Patent Description:
Non-invasive positive pressure ventilation has been widely used in treatment of obstructive sleep apnea (OSA), chronic obstructive pulmonary disease (COPD) and other diseases. In the non-invasive positive pressure ventilation, a blower is used to provide a continuous positive airway pressure (CPAP) or a variable pressure ventilation to a patient's airway through a tube and a patient interface apparatus, instead of surgically inserting a tube in the patient's airway.

The patient interface apparatus of the non-invasive ventilation treatment is usually provided with a nasal oxygen catheter and types of breathing masks such as a nasal mask, an oral-nasal mask and a full-face mask and so forth. Either the nasal oxygen catheter or the breathing mask, a gas cavity which is connected with the mouth/nose of the patient is provided to supply gas to the patient. During the treatment process, due to water vapor is contained in both inhaled and exhaled gas by the patient, it is very easy to condense water in the gas cavity, and excessive condensed water may pose a potential threat to the patient.

Due to the patient interface apparatus on the current market is not provided with a function of automatically removing condensed water, it requires active intervention of medical staffs, which makes the apparatus inconvenient to use and increase labor intensity of the medical staffs at the same time. Therefore, it is necessary to provide a patient interface apparatus which is capable to automatically remove condensed water, thereby improving safety of ventilation treatment and reducing labor intensity of the medical staffs.

<CIT> discloses a throwaway sanitary collector of condensate carried in exhalant of a patient using an intermittent positive pressure breathing apparatus. The collector comprises a relatively thin plaque of fine gossamer, the outer rim portion of which is folded upwardly and sandwiched between a mass of highly absorbent material with a portion of its convolutions formed inwardly of the upturned edges of plaque and additional convolutions encircling the exterior of the gossamer.

<CIT> discloses a patient interface device including a moisture outlet structure, which comprises an opening and an exchange layer. The opening is provided on the main body for communicating the gas chamber with the external environment. The exchanger layer covers the opening and is arranged to absorb moisture in the gas chamber and discharge it to the external environment.

<CIT> discloses a nasal cannula assembly comprising a face piece, wherein a liquid absorbent material can be disposed in an internal volume defined by the face piece that is operable to absorb the rainout droplets and wick it away along the entire circumference of the second end portion to a raindrop sink, such as a paper plug. However, this solution can only absorb a limited amount of moisture for a limited number of hours, before the rainout sink has to be dried or replaced.

<CIT> discloses a conduit for use in a pressure support system for communicating a flow of pressurized gas to the airway of a patient includes a first strip of a first material disposed helically about a central longitudinal axis such that subsequent helical convolutions of the first strip are disposed adjacent each other, and a second strip of a second material disposed helically about the central longitudinal axis along the first strip. The second strip is coupled between the subsequent helical convolutions of the first strip so as to form a hollow conduit. The first material is structured to prevent the passage of fluids therethrough. The second material is structured to allow passage of a liquid therethrough while inhibiting passage of gases therethrough.

The invention is defined in the appended independent claim <NUM>. Preferred embodiments are matter of the dependent claims.

The object of the present application is to provide a patient interface apparatus and a ventilation treatment device including the patient interface apparatus, to solve the problems as mentioned above, in particular, by removing the moisture in an easier and user-friendly way.

In order to implement the object mentioned above, one aspect of the present application provides a patient interface apparatus for a ventilation treatment device, wherein the patient interface apparatus comprises a main body and a first moisture-extraction part, wherein a gas cavity is defined inside the main body and configured to communicate with the patient's mouth and/or nose, the first moisture-extraction part is disposed on the main body and comprises a first part communicate with the gas cavity and a second part located outside the main body, the first moisture-extraction part is disposed to be capable to absorb moisture inside of the gas cavity and conduct the moisture to the second part through the first part. The first part is directly disposed inside the gas cavity and the second part is configured to evaporate the moisture to the external environment in use.

Optionally, the patient interface apparatus comprises a headband, the headband is configured to fix the main body to the patient's head, the first moisture-extraction part is formed as either a part of the headband or the entire headband.

Optionally, the moisture-extraction part comprises a fixed stacked water-absorbing layer and a waterproof layer, the waterproof layer is disposed close to a side of the headband for touching the patient's head.

Optionally, the water-absorbing layer is made of fabric or absorbent dressing.

Optionally, the waterproof layer is made of plastic or rubber.

