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General Principles for Measuring Arterial Waves
Published in Wilmer W Nichols, Michael F O'Rourke, Elazer R Edelman, Charalambos Vlachopoulos, McDonald's Blood Flow in Arteries, 2022
Electrical cardiometry is a noninvasive method similar to impedance cardiography, in that both methods measure thoracic electrical bioimpedance. Four standard ECG electrodes are required for measurement of CO. Electrical cardiometry is a method trademarked by Osypka Cardiotronic Inc. and shows promising results in a wide range of patients (it is currently U.S. market approved for use in adults, pediatrics and neonates). Electrical cardiometry monitors have shown promise in postoperative cardiac surgical patients (both hemodynamically stable and unstable) (Funk et al., 2009). The most recent use of the electrical cardiometry monitor has been in neonates, infants and children (Song et al., 2014; Hsu et al., 2017; Altamirano-Diaz et al., 2018a, 2018b). The ICON monitor used by Altamirano-Diaz et al. (2018b) is the first and only portable battery-operated cardiac output monitor available in the world.
Intravenous lidocaine for attenuation of pressor response after endotracheal intubation. A randomized, double-blinded dose-finding study
Published in Egyptian Journal of Anaesthesia, 2023
Hanan M. Mostafa, Rana Walaa Ibrahim, Ahmed Hasanin, Nadia Yousef Helmy, Amr Abdel Nasser Mahrous
Somato-visceral reflexes are thought to be the mechanism behind the pressor response, which is a reaction to laryngoscopy and orotracheal intubation [1]. When proprioceptors at the base of the tongue are stimulated during a laryngoscopy, systemic blood pressure, heart rate (HR), and plasma catecholamine concentrations rise in an impulse-dependent manner. Following oro-tracheal intubation, more receptors are recruited, increasing the hemodynamic and epinephrine responses as well as some vagal heart inhibition [2]. The related cardiovascular complications could be serious in patients with cardiac comorbidities [3–5]. Although the value of lidocaine during induction of anesthesia was well investigated, the optimum dose for lidocaine as an adjuvant to induction agents is not known. Previous reports had investigated different doses of lidocaine varying between 1 mg/Kg to 2 mg/Kg [6–8]. However, no studies to the best of our knowledge had compared different doses of lidocaine. Qi et al [9] had reported that lidocaine is an effective agent in attenuation of pressor response for ETI; however, they suggested that the optimum dose needs further research. Electrical cardiometry is recently introduced for assessment of many cardiovascular variables and continuously applicable method of cardiac output (CO), stroke volume (SV), and other hemodynamic parameters monitoring. Its use is growing because it is non-invasive, shows reliability in CO measurements and can be used as a continuous bedside monitor.
Comparative Study Between Desflurane and Sevoflurane Regarding Haemodynamics and Recovery Profiles in Obese Patients Undergoing Laparoscopic Sleeve Gastrectomy
Published in Egyptian Journal of Anaesthesia, 2023
Sara Mahmoud Afifi Ahmed, Said Mohamed El-Medany Aly, Hesham Ahmed Fouad Shaaban, Kareem Mahmoud Fathi Ateba
In OR, all patients were attached to a multichannel monitoring (GE, Datex-Ohmeda, S/5 Instrumentation Corp., Helsinki, Finland), as non‑invasive blood pressure (NIBP), pulse oximetry (SpO2), ECG and neuromuscular monitoring. A spectral entropy was used to monitor the depth of anaesthesia. A gas analyzer (GE Avance CS2) was applied to measure end-tidal desflurane or sevoflurane (%) as well as end-tidal carbon dioxide (ETCO2) in mm Hg. Electrical cardiometry (ICON, Osypka Medical, Berlin, Germany) was used for non-invasive cardiac output and cardiac index monitoring.
Goal Directed Fluid Therapy based on Stroke Volume Variation and Oxygen Delivery Index using Electrical Cardiometry in patients undergoing Scoliosis Surgery
Published in Egyptian Journal of Anaesthesia, 2021
Islam Hassan Omar, Ahmed Saied Okasha, Ahmed Mansour Ahmed, Rabab Saber Saleh
Electrical cardiometry is a method for the non-invasive determination of stroke volume [17], CO, and other hemodynamic parameters in adults, children, and neonates. It has been validated against “gold standard” methods such as thermodilution and is a proprietary method trademarked by Cardiotronic, Inc. [18] It calculates stroke volume [17] by analyzing the maximal rate of change in the resistance of blood flow during systole [19].