Recalls for Gas-machine, Anesthesia
173 on file
- Maquet Critical Care ABOpen, ClassifiedAug 3, 2026
Events observed where anesthetic agent was not delivered when the vaporizer was activated. Failure to deliver the anesthetic agent may result in the patient receiving insufficient anesthesia and may lead to intraoperative awareness.
- Draeger, Inc.Open, ClassifiedJun 4, 2026
The Atlan anesthesia workstation either indicated a failure of the piston ventilator before use or suffered a failure of the mechanical ventilation during use.
- Draeger, Inc.Open, ClassifiedJun 4, 2026
The Atlan anesthesia workstation either indicated a failure of the piston ventilator before use or suffered a failure of the mechanical ventilation during use.
- GE Medical Systems China Co., Ltd.Open, ClassifiedDec 18, 2025
Potential unexpected shutdown of Carestation 600 and 700 Series Anesthesia Systems containing certain power management boards, if the AC mains power is unplugged or in the event of an AC mains power failure. Anesthesia systems only operate on battery power in a rare event that AC mains power is lost and there is no continuous backup emergency power. If AC power is interrupted, the system will not automatically switch over to the battery supply mode and will reboot. If this issue occurs, a temporary disruption of mechanical ventilation, manual ventilation, and volatile agent delivery may occur. Following the reboot, the system will not return to the previous ventilation settings.
- GE Medical Systems China Co., Ltd.Open, ClassifiedDec 18, 2025
Potential unexpected shutdown of Carestation 600 and 700 Series Anesthesia Systems containing certain power management boards, if the AC mains power is unplugged or in the event of an AC mains power failure. Anesthesia systems only operate on battery power in a rare event that AC mains power is lost and there is no continuous backup emergency power. If AC power is interrupted, the system will not automatically switch over to the battery supply mode and will reboot. If this issue occurs, a temporary disruption of mechanical ventilation, manual ventilation, and volatile agent delivery may occur. Following the reboot, the system will not return to the previous ventilation settings.
- GE Medical Systems China Co., Ltd.Open, ClassifiedDec 18, 2025
Potential unexpected shutdown of Carestation 600 and 700 Series Anesthesia Systems containing certain power management boards, if the AC mains power is unplugged or in the event of an AC mains power failure. Anesthesia systems only operate on battery power in a rare event that AC mains power is lost and there is no continuous backup emergency power. If AC power is interrupted, the system will not automatically switch over to the battery supply mode and will reboot. If this issue occurs, a temporary disruption of mechanical ventilation, manual ventilation, and volatile agent delivery may occur. Following the reboot, the system will not return to the previous ventilation settings.
- Mindray DS USA, Inc. dba Mindray North AmericaOpen, ClassifiedNov 26, 2025
Potential for anesthesia leakage.
- Mindray DS USA, Inc. dba Mindray North AmericaOpen, ClassifiedNov 26, 2025
Potential for anesthesia leakage.
- Draeger, Inc.Open, ClassifiedOct 1, 2025
The device either indicated a failure of the piston ventilator before use or suffered a failure of the mechanical ventilation during use.
- Draeger, Inc.Open, ClassifiedOct 1, 2025
The device either indicated a failure of the piston ventilator before use or suffered a failure of the mechanical ventilation during use.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- GE Medical Systems China Co., Ltd.Open, ClassifiedApr 29, 2025
Certain Carestation 620/650/650c and 750/750c Anesthesia Delivery Systems will not provide effective ventilation in Volume Control Ventilation (VCV) mode. In these systems, effective ventilation can be achieved in Pressure Control Ventilation (PCV) or Pressure Control Ventilation Volume Guarantee (PCV-VG) modes or with Manual ventilation.
- Getinge Usa Sales IncOpen, ClassifiedFeb 7, 2025
Sevoflurane used with the vaporizer may degrade to hydrogen fluoride, which could present a risk to patients or health care providers through inhalation and/or skin exposure. Potential harms include irritation of respiratory tract, which in worst case may lead to lung edema and/or severe hypocalcemia, blistering, superficial ulceration, and/or hypomagnesemia.
- Draeger Medical, Inc.Open, ClassifiedDec 18, 2024
The Atlan anesthesia workstation either indicated a failure of the piston ventilator before use or suffered a failure of the mechanical ventilation during use.
- Draeger Medical, Inc.Open, ClassifiedDec 18, 2024
The Atlan anesthesia workstation either indicated a failure of the piston ventilator before use or suffered a failure of the mechanical ventilation during use.
- Draeger Medical, Inc.Open, ClassifiedNov 13, 2024
The Atlan anesthesia workstation either indicated a failure of the piston ventilator before use or suffered a failure of the mechanical ventilation during use.
- Draeger Medical, Inc.Open, ClassifiedNov 13, 2024
The Atlan anesthesia workstation either indicated a failure of the piston ventilator before use or suffered a failure of the mechanical ventilation during use.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Datex-Ohmeda, Inc.Open, ClassifiedOct 18, 2024
Potential issue that may arise if the limb of a patient breathing circuit is mistakenly connected to the Auxiliary Common Gas Outlet (ACGO) port.
