34 results about "Nasopharyngeal cavity" patented technology

An inflatable nasopharyngeal stent is disclosed along with a method of using same. The stent comprises a central tube having a lumen defining a central inner chamber. A plurality of inflatable spokes are disposed along the central tube. The spokes are in fluid communication with the inner chamber of the central tube and are preferably aligned in groupings along the central tube. The outer ends of the spokes connect to a rib. The un-inflated stent is inserted into the nasal passageway through a naris and positioned such that so that a portion of the device is proximal to an anatomic structure exhibiting undesirable inflammation, configuration, growth or motility. Once positioned, the stent is inflated. Upon inflation, the ribs and adjoining web members move outwardly from the central tube and press upon the tissues of the nasopharyngeal cavity. Spaces between the inflatable spokes permit the passage of air along the stent and maintain airway patency.

Methods for cerebral and systemic cooling via a patient's nasopharyngeal cavity are described. In one method, a cooling assembly is inserted into a nasal cavity through a patient's nostril. A substantially dry gas is delivered through a lumen of the catheter onto the surface of the patient's nasal cavity. Evaporative heat loss cools the patient's nasal cavity. If additional cooling is needed, a liquid coolant is delivered through a separated lumen of the catheter. The liquid coolant is nebulized at a plurality of delivery ports on the distal end of the catheter and is delivered onto the surface of the patient's nasal cavity in combination with the dry gas. The dry gas enhances evaporation of the nebulized coolant and additional cooling is provided from the evaporative heat loss of the liquid coolant.

A chemiluminescent system for detecting the presence of influenza virus in a biological fluid sample is provided. An influenza diagnostic kit is provided which includes (1) a sampling device for obtaining the biological fluid from a subject, (2) a chemiluminescent substrate material which, in the presence of influenza virus in the biological sample, will generate a chemiluminescent product that will produce detectable light, and (3) a means for detecting any generated light. A liquid sample containing the biological fluid, and preferably a diluent, are contacted with the an absorbent material containing the chemiluminescent substrate material. The substrate responds to neuraminidase activity intrinsic to influenza A and influenza B virus particles, such that when the substrate is in contact with influenza virus, the substrate is cleaved to yield a chemiluminescent product that then decomposes to produce light which can then be detected. The chemiluminescent substrate materials include enzymatically triggerable 1,2-dioxetane derivatives of 4-alkoxy-N-acetylneuraminic acid and 4,7-dialkoxy-N-acetyineuraminic acid. The system is sufficiently simple that it can reliably be used by a layperson in a nonmedical setting. The biological fluid generally originates from the oral cavity, the pharyngeal cavity, or the nasopharyngeal cavity.

The invention relates to the technical field of antibacterial liquid, and in particular relates to an antibacterial liquid used for nasopharyal meatus and a preparation method thereof. The antibacterial liquid per liter is prepared from the following raw materials: 1.7 to 1.9g of dialkyl quaternary ammonium salt, 30 to 60ml of glycerinum, 0.1 to 1.3g of menthol, 0.9 to 3.0g of sodium chloride, 5 to 8g of extracts of traditional Chinese medicine, and the balance of purified water. The antibacterial liquid adopts a plurality of raw materials capable of clearing heat, dispelling wind, relieving sore throat, resisting inflammation, resisting bacteria and easing pain; all the raw materials supplement each other and develop the synergism to realize the characteristics of the best antibacterial performance, short treatment course and quick return of the antibacterial liquid. The biocompatibility of the antibacterial liquid meets the requirement of GB / T 16886.11-2011, and the microbiological indicator meets the requirement of GB15979-2002. The antibacterial liquid is applicable to control and nursing of nasal infection, oral infection, throat infection, various acute (chronic) rhinitis, pharyngitis, auditory meatus inflammation, dental ulcer, and skin and mucous membrane wound infection, and can be used for promoting the healing of the wound and reducing the postoperative infection.

Methods for cerebral and systemic cooling via a patient's nasopharyngeal cavity are described. In one method, a cooling assembly is inserted into a nasal cavity through a patient's nostril. A substantially dry gas is delivered through a lumen of the catheter onto the surface of the patient's nasal cavity. Evaporative heat loss cools the patient's nasal cavity. If additional cooling is needed, a liquid coolant is delivered through a separated lumen of the catheter. The liquid coolant is nebulized at a plurality of delivery ports on the distal end of the catheter and is delivered onto the surface of the patient's nasal cavity in combination with the dry gas. The dry gas enhances evaporation of the nebulized coolant and additional cooling is provided from the evaporative heat loss of the liquid coolant.

