JP5540064B2 - Method and apparatus for humidifying and warming air - Google Patents

Description

(Related application)
The present applicant claims priority based on US Provisional Application No. 60 / 215,442 filed on June 30, 2000 in accordance with Rule 35, Rule 119 (e) of US Law 35, Is referenced and quoted here.

(Technical field to which the invention belongs)
The present invention relates to a method and apparatus for humidifying and / or warming a gas prior to using the gas in a surgical procedure or other medical procedure.

In many medical and surgical procedures, it is necessary to supply warm and / or humidified gas to the patient at a constant high flow rate. Ideally, the flow rate should be about 20 liters / minute, the relative humidity should be about 80-100%, and the temperature should be about 90-105 ° F. Most prior art devices do not meet or exceed such ideal properties. The flow rate of many conventional devices is well below 20 liters / minute. Generally, conventional devices have a flow rate of about 12-14 liters / minute. Most of these devices generally require high pressure because they operate by pushing gas through the humidified material. Due to such an increase in pressure, the gas flow rate is further reduced.

  A first aspect of the present invention relates to a gas humidifier, which is a humidifier that is in fluid communication with an inlet, and that readily absorbs moisture and is exposed to a dry environment. It has a humidifying material that easily releases moisture, and this humidifying material has a configuration in which a turbulent flow is generated in the gas when the gas passes through the surface of the humidifying material, and the humidifying device. And an outlet in fluid communication.

  A second aspect of the present invention relates to a gas humidifier, which is a humidifier that is in fluid communication with an inlet and is readily absorbing moisture and exposed to a dry environment. It has a humidifying material that easily releases moisture, and this humidifying material is arranged inside the outer shell, and is configured to generate turbulence in the gas when the gas passes through the surface of the outer shell. A humidifier and an outlet in fluid communication with the humidifier.

  A third aspect of the present invention relates to a gas humidifier. The humidifier is a humidifier that is in fluid communication with an inlet, and includes a heater housing that includes a heater and a plurality of openings. It has a humidifier. And a humidifying material that readily absorbs moisture and releases moisture when exposed to a dry environment, and an outlet in fluid communication with the humidifying device.

  A fourth aspect of the present invention relates to a gas humidifier, and the humidifier includes an inlet means for supplying gas, a turbulent means for generating turbulent flow in the gas, and a gas humidifier. Outlet means for releasing turbulent gas from the

  A fifth aspect of the present invention relates to a method for humidifying a gas, the method being applied to a surface of a humidified material that readily absorbs moisture and releases moisture when exposed to a dry environment. Supplying a gas; and passing the gas through the surface of the humidifying material to generate turbulent flow in the gas.

  A sixth aspect of the present invention relates to a method for humidifying a gas, the method comprising: heating a gas; humidifying the gas; and in fluid communication with the gas during humidification. Arranging.

A seventh aspect of the present invention relates to a gas device, which measures the temperature of an inlet, a heater in fluid communication with the inlet, and the gas flowing inside the gas device in an indirect manner. A temperature sensor.

  An eighth aspect of the invention relates to a method for humidifying a gas, the method comprising warming the gas, humidifying the gas, flowing the gas over the surface of the humidifier, It has.

Each of the above aspects provides the advantage that a warmed and / or humidified gas can be delivered to the patient at or near the preferred flow rate, humidity and / or temperature.
The foregoing and other features and advantages of the present invention will become apparent upon reading the following detailed description of the preferred embodiments in conjunction with the accompanying drawings.

  FIG. 1 is a diagram illustrating a gas heating and humidifying apparatus according to one embodiment. FIG. 1 shows a device as used with an inhalation device. The device 1 shown in FIGS. 1 to 3 is used in connection with the suction pipe 10. In a preferred embodiment, the device is located downstream of the gas source for the inhalation device, where downstream refers to the outlet of the inhalation tube 10 and a position close to the patient. The device 1 has an upstream end disposed closer to the gas source and a downstream end disposed closer to the patient. The gas warming and humidification device 1 may be configured as a reusable or disposable product.

