The Airway Clearance System Vest-style Expectorator is an innovative device designed to assist in the removal of mucus and secretions from the respiratory tract. Here's a detailed introduction to this system:
Working Principle
The vest-style expectorator simulates the natural coughing process. It works by connecting a vest worn by the patient to a high-speed pulse generator through tubing. The rapid inflation and deflation of the vest create rhythmic diastolic movements in the patient's chest wall. This, in turn, generates independent tremor airflow and directional drainage force in the lungs and airways. These forces help loosen, liquefy, and dislodge respiratory tract mucus and metabolites from deep within the lung lobes. Under the action of directional drainage force, the liquefied or shed metabolites are then expelled from the body. This technology is known as chest wall concussion technology.
Clinical Applications
The vest-style expectorator is primarily used in clinical settings when mucus is thick and difficult to cough up. It facilitates easier expectoration and promotes recovery from respiratory ailments. The device is particularly beneficial for patients with conditions such as postoperative recovery, weakened physical condition, lung infections, atelectasis, bronchiectasis, and chronic bronchitis.
Advantages
Enhanced Secretion Removal: The vibratory and percussive actions of the vest-style expectorator promote the secretion of mucous cells, diluting mucus and reducing its viscosity. This makes it easier for secretions to move, be loosened and dislodged, and accelerated towards the larger airways for expulsion, thereby improving lung ventilation.
Bronchodilation: The low-frequency vibrations of the device align well with the body's natural frequencies, causing relaxation of bronchial smooth muscles and further improving lung ventilation.
Reduction of Edema and Obstruction: The vibratory actions enhance local blood circulation, accelerate lymphatic return, reduce edema, and alleviate obstruction, thereby decreasing secretions and lowering pulmonary resistance.
Increased Blood Oxygen Levels: Smooth removal of mucus and secretions allows for better oxygen supply and carbon dioxide excretion, raising blood oxygen levels. Additionally, improved blood circulation and gas exchange also contribute to increased blood oxygen concentration.
Improved Breathing Sounds: Clearing secretions and dilated bronchi reduce dry lung sounds, cough sounds, and rattling sounds in the lungs.
Contraindications
The vest-style expectorator should not be used in patients with:
Bleeding sites
Pneumothorax or chest wall diseases
Pulmonary embolism
Pulmonary hemorrhage or hemoptysis
Atrial fibrillation, ventricular fibrillation
Acute myocardial infarction
Inability to tolerate vibrations
Usage Tips
Keep the device clean and avoid using sharp objects to touch the LCD screen, vest, or straps.
Ensure the treatment environment is well-ventilated to prevent the accumulation of exhaled air.
Most patients require treatment for 5-10 minutes, which can be extended to 20-30 minutes depending on the condition. Treatments should be administered twice daily, preferably 1-2 hours before meals or 2 hours after meals. Atomization therapy is recommended 20 minutes before treatment, and patients can be encouraged to cough or have suctioning done 5-10 minutes after treatment.
In summary, the Airway Clearance System Vest-style Expectorator is a valuable tool in the management of respiratory secretions, offering significant benefits to patients with respiratory conditions.
