• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SECONDARY LINE CLEANING SYSTEM AND METHOD FOR CLEANING A SECONDARY LINE. Secondary line cleaning system (40) having blower (22) to pressurize a gas flow and a first pressure sensor (28) to measure a first pressure of gas flow in or near the blower. The system further includes a secondary line (36) that communicates with the blower and an individual circuit (32). The system further includes a second pressure sensor (30) for measuring a second pressure of the gas flow within the secondary line. A valve system (42) is operable in 1) a first mode of operation to isolate the blower from the branch line and 2) a second mode of operation to allow communication between the blower to the branch line to clear the secondary line of obstructions with the pressurized gas flow. A controller (16) switches operation of the valve system between the first operating mode and the second operating mode, based on the first pressure and the second pressure.
    公开号:BR112013009905B1
    申请号:R112013009905-4
    申请日:2011-10-19
    公开日:2021-05-18
    发明作者:Samir Ahmad
    申请人:Koninklijke Philips N.V.；
    IPC主号:
    专利说明:

    HISTORY OF THE INVENTION 1. FIELD OF THE INVENTION
    [001] The invention relates to a pressure or secondary line cleaning system and method for a mechanical fan. 2. DESCRIPTION OF RELATED TECHNIQUE
    [002] Ventilators are generally used to ventilate a patient's lungs with breathing gas to assist the individual in breathing. The ventilator may be operably connected to a subject circuit that is adapted to communicate gas flow to a subject airway at a subject interface. A pressure line may be operatively connected to the ventilator and may be in fluid communication with the subject circuit at or near the subject interface. A sensor is typically provided and detects the pressure of the gas flow within the pressure line. Pressure measurements are used to monitor the individual's pressure, perform breaths, and in calculations of parameters in lung mechanics, such as calculation of breath work and lung compliance. Pressure measurements can also be used to help control the support provided by a ventilator to assist the individual in breathing.
    [003] However, during use, the pressure lines may become clogged with fluid (eg, water and/or mucosa) from the individual. Obstruction can result in erroneous airway pressure readings. Certainly, there may be insufficient ventilation of the individual. In addition, water and/or the individual's mucosa may also flow through the pressure line and into the ventilator, which may interfere with ventilator operation.
    [004] Conventional cleaning systems for cleaning the clogging pressure line are known. Conventional cleaning systems typically include a separate compressor or secondary source of pressurized gas to clean the pressure lines. Thus, these conventional cleaning systems can generally be bulky, complicated and expensive to manufacture. US 2006/249153 discloses a portable mechanical ventilator with a Roots blower configured to deliver a desired gas flow and pressure to a patient circuit. Document US 2010/051026 discloses a system and methods for purging narrow diameter sensor tubes in a ventilation system. Document US 6 203 502 discloses a respiratory function monitoring device comprising a flow sensor and a conversion device. US 2004/003814 discloses an endotracheal tube pressure monitoring system for an endotracheal tube having at least a pressure sensor in communication with a main lumen of the endotracheal tube and a pressure monitoring subsystem in operative communication with the pressure sensor . SUMMARY OF THE INVENTION
    [005] One aspect of the invention relates to a secondary line cleaning system having a blower configured to pressurize a gas stream to deliver to an individual. The blower includes a variable speed motor connected to a fan having an output. The secondary line cleaning system also includes a first pressure sensor configured to measure a first pressure of the gas flow at or near the blower and a subject circuit operatively connected to the outlet. The subject circuit is adapted to communicate gas flow to an individual's airway at a subject interface. The system also includes a secondary line in fluid communication with the blower and the subject circuit at or near the subject interface. The system further includes a second pressure sensor configured to measure a second pressure of the gas flow within the secondary line. A valve system is configured to be operable in 1) a first mode of operation to isolate the blower from the secondary line and 2) a second mode of operation to allow fluid communication between the blower to the secondary line to clear the secondary line of obstructions. with pressurized gas flow. A controller is configured to switch operation of the valve system between the first mode of operation and the second mode of operation, based on the first pressure and the second pressure, so that the valve system is placed in the second receptive operating mode to a difference between the first pressure and the second pressure that breaks a limit.
