The principle of pulse oximetry is applied to the abdomen of a pregnant woman, such that the measured signal includes both, the maternal and the fetal pulse curve. One of the major challenges is to extract the shape of the fetal pulse curve from the mixed signal for computation of the ...
This optimal combination is shown to remain stable, even when the signals are very noisy; results remain accurate with noise levels that can be 3 orders of magnitude higher than what the ratio-of-ratios method, used in conventional pulse oximetry, allows. Additionally, the spatial redundancy of...
This area is rapidly expanding in its importance with many modern diagnostic techniques attempting to gain valuable information by shining (laser) light at appropriate areas. A somewhat related application is pulseoximetrywhere the transmission of light through a tissue at differing wavelengths, usually ...
conventional pulse oximetry, allows. Additionally, the spatial redundancy of the camera is exploited to further reduce the influence of artifacts on the measurement by using multi-site measurements. This improvement is shown to be exclusively applicable to the new principle, since the increased noise ...
quantitated by microscopic investigations of punch biopsies (Pappas et al, 1997), video-capillaroscopy (capillary density) (Stücker et al, 1995;Steins et al, 1999), laser Doppler flow (blood flow velocity), or by pulse oximetry (oxygen saturation) (Mannheimer et al, 1997;Bilz et al, ...
Manipulation of power utilization in the Indian domestic household is done through technicalities to maximize economy. The manipulation allows for subsidie... S Ajith,MK Srilekha,A Rohithsai,... - 《Materials Today Proceedings》 被引量: 0发表: 2021年 Simplified open HW /SW pulse oximetry interfac...
Left-to-right atrial shunting was detected by TEE in 33 patients (92%) and by oximetry in 11 patients (31%). The radius r of FCR was measured from the first aliasing limit, at a Nyquist velocity reduced to 11 cm/sec by zero-shifting, to the orifice in the atrial septum. FCR was ...
Methods The system based on the Fick principle uses measurements of oxygen consumption taken by a metabolic monitor and of arterial and mixed venous oxygen saturation taken by pulse- and fiberoptic oximetry to calculate cardiac output every 20 s. Interventions In every patient one pair of ...
Optical coherence tomography (OCT) is a non-invasive technique for cross-sectional tissue imaging. It typically uses light in the near-infrared spectral range which has a penetration depth of several hundred microns in tissue. The backscattered light is
Transabdominal fetal pulse oximetry is an approach to measure oxygen saturation of the unborn child non-invasively. The principle of pulse oximetry is applied to the abdomen of a pregnant woman, such that the measured signal includes both, the maternal and the fetal pulse curve. One of the majo...