- Mindray DS USA, Inc. dba Mindray North AmericaOpen, ClassifiedSep 4, 2024
V90 electronic vaporizer anesthetic agent output may be higher than the set amount due to a component within the vaporizer causing an incomplete seal in some cases. Should this issue occur, the A9 Anesthesia System will generate alarms associated with abnormal vaporizer output. If the anesthetic concentration is too high, the patient can inhale too much anesthetic agent; the patient may suffer from symptoms such as vertigo and drowsiness after the operation. In severe cases, the patient may suffer from neurological sequelae such as hypomnesia and inattention
- Mindray DS USA, Inc. dba Mindray North AmericaOpen, ClassifiedSep 4, 2024
V90 electronic vaporizer anesthetic agent output may be higher than the set amount due to a component within the vaporizer causing an incomplete seal in some cases. Should this issue occur, the A9 Anesthesia System will generate alarms associated with abnormal vaporizer output. If the anesthetic concentration is too high, the patient can inhale too much anesthetic agent; the patient may suffer from symptoms such as vertigo and drowsiness after the operation. In severe cases, the patient may suffer from neurological sequelae such as hypomnesia and inattention
- Mindray DS USA, Inc. dba Mindray North AmericaOpen, ClassifiedSep 4, 2024
V90 electronic vaporizer anesthetic agent output may be higher than the set amount due to a component within the vaporizer causing an incomplete seal in some cases. Should this issue occur, the A9 Anesthesia System will generate alarms associated with abnormal vaporizer output. If the anesthetic concentration is too high, the patient can inhale too much anesthetic agent; the patient may suffer from symptoms such as vertigo and drowsiness after the operation. In severe cases, the patient may suffer from neurological sequelae such as hypomnesia and inattention
- Mindray DS USA, Inc. dba Mindray North AmericaOpen, ClassifiedSep 4, 2024
V90 electronic vaporizer anesthetic agent output may be higher than the set amount due to a component within the vaporizer causing an incomplete seal in some cases. Should this issue occur, the A9 Anesthesia System will generate alarms associated with abnormal vaporizer output. If the anesthetic concentration is too high, the patient can inhale too much anesthetic agent; the patient may suffer from symptoms such as vertigo and drowsiness after the operation. In severe cases, the patient may suffer from neurological sequelae such as hypomnesia and inattention
- Getinge Usa Sales IncOpen, ClassifiedMay 31, 2024
Sevoflurane used with the vaporizer may degrade to hydrogen fluoride, which could present a risk to patients or health care providers through inhalation and/or skin exposure. Potential harms include irritation of respiratory tract, which in worst case may lead to lung edema and/or severe hypocalcemia, blistering, superficial ulceration, and/or hypomagnesemia.
- Draeger Medical, Inc.Open, ClassifiedApr 18, 2024
Unexpected shutdown while operating on battery power.
- Getinge Usa Sales IncOpen, ClassifiedFeb 6, 2024
Potential cybersecurity vulnerability that could lead to a Denial of Service (DoS) attack, tampering, or remote code execution via remote login to the Flow Anesthesia System, any of which could lead to a hazardous situation.
- Getinge Usa Sales IncOpen, ClassifiedFeb 6, 2024
Potential cybersecurity vulnerability that could lead to a Denial of Service (DoS) attack, tampering, or remote code execution via remote login to the Flow Anesthesia System, any of which could lead to a hazardous situation.
- Getinge Usa Sales IncOpen, ClassifiedFeb 6, 2024
Potential cybersecurity vulnerability that could lead to a Denial of Service (DoS) attack, tampering, or remote code execution via remote login to the Flow Anesthesia System, any of which could lead to a hazardous situation.
- Getinge Usa Sales IncOpen, ClassifiedFeb 6, 2024
Potential cybersecurity vulnerability that could lead to a Denial of Service (DoS) attack, tampering, or remote code execution via remote login to the Flow Anesthesia System, any of which could lead to a hazardous situation.
- Getinge Usa Sales IncOpen, ClassifiedFeb 6, 2024
Potential cybersecurity vulnerability that could lead to a Denial of Service (DoS) attack, tampering, or remote code execution via remote login to the Flow Anesthesia System, any of which could lead to a hazardous situation.
- Draegerwerk Ag & Co. KgaaOpen, ClassifiedFeb 1, 2024
Internal backup battery may fail spontaneously while the Atlan is being operated without AC mains supply, resulting in unexpected shutdown of the device while running on batteries.
- Getinge Usa Sales IncOpen, ClassifiedJan 26, 2023
Due to a software bug, under certain conditions, pressure cannot be built up resulting in no ventilation. If gas delivery is stopped, a sustained decrease in delivered O2 concentration may lead to hypoventilation and hypoxia.
- Getinge Usa Sales IncOpen, ClassifiedJan 26, 2023
Due to a software bug, under certain conditions, pressure cannot be built up resulting in no ventilation. If gas delivery is stopped, a sustained decrease in delivered O2 concentration may lead to hypoventilation and hypoxia.
- Getinge Usa Sales IncOpen, ClassifiedJan 26, 2023
Due to a software bug, under certain conditions, pressure cannot be built up resulting in no ventilation. If gas delivery is stopped, a sustained decrease in delivered O2 concentration may lead to hypoventilation and hypoxia.
- Getinge Usa Sales IncOpen, ClassifiedDec 7, 2022
The power backup battery, under certain conditions, may exhibit reduced battery run-time while in use, and there is a potential that the battery may fail to provide the expected run time in the event of a mains power failure. This could require the clinician to use manual emergency ventilation of another ventilator is not available and the backup battery is exhausted.