    [006] Another aspect of the invention relates to a method for cleaning a secondary line, the method includes the step of pressurizing a gas stream to administer to an individual. The pressurized gas flow is provided by a blower comprising a variable speed motor connected to a fan having an outlet. The method also includes steps to communicate gas flow to an individual's airway at an individual's interface. Communication is provided by an individual circuit operatively connected to the output. The method further includes the steps of detecting a first gas flow pressure at or near the blower and detecting a second gas flow pressure within a secondary line that is in fluid communication with the blower and the subject circuit at the interface of the individual or close to it. The method also includes controlling the operation of a valve system between 1) a first mode of operation to isolate the blower from the branch line and 2) a second mode of operation to allow fluid communication between the blower to the branch line to clean the branch line. of obstructions with the pressurized gas flow, based on the first pressure and the second pressure, so that the valve system is placed in the second operating mode responsive to a difference between the first pressure and the second pressure that breaks a limit.
    [007] Yet another aspect of the invention relates to a secondary line cleaning system having means for pressurizing a gas stream to administer to an individual. The pressurized gas flow is provided by a blower comprising a variable speed motor connected to a fan having an outlet. The system also includes means for communicating gas flow to an individual's airway at an individual's interface. The means for communication is provided by an individual circuit operatively connected to the output. The system also includes means for sensing a first pressure of the gas flow in or near the blower and means for sensing a second pressure of the gas flow within a secondary line that is in fluid communication with the blower and the individual's circuitry in the interface of the individual or close to it. The system further includes means for controlling the operation of a valve system between 1) a first mode of operation to isolate the blower from the branch line and 2) a second mode of operation to allow fluid communication between the blower and the branch line to clean the secondary line of obstructions with the pressurized gas flow, based on the first pressure and the second pressure, so that the valve system is placed in the second operating mode receptive to a difference between the first pressure and the second pressure that breaks a limit.
    [008] These and other objectives, functions and characteristics of the present invention, as well as the methods of operation and functions of the related elements of the structure and the combination of parts and manufacturing economies, will become more evident in considering the following description and the appended claims with reference to the accompanying drawings, all of which form a part of this specification, wherein like reference numerals designate corresponding parts in the various figures. In one embodiment of the invention, the structural components illustrated here can be considered drawn to scale. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and not a limitation of the invention. Furthermore, it should be noted that the structural functions shown or described in one embodiment here can be used in other embodiments as well. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the invention. As used in the specification and claims, the singular form of “a”, “an”, “the” and “a” includes plural referents unless the context clearly dictates otherwise. BRIEF DESCRIPTION OF THE DRAWINGS
    [009] Figure 1 illustrates a gas delivery system having a secondary line cleaning system according to an embodiment;
    [0010] Figure 2 illustrates a graph of a first pressure detected by a first pressure sensor and a second pressure detected by the second pressure sensor according to an embodiment; and
    [0011] Figure 3 illustrates an operation of the cleaning system according to an embodiment. DETAILED DESCRIPTION OF THE EXEMPLARY ACHIEVEMENT
    [0012] Figure 1 illustrates a system 10 configured to deliver a pressurized flow of respiratory gas into the airway of an individual 12. The gas delivery system 10 includes a ventilator 14 that provides the pressurized flow of respiratory gas into the airway of the subject 12 such that one or more gas parameters of the pressurized respiratory gas flow provide therapeutic benefit to the individual 12. In one embodiment, the system 10 is configured so that the pressurized respiratory gas flow supports the individual 12's airway for allow individual 12 to breathe. In one embodiment, system 10 is configured so that subject 12's breathing is mechanically aided by the pressurized flow of respiratory gas. To improve efficiency in facilitating breathing by subject 12, the subject's respiratory parameters and/or other parameters are detected and implemented by controlling the support provided by ventilator 14. Ventilator 14 includes one or more of a blower 22, a valve of control 26, a patient port 34, a proximal pressure port 38, a first pressure sensor 28, a second pressure sensor 30, a valve system 42, a controller 16, and/or other components.
