Nasogastric tube with recognition function

Abstract

The invention belongs to the field of medical equipment, and particularly relates to a nasogastric tube with a recognition function, which comprises a stomach tube main body, an elliptical end module, an auxiliary module and a pressing module, a tube end is fixed at one end of the stomach tube main body, a guide wire main body is arranged on the inner wall of the stomach tube main body, and the elliptical end module is used for assisting medical personnel to judge whether the stomach tube is placed into the stomach or not. When the temporomandibular joint is locked or masseter reflex is increased, the auxiliary module helps medical staff expand the mouth opening degree, the pressing module enables the stomach tube body and the guide wire body to be cooperatively fixed through pressure, and the guide wire is prevented from accidentally slipping when passing through the narrow area of the throat. The method solves the problems that time is wasted due to the fact that two or more methods are usually selected for recognizing whether the stomach tube is in the stomach or not in a conventional method, the stomach tube cannot be determined to be in the stomach for a stroke swallowing dysfunction patient through three methods, if gastric juice cannot be extracted, hydrops possibly exist in the lung of the patient, the reaction of the patient is low due to injection of 10 ml of warm water, and whether the stomach tube is in the stomach or not is difficult to recognize.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and particularly relates to a nasogastric tube with an identification function. Background Art

[0002] Patients with stroke and dysphagia often have dysarthria. According to the degree of dysphagia, a gastric tube needs to be inserted to ensure nutritional supply. Due to the reduction of swallowing disorder and communication ability, they cannot cooperate well during the insertion of the gastric tube. Especially when the gastric tube is inserted into the pharynx, they cannot cooperate with the nurse to do swallowing movements, and the gastric tube is easily misinserted into the trachea and inserted into the lungs. Due to the reduced reaction ability of the patient, even if the gastric tube is misinserted into the lungs and food is injected, the patient's coughing and other reactions will not be very strong, which may cause serious events such as infection and even death.

[0003] In the prior art, there are 3 methods introduced in textbooks for routinely judging whether the gastric tube is in the stomach: aspirating gastric juice, injecting gas to listen for the sound of water passing through, and injecting 10 ml of liquid into the gastric tube to observe the patient's reaction. Usually, more than 2 methods are selected for identification, which not only wastes time, but also cannot determine whether the gastric tube is in the stomach for patients with stroke and dysphagia using these 3 methods. For example, gastric juice cannot be aspirated; even if the gastric tube is inserted into the lungs, due to the possible presence of fluid in the patient's lungs due to the condition, the sound of water passing through can also be heard; when injecting 10 ml of warm water, due to the poor overall reaction of the patient, there will be no reaction, so it is very difficult to identify whether the gastric tube is in the stomach. Summary of the Invention

[0004] To solve the above problems existing in the prior art, the present invention provides a nasogastric tube with an identification function, aiming to solve the complex situation that the conventional methods for judging whether the gastric tube is in the stomach in the prior art are not applicable to patients with stroke and dysphagia. Due to the reduction of swallowing disorder and communication ability in patients with stroke and dysphagia, they can hardly cooperate during the insertion of the gastric tube. Therefore, it is difficult for medical staff to judge whether the gastric tube has been misinserted into the trachea, greatly increasing the possibility of infection and even death.

[0005] To achieve the above object, the present invention provides the following technical solution: A nasogastric tube with an identification function, which is applicable for medical staff to quickly determine whether the gastric tube is in the stomach when inserting the gastric tube into a patient with stroke and dysphagia. The nasogastric tube with an identification function includes a gastric tube main body, an elliptical end module, an auxiliary module, and a pressing module. One end of the gastric tube main body is fixed with a tube end head, and a guide wire main body is provided on the inner wall of the gastric tube main body;

[0006] The elliptical end module is used to assist medical staff in judging whether the gastric tube has been inserted into the stomach. The auxiliary module helps medical staff expand the oral opening degree when the temporomandibular joint is locked or the masseter reflex is hyperactive. The pressing module fixes the gastric tube main body and the guide wire main body in cooperation through pressure to prevent the guide wire from accidentally slipping when passing through the narrow area of the pharynx;

[0007] One end of the guide wire body is fixed with an elliptical end module. The elliptical end module at least includes a fixed elliptical end. One end of the fixed elliptical end is fixed to one end of the guide wire body. One end of the circumferential surface of the fixed elliptical end is fixed with a hidden shaft. A rotating elliptical end is rotatably connected to the circumferential surface of the hidden shaft. One end of the inner wall of the rotating elliptical end is fixed with a heteropolar magnet. A V-shaped electromagnet is fixed to the inner wall of the rotating elliptical end. The V-shaped electromagnet is powered by a super capacitor. The super capacitor is fixed to the inner wall of the rotating elliptical end. A signal receiver is provided on the inner wall of the rotating elliptical end. A charging contact is fixed to the circumferential surface of the rotating elliptical end. The charging contact is electrically connected to the super capacitor. A sealing cover is nested on the surface of the rotating elliptical end. A base inner block is fixed to the bottom of the fixed elliptical end. Elastic pressing hooks are fixed to both sides of the base inner block. A base pressing plate is fixed to the bottom of the base inner block. A measuring test paper is fixed under pressure at one end of the elastic pressing hook;

[0008] In the prior art, in clinical practice, for the key operation of judging whether the gastric tube is accurately placed in the stomach, three commonly used methods are mainly described in conventional textbooks, namely, the gastric juice extraction method, the method of injecting gas and listening for the sound of water passing through, and the method of injecting 10 ml of liquid into the gastric tube and observing the patient's reaction. In actual clinical operations, to ensure the accuracy of the judgment results, usually two or more of these methods need to be selected for comprehensive identification. However, this conventional operation method has certain limitations in practical applications, especially when facing special patient groups such as stroke patients with swallowing dysfunction. The problems are more prominent. First, for the gastric juice extraction method, due to the serious impact on the physiological functions of stroke patients with swallowing dysfunction, their gastrointestinal peristalsis function often weakens or even becomes disordered, resulting in difficulty in smoothly extracting gastric juice during actual operations, and thus unable to accurately judge the position of the gastric tube through this method. Second, the method of injecting gas and listening for the sound of water passing through also has uncertainties. Even when the gastric tube is misinserted into the lung, given the complex condition of stroke patients with swallowing dysfunction themselves, there may be abnormal conditions such as fluid accumulation in the lungs. When injecting gas, due to the presence of fluid in the lungs, the sound of water passing through may also be heard, which makes the method of judging the position of the gastric tube by listening for the sound of water passing through lose its reliability. Finally, the application of the method of injecting 10 ml of liquid into the gastric tube and observing the patient's reaction also faces challenges in such patients. Due to the generally poor overall response ability of stroke patients with swallowing dysfunction, the body's perception and feedback mechanisms to external stimuli are damaged to varying degrees. When injecting 10 ml of warm water into the gastric tube, the patient may not show obvious reactions, and it is difficult for clinical medical staff to accurately judge whether the gastric tube is in the stomach based on the patient's reactions;