- GE Healthcare, LLCTerminatedJul 19, 2022
There is a potential reversal of the O2 and air cylinder pressure transducer connections.
- Getinge Usa Sales IncTerminatedJun 23, 2022
Potential for crack to form on the on/off switch of the suction unit, which may result in an unreasonable risk of harm to the patient. In the worst case, the switch can break, preventing the suction unit from being activated.
- Getinge Usa Sales IncTerminatedJun 23, 2022
Potential for crack to form on the on/off switch of the suction unit, which may result in an unreasonable risk of harm to the patient. In the worst case, the switch can break, preventing the suction unit from being activated.
- GE Healthcare, LLCTerminatedJan 23, 2020
GE Healthcare has become aware that there is a potential for a loose cable connection inside specific manufactured anesthesia devices. This would cause a loss of mechanical ventilation and the system will provide high priority audio and visual alarms. Loss of mechanical ventilation could lead to hypoxia if the clinician does not intervene.
- GE Healthcare, LLCTerminatedJan 23, 2020
GE Healthcare has become aware that there is a potential for a loose cable connection inside specific manufactured anesthesia devices. This would cause a loss of mechanical ventilation and the system will provide high priority audio and visual alarms. Loss of mechanical ventilation could lead to hypoxia if the clinician does not intervene.
- GE Healthcare, LLCTerminatedNov 9, 2018
Upgraded Aisys anesthesia devices and Aisys CS2 anesthesia devices with PSVPro Spontaneous Breathing Modes do not provide the PSVPro ventilation mode feature of transitioning to SIMV PCV backup ventilation mode. PSVPro Spontaneous Breathing Modes do not provide the feature of transitioning to SIMV PCV backup ventilation mode for a patient who stops spontaneous breathing if the PSVPro ventilation mode is in use prior to the clinician starting the Cycling Procedure.
- GE Healthcare, LLCTerminatedNov 9, 2018
Upgraded Aisys anesthesia devices and Aisys CS2 anesthesia devices with PSVPro Spontaneous Breathing Modes do not provide the PSVPro ventilation mode feature of transitioning to SIMV PCV backup ventilation mode. PSVPro Spontaneous Breathing Modes do not provide the feature of transitioning to SIMV PCV backup ventilation mode for a patient who stops spontaneous breathing if the PSVPro ventilation mode is in use prior to the clinician starting the Cycling Procedure.
- GE Healthcare, LLCTerminatedNov 9, 2018
Upgraded Aisys anesthesia devices and Aisys CS2 anesthesia devices with PSVPro Spontaneous Breathing Modes do not provide the PSVPro ventilation mode feature of transitioning to SIMV PCV backup ventilation mode. PSVPro Spontaneous Breathing Modes do not provide the feature of transitioning to SIMV PCV backup ventilation mode for a patient who stops spontaneous breathing if the PSVPro ventilation mode is in use prior to the clinician starting the Cycling Procedure.
- Draeger Medical, Inc.TerminatedMay 8, 2018
The automatic ventilation may fail if the position detection of the motor is disturbed. If the ventilator cover is damaged, manual ventilation may also fail.
- Draeger Medical, Inc.TerminatedMay 8, 2018
The automatic ventilation may fail if the position detection of the motor is disturbed. If the ventilator cover is damaged, manual ventilation may also fail.
- Draeger Medical, Inc.TerminatedMay 8, 2018
The automatic ventilation may fail if the position detection of the motor is disturbed. If the ventilator cover is damaged, manual ventilation may also fail.
- Draeger Medical, Inc.TerminatedMay 8, 2018
The automatic ventilation may fail if the position detection of the motor is disturbed. If the ventilator cover is damaged, manual ventilation may also fail.
- Spacelabs Healthcare, Ltd.TerminatedNov 21, 2017
Arkon Anesthesia Workstation, with software version 2.61, experienced failure in mechanical ventilation, oxygen and anesthetic gas delivery, with concurrent failure of the display unit that resulted in a blank screen without audible or visible alarms.
- GE Healthcare, LLCTerminatedMay 24, 2017
Carestation 620, 650 and 650c has Potential for Elevated FiCO2 and Unexpected System Malfunction
- Maquet Cardiovascular Us Sales, LlcTerminatedFeb 22, 2016
Electrical issues in the control, monitoring or panel sub-systems, caused by the printed circuit boards (PCBs) that control the sub-systems. The problems manifested as multiple re-starts of the sub-systems and, in a few instances, disabling of the system has occurred. Replacement PCBs are now available to correct the issues. Only the Model C20 is affected in the US.
- GE Medical Systems, LLCTerminatedJan 21, 2016
The Drive Gas Check Valve of certain Anesthesia products could become stuck in a fixed open position, which could cause pressure to build in the mechanical ventilation cycle. If this issue is left unresolved, it could result in excessive or prolonged pressure in the patient breathing circuit during ventilation potentially resulting in barotrauma.
- GE Medical Systems, LLCTerminatedJan 21, 2016
The Drive Gas Check Valve of certain Anesthesia products could become stuck in a fixed open position, which could cause pressure to build in the mechanical ventilation cycle. If this issue is left unresolved, it could result in excessive or prolonged pressure in the patient breathing circuit during ventilation potentially resulting in barotrauma.
