Safety interface for medical gas delivery systems

Abstract

A safety interface for a medical gas delivery system is provided, comprising a gas sensor operably interfacing the supply line of the system. The interface is configured to detect the presence of an incorrect gas type in the supply line using the gas sensor. In embodiments, upon detection of an incorrect gas type, the interface can activate a shut-off solenoid valve to close the supply line, thereby preventing the delivery of the incorrect gas. This system ensures accurate and safe delivery of medical gases to patients.

Description

Safety Interface for Medical Gas Delivery SystemsField of the Invention

[0001] The present invention relates to medical gas delivery systems, specifically to a safety interface designed to detect and prevent the incorrect delivery of medical gases. This system is used in various healthcare settings, such as hospital wards and operating theatres, to ensure the safe and accurate delivery of medical gases, including but not limited to oxygen, nitrous oxide, and medical air. The invention encompasses gas detection, automated shut-off mechanisms, and remote monitoring features to enhance patient safety and system reliability.Background of the Invention

[0002] Medical gas delivery systems are essential in healthcare settings, providing vital gases such as oxygen, nitrous oxide, medical air, and others to patients in various medical conditions. These gases are delivered through a network of supply lines and outlets in hospital wards, operating theatres, and other clinical environments. Ensuring the correct type of gas is delivered is critical, as the inadvertent delivery of the wrong gas can lead to serious injury or death.

[0003] Traditional medical gas delivery systems typically involve manual checks and basic mechanical devices to ensure the correct gas is delivered. However, these methods are prone to human error and mechanical failure. Incidents of gas line cross- connections or switching of gas supplies have been reported, leading to severe consequences.

[0004] Therefore, there is a need for way to prevent the incorrect delivery of medical gases, enhancing patient safety and ensuring reliable operation in medical facilities.Summary of the Disclosure

[0005] The described medical gas delivery safety interface is designed to ensure that only the correct type of gas is delivered through the supply lines, preventing any potential harm to patients due to gas delivery errors. The system comprises a supply line interfacing an outlet in a delivery panel and a gas supply. The safety interfaceincludes a gas sensor operably interfacing the supply line, configured to detect the presence of an incorrect gas type in the supply line.

[0006] The safety interface may further comprise a shut-off solenoid valve interfacing the supply line, which is configured to shut off the supply line using the solenoid valve when the gas sensor detects the presence of an incorrect gas type. This feature ensures immediate cessation of incorrect gas delivery. The solenoid valve may be configured to vent remnant gas between the valve and the outlet to the atmosphere, preventing any residual incorrect gas from being delivered.

[0007] The safety interface may comprise a pressure sensor and may be configured to only detect a type of gas in the supply line when the pressure exceeds a threshold. This prevents false alarms when the supply line is not connected to a gas supply.

[0008] The gas sensor may be configured to detect a specified type of gas, ensuring accurate identification of the gas being delivered.

[0009] The sensor may be configured to detect a plurality of types of gases, with the interface configured for a specified type of gas. Additionally, the interface may include a controller operably interfacing the sensor, programmed with the specified type of gas, allowing for flexible system configuration.

[0010] The gas sensor may be concealed behind the panel for protection it may also be located within 500 mm from the outlet to ensure prompt detection and response and minimise any incorrect gas delivery. The solenoid valve may similarly be located within 500 mm from the outlet, ensuring rapid shut-off in case of incorrect gas detection.

[0011] The gas sensor and the outlet may be integrally housed as a unit configured to be installed in the panel, making installation straightforward and secure. This unit can be configured with the specified type of gas.

[0012] A user interface may be included, interfacing with the panel, to indicate detection of an incorrect gas type, providing clear and immediate alerts to medical staff.

[0013] The system may comprise a signal output configured to output a signal when detecting the presence of a type of gas in the supply line other than the specified type for the outlet. This facilitates remote monitoring and alerting.

[0014] The safety interface may include a remote monitoring system configured for remote monitoring of gas delivery statuses. This system can deliver alerts in real-time via a connected device, ensuring timely intervention.

[0015] The interface may be configured to periodically check the functionality of the sensor, maintaining reliability and accuracy over time. It may also periodically check the functionality of the solenoid valve, ensuring consistent performance.

[0016] Automated calibration of the gas sensor may be provided, enhancing accuracy and reducing maintenance needs. The interface may be configured to automatically shut down gas delivery in case of a detected sensor failure, ensuring safety.