[0009] In the present invention, when the staff needs to implant the gastric tube body into the stomach of a stroke swallowing dysfunction patient, the staff places the guide wire body inside the gastric tube body, and then implants it to prevent the tube from bending and deforming when passing through the three physiological strictures of the esophagus, the cricopharyngeal part, the aortic arch, and the diaphragmatic hiatus. After the medical staff completes the implantation and the gastric tube is inserted to a suitable length, the guide wire is further pushed forward to make it contact with the gastric mucosa. The elliptical end module at the front end of the guide wire is elliptical to avoid damaging the gastric mucosa. At the same time, a control device is used to send an instruction to a signal receiver to discharge the supercapacitor. The capacitor has a supporting circuit including a basic charging and discharging circuit, an anti-overcharging protection circuit, a protection circuit, a signal controller circuit, etc., so that the V-shaped electromagnet is energized to generate magnetism. Due to the two The V-shaped electromagnets on the sides are relatively polar with the same poles, generating repulsion. The repulsive force pushes the ellipsoid end to separate on both sides with the hidden axis as the axis, so that the test paper inside the ellipsoid end leaks out and contacts the gastric mucosa. After waiting for 10 seconds, the guide wire is pulled out. If the test paper at the front end changes color, it can be judged that the gastric tube is in the stomach. If it does not change color, it may have entered the trachea by mistake. After use, the medical staff only needs to pry open the sealing cover and use an external charging device to contact the charging contacts to recharge the supercapacitor, and then re-embed the sealing cover into the ellipsoid end, pull out the used test paper, pry open the elastic pressure hook and place the new test paper on both sides of the base pressure plate. After letting go, the elastic pressure hook recovers, fixes the test paper by pressure, and places multiple test papers to prevent misjudgment. At the same time, the inner wall of the ellipsoid end has a sealing rubber ring;

[0010] Through this mechanism, it can be effectively determined whether the gastric tube is in the stomach. This elliptical end module presents an elliptical shape, and a test paper is installed on this module. This test paper has a high sensitivity to gastric juice. When the gastric tube smoothly enters the stomach, the gastric juice will come into contact with the test paper. At this time, the test paper will quickly change color. By virtue of this significant color change, medical staff can clearly and accurately determine whether the gastric tube is in the stomach, greatly improving the accuracy and reliability of the determination. The elliptical end module at the front end of the guide wire is also equipped with a rotating elliptical end. In the unused state, the rotating elliptical end relies on the adsorption force generated by the heteropolar magnet to keep it always in a closed state. This design cleverly avoids the interference of external factors on the internal test paper and ensures that the test paper remains in its original state in the non-detection state. During the actual medical operation process, the remote control device equipped by medical staff cooperates with the signal receiver on the inner wall of the rotating elliptical end. When it is necessary to judge the position of the gastric tube, medical staff only need to send corresponding instructions through the remote control device. After receiving the instructions, the signal receiver will make the capacitor discharge to activate the electromagnet, so that the rotating elliptical end opens smoothly. At this time, the gastric juice can come into full contact with the test paper to conduct accurate detection. This design preferably prevents a series of misjudgment situations that occur during the implantation of the gastric tube. For example, when the patient has reactions such as nausea and vomiting due to physical discomfort, the gastric contents will come into contact with the test paper in advance due to the body's stress response. Without the protection of the rotating elliptical end and the precise control of the remote control device, the premature contact between the gastric contents and the test paper will cause the test paper to change color, and then make medical staff make a wrong judgment that the gastric tube is already in the stomach. Through the ingenious design and coordinated working mechanism of this mechanism, such misjudgment situations are effectively avoided, providing a strong guarantee for the safety and accuracy of medical operations.

[0011] Furthermore, the auxiliary module at least includes a cross base. A driving threaded disc is rotatably connected to the top of the cross base. A fixed cylinder column is fixed to the bottom of the cross base. A ladder limit groove is formed on the circumferential surface of the fixed cylinder column. Sliding grooves are formed on both sides of the cross base. A limiting sliding block is slidably connected to the inner wall of the sliding groove. An upper limit plate is fixed to the top of the limiting sliding block. A rotating long connecting rod is fixed to the bottom of the limiting sliding block. Rotating short connecting rods are rotatably connected to both sides of the rotating long connecting rod. One end of the rotating short connecting rod is rotatably connected to a circumferential shaft plate. A pushing bottom cylinder is fixed to one side of the circumferential shaft plate. A ladder sliding member is fixed to the inner wall of the pushing bottom cylinder. The surface of the ladder sliding member is slidably connected to the inner wall of the ladder limit groove. A pushing bottom plate is fixed to the bottom of the pushing bottom cylinder. A driven threaded column is fixed to the top of the pushing bottom plate. The threaded groove of the driven threaded column is threadedly connected to the threaded groove of the driving threaded disc. A chewing gum is rotatably connected to one side of the rotating long connecting rod;

[0012] In the existing technology, in the clinical management of stroke patients, oral gastric tube insertion often faces significant operational challenges, especially in patients with concomitant impaired consciousness (GCS score ≤ 8 points). Such patients often show a forced closure of the mandibular joint due to tonic contraction of the masticatory muscles and hyperreflexia caused by central nervous system damage, making conventional tube insertion difficult to implement. The locking phenomenon of the temporomandibular joint causes the oral opening to be less than 1.5 cm, which cannot meet the 2.5 cm operating space required for standard gastric tube insertion. Patients with brainstem injuries are prone to hyperreflexia of the masseter muscles and are at risk of misbiting the catheter (incidence rate is about 28%-35%). Repeated operation attempts can induce increased intracranial pressure (studies have shown that operation time > 3 minutes can increase ICP). At the same time, the use of traditional mouth openers leads to a tooth enamel damage rate as high as 17%, and the use of sedatives can easily aggravate consciousness suppression.

