A gastrointestinal catheterization scope and methods of use thereof

Abstract

The present application relates to the field of medical devices, and discloses a gastrointestinal catheterization mirror and a method for using the same. The catheterization mirror comprises a camera device, an illumination element arranged in the camera device, the illumination element being used for illuminating an object, a traction member comprising at least one threading channel, one end of the traction member being connected to the camera device, and the other end being connected to a display device, and a dissolvable fixing member, the camera device and the traction member being fixed in front of a gastrointestinal catheter by the dissolvable fixing member. The gastrointestinal catheterization mirror can be used on gastrointestinal catheters of various specifications, realizes visible guided catheterization operation and withdrawal of the camera device after the fixing member is dissolved, thereby getting rid of blind insertion of the gastrointestinal catheter, and further eliminating the need for confirmation of the catheter placement position across clinical departments, and the gastrointestinal catheterization mirror has low manufacturing cost and is disposable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a gastrointestinal catheter intubation mirror and a method for using the same. BACKGROUND

[0002] In the treatment process, a nose-gastric tube, a nose-jejunum feeding tube and a gastrointestinal decompression tube, collectively referred to as a gastrointestinal catheter, are often placed in the digestive tract of a patient. The placement process is to insert the corresponding catheter into the patient's nasal cavity or oral cavity, pass through the laryngopharynx, esophagus, stomach, duodenum and reach the jejunum. When the front end of the catheter reaches the laryngopharynx, it must be inserted into the esophagus opening to avoid being inserted into the trachea. The operation of placing a nose-jejunum feeding tube is the most difficult. After the nose-jejunum feeding tube enters the stomach, the front end of the tube must be aligned and passed through the pylorus to enter the duodenum and jejunum. During this period, the front end of the nose-jejunum feeding tube must be prevented from curling into a loop in the oral cavity or stomach to prevent the tube from entering the esophagus and pylorus. In the case of blind insertion, the operator cannot see the gastrointestinal catheter entering the patient's body, cannot control the direction of the catheter, and cannot determine whether the gastrointestinal catheter has accurately reached the specified site. Therefore, the gastrointestinal catheter must be sent to the specified site with the aid of B-ultrasound, magnetic navigation equipment or an endoscope, and various methods must be used to verify whether the gastrointestinal catheter has accurately reached the duodenum or jejunum. Common verification methods include abdominal X-ray, pH value detection of digestive tract fluid and water sound auscultation in the abdominal cavity. To complete the above-mentioned auxiliary catheterization process, such as X-ray fluoroscopy, B-ultrasound assisted catheterization and endoscope assisted catheterization, the patient must be transported to the relevant department for intubation or examination and operated by a professional physician in the department. This requires the patient to be scheduled for examination and transported to the relevant department, which increases the safety risk during the patient transfer process and increases the patient's cost. In the process of catheterization guided by B-ultrasound and magnetic navigation equipment, the relevant anatomical sites and images cannot be seen. In the process of endoscope assisted intubation, a professional endoscope physician must be operated, the patient must endure the pain of double tube insertion of the endoscope and the gastrointestinal catheter, and the patient's risk of infection is increased. The use of an endoscope and the corresponding cleaning equipment in each application department is expensive and unrealistic.

[0003] Therefore, how to provide a gastrointestinal catheter intubation device with low cost, which can eliminate blind insertion and eliminate cross-clinical department operation, has become a problem to be solved by those skilled in the art. SUMMARY

[0004] To solve the above technical problems, the present application provides a gastrointestinal catheter intubation mirror with low cost, which can eliminate blind insertion and eliminate cross-clinical department operation, and a method for using the gastrointestinal catheter intubation mirror.

[0005] To achieve the above-mentioned purposes, the present application provides the following solutions:

[0006] The present application provides a gastrointestinal catheterization endoscope, comprising:

[0007] A camera device is provided with an illuminating element for illuminating the subject;

[0008] A traction member comprises at least one threading channel arranged along the length of the traction member, one end of the traction member is connected to the camera device, and the free end of the data line of the camera device extends through one of the threading channels;

[0009] A dissolvable fixing member connects the camera device to the gastrointestinal catheter.

[0010] Optionally, the dissolvable fixing member fixes the camera device and the traction member in front of the gastrointestinal catheter, and the camera device is coaxially arranged with the gastrointestinal catheter.