    [0013] The gas delivery system 10 includes a pressure generator including blower 22 that receives a breath supply from a source of respiratory gas (not shown) and raises the pressure of this gas to deliver to the individual's airway 12. The gas source can be provided in the same housing as the fan 14, or it can be separate and connected to it. In accordance with some embodiments, the breathing gas from the gas source is delivered with supplemental oxygen from an oxygen source to raise the level of oxygen concentration in the gas delivered to the subject 12. This may include mixing the breathing gas from the gas source. with supplemental oxygen in ventilator 14, or downstream of ventilator 14. The breathing gas to deliver to the patient can be any breathing gas such as air, oxygen, or a mixture of oxygen (eg, helium). The breathing gas can also include a mixture of a breathing gas and a drug, which can be in gaseous (eg, nitric acid) or nebulized form.
    [0014] Blower 22 includes a variable or constant speed motor (not shown) connected to a fan (not shown) having an output 24. In one embodiment, the speed of blower 22 can be rapidly increased or decreased depending on a flow rate desired. This allows each inhalation and exhalation to be controlled more flexibly. For example, the blower 22 allows the gas flow to change rapidly to allow the fan to vary the flow several times or continuously within the span of a single breath. Of course, ventilator 14 can make rapid and repeated adjustments to reliably respond to the patient's breathing parameters or other parameters.
    [0015] The high pressure flow of breathing gas from blower 22 is administered to control valve 26 downstream of blower 22. Control valve 26, alone or in combination with blower 22, controls the final pressure or gas flow coming out of the ventilator 14. Examples of a suitable pressure/flow controller include at least one valve, such as a sleeve or trigger valve, that vents gas from the patient circuit as a method of controlling pressure in the patient circuit. Other suitable pressure/flow controllers are believed to be well known to those skilled in the art. Some embodiments (not described) may not include control valve 26. In such embodiments, the final pressure exiting the pressure/flow generating system is controlled by blower 22.
    [0016] In embodiments where blower 22 is a blower that always operates at one speed only, control valve 26 alone may be used to control the final pressure and flow rate for the respiratory gas delivered to the patient. In some embodiments, however, the operating speed of blower 22 is controlled in combination with control valve 26 to control the final pressure and flow rate for respiratory gas delivered to the patient. For example, a pressure or flow close to the desired pressure or flow can be set by setting an appropriate operating speed for blower 22 with control valve 26 so that the two, operating together, determine the final pressure for the breathing gas delivered to the patient.
    [0017] Respiratory gas flow is carried from ventilator 14 to subject 12 through a subject circuit 32, which is typically a single flexible tube or channel that carries the breathing gas flow to a patient interface assembly 20. patient circuit 32 can be connected to output 24 of blower 22. Of course, gas from blower 22 can be communicated to individual circuit 32 through a patient port 34 provided on ventilator 14. Patient interface assembly 20 can include a patient interface equipment—invasive or non-invasive—such as a nasal mask/oral mask, full face mask, nasal cannula, endotracheal tube, or tracheal tube, suitable for communicating a supply of respiratory gas to a patient's airway. The patient interface assembly 20 may also include a headgear assembly, such as mounting straps or a bundle. The patient interface 20 assembly may also include controls therein, and other attributes. In some embodiments, the patient interface 20 and/or patient circuit 32 assembly may optionally include a suitable exhaust port (not shown) to exhaust gas from these components into the ambient atmosphere. The exhaust port may be a passive exhaust port in the form of a continuously open port that imposes a flow restriction on the exhaust gas to allow control of the gas pressure within the patient interface assembly 20. It should be understood, however, that the exhaust port can be an active exhaust port that takes different settings to control the exhaust rate.
    [0018] The system 10 also includes a pressure line 36 that is in fluid communication with the ventilator 14 and the subject circuit 18 at or near the subject interface assembly 20. The pressure line can be formed from a tubular channel. In one embodiment, pressure line 36 delivers a flow of gas to ventilator 14 through a proximal pressure port 38 on the ventilator to allow pressure at or near the subject interface assembly 20 to be determined...
    [0019] Sensors 28 and 30 are configured to determine one or more parameters associated with the breathing gas output. The first pressure sensor 28 is configured to measure a first pressure of the gas flow near or in the blower 22. The proximal pressure sensor 30 in the fan 14 is configured to measure the pressure of the gas flow within the pressure line 36. that the pressure line 36 communicates with the subject's circuit 32 in or near the subject's airway 12, the pressure measured by the proximal pressure sensor 30 (e.g., a second pressure) is the pressure of the gas flow. within the subject's circuit 32 at a location close to the subject's airway. Proximal pressure sensor 30 in ventilator 14 is configured to measure the pressure of the gas flow within pressure line 36.