[0013] In the present invention, when a stroke patient needs to have a gastric tube implanted, the medical staff will open the patient's mandible, which is in a state of forced mandibular joint closure, to about 1.5 cm, and then insert the auxiliary module into the patient's mouth, so that the patient's teeth bite the chewing gum, which supports the bite and prevents damage to the patient's teeth. Then, the active threaded dial is rotated, and the driven threaded column moves upward due to the restriction of the threaded connection and the charging contact and the ladder slide, and the push bottom plate and the push bottom cylinder are pulled to move upward, so that the short-spinning connecting rod rotates to push the long-spinning connecting rod. Due to the matching restriction of the sliding groove and the limited sliding moment block, the long-spinning connecting rod moves away from both ends. Since the chewing gum and the long-spinning connecting rod have a certain angle of rotation space, when the long-spinning connecting rod moves away, the angle between the chewing gum and the long-spinning connecting rod also changes continuously, thereby conforming to the arc change of the human mouth, so that the patient's mandible is gradually expanded, and the 2.5 cm operating space required for the standard gastric tube insertion is met. Then, the medical staff inserts the gastric tube body through the hollow in the middle of the driven threaded column, and then implants it into the patient's stomach.

[0014] This mechanism has demonstrated excellent design concepts and practical value in medical practice. Its unique structure enables medical staff to create favorable conditions for subsequent gastric tube insertion operations quickly and stably with the help of this mechanism when facing the special group of stroke patients, even if the patient's mandibular joint is in a forced closed state due to the disease. Specifically, it can efficiently cause the patient's oral cavity to expand to the 2.5cm operating space strictly required for standard gastric tube insertion, effectively solving the operational difficulties caused by the limited opening and closing of the patient's mouth. In actual clinical scenarios, whether it is busy periods with tight manpower or emergency situations where the condition is critical and urgent, this mechanism can play a key role, and even the preparation for gastric tube insertion can be completed by a single person independently, greatly improving the emergency response capability, fully meeting the urgent need for efficient and convenient medical equipment for emergency treatment, and providing strong technical support and operational guarantees for the emergency treatment of stroke patients and other patients with similar conditions, significantly optimizing the quality and efficiency of medical services.

[0015] Furthermore, the clamping module at least includes a fixed hollow disk, the bottom of which is fixed to the top of the driven threaded column, a plurality of positioning grooves are provided on the top of the fixed hollow disk, a rotating wheel groove is provided on the inner wall of the fixed hollow disk, a wheel shaft column is rotatably connected to the inner wall of the rotating wheel groove, a clamping eccentric wheel is fixed to the circumference of the wheel shaft column, a pull-out side handle is fixed to the circumference of the clamping eccentric wheel, and a positioning point is fixed to the top of the clamping eccentric wheel;

[0016] In the prior art, the relative sliding coefficient between the guide wire and the gastric tube is 0.3-0.5 (polyethylene material interface). When passing through the narrow area of ​​the throat (average diameter 1.5 cm), the catheter may retract due to tissue resistance (average retraction force 3.6N), resulting in an unexpected slip rate of the guide wire during the catheterization process. When passing through the three physiological narrow areas of the esophagus (crinopharyngeal region, aortic arch, diaphragmatic hiatus), the catheter is prone to buckling and deformation. The unfixed guide wire end may break through the side hole at the end of the gastric tube due to the operating thrust (average 4.2N), causing the guide wire tip to enter the bronchus by mistake, causing medical accidents.

[0017] In the present invention, medical personnel often need the guide wire body for assistance when implanting the gastric tube body, and the relative position between the two needs to be kept stable as much as possible, and the tip of the guide wire body should always be at a safe distance of 2-3 cm from the end of the gastric tube. Before and after the staff uses the auxiliary module to expand the patient's lower jaw, they can first pass the gastric tube body through the fixed hollow disk, and then insert the guide wire body into the gastric tube body. After determining the position, the medical staff rotates the compression eccentric wheel inward by pulling the side handle to squeeze the gastric tube body and the guide wire body, and the positioning point and the positioning groove are nested to fix the position of the compression eccentric wheel, so that the compression eccentric wheel fixes the relative position of the two by pressure, and then implants the gastric tube into the patient, thereby better ensuring its stability during use;

[0018] Through this mechanism, a guide wire (usually with a hardness grade of 0.035 inches / 460 kPa) can form a rigid coupling with a gastric tube (hardness 180 - 220 kPa), avoiding catheter buckling and deformation when passing through the three physiological strictures of the esophagus (cricopharyngeal part, aortic arch, esophageal hiatus). Fixing the relative position between the two can increase the bending modulus of the combination by 40%, reducing the catheterization failure rate. The fixation can limit the advancing distance of the guide wire, ensuring a safe distance of 2 - 3 cm from the tip to the end of the gastric tube at all times (meeting the EN 1615 standard). When rotating the catheter (such as a 15° - 30° rotation is required when passing through the cardia), the fixation increases the torque transmission efficiency from 58% to 92%, reducing the fatigue of the operator's hand. The rigid complex formed after fixation allows the operator to more clearly perceive the catheter tip passing through anatomical landmarks (such as the "falling feeling" when the cricopharyngeal muscle opens), improving the positioning accuracy (ultrasound verification shows that the error is reduced from ±3.2 cm to ±1.1 cm). For patients with neck rigidity (such as increased muscle tone after stroke), fixing the guide wire can maintain the preset bending angle of the gastric tube (such as a reverse "C" shape), avoiding coiling in the piriform recess and greatly increasing the stability and safety during product use.

[0019] Furthermore, a rectangular groove is provided at the top of the cross base, a spring piece is fixed to the inner wall of the rectangular groove, a nested ball is fixed to one end of the spring piece, and spherical grooves are circumferentially arranged at the bottom of the active thread turntable, and the inner wall of the spherical groove is nested with the surface of the nested ball;

[0020] In the prior art, the active thread turntable plays a crucial role in medical operations, especially when patients undergo delicate medical procedures such as gastric tube implantation. However, it is found in actual operations that after the active thread turntable rotates and the medical staff releases their hands, due to some design defects or mechanical structural deficiencies, it often tends to reverse. This uncontrolled reverse force directly acts on the driven thread post tightly connected to it, causing the driven thread post to unexpectedly descend. This descending behavior seriously weakens the dilation effect achieved previously by rotating the active thread turntable, making the dilation of the patient's mouth unstable and unreliable. For medical staff, when they try to implant a gastric tube, this unstable dilation state greatly increases the operation difficulty, and may even lead to medical accidents due to insufficient dilation or sudden changes, bringing unnecessary pain and risks to patients, and seriously affecting the safety and effectiveness of medical operations;

[0021] In the present invention, when medical staff rotate the active threaded disk, its bottom continuously squeezes the nested ball to accumulate elastic potential energy in the spring piece. When the spherical groove reaches the nested ball, the spring piece releases the elastic potential energy and embeds into the spherical groove at the bottom of the active threaded disk, enabling the active threaded disk to maintain a set position when the medical staff releases their hand. The design of this mechanism fully considers the problems that medical staff may encounter during use. By positioning the nested ball and the spherical groove to limit its possible rotation, the stability during equipment use is greatly increased, improving the equipment stability.

[0022] Furthermore, perforations are provided on the surface of the pull side handle, a suspension rope is provided on the inner wall of the perforation, and an information label is provided on the peripheral surface of the suspension rope;

[0023] In the prior art, during busy medical operations, medical staff often need to wear gloves to maintain the aseptic state of the operation environment. Although this practice is necessary, it brings a significant operational obstacle. Specifically, when medical staff attempt to pull the pull side handle to adjust the position or angle of the equipment, due to the isolation effect of the gloves, the friction between the hand and the side handle is greatly reduced, often resulting in the side handle slipping out of the hand. This frequent slipping phenomenon seriously disrupts the smoothness of the operation, making the already tense medical work rhythm slower and less efficient, increasing the operation difficulty and psychological burden of medical staff. To effectively address this challenge, the present invention ingeniously introduces the innovative design of the suspension rope. By installing the suspension rope at a specific position of the equipment, medical staff can use the suspension rope as an auxiliary lever during operation to pull the pull side handle in a more stable and labor-saving manner. This design not only significantly enhances the stability of the operation but also greatly improves the work efficiency, enabling medical staff to focus more on the medical operation itself.

[0024] Furthermore, control handles are fixed at both ends of the cross base. In the present invention, it is more convenient for medical staff to hold the cross base assembly through the control handles, thus facilitating single-person operation by medical staff. Friction-increasing ladder members are circumferentially and arrayedly fixed at the top of the active threaded disk. In the present invention, the contact area with the fingers of medical staff is greatly increased through the friction-increasing ladder members, providing a force application position for medical staff, thereby greatly increasing the convenience of rotating the active threaded disk, being able to greatly save the effort required by medical staff, and improving the user experience. A rubber pad is fixed at the bottom of the ladder sliding member. In the present invention, the collision between the ladder sliding member and both ends of the inner wall of the ladder limit groove is reduced through the rubber pad, reducing the wear between components and improving the service life of the equipment.

[0025] Furthermore, an inclined groove is provided in the pull side handle. In the present invention, the pull side handle conforms more to the shape of human finger pinching through the inclined groove, while reducing production materials and lowering production costs. Anti-slip grooves are provided on the peripheral surface of the pressing eccentric wheel, further increasing the friction with the components and the pressure fixing effect at the same time.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. In the present invention, when the staff needs to implant the gastric tube body into the stomach of a stroke swallowing dysfunction patient, the staff places the guide wire body inside the gastric tube body, and then implants it to prevent the tube from bending and deforming when passing through the three physiological stenosis of the esophagus. After the medical staff completes the implantation and the gastric tube is inserted to a suitable length, the guide wire is further pushed forward to make it contact with the gastric mucosa. The elliptical end module at the front end of the guide wire is elliptical to avoid damaging the gastric mucosa. At the same time, a control device is used to send a command to a signal receiver to discharge the supercapacitor and energize the V-shaped electromagnet to generate magnetism. Since the V-shaped electromagnets on both sides are relatively polar and have the same polarity, they repel each other and expel the gastric mucosa. The repulsive force pushes the ellipsoidal end to separate on both sides with the hidden axis as the axis, so that the test paper inside the ellipsoidal end leaks out and contacts the gastric mucosa. After waiting for 10 seconds, the guide wire is pulled out. If the test paper at the front end changes color, it can be judged that the gastric tube is in the stomach. If it does not change color, it may be mistakenly inserted into the trachea. After use, the medical staff only needs to pry open the sealing cover and use an external charging device to contact the charging contacts to recharge the supercapacitor, then re-embed the sealing cover into the ellipsoidal end, pull out the used test paper, pry open the elastic pressure hook and place the new test paper on both sides of the base pressure plate. After releasing the hand, the elastic pressure hook recovers, fixes the test paper by pressure, and places multiple test papers to prevent misjudgment.

[0028] Through this mechanism, it can be effectively determined whether the gastric tube is in the stomach. This elliptical end module presents an elliptical shape, and a test paper is installed on this module. This test paper is highly sensitive to gastric juice. When the gastric tube smoothly enters the stomach, the gastric juice will come into contact with the test paper. At this time, the test paper will quickly change color. By virtue of this significant color change, medical staff can clearly and accurately determine whether the gastric tube is in the stomach, greatly improving the accuracy and reliability of the determination. The elliptical end module at the front end of the guide wire is also equipped with a rotating elliptical end. In the unused state, the rotating elliptical end relies on the adsorption force generated by the heteropolar magnet to keep it in a closed state all the time. This design cleverly avoids the interference of external factors on the internal test paper and ensures that the test paper remains in its original state in the non-detection state. During the actual medical operation process, the remote control device equipped by medical staff cooperates with the signal receiver on the inner wall of the rotating elliptical end. When it is necessary to judge the position of the gastric tube, medical staff only need to send corresponding instructions through the remote control device. After receiving the instructions, the signal receiver will discharge the capacitor to activate the electromagnet, so that the rotating elliptical end opens smoothly. At this time, the gastric juice can come into full contact with the test paper to conduct accurate detection. This design better prevents a series of misjudgment situations that occur during the implantation of the gastric tube. For example, when a patient has nausea, vomiting and other reactions due to physical discomfort, the gastric contents will come into contact with the test paper in advance due to the body's stress response. Without the protection of the rotating elliptical end and the precise control of the remote control device, the premature contact between the gastric contents and the test paper will cause the test paper to change color, and then make medical staff make a wrong judgment that the gastric tube has been in the stomach. Through the ingenious design and collaborative working mechanism of this mechanism, such misjudgment situations are effectively avoided, providing a strong guarantee for the safety and accuracy of medical operations.

[0029] 2. In the prior art, in the clinical management of stroke patients, the transoral gastric tube insertion often faces significant operation challenges, especially in the patient group with concomitant disturbance of consciousness. Due to the tonic contraction of the masticatory muscles and hyperactive pharyngeal reflex caused by central nervous system injury in such patients, they often show a state of forced closure of the mandibular joint, resulting in difficulties in performing conventional catheterization operations. The phenomenon of temporomandibular joint lock leads to an oral opening degree < 1.5 cm, which cannot meet the 2.5 cm operation space required for standard gastric tube insertion. Brainstem injury patients are prone to hyperactive masseter reflex and there is a risk of accidental biting of the catheter. Repeated operation attempts can induce increased intracranial pressure. At the same time, the application of traditional mouth openers results in an enamel injury rate as high as 17%. The use of sedative drugs is likely to exacerbate consciousness inhibition;

[0030] In the present invention, when a stroke patient needs to have a gastric tube implanted, the medical staff will open the patient's mandible, which is in a state of forced mandibular joint closure, to about 1.5 cm, and then insert the auxiliary module into the patient's mouth, so that the patient's teeth bite the chewing gum, which supports the bite and prevents damage to the patient's teeth. Then, the active threaded dial is rotated, and the driven threaded column moves upward due to the restriction of the threaded connection and the charging contact and the ladder slide, and the push bottom plate and the push bottom cylinder are pulled to move upward, so that the short-spinning connecting rod rotates to push the long-spinning connecting rod. Due to the matching restriction of the sliding groove and the limited sliding moment block, the long-spinning connecting rod moves away from both ends. Since the chewing gum and the long-spinning connecting rod have a certain angle of rotation space, when the long-spinning connecting rod moves away, the angle between the chewing gum and the long-spinning connecting rod also changes continuously, thereby conforming to the arc change of the human mouth, so that the patient's mandible is gradually expanded, and the 2.5 cm operating space required for the standard gastric tube insertion is met. Then, the medical staff inserts the gastric tube body through the hollow in the middle of the driven threaded column, and then implants it into the patient's stomach.

[0031] This mechanism has demonstrated excellent design concepts and practical value in medical practice. Its unique structure enables medical staff to create favorable conditions for subsequent gastric tube insertion operations quickly and stably with the help of this mechanism when facing the special group of stroke patients, even if the patient's mandibular joint is in a forced closed state due to the disease. Specifically, it can efficiently cause the patient's oral cavity to expand to the 2.5cm operating space strictly required for standard gastric tube insertion, effectively solving the operational difficulties caused by the limited opening and closing of the patient's mouth. In actual clinical scenarios, whether it is busy periods with tight manpower or emergency situations where the condition is critical and urgent, this mechanism can play a key role, and even the preparation for gastric tube insertion can be completed by a single person independently, greatly improving the emergency response capability, fully meeting the urgent need for efficient and convenient medical equipment for emergency treatment, and providing strong technical support and operational guarantees for the emergency treatment of stroke patients and other patients with similar conditions, significantly optimizing the quality and efficiency of medical services.

[0032] 3. In the prior art, the relative sliding coefficient between the guide wire and the gastric tube is 0.3-0.5. When passing through the narrow area of ​​the throat, the catheter may retract due to tissue resistance, resulting in an unexpected slip rate of the guide wire during the catheterization process. When passing through the three physiological narrows of the esophagus, the catheter is prone to buckling and deformation. The unfixed end of the guide wire may break through the side hole at the end of the gastric tube due to the operating thrust, causing the tip of the guide wire to enter the bronchus by mistake, causing medical accidents;

[0033] In the present invention, medical staff often need a guide wire body to assist when implanting the gastric tube body. The relative positions of the two need to be kept stable as much as possible. The tip of the guide wire body should always be at a safe distance of 2-3 cm from the end of the gastric tube. Before and after the staff use the auxiliary module to expand the patient's mandible, the gastric tube body can be passed through the fixed hollow disk first, and then the guide wire body is placed inside the gastric tube body. After determining the position, the medical staff rotate the pressing eccentric wheel inward by pulling the side handle, so that the pressing eccentric wheel presses the gastric tube body and the guide wire body. The positioning point and the positioning groove are nested to fix the position of the pressing eccentric wheel, so that the pressing eccentric wheel fixes the relative positions of the two through pressure. Then the gastric tube is implanted into the patient, thus better ensuring the stability during use;

[0034] Through this mechanism, the guide wire can form a rigid coupling with the gastric tube, avoiding catheter buckling and deformation when passing through the three physiological strictures of the esophagus. Fixing the relative positions between the two can increase the bending modulus of the combination by 40%, reduce the catheterization failure rate. The fixation can limit the advancing distance of the guide wire, ensuring that the tip is always at a safe distance of 2-3 cm from the end of the gastric tube. When rotating the catheter for insertion, the fixation increases the torque transmission efficiency from 58% to 92%, reducing the fatigue of the operator's hand. The rigid complex formed after fixation enables the operator to more clearly perceive the catheter tip passing through the anatomical landmarks, improving the positioning accuracy. For patients with neck rigidity, fixing the guide wire can maintain the preset bending angle of the gastric tube and avoid coiling in the piriform recess, greatly increasing the stability and safety of the product during use.

[0035] 4. In the prior art, the active threaded disc plays a crucial role during medical operations, especially during delicate medical procedures such as gastric tube implantation for patients. However, in actual operation, it is found that after the active threaded disc finishes rotating, if the medical staff releases their hand, due to certain design defects or deficiencies in the mechanical structure, it often tends to reverse. This uncontrolled reverse force directly acts on the driven threaded column connected to it tightly, resulting in the unexpected descent of the driven threaded column. This descent behavior seriously weakens the expansion effect achieved previously by rotating the active threaded disc, making the expansion of the patient's mouth unstable and unreliable. For medical staff, when they attempt to implant a gastric tube, this unstable expansion state greatly increases the operation difficulty and may even lead to medical accidents due to insufficient expansion or sudden changes, bringing unnecessary pain and risks to the patient and seriously affecting the safety and effectiveness of medical operations. In the present invention, when the medical staff rotates the active threaded disc, its bottom continuously squeezes the nested ball to accumulate elastic potential energy in the spring piece. When the spherical groove reaches the nested ball, the spring piece releases the elastic potential energy and embeds into the spherical groove at the bottom of the active threaded disc, enabling the active threaded disc to maintain its established position when the medical staff releases their hand. The design of this mechanism fully considers the problems that medical staff may encounter during use. By positioning the nested ball and the spherical groove to limit its possible rotation, the stability during equipment use is greatly increased, improving the equipment stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0037] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0038] Figure 2 is a three-dimensional structural schematic diagram of the rotating ellipsoidal end in the present invention;

[0039] Figure 3 is a three-dimensional structural schematic diagram of the fixed ellipsoidal end in the present invention;

[0040] Figure 4 is a three-dimensional structural schematic diagram of the V-shaped electromagnet in the present invention;

[0041] Figure 5 is a three-dimensional structural schematic diagram of the cross base in the present invention;

[0042] Figure 6 is a three-dimensional structural schematic diagram of the push bottom cylinder in the present invention;

[0043] Figure 7 is a three-dimensional structural schematic diagram of the rotating short connecting rod in the present invention;

[0044] Figure 8 This is a three-dimensional structural schematic diagram of the push chassis in the present invention;

[0045] Figure 9 This is a three-dimensional structural schematic diagram of the nested ball in the present invention;

[0046] Figure 10 This is a three-dimensional structural schematic diagram of the fixed hollow disk in the present invention;

[0047] Figure 11 This is a three-dimensional structural schematic diagram of the pressing eccentric wheel in the present invention.

[0048] Legend:

[0049] 1. Gastric tube main body; 101. Tube end; 102. Guide wire main body;

[0050] 2. Elliptical end module; 201. Fixed elliptical end; 202. Hidden shaft; 203. Rotating elliptical end; 204. Heteropolar magnet; 205. V-shaped electromagnet; 206. Charging contact; 207. Sealing cover; 208. Inner base block; 209. Elastic pressing hook; 2010. Base pressing plate; 2011. Detection test paper;

[0051] 3. Auxiliary module; 301. Cross base; 302. Sliding groove; 303. Limited slip moment block; 304. Upper limit plate; 305. Fixed cylinder column; 306. Ladder limit groove; 307. Ladder sliding part; 308. Push bottom cylinder; 309. Peripheral shaft plate; 3010. Rotating short connecting rod; 3011. Rotating long connecting rod; 3012. Push chassis; 3013. Driven threaded column; 3014. Active threaded rotary disk; 3015. Bite gum;

[0052] 4. Pressing module; 401. Fixed hollow disk; 402. Rotating wheel groove; 403. Positioning groove; 404. Wheel shaft column; 405. Pressing eccentric wheel; 406. Pulling side handle; 407. Positioning point;

[0053] 5. Suspension rope; 501. Information label; 6. Control handle; 7. Friction increasing ladder part; 8. Spring piece; 801. Nested ball. Specific embodiments

[0054] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0055] Embodiment 1:

[0056] Please refer to Figures 1-4The present embodiment provides the following technical solutions: a nasogastric tube with an identification function, which is suitable for a patient with cerebral stroke swallowing dysfunction to insert a gastric tube, so that medical personnel can quickly determine whether the gastric tube is in the stomach. The nasogastric tube with an identification function includes a gastric tube body 1, an elliptical end module 2, an auxiliary module 3 and a clamping module 4. A tube end 101 is fixed at one end of the gastric tube body 1, and a guide wire body 102 is provided on the inner wall of the gastric tube body 1. The elliptical end module 2 is used to assist medical personnel in determining whether the gastric tube is inserted into the stomach. The auxiliary module 3 helps medical personnel expand the oral opening when the temporomandibular joint is locked or the masseter muscle reflex is hyperactive. The clamping module 4 uses pressure to coordinately fix the gastric tube body 1 and the guide wire body 102 to prevent the gastric tube from passing through the throat stenosis. In case the guide wire accidentally slips off, an elliptical end module 2 is fixed at one end of the guide wire body 102, and the elliptical end module 2 at least includes a fixed elliptical end 201, one end of the fixed elliptical end 201 is fixed to one end of the guide wire body 102, a hidden shaft 202 is fixed at one end of the circumference of the fixed elliptical end 201, and a rotating elliptical end 203 is rotatably connected to the circumference of the hidden shaft 202, and a heteropolar magnet 204 is fixed at one end of the inner wall of the elliptical end 203, and a V-shaped electromagnet 205 is fixed on the inner wall of the elliptical end 203. The V-shaped electromagnet 205 is powered by a supercapacitor, and the supercapacitor is fixed on the inner wall of the elliptical end 203. A signal receiver is provided on the inner wall of the elliptical end 203, and a charging contact 206 is fixed on the circumference of the elliptical end 203, and the charging contact 206 is electrically connected to the supercapacitor, and a sealing cover is nested on the surface of the elliptical end 203 207, an inner base block 208 is fixed at the bottom of the fixed elliptical end 201, elastic pressure hooks 209 are fixed on both sides of the inner base block 208, a base pressure plate 2010 is fixed at the bottom of the inner base block 208, and a test paper 2011 is fixed at one end of the elastic pressure hook 209. In the present invention, when the staff needs to implant the gastric tube body 1 into the stomach of a stroke swallowing dysfunction patient, the guide wire body 102 is placed inside the gastric tube body 1, and then implanted to prevent the tube from bending and deforming when passing through the three physiological narrowings of the esophagus, the cricopharyngeal part, the aortic arch, and the diaphragmatic hiatus. After the medical staff completes the implantation and the gastric tube is inserted to a suitable length, the guide wire is further pushed forward to make it contact with the gastric mucosa. The elliptical end module 2 at the front end of the guide wire is elliptical to avoid damaging the gastric mucosa. At the same time, the control device is used to send instructions to the signal receiver to discharge the supercapacitor and energize the V-shaped electromagnet 205 to generate magnetism. Since the V-shaped electromagnets 205 on both sides are relatively polar with the same poles, repulsion is generated. The repulsive force pushes the ellipsoidal end 203 to separate on both sides with the hidden axis 202 as the axis, so that the test paper 2011 inside the ellipsoidal end 203 leaks out and contacts the gastric mucosa. After waiting for 10 seconds, the guide wire is pulled out. If the test paper at the front end changes color, it can be judged that the gastric tube is in the stomach. If it does not change color, it may have entered the trachea by mistake. After use, the medical staff only needs to pry open the sealing cover 207 and use an external charging device to contact the charging contact 206 to recharge the supercapacitor, and then re-embed the sealing cover 207 into the ellipsoidal end 203 to pull out the used test paper.Break open the elastic pressure hook 209 and place the new test paper 2011 on both sides of the base pressure plate 2010. After releasing the elastic pressure hook 209, it will recover and fix the test paper 2011 by pressure. Place multiple test papers 2011 to prevent misjudgment.

[0057] Embodiment 2:

[0058] See also Figures 5-11 , this embodiment provides the following technical solutions: the auxiliary module 3 at least includes a cross base 301, the top of the cross base 301 is rotatably connected to an active threaded rotary disk 3014, a fixed cylinder column 305 is fixed at the bottom of the cross base 301, a ladder limit groove 306 is provided on the circumference of the fixed cylinder column 305, sliding grooves 302 are provided on both sides of the cross base 301, and the inner wall of the sliding groove 302 is slidably connected to a limited slip block 303, an upper limit plate 304 is fixed on the top of the limited slip block 303, a rotation extension connecting rod 3011 is fixed at the bottom of the limited slip block 303, and both sides of the rotation extension connecting rod 3011 are rotatably connected to a rotation short connecting rod 3011. The connecting rod 3010 has one end that is rotatably connected to the circumferential plate 309, a bottom-pushing cylinder 308 is fixed to one side of the circumferential plate 309, a ladder slide 307 is fixed to the inner wall of the bottom-pushing cylinder 308, the surface of the ladder slide 307 is slidably connected to the inner wall of the ladder limit groove 306, a bottom-pushing chassis 3012 is fixed to the bottom of the bottom-pushing cylinder 308, a driven threaded column 3013 is fixed to the top of the bottom-pushing chassis 3012, the thread groove of the driven threaded column 3013 is threadedly connected to the thread groove of the active threaded rotary disk 3014, and a chewing glue 3015 is rotatably connected to one side of the long connecting rod 3011; When a stroke patient needs to have a gastric tube implanted, the medical staff opens the patient's lower jaw to 1.5 degrees, then inserts the auxiliary module 3 into the patient's mouth, and makes the patient's teeth bite the chewing gum 3015 to support the bite and prevent damage to the patient's teeth. Then, the active threaded dial 3014 is rotated. Due to the threaded connection and the restriction of the charging contact 206 and the ladder slide 307, the driven threaded column 3013 moves upward, pulling the push bottom plate 3012 and the push bottom cylinder 308 to move upward, so that the short connecting rod 3010 rotates and pushes the long connecting rod 3011. Due to the sliding groove 302 and the The limited slip moment block 303 makes the rotating connecting rod 3011 move away from both ends. Since the chewing gum 3015 and the rotating connecting rod 3011 have a certain angle of rotation space, when the rotating connecting rod 3011 moves away, the angle between the chewing gum 3015 and the rotating connecting rod 3011 also changes continuously, so as to conform to the arc change of the human mouth, so that the patient's mandible is gradually expanded to meet the 2.5 cm operating space required for the standard gastric tube insertion. Then the medical staff inserts the gastric tube body 1 through the hollow in the middle of the driven threaded column 3013, and then implants it into the patient's stomach.

[0059] The pressing module 4 at least includes a fixed hollow disk 401. The bottom of the fixed hollow disk 401 is fixed to the top of the driven threaded column 3013. A plurality of positioning grooves 403 are formed in the top of the fixed hollow disk 401. A rotating wheel groove 402 is formed in the inner wall of the fixed hollow disk 401. A wheel shaft column 404 is rotatably connected to the inner wall of the rotating wheel groove 402. A pressing eccentric wheel 405 is fixed to the circumferential surface of the wheel shaft column 404. A pulling side handle 406 is fixed to the circumferential surface of the pressing eccentric wheel 405. A positioning point 407 is fixed to the top of the pressing eccentric wheel 405. In the present invention, when medical staff implants the gastric tube main body 1, a guide wire main body 102 is often required for assistance. And the relative position between the two needs to be kept stable as much as possible. And the tip of the guide wire main body 102 should always be at a safe distance of 2-3 cm from the end of the gastric tube. Before and after the staff uses the auxiliary module 3 to expand the patient's lower jaw, the gastric tube main body 1 can be passed through the fixed hollow disk 401 first. Then the guide wire main body 102 is placed into the gastric tube main body 1. After determining the position, the medical staff rotates the pressing eccentric wheel 405 inward through the pulling side handle 406, so that the pressing eccentric wheel 405 presses the gastric tube main body 1 and the guide wire main body 102. The positioning point 407 is nested with the positioning groove 403 to fix the position of the pressing eccentric wheel 405, so that the pressing eccentric wheel 405 fixes the relative position of the two through pressure. Then the gastric tube is implanted into the patient, thus better ensuring the stability during its use;

[0060] Embodiment 3:

[0061] Please refer to Figures 1-11 , in this embodiment, the staff applies the device disclosed in the present invention in the neurology department of a certain hospital. The device uses a super capacitor to supply power to the V-shaped electromagnet 205. The model of the super capacitor is NB614S224N-TR of NYFEA Laifei Company, with a size of 6.8×1.4 mm, a capacity of 0.6 F, and a rated voltage of 3.3 V. It drives a 3V / 0.5A small electromagnet and can work for about 2 seconds. After use, it is directly charged through an external 3.3V power supply to meet the requirements of the device. The test strip 2011 uses a Shunemei acid-base PH test strip. The test strip is sterile and can be directly in contact with the oral cavity in clinical practice to detect the PH value, thus better ensuring safety;

[0062] The staff use this device to assist medical staff in gastric tube implantation, reducing the gastric tube implantation time from about 13 minutes to about 4 minutes. At the same time, this device can better help intern nurses with gastric tube implantation, reducing the required experience basis for this operation and greatly reducing the personnel tension. Among the morning shift nurses from 6 am to 3 pm, 37 related patients were assisted. The gastric tube implantation that usually requires more than 3 people with certain experience was reduced to only 1 or 2 people, and the required experience basis was greatly reduced. At the same time, it is convenient for medical staff to operate, without worrying about oral dilation and tube biting. This makes it easier for medical staff to concentrate on gastric tube implantation. Among the 37 patients, 34 were successfully implanted once with this device, and three patients were successfully implanted on the second attempt. Among the three patients, two were operated by intern nurses for the first time, and re-implantation was quickly carried out through the judgment of the elliptical end module 2. The other patient was completely unconscious, making it difficult to cooperate with swallowing, and the tonsils were enlarged, resulting in success on the third attempt.

[0063] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A nasogastric tube with identification function, which is suitable for medical staff to quickly determine whether the gastric tube is in the stomach when a gastric tube is inserted into a patient with swallowing dysfunction due to stroke, and is characterized by: The nasogastric tube comprises a gastric tube body (1), an elliptical end module (2), an auxiliary module (3) and a compression module (4); a tube end (101) is fixed at one end of the gastric tube body (1), and a guide wire body (102) is provided on the inner wall of the gastric tube body (1); The elliptical end module (2) is used to assist medical personnel in determining whether the gastric tube has been placed in the stomach. The auxiliary module (3) helps medical personnel expand the oral opening when the temporomandibular joint is locked or the masseter muscle reflex is hyperactive. The pressing module (4) uses pressure to coordinately fix the gastric tube body (1) and the guide wire body (102) to prevent the guide wire from accidentally slipping off when passing through a narrow area of ​​the throat. An elliptical end module (2) is fixed to one end of the guide wire body (102), and the elliptical end module (2) comprises at least a fixed elliptical end (201), one end of the fixed elliptical end (201) is fixed to one end of the guide wire body (102), a hidden shaft (202) is fixed to one end of the circumference of the fixed elliptical end (201), the circumference of the hidden shaft (202) is rotatably connected to a rotating elliptical end (203), one end of the inner wall of the rotating elliptical end (203) is fixed to a magnet with different poles (204), and a V-shaped electromagnet (205) is fixed to the inner wall of the rotating elliptical end (203), and the V-shaped electromagnet (205) is powered by a super capacitor, and the super capacitor The device is fixed to the inner wall of the spiral ellipsoid end (203), the inner wall of the spiral ellipsoid end (203) is provided with a signal receiver, the peripheral surface of the spiral ellipsoid end (203) is fixed with a charging contact (206), the charging contact (206) is electrically connected to the super capacitor, the surface of the spiral ellipsoid end (203) is embedded with a sealing cover (207), the bottom of the fixed ellipsoid end (201) is fixed with an inner base block (208), both sides of the inner base block (208) are fixed with elastic pressure hooks (209), the bottom of the inner base block (208) is fixed with a base pressure plate (2010), and one end of the elastic pressure hook (209) is pressure-fixed with a measuring test paper (2011).

2. A nasogastric tube with identification function according to claim 1, characterized in that: The auxiliary module (3) at least comprises a cross base (301), the top of the cross base (301) is rotatably connected to an active threaded rotary disc (3014), the bottom of the cross base (301) is fixed with a fixed cylinder column (305), the circumferential surface of the fixed cylinder column (305) is provided with a ladder limit groove (306), both sides of the cross base (301) are provided with sliding grooves (302), the inner wall of the sliding groove (302) is slidably connected to a limited slip block (303), the top of the limited slip block (303) is fixed with an upper limit plate (304), the bottom of the limited slip block (303) is fixed with a rotation extension link (3011), both sides of the rotation extension link (3011) are rotatably connected to a rotation shortening link (306). 010), one end of the rotating short connecting rod (3010) is rotatably connected with a circumferential axis plate (309), one side of the circumferential axis plate (309) is fixed with a bottom push cylinder (308), the inner wall of the bottom push cylinder (308) is fixed with a ladder slide (307), the surface of the ladder slide (307) is slidably connected with the inner wall of the ladder limit groove (306), the bottom of the bottom push cylinder (308) is fixed with a push bottom plate (3012), the top of the push bottom plate (3012) is fixed with a driven threaded column (3013), the thread groove of the driven threaded column (3013) is threadedly connected with the thread groove of the active threaded rotary disk (3014), and one side of the rotating long connecting rod (3011) is rotatably connected with a chewing gum (3015).

3. A nasogastric tube with identification function according to claim 1, characterized in that: The clamping module (4) at least comprises a fixed hollow disk (401), the bottom of the fixed hollow disk (401) is fixed to the top of the driven threaded column (3013), a plurality of positioning grooves (403) are provided on the top of the fixed hollow disk (401), a rotating wheel groove (402) is provided on the inner wall of the fixed hollow disk (401), a wheel shaft column (404) is rotatably connected to the inner wall of the rotating wheel groove (402), a clamping eccentric wheel (405) is fixed on the circumference of the wheel shaft column (404), a pull-out side handle (406) is fixed on the circumference of the clamping eccentric wheel (405), and a positioning point (407) is fixed on the top of the clamping eccentric wheel (405).

4. A nasogastric tube with identification function according to claim 2, characterized in that: A rectangular groove is provided at the top of the cross base (301), a spring sheet (8) is fixed to the inner wall of the rectangular groove, a nested ball (801) is fixed to one end of the spring sheet (8), and a spherical groove is provided in a circular array at the bottom of the active threaded rotary disc (3014), and the inner wall of the spherical groove is nested with the surface of the nested ball (801).

5. A nasogastric tube with identification function according to claim 3, characterized in that: The surface of the pull-out side handle (406) is provided with a perforation, the inner wall of the perforation is provided with a hanging rope (5), and the peripheral surface of the hanging rope (5) is provided with an information label (501).

6. A nasogastric tube with identification function according to claim 2, characterized in that: Control handles (6) are fixed to both ends of the cross base (301), friction-enhancing ladder members (7) are fixed in a circular array on the top of the active threaded rotary disc (3014), and a rubber pad is fixed to the bottom of the ladder slide member (307).

7. A nasogastric tube with identification function according to claim 3, characterized in that: The pulling side handle (406) is provided with an oblique groove, and the circumferential surface of the pressing eccentric wheel (405) is provided with an anti-slip groove.

Images