Background. Goal-directed fluid therapy reduces morbidity and mortality in various clinical settings. Respiratory variations in photoplethysmography are proposed as a noninvasive alternative to predict fluid responsiveness during mechanical ventilation. This paper aims to critically evaluate current data on the ability of photoplethysmography to predict fluid responsiveness. Method. Primary sea...

The ability to provide non-contact monitoring of blood perfusion, in patients susceptible to diseases such as diabetic foot, is exceptionally useful in a clinical setting. Recently, this has become achievable through a widely-used technique known as photoplethysmography. After extensively reviewing the literature on clinical applications for photoplethysymography, we began to explore the potent...

BACKGROUND Photoplethysmography with a digital sensor (ClearSight, Edwards Lifesciences, Irvine, CA, USA) connected to a dedicated monitor (EV 1000, Edwards Lifesciences) was recently proposed for use in performing hemodynamic optimization during surgery. The objective of this study is to evaluate the effect of photoplethysmography on the incidence of postoperative complications compared with t...

Photoplethysmography is a simple way for heart rate detection. However due to low level of detected signal, easily prone to motion artifacts and noise. In this paper DWT method is used to reduce the effect of noise, thereby calculate the heart rate. A comparative study of detecting heart rate using different mother wavelet is also discussed. Keywords— Heart beats, ECG, Photoplethysmography, Pea...

Photoplethysmography is a method to visualize the variation in blood volume within tissues with light. The signal obtained has been used for monitoring of patients, interpretation diagnosis or extracting other physiological variables (e.g., pulse rate and oxygen saturation). However, photoplethysmography can be perturbed by external factors. Implementing methods evaluate quality allows one avoi...

[Reflection on human suffering is a formative factor in the development of the theology of Schillebeeckx. The dynamic of "negative contrast experience" is significant not only for his approach to suffering but for his method of doing theology in the face of the world's suffering. Schillebeeckx dialectically incorporates the reality of suffering into the construction of a theology that neverthel...

BACKGROUND Although photoplethysmography and cerebral state index (CSI) have been used as indices in monitoring vital signs perioperatively, there are only a few reports comparing the performance of photoplethysmography with CSI in monitoring anaesthesia depth. The aim of the present study was to clarify features of photoplethysmography in monitoring balanced general anesthesia compared with CS...

background & objective: reduced blood flow due to obstruction in most cases is as a primary factor in pressure ulcer formation and create of bedsore. the aim of this study is design and manufacture a care system tissue under pressure based on variation blood flow at different depths in the tissue. material & methods: in manufacture of system two infrared light transmitter were located between o...

Pulse oximetry is based on the technique of photoplethysmography (PPG) wherein light transmitted through tissues is modulated by the pulse. In addition to variations in light modulation by the cardiac cycle, the PPG signal contains a respiratory modulation and variations associated with changing tissue blood volume of other origins. Cardiovascular, respiratory, and neural fluctuations in the PP...