    [0020] Other sensors may optionally be provided, such as sensors configured to determine one or more of the instantaneous volume of gas delivered to the patient, the instantaneous flow rate of the gas delivered to the patient, the pressure of the gas delivered to the patient, the temperature of the gas delivered to the patient. patient, the humidity of the gas administered to the patient, or any other parameter associated with the gas administered to the patient. Pressures sensed by sensors 28, 30 can be communicated to controller 16. In some embodiments, pressure sensors 28, 30 can generate pressure signals representative of the first and second pressure, and the pressure signals can be transmitted through a A/D converter (not shown) to controller 16. Pressure sensors 28, 30 can be any known pressure sensor, e.g. a pressure transducer, a piezo-resistive pressure sensor, a solid state pressure sensor , or any other type of sensor that can measure pressure and generate signals representative of the measured pressure.
    [0021] The electronic controller 16 controls the various operational aspects of the ventilator 14. For example, the outputs of sensors 28, 30 are provided to the controller 16 for processing, if necessary, to determine one or more parameters associated with the respiratory gas output . It should be noted that controller 16 may refer to a single controller or more than one controller. A control interface (not shown) may be used to provide data and commands to controller 16 of fan 14. The control interface may include any suitable device for providing information and/or commands to controller 16 over a wired or wireless connection. . Typical examples of the control interface might include a keyboard, numeric keypad, touch pad, mouse, microphone, switches, buttons, indicators or any other devices that allow a user to input information to the administration system 10. In one embodiment, the controller 16 comprises a processor that is suitably programmed with the algorithm or algorithms necessary to calculate the gas parameters (eg pressure, temperature, humidity, flow, etc.) to be applied to the gas administered to the patient in accordance with various ventilation modes.
    [0022] In one embodiment, the fan 14 optionally includes electronic storage (not shown) associated with the controller 16 to store the programming necessary to perform any one of a plurality of ventilation modes, depending on which ventilation mode is selected by the caregiver or patient using the control interface. Electronic storage can also store data relating to the operation of the gas management system 10, input commands, alarm limits, as well as any other information pertinent to the operation of the gas management system 10, such as measured gas flow values , volume, pressure, device usage, operating temperatures, and engine speed. In some embodiments, parameters and data obtained during operation of the gas delivery system 10 can be stored in electronic storage to provide a permanent record of parameters and data that pertain to the individual's course on ventilator 14, and allow for analysis of the operation of the gas administration system 10. Electronic storage may include storage that is integrally provided (i.e., substantially non-removable) and/or removable storage that is releasably connectable to system 10 through, for example, a port (eg a USB port, a firewire port, etc.) or a disk (eg a disk drive, etc.). Electronic storage 18 may include one or more of optically readable storage medium (e.g., optical disks, etc.), magnetically readable storage medium (e.g., magnetic tape, magnetic hard disk, floppy disk, etc.), media, charge-based storage (eg, EEPROM, RAM, etc.), solid-state storage media (eg, pen drive, etc.), and/or other electronically readable storage media. Electronic storage may store software algorithms, information determined by controller 16, information received through the user interface, and/or other information that allows the system 10 to function correctly. Electronic storage may be (as a whole or in part) a separate component within system 10, or electronic storage may be provided (as a whole or in part) integrally with one or more other components of system 10.
    [0023] A cleaning system 40 is provided in the gas delivery system 10 to clear the pressure line 36 of obstruction (e.g., water and/or mucosa). In one embodiment, cleaning system 40 includes one or more of blower 22, first pressure sensor 28, proximal pressure sensor 30, subject circuit 32, pressure line 36, valve system 42 provided between pressure line 36 and blower 22, controller 16, and/or other components. It should be noted that although the cleaning system 40 is described herein with respect to a pressure line, this is not intended to be limiting. The scope of this disclosure includes any secondary lines that communicate the circuit of subject 32 in or near the airway of subject 12 with ventilator 14.