[0017] A redundant gas sensor may be included to cross-verify the type of gas in the supply line, ensuring accurate detection. The system may confirm correct gas delivery only if both the gas sensor and the redundant gas sensor detect the specified type of gas.

[0018] The safety interface may include a battery backup system to ensure continuous operation during power failures. It may also implement a lockout mechanism that prevents reactivation of the gas supply line until the interface is reset after detecting an incorrect gas type, adding an extra layer of safety.

[0019] The interface may log data to record instances of incorrect gas detection, system status, and actions taken, providing valuable information for analysis and improvement.

[0020] The gas sensor may be modular, allowing easy replacement and upgrading. Similarly, the solenoid valve may be modular, facilitating periodic servicing and replacement.

[0021] A temperature sensor interfacing with the supply line may be included, ensuring that the gas delivered is within safe operational temperatures.

[0022] Other aspects of the invention are also disclosed.Brief Description of the Drawings

[0023] Notwithstanding any other forms which may fall within the scope of the present invention, preferred embodiments of the disclosure will now be described, by way of example only, with reference to the accompanying drawings in which:

[0024] Figure 1 shows a schematic of a safety interface for a medical gas delivery system in accordance with an embodiment.Description of Embodiments

[0025] Figure 1 shows a safety interface 100 for a medical gas delivery system. A conventional medical gas delivery system comprises a supply line 107 interfacing an outlet 101 in a delivery panel 108 located in a hospital ward, theatre, or the like. A gas supply, such as bottled gas, is connected to the supply line 107 to deliver medical gas via the outlet 101. The outlet 101 typically comprises a quick hose coupling to which a delivery hose can be attached to deliver gas via a facial mask or similar device. Common types of gases supplied in a medical setting include oxygen (O2) for patient respiration, nitrous oxide (N2O) for anaesthesia and analgesia, medical air for respiratory support, carbon dioxide (CO2) for laparoscopic procedures, nitrogen (N2) for driving surgical tools, and helium (He) for patients with airway obstruction.

[0026] The safety interface 100 comprises a gas sensor 105 operably interfacing the supply line 107. The interface 100 is configured to detect the presence of an incorrect gas type in the supply line 107 using the gas sensor 105. For example, the interface 100 may be configured to detect nitrous oxide in a system intended to deliver oxygen.

[0027] In a preferred embodiment, the interface 100 further comprises a shut-off solenoid valve 106 interfacing the supply line 107. In this embodiment, the interface 100 is configured to shut off the supply line 107 using the shut-off solenoid valve 106 when detecting the presence of an incorrect gas type using the gas sensor 105. Preferably, the shut-off solenoid valve 106 is located relatively close to the outlet 101 , such as within 500 mm, to minimise the volume of incorrect gas that may be supplied in the event of shut-off. In some embodiments, the solenoid valve 106 may be configured to vent remnant gas between the valve 106 and the outlet 101 to the atmosphere, thereby preventing any remnant gas delivery via the outlet 101.

[0028] In certain embodiments, the interface 100 comprises a pressure sensor operably interfacing the supply line 107, and the interface 100 is configured to only detect the type of gas in the supply line 107 when the pressure exceeds a threshold. This ensures that the interface 100 does not generate false alarms when the supply line 107 is not connected to a gas supply.

[0029] Optionally, the gas sensor 105 is specifically configured to detect a specified type of gas, and the interface 100 detects incorrect gas delivery when the gas sensor 105 fails to detect the specified type of gas. For example, the gas sensor 105 may be an oxygen sensor installed in an oxygen delivery supply line 107. Failure of the oxygen sensor 105 to detect the presence of oxygen would allow the interface 100 to detect incorrect gas delivery.

[0030] In another embodiment, the interface 100 may have a modular design wherein the gas sensor 105 can be modularly inserted and replaced without replacing the components of the interface 100. This allows a specific type of gas sensor 105 to be installed depending on the type of gas to be delivered by the supply line. The solenoid valve 106 may also be modular, allowing for periodic servicing and / or replacement.