- GE Medical Systems, LLCTerminatedJan 21, 2016
The Drive Gas Check Valve of certain Anesthesia products could become stuck in a fixed open position, which could cause pressure to build in the mechanical ventilation cycle. If this issue is left unresolved, it could result in excessive or prolonged pressure in the patient breathing circuit during ventilation potentially resulting in barotrauma.
- GE Medical Systems, LLCTerminatedJan 21, 2016
The Drive Gas Check Valve of certain Anesthesia products could become stuck in a fixed open position, which could cause pressure to build in the mechanical ventilation cycle. If this issue is left unresolved, it could result in excessive or prolonged pressure in the patient breathing circuit during ventilation potentially resulting in barotrauma.
- GE Medical Systems, LLCTerminatedJan 21, 2016
The Drive Gas Check Valve of certain Anesthesia products could become stuck in a fixed open position, which could cause pressure to build in the mechanical ventilation cycle. If this issue is left unresolved, it could result in excessive or prolonged pressure in the patient breathing circuit during ventilation potentially resulting in barotrauma.
- Draeger Medical, Inc.TerminatedDec 12, 2015
There is a potential problem with the device main power switch of the Perseus A500 Anesthesia Workstation. The device power switch may spontaneously fail during use, causing one of the following to occur: 1. The workstation has a fresh gas delivery failure and a ventilator failure with respective alarms. 2. The workstation shuts down completely with an audible alarm.
- Draeger Medical, Inc.TerminatedJul 27, 2015
the Fabius MRI or parts of the system were attracted by the magnetic field of the MRI. If the Fabius MRI is positioned too close to the MRI, its parts can be loosened as a result of the magnetic force of the MRI.
- Maquet Cardiovascular Us Sales, LlcTerminatedJul 15, 2015
Maquet has identified that in some FLOW-i Anesthesia System Auxiliary O2 and Suction Modules, the suctioning function cannot be activated or controlled by the suction unit on/off switch leading to a decrease or loss of suctioning capability of the modules.
- Maquet Cardiovascular Us Sales, LlcTerminatedJun 8, 2015
In some Flow-i Anesthesia Systems, patient cassette can get dislodged which could result in gas leakage within the system internal circuit potentially leading to a stop in ventilation.
- GE HealthcareTerminatedApr 2, 2015
Specific Aespire 7900 Anesthesia Machines have an increased likelihood of failure of the CPU circuit board. This could result in a blank display or loss of mechanical ventilation.
- MCKESSON TECHNOLOGIES INC.TerminatedMar 5, 2014
There was an occurrence where the patient case data did not match the patient data when the case was recalled in the Anesthesia Care Record (ACR) in that it included data from another case.
- Del Mar Reynolds Medical, Ltd.TerminatedNov 20, 2013
Spacelabs Healthcare Ltd. of United Kingdom recalls , and Service Kits, Part Number 050-0659-00 and 050-0901-00. The Bag to-Vent switch in CAS I/II Absorbers may fail due to loose fastening hardware in an absorber.
- GE Healthcare, LLCTerminatedOct 15, 2013
GE Healthcare has recently become aware of a potential safety issue involving the Avance, Avance CS2, and Aisys anesthesia devices. While operating in Pressure Control Ventilation Volume Guarantee (PCV-VG) mode, the affected products may produce an over delivery tidal volume when given a unique sequence of user inputs and a collapsed bellows (partially filled circuit). Exposure to excessiv
- GE Healthcare, LLCTerminatedOct 15, 2013
GE Healthcare has recently become aware of a potential safety issue involving unresponsive buttons on the display of the Engstrm ventilator and the Aespire View, Aisys, and Avance anesthesia machines. As a result of a manufacturing issue, the buttons on the left, right, and bottom keypads may not always detect button presses. This may result in the inability to access certain menu functions wh
- Draeger Medical, Inc.TerminatedOct 10, 2013
During final testing of the Draeger Fabius GS Premium, Fabius OS, and Fabius Tiro anesthesia machines, some units did not pass the high voltage test and the minimum clearance between an electrical component and the unit housing was not maintained for some from a specific batch.
- GE Healthcare, LLCTerminatedSep 6, 2013
GE Healthcare has recently become aware of a potential safety issue involving the pre-operative check, low pressure leak test at 1% dial setting of the Tec 6 and Tec 6 Plus Vaporizers. The user manual pre-operative check, low pressure leak test may not detect the full range of leaks from seal wear degradation in the vaporizers. If the leak is not detected, it will result in fresh gas leaking to
- GE Healthcare, LLCTerminatedJun 3, 2013
GE Healthcare has recently become aware of a potential safety issue involving the reusable CO2 absorbent canister accessory used with Aespire, Aespire View, Avance, Avance CS2, Aisys, ADU, 9100, M900, M904, 9300 systems. Reusable CO2 absorbent canisters accessories may not seal properly.
- Del Mar Reynolds Medical, Ltd.TerminatedDec 19, 2012
The BleaseFocus Anesthesia Workstation and 700/900 Series Ventilators were shipped with manuals that describe a secondary O2 Supply Failure alarm which has not been incorporated into the system. The manuals were prematurely updated for a feature that is not yet available.
- Mindray DS USA, Inc. d.b.a. Mindray North AmericaTerminatedNov 16, 2012
Mindray has identified the potential for a system leak resulting an issue related to the carbon dioxide absorber canister gasket on A3/A5 Anesthesia Delivery Systems. A potential system leak resulting from the canister gasket will likely present itself during the Automatic Circuit Leak and Compliance Test performed at startup and the Manual Leak Test recommended to be performed before each case.