    [0024] In one embodiment, the valve system 42 is disposed between the pressure line 36 and the blower 22 so that gas flow is communicated from the blower 22 to the pressure line 36 through the valve system 42. The system valve 42 is configured to be operable in 1) a first mode of operation to isolate blower 16 from pressure line 36 and 2) a second mode of operation to allow fluid communication between blower 16 to pressure line 36 to clear the pressure line 26 clogs with the pressurized gas flow. Flow of pressurized gas through blower 22 through pressure line 36 can remove obstructions within pressure line 36. That is, blower 22 allows an "opposite" pressurized gas flow through pressure line 36 to dislodge and remove any obstructions that might interfere with, block, or obstruct the normal flow of fluid through pressure line 36. Of course, this configuration allows cleaning of pressure line 36 without the use of a secondary compressor or other secondary sources of pressurized gas. However, it is noted that in some embodiments, a secondary source of pressurized gas may also be provided to facilitate the operations of the cleaning system 40.
    [0025] In some embodiments, controller 16 is configured to toggle valve system operation between the first mode of operation and the second mode of operation, based on the first pressure (i.e., the pressure in fan 14) detected by the first pressure sensor 28 and the second pressure (i.e., the proximal pressure) sensed by the proximal pressure sensor 30, so that the valve system 42 is placed in the second mode of operation responsive to a difference between the first pressure and the second pressure that breaks a limit. The valve system 42 can be placed in the second mode of operation responsive to the second pressure that exceeds the first pressure by the limit. In some embodiments, the threshold value may be approximately 2, 3, 4, 5, or 6 cm H20, although other values are observed. In some embodiments, the threshold value can be set by the user through the control interface. Alternatively or additionally, the limit value can be programmed in controller 16...
    [0026] In one embodiment, valve system 42 may include a solenoid. In such an embodiment, the solenoid valve may be controlled by electrical current applied to it by controller 16. In some embodiments, controller 16 may provide a pulsed modulated signal (PWM) to the solenoid. The solenoid may include two ports so that in the first mode of operation, the valve is switched to a closed configuration where gas flow through valve system 42 is impeded and in the second mode of operation (which may also be referred to as a cleaning operation), valve system 42 is switched to an open configuration where gas flow through valve system 42 is permitted. It should be noted, however, that this example is not intended to be limiting and that other electromechanical valves or other types of valves may be used.
    [0027] As shown in Figure 2, the first pressure in ventilator 14 is typically less than or equal to the pressure in pressure line 36 during exhalation. However, during inhalation, the first pressure in blower 14 may exceed the pressure in pressure line 36 at least by the limit, thus placing valve system 42 in the second mode of operation in which gas is allowed to flow from blower 22 to the line. of proximal pressure 36. However, this example is not intended to be limiting, and it is noted that the second mode of operation (ie, the cleaning operation) may occur at any time during exhalation or inhalation in other embodiments.
    [0028] Figure 3 illustrates a method 50 for cleaning the pressure line 36 according to an embodiment. The operations of method 50 presented below are intended to be illustrative. In some embodiments, method 50 can be performed with one or more additional operations not described, and/or without one or more of the operations discussed. Additionally, the order in which the operations of method 50 as illustrated in Figure 3 and described below is not intended to be limiting.
    [0029] In operation 52, a pressurized flow of breathing gas is generated. One or more gas parameters of the pressurized respiratory gas flow is controlled to provide a therapeutic benefit to the individual. In one embodiment, operation 52 is performed by a blower similar to or the same as blower 22 (shown in Figure 1 and described above).
    [0030] In operation 54, pressurized flow of respiratory gas is delivered to the airway of subject 12. In one embodiment, operation 54 is performed by subject circuit 32 shown in Figure 1 and described above.
    [0031] In operation 56, the first pressure sensor 28 senses the first pressure of the gas flow in or near the blower 22. The first pressure sensor 28 generates signals from this pressure reading and transmits the signals to the controller 16.
    [0032] In operation 58, the second pressure sensor 30 detects the second pressure of the gas flow within the pressure line 36. As mentioned above, the pressure line 36 is connected to the subject circuit 32 in the patient interface assembly 20 or near it, and thus the pressure detected by the second pressure sensor 30 is the pressure of the gas flow at or near the subject interface assembly 20. The second pressure sensor 30 generates signals from this pressure reading and transmits the signals to the controller 16.
