q000379:methods; D011788:Quality of Life; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted
chemical_list: D010100:Oxygen