[0011] Optionally, the dissolvable fixing member is a dissolvable fixing sleeve, the camera device is arranged inside the dissolvable fixing sleeve, the lens of the camera device is arranged opposite to the front end opening of the dissolvable fixing sleeve, and the other end of the traction member extends through the rear end of the dissolvable fixing sleeve.

[0012] Optionally, one side of the dissolvable fixing sleeve protrudes outward to form a receiving cavity for accommodating the traction member, and the receiving cavity is arranged along the length of the dissolvable fixing sleeve.

[0013] Optionally, the dissolvable fixing member is a dissolvable fixing film, the front end of the camera device and the traction member are arranged in front of the gastrointestinal catheter, the front end of the camera device, the traction member, and the front end of the gastrointestinal catheter are fixed by the dissolvable fixing film, the front end of the dissolvable fixing film exposes the front end of the camera device, and the other end of the traction member extends through the rear end of the dissolvable fixing film.

[0014] Optionally, the dissolvable fixing member is made of a stomach-dissolving material or an enteric material, and the time from contacting the gastrointestinal fluid to starting to dissolve is longer than the required time for the gastrointestinal catheterization operation.

[0015] Optionally, the dissolvable fixing member contains a pigment.

[0016] Optionally, the gastrointestinal catheterization endoscope further comprises a transparent cover arranged in front of the lens of the camera device and sealingly connected to the shell of the camera device to protect the lens, the surface of the transparent cover has a hydrophobic coating, and the outer wall of the shell of the camera device is streamlined.

[0017] Optionally, the traction member further includes at least one injection / suction channel, which is arranged along the length direction of the traction member.

[0018] The present invention also provides a method for using the aforementioned gastrointestinal catheter placement endoscope, comprising the following steps:

[0019] Step 1: Before insertion, confirm that the gastrointestinal catheter insertion endoscope has been fixed at the front end of the gastrointestinal catheter, and electrically connect the data cable to the display device;

[0020] Step 2: During tube placement, the display device activates the recording function. Guided by the images captured by the camera device, the gastrointestinal tube is inserted into the digestive tract while the traction device is pulled to adjust the orientation of the front end of the gastrointestinal tube.

[0021] Step 3: After the tube is in place, based on the morphological characteristics of the gastrointestinal tract along the insertion path, confirm that the gastrointestinal tube has been successfully inserted and that its placement is correct. If necessary, replay the video for further confirmation.

[0022] Step four, withdrawal: After the soluble fixing component has completely dissolved, pull the traction component to withdraw the camera device from the body along its insertion path.

[0023] The present invention achieves the following technical effects compared to the prior art:

[0024] 1. The gastrointestinal catheter placement endoscope provided by this invention allows for placement under visual and guided conditions with the aid of a camera device, completely eliminating blind insertion and avoiding the need for blind insertion, such as the gastrointestinal catheter coiling into loops in the stomach, repeated insertion, and double insertion of the endoscope. This greatly shortens the placement time and reduces patient suffering.

[0025] 2. The gastrointestinal catheter placement endoscope provided by this invention eliminates the need for assistance from other departments such as the endoscopy department and ultrasound department, thereby avoiding cross-departmental operations, saving departmental time, avoiding patient movement, reducing patient pain and infection risk, and reducing related costs.

[0026] 3. Compared with equipping each department with an endoscope, the gastrointestinal catheter placement endoscope provided in this embodiment is more cost-effective for inserting gastrointestinal catheters into the human body.

[0027] 4. The gastrointestinal catheter placement endoscope provided by this invention is for single use only and is discarded after use. It does not require repeated cleaning and sterilization, thus eliminating cross-infection. Attached Figure Description

[0028] To more clearly illustrate the embodiments and technical solutions of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram illustrating the combination of the gastrointestinal catheter placement endoscope and the gastrointestinal catheter in an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the gastrointestinal catheter placement endoscope provided in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram illustrating the configuration of the gastrointestinal catheter placement endoscope camera device and traction device provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the first angle of the soluble fixation sleeve of the gastrointestinal catheter placement endoscope provided in the embodiment of the present invention;

[0033] Figure 5 This is a second-angle schematic diagram of the soluble fixation sleeve of the gastrointestinal catheter placement endoscope provided in the embodiments of the present invention;

[0034] Figure 6 This is a schematic diagram of the gastrointestinal catheter placement endoscope camera device provided in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the gastrointestinal catheter placement endoscope passing through the pharynx in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the gastrointestinal catheter placement endoscope passing through the pylorus in an embodiment of the present invention.