    [0033] In operation 59, the controller 16 evaluates the difference between the first pressure detected by the first pressure sensor 28 and the second pressure detected by the second pressure sensor 30. For example, the controller 16 determines whether the difference between the first pressure and the second pressure breaks a predetermined threshold value as mentioned above. In one embodiment, controller 16 determines whether the second pressure exceeds the first pressure by the predetermined threshold value.
    [0034] In operation 60, controller 16 controls the valve assembly 42 based on evaluating the difference between the first pressure detected by the first pressure sensor 28 and the second pressure detected by the proximal pressure sensor 30. As mentioned above, the valve system 42 is configured to be operable in 1) a first mode of operation to isolate blower 16 from pressure line 36 and 2) a second mode of operation to allow fluid communication between blower 16 to pressure line 36 to clear pressure line 36 of obstructions with pressurized gas flow. If controller 16 determines that the difference between the first pressure (ie, the pressure in fan 14) exceeds the second pressure (ie, the proximal pressure) by the threshold, controller 16 switches system operation from valve 42 to the second mode of operation (ie the cleaning operation). Alternatively, if controller 16 determines that the difference between the first pressure (ie, the pressure in ventilator 14) and the second pressure (ie, the proximal pressure) is less than the threshold value, controller 16 sets the valve system 42 in the first mode of operation. Of course, when valve system 42 is in the first mode of operation, the individual's mucosa and/or water is prevented from communicating with blower 22 via pressure line 36. Although the invention has been described in detail for the illustrative purposes Based on what is currently considered to be the most practical and preferred embodiments, it should be understood that such detail is for this purpose only and that the invention is not limited to the disclosed embodiments, but rather is intended to cover the modifications and equivalent provisions that are within the scope of the appended claims. For example, it is to be understood that the present invention contemplates that, to the extent possible, one or more functions from any embodiment may be combined with one or more functions from any other embodiment.
    权利要求:
    Claims (5)
    [0001]
    1. SECONDARY LINE CLEANING SYSTEM (10), comprising: a blower (22) configured to pressurize a flow of gas to deliver to an individual (12), the blower (22) comprising a motor connected to a fan having an outlet (24); a first pressure sensor (28) configured to measure a first pressure of the gas flow at or near the blower (22); a subject circuit (32) operatively connected to the outlet (24), the subject circuit (32) adapted to communicate gas flow to a subject airway at a subject interface; a secondary line in fluid communication with the blower (22) and the subject circuit (32) at or near the subject interface, characterized in that the system further comprises a second pressure sensor (30) configured to measure a second pressure of the gas flow within the secondary line; a valve system (42) configured to be operable in 1) a first mode of operation to isolate the blower (22) from the secondary line and 2) a second mode of operation to allow fluid communication between the blower (22) to the line secondary to clear the secondary line of obstructions with pressurized gas flow; a controller (16) configured to switch the operation of the valve system (42) between the first mode of operation and the second mode of operation, based on the first pressure and the second pressure, so that the valve system (42 ) is placed in the second operating mode receptive to a difference between the first pressure and the second pressure that breaks a threshold.
    [0002]
    2. SYSTEM according to claim 1, characterized in that the valve system (42) is placed in the second operating mode receptive to the second pressure that exceeds the first pressure by the limit.
    [0003]
    3. SYSTEM according to claim 1, characterized in that the limit has 5 cm of H20.
    [0004]
    A SYSTEM according to claim 1, characterized in that the valve system (42) comprises a solenoid.
    [0005]
    5. SYSTEM according to claim 1, characterized in that the valve system (42) is placed in the second mode of operation during inhalation of the patient.
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    法律状态:
    2016-09-13| B25D| Requested change of name of applicant approved|Owner name: KONINKLIJKE PHILIPS N. V. (NL) |
    2016-09-20| B25G| Requested change of headquarter approved|Owner name: KONINKLIJKE PHILIPS N. V. (NL) |
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-06-09| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2020-10-27| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2021-03-09| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-18| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 19/10/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US40677010P| true| 2010-10-26|2010-10-26|
    US61/406,770|2010-10-26|
    PCT/IB2011/054658|WO2012056373A1|2010-10-26|2011-10-19|Pressure line purging system for a mechanical ventilator|
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