The bionic cough simulator is applied to patients with invasive mechanical ventilation. It assists patients with effective expectoration by simulating actual coughing mechanism of human being. The unique air path and algorithm design provide seamless compatibility with ventilators. Features of the bionic cough simulator include avoidance of injury, more effective sputum drainage, and automated operation.
Coughing is a protective respiratory reflex of human that serves the purpose of cleaning up secretions or foreign matters in respiratory tract. After a complete inspiration cycle is delivered by the ventilator to a patient receiving invasive ventilation, the bionic cough simulator will be activated immediately. By simulating the coughing mechanism of human being, it generates a brief and large air flow, which enables direct drainage of sputum out of the human body from the main airway and bronchi in an expiration cycle. The unique design of airway and algorithm ensures synchronous operation with the mechanical ventilation system without interfering with normal function of the ventilator.
Expectoration is one of the main nursing tasks for patients with mechanical ventilation. Effective expectoration is the key to prevent airway obstruction and maintain the success of mechanical ventilation. Ventilator-associated pneumonia（VAP） is the most common and fatal complication in mechanical ventilation patients with a incidence of 43.1%, a mortality rate of 51.6%, so timely and effective expectoration plays an important role in preventing and controlling infection .Because of ciliary dyskinesia, severe impairment of lung function, respiratory myasthenia, and coughing reflex disorder, the patients with mechanical ventilation have a weakening or even disappearance of physiological cough. It is undoubtedly the safest and most effective method to expectorate sputum by imitating human cough mechanism, avoiding the airway injury caused by routine clinical expectoration and the influence on mechanical ventilation.
The bionic cough simulator drains sputum with air flow generated by negative pressure, which prevents injuries to airway in conventional expectoration systems while avoiding disturbance to normal mechanical ventilation process.
The conventional expectoration systems used in clinical currently can only drain out sputum from main airway which is accessible by suction catheters. In comparison, the intelligent bionic expectoration system cleans out sputum from both the airway and the bronchi, thus achieves more effective drainage.
The intelligent bionic expectoration system captures respiration conditions of a patient with a series of sensors. The independently developed high-speed and low-resistance valve provides rapid response and helps maintain stable and accurate PEEP level. The product is therefore also applicable to patients with high-PEEP.
The bionic cough simulator interacts intelligently with the ventilator. Two operation modes are available: automatic and manual. In automatic mode, expectoration function can be activated at regular intervals without the need of intervention.