  As shown in FIG. 1, in one embodiment, a gas inlet port 12 is disposed at the upstream end of the instrument 1 and is associated with the suction pipe 10. A plurality of plugs 14 may be arranged at the upstream end of the device 1. Plug 14 may be a male terminal associated with heater 18 and / or thermocouple and / or other suitable detection device. It should be understood that the plug 14 may change position at the upstream end, or consider other positions.

  As shown in FIGS. 1 to 3, the general arrangement of the device 1 according to one embodiment is as follows. That is, the device 1 includes a heater 18. A core 20 is disposed so as to surround the heater 18. The core 20 maintains the heater 18 in a substantially waterproof environment. A humidifying material 24 is disposed around the core 20. The humidifying material 24 surrounds substantially the entire core 20. The humidifying material 24 may surround only a portion of the core 20. An outer shell 26 that functions as a housing surrounds the humidifying material 24. A gas outlet 28 associated with the downstream part of the suction pipe 10 may be arranged at the downstream end of the device 1.

  The heater 18 in the above embodiment is a conventional cartridge heater, a heating wire, a light bulb, or other heating device that can generate a temperature rise that is radiated from the surface of the heater. May be included. As shown in FIG. 1, the heater 18 can be inserted into the core 20 made of an insulating material. In another embodiment, as shown in FIG. 2, the heater 18 and the plug 14 are molded into a single assembly, and further, the core 20 is molded into a single unit.

  The heater 18 is a metal structure and may comprise an integral sensing element or may comprise an external sensing element. The heater may also be molded from a high heat resistance plastic. In order to make the heater 18 disposable, a low-cost plastic heater 18 is more suitable, but the heater 18 is disposable, whether it is made of metal or plastic. Further, making the device 1 disposable or reusable helps to maintain the device 1 in a sterile state in any application where the sterilized device 1 may be required.

  In the preferred embodiment, the heater 18 has a power output of about 36 watts, although other power heaters 18 such as 10-50 watts may be used. The length of the heater 18 is typically about 1-5 inches, preferably 1.5-3 inches, although the physical size of other components and the amount of humidity generated. Different sizes may be used depending on. As shown in FIGS. 1 to 4 and 18, the heater 18 can be connected to a control circuit 100, which controls the amount and rate of heat generated by the heater 18. As shown in FIG. 18, the control circuit 100 includes one or more temperature sensors 102 and a control device 104, which are supplied to the heater to adjust the amount of energy applied to the heater 18. The generated current is turned on / off and modulated to increase or decrease the current. When two temperature sensors 102 are used, each of the temperature sensors 102 independently measures the temperature of the core 20. The temperature signal from the temperature sensor 102 is continuously sent to the amplifier 105. When the two signals are compared with each other and it is determined that the difference between the signals has reached or exceeded a predetermined level such as 5 ° C., the controller 104 turns off the current driver 106 and is supplied to the heater 18. Cut off current. The reason for turning off the current driver 106 is that the predetermined level has been reached or exceeded because one or both sensors 102 are defective and need to be replaced.

  Assuming that the sensor 102 is not defective, the controller 104 includes four identical current drivers 106, which are connected in parallel with each other as shown in FIG. Each driver 106 provides the same output as the outputs of the other three drivers 106. The controller 104 drives each output of the current driver 106 with a waveform with a duty cycle of about 25%. About four hundred percent drive of the heater 18 is obtained by the four drivers combined. Each driver 106 includes a 1000 μF capacitor 108 in parallel with the fuse 110. Capacitors 108 do not conduct current through the corresponding fuse 110 during each 25% duty cycle. When one driver 106 breaks down and current flows continuously, the corresponding capacitor 108 is charged and current flows through the corresponding fuse 110. Within about 2 seconds, the fuse 110 of the driver circuit 106 is blown, thereby preventing uncontrolled current from flowing through the heater 18.

  In one embodiment, the device 1 can have wiring that is permanently attached to the heater 18. In other embodiments shown in FIG. 1, the device 1 can have wiring to the heater 18 configured with an integral connector molded into the device 1 or used once. It can be connected / disconnected via a type of tab connection device. In yet another embodiment, the device 1 can have a wiring to the heater 18 that has a termination that is molded into the raw connection and plugs the cable into the cost. Can be reduced. The electrical wiring used to supply power and measure temperature or humidity can be wired directly to the active device or encapsulated in a mold. In a preferred embodiment, the output wiring is molded or plugged into the outer shell 26 so that the wires can be removed from the device 1.