[0037] Figures 1-8 Explanation of reference numerals in the attached drawings: 100, gastrointestinal catheter placement endoscope; 1, camera device; 2, illumination element; 3, traction element; 301, injection / aspiration channel; 302, suture channel; 4, soluble fixation sleeve; 401, injection / aspiration port; 402, front opening; 403, rear opening; 404, receiving cavity; 5, transparent cover; 6, gastrointestinal catheter; 601, fluid outlet; 7, plug; 8, connector; 9, metal guidewire; 10, guidewire handle. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The purpose of this invention is to provide a low-cost gastrointestinal catheter placement endoscope that eliminates blind insertion and avoids cross-departmental operations, as well as a method for using the gastrointestinal catheter placement endoscope.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] refer to Figures 1-8 As shown, the gastrointestinal catheter placement endoscope 100 provided in this embodiment includes: a camera device 1, a traction member 3, and a soluble fixation member. The camera device 1 is equipped with an illumination element 2, which is used to illuminate the subject.

[0042] Because the diameter of commonly used gastrointestinal tubes 6, especially nasojejunal feeding tubes, is very small, if the imaging device 1 is placed inside the gastrointestinal tube 6, an extremely small imaging device 1 must be selected, resulting in reduced image quality and increased manufacturing costs. Therefore, it is preferable to securely fix the imaging device 1 and the traction member 3 to the external front end of the gastrointestinal tube 6 during insertion, and to set them coaxially with the gastrointestinal tube 6. This design allows the diameter of the imaging device 1 to be the same as or even slightly larger than the diameter of the gastrointestinal tube 6, thereby increasing the range of options for the imaging device 1, improving image quality, and reducing manufacturing costs.

[0043] In this embodiment, a soluble fixation element is used to fix the camera device 1 and the traction element 3 together with the gastrointestinal catheter 6. The camera device 1 of the gastrointestinal catheter placement endoscope 100 is in an axial, i.e. front-to-back position relationship with the gastrointestinal catheter 6. After connection, the camera device 1 does not increase the insertion diameter of the gastrointestinal catheter 6. Therefore, a larger size camera device 1 can be selected, which is beneficial to improve image quality and obtain satisfactory illumination intensity.

[0044] In this embodiment, in order to avoid scratching the digestive tract mucosa during the process of the traction member 3 pulling the camera device 1, the outer wall of the camera device 1 is designed to be smooth and streamlined.

[0045] In this embodiment, as Figure 6As shown, a camera with built-in LED illumination is used as the camera device 1. The camera device also includes a transparent cover 5, which is located at the front end of the camera device 1 and is sealed to the outer casing of the camera device 1 to protect the lens and illumination element 2 of the camera device 1 and prevent the lens from being corroded by gastric and intestinal fluids. A hydrophobic coating is applied to the surface of the transparent cover 5 to reduce and prevent liquids and mucus from the digestive tract from adhering to the lens surface and affecting the clarity of the image.

[0046] The traction component 3 serves as the connection channel between the camera device 1 and the display device at the rear of the endoscope, and also as the channel connecting the rear infusion and aspiration device. While the data cable connection between the camera device 1 and the display device is essential, the infusion and aspiration channel 301 is not mandatory. The same function can be achieved through the irrigation channel of the gastrointestinal tube 6. For example, nasogastric tubes, which typically do not require guidewires, can be infused and aspirated through the irrigation channel during insertion. However, in some insertion processes, the irrigation channel of the gastrointestinal tube 6 cannot be infused and aspirated due to the presence of guidewires, such as with nasojejunal feeding tubes. Therefore, the traction component 3 should include at least one catheter, each including at least one lumen, with each lumen extending along the length of the catheter. The lumen serves as either the infusion and aspiration channel 301 or the threading channel 302. The length of the traction component 3 is longer than that of the gastrointestinal tube 6. Specifically, in this embodiment, the traction component 3 consists of two catheters arranged side-by-side and separable at their front and rear ends. Each catheter contains one lumen, one of which serves as the infusion and aspiration channel 301, and the other as the threading channel 302.

