scholarly journals Technical note for post processing of jugular venous pulse, central venous pressure and velocity trace

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Valentina Tavoni
Keyword(s):  
Central Venous Pressure ◽  
Venous Pressure ◽  
Pulse Velocity ◽  
Technical Note ◽  
Post Processing ◽  
Central Venous ◽  
Jugular Veins ◽  
Clinical Images ◽  
Imagej Software ◽  
Venous Pulse

In this paper an original reasoning about the post processing elaboration of medical studies is presented. The aim is to suggest a method to extrapolate numerical information from clinical images. The here described elaboration is referred to ultrasound examination of internal jugular veins and central venous pressure (CVP) measures. Firstly, the operator has to collect clinical images following precise indications, then specific techniques are applied to analyze the stored data and extrapolate quantifiable measures. Analyzing the studies with ImageJ software, jugular venous pulse, velocity, CVP and electrocardiogram traces can be drown in detail. Then, significant details can be highlighted using Matlab software. Finally, using R software, the traces can be cropped, aligned and synchronized together. The obtained results allow the operator to compare different kinds of traces of the same subject, or the same type of traces between a particular group of subjects. Before using these contents, everyone is invited to verify the accuracy of assumptions, calculations and conclusions.

scholarly journals Spectral characteristics of the internal jugular vein and central venous pressure pulses: a proof of concept study

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Clive Beggs ◽  
Valentina Tavoni ◽  
Erica Menegatti ◽  
Mirko Tessari ◽  
Riccardo Ragazzi ◽  
...  
Keyword(s):  
Central Venous Pressure ◽  
Venous Pressure ◽  
Spectral Characteristics ◽  
Inverse Correlation ◽  
Proof Of Concept ◽  
Central Venous ◽  
Jugular Veins ◽  
Cross Sectional ◽  
Concept Study ◽  
The Impact

In this proof-of-concept study the impact of central venous pressure (CVP) on internal jugular veins cross-sectional area (CSA) and blood flow time-average velocity (TAV) was evaluated in eight subjects, with the aim of understanding the drivers of the jugular venous pulse. CVP was measured using a central venous catheter while CSA variation and TAV along a cardiac cycle were acquired using ultrasound. Analysis of CVP, CSA and TAV time-series signals revealed TAV and CSA to lag behind CVP by on average 0.129 s and 0.138 s, with an inverse correlation between CSA and TAV (r= –0.316). The respective autocorrelation signals were strongly correlated (mean r=0.729-0.764), with mean CSA periodicity being 1.062 Hz. Fourier analysis revealed the frequency spectrums of CVP, TAV and CSA signals to be dominated by frequencies at approximately 1 and 2 Hz, with those >1 Hz greatly attenuated in the CSA signal. Because the autocorrelograms and periodograms of the respective signals were aligned and dominated by the same underlying frequencies, this suggested that they are more easily interpreted in the frequency domain rather than the time domain.

scholarly journals Central venous pressure estimation from ultrasound assessment of the jugular venous pulse

PLoS ONE ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. e0240057
Author(s):  
Paolo Zamboni ◽  
Anna Maria Malagoni ◽  
Erica Menegatti ◽  
Riccardo Ragazzi ◽  
Valentina Tavoni ◽  
...  
Keyword(s):  
Central Venous Pressure ◽  
Venous Pressure ◽  
Central Venous ◽  
Ultrasound Assessment ◽  
Pressure Estimation ◽  
Venous Pulse

Variability in the establishment of an external reference point for central venous pressure measurement in children

2006 ◽  
Vol 0 (0) ◽  
Author(s):  
Aline S. C. Belela ◽  
Mavilde L. G. Pedreira ◽  
Maria Angélica S. Peterlini ◽  
Denise M. Kusahara ◽  
Werther B. Carvalho ◽  
...  
Keyword(s):  
Central Venous Pressure ◽  
Pressure Measurement ◽  
Reference Point ◽  
Venous Pressure ◽  
Central Venous ◽  
External Reference

Central venous pressure monitoring in critical care settings

2021 ◽  
Vol 30 (4) ◽  
pp. 230-236
Author(s):  
Barry Hill ◽  
Catherine Smith
Keyword(s):  
Critical Care ◽  
Central Venous Pressure ◽  
Right Atrium ◽  
Venous Pressure ◽  
Vena Cava ◽  
Alternative Methods ◽  
Haemodynamic Monitoring ◽  
Haemodynamic Instability ◽  
Central Venous ◽  
The Right

Patients who present with acute cardiovascular compromise require haemodynamic monitoring in a critical care unit. Central venous pressure (CVP) is the most frequently used measure to guide fluid resuscitation in critically ill patients. It is most often done via a central venous catheter (CVC) positioned in the right atrium or superior or inferior vena cava as close to the right atrium as possible. The CVC is inserted via the internal jugular vein, subclavian vein or via the femoral vein, depending on the patient and their condition. Complications of CVC placement can be serious, so its risks and benefits need to be considered. Alternative methods to CVC use include transpulmonary thermodilution and transoesophageal Doppler ultrasound. Despite its widespread use, CVP has been challenged in many studies, which have reported it to be a poor predictor of haemodynamic responsiveness. However, it is argued that CVP monitoring provides important physiologic information for the evaluation of haemodynamic instability. Nurses have central roles during catheter insertion and in CVP monitoring, as well as in managing these patients and assessing risks.

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