The invention relates to a nasal cavity cleaning agent which comprises the following raw materials by weight: 10-22 parts of dandelions, 5-13 parts of balloonflower roots, 5-13 parts of cockleburs, 5-12 parts of radix angelicae, 3-8 parts of cimicifugae foetidae, 5-17 parts of kudzu roots, 10-17 parts of red paeony roots, 5-14 parts of scutellaria baicalensis, 10-16 parts of cordate houttuynia, and 2-8 parts of licorice. The product is prepared by extracting the plurality of natural Chinese herbal medicines, has less toxic or side effect, is clinically safe and reliable, can remove harmful substances in nasal cavities and nasopharyngeal cavities, has the effect of health care and diseases prevention, and thus can improve human life quality.

The invention discloses a nasopharyngeal carcinoma positioning segmentation method and system based on an image segmentation convolutional neural network, and the method comprises the steps: obtaining an electronic nose endoscopic image through employing a WLI mode and an NBI mode, inputting the electronic nose endoscopic image into a nasopharyngeal carcinoma diagnosis model based on the image segmentation convolutional neural network, obtaining a malignant tumor region marked by the diagnosis model, and carrying out the positioning segmentation of the nasopharyngeal carcinoma. The diagnosis system can judge the captured image in real time, mark the malignant tumor part in the nasopharyngeal carcinoma image, export the diagnosis result, intuitively judge whether the target lesion is the malignant tumor tissue or not and determine the boundary range of the malignant tumor lesion according to the malignant tumor lesion as long as the lens is focused on the suspicious lesion tissue in the nasopharyngeal cavity. Suspicious diseased regions are quickly selected for biopsy, so that the accuracy of nasopharyngeal carcinoma detection under a nasal endoscope is effectively improved, and the detection rate of biopsy is increased.

Devices for cerebral and systemic cooling via a patient's nasopharyngeal cavity are described. Cooling assemblies include at least one elongate tubular member having first and second lumens, a source of liquid coolant, a gas source communicating with the first lumen, and a switch for alternately connecting the liquid coolant source to the second lumen. The first lumen transports a compressed gas and the second lumen transports a volatile liquid. The pressurized fluid may be a perflurocarbon. The perfluorocarbon may be perfluorohexane, perfluoropentane, or 2-methyl-perfluoropentane. The gas may be air, oxygen, or a combination.

A noninvasive, brain cooling method and device for cerebral cooling via a patient's nasopharyngeal cavity, is described. Thermal conductive nasal prongs are inserted into a nasal cavity and are cooled by thermoelectric cooling elements. An outward air driving fan inside the device drives a cold air current through the nasal and oral cavities. Heat transfer between the cold air and the surface of the nasal cavity cools the nasal cavity, which in turn, cools a patient's brain. Real-time temperature sensing data provides feedback for closed-loop cooling control.

An inflatable nasopharyngeal stent is disclosed along with a method of using same. The stent comprises a central tube having a lumen defining a central inner chamber. A plurality of inflatable spokes are disposed along the central tube. The spokes are in fluid communication with the inner chamber of the central tube and are preferably aligned in groupings along the central tube. The outer ends of the spokes connect to a rib. The un-inflated stent is inserted into the nasal passageway through a naris and positioned such that so that a portion of the device is proximal to an anatomic structure exhibiting undesirable inflammation, configuration, growth or motility. Once positioned, the stent is inflated. Upon inflation, the ribs and adjoining web members move outwardly from the central tube and press upon the tissues of the nasopharyngeal cavity. Spaces between the inflatable spokes permit the passage of air along the stent and maintain airway patency.

The invention relates to a nasopharyngeal surface anesthesia apparatus comprising a nasopharyngeal surface anesthesia catheter (5) and a syringe (4). The nasopharyngeal surface anesthesia apparatus is used for sufficient deep nasopharyngeal surface anesthesia before sobering nasotracheal intubation and nasopharyngeal deep treatment for a patient, thus preventing the patient from feeling uncomfortable and rejecting when a catheter is inserted into a nasopharyngeal channel or during treatment. The existing nasopharyngeal catheter is provided with a certain amount of outlets of anesthetic, the syringe is provided, and the complete nasopharyngeal anesthesia apparatus is formed; therefore, chances of the patient feeling uncomfortable and rejecting are slimmer, and surgery is smooth. The nasopharyngeal surface anesthesia apparatus is applicable to sobering nasotracheal intubation and deep nasopharyngeal treatment.

The invention discloses an oral and nasal cavity esophagus conductor which comprises a nasal cavity duct and an elastic leading core, wherein the nasal cavity duct is placed into a nasopharyngeal cavity so as to establish a channel at an external naris and a rear naris outlet, then the elastic leading core can be fed into an oral cavity from the rear naris outlet under the leading of the channel; the elastic leading core is fed into the oral cavity under the leading of the nasal cavity duct, and is temporarily connected with a nasobilliary duct after moving out of the oral cavity, then the nasobilliary duct can be fed into the nasal cavity from the rear naris outlet and is led outside the nasal cavity from the outer naris. A leading cavity is formed in the nasal cavity duct, the head end of the leading cavity is bent in a J-shaped manner, and an included angle of 15-90 degrees is formed between a long axis of the elastic leading core after being led outside the leading cavity under the leading of the J-shaped bending of the head end of the leading cavity and a long axis in the leading cavity. The elastic leading core is a light guiding rope of which the surface is coated with a reflecting material; an elastic ring body is arranged at the head end of the elastic leading core. The oral and nasal cavity esophagus conductor is simple in structure, convenient to use, safe and effective, a bile duct can be rapidly and effectively led into the nasal cavity after the nasobilliary duct is embedded under an endoscope, pain of a patient can be reduced, and operation difficulty of medical operators can be reduced.

The invention discloses a mouth opening training device for a patient with nasopharyngeal carcinoma or limitation in mouth opening after nasopharyngeal carcinoma radiotherapy. The device comprises a mouth opening training component (1) and an operation component matched with the mouth opening training component (1), and is characterized in that the mouth opening training component (1) is a cone with a thick end and a thin end; the operation component is formed by rigidly fixing an operation handle (3) and a connecting piece (2); and the connecting piece (2) is connected with the mouth opening training component (1) in such a manner that the connecting piece (2) and the mouth opening training component (1) can move relatively in the axial direction. The technical problem to be solved by the invention is how to provide a simple mouth opening training device for the patient with nasopharyngeal carcinoma or limitation in mouth opening after nasopharyngeal carcinoma radiotherapy, the mouth opening training device can be carried about and used by a user at any time and is simple to operate and convenient to use and clean, and furthermore, the pollution to the mouth opening training component caused by direct contact with the hands of the patient is avoided.

Described herein is a head cooling system comprising: a source of compressed breathable gas; a vortex tube comprising an inlet, a hot gas outlet and a cold gas outlet, the inlet operably connected to the source of compressed breathable gas; and an interface for delivering cooled gas to a nasopharyngeal cavity in fluid communication with the cold gas outlet. The head cooling system may be used in a method to reduce neurodegeneration in a subject, for example neurodegeneration from ischemia, anoxia, cardiac arrest, trauma or neurodegenerative disease. The head cooling system may also be used in a method to prophylactically protect a subject at risk of neurodegeneration, for example neurodegeneration from ischemia, anoxia, cardiac arrest, trauma or neurodegenerative disease.

The invention provides a nasopharynx flusher which comprises a liquid storage bottle, a pressurizing device and a flushing hose with a flushing hole in the end. The flushing hose is a three-way tube and comprises a head part for liquid output, a middle part for liquid guiding and two tail parts for liquid feeding. An arc face is arranged at the top end of the head part, the flushing hole is formed in the top end of the head part of the flushing hose, and an airbag is arranged at the joint of the head part and the middle part. The middle part comprises a cleaning liquid channel and a pressurized fluid channel separated from the cleaning liquid channel. Hand touch scales protruding outwards are arranged on the outer surface of the middle part. The tail parts comprise the first tail part communicated with the flushing hole through the cleaning liquid channel and the second tail part communicated with the airbag through the pressurized fluid channel. The liquid storage bottle communicates with the first tail part through the pressurizing device, the pressurizing device is a liquid pump, and a check valve is arranged in the second tail part. The nasopharynx flusher is easy and convenient to use, can flush the nasal cavity and the nasopharynx, and can carry out hemostasis by compression to deal with the situation that the pharyngonasal cavity bleeds.