[0047] The soluble fixation element is provided with at least one injection / aspiration hole 401, which corresponds one-to-one with and is connected to the injection / aspiration channel 301. Liquid or gas is injected into the front of the gastrointestinal catheter placement endoscope 100 through the injection / aspiration channel 301. The injected liquid can be physiological saline, used to flush out mucus in the digestive tract that obstructs the lens view, or a therapeutic solution. The injected gas is used to open the gastrointestinal tract, which is beneficial for clearly observing the structural features of the digestive tract and determining the placement direction of the gastrointestinal catheter placement endoscope 100. A connector 8, such as a Luer connector or a syringe connector, is provided at the tail end of the injection / aspiration channel 301. The connector 8 is used to connect to the injection / aspiration device or to a syringe. Mucus in front of the lens can be flushed away or aspirated through the injection / aspiration channel 301, opening a clean field of view for smooth catheter placement.

[0048] One end of the data cable is electrically connected to the internal components of the camera device 1, and the other end is the free end. A plug 7, such as a USB plug, is connected to the free end of the data cable. In use, the free end of the data cable is connected to a display device using this plug 7. The display device is used to display the images captured by the camera device 1. The display device can be a mobile phone, computer, monitor, or Wi-Fi converter. The Wi-Fi converter converts the image signal from the camera device 1 into a wireless signal. After the mobile phone connects wirelessly to the Wi-Fi signal via WLAN, it can run an app to display the images captured by the camera device 1. The display device should have photo and video recording functions so that it can record the location of the gastrointestinal catheter placement endoscope 100 in the gastrointestinal tract during placement, enabling bedside placement location confirmation and post-placement traceability.

[0049] In addition to providing a passageway for the data cable and a passageway for injecting or aspirating liquids or gases into the digestive tract, the third function of the traction device 3 is to provide guidance and control for the gastrointestinal catheter placement endoscope 100. By pulling the tail end of the traction device 3 outside the nasal cavity or oral cavity, the guiding camera device 1 will be turned to the same side as the traction device 3.

[0050] After the insertion procedure is completed, the gastrointestinal tube 6 will be left in the digestive tract for a long period of time. This is used to regularly infuse the digestive tract with nutrient solution, medication, and cleaning solution. Meanwhile, the camera device 1 and the traction device 3 must be removed from the digestive tract to prevent corrosion and damage from the long-term presence of digestive fluids. Therefore, the key to this solution, which uses a soluble fixation device, is how to release the camera device 1 and the traction device 3 from the gastrointestinal tube 6 after insertion, allowing for their removal.

[0051] In this embodiment, the camera device 1 and the traction member 3 are connected to the gastrointestinal catheter 6 through a soluble fixation member 4, so that the soluble fixation member 4 will soften and dissolve after the catheter is inserted, thereby separating the camera device 1 and the traction member 3 from the gastrointestinal catheter 6.

[0052] The soluble fixation element is made of a material that can dissolve in the digestive tract. In this embodiment, the soluble fixation element is made of a gastric-soluble or enteric-soluble material. For example, the material used in pharmaceutical capsule shells that dissolves in the stomach or intestines after swallowing can be used as a gastric-soluble or enteric-soluble material. For example, a soluble material made primarily of animal-based gelatin or plant-based cassava starch mixed with glycerin, water, pigments, etc. There are many types of such material formulations, which will not be elaborated here. However, the principle to be followed is that when the gastrointestinal catheter placement endoscope 100 is adapted to a nasojejunal feeding tube, a soluble fixation element made of an enteric-soluble material should be selected to avoid the soluble fixation element softening and dissolving when passing through the stomach. When the gastrointestinal catheter placement endoscope 100 is adapted to a nasogastric tube, a soluble fixation element made of a gastric-soluble material should be selected to avoid the soluble fixation element being unable to dissolve in the stomach. After the catheter is inserted, the metal guide wire 9 is removed, and physiological saline or purified water at body temperature is injected into the digestive tract through the infusion channel of the gastrointestinal catheter 6 to create a localized diluted gastric or intestinal fluid environment, which promotes the dissolvable fixation element to dissolve, thereby separating the gastrointestinal catheter 6 from the camera device 1 and the traction element 3.