  The heater 18 may be controlled by a conventional heater control device that is commercially available, for example, manufactured by Watlow. The control device is typically designed to operate using a temperature detection device such as a thermocouple, a resistance temperature detector (RTD), or a thermistor.

  Optionally, in another embodiment, the device 1 may be provided with an additional circuit for measuring humidity using a humidity sensor. Humidity sensors are available from Omega Engineering, Inc., Atlanta, Georgia, and they can supply a circuit for reading and display along with the sensor. As a further option, the temperature of the gas and the humidity of the gas can be displayed with additional circuitry. Additional to display such information by a remote power supply unit that is part of an inhalation device or part of another device used in connection with endoscopic procedures in the operating room A typical circuit may be provided. Based on the readings, adjustments are made to either or both the amount of humidity supplied to the humidifying material 24 and / or the amount of heat to be applied.

  In one embodiment, the control device cooperates with the inhalation device to provide the circuit described above. By monitoring temperature, gas volume used, gas flow rate, and / or humidity reading characteristics, the inhaler device dynamically controls variables to maintain optimal conditions.

  The core 20 can be made from plastic or sheet metal, although not limited thereto. Plastics that can be used for the core 20 include polycarbonate, Ryton (R), Vespel (R), or other high temperature plastics. In addition, a sheet metal such as aluminum coated with an insulating material may be used for the core 20.

  As shown in FIG. 1, the device 1 includes a humidifying material 24. Humidifying material 24 readily absorbs moisture and releases moisture when exposed to a dry environment. Many commercially available fibers that can meet such requirements include materials such as nylon and cotton. The humidifying material 24 can have an inner surface and an outer surface that are tubular. Tubular means that the surface is smooth. However, in other embodiments, the humidifying material 24 may be patterned or may change to a non-smooth surface every 15 °.

  As shown in FIG. 4, the humidifying material 24 used in the preferred embodiment has a smooth inner surface and an outer surface that is serrated or star-shaped, and is the shortest linear space possible. On the other hand, it has the largest surface area. The preferred embodiment illustrated in FIG. 4 includes a first portion and a second portion of humidifying material 24. Each portion of the humidifying material 24 is approximately 1 inch long and its internal channel is in intimate contact with the heater 18. Each of these serrated portions is slidably placed on the core 20 containing the heater 18. There is preferably a 1/4 inch gap between the serrated portions. In one embodiment, a plastic spacer can be inserted between the serrated portions to provide a gap. In a preferred embodiment, the first and second serrated portions are out of phase with each other to turbulent gas and increase the surface area of the material as it passes through each portion. Note that the first and second serrated portions can be formed by cutting a single serrated material to form two serrated portions. After cutting, the two serrated parts can be rotated relative to each other to obtain the desired phase difference between the two parts.

The flow of CO ₂ gas around the hygroscopic material is affected by the shape of the hygroscopic material and / or the shape of the channels inside the outer shell 26. In one embodiment, the hygroscopic humidifying material 24 may be cylindrical in shape and surrounded by a coil to direct the flow of CO ₂ gas. As the CO ₂ gas moves through the coil windings, the CO ₂ gas is heated and humidified. The outer surface of the coil is in contact with the inner surface of the outer shell 26 to form a seal, which guides the CO2 gas along the coil winding.

  The humidifying material 24 may have other shapes and sizes. Manufacturers of such humidifying materials 24 include Pall Medical, Inc., East Hill, New York City, and Filtrona Richmond Inc., Richmond, Virginia.

  The temperature of the humidifying material 24 is increased by the accommodated heater 18, thereby increasing the temperature of the contained moisture. When the temperature of the humidity rises, the vapor is absorbed by the gas passing through the humidifying material 24. The humidifying material 24 preferably has a large surface area in the direction of gas flow, and is configured to increase the chance that moisture evaporates into the gas and humidifies the gas.

