Abstract
Background: The VOCSN (Ventilator, Oxygen, Cough, Suction, and Nebulizer) is a ventilator classified as a critical care ventilator and is also used as a home ventilator. The VOCSN is compatible as an invasive, noninvasive, and mouthpiece ventilator. This study was to evaluate the performance of the VOCSN, in PC AC, compared to the Philips Respironics V60 in PCV.
Methods: To evaluate each ventilator, the IngMar Medical ASL 5000 Electronic Breathing Simulator (ASL 5000) was used. The ASL 5000 was used to trigger breaths and simulate patient lung mechanics for three different lung models: Normal, COPD and ARDS. Lung models were set as follows, Normal: resistance inspiratory 13 cm H2O/L/s, resistance expiratory 12 cm H2O/L/s, static compliance 54 mL/cm H2O, spontaneous rate 10 breaths/min and Pmus 8 cm H2O; COPD: resistance inspiratory 22 cm H2O/L/s, resistance expiratory 18 cm H2O/L/s, static compliance 59 mL/cm H2O, spontaneous rate 10 breaths/min and Pmus 8 cm H2O; ARDS: resistance inspiratory 12 cm H2O/L/s, resistance expiratory 14 cm H2O/L/s, static compliance 39 mL/cm H2O, spontaneous rate 10 breaths/min and Pmus 8 cm H2O. The mode on the VOCSN was PC AC; the mode on the Phillips V60 was PCV without autotrak. Each mode, at each disease state, was run on the ASL 5000 for at least 3 min. The settings were as follows: set inspiratory pressure 10 cm H2O, set PIP 20 cm H2O, PEEP 10 cm H2O, inspiratory time 1 s and respiratory rate 5 breaths/min.
Results: The time to trigger, as noted in the table, shows that the VOCSN has a prolonged time to trigger compared to the V60. Peak pressure, PEEP and PEEPtot were all relatively comparable and did not fluctuate much from each other. Inspiratory tidal volumes were smaller on the VOCSN in comparison to the V60, with the largest difference amongst all patient scenarios of 102 (mL). Time to Pmin after the start of inspiratory effort was delayed more on the VOCSN than the V60. Maximum pressure drop during trigger was greater on the VOCSN than the V60, indicating a greater effort to trigger on the VOCSN compared to the V60.
Conclusions: There are similarities and differences between the two ventilators, as is true with most ventilators. It is important to monitor the patient and the ventilator closely to ensure proper ventilation is being administered. Each ventilator function has its purpose for individual needs of patients in the hospital and in the home. It's imperative that the clinician meets the needs of the patient effectively and efficiently.
Footnotes
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