A noninvasive, brain cooling method and device for cerebral cooling via a patient's nasopharyngeal cavity, is described. Thermal conductive nasal prongs are inserted into a nasal cavity and are cooled by thermoelectric cooling elements. An outward air driving fan inside the device drives a cold air current through the nasal and oral cavities. Heat transfer between the cold air and the surface of the nasal cavity cools the nasal cavity, which in turn, cools a patient's brain. Real-time temperature sensing data provides feedback for closed-loop cooling control.

The invention discloses an adjustable nasal cavity cleaner, and belongs to the technical field of nasopharynx cleaning. A flushing assembly is arranged at the upper end of the bottle body, and an infusion device is arranged in the bottle body; the flushing assembly comprises a cleaning head corresponding to the nasal vestibule nostrils, a cleaning pipe capable of extending out along the cleaning head, and a sliding strip used for sliding the cleaning pipe to enable the cleaning pipe to extend out of the cleaning head; the extending end of the cleaning pipe is provided with a cleaning opening, an optical lens and an LED lamp, the cleaning opening is communicated with a liquid conveying device through a washing channel in the cleaning pipe, the optical lens is connected with a display screen installed on the side wall of the bottle body through optical fibers in the cleaning pipe, and the portion, corresponding to the extending portion of the cleaning pipe, of the cleaning head is provided with an annular spraying opening. The cleaning device can be used for cleaning thick materials deep in the nasopharyngeal cavity through manual control, so that recovery of a patient with nasopharyngeal carcinoma after treatment is facilitated.

A device / system and method for the delivery of light to the nasopharyngeal cavity in a controlled and reproducible mariner using at least one optical fiber having a linear diffusing tip, a spherical diffusing tip, or a bare cut end is disclosed. A positioning device may have one or two flexible guide tubes that are attached to a preformed shaped base that is introduced into the nasopharyngeal cavity to guide and position the optical fibers and / or detector(s). The optical fibers are enclosed within shielding tubes which are inserted into the guide tubes. The optical fibers may be further moved within the shielding tube so as to adjust the amount of output light. Also included within the guide tube is a light detector that monitors, detects, and measures the delivery of fluence rates to pre-determined locations in the nasopharyngeal cavity. The detector may also be enclosed within a separate tube within the guide tube. The inventive device / system also has a means of shielding pre-selected areas of the nasopharyngeal cavity or adjacent tissues from the light delivered by the optical fibers. The system of the present invention uses a control unit and preselected treatment parameters to monitor, regulate, and display laser output and fluence rates at preselected locations in the nasopharyngeal cavity during PDT treatment.

The invention relates to the technical field of antibacterial liquid, and in particular relates to an antibacterial liquid used for nasopharyal meatus and a preparation method thereof. The antibacterial liquid per liter is prepared from the following raw materials: 1.7 to 1.9g of dialkyl quaternary ammonium salt, 30 to 60ml of glycerinum, 0.1 to 1.3g of menthol, 0.9 to 3.0g of sodium chloride, 5 to 8g of extracts of traditional Chinese medicine, and the balance of purified water. The antibacterial liquid adopts a plurality of raw materials capable of clearing heat, dispelling wind, relieving sore throat, resisting inflammation, resisting bacteria and easing pain; all the raw materials supplement each other and develop the synergism to realize the characteristics of the best antibacterial performance, short treatment course and quick return of the antibacterial liquid. The biocompatibility of the antibacterial liquid meets the requirement of GB / T 16886.11-2011, and the microbiological indicator meets the requirement of GB15979-2002. The antibacterial liquid is applicable to control and nursing of nasal infection, oral infection, throat infection, various acute (chronic) rhinitis, pharyngitis, auditory meatus inflammation, dental ulcer, and skin and mucous membrane wound infection, and can be used for promoting the healing of the wound and reducing the postoperative infection.

The invention discloses a high-comfort breathing management tool suitable for supine patient. According to the technical solution of the invention, the high-comfort breathing management tool suitablefor supine patient comprises a nasal ventilation tube capable of being placed in a nasal cavity, a nasopharyngeal ventilation tube capable of being placed in nasopharyngeal cavity through another nasal cavity, and a breathing connection tube communicating with the nasal ventilation tube and the nasopharyngeal ventilation tube. The nasal ventilation tube and the nasopharyngeal ventilation tube canbe matched with the nasal cavities being placed separately. The required mechanically controlled ventilation is performed after the nasal ventilation tube and the nasopharyngeal ventilation tube can connected to ventilator or anesthesia machine through the breathing connection tube. The breathing management tool has a compact structure, and the nasal respiratory support can be achieved effectively. Moreover, active oral drainage can be achieved during the nasal respiratory support, thereby improving the tolerance of patients, and the breathing management tool is easy to use and is safe and reliable.

The sampler comprises a sampling probe, a telescopic piece and a sampling test tube, the sampling probe is connected with the telescopic piece, the sampling test tube comprises a containing cavity, the containing cavity is provided with a first opening, the telescopic piece is arranged at the first opening and seals the containing cavity, and the telescopic piece and the sampling test tube are both made of elastic materials; when the sampling test tube is in an initial state, the telescopic piece and the sampling probe are accommodated in the accommodating cavity; when the sampling test tube is pressed, the telescopic piece drives the sampling probe to extend out of the accommodating cavity for sampling. The sampling probe is connected with the telescopic piece, and the telescopic piece can drive the sampling probe to sample by pressing the sampling test tube; the sampling probe can be driven to retract into the sampling test tube through the telescopic piece by releasing the sampling test tube. The telescopic piece is of a flexible structure, the sampling head is driven by the telescopic piece to sample, stimulation of the sampling probe to the nasopharyngeal cavity in the sampling process can be reduced, the experience of a sampled person is improved, and meanwhile the sampling success rate is increased.

The invention discloses a nasopharynx cancer plasma treatment generating device. An insulating tube is sleeved with a stainless steel sleeve, a first annular electrode and a second annular electrode are coaxially arranged in the insulating tube and spaced, the interiors of the first annular electrode and the second annular electrode are sequentially communicated to jointly form a plasma generatingchannel, an air inlet is formed in one end of the plasma generating channel, and a plasma jet orifice is formed in the other end of the plasma generating channel. The nasopharynx cancer plasma treatment generating device in optimization design can be installed on a nasal endoscope, plasma is generated in the plasma generating channel, the nasal endoscope stretches into the nasal cavity, the plasma is generated under a discharge effect, and therefore malignant tumors on the top and the side wall of the pharyngonasal cavity can be killed under a clear view. The invention further provides the nasal endoscope.

A chemiluminescent system for detecting the presence of influenza virus in a biological fluid sample is provided. An influenza diagnostic kit is provided which includes (1) a sampling device for obtaining the biological fluid from a subject, (2) a chemiluminescent substrate material which, in the presence of influenza virus in the biological sample, will generate a chemiluminescent product that will produce detectable light, and (3) a means for detecting any generated light. A liquid sample containing the biological fluid, and preferably a diluent, are contacted with the an absorbent material containing the chemiluminescent substrate material. The substrate responds to neuraminidase activity intrinsic to influenza A and influenza B virus particles, such that when the substrate is in contact with influenza virus, the substrate is cleaved to yield a chemiluminescent product that then decomposes to produce light which can then be detected. The chemiluminescent substrate materials include enzymatically triggerable 1,2-dioxetane derivatives of 4-alkoxy-N-acetylneuraminic acid and 4,7-dialkoxy-N-acetylneuraminic acid. The system is sufficiently simple that it can reliably be used by a layperson in a nonmedical setting. The biological fluid generally originates from the oral cavity, the pharyngeal cavity, or the nasopharyngeal cavity.

The nasal cavity stent comprises a stent body, the stent body is of a tubular structure, a spray irrigation channel with an open end and a closed end is integrally formed in the annular side wall of the tubular structure, the open end is used for being connected with a spray and suction source, and spray and suction holes are formed in the side wall of the spray irrigation channel. According to the scheme, the characteristics of the nasal cavity support are ingeniously utilized, the nasal cavity support is not limited by a nasal threshold and a special structure, all-directional flushing, dosing, dirt suction and other operations are carried out on mucosa in the nasal cavity, on one hand, operation and control are convenient, on the other hand, nasal cavity irrigation and suction of special parts become possible, the nasal cavity flushing removal rate is increased, and the nasal cavity cleaning efficiency is improved. According to the technical scheme, accurate drug delivery of special parts is achieved, and the novel nasal cavity internal medicine intervention device is a brand new technical scheme for nasal cavity internal medicine intervention, is particularly suitable for treatment of diseases such as infection and allergy of the nasal cavity, the nasopharyngeal cavity and the eustachian tube, is also suitable for treatment in the nasal cavity mucosa perioperative period after a nasal operation, promotes mucosa recovery and prevents adhesion and relapse.

The invention discloses a guide core type tongue posterior falling prevention low-oxygen catheter and application, and relates to the technical field of medical instruments. The catheter comprises a catheter unit, a connector unit and a supporting guide core. The catheter unit comprises a hollow hose capable of being used for nasopharynx ventilation; the connector unit comprises a connector head end and a connector tail end, the connector head end is detachably connected with the first connector, and the connector tail end is used for being connected with external equipment; the supporting guide core comprises a second connector and a flexible guide core with flexibility, and the flexible guide core comprises a plurality of movable joint modules which are sequentially connected end to end; during intubation, the soft guide core forms a bent shape matched with the nasopharyngeal cavity by adjusting the connecting angle between the movable joint modules. Steering adjustment is carried out through the soft guide core to guide the catheter to form a matched shape, the nasal mucosa damage and bleeding occurrence rate and the implantation success rate are remarkably reduced, operation is convenient, and external equipment can be conveniently connected.

The minimally invasive adenoid eliminating device can solve the problem that the size is limited when the device enters the nasopharyngeal cavity; the whole structure of the device can be contracted; the device enters the nasopharyngeal cavity after being contracted and is unfolded in the operation process; the size problem of instruments in the process of entering the nasopharyngeal cavity is effectively solved; the adenoid excision instrument can be unfolded in the operation process; then adenoid excision is carried out after a Eustachian tube round pillow is protected; fine adjustment can be carried out on adenoid in the excision process; damage to surrounding tissue is prevented, meanwhile; the image of the excision part can be seen in real time in the excision process; excision is more accurate; and the operation efficiency is improved. According to the technical scheme, the adenoid body eliminating device comprises an adenoid body eliminating plate, the eliminating plate is arranged in a protective shell, the protective shell is driven by a driving connecting device, and meanwhile the protective shell is adjusted through a posture adjusting device. And a surgical instrument can extend into a nasopharyngeal cavity in a space as small as possible in a surgical process.

The invention relates to such heavy symptoms caused by common cold as viral encephalitis, paralysis caused by limb muscle atrophy, epilepsy and coma and the like, so that the common cold is not common. The inventor considers that rhinovirus and coronavirus have special tropism on human brains, immediately enter the brains through blood brain barriers once entering blood flow to trigger immune response and damage nerve cells, and besides pain and fever, and various serious diseases may occur, therefore the common cold must be prevented, only antiviral drugs can be used, but the antiviral drugs have oral defects, after absorption, metabolism, excretion and distribution in vivo, a very small amount is reserved and is discharged from oral cavities, the concentration is very small, no antitoxic effect is produced, if pathogen has considerable resistance, the antiviral drugs are more helpless. Microcrystalline cellulose is better, which can not only adsorb virus, but also can adsorb bacteria (pneumococci and rhinopathy live in nasopharyngeal cavities, secondary pneumonia frequently occurs in the case of cold), the microcrystalline cellulose can forcefully adsorb and eliminate the viruses and bacteria no matter the same has tolerance or not, so as to effectively prevent and treat cold and secondary bacterial infection.

The invention discloses a nasopharyngeal cavity cooling catheter for selective brain target temperature management, the nasopharyngeal cavity cooling catheter comprises a double-cavity catheter, a tail end balloon and two mutually independent branch tube channels, one end part of the double-cavity catheter is connected with the branch tube channels into a whole, the other end part of the double-cavity catheter is connected with the tail end balloon into a whole, a water inlet hole and a water outlet hole which are used for water inflow and water outflow are formed in the ends of the two independent branch pipe channels respectively, and a physical cooling instrument is arranged outside the branch pipe channels and used for controlling the flow speed and pressure of cooling water, so that the cooling water is driven to circularly flow in the sacculus at the cooling catheter end through the double-cavity catheter and does not make direct contact with peripheral tissue. By means of the mode, the product is safe and effective to patients, nerve prognosis and the survival rate can be improved, complications related to whole body cooling can be prevented, direct continuous cooling can be conducted on nasopharyngeal cavities, non-invasive brain temperature reduction can be conducted, and target temperature management of brain temperature can be conducted.