- Mindray DS USA, Inc. d.b.a. Mindray North AmericaTerminatedNov 16, 2012
Mindray has identified the potential for a system leak resulting an issue related to the carbon dioxide absorber canister gasket on A3/A5 Anesthesia Delivery Systems. A potential system leak resulting from the canister gasket will likely present itself during the Automatic Circuit Leak and Compliance Test performed at startup and the Manual Leak Test recommended to be performed before each case.
- Accutron IncTerminatedOct 9, 2012
Accutron is recalling the Flowmeter (Analgesia Gas Machine) because when it flows Nitrous Gas without Oxygen gas being turned on, it functions in an incorrect manner.
- Accutron IncTerminatedOct 9, 2012
Accutron is recalling the Flowmeter (Analgesia Gas Machine) because when it flows Nitrous Gas without Oxygen gas being turned on, it functions in an incorrect manner.
- Accutron IncTerminatedOct 9, 2012
Accutron is recalling the Flowmeter (Analgesia Gas Machine) because when it flows Nitrous Gas without Oxygen gas being turned on, it functions in an incorrect manner.
- Accutron IncTerminatedOct 9, 2012
Accutron is recalling the Flowmeter (Analgesia Gas Machine) because when it flows Nitrous Gas without Oxygen gas being turned on, it functions in an incorrect manner.
- Maquet Cardiovascular Us Sales, LlcTerminatedJul 6, 2012
A technical alarm may be generated on the FLOW-i system when using the MAN/AUTO switch to change ventilation modes from manual to automatic or from automatic to manual if the switch is not fully engaged in the "on" or "off" position but remains in the "in-between position.
- Penlon, Ltd.TerminatedMar 26, 2012
Penlon, Ltd has identified the potential for the premature failure of a component in some Electronic Flowmeter sensor display unit PCB assemblies.
- Spacelabs Healthcare, LlcTerminatedDec 27, 2010
Users may experience difficulty turning the control knob to an active vapour delivery setting, or may not be able to turn on the Left Hand mounted vapouriser on the Blease Sirius Anaesthesia Systems.
- GE Healthcare, LLCTerminatedOct 6, 2010
Users may inadvertently leave a test plug in the inspiratory flow sensor after completing Low P Leak Check on the SCGO (Switched Common Gas Outlet) configuration of Avance, Amingo, and Aisys anesthesia machines that may impact patient safety. If the test plug remains in place and therapy is initiated, the machine will not provide gas to the patient. This would inhibit mechanical or manual ventila
- GE Healthcare, LLCTerminatedOct 6, 2010
Users may inadvertently leave a test plug in the inspiratory flow sensor after completing Low P Leak Check on the SCGO (Switched Common Gas Outlet) configuration of Avance, Amingo, and Aisys anesthesia machines that may impact patient safety. If the test plug remains in place and therapy is initiated, the machine will not provide gas to the patient. This would inhibit mechanical or manual ventila
- GE Healthcare, LLCTerminatedOct 6, 2010
Users may inadvertently leave a test plug in the inspiratory flow sensor after completing Low P Leak Check on the SCGO (Switched Common Gas Outlet) configuration of Avance, Amingo, and Aisys anesthesia machines that may impact patient safety. If the test plug remains in place and therapy is initiated, the machine will not provide gas to the patient. This would inhibit mechanical or manual ventila
- Draeger Medical Systems, Inc.TerminatedSep 23, 2010
potential failures to Electri-Cord Manufacturing AC power cord
- Draeger Medical Systems, Inc.TerminatedSep 23, 2010
potential failures to Electri-Cord Manufacturing AC power cord
- Philips Healthcare Inc.TerminatedAug 24, 2010
The manifold seal in the Philips M1657B Water Trap used on the Philips M1013A IntelliVue G1, M1019A, IntelliVue G5, and Anesthesia Gas Modules M1026B/BT may be unintentionally removed when changing the traps. A missing seal may result in leakage and may cause incorrect monitor readings of inspiratory or expiratory gas levels.
- Philips Healthcare Inc.TerminatedAug 24, 2010
The manifold seal in the Philips M1657B Water Trap used on the Philips M1013A IntelliVue G1, M1019A, IntelliVue G5, and Anesthesia Gas Modules M1026B/BT may be unintentionally removed when changing the traps. A missing seal may result in leakage and may cause incorrect monitor readings of inspiratory or expiratory gas levels.
- Philips Healthcare Inc.TerminatedAug 24, 2010
The manifold seal in the Philips M1657B Water Trap used on the Philips M1013A IntelliVue G1, M1019A, IntelliVue G5, and Anesthesia Gas Modules M1026B/BT may be unintentionally removed when changing the traps. A missing seal may result in leakage and may cause incorrect monitor readings of inspiratory or expiratory gas levels.
- Philips Healthcare Inc.TerminatedAug 24, 2010
The manifold seal in the Philips M1657B Water Trap used on the Philips M1013A IntelliVue G1, M1019A, IntelliVue G5, and Anesthesia Gas Modules M1026B/BT may be unintentionally removed when changing the traps. A missing seal may result in leakage and may cause incorrect monitor readings of inspiratory or expiratory gas levels.
- Spacelabs Healthcare, LlcTerminatedJul 29, 2010
Potential for the touch screen on the ventilator portion of the device to go blank when touched. Possibility that this failure may also cause mechanical ventilation to stop.
