Plethysmography: the new wave in haemodynamic monitoring – a review of clinical applications

Photoplethysmography allows for monitoring pulse rate in patients with (possible) heart rate/pulse rate dissociation (pacemaker dependency, pulsatile ventricular assist device); monitoring sudden changes in heart beat volume, which are unrelated to respiration (pulseless electrical activity, pulsus alternans); and monitoring respiratory-dependent fluctuations of the plethysmographic wave (heart failure, hypovolaemia, asthma, upper airway obstruction, pericardial effusion). Deterioration, slowly evolving over time, may be detected by this method.

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“…cardiomyopathies, aortic stenosis). Plethysmography clearly demonstrates this phenomenon (case 4) [13].…”

Section: (Ejection Fraction 30% Central Venous Oxygen Saturation 54%mentioning

confidence: 76%

Clinical applications of photoplethysmography in paediatric intensive care

2007

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“…One of them is the pNN50, the ratio of successive intervals which differ by more than 50 ms and the total number of RR intervals. The other one is the root mean square successive difference (rMSSD) of the RR intervals [5,13].…”

Section: Signal Processingmentioning

confidence: 99%

“…Photoplethysmography is a current, simple, non-invasive method for monitoring cardiac function [1][2][3][4][5]. Although it can't be used directly to get the absolute blood pressure, the heart beats can be detected regularly.…”

Section: Introductionmentioning

confidence: 99%

Low-cost photoplethysmograph solutions using the Raspberry Pi

Nagy

Gingl

2013

2013 IEEE 14th International Symposium on Computational Intelligence and Informatics (CINTI)

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Photoplethysmography is a prevalent, non-invasive heart monitoring method. In this paper an implementation of photoplethysmography on the Raspberry Pi is presented. Two modulation techniques are discussed, which make possible to measure these signals by the Raspberry Pi, using an external sound card as A/D converter. Furthermore, it is shown, how can digital signal processing improve signal quality. The presented methods can be used in low-cost cardiac function monitoring, in telemedicine applications and in education as well, since cheap and current hardware are used. Full documentation and open-source software for the measurement available: http://www.noise.inf.u-szeged.hu/Instruments/raspberryplet/Comment: 14th IEEE International Symposium on Computational Intelligence and Informatics (CINTI 2013), November 19-21, 2013, Budapest, Hungar

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“…Several methods have been in the past fifty years for the study of PWV, such as hot-wire sphygmography, impedance plethysmography, applanation tonometry, and recording the pulse wave using crystal microphones [87, 88]. While both sphygmography and plethysmography can be used for monitoring the pulse wave and its regularity, plethysmography can offer more technical usages including: peripheral oximetry, blood pressure monitoring and assessment of the adequacy of peripheral circulation as derived from the Allen's test [89]. In the 1960s Simmons and his colleagues applied a strain gauge plethysmograph to one digit and with the help of an amplified electrocardiogram recorded the resistance change caused by entrance of blood into that digit.…”

Section: Modern Medicinementioning

confidence: 99%

A Brief Journey into the History of the Arterial Pulse

Ghasemzadeh

Zafari

2011

Cardiology Research and Practice

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Objective. This paper illustrates the evolution of our knowledge of the arterial pulse from ancient times to the present. Several techniques for arterial pulse evaluation throughout history are discussed. Methods. Using databases including Worldcat, Pubmed, and Emory University Libraries' Catalogue, the significance of the arterial pulse is discussed in three historical eras of medicine: ancient, medieval, and modern. Summary. Techniques used over time to analyze arterial pulse and its characteristics have advanced from simple evaluation by touch to complex methodologies such as ultrasonography and plethysmography. Today's understanding of the various characteristics of the arterial pulse relies on our ancestors' observations and experiments. The pursuit of science continues to lead to major advancements in our knowledge of the arterial pulse and its application in diagnosis of atherosclerotic disease.

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Plethysmography: the new wave in haemodynamic monitoring – a review of clinical applications

Cited by 16 publications

References 11 publications

Clinical applications of photoplethysmography in paediatric intensive care

Clinical applications of photoplethysmography in paediatric intensive care

Low-cost photoplethysmograph solutions using the Raspberry Pi

A Brief Journey into the History of the Arterial Pulse

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