Optionally, the patient interface apparatus is a nasal oxygen catheter, the main body comprises a nasal connector and an adapting connector installed on the nasal connector, the first moisture-extraction part is installed on the nasal connector, the gas cavity is jointly limited formed by the first part, the nasal connector and the adapting connector, the adapting connector is capable to pass gas from a gas source to the gas cavity.

Optionally, the nasal connector comprises an installation structure configured to install the adapting connector, the installation structure comprises a containing cavity with a bottom opening and a top wall and a rear wall which are configured to form the containing cavity, the first part is installed on an inner surface of the rear wall, the adapting connector comprises a shell with a top opening and a rear opening, the shell is sealed and installed in the containing cavity via the bottom opening of the installation structure, the gas cavity is formed by the shell, the top wall and the first part.

Optionally, the nasal connector comprises a nasal plug configured to insert a nasal cavity, the nasal plug is disposed to extend upward along the top wall and communicate with the gas cavity.

Optionally, the nasal connector comprises two connecting walls extending outward from two ends of a left end and a right end of the rear wall, respectively, each of the connecting walls is disposed with a via hole along its extending direction, the second part of the first moisture-extraction part is disposed to extend from one end of the first part, extend and penetrate the two connecting walls and then connect with the other end of the first part.

Another aspect of the present application provides a ventilation treatment device, the ventilation treatment device comprises a host as a gas source, a ventilation tube and the patient interface apparatus as mentioned above, and the host is connected with the patient interface apparatus through the ventilation tube.

Optionally, the ventilation treatment device comprises a second moisture-extraction part, wherein the second moisture-extraction part is installed on the ventilation tube and comprises a tube inner part located in the ventilation tube and a tube outer part located outside the ventilation tube, the second moisture-extraction part is disposed to be capable to absorb moisture in the ventilation tube and conduct the moisture to the tube outer part through the tube inner part.

Optionally, a tube wall of the ventilation tube is disposed with an opening, the tube inner part is connected with the inner wall of the ventilation tube, and the tube outer part extends out of the ventilation tube through the opening in a sealed way.

Optionally, the second moisture-extraction part is a long strip shape extending along an axial direction of the ventilation tube, the tube outer part is connected with the outer wall of the ventilation tube.

Optionally, the ventilation treatment device comprises a plurality of second moisture-extraction part, the plurality of second moisture-extraction part are disposed along a circumference of the ventilation tube.

Optionally, the ventilation tube comprises a first tube and a second tube connected with one end of the first tube, one end of the first tube away from one end of the second tube is connected with the patient interface apparatus, one end of the second tube away from one end of the first tube is connected with the host, the tube inner part is connected with the inner wall of the first tube, and the tube outer part is connected with the outer wall of the second tube.

Optionally, the second tube is a heating tube.

Optionally, the second tube is inserted and connected to the first tube, the tube outer part extends to outside of the second tube through an insertion gap between the first tube and the second tube.

Optionally, the second moisture-extraction part has a tubular shape, the outer circumference of the tube inner part is connected to the inner wall of the first tube, the outer wall of the second tube is sleeved in the tube outer part.

Optionally, the second moisture-extraction part is made of fabric or absorbent dressing.

The patient interface apparatus in the present application through disposing the first moisture-extraction part on the main body, it is capable to conduct the moisture in the gas cavity to outside of the main body, which may automatically remove condensed water in the gas cavity, thereby improving safety of ventilation treatment and reducing labor intensity of medical staffs.

Other features and advantages of the present application will be described in detail in the subsequent embodiments as following.

The attached figures are configured to provide further understanding of the present application, and being a part of the description and configured to explain the present application with the embodiments below, but do not limit the present application. In the figures:.

<NUM>-main body, <NUM>-gas cavity, <NUM>-nasal connector, <NUM>-top wall, <NUM>-rear wall, <NUM>-nasal plug, <NUM>-connecting wall, <NUM>-first flange, <NUM>-second flange, <NUM>-first fixing belt, <NUM>-second fixing belt, <NUM>-adapting connector, <NUM>-shell, <NUM>-top opening, <NUM>-rear opening, <NUM>-interface, <NUM>-first groove, <NUM>-second groove, <NUM>-frist moisture-extraction part, <NUM>-water-absorbing layer, <NUM>-waterproof layer, <NUM>-first part, <NUM>-second part, <NUM>-ventilation tube, <NUM>-first tube, <NUM>-second tube, <NUM>-second moisture-extraction part, <NUM>-tube inner part,
<NUM>-tube outer part.