  In yet another embodiment, for example, as shown in FIG. 2, the inner surface of the outer shell 26 surrounding the humidifying material 24 and the heater 18 has an irregular pattern or fabric to create turbulence in the gas. have. Such turbulence can be created by various structures. Such a structure can be disposed, for example, as part of the outer shell 26 or in the humidifying material 24. Another example structure for creating turbulence may include a helical barrier. In other embodiments, other structures can be incorporated, for example by attaching to the humidifying material 24 of the device 1 or to the inner surface of the outer shell 26.

The moisture provided to the humidifying material 24 can include drugs and additives that are carried to the patient along with the vaporized and humidified gas. The level of drug and / or fluid in the gas can be controlled by vaporization time and absorption rate. Fluid may be injected using a syringe, self-weighted through a tube, or any number of pumps to maintain an appropriate saturation level.

  The device 1 has a port 16 for injecting a fluid for humidification. Moisture may include sterilized water, drugs, or a mixture of fluids required for simple humidification or drug administration. Port 16 may be a standard infusion port typically used in the medical industry, such as a valve or any other device that can open and close a fluid inlet.

  The device 1 includes one or more temperature detection devices (not shown) for adjusting the heater 18. Each temperature detection device may be a resistance temperature detector (RTD), a thermistor, a thermocouple, or the like. In a preferred embodiment, a K-type thermocouple is embedded in the heater 18 and its temperature is measured. For example, manufacturers of heater control devices such as Watlow and Hot Watt can provide temperature detection and control devices. As shown in FIG. 1, the outer shell 26 is an oval tube having an internal channel, but can be any shape that can accommodate the internal elements of the device. In a preferred embodiment, the inner channel of the outer shell 26 is smooth. In other embodiments, irregularly shaped surfaces of any shape that facilitate turbulence without impeding flow can be provided in the 15 inner channels of the outer shell 26. The outer shell 26 has an outlet opening 28 for gas and an inlet opening 12. The outer shell 26 further has a fluid filling port 16 for injecting fluid. However, other methods may be employed in order to inject fluid or drug into the outer shell 26 appropriately.

The overall length of the preferred embodiment is 3.5 to 4 inches. Desirably, the weight of device 1 is about 4 ounces. The outer shell 26 can be made of any suitable material such as metal or plastic.
In other embodiments, the device 1 may include a humidity sensor 34 as shown in FIG. A suitable humidity sensor 34 is available from Omega Corporation, Atlanta, Georgia.

  Optionally, in another embodiment, in addition to the temperature detection device described above, an external temperature detection device 32 may be inserted just outside the gas outlet 28 in the suction pipe 10. The same type as the temperature detection device inside the device 1 described above can be used. This device 32 measures the temperature downstream of the gas.

  The temperature of the gas is related to the temperature of the heater 18. The temperature detection device disposed inside the heater 18 measures the temperature of the heater 18. The temperature of the gas is not measured directly. Rather, the resulting gas temperature is correlated to the heater temperature.

  The heated and humidified gas is discharged from the device 1 through the gas outlet 28. The gas outlet may be a series of holes. The gas then enters the inhalation tube 10 and is delivered to the patient.

  5 to 12 show a gas humidifier according to another embodiment. Similar to the apparatus of FIGS. 1-4, the gas humidifier 201 may be used in conjunction with an inhaler. More specifically, the gas humidifier 201 is arranged downstream of the gas source for the inhaler. The gas humidifier 201 may be configured as a reusable or disposable product.

  As shown in FIGS. 5, 6, 9, and 10, a gas inlet port 212 is attached so as to pass through a side portion of the front cap 213 of the gas humidifier 201. Further, an inlet port 215 is attached so as to pass through the central portion of the front cap 213. The inlet port 215 allows electrical components and wiring to be inserted into the gas humidifier 201. The gas humidifier 201 may be modified to exchange the ports 212 and 215 with each other.