[0053] The dissolvable fixation element can be made of rigid or flexible material, with flexibility being preferred. Flexible dissolvable fixation elements are safer for the digestive tract mucosa during insertion, reducing the likelihood of damage. Rigid materials allow for thinner walls, suitable for fitting smaller gastrointestinal catheters 6. Furthermore, depending on the required insertion time, the proportions of the gastric-soluble or enteric-soluble material are adjusted to delay dissolution after contact with saline and digestive tract fluids, ensuring sufficient time for the insertion process. The dissolvable fixation element softens and dissolves only after the insertion is complete. In clinical practice, the gastrointestinal catheter 6 remains in the gastrointestinal tract for an extended period after insertion, while the gastrointestinal catheter placement endoscope 100 should be removed immediately. According to the needs of gastrointestinal catheter care, it may be more meaningful to leave the gastrointestinal catheter placement endoscope 100 in the digestive tract for a longer period of time. For example, after the catheter is in place, it can be left in place for 2 to 4 hours. During this period, while waiting for the dissolvable fixation to dissolve, the flow of the infused nutrient solution and flushing fluid can be observed using the camera device 1 to determine whether the position of the gastrointestinal catheter 6 needs to be adjusted back and forth to make the nutrient solution flow more smoothly and to avoid the outlet hole 601 of the gastrointestinal catheter 6 from sticking to the intestinal wall, which would cause the nutrient solution flow to slow down or even block the tube.

[0054] like Figure 4As shown, one alternative embodiment of the soluble fixation device is a soluble fixation sleeve 4, which is fitted onto the front end of the gastrointestinal tube 6. The fixation sleeve is made of soluble material using a molding method, and its length is approximately two to three times the length of half a pharmaceutical capsule shell. Besides the space required for the built-in camera device 1 and traction device 3, the remaining space within the soluble fixation sleeve 4 is used to ensure connection with the gastrointestinal tube 6 and to ensure stability after connection. The soluble fixation sleeve 4 has a front opening 402 with an arc-shaped constriction, and a rear opening 403 that communicates with the interior of the soluble fixation sleeve 4. The camera device 1 and traction device 3 are inserted into the soluble fixation sleeve 4 through the rear opening 403 and fixed at the very front end inside the soluble fixation sleeve 4. Through the front opening 402 of the soluble fixation sleeve 4, the illumination element 2 can illuminate the front field of view of the soluble fixation sleeve 4, and the camera device 1 can capture the scene outside the front opening 402 of the soluble fixation sleeve 4. Figure 5 As shown, one side of the soluble fixing sleeve 4 protrudes outward to form a receiving cavity 404 for accommodating the traction member 3, and the receiving cavity 404 is arranged along the length direction of the soluble fixing sleeve 4.

[0055] The gastrointestinal catheter placement endoscope 100 with a dissolvable fixation sleeve 4 can be designed and manufactured according to the model and specifications of commercially available gastrointestinal catheters 6. It is individually packaged. In clinical use, the package is opened, the gastrointestinal catheter placement endoscope 100 is taken out, and it is put on the commercially available gastrointestinal catheter 6 of the same size and model. The advantage is that it has a wide range of compatibility and can be used with various specifications of commercially available gastrointestinal catheters 6. Of course, the manufacturers of gastrointestinal catheters 6 can also directly put the dissolvable fixation sleeve 4 on the gastrointestinal catheter 6 and then sell it. In clinical use, there is no need to put it on again. It can be used directly after opening the packaging of the gastrointestinal catheter 6.

[0056] Another embodiment of the soluble fixation device is a soluble fixation membrane. The front ends of the camera device 1 and the traction member 3 are located at the front end of the gastrointestinal tube 6. The soluble fixation membrane wraps and fixes the front ends of the camera device 1, the traction member 3, and the gastrointestinal tube 6. The front end of the soluble fixation membrane protrudes from the front end of the camera device 1 to expose the lens of the camera device 1 for imaging. At the same time, the front end of the soluble fixation membrane exposes one end of the injection / absorption channel 301 near the camera device 1 to inject liquid or gas into the human body using the injection / absorption channel 301. The other end of the traction member 3 extends through the rear end of the soluble fixation membrane.