The following is a detailed description of the embodiments of the present application in combination with the attached figures. It should be understood that the embodiments described herein are intended only to illustrate and explain the present application and are not intended to limit the present application.

In the present application, in the absence of any indication to the contrary, locational terms such as "up, down, top, bottom, left, right, rear" are generally used to refer to the orientation of the patient whom is in a standing state. "Inside and outside" refers to the inside and outside of the parts relative to their own contours.

In one aspect, the present application provides a patient interface apparatus for a ventilation treatment device, wherein the patient interface apparatus includes a main body <NUM> and a first moisture-extraction part <NUM>, wherein a gas cavity <NUM> is defined inside the main body <NUM> and configured to communicate with the patient's mouth and/or nose, the first moisture-extraction part <NUM> is installed on the main body <NUM>, and it includes a first part <NUM> connected with the gas cavity <NUM> and a second part <NUM> located outside the main body <NUM>, the first moisture-extraction part <NUM> is disposed to be capable to absorb moisture inside of the gas cavity <NUM> and conduct the moisture to the second part <NUM> through the first part <NUM>.

The first part <NUM> is directly disposed inside the gas cavity <NUM>. In addition, the first moisture-extraction part <NUM> is an integral part. Moisture in the gas cavity <NUM> may include water vapor in gas supplied to a patient for inhalation, water vapor in gas exhaled by the patient and condensed water generated in the gas cavity <NUM>.

When using the product, after the first part <NUM> of the first moisture-extraction part <NUM> absorbs the moisture in the gas cavity <NUM>, it will diffuse and conduct the moisture to the second part <NUM>, due to the second part <NUM> is located at external environment of the main body <NUM>, and the external environment humidity is low, relatively dry, so the moisture in the second part <NUM> is constantly evaporate to the external environment.

The patient interface apparatus of the present application is capable to export the moisture in the gas cavity <NUM> to the outside of the main body <NUM> by disposing the first moisture-extraction part <NUM> on the main body <NUM>, and automatically remove the condensed water in the gas cavity <NUM>, thus improving safety of the ventilation treatment and reducing labor intensity of medical staffs.

In the present application, the first moisture-extraction part <NUM> may be an additionally disposed component, or may be disposed as attaching other components of the patient interface apparatus. Due to the patient interface apparatus usually includes a headband configured to fix the main body <NUM> to the patient's head, therefore, according to an embodiment of the present application, the first moisture-extraction part <NUM> may be formed as either a part of the headband or an entire headband (see <FIG>).

The headband will contact with the patient's head when the patient interface apparatus is placed on the patient's head. In order to improve the comfort of wearing the apparatus for the patient, the first moisture-extraction part <NUM> may include a fixed stacked water-absorbing layer <NUM> and a waterproof layer <NUM>, and the waterproof layer <NUM> is disposed close to a side of the headband for touching the patient's head. It should be understood that, the first moisture-extraction part <NUM> with the waterproof layer <NUM> mentioned above is more suitable for the situation where the first water-extraction part <NUM> touches the patient's head. In other embodiments, the first water-extraction part <NUM> may just include the water-absorbing layer <NUM>.

In the present application, the waterproof layer <NUM> of the first moisture-extraction part <NUM> may be made of impermeable materials such as plastic or rubber and so forth. In order to improve the comfort of wearing, the waterproof layer <NUM> is preferably made of softer materials such as silica-gel and so forth. The water-absorbing layer <NUM> of the first moisture-extraction part <NUM> may be made of fabric or absorbent dressing, the water-absorbing layer <NUM> may be single or multi-layer structure. In addition, when the first part <NUM> is used to limit the gas cavity <NUM>, the water-absorbing layer located in the first part <NUM> may be preferably provided with a characteristic of good water absorption but high permeability resistance, which may reduce the loss of gas for the patient to inhale, and improve the sealing performance of the gas cavity <NUM>. That is, the first part <NUM> and the second part <NUM> of the first water-extraction part <NUM> may be made of different materials.

In the present application, the patient interface apparatus may be a nasal oxygen catheter or a nasal mask, an oral-nasal mask, a full-face mask and so forth. The present application is further introduced by taking the nasal oxygen catheter as an example.