[0031] In alternative embodiments, the sensor 105 is a multi-gas sensor configured to detect a plurality of types of gases, and the interface is configured with a specified type of gas for delivery. In this embodiment, the sensor 105 may detect the presence of the specified type of gas to confirm correct operation and detect one or more incorrect types of gas to identify incorrect delivery. The interface may be configured to detect incorrect gas delivery when the sensor 105 detects a gas type other than the specified type or when the sensor 105 cannot determine the gas type. This failsafe mechanism ensures that the interface 100 confirms correct delivery only when the multi-gas sensor 105 detects the specified type of gas.

[0032] The embodiment shown in Figure 1 illustrates a digital implementation where the system 100 comprises a controller 104 operably interfacing the sensor 105 and the shut-off valve 106. The controller 104 may include a microprocessor configured for processing digital data, operably connected to a memory device programmed with computer code instructions and associated data. In use, the microprocessor fetchesthese instructions and data to implement the safety features described herein. These instructions may be logically divided into multiple controllers, such as a gas type determination controller interfacing with the gas sensor 105 and a shut-off controller interfacing with the shut-off solenoid valve 106.

[0033] In some embodiments, the gas sensor 105 and the outlet 101 are integrally housed as a unit installed in the panel 108. This unit may also house the solenoid valve 106. The interface 100 can be modularly installed as a single tamperproof unit, which can be replaced and / or serviced when required. The unit itself may be configured with the specified type of gas during installation in a tamperproof manner, such as through internal dip switches configured for the type of gas to be supplied or through an electronic interface with password protection or similar authentication for configuration.

[0034] The interface 100 may comprise one or more signal outputs 103, which can be used to signal events including incorrect gas delivery. The signal output 103 can be a 4-20 mA current loop interfacing with associated electronic componentry, such as a nurse alarm station or gas alarm panel. Alternatively, the signal output 103 may transmit data via a packetised data network, enabling automated generation of electronic alerts like SMS, push notifications, and emails.

[0035] Optionally, the interface 100 includes a user interface 102 indicating detection of an incorrect gas type. In the embodiment shown, the user interface 102 is a bicoloured LED operated green to indicate correct gas type delivery or red to indicate incorrect gas type detection. Further embodiments may feature a digital display controlled by the controller 104 to show digital information, potentially with a haptic overlay to receive touch gestures. This user interface 102 can confirm correct gas type delivery, configure the specified type of gas, reset the interface, and perform other functions.

[0036] A remote monitoring system may operably interface with the interface 100, allowing for remote monitoring of gas delivery statuses. It may deliver real-time alerts via connected devices, such as mobile phones with a dedicated software application.

[0037] The interface 100 may be configured to periodically check the functionality of the sensor 105 to ensure correct operational detection. It may also automatically calibrate the sensor 105. Additionally, the interface 100 can periodically check the functionality of the solenoid valve 106. For instance, when not supplying gas, the controller 104 may close the solenoid valve 106 and simultaneously monitor the pressure reading from the pressure sensor to confirm proper closing of the solenoid valve 106.

[0038] In embodiments, the interface 100 can automatically shut down gas delivery in case of detected failure of the sensor 105 and / or the solenoid valve 106. In some embodiments, the interface 100 comprises a redundant gas sensor 105 to cross-verify the type of gas in the supply line 107, confirming correct gas delivery if both sensors detect the specified type of gas.

[0039] The interface may include a battery backup system to ensure continuous operation during power failures. It may also implement a lockout mechanism that prevents reactivation of the gas supply line 107 after detecting an incorrect gas type, requiring resetting by authorised personnel.

[0040] In some embodiments, the interface includes a temperature sensor interfacing with the supply line 107 to confirm safe operational gas temperatures.

[0041] In an example method of use in accordance with an embodiment, the safety interface 100 is installed in a medical gas delivery system to ensure the correct type of gas is delivered through the outlet 101. When a gas supply is connected to the supply line 107, the gas sensor 105 continuously monitors the type of gas. If the sensor detects the specified type of gas, the system allows the gas to be delivered through the outlet 101. If an incorrect gas type is detected, the sensor signals the controller 104, which then activates the shut-off solenoid valve 106 to close the supply line 107. The user interface 102 alerts medical staff with a visual or audible signal indicating the incorrect gas type. The interface 100 may also send remote alerts via the signal output 103 to a central monitoring station or mobile devices. The safety interface 100 periodically checks the functionality of the sensor and solenoid valve, ensuring they are operating correctly. If a failure is detected, the interface 100 shutsdown the gas delivery system and logs the incident for future analysis. Authorised personnel can reset the interface 100 after addressing the issue, ensuring the interface 100 is ready for safe operation.

