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Alarms used in critical and non-critical ventilators, breathing circuit connections, and anesthesia circuits. They warn of high or low pressure changes in airway circuits of mechanically ventilated patients, indicating ventilation failure.
1. A remote alarm feature should be available.
2. The airway pressure alarm should have a continuous elevated pressure alarm. If operated on line power, it should also have a power failure alarm.
3. Battery-operated apnea alarm systems should have a low-battery indicator.
4. Both visual and audible alarms should be part of the breathing circuit monitor unit: there should be an apnea alarm delay of 5 to 100 seconds, a low-pressure alarm of 2 to 30 cm H2O, and a high-pressure alarm of 5 to 100 cm H2O.
5. Audible and visual airway pressure alarms should be clear and noticeable.
6. Apnea alarm systems offering volume adjustments should not allow users to turn the volume down, so it is not likely to be heard. When silencing an alarm, there must be a clear visual display. Turning off visual alarms should be impossible. Alarms should remain until the condition is corrected.
7. Users should protect the breathing circuit monitors in the appropriate way against loss of power.
Before you purchase your Apnea Alarm, we recommend you ask the seller the following questions:
Pressure Alarm Parameters
System Alarm Parameters
Apnea monitors measure respiration parameters in order to detect instances where breathing stops. Audio- visual alarms note changes in respiratory rate or air volume. Alarm activation parameters can be set by user. Respiration can be sensed mechanically or directly, using thermistors and carbon dioxide sensors.
1. These devices are designed to detect the cessation of breathing in infants and adults who are at risk of respiratory failure and alert the parent or attendant in such a condition.
2. The apnea monitors should interpret clinical waveforms, accurately detect respiration, avoid misinterpreting inappropriate signals as breaths, and incorporate an adjustable bradycardia alarm setting.
3. Breath rates up to 90 bpm should be detected; the minimum bradycardia alarm limit should be 30 bpm. If a respiration rate meter is included, it should be accurate to within 10%.
4. Each detected breath should activate a light to indicate respiration. The visual indicator should be bright enough to be seen from across the room, in a well-lit room at varying angles.
5. Clear visible and/or audible alarms should be available. Users will not be able to turn the volume down on an audible alarm so it could not be heard. An audible alarm silence is acceptable, but the alarm must recur automatically if the condition is present, and a visual display should clearly indicate which alarm is silenced.
6. For safe and effective monitoring, several features are crucial. These include a built-in heart rate detector, a remote alarm, a power-loss alarm, and a battery-charge or AC-power indicator.
7. Other important features include: documentation capabilities, output jacks for additional devices, such as recorders and pulse oximeters. The maximum respiratory sensitivity should be 0.2 to 0.3 ohms. The sensitivity control should be automatic to prevent user error. When a manual control is provided, it should be graduated to facilitate adjusting and troubleshooting.
8. Home monitors include some important features to ensure that alarms are always seen and heard. Among these are visual alarms that can be seen from a variety of angles, loud and distinct audible alarms, and remote alarms.
9. To prevent tampering, some of these home units feature hidden alarm controls.
10. Manufacturers and facilities often offer home care services for setting up and maintaining the monitor. These should include educational support, 24-hour telephone hotlines, and replacement equipment in the event of a failure.
11. Suppliers must provide parents or caregivers with training in the use of a home monitor. To ensure that the monitor performs effectively, safety practices should be followed.
Before you purchase your Apnea Monitor, we recommend you ask the seller the following questions: