43 results about "Nasal duct" patented technology

The invention relates to the technical field of RT type lacrimal passage drainage tube application, and particularly discloses an RT tube application method for simultaneously solving upper and lower lacrimal passage blockage, which comprises the following steps of: firstly, performing preoperative local anesthesia on a patient; the upper lacrimal punctum and the lower lacrimal punctum of the diseased eye are expanded, and after a thin probe is used for probing the obstruction position of the lacrimal passage from the upper lacrimal ductule and the lower lacrimal ductule, the lacrimal passage is flushed Expanding the obstructed part of the lacrimal passage by using a large probe; then, the artificial lacrimal duct is implanted, the RT tube is implanted into the upper and lower lacrimal ducts at the same time, the problem of blockage of multiple parts is solved through a single instrument, repeated damage to periorbital tissue caused by fractional operations is avoided, and the device is particularly suitable for complex cases that upper and lower lacrimal canalicules and nasolacrimal ducts are blocked or narrow at the same time; the whole-course drainage of the tears from the upper and lower lacrimal passages to the nasal cavity is further ensured, and the physiological path of tear circulation is recovered; the RT tube is placed, skin or mucous membrane does not need to be cut open, no scar is visible after operation, and the requirement for periocular beauty is met.

The invention belongs to the field of medical instruments, and provides an otolaryngological patient nose medicine applying nursing device which comprises a nasal tube, a medicine inlet is formed in one side of the nasal tube, a sealing plug is in threaded connection with the side wall of the medicine inlet, a medicine outlet is formed in the other end of the nasal tube, an adjusting tube is fixedly installed at the upper end of the nasal tube, and an adjusting piece is arranged on the upper side of the adjusting tube. An upper cavity and a lower cavity are formed in the nasal tube, the upper cavity is communicated with the medicine inlet, the lower cavity is communicated with the medicine outlet, a through hole is formed between the upper cavity and the lower cavity, a partition plate is arranged on the lower side of the through hole in a sliding mode, and a plurality of evenly-distributed sliding columns are fixedly installed on the lower surface of the lower cavity; by arranging a mechanical linkage mechanism composed of the upper cavity, the lower cavity, the through hole, the partition plate with the reset spring and the extrusion block driven by the adjusting piece, quantitative and controllable conveying of liquid medicine is achieved, when the adjusting piece is operated, a user can indirectly control medicine feeding in an operation mode such as rotation, and operation is more labor-saving and accurate.

A securement device for a system for securing a nasal tube is provided. The securement device includes a bridle having a body extending between a first end and a second end. The body has a lobed or star shape. The securement device further includes a magnetic connection portion disposed at the first end of the bridle. A system for securing a nasal tube can include a securement device as described above, and a retrieval probe. The retrieval probe can include a catheter extending between a proximal end and a distal end; and a magnetic tip disposed at the proximal end. The magnetic connection portion of the bridle and the magnetic tip of the retrieval probe can be configured to magnetically couple during a procedure for inserting the bridle in a nasal passageway of a patient.

The utility model discloses an ear-nose-throat medicine sprayer which comprises a liquid medicine bottle, a first check valve, a round box, an arc-shaped piece, an inserting pipe, a disposable nose pipe, a second check valve, a first rubber plug, a second rubber plug, a rubber ring, a bacteria filtering round piece and a thin hole. The syringe is reasonable in structural design, liquid medicine is prevented from being pressed into the round box during medicine injection, and bacteria can be prevented from entering the syringe due to the fact that the end openings of the fine holes are covered with the bacteria filtering round pieces; the disposable nasal tube can be installed or taken down by slightly applying force outwards or inwards with fingers, cross infection of patients is avoided, liquid medicine in a liquid medicine bottle can be injected into the disposable nasal tube, the effect of spraying medicine into the nasal cavity is achieved, the mode that a traditional medicine sprayer is pressed downwards to inject liquid medicine is changed, and the disposable nasal tube is relatively labor-saving and convenient to use.

The utility model relates to the technical field of medical instruments, and discloses an oxygen tube nose clip for clinical respiration, which comprises an oxygen tube, two nasal ventilation tubes are fixedly connected to the middle of the oxygen tube, a plurality of air outlets are arranged outside the nasal ventilation tubes, a fixing ring is fixedly connected to the top of each nasal ventilation tube, and the oxygen tube is fixed to the fixing ring. The inner wall of the fixing ring is fixedly connected with a connecting assembly used for being connected with a follow-up mechanism, the other end of the connecting assembly is fixedly connected with a piston, the inner wall of the stuffy nose tube is slidably connected with a foam light ring, and the outer wall of the fixing ring is fixedly connected with a fixing assembly used for fixing the nasal splint to the nasal cavity opening of a patient. The fixing assembly comprises a plurality of springs, and the close ends of the springs are fixedly connected to the outer wall of the fixing ring. According to the oxygen supply device, the breathing process and the exhaling process are separated, oxygen and exhaled air are prevented from being mixed during secondary breathing, the purity of oxygen inhaled by a patient is guaranteed, and the oxygen supply effect and the treatment effect are improved.

This utility model provides an improved disposable sterile oxygen inhalation tube, including a flared inlet tube, an ultra-soft nasal inlet tube, an adjusting ring, a connecting tube, and a catheter. The air inlet end of the catheter is fixedly connected to one end of the flared inlet tube, and the ultra-soft nasal inlet tube is fixedly connected to the catheter via the connecting tube. This utility model relates to the technical field of disposable oxygen inhalation tubes. By setting up a storage mechanism, this utility model allows the ultra-soft nasal inlet tube and catheter to be bent and moved near the flared inlet tube. Then, the flared inlet tube is rotated towards the storage box, causing the strap to wrap around the flared inlet tube, ultra-soft nasal inlet tube, and catheter. Finally, when the first Velcro fastener and the second Velcro fastener are attached together, the catheter and ultra-soft nasal inlet tube are bound together. Afterward, it is placed in the storage box, the lid is closed, and the male and female fasteners are connected, thus preventing catheter contamination and reducing the risk of hospital-acquired infections.

The utility model provides a nasal cavity irrigator, relates to the technical field of nasal irrigators, and solves the technical problem that the flow rate of cleaning fluid in each group of channels is inconvenient to control in the conventional double-channel nasal cavity irrigator. The cleaning device comprises a main body used for extracting cleaning liquid and introducing the cleaning liquid into a cleaning pipe, the tail end of the cleaning pipe is provided with a double-channel adjusting disc used for adjusting the flow speed of the cleaning liquid, and the double-channel adjusting disc comprises a cavity used for single-channel input and double-channel output and a first rotating disc used for controlling the opening and closing degree of double output channels at the same time. The double output channels of the double-channel adjusting disc are connected with a first nasal tube and a second nasal tube respectively. The double-channel adjusting disc can adapt to various application conditions of nasal cavity irrigation, flow speed can be adjusted through double-nasal-cavity irrigation, flow speed can be adjusted through single-nasal-cavity irrigation, use is convenient, and adjustment can be conducted without a built-in valve and the like.

The utility model relates to the technical field of medical supplies, in particular to a nasal cavity medicine applying device which comprises an outer nasal tube, one end of the outer nasal tube is fixedly provided with a left suppository head and a right suppository head respectively, the outer wall of the left suppository head and the outer wall of the right suppository head are sleeved with plug columns, and one end of the outer nasal tube is further fixedly provided with a medicine guide rod. The plunger is simultaneously strung on the medicine guide rod, the other end of the outer nasal tube is bent, and a nasal bracket is further arranged at the other end of the outer nasal tube. According to the nasal cavity medicine applying device, after the cavernous bodies are stuffed into the nostrils, the nose bracket supports the cavernous bodies through the lower nose bridge to be attached to the upper nose bridge, so that the nasal cavity medicine applying device is fixed without independently depending on interference fit between the cavernous bodies and the nostrils, and the nose bracket can share most or all pressure; therefore, the nose bracket can be stably attached to the position of the upper nose bridge when a patient lowers the head or contracts and moves the nasal cavity in use, and the comfort level and convenience of a user are improved.

The invention relates to a multifunctional fixing nasal paste and an application method thereof, according to the multifunctional fixing nasal paste designed by the invention, on the existing basis, a medical nasal paste for improving ventilation of a patient is additionally arranged on a non-woven fabric, and ventilation can be stimulated. The detachable acupoint patch is independently arranged, the Yingxiang acupoint can be positioned, medicine stimulation can be conducted, and therefore the using effect of the fixed nasal patch is enhanced. In order to solve the problem that the adhesive tape is not firmly wound on the nasal tube in the treatment process of a patient, the buckle and the matched sticking buckle are arranged at the front end of the nasal paste main body and are used for buckling the silica gel soft nasal tube, so that hoses such as the nasal tube can be fixed, the nasal tube is prevented from being disordered, the traction force of the nasal tube to the nasal paste can be reduced, and the nasal paste is firmer to use; the medicine is not easy to tear off by patients. And the buckled nasal tube is dispersed towards the two sides of the nose, so that the mouth of the patient is not influenced, and eating is not influenced.

The invention discloses a nasolacrimal duct dilation assembly and a nasolacrimal duct dilation system.The nasolacrimal duct dilation assembly comprises a balloon body provided with a pressurizing cavity; the hard elastic piece is arranged on the balloon body, the hard elastic piece at least extends to the second end of the balloon body from the first end of the balloon body, the first end of the elastic piece is provided with a spherical part, and the spherical part is located at the first end of the balloon body; the catheter is arranged at the second end of the balloon body, the catheter is provided with a first communication port and a first channel, and the first channel is communicated with the pressurizing cavity and the first communication port.

The present application discloses a nasal oxygen supply apparatus, comprising: a cylinder, an oxygen supply tube attached to both ends of the cylinder and communicating with an inner cavity of the cylinder; a nasal tube for insertion into a nostril of a patient so that oxygen provided by the oxygen supply tube enters the inner cavity and is supplied to the nostril of the patient through the nasal tube; an exhalation valve allowing exhaled gas from the nostril of the patient to flow to the outside while limiting outside air from entering the inner cavity when the patient inhales; a throttle valve for making the pressure of oxygen in the downstream inner cavity less than the pressure of oxygen in the upstream inner cavity; a valve structure comprising a valve cavity and a valve component, both ends of the valve cavity communicating with outside air and the inner cavity respectively, the valve component being arranged in the valve cavity for controlling the opening and closing of the valve cavity; when the pressure in the oxygen supply tube is greater than a preset pressure, the valve component generates a first action to close the valve cavity, and when the pressure in the oxygen supply tube is less than the preset pressure, the valve component generates a second action to open the valve cavity.

The invention discloses a respiration guiding device used in a liver cancer three-dimensional conformal radiotherapy process, the respiration guiding device comprises a guiding device, the guiding device comprises a guiding block, a nasal plug block, a nasal tube, a guiding groove, a supporting sheet and a fitting groove, the fitting groove is formed in the inner side of the guiding block, the guiding groove is arranged on one side of the guiding block in a penetrating mode, and the supporting sheet is arranged in the fitting groove. Clamping grooves are formed in the two ends of the guide groove, the supporting piece is detachably connected with the clamping grooves, the nasal tube penetrates through the guide groove, the nasal tube horizontally penetrates through the two ends of the nasal plug block, the guide block transmits the situation that in-vivo air pressure of a patient is increased in the radiotherapy process, so that the thoracic cavity is expanded to the nasal tube, and the oxygen delivery amount entering the body of the patient is finely adjusted; meanwhile, air pressure is balanced under the action of the air pressure balancer to prevent the air pressure in the body from being too small.

The utility model discloses a lacrimal passage flushing operation model which comprises a simulation skull, a simulation muscle patch, a simulation lacrimal passage system and a simulation skin patch, and a patch mounting groove is formed in the front face of the simulation skull; the simulated muscle patch is attached to the simulated skull and located in the patch mounting groove; an assembly groove is formed in one side, facing the simulated skull, of the simulated muscle patch; the simulated lacrimal passage system is arranged in the assembly groove; the simulation skin patch is attached to the simulation skull and covers the simulation muscle patch. The lacrimal passage structure is displayed in a layered mode according to the sequence of three-dimensional anatomy, the lacrimal passage flushing scene is simulated, on-off switches can be arranged at the positions of a lacrimal canaliculus, a lacrimal duct, a nasolacrimal duct and the like, different lesion conditions can be simulated, the scene of lacrimal passage flushing operation can be visually and truly displayed in the teaching process, and the teaching efficiency is improved. And the learning and training effects of students can be improved.

The utility model discloses a snorting structure for oxygen uptake, which comprises a bottom support, a cover body, a joint and belt bodies, two nasal tubes are arranged on the bottom support, the bottom support is arranged at the bottom of the cover body, the nasal tubes are communicated with the space enclosed by the cover body, the joint is arranged on the cover body and communicated with the space enclosed by the cover body, one end of each belt body is arranged on the cover body, and the other end of each belt body is connected with the cover body. And the other ends of the two belt bodies are respectively provided with a connecting buckle. According to the snorting structure for oxygen inhalation, the free ends of the two band bodies can be connected through the binding band, when oxygen inhalation is needed, an oxygen catheter on an oxygen generator is inserted into the connector, the binding band is sleeved on the head to be fixed to ensure that the two nasal tubes on the bottom support are inserted into the nostrils, and after oxygen inhalation is completed, when storage and tidying are needed, the binding band is fixed to the connector. The oxygen catheter on the oxygen generator is pulled out from the connector, the snorting structure is independently stored and tidied, the oxygen catheter does not need to be stored together, wearing and storage are very convenient, and adhesive tape does not need to be used for bonding and fixing when the oxygen generator is worn.

The utility model discloses a nasolacrimal duct dilatation assembly and a nasolacrimal duct dilatation system.The nasolacrimal duct dilatation assembly comprises a sacculus body provided with a pressurizing cavity; the hard elastic piece is arranged on the balloon body, the hard elastic piece at least extends to the second end of the balloon body from the first end of the balloon body, the first end of the elastic piece is provided with a spherical part, and the spherical part is located at the first end of the balloon body; the catheter is arranged at the second end of the balloon body, the catheter is provided with a first communication port and a first channel, and the first channel is communicated with the pressurizing cavity and the first communication port.

The utility model discloses an indwelling catheter for nasolacrimal duct recanalization, which comprises a catheter body, a first catheter and a second catheter, the first catheter is made of elastic materials, the inside of the first catheter is centered, the second catheter is positioned on one side of the first catheter, the second catheter is communicated with the outside through a one-way valve, and the other end of the second catheter is communicated with a liquid storage bag; the liquid storage bag is arranged in the catheter body, and the distance between the liquid storage bag and the outer wall of the catheter body is smaller than that between the liquid storage bag and the first catheter; the through groove is wound on the outer wall of the pipe body, the cross section of the through groove is circular, a functional strip made of a porous silica gel material is embedded in the through groove, and a sensor is further arranged in the functional strip; and two pull wires are provided. The pull wire penetrates through the nasolacrimal duct, the duct body is pulled to penetrate into the nasolacrimal duct, the duct body stays in the nasolacrimal duct, one end of the first duct is close to the lacrimal sac, the other end of the first duct is communicated with the nasal cavity, and tears are drained into the nasal cavity; the liquid storage bag expands after being filled with water and is clamped in the lacrimal sac, and the functional strip arranged in the through groove can slowly release medicine, collect data through the sensor and transmit the data to external equipment.

The invention provides a self-deviation-rectifying anti-moving oxygen inhalation device, and relates to the technical field of oxygen supply devices, the self-deviation-rectifying anti-moving oxygen inhalation device comprises an oxygen inhalation connector, an oxygen inhalation pipe and a nasal pipe; the oxygen delivery pipes are detachably arranged on the two sides of the oxygen inhalation connector; the adjusting assembly comprises an interval adjuster and a nasal cavity climbing assembly, the nasal cavity climbing assembly is arranged on one side of the interval adjuster in a sliding mode, the interval adjuster is detachably sleeved with the oxygen inhalation tube, and the nasal cavity climbing assembly is detachably sleeved with the nasal tube; the distance adjuster drives the oxygen inhalation tube to adjust the bending degree so as to adjust the nasal tube and the nasal cavity climbing assembly to move in the nares in the opposite directions at the same time, and when the nasal cavity climbing assembly makes contact with the inner walls of the nares, the corresponding centering state of the positions of the nasal tube and the nares can be obtained through adjustment. According to the oxygen inhalation device provided by the invention, the oxygen inhalation connector can be corrected and adjusted, so that the comfort in the oxygen inhalation process is ensured.

The utility model relates to the technical field of oxygen supply devices, and discloses a pulse oxygen supply device with a nasal suction connector provided with a reinforcing mechanism, which comprises an oxygen supply machine body, the output end of the oxygen supply machine body is communicated with a nasal oxygen tube, the nasal oxygen tube is provided with two branch tubes, the tail ends of the two branch tubes are jointly communicated with a nasal tube, and the nasal tube is provided with a reinforcing mechanism. The ends, deviating from the nasal tube, of the two branch tubes are jointly sleeved with a second auxiliary clip, the second auxiliary clip can be clamped on clothes, first auxiliary clips are clamped on the two branch tubes, and the first auxiliary clips are clamped on ears. The device solves the problems that after the device is worn for a long time, blood vessels behind the ears are pressed, and the clamping force is insufficient due to the ear shape; the pressure on ears is reduced while stable wearing is maintained, and the use comfort is improved.

The utility model discloses a mask for a respirator, relates to the field of respirator masks, solves the problems of poor air transmission effect, poor wearing stability and limited comfort level of the existing device, and adopts the following scheme that the mask comprises a mask part and a limiting part communicated with the mask part; the main body of the mask part is a mask shell sleeving the outer sides of the nose and the mouth of a user, the front side of the mask shell is fixedly connected with an air pipe and a nasal pipe at the output end of the air pipe, and the bottom side of the mask shell is provided with an exhaust groove hole communicated with outside air; according to the mask for the breathing machine, the two groups of nasal tubes are arranged in the mask part, the air supply effect of the mask can be guaranteed, the situation that the work of the breathing machine is affected by backflow of carbon dioxide exhaled by a patient can be avoided in cooperation with the arrangement that the mask part stretches into the nasal cavity of a user, and meanwhile the three groups of externally-expanded pull handles and bandages are arranged; the pulling effect of the three groups of outwards-expanding binding bands can be guaranteed, and the wearing stability is guaranteed.

1. The name of the design product: nasal tube. 2. The use of the design product: accessories for nebulizer. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model belongs to the technical field of medical instruments, and particularly relates to a lacrimal passage indwelling catheter for treating congenital nasolacrimal duct blockage, which comprises a hose, a marking belt is arranged in the middle of the hose, an air bag is arranged on each of two sides of the marking belt in the hose, a separation pad is arranged in each of the parts in the air bags in the hose, and an air bag is arranged in each separation pad. A through hole used for being communicated with the air bag is formed in the hose and located on the side, facing the marking belt, of the separation pad. After the hose is placed in the lacrimal passage of a child patient, a needle cylinder can penetrate through the silica gel pad located in the marking belt to inject liquid into the hose, after the liquid flows into the air bag, the air bag can be bulged, the effect of expanding the lacrimal passage is achieved, the outer wall of the air bag can be attached to the uneven inner wall in the lacrimal passage through expansion of the air bag, and therefore the effect of expanding the lacrimal passage is achieved. And compared with a traditional mode, knotting of the front end of the hose is not needed any more, and the discomfort of a child patient can be reduced.

The utility model relates to medical equipment, and discloses an anti-pressure sore nasal catheter, which comprises a nasal tube gas transmission mechanism, an ear-attaching buffer mechanism and a concave sliding mechanism, the nasal tube gas transmission mechanism is used for transmitting oxygen, and the ear-attaching buffer mechanism comprises a concave sliding mechanism which is used for being attached to the cheek and jawbone position of a patient. The concave sliding mechanism is used for coordinating the ear attaching buffering mechanism to move along the nasal tube air conveying mechanism, the nasal tube air conveying mechanism comprises a communicating hose used for pipe communication, the rear end of the communicating hose is provided with a contraction sleeve used for unified storage, and an adjusting cover used for tightening is arranged in the middle of the end of the contraction sleeve. Front and back oxygen conveying is achieved through the communicating hose and the telescopic sleeve, conveying of gas inserted into a nasal cavity imbedding pipeline is avoided, a device is directly manufactured at the position of a nasal catheter, air can be supplied to patients in a centralized mode, and specific assembly is achieved through the specific states of the nasal clip and the adjusting hasp.