[0042] The foregoing description, for purposes of explanation, used specific nomenclature to provide a thorough understanding of the invention. However, it will be apparent to one skilled in the art that specific details are not required in order to practise the invention. Thus, the foregoing descriptions of specific embodiments of the invention are presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed as obviously many modifications and variations are possible in view of the above teachings. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. It is intended that the following claims and their equivalents define the scope of the invention.

Claims

Claims1. A safety interface for a medical gas delivery system, the medical gas delivery system comprising a supply line interfacing an outlet in a delivery panel and a gas supply, the safety interface comprising a gas sensor operably interfacing the supply line and wherein the safety interface is configured to detect the presence of an incorrect gas type in the supply line using the gas sensor.

2. The safety interface according to claim 1 , further comprising a shut-off solenoid valve interfacing the supply line and wherein the safety interface is configured to shut off the supply line using the shut-off solenoid valve when detecting the presence of an incorrect gas type in the supply line using the gas sensor.

3. The safety interface according to claim 2, wherein the shut-off solenoid valve is configured to vent remnant gas between the valve and the outlet to atmosphere.

4. The safety interface according to claim 1 , wherein the safety interface comprises a pressure sensor and wherein the safety interface is configured to only detect a type of gas in the supply line when the pressure exceeds a threshold.

5. The safety interface according to claim 1 , wherein the gas sensor is configured to detect a specified type of gas.

6. The safety interface according to claim 1 , wherein the gas sensor is configured to detect a plurality of types of gases and wherein the safety interface is configured with a specified type of gas.

7. The safety interface according to claim 6, further comprising a controller operably interfacing the gas sensor and wherein the controller is programmed with the specified type of gas.

8. The safety interface according to claim 1 , wherein the gas sensor is concealed behind the panel.

9. The safety interface according to claim 1 , wherein the gas sensor is located within 500 mm from the outlet.

10. The safety interface according to claim 2, wherein the shut-off solenoid valve is located within 500 mm from the outlet.

11. The safety interface according to claim 1 , wherein the gas sensor and the outlet are integrally housed as a unit which is configured to be installed in the panel.

12. The safety interface according to claim 11 , wherein the unit is configurable with the specified type of gas.

13. The safety interface according to claim 1 , further comprising a user interface interfacing the panel which indicates detection of an incorrect gas type.

14. The safety interface according to claim 1 , further comprising a signal output configured to output a signal when detecting the presence of a type of gas in the supply line other than the specified type of gas for the outlet.

15. The safety interface according to claim 1 , further comprising a remote monitoring system operably interfacing the safety interface configured for remote monitoring of gas delivery statuses.

16. The safety interface according to claim 15, wherein the remote monitoring system is configured to deliver alerts in real-time via a connected device.

17. The safety interface according to claim 1 , wherein the safety interface is configured to periodically check the functionality of the gas sensor.

18. The safety interface according to claim 2, wherein the safety interface is configured to periodically check the functionality of the shut-off solenoid valve.

19. The safety interface according to claim 1 , wherein the safety interface is configured for automated calibration of the gas sensor.

20. The safety interface according to claim 1 , wherein the safety interface is configured to automatically shut down gas delivery in case of a detected sensor failure.

21. The safety interface according to claim 1 , further comprising a redundant gas sensor used to cross-verify the type of gas in the supply line.

22. The safety interface according to claim 21 , wherein the safety interface is configured to only confirm correct gas delivery if both the gas sensor and the redundant gas sensor detect the specified type of gas.

23. The safety interface according to claim 1 , further comprising a battery backup system.

24. The safety interface according to claim 1 , wherein the safety interface implements a lockout mechanism that prevents reactivation of the gas supply line until the safety interface is reset after detecting an incorrect gas type.

25. The safety interface according to claim 1 , wherein the safety interface logs data to record at least one of instances of incorrect gas detection, system status, and actions taken.

26. The safety interface according to claim 1 , wherein the gas sensor is modular.

27. The safety interface according to claim 2, wherein the shut-off solenoid valve is modular.

28. The safety interface according to claim 1 , further comprising a temperature sensor interfacing the supply line.

29. The safety interface according to claim 6, wherein the interface is configured to detect incorrect gas delivery when the sensor detects a gas type other than the specified type or when the sensor cannot determine a gas type.

Images