Cardio2 system

Manufactured by MedGraphics

Sourced in United States

The CardiO2 System is a diagnostic device designed to measure and analyze respiratory and cardiac functions. The system provides comprehensive data on oxygen uptake, carbon dioxide production, and other key physiological parameters.

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CardiO2/CP system Cardio2

2 protocols using cardio2 system

Cardiopulmonary Exercise Testing Protocol

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A maximal incremental cycle ergometer protocol was conducted in accordance with the ATS recommendations¹⁸ using a CardiO₂ System^® (MedGraphics). The following parameters were determined: oxygen uptake (VO₂; mL·min^-1); carbon dioxide output (VCO₂; mL·min^-1); respiratory exchange ratio; minute ventilation (V_E, L·min^-1); tidal volume (V_T, mL); and RR (breaths/min). The mean VO₂ for the last 15 seconds of the ramp was considered as the peak oxygen uptake (VO_2peak). During the test, 12-lead electrocardiography, blood pressure, and pulse oximetry values were monitored. In addition, dyspnea and leg fatigue were assessed by the modified Borg scale every two minutes.¹⁹Dynamic relationships were determined to evaluate metabolic (∆VO₂/∆workload [W]; mL·min^-1·W^-1), cardiovascular (∆HR/∆VO₂; beats·min^-1·L·min^-1), and respiratory (∆V_E/∆VCO₂; L·min^-1·L·min^-1) responses, as previously described.²⁰ Ventilatory reserve was calculated using the V_E at exercise cessation/maximal voluntary ventilation ratio as a reference.

Suesada M.M., Carvalho H.D., de Albuquerque A.L., Salge J.M., Stuart S.R, & Takagaki T.Y. (2018). Impact of thoracic radiotherapy on respiratory function and exercise capacity in patients with breast cancer. Jornal Brasileiro de Pneumologia, 44(6), 469-476.

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Standardized Cardiopulmonary Testing for Rehabilitation

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Standardized cardiopulmonary testing was performed after the muscular strength assessment and after allowing patients to rest for 30 minutes to 1 hour. A modified Bruce protocol was used for treadmill exercise testing as outlined previously [16 , 17 (link)]. Heart rate and peak VO₂ were determined throughout testing, as described elsewhere [9 (link), 16 ]. We used the Medgraphics CardiO₂ system (St. Paul, MN, USA) to perform continuous breath-by-breath analyses, which relied on inspired and expired gases, flow, and volume. Initial treadmill speed was set at 1.7 miles/hour, and incline was set at 0%. Patients were strongly encouraged to finish 3-minute stages. Once patients reached their peak volitional effort, the testing was stopped. Both heart rate and peak VO₂ were used to determine the intensity target for rehabilitation exercises. Further analysis of peak VO₂ was performed to adjust for lean body mass. Analysis of peak VO₂ as a function of lean body mass has been shown to give a better representation of actual cardiopulmonary fitness [18 , 19 (link)].

Clayton R.P., Wurzer P., Andersen C.R., Mlcak R.P., Herndon D.N, & Suman O.E. (2016). EFFECTS OF DIFFERENT DURATION EXERCISE PROGRAMS IN CHILDREN WITH SEVERE BURNS. Burns : journal of the International Society for Burn Injuries, 43(4), 796-803.

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