  As shown in FIG. 5, the cap 213 has an annular metal heater housing 217 attached to the cap. The heater housing 217 is in fluid communication with the gas inlet port 212. The heater housing 217 houses a heater cartridge that is well known to those skilled in the art. When the heater cartridge is energized, the inside and the main body of the heater housing 217 are heated, and the gas inside and outside the heater housing 217 is heated. The heater housing 217 includes a plurality of round holes 219 having a diameter of about 0.1 inch (0.254 cm). The hole 219 may have other shapes and sizes such as a triangular or rectangular opening. When gas flows into the gas humidifier 201 via the gas inlet port 212, the gas flows into the heater housing 217, where it is heated as needed and then flows out through the holes 219. As shown in FIG. 5, about 16 holes 219 are arranged at equal intervals along the annular ring. The hole 219 of the heater housing 217 improves the heating rate of the gas inside the gas humidifier 201 and generates turbulence in the gas flowing inside the gas humidifier 201.

  The two holes 219 are preferably provided with RTD sensors. These sensors operate in the same manner as the temperature sensors of the embodiments of FIGS. More specifically, the temperature measured by the two sensors is compared with each other to determine whether one or both sensors are defective.

  As shown in FIG. 5, the rear cylindrical portion 223 of the heater housing 217 is slip-fit into the cylindrical central opening of the humidifying material 224, which is preferably the humidifying material 24 previously described in FIGS. Made from the same material. The washer 221 is fitted to the rear portion 223 and comes into contact with the rear surface of the humidifying material 224, and functions as a stopper for preventing the humidifying material 224 from falling off the rear portion 223 and fitting into the outlet 228.

  In other embodiments, the gas humidifier 201 can further include a plate 225 disposed between the front or proximal end of the humidifying material 224 and the heater housing 217. Since the hole 219 faces the front end of the humidifying material 224, the plate 225 allows gas to flow along the exposed side of the humidifying material 224. Note that the gas flows along the sides of the humidified material 224 with or without the plate 225.

  As shown in FIG. 12, the humidifying material 224 has a star-shaped pattern of 10 to 12 places, and the gas inside the gas humidifying device 201 is formed in the same manner as the humidifying material 24 of FIGS. 1 to 4. Help turbulence occur.

  In other embodiments, the second humidifying material 224 may be positioned out of phase with the first humidifying material such that it is separated from the first humidifying material by a spacer. Similar to that described above with reference to FIGS.

  As shown in FIG. 5, the assembled humidifying material 224, washer 221, inlet port 215, and heater housing 217 are inserted into the housing or outer shell 226. After the insertion, the front cap 213 is screwed or fitted into the heater housing 217. The housing 226 is made of a suitable material such as plastic or metal and has a downstream outlet 228 so that gas can flow out of the housing 226.

  As shown in FIGS. 5-9 and 11, the housing 226 includes a port 216 through which a syringe, a self-weight feed through a tube, or any number of pumps can be used. Fluid is injected into the humidified material 224. The infused fluid may include sterile water, a drug, or a mixture of fluids required for simple humidification or drug administration. The inner end of the port 216 is arranged such that the injected fluid drops on the housing 226 and immerses the entire humidified material 224 by capillary action. Port 216 is configured similarly to port 16 described above with respect to the embodiment of FIGS.

5-9, the housing 226 is inserted into the sleeve or shroud 230 and the port 216 is slid along the groove 232 formed in the sleeve 230 so that the outlet 228 is removed from the rear opening 234 of the sleeve 230. Extend. The sleeve 230 is fitted into the housing 226. The sleeve 230 is made of an insulating material so as to retain heat inside the housing 226 so that the operator handling the sleeve 230 is not exposed to excessive heat and does not significantly heat the ambient air. It is like that.
It should be noted that the sleeve 230, the housing 226, and the humidifying material 224 may be disposable, while the cap 213 and the heater housing 217 may be reusable.

  The gas humidifier 201 may include a temperature sensor, a humidity sensor, and a control circuit, as described above for the embodiments of FIGS. 1-4 and 18, and flows through the device and through the outlet 228. To control the temperature and humidity of the gas delivered to the patient.