As referring to <FIG>, a nasal oxygen catheter is shown, a main body <NUM> includes a nasal connector <NUM> and an adapting connector <NUM> installed on the nasal connector <NUM>, a first moisture-extraction part <NUM> is installed on the nasal connector <NUM>, a gas cavity <NUM> is jointly limited formed by the first part <NUM>, the nasal connector <NUM> and the adapting connector <NUM>, and the adapting connector <NUM> is capable to pass gas from a gas source into the gas cavity <NUM>.

In the mentions above, it should be understood that, the nasal connector <NUM> is the part configured to connect with the nasal cavity of the patient; the gas source is an apparatus that produces pressurized air or breathable gas, such as a host of a ventilation treatment device. In addition, the nasal connector <NUM> may be made of flexible materials (such as silica-gel), the adapting connector <NUM> may be made of materials harder than the nasal connector <NUM> (such as plastic) in order to support the nasal connector <NUM>, so that it may ensure that the nasal connector is not easy to deform while comfortable wearing it, thereby ensuring ventilation of the nasal oxygen catheter, and improving reliability of the ventilation of the nasal oxygen catheter.

Further, as referring to <FIG> and <FIG>, the nasal connector <NUM> may include an installation structure configured to install the adapting connector <NUM>. The installation structure includes a containing cavity with a bottom opening and a top wall <NUM> and a rear wall <NUM> which are configured to limit the containing cavity. The first part <NUM> is installed on the inner surface of the rear wall <NUM>. The adapting connector <NUM> includes a shell <NUM> with a top opening <NUM> and a rear opening <NUM>. The shell <NUM> is sealed and installed in the containing cavity via the bottom opening of the installation structure, and the gas cavity <NUM> is formed by the shell <NUM>, the top wall <NUM> and the first part <NUM>. In the mentions above, the top wall <NUM> seals the top opening <NUM> of the shell <NUM>, the first part <NUM> seals the rear opening <NUM> of the shell <NUM>.

In the mentions above, the shell <NUM> is sealed and installed in the containing cavity, which means that there is no space between the outer wall of the shell <NUM> and the top wall <NUM> and the rear wall <NUM> (as referring to <FIG>). Further, the shell <NUM> and the top wall <NUM> and the rear wall <NUM> may be clamped through matching structures of flanges and grooves, thereby improving reliability and air tightness of the assembly. Particularly, as referring to <FIG> and <FIG>, the top wall <NUM> is disposed with a first flange <NUM> which extends downward along the edge of the top wall <NUM>, the outer wall of the shell <NUM> is disposed with a first groove <NUM> which is matched with the first flange <NUM>; the rear wall <NUM> is disposed with a second flange <NUM> extending forward from the inner surface of the rear wall <NUM> , the outer wall of the shell <NUM> is disposed with a second groove <NUM> which is matched with the second flange <NUM>. In addition, as referring to <FIG>, an installation groove is formed between the second flange <NUM> and the top wall <NUM> which is for the first part <NUM> embedding in.

In the present application, on the condition that the first moisture-extraction part <NUM> is formed as a headband, in order to strengthen the connection between the first moisture-extraction <NUM> and the nasal connector <NUM>, as referring to <FIG>, the nasal connector <NUM> may include two connecting walls <NUM> extending outward from two ends of a left end and a right end of the rear wall <NUM>, respectively. Each of the connecting walls <NUM> is disposed with a via hole along its extending direction. The second part <NUM> of the first moisture-extraction part <NUM> is disposed to extend and pass through the two connecting walls <NUM> from one end of the first part <NUM> and then connect with the other end of the first part <NUM>. It should be explained that, during manufacturing, the first moisture-extraction <NUM> may be molded together with the nasal connector <NUM>.

In addition, as referring to <FIG> and <FIG>, the nasal connector <NUM> may also include a nasal plug <NUM> configured to insert a nasal cavity, the nasal plug <NUM> is disposed to extend upward along the top wall <NUM> and connect with the gas cavity <NUM>. It should be understood that, quantity of the nasal plug <NUM> is two.

In the present application, as referring to <FIG>, the adapting connector <NUM> may also include an interface <NUM> configured to connect with a ventilation tube <NUM> of the gas source, the interface <NUM> is disposed on the shell <NUM> and communicate with the gas cavity <NUM>. When using the product, the gas from the gas source passes the ventilation tube <NUM> and the interface <NUM> to enter the gas cavity <NUM>, then enters the nasal cavity of the user through the nasal plug <NUM>, through the top opening <NUM> of the shell <NUM>.

