What is the difference between invasive ventilator and non-invasive

What is the difference between invasive ventilator and non-invasive

    The main difference between non-invasive and invasive ventilator is that non-invasive ventilator is suitable for patients with mild symptoms and illness, and the patient is clear and can cooperate and tolerate ventilator treatment; while invasive ventilator is mostly used for patients with critical illness, lethargy or coma Patient; invasive ventilator requires intubation, non-invasive ventilator does not require intubation treatment.

1. In terms of the classification of medical device management categories, non-invasive ventilators belong to the second category of medical devices, and invasive ventilators belong to the third category of medical devices (the third category is the highest level and requires a certificate issued by the State Drug Administration); the simplest way to distinguish is to look at medical Device registration certificate, whether it is Class III or Class II;

2. From the patient's perspective, the tracheal intubation (or tracheotomy) ventilation method is invasive, and the mask ventilation method is non-invasive;

3. Invasive ventilators can be connected to high-pressure oxygen; (the advantage is that it can meet the needs of severe patients with high pressure, high flow, and high oxygen concentration; disadvantages: it must be driven by oxygen, and the oxygen consumption is large;)

4. The invasive ventilator can also be used with the mask of the non-invasive ventilator, but generally the oxygen consumption is relatively large and the oxygen concentration is high, and it cannot completely replace the non-invasive ventilator;

5. Imported high-end invasive ventilators have built-in turbines and can also be connected to high-pressure oxygen, which can achieve invasive and non-invasive integration, but the price is relatively high. Nowadays, most mainstream emergency ventilators on the market still use oxygen (including imported ones). 

6. Therefore, invasive emergency ventilator can be divided into: with built-in turbine (only imported high-end machines have) and without turbine (mainstream are of this kind)

7. The non-invasive ventilator has a built-in turbine, which can be used without an oxygen source; (Disadvantages: only indirect low-pressure and low-flow oxygen through the mask or breathing circuit, the pressure and oxygen flow are too low, and the oxygen in critically ill patients does not enter the patient The lungs will cause low blood oxygen;)

8. After adding a platform valve in the middle of the non-invasive ventilator pipeline, it can be used as an invasive ventilator. It does not require high pressure, low oxygen concentration, and low flow requirements for some invasive patients that can be used for a short time, but they are severely ill. Patients, demanding patients are not easy to use;

    Non-invasive positive pressure ventilation refers to a positive pressure mechanical ventilation method that does not need to establish an artificial airway. Clinically, oral-nasal masks or nasal masks are often used for positive pressure ventilation. In addition, full-face masks and nasal congestion are also used for NPPV treatment. Invasive positive pressure ventilation refers to a positive pressure mechanical ventilation method by establishing an artificial airway (tracheal intubation through the nose or mouth, tracheotomy). Compared with invasive ventilation, non-invasive ventilation has the characteristics of simple setup, easy acceptance by patients, and less prone to secondary lung injury and pulmonary infection. However, it also has poor human-machine synchronization, unstable tidal volume, and is not conducive to airway secretion drainage. And other shortcomings. Therefore, you can't compare which one is better, you should see which one is more suitable for you. However, there are still some differences between the two. The working principle of the invasive ventilator is an artificial mechanical ventilation device to assist or control the patient's voluntary breathing movement to achieve the function of gas exchange in the lungs, reduce the consumption of the human body, and facilitate the recovery of respiratory function. The working principle of the non-invasive ventilator is that the ventilator presses air into the human lungs through a certain high pressure when inhaling, and the machine gives a lower pressure when exhaling, so that the CO2 is discharged from the face mask through the mouth or nose. The stomata are expelled from the body to complete a breath.