  13 to 17 show a gas humidifier according to another embodiment. Since the gas humidifier 301 has essentially the same structure as the gas humidifier shown in FIGS. 5 to 12, the same reference numerals are given to the same components. One difference is that a second port 302 is added to the housing 226. The second port 302 is disposed between the humidifying material 224 and the outlet 228 so that the distal end of the catheter 304 can be inserted into the port 302. Depending on the substance to be delivered to the patient, the distal end of the catheter 304 can be placed in the port 302, in the gas humidifier 301, or in a tube attached to the outlet 228. , And can be in fluid communication with the patient's body part and within the patient's body. An example of a catheter that can be inserted into the gas humidifier 201 is the catheter disclosed in US Pat. No. 5,964,223, which is hereby incorporated by reference in its entirety. Other devices, such as lumens and endoscopes, can be inserted into the port 302 as described above for the catheter 304. Further, a tube or other known administration device can be inserted through the port 302 and extended from the outlet 228 to the patient side to carry gases, fluids, sprays, drugs, and the like to the patient. It should be noted that the substance administered to the port 302 by the administration device described above may have characteristics that increase the humidity of the gas inside the gas humidifier 301.

  The gas humidifier 301 may include a temperature sensor, a humidity sensor, and a control circuit, as described above for the embodiments of FIGS. 1-4 and 18, and flows through the interior of the device to the patient. Control the temperature and humidity of the gas.

  In each of the devices for humidifying and / or warming a gas described above with respect to FIGS. 1-18, the flowing gas has a humidity range of about 80-100% and a temperature range of about 90-105 ° F. It is desirable to achieve a constant flow rate of about 20 liters / minute.

  While the embodiments of the invention disclosed herein are considered to be preferred at this time, various changes and modifications can be made without departing from the spirit and scope of the invention. The above description is illustrative, exemplary, and exemplary and should not be construed as limiting the scope defined by the claims, and is included in the language of the claims and Any changes that would be considered equivalent are intended to be included.

FIG. 1 is a diagram illustrating a gas heating and / or humidifying device according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a gas heating and / or humidifying device having a plurality of baffles inside an outer shell according to a second embodiment of the present invention. FIG. 3 is a view showing a gas heating and / or humidifying device having an external temperature or humidity sensor according to a third embodiment of the present invention. FIG. 4 is a perspective view showing a cross section of the gas heating and / or humidifying device. FIG. 5 is an exploded perspective view showing a gas humidifier according to a fourth embodiment of the present invention. 6 is a perspective view showing an upper right side portion of the gas humidifier of FIG. FIG. 7 is a perspective view showing a lower right side portion of the gas humidifier of FIG. FIG. 8 is a top view showing the gas humidifier of FIG. FIG. 9 is a right side view showing the gas humidifier of FIG. FIG. 10 is a front view showing the gas humidifier of FIG. FIG. 11 is a rear view showing the gas humidifier of FIG. FIG. 12 is a top view showing one embodiment of a humidifying material used in the gaseous humidifier of FIG. FIG. 13 is a perspective view showing a gas humidifier according to a fifth embodiment of the present invention. FIG. 14 is a side view showing the gas humidifier of FIG. FIG. 15 is a side view of the gas humidifier shown in FIG. FIG. 16 is a right front view of the gas humidifier shown in FIG. FIG. 17 is a right rear view showing the gas humidifier of FIG. 13 in a partially broken view. FIG. 18 is a circuit diagram illustrating a heating circuit that can be used with the gas humidifier / gas warming and / or heating device shown in FIGS.

Claims (24)