In addition, in order to improve reliability of the assembly of the adapting connector <NUM> and the nasal connector <NUM>, and to further improve air tightness of the nasal oxygen catheter, the nasal connector <NUM> may include a fixing part which configured to fix the adapting connector <NUM> to the installation structure.

Wherein, the fixing part may be a fixing belt of which two ends are connected with the top wall <NUM> and the rear wall <NUM>, respectively, to form a penetrating space which allows the adapting connector <NUM> to penetrate. Particularly, as referring to <FIG>, the fixing belt may include a first fixing band <NUM> and a second fixing band <NUM> which are interval disposed along the penetrating direction (the direction from left to right as shown in <FIG>) of the adapting connecter <NUM>. The circumferential profile of the shell <NUM> may be disposed as decreasing gradually along its penetrating direction. Correspondingly, the penetrating space formed by the first fixing band <NUM> is larger than that formed by the second fixing band <NUM>. That is, when the adapting connector <NUM> is installed on the nasal connector <NUM>, the right end of the shell <NUM> may be easily penetrate the first fixing band <NUM>, and then penetrate inside of the second fixing band <NUM>. The assembly is very simple. In addition, in order to prevent gas leakage from the end being tipped up of the adapting connector <NUM> which matches the second fixing belt <NUM>, the end of the second fixing band <NUM> which is away from the first fixing band <NUM> may be disposed as a closed form (as referring to <FIG>). At this point, the adapting connector <NUM> may only be inserted from the left side of the first fixing band <NUM>, but may not be inserted from the right side of the second fixing band <NUM>.

Another aspect of the present application provides a ventilation treatment device, the ventilation treatment device includes the patient interface apparatus as mentioned above.

In the present application, the ventilation treatment device may be a ventilator, a high-flow treatment device and so forth.

The ventilation treatment device may also include a host as the gas source and a ventilation tube <NUM>, the host may connect with the patient interface apparatus through the ventilation tube <NUM>. Particularly, when the patient interface apparatus is a nasal oxygen catheter, one end of the ventilation tube <NUM> may be connected with a gas outlet of the host, the other end of the ventilation tube <NUM> may be connected with an interface <NUM> of the adapting connector <NUM> of the nasal oxygen catheter.

In the present application, the ventilation treatment device may also include a second moisture-extraction part <NUM>, the second moisture-extraction part <NUM> is installed on the ventilation tube <NUM> and includes a tube inner part <NUM> located in the ventilation tube <NUM> and a tube outer part <NUM> located outside the ventilation tube <NUM>, the second moisture-extraction part <NUM> is disposed to be capable to absorb moisture in the ventilation tube <NUM> and conduct the moisture to the tube outer part <NUM> through the tube inner part <NUM>.

When using the product, after the tube inner part <NUM> of the second moisture-extraction part <NUM> absorbing the moisture in the ventilation tube <NUM>, it will diffuse and conduct the moisture to the tube outer part <NUM>, due to the tube outer part <NUM> located at external environment of the ventilation tube <NUM>, and the external environment humidity is low, relatively dry, the moisture in the tube outer part <NUM> is constantly evaporate to the external environment.

In the present application, by installing the second moisture-extraction part <NUM> on the ventilation tube <NUM>, condensate water formed in the gas cavity <NUM> of the patient interface apparatus may flow to the ventilation tube <NUM>, and then be exported by the second moisture-extraction part <NUM>.

Wherein, it should be noted that, the second moisture-extraction part <NUM> is a similar part to the first moisture-extraction part <NUM>, but since the second moisture-extraction part <NUM> does not touch the head of the patient, the second moisture-extraction part <NUM> may only include water-absorbing layer, which may be a single or multi-layer structure made of fabric or absorbent dressing.

In some embodiments, in order to reduce the patient's discomfort caused by gas way dryness and so forth when using the product, the ventilation treatment device may also include a humidifying device configured for heating and humidifying gas, the gas after humidifying may be conveyed to the patient interface apparatus through the ventilation tube <NUM>. Under this condition, the disposing of the second moisture-extraction part <NUM> may also prevent excessive condensed water formed by humidified gas in the ventilation tube <NUM> and get into the patient's respiratory tract and cause potentially risks.

According to an embodiment of the ventilation tube <NUM> in the present application, as referring to <FIG>, the ventilation tube <NUM> may include a first tube <NUM>, the second moisture-extraction part <NUM> may be installed on the first tube <NUM>, the tube inner part <NUM> of the second moisture-extraction part <NUM> is located inside of the first tube <NUM>, and the tube outer part <NUM> of the second moisture-extraction part <NUM> is located outside of the first tube <NUM>.