- Ge Healthcare, LlcTerminatedMay 11, 2010
Unanticipated shut-down: A specific lot of GE Healthcare Aisys and Avance machines control board wiring harness have a defect, which can cause the machine to unexpectedly shut down, terminating ventilation, anesthetic delivery, and potentially patient monitoring.
- Ge Healthcare, LlcTerminatedMay 11, 2010
Unanticipated shut-down: A specific lot of GE Healthcare Aisys and Avance machines control board wiring harness have a defect, which can cause the machine to unexpectedly shut down, terminating ventilation, anesthetic delivery, and potentially patient monitoring.
- Blease Medical Equipment, Ltd.TerminatedApr 16, 2010
Potential for delivery of a lower than set concentration of anaesthetic to a patient due to a sticking valve. The lower shuttle may become jammed, not permitting flow of anaesthesia gas through the vapouriser. The vapouriser back bar mounting valves will require exchange only on the systems identified in this matter, no other systems are affected.
- Mindray DS USA, Inc., dba Datascope Patient MonitoringTerminatedApr 8, 2010
An issue affecting the caster mount on the AS3000 System have been identified, specifically reports of the caster mount breaking, causing the wheel to fall off and the unit to tip.
- GE HealthcareTerminatedJul 30, 2009
GE Healthcare has received reports of breathing circuit or tubing misconnections of the Anesthesia Delivery Unit (ADU), that may impact patient safety.
- GE HealthcareTerminatedJul 30, 2009
GE Healthcare has received reports of breathing circuit or tubing misconnections of the Anesthesia Delivery Unit (ADU), that may impact patient safety.
- GE HealthcareTerminatedJul 30, 2009
GE Healthcare has received reports of breathing circuit or tubing misconnections of the Anesthesia Delivery Unit (ADU), that may impact patient safety.
- GE HealthcareTerminatedJun 23, 2009
Unintended shut-down: The anesthesia machine may start shutting down without human intervention due to a faulty On/Standby Switch. Prior to shutdown, the system will issue an alarm and play a message that shutdown will occur in 8 seconds. The failure only affects the electrical portion of the switch. If the clinician does not intervene, the patient could experience hypoventilation leading to h
- GE HealthcareTerminatedJun 23, 2009
Unintended shut-down: The anesthesia machine may start shutting down without human intervention due to a faulty On/Standby Switch. Prior to shutdown, the system will issue an alarm and play a message that shutdown will occur in 8 seconds. The failure only affects the electrical portion of the switch. If the clinician does not intervene, the patient could experience hypoventilation leading to h
- Mindray DS USA, Inc., dba Datascope Patient MonitoringTerminatedDec 5, 2008
Two issues have been identified with the AS3000 unit. 1. The threadlocker of the caster (wheels) may not have been utilized, which may allow the caster to loosen and possibly separate from the unit. 2. The use of select brands of pre-pack absorber in the absorber canister of the AS3000 has been associated, in some cases, with gas leakage around the pre-pack, rather than through the absorber mate
- Draeger Medical, Inc.TerminatedOct 8, 2008
Sporadic errors in various device functions, including low readings of the single gas flows for oxygen, nitrous oxide, or air delivery, or mechanical ventilation failure. Alarms and error messages function as designed.
- Datex - Ohmeda, IncTerminatedOct 6, 2008
The electronic vaporization system in the GE Aisys Anesthesia machine contains the following components: Backpressure Valve, Inflow Check Valve and Cassette Interface Board, that can contribute to independent failures.
- Draeger Medical, Inc.TerminatedSep 23, 2008
The parent company became aware of instances where the lower side rail of the frame of the machine broke inwards when being moved across a threshold; resulting in the machine being unstable.
- Draeger Medical, Inc.TerminatedJul 16, 2008
Detachment of Component: The chassis on some machines were manufactured out of specifications. As a result, the caster may break loose from the chassis.
- MAQUET Inc.TerminatedSep 7, 2007
Overcharging of batteries and the release of acid fumes
- Datex - Ohmeda, IncTerminatedDec 19, 2006
Certain Compact Absorbers may have an increased resistance to gas flow due to an improperly manufactured foam filter. The increased resistance can cause an elevated pressure at the ventilator end of the inspiratory circuit, but the pressure at the patient may be reduced. This could result in patient hypoventilation and hypoxia.
- Datex - Ohmeda, IncTerminatedNov 7, 2006
Vaporizer shutdown with alarm-An intermittent leak in the Aladin 2 cassette/Aisys pneumatic interface (valves) may occur that will invoke an alarm state. When this occurs 'Vaporizer Failure' will appear on the Aisys main display, with an accompanying audible alrm. Delivery of anesthetic Agent is halted; gas flow and ventilation are not affected.
- Draeger Medical, Inc.TerminatedOct 19, 2006
One of four casters may break loose from chassis
- GE HealthcareTerminatedJul 12, 2006
There exists the possibility that the ADU Fresh Gas Control unit (A-FGC1) can shut off during normal handling of the anesthesia machine and result in no anesthetic agent output.
- Datascope CorpTerminatedJun 2, 2006
The Anestar and Anestar Plus Anesthesia System may produce periods of high Positive End-Expiratory Pressure (PEEP), in both manual and mechanical ventilation mode due to an issue with the Applied Pressure Limit (APL) valve.