[0057] Specifically, liquid gastric-soluble or enteric-coated materials, such as liquid pharmaceutical capsule materials with adjusted viscosity, are applied to the surfaces of the imaging device 1 and the gastrointestinal catheter 6 and then solidified. In capsule manufacturing processes, the viscosity of the gastric-soluble or enteric-coated material can be increased or decreased by adjusting the component ratio. The imaging device 1 and the traction element 3 are placed coaxially in front of the gastrointestinal catheter 6, one in front of the other. The gastric-soluble or enteric-coated material is evenly coated onto the surfaces of the imaging device 1 and the gastrointestinal catheter 6 and allowed to solidify, forming a dissolvable fixation film. The formation of this dissolvable fixation film simultaneously connects and fixes the imaging device 1 and the traction element 3 to the gastrointestinal catheter 6. The gastrointestinal catheter placement endoscope 100 with the dissolvable fixation film must be packaged and sold by the manufacturer of the gastrointestinal catheter 6 after the imaging device 1, traction element 3, and gastrointestinal catheter 6 are connected and fixed. The advantage is its convenience for clinical use; it can be used immediately upon opening the product packaging without the need for a separate assembly.

[0058] In this embodiment, the soluble fixation element may contain pigment. During the dissolution process of the soluble fixation element, the change in the color of the liquid around the field of view can be observed in the image captured by the camera device 1. Based on the change in the color of the liquid around the field of view, it is more convenient and accurate to determine the start time of the fixation dissolution, judge the degree of completion of the dissolution process, and confirm when the camera device 1 can be withdrawn.

[0059] In this embodiment, the catheter of the traction member 3 is a medical hose, for example, a medical polyurethane hose or a medical silicone tube can be used as the catheter.

[0060] The method of using the gastrointestinal catheter placement endoscope 100 provided in this embodiment includes the following steps:

[0061] Step 1: Confirm that the intubation endoscope has been fixed at the front end of the gastrointestinal catheter 6. Connect the data cable to the display device and connect the end of the injection / aspiration channel away from the soluble fixation member to the injection / aspiration device. The display device is used to display and record the images captured by the camera device 1. The injection / aspiration device can inject liquid or gas into the front of the gastrointestinal catheter intubation endoscope 100. The liquid or gas can expand the gastrointestinal tract. The injection / aspiration device can aspirate liquid or gas from the front of the gastrointestinal catheter intubation endoscope 100 to determine the insertion direction of the gastrointestinal catheter intubation endoscope 100.

[0062] Step 2: The display device starts recording. Guided by the image captured by the camera device 1, while pulling the traction member 3 to adjust the orientation of the front end of the gastrointestinal tube 6, the gastrointestinal tube 6 is inserted into the digestive tract lumen. The metal guide wire is also inserted into the gastrointestinal tube 6.

[0063] Step 3: After the gastrointestinal tube 6 is in place, review the video recording of the tube placement process and observe the morphological characteristics of the digestive tract lumen through which the gastrointestinal tube 6 passes. On the nasogastric tube insertion path, at least the dentate line at the junction of the esophageal mucosa and the gastric mucosa and the folds of the gastric body should be visible. On the path of the nasojejunal feeding tube, in addition to the above morphological characteristics, the gastric notch, the pylorus, and the annular folds of the descending duodenum should also be visible to confirm that the nasojejunal feeding tube placement process and the arrival position are correct.

[0064] Step 4: Leave a soluble fixation device, traction device 3 and camera device 1 in the gastrointestinal lumen until the soluble fixation device is completely dissolved. Then, pull the traction device 3 to remove the camera device 1 from the body along its insertion path.

[0065] The following section describes in detail the usage of the gastrointestinal catheter placement endoscope 100 provided in this embodiment, using the insertion process of a nasojejunal feeding tube as an example:

[0066] Before use, select a nasojejunal feeding tube or gastrointestinal tube as needed and confirm whether it is equipped with a gastrointestinal catheter placement scope 100. If the gastrointestinal tube 6 is not equipped with a gastrointestinal catheter placement scope 100, then a suitable gastrointestinal catheter placement scope 100 should be selected according to the specifications and solubility of the gastrointestinal tube 6 used.

[0067] Taking the use of a nasojejunal feeding tube without a gastrointestinal catheter placement endoscope 100 as an example, first confirm that an enteric-coated gastrointestinal catheter placement endoscope 100 should be selected. Based on the diameter of the selected nasojejunal feeding tube, determine that the inner diameter of the dissolvable fixing sleeve 4 of the gastrointestinal catheter placement endoscope 100 is the same as the diameter of the nasojejunal feeding tube.