The utility model discloses a lacrimal passage flushing demonstration model, and belongs to the technical field of medical teaching aids. The lacrimal passage flushing demonstration model comprises a lacrimal passage model plate and a lacrimal passage simulation pipeline arranged on the lacrimal passage model plate, wherein the lacrimal passage model plate is a plate body with a lacrimal passage pattern; the lacrimal passage simulation pipeline comprises an upper lacrimal passage simulation tube, a lower lacrimal passage simulation tube and a nasolacrimal duct simulation tube which are communicated through a three-way connector, catheter clamps are arranged on the upper lacrimal passage simulation tube, the lower lacrimal passage simulation tube and the nasolacrimal duct simulation tube, and the lacrimal passage simulation pipeline is fixed to the lacrimal passage model plate. And the upper lacrimal passage simulation tube, the lower lacrimal passage simulation tube and the nasolacrimal duct simulation tube are in one-to-one correspondence with the positions of the upper lacrimal passage, the lower lacrimal passage and the nasolacrimal duct in the lacrimal passage pattern on the lacrimal passage model plate. According to the utility model, the lacrimal passage simulation pipeline is arranged on the lacrimal passage model plate, and lacrimal passage flushing demonstration is carried out based on the lacrimal passage simulation pipeline, so that visual lacrimal passage flushing training is realized, and development of teaching work of new nurses or interns is facilitated.

FIELD: medical equipment.SUBSTANCE: kit for collecting biomaterial from the nasolacrimal duct. The kit for collecting biomaterial from the nasolacrimal duct contains a hollow probe and is equipped with a 100 mm long rod with a diameter of 0.7 mm and a tip for collecting biomaterial. The probe is 70 mm long, has a wall thickness of 0.1 mm, a diameter of 1.0 mm, and a funnel-shaped expansion at the entrance with a diameter of 10 mm. The probe is equipped with a graduated scale with a step of 1 mm. A mandrel with a length of 100 mm and a diameter of 0.8 mm is movably installed in the probe. The set is made of polylactide using a 3D printer.EFFECT: prevention of trauma to the lacrimal ducts, contamination of material during collection, possibility of obtaining contents for microbiological examination of the lacrimal ducts, and use in routine ophthalmological practice.1 cl, 1 dwg, 2 ex

The utility model relates to the technical field of medical instruments, in particular to an oxygen inhalation tube convenient to wear, which comprises a main breather tube and a nasal tube. The nasal tube is annular, the tail end of the nasal tube is communicated with the main breather tube, and a breathing head is arranged at the front end of the nasal tube; a connector is arranged at the tail end of the main breather pipe; and the nasal tube is provided with a decompression part corresponding to the ear part. The pressure reduction parts are arranged at the positions, corresponding to the ears, of the nasal tube, so that the pressure of the nasal tube on the ears during wearing can be effectively reduced, pressure sores caused by long-time wearing are avoided, and the wearing comfort of a patient is remarkably improved.

The invention discloses a nasal tube with two channels, and relates to the technical field of medical instruments, the nasal tube comprises a tube body, the two ends of the tube body are of opening structures, the opening structure at one end is connected with a first connector, the opening structure at the other end enters the stomach or small intestine along the esophagus after being inserted into the nasal cavity of a patient, and a liquid outlet area is arranged on the outer wall of the end, close to the first connector, of the tube body; an inner pipe is connected to the inner wall of the end, close to the first connector, of the pipe body, one end of the inner pipe extends out of the outer wall of the end, close to the first connector, of the pipe body and is connected with a second connector, the other end of the inner pipe is of a closed structure, and liquid outlet small holes communicated with one another are formed in the side of the closed structure and the surface wall of a liquid outlet area of the pipe body. And the space in the inner pipe and the space in the pipe body are mutually independent. Effective injection of pain relieving liquid medicine is achieved, direct operation through an injector does not need to be frequently used, the contact frequency of external instruments and the nasal cavity is reduced, the risk of nasal cavity infection is reduced, and health and safety of a patient are guaranteed.

The present application relates to medical image processing technology, a kind of tear duct segmentation and report intelligent writing method and system for lacrimal passage radiography CT.The present application takes CT image as input, first, identify the key area of tear duct and tear duct obstruction, and adopt multiple expert model according to the four angles of lacrimal sac, nasolacrimal duct, eyeball, nasal cavity, divided into multiple fields, finally, through text writing expert model, generate the report that conforms to professional specification.

The utility model discloses a child nasal oxygen cannula fixator which comprises a silica gel pressing strip, a hook-and-loop fastener strip, a hook-and-loop fastener short belt, a hook-and-loop fastener long belt, a sewing thread, a lower tightening belt, an upper tightening belt and a friction rib, a cannula clamping groove is formed in the middle of the surface of the silica gel pressing strip, and a main cannula body of a nasal cannula is clamped in the cannula clamping groove. The two ends of the nasal oxygen cannula body are communicated and connected with the nasal oxygen cannula body, the fixing device for fixing the nasal oxygen cannula body is arranged, the silica gel pressing strip serves as a main body part of the fixing device attached to the skin, and then the silica gel pressing strip can be tied to the afterbrain and the rear neck of a child in a splayed mode through the upper tying belt and the lower tying belt. The back face of the silica gel pressing strip makes contact with the skin of the child through the friction ribs to achieve anti-skid contact, the nasal insertion tube of the nasal oxygen cannula body can be tied to the surface of the silica gel pressing strip through the hook-and-loop fastener structure to be fixed, meanwhile, the nasal oxygen cannula body can be wound out of a tying belt from the position behind the ears of the child, and it is guaranteed that the nasal oxygen cannula body can be stably tied to the face of the child for use.

The invention relates to the technical field of medical teaching appliances, in particular to a lacrimal passage irrigation teaching model, which comprises an eye model, and is characterized in that the eye model is provided with a lacrimal duct and a nasolacrimal duct; the on-off mechanism is arranged on the lacrimal duct and used for controlling the lacrimal duct to be in a connected or blocked state; the adjusting mechanism comprises an annular shell arranged on the lower side of the nasolacrimal duct, an elastic rubber barrel communicated with a nasolacrimal duct channel is installed in the middle of the annular shell, a plurality of elastic pieces distributed circumferentially are installed at the bottom of the annular shell, and the upper ends of the elastic pieces are obliquely arranged towards the axis of the elastic rubber barrel. A sliding ring used for pushing the elastic pieces to move is longitudinally installed in the annular shell in a sliding mode. The teaching model can simulate common conditions in a lacrimal passage flushing process, namely lacrimal passage smoothness, lacrimal ductule blockage, lacrimal duct blockage and nasolacrimal duct stenosis, and can adjust the stenosis of the nasolacrimal duct, so that students can comprehensively know various conditions of lacrimal passage flushing.

The utility model relates to the technical field of medical teaching instruments, and particularly discloses a lacrimal passage model teaching aid which comprises a base, a rotating seat rotationally arranged at the top end of the base and a light-transmitting plate arranged on one side of the top end of the rotating seat. The lacrimal passage structure is arranged on the outer side of the light-transmitting plate and is used for simulating a lacrimal passage flushing state; the lacrimal passage structure comprises an upper lacrimal ductule, a lower lacrimal ductule arranged on the lower right portion of the upper lacrimal ductule and a nasolacrimal duct arranged on the right portion of the lower lacrimal ductule, and the upper lacrimal ductule, the lower lacrimal ductule and the nasolacrimal duct are communicated with one another. The adjusting structure is arranged on one side of the light-transmitting plate at the top end of the rotating seat, and the adjusting structure is used for extruding the lacrimal passage structure to block fluid passing through the lacrimal passage structure. Through the arrangement of the lacrimal passage structure and the adjusting structure, a teacher can conveniently simulate various states of lacrimal passage flushing so as to improve the learning effect of students; and through the arranged clamping structure, manpower can be saved, and the teaching aid can be better operated in teaching.