- GE HealthcareTerminatedMay 9, 2006
Alarm sound-It is possible that the audible alarms from the speaker from the Datex-Ohmeda S/5 Anesthesia Delivery Unit (ADU) machine may dampen or disappear as a result of normal handling of the anesthesia machine. Visual alarms on the ADU are unaffected by this condition. The dampening or absence of audible alarms on the ADU may result in a delay in treatment.
- Datex-Ohmeda IncTerminatedOct 12, 2005
Two conditions may occur with the S/5 Aespire Anesthesia System. The internal auxiliary flowmeter tubing may become disconnected if the auxiliary oxygen supply tubing is occluded and the patient may not receive desired supplemental oxygen which could lead to serious injury if undetected. Also the O2 switch may leak or fail.
- Datex-Ohmeda IncTerminatedOct 12, 2005
Two conditions may occur with the S/5 Aespire Anesthesia System. The internal auxiliary flowmeter tubing may become disconnected if the auxiliary oxygen supply tubing is occluded and the patient may not receive desired supplemental oxygen which could lead to serious injury if undetected. Also the O2 switch may leak or fail.
- Datex-Ohmeda IncTerminatedOct 12, 2005
Two conditions may occur with the S/5 Aespire Anesthesia System. The internal auxiliary flowmeter tubing may become disconnected if the auxiliary oxygen supply tubing is occluded and the patient may not receive desired supplemental oxygen which could lead to serious injury if undetected. Also the O2 switch may leak or fail.
- Draeger Medical, Inc.TerminatedNov 11, 2004
rotating knob of the rotary style APL valve can become separated from the assembly.
- Datascope CorpTerminatedSep 9, 2004
Failure of the Anestar AC Main Power Switch. Battery should last 30 minutes, then ventilation and monitoring will fail.
- Datex-Ohmeda IncTerminatedJul 20, 2004
Anesthetic agents could be delivered at concentrations above the concentration set on the S/5 and AS/3 Anesthesia Delivery Units (ADU) having serial numbers within a specified range.
- Datex-Ohmeda IncTerminatedAug 28, 2003
Possible disruption of mechanical ventilation or disruption of anesthetic agent delivery.
- GE Healthcare, LLCTerminatedUnknown
Certain Aespire and Aestiva Anesthesia Systems were noted to have a vulnerability to a cyber-attack when connected to the hospital network. An insufficiently secured terminal server may provide an opportunity for a malicious actor that has already penetrated the hospital network to send fraudulent flow sensor correction parameters.
- GE Healthcare, LLCTerminatedUnknown
Certain Aespire and Aestiva Anesthesia Systems were noted to have a vulnerability to a cyber-attack when connected to the hospital network. An insufficiently secured terminal server may provide an opportunity for a malicious actor that has already penetrated the hospital network to send fraudulent flow sensor correction parameters.
- GE Healthcare, LLCTerminatedUnknown
Certain Aespire and Aestiva Anesthesia Systems were noted to have a vulnerability to a cyber-attack when connected to the hospital network. An insufficiently secured terminal server may provide an opportunity for a malicious actor that has already penetrated the hospital network to send fraudulent flow sensor correction parameters.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Flow sensors could have damaged tubes in the form of small punctures or cuts.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Flow sensors could have damaged tubes in the form of small punctures or cuts.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Flow sensors could have damaged tubes in the form of small punctures or cuts.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Flow sensors could have damaged tubes in the form of small punctures or cuts.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Flow sensors could have damaged tubes in the form of small punctures or cuts.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Flow sensors could have damaged tubes in the form of small punctures or cuts.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Flow sensors could have damaged tubes in the form of small punctures or cuts.
- Getinge Usa Sales IncOpen, ClassifiedUnknown
A potential chemical degradation of Sevoflurane by Lewis acids (metal oxides and metal halides) has been discovered that may result in inhalation and/or skin exposure of hydrogen fluoride.
- Draeger Medical, Inc.TerminatedUnknown
26 Fabius MRI Anesthesia machines were distributed with internal hoses routing Oxygen to the Oxygen Flush and Oxygen Flow Control interchanged. If the hospital O2 Central supply pressure is not stable, the O2 fresh gas flow could deviate from the adjusted value. If the deviation is not noticed, insufficient oxygenation of the patient may occur.
- GE Medical Systems China Co., Ltd.Open, ClassifiedUnknown
Possible incomplete seal between the CO2 absorber and the breathing circuit CO2 bypass port assembly of the Carestation 600 Series systems.
- GE Medical Systems China Co., Ltd.Open, ClassifiedUnknown
Possible incomplete seal between the CO2 absorber and the breathing circuit CO2 bypass port assembly of the Carestation 600 Series systems.
- GE Healthcare, LLCTerminatedUnknown
GE Healthcare has become aware of a potential safety issue where certain Avance CS2, Avance and Amingo anesthesia devices can transition to a System Malfunction state if the lower storage drawer containing the optional large tray insert accessory closed with an abnormally high amount of force.
- Mindray DS USA, Inc. dba Mindray North AmericaTerminatedUnknown
A software issue may result in the previous settings being applied instead of the default settings or the unit may skip the startup leak test.
- Mindray DS USA, Inc. dba Mindray North AmericaTerminatedUnknown
A software issue may result in the previous settings being applied instead of the default settings or the unit may skip the startup leak test.