In a gas humidifier for humidifying a gas supplied into a body cavity in endoscopic surgery,
An outer shell having an inlet for receiving gas and an outlet for discharging gas, extending in a longitudinal axis direction from the inlet toward the outlet;
A humidifying material that easily absorbs moisture and releases moisture when exposed to a dry environment, wherein the fluid is disposed between the outer shell and the inner peripheral surface of the outer shell. A humidifying material having an outer surface forming a flow passage having an annular cross section for passing from the inlet toward the outlet, a heater for adjusting the humidity of the gas passing through the gas humidifier, and
A suction device that is in fluid communication with the inlet and supplies gas from a gas source to the flow path, the control being configured to monitor at least one of gas temperature, gas flow rate, gas flow rate, and humidity An inhalation device comprising a device and controlling the heater;
With
The gas humidifier according to claim 1, wherein the outer shell has an inner peripheral surface configured to generate a turbulent flow in the gas when the gas passes along the outer surface of the humidifying material.   The gas humidifier according to claim 1, further comprising a coil disposed proximate to the outer shell, wherein the gas is forced by the outer shell to flow through the coil and through the coil.   The gas humidifier according to claim 1, wherein the outer shell has an inner surface having an irregular pattern.   The gas humidifier according to claim 1, wherein the outer shell includes an inner surface having a spiral barrier.   The gas humidifier according to claim 1, wherein the humidifying material has a cylindrical shape.   The gas humidifier according to claim 1, wherein a drug is injected into the humidifying material. In a gas humidifier for humidifying a gas supplied into a body cavity in endoscopic surgery,
An outer shell having an inlet for receiving gas and an outlet for discharging gas, extending in a longitudinal axis direction from the inlet toward the outlet;
A humidifying material that easily absorbs moisture and releases moisture when exposed to a dry environment, wherein the fluid is disposed between the outer shell and the inner peripheral surface of the outer shell. A humidifying material having an outer surface forming an annular cross-sectional channel for passing from the inlet to the outlet;
A heater for adjusting the humidity of the gas passing through the gas humidifier;
A suction device that is in fluid communication with the inlet and supplies gas from a gas source to the flow path, the control being configured to monitor at least one of gas temperature, gas flow rate, gas flow rate, and humidity An inhalation device comprising a device and controlling the heater;
A heater housing provided between the inlet and the humidifying material in the outer shell, and having a plurality of holes arranged in an annular shape for passing the gas from the inlet through the flow passage of the annular cross section;
A gas humidifier characterized by comprising: Wherein the plurality of holes, the gas humidifier of claim 7, characterized in that has a structure as to generate a turbulent flow of the plurality of holes in the gas when the gas passes.   The gas humidifier according to claim 7, wherein a pattern is formed on the outer surface of the humidifying material.   The gas humidifier according to claim 9, wherein the outer surface of the humidifying material has a sawtooth shape.   The gas humidifier according to claim 9, wherein the outer surface of the humidifying material has a star shape. A second humidifying material provided in the outer shell, spaced from the humidifying material in the direction of the longitudinal axis, that absorbs moisture easily and releases moisture when exposed to a dry environment. Te, between the inner peripheral surface of the outer shell, further comprising a second humidification material have a outer surface for forming a flow path of circular cross section for passing towards the outlet fluid from said inlet, said first The gas humidifier according to claim 7, wherein the outer surface of the humidifying material (2 ) has a configuration that generates turbulent flow when gas passes along the flow path.   The gas humidifier according to claim 12, further comprising a spacer interposed between the humidifying material and the second humidifying material.   The gas humidifier according to claim 12, wherein a pattern is formed on the outer surface of the second humidifying material.   The gas humidifier according to claim 14, wherein the phase of the outer surface of the second humidifying material is different from that of the outer surface of the humidifying material.   The gas humidifier according to claim 7, wherein a drug is injected into the humidifying material.   The gas humidifier according to claim 7, further comprising a humidity sensor for measuring the humidity of the gas flowing inside the gas humidifier.   The gas humidifier according to claim 7, further comprising a temperature sensor for measuring a temperature of a gas flowing inside the gas humidifier.   The gas humidifier according to claim 17, further comprising a temperature sensor for measuring a temperature of a gas flowing inside the gas humidifier.   The gas humidifier according to claim 18, wherein the temperature sensor measures the temperature of the gas by an indirect method.   18. The gas according to claim 17, wherein the control device is connected to the humidity sensor and controls humidity inside the gas humidifier based on a signal from the humidity sensor. humidifier.   19. The gas according to claim 18, wherein the control device is connected to the temperature sensor and controls the temperature inside the gas humidifier based on a signal from the temperature sensor. humidifier.   The control device is connected to the humidity sensor and the temperature sensor, and controls humidity and temperature inside the gas humidifier based on signals from the humidity sensor and the temperature sensor. The gas humidifier according to claim 19, wherein: A port provided in the outer shell;
A catheter inserted into the port;
The gas humidifier according to claim 7, further comprising:

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