Monitoring lung resistivity changes in congestive heart failure patients using the bioimpedance technique.
The feasibility of a novel, dedicated system for monitoring lung resistivity in congestive heart failure patients, implementing a hybrid approach of the bioimpedance technique, was assessed in this preliminary study. Thirty-three healthy volunteers and 34 congestive heart failure patients were measured with the PulmoTrace system (CardioInspect, Tel Aviv University, Tel Aviv, Israel) during tidal respiration, and the ability to monitor the respective lung resistivity values was assessed. Mean left and right lung resistivity values of 1205+/-163 and 1200+/-165 ohm.cm for the control group and 888+/-193 and 943+/-187 ohm.cm for the congestive heart failure group were found, indicating a significant (p<2.10(-7)) difference between the two groups. The results of long-term monitoring of two patients during medical treatment are also shown. This hybrid approach system is believed to improve diagnostic capabilities and help physicians to better adjust medication dosage on a frequent basis.
Zlochiver
Sharon
S
Department of Biomedical Engineering, Tel Aviv University, Ramat Aviv, Israel.
Radai
Michal M
MM
Barak-Shinar
Deganit
D
Ben-Gal
Tuiva
T
Yaari
Vicky
V
Strasberg
Boris
B
Abboud
Shimon
S
D000368:Aged; D016022:Case-Control Studies; D015897:Comorbidity; D017097:Electric Impedance; D004867:Equipment Design; D004869:Equipment Safety; D005240:Feasibility Studies; D005260:Female; D006333:Heart Failure / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods; D011336:Probability; D011654:Pulmonary Edema / Q000175:diagnosis* / Q000453:epidemiology*; D012016:Reference Values; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index