PB760 ventilator alarm reasons and solutions

During the use of the ventilator, various alarms of the ventilator are often encountered. When the ventilator alarms, the cause needs to be found in time and dealt with in time. The causes and solutions of the alarms that occur during the use of the PB760 ventilator are as follows.

High airway pressure limit or PEEP high alarm

Cause of the problem：

• Obstruction of respiratory secretions: Due to the patient’s cough, the respiratory secretions increase and the tracheal secretions are blocked, which often indicates the retention of sputum. Among them, the increase in airway pressure when the disease fluid is retained is the most common.;
• Partial blockage of the respiratory circuit: due to the distortion of the ventilator duct, the tracheal duct is tortuous.;
• Human-machine interaction: autonomous breathing and mechanical ventilation are not in harmony, mainly due to the patient’s excitement, anxiety or desire to speak.;
• Reduced chest and lung compliance: common in substantial lung lesions;
• The pressure alarm parameters of the ventilator are improperly set.

solution：

• Timely administration of sputum suction to remove respiratory secretions;
• Strengthen inspections to avoid distortion, compression, and discounting of the pipeline, and appropriate physical restraint for patients who are unconscious and restless. The condensate in the pipeline should be dumped in time, and the condensate should be avoided from flowing countercurrent into the airway when dumping the condensate.;
• Closely observe whether the patient’s breathing is out of sync with the ventilator. If there is any abnormality, adjust the patient’s position and communicate effectively with the patient (such as seeing smears, recognizing words, and writing).;
• Reasonably set the parameters of the ventilator according to the specific circumstances of the patient.

Airway low pressure alarm refers to the occurrence of an alarm when the airway pressure of the patient’s breathing circuit is lower than the set minimum value during a complete breathing cycle.

Cause of the problem：

• Insufficient inflation of the tracheal catheter cuff or rupture of the cuff;
• The catheter connection falls off.

solution：

• Always check the inflation of the cuff and the connection of the catheter. When the inflation is insufficient, the remaining air should be drawn out.If it is confirmed that the airbag is ruptured, the tracheal duct or tracheotomy outer sleeve should be replaced.
• Give it a new firmness, and replace the pipe if necessary.For patients using ventilators, nurses should guard them 24 hours a day to prevent the ventilator duct from detaching.

High-capacity alarm

Cause of the problem：

• Patient anxiety and pain;
• Hypoxemia appears in the patient’s blood gas analysis;
• Improper setting or adjustment of the ventilator mode.

solution：

• Reference high voltage alarm;
• Examination and treatment: Once a high-volume alarm occurs, the causes of hypoxemia should be checked and dealt with immediately, such as increased respiratory secretions, blockage of the airway, decreased lung function, etc.;
• Condition: Observe whether the patient is breathing autonomously, breathing on the ventilator, and signs of fatigue on the ventilator, and notify the doctor in time if abnormalities are found and change the ventilation method.;
• Adjust the parameters.

Low-capacity alarm

Cause of the problem：

• The patient’s endotracheal catheter is disconnected from the ventilator;
• The patient’s breathing circuit is partially leaking;
• The patient is holding his breath.

solution：

• Nursing measures: same as low voltage alarm;
• Analyze the reasons for the patient’s prolonged inhalation time, check and correct the inhalation flow rate in time.Keep it at the right value.If the patient has closed drainage, a large amount of gas will leak out of the chest cavity. The alarm limit needs to be reset for the patient and the tidal volume needs to be adjusted to make up for the leakage;
• Observe the condition: Pay attention to observe the patient’s breathing frequency and rhythm. If the patient’s condition changes, such as shortness of breath, increased peak airway pressure, rapid heart rate, decreased Sp02, etc., consider the occurrence of complications.Such as: Bronchospasm, pneumothorax, atelectasis, pulmonary edema, ARDS, etc.The doctor’s condition must be reported immediately and chest closed drainage and emergency equipment must be prepared to assist the doctor in treatment.

Power disconnection alarm

Cause of the problem：

• When the power supply is lost, such as an external power failure or insufficient battery power, an alarm occurs.

solution：

• Take corresponding measures for different reasons;
• If the power failure is the cause, the ventilator should be immediately disconnected from the patient’s artificial airway, or the ventilator should be switched to the safety valve open state.Give the patient artificial ventilation.Enable the patient to maintain normal ventilation function and breathe indoor air;
• If the power plug falls off or the power supply is turned off, the ventilator should be immediately disconnected from the artificial airway of the patient’s artificial airway, and the power supply or the switch should be reconnected while the patient is artificially ventilated.

summary：

In order to prevent the failure of the ventilator, medical staff should understand the performance and use of the instrument.Nurses on duty should be more familiar with the performance, characteristics and methods of use of ventilators.Reasonably set the upper and lower limits of the ventilator alarm, and when the ventilator alarms, it is possible to find the cause of the alarm and lift the alarm as soon as possible, and detect changes in the condition in time, so as to avoid serious complications due to ventilation and oxygenation disorders during mechanical ventilation, which is very important to improve the success rate of respiratory treatment and rescue for patients with mechanical ventilation.