Wherein, for installation of the second moisture-extraction part <NUM>, as referring to <FIG>, an opening may be disposed on tube wall of the first tube <NUM>, the tube inner part <NUM> is connected with inner wall of the first tube <NUM>, the tube outer part <NUM> is sealed by the opening and extends outside the first tube <NUM>. Wherein, the tube inner part <NUM> of the second moisture-extraction part <NUM> may be fixed to the inner wall of the first tube <NUM> by means of bonding or hot-melt welding, the tube outer part <NUM> may be connected with the outer wall of the first tube <NUM>, or it may not be connected with the outer wall of the first tube <NUM>. In order to improve sealing performance of the first tube <NUM>, during manufacturing, the second moisture-extraction <NUM> is preferably to be molded together with the first tube <NUM> to from as an entirety.

In the present application, the second moisture-extraction part <NUM> may be provided with any shape. Particularly, the implementation way as referring to <FIG> and <FIG>, the second moisture-extraction part <NUM> may be a long strip shape extending along the axial direction of the first tube <NUM>, the tube outer part <NUM> is connected with the outer wall of the first tube <NUM>.

Further, in order to improve extraction effect of moisture in the first tube <NUM>, the ventilation tube <NUM> may include a plurality of second moisture-extraction part <NUM>, the plurality of second moisture-extraction part <NUM> may be disposed along the circumference of the first tube <NUM>.

The description above introduces the situation of that the ventilation tube <NUM> includes one tube (that is the first tube <NUM>), in other embodiments of the present application, the ventilation tube <NUM> may be formed by connecting a plurality of tubes, under this situation, each of the tubes may be installed with the second moisture-extraction part <NUM>, respectively, or the second moisture-extraction part <NUM> may be installed between two adjacent tubes.

Particularly, the embodiment as referring to <FIG>, the ventilation tube <NUM> may also include a second tube <NUM>, the second tube <NUM> is connected with one end of the first tube <NUM>, the tube inner part <NUM> of the second moisture-extraction part <NUM> is connected with the inner wall of the first tube <NUM>, and the tube outer part <NUM> is connected with the outer wall of the second tube <NUM>.

Further, as referring to <FIG>, the second tube <NUM> may be inserted to the first tube <NUM>, the tube outer part <NUM> of the second moisture-extraction part <NUM>, through an insertion space between the first tube <NUM> and the second tube <NUM>, extends to outside of the second tube <NUM>. Under this situation, the second moisture-extraction part <NUM> may have a tubular shape, so that the outer circumference surface of the tube inner part <NUM> is connected to the inner wall of the first tube <NUM>, and the outer wall of the second tube <NUM> is directly sleeved in the tube outer part <NUM>.

In the mentions above, the second tube <NUM> may be a heating tube. Under this situation, due to the tube outer part <NUM> of the second moisture-extraction part <NUM> touches the outer wall of the second tube <NUM>, so that evaporation of moisture in the tube outer part <NUM> may be accelerated, thereby improving moisture extraction effect. When using the product, one end of the first tube <NUM> away from the second tube <NUM> may be connected with the patient interface apparatus, and one end of the second tube <NUM> away from the first tube <NUM> may be connected with the host.

The mentions above combining the attached figures to describe the optimized embodiments specifically, however, the present application is not limited to the specific details of the implementation ways above.

It should also be noted that the specific technical characteristics described in the above specific embodiments may be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application does not specify the possible combination ways separately.

Claim 1:
A patient interface apparatus for a ventilation treatment device, wherein the patient interface apparatus comprises a main body (<NUM>) and a first moisture-extraction part (<NUM>), wherein a gas cavity (<NUM>) is defined inside the main body (<NUM>) and configured to communicate with the patient's mouth and/or nose, the first moisture-extraction part (<NUM>) is disposed on the main body (<NUM>) and comprises a first part (<NUM>) communicating with the gas cavity (<NUM>) and a second part (<NUM>) located outside the main body (<NUM>), the first moisture-extraction part (<NUM>) is configured to be capable of absorbing moisture inside of the gas cavity (<NUM>) and conveying the moisture to the second part (<NUM>) through the first part (<NUM>) directly disposed inside the gas cavity (<NUM>),
characterized in that the second part (<NUM>) is configured to evaporate the moisture to the external environment in use.