Cough Assist Device (MIE) KT-300QJ

Therapeutic Principle:

The Mechanical Inhalation-Exhalation (MIE) technique involves positive-pressure inspiration to expand the lungs, fill the alveoli, and increase intrapulmonary pressure. Negative-pressure exhalation creates a suction effect, rapidly expelling air from the lungs and promoting the movement of deep pulmonary secretions such as sputum along with airflow toward the atmospheric airways. These secretions are subsequently transported via airflow to the throat, thereby simulating the entire process of human coughing and facilitating expectoration.

functional parameter ：

1、Screen specifications: 8-inch HD LCD touchscreen with full Chinese navigation and full-screen touch control.

2、technical parameter ：

（1）Positive pressure inspiration parameters range from 0 kPa to +7.0 kPa, continuously adjustable with increments of 0.1 kPa.

（2）Negative pressure exhalation parameters range from-7.0 kPa to 0 kPa, continuously adjustable with increments of 0.1 kPa.

（3）The inhalation and exhalation durations can be continuously adjusted from 0 to 5.0 seconds, with increments of 0.1 seconds.

（4）Work duration is continuously adjustable from 1 to 99 minutes, with increments of 1 minute.

（5）The inspiratory flow rate can be adjusted in three levels: high, medium, and low.

3、The device features five therapeutic modes to meet diverse treatment requirements:

（1）Manual mode: Predefined positive pressure inspiration and negative pressure expiration parameters can be set, allowing individual positive pressure inspiration or negative pressure expiration cycles to be performed via manual switches, with display of single treatment duration. Inhalation flow rate is adjustable in three levels: high, medium, and low.

（2）Automatic Mode: Allows presetting of positive pressure inspiration and negative pressure expiration parameters, as well as expiration, inspiration, and interval durations. The device automatically performs positive pressure inspiration and negative pressure expiration actions based on the preset parameters. The inspiratory flow rate can be adjusted in high, medium, or low settings.

（3）Advanced Mode: Allows presetting of positive pressure inspiration and negative pressure expiration parameters, as well as exhalation, inspiration, and interval durations. The device automatically performs positive pressure inspiration and negative pressure expiration actions based on the preset parameters. Inhalation flow rate is adjustable across high, medium, and low settings. Supports respiratory triggering function, blood oxygen monitoring function, and oscillation function.

（4）Custom modes: Featuring storage capabilities to save treatment prescriptions, including OLE mode, lung expansion mode, low-intensity mode, medium-intensity mode, high-intensity mode, etc.

（5）Intelligent Operation Mode: Building upon the advanced mode, you can set the number of cycles (range: 1–12) with a step size of 1. The device will cease operation upon completion of all cycles. Definition of cycle count: One full working cycle is defined as the sequence from initiation of positive-pressure exhalation to negative-pressure inhalation followed by an interval pause.

4、Breathing trigger function: This feature can be activated or deactivated based on the patient's spontaneous breathing patterns.

5、Oscillation function: The oscillation function supports optional inhalation and exhalation oscillations with an error margin of ±1 Hz.

6、Device display function: During operation, the screen displays the current pressure (resolution 0.1 kPa), time (resolution 0.1 s), tidal volume (resolution 1 mL), and peak flow rate (resolution 1 L/min).

7、The device features a cough detection function: upon completion of a single treatment session, it displays the total number of simulated cough cycles and the number of effective coughs.

8、Inhalation flow rate: Increases from low or medium to high levels within <1 second.

9、The core component of the device—a solenoid valve—is fabricated from a single-piece copper alloy. It exhibits exceptional gas sealing performance, demonstrating zero leakage under 600 kPa pressure, and meets IP65 waterproofing standards. The manufacturing process strictly complies with the mechanical industry standard JB/T7352-2010.

10、The device features an automatic circulation function: upon startup, it automatically initiates a period of inhalation followed by a period of exhalation to facilitate internal air circulation. It is equipped with a disinfection unit for sterilizing the interior of the machine, thereby reducing the risk of nosocomial infections.

11、Screen Off Function: When the device is not in touch mode, the screen will enter standby after 5 minutes; tap the screen to wake it up.

12、Security Lock Feature: The device has a security lock screen feature. Tap the lock icon to lock screen settings and prevent accidental access. Tap the lock icon again to unlock.

13、Equipped with blood oxygen monitoring functionality, the device uses a pulse oximeter probe with a measurement range of 35%–100%. The measurement error within this range is ±2%, where the percentage (%) indicates pulse oxygen saturation. Accuracy: When used in conjunction with a sputum expectorator, the error remains below 3% across the 70–100% measurement range. Pulse rate monitoring error ranges from 30 to 250 bpm, with an error of either ±2 bpm or ±2%—the higher value applies. The blood oxygen probe used in this device is a product that has obtained regulatory certification.

14、The moisture volume detection range is 0–50,001 mL, and the peak flow rate detection range is 0–500 L/min.

15、Expand the OLE functionality component and the Oxy functionality component.

16、The device can be optionally equipped with a dedicated cart.

17、The device can be equipped with a battery for use during transportation.

Electrical Parameters:

1、Operating Noise: During normal operation, the equipment's noise level shall not exceed 75 dB(A).

2、Environmental temperature: -10°C to +40°C.

3、Relative humidity: ≤80%.

4、Power Supply Voltage: AC 110–220 V, 50 Hz; Power: 260 VA.