Factors that do not affect the peak airway pressure in v cv mode

The factors that do not affect the peak pressure of airway in v cv mode are: airway length, airway shape, airflow speed and airflow category.

Vcv is volume controlled ventilation (vcv): in this mode, tidal volume (VT), respiratory frequency (RR), inspiratory expiratory ratio (I/E) and inspiratory flow rate are completely controlled by the ventilator. Its characteristics are: it can ensure the supply of tidal volume and ventilation per minute, completely replace spontaneous breathing, which is beneficial to respiratory muscle rest, but not conducive to respiratory muscle exercise.

In addition, because all parameters are artificially set, man-machine confrontation is easy to occur. Suitable for restless ARDS patients, patients with shock and acute pulmonary edema.

At present, the most commonly used ventilation mode is volume control ventilation mode (VCV), which has potential risks and may lead to patient crush. Because of this risk, the pressure control mode (PCV) is regarded as an option for endoscopic surgery. PCV can reduce the risk of pressure injury, but it may also increase the risk of insufficient ventilation or excessive ventilation.

This is why more research will focus on the pressure control-capacity assurance (PCV-VG) mode in the future, which combines the advantages of the capacity control mode (VCV) and the pressure control mode (PCV) and reduces the risks of the two modes respectively.

Here we will discuss the unique challenges of laparoscopic surgery and the advantages of PCV-VG compared with VCV. At the same time, we will also look at the existing research status of PCV-VG as the best ventilation strategy for laparoscopic surgery.