- Getinge Group Logistics America, LLCTerminatedUnknown
Maquet Critical Care AB received complaints where the FiCO2 value was not zero or as close to zero as expected and/or experienced System Check Out failures when docking the absorber to the Flow i Anesthesia machine.
- GE Healthcare, LLCTerminatedUnknown
Non-Conforming devices were shipped from the service center without proper evaluation and therefore may be nonconforming.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Backup batteries can fail earlier than their estimated life.
- GE Healthcare, LLCOpen, ClassifiedUnknown
Backup batteries can fail earlier than their estimated life.
- GE Medical Systems, LLCTerminatedUnknown
GE Healthcare has recently become aware of a potential safety issue involving a momentary, self-correcting anesthetic agent bolus when using 21% oxygen on all Aisys CS2 and upgraded Aisys anesthesia devices.
- GE Medical Systems, LLCTerminatedUnknown
GE Healthcare has recently become aware of a potential safety issue involving a momentary, self-correcting anesthetic agent bolus when using 21% oxygen on all Aisys CS2 and upgraded Aisys anesthesia devices.
- GE Healthcare, LLCOpen, ClassifiedUnknown
The base of the anesthesia system can have a crack and could potentially fracture resulting in a tip or overbalance of the anesthesia system. This can result in potential injury if it falls on a person.
- GE Medical Systems, LLCTerminatedUnknown
The vacuum suction tubing could be kinked within the machine resulting in suction less than the 20 lpm required by ISO 10079-3. This could result in inadequate suction performance to clear the airway and inadequate ventilation of the patient.
- Del Mar Reynolds Medical, Ltd.TerminatedUnknown
Reports of the Canister Carrier breaking during absorbent exchange or during anesthesia machine transit, causing a leak in the breathing circuit, which could cause hypoventilation in the patient.
- Draeger Medical, Inc.TerminatedUnknown
The Draeger anesthesia device may be able to dose 100% N2O. In the event of a fault, the S-ORC module would not prevent setting an N2O flow that would result in a hypoxic mixture from being dosed to the patient. Potential adverse outcomes include death of the patient.
- Draeger Medical, Inc.TerminatedUnknown
The Draeger anesthesia device may be able to dose 100% N2O. In the event of a fault, the S-ORC module would not prevent setting an N2O flow that would result in a hypoxic mixture from being dosed to the patient. Potential adverse outcomes include death of the patient.
- Draeger Medical, Inc.TerminatedUnknown
The Draeger anesthesia device may be able to dose 100% N2O. In the event of a fault, the S-ORC module would not prevent setting an N2O flow that would result in a hypoxic mixture from being dosed to the patient. Potential adverse outcomes include death of the patient.
- Draeger Medical, Inc.TerminatedUnknown
The Draeger anesthesia device may be able to dose 100% N2O. In the event of a fault, the S-ORC module would not prevent setting an N2O flow that would result in a hypoxic mixture from being dosed to the patient. Potential adverse outcomes include death of the patient.
- Draeger Medical, Inc.TerminatedUnknown
The Draeger anesthesia device may be able to dose 100% N2O. In the event of a fault, the S-ORC module would not prevent setting an N2O flow that would result in a hypoxic mixture from being dosed to the patient. Potential adverse outcomes include death of the patient.
- GE Healthcare, LLCOpen, ClassifiedUnknown
The flow sensors built prior to June 2021 could have damaged tubes with small punctures or cuts that could cause leaks resulting in incorrect anesthesia machine tidal volumes potentially leading to over-delivery of volume to the patient.
- GE Healthcare, LLCOpen, ClassifiedUnknown
The flow sensors built prior to June 2021 could have damaged tubes with small punctures or cuts that could cause leaks resulting in incorrect anesthesia machine tidal volumes potentially leading to over-delivery of volume to the patient.
- Mindray DS USA, Inc. dba Mindray North AmericaTerminatedUnknown
Potential for a leak to occur on the back-up O2 and air e-size cylinder yokes on the A7 Anesthesia Delivery System.
- Beckman Coulter Inc.TerminatedUnknown
Beckman Coulter is recalling the UniCel DxH Slidemaker Stainer Coulter Cellular Analysis System to reduce the potential for flammable liquids coming into contact with electrical components in the Stainer module possibly causing a fire.
- GE Medical Systems China Co., Ltd.TerminatedUnknown
On systems equipped with the Auxiliary Common Gas Outlet (ACGO), there is a potential for the auxiliary gas switch to unexpectedly switch from the ACGO position back to the circle position. On systems equipped with the Aux O2 + Air function the switch could unexpectedly switch from the Aux O2 + Air position back to the circle position. These situations could lead to hypoxia.
- GE Medical Systems China Co., Ltd.TerminatedUnknown
On systems equipped with the Auxiliary Common Gas Outlet (ACGO), there is a potential for the auxiliary gas switch to unexpectedly switch from the ACGO position back to the circle position. On systems equipped with the Aux O2 + Air function the switch could unexpectedly switch from the Aux O2 + Air position back to the circle position. These situations could lead to hypoxia.
- GE Medical Systems China Co., Ltd.TerminatedUnknown
On systems equipped with the Auxiliary Common Gas Outlet (ACGO), there is a potential for the auxiliary gas switch to unexpectedly switch from the ACGO position back to the circle position. On systems equipped with the Aux O2 + Air function the switch could unexpectedly switch from the Aux O2 + Air position back to the circle position. These situations could lead to hypoxia.