[0068] Remove the gastrointestinal catheter placement endoscope 100 from the sterile packaging bag. Place the dissolvable fixation sleeve 4 onto the front end of the nasojejunal feeding tube, ensuring an interference fit. The nasojejunal feeding tube has a metal guidewire 9, with a guidewire handle 10 at its rear end. The traction element 3 extends along the outer surface of the nasojejunal feeding tube to its rear end. The data cable plug 7 of the camera device 1 is electrically connected to the display device. The infusion / aspiration channel connector 8 of the traction element 3 is connected to an infusion / aspiration device or syringe. After connection, the display device begins to power the camera device 1, the front illumination element 2 of the gastrointestinal catheter placement endoscope 100 illuminates, the camera device 1 begins to acquire images, and displays the images on the rear display device. Recording is activated as required.

[0069] refer to Figures 7-8As shown, after the soluble fixing sleeve 4 and the traction element 3 enter the nasal cavity along with the nasojejunal feeding tube, the nasojejunal feeding tube is inserted under the real-time image guidance of the display device. Externally, the traction element 3 is pulled, guiding the soluble fixing sleeve 4 at the front end of the nasojejunal feeding tube to turn and bend towards the traction element 3. The arc length of the bend depends on the size of the movement space at the front end of the nasojejunal feeding tube. If the front end of the nasojejunal feeding tube is in the oropharynx, and the front-end camera device 1 faces the openings of the esophagus and trachea, the nasojejunal feeding tube is restricted by the space in the oropharynx, and its movement space is very small. When the traction element 3 is pulled externally, the front end of the nasojejunal feeding tube only uses the posterior part of the soft palate as the bending constraint point. The length of the nasojejunal feeding tube from the posterior part of the soft palate to the esophageal opening is its maximum bending arc length, thereby aligning the front end of the nasojejunal feeding tube with the piriform fossa and the esophageal opening and inserting it. If necessary, air is injected into the esophagus through the aspiration channel to appropriately open the esophagus. When the image shows a serrated line, the nasojejunal feeding tube is about to enter the stomach. When the image shows the gastric notch and pylorus, it indicates that the nasojejunal feeding tube is about to enter and pass through the pylorus. Due to the large space inside the stomach, pulling the traction device 3 at this time will cause the nasojejunal feeding tube to bend with the cardia as the constraint point. The bending arc length is equal to the length of the nasojejunal feeding tube from the cardia to the pylorus. Pulling the traction device 3 externally will cause the tip of the nasojejunal feeding tube to bend towards the pylorus, thereby passing the tip of the nasojejunal feeding tube through the pylorus into the duodenum. After releasing the traction device 3, the bent nasojejunal feeding tube will be straightened by the elasticity of its built-in metal guide wire 9. In this embodiment, the traction member 3 is fixed to one side of the camera device 1. The nasojejunal feeding tube can only bend towards the traction member 3. Sometimes, the bending direction of the nasojejunal feeding tube cannot be completely aligned with the desired placement direction. In this case, the operator needs to manually rotate the nasojejunal feeding tube to make it rotate around the axis, thereby adjusting the bending direction of the nasojejunal feeding tube to align it with the desired placement direction. At this time, the metal guide wire 9 attached to the nasojejunal feeding tube itself will play an auxiliary role in rotational following. Of course, the traction member 3 can also have multiple tubes. For example, when the traction member 3 includes two tubes, the two tubes can be set opposite each other on both sides of the housing of the camera device 1. Pulling the tubes at different positions will guide the nasojejunal feeding tube to bend in different directions. The advantage of doing so is that the nasojejunal feeding tube will have an additional bending direction, but the problem is also obvious. Doing so will increase the diameter of the dissolvable fixing sleeve 4, and because the distance between the two traction tubes is very small and the nasojejunal feeding tube is prone to twisting in the digestive tract, the bending direction caused by traction is not necessarily the expected direction.

[0070] When the duodenal circular folds are seen in the endoscopic image of the gastrointestinal catheter placement (100), it indicates that the nasojejunal feeding tube has been placed correctly. At this point, the operator should check the placement themselves or have an experienced person review the video recording of the placement process to confirm that the placement path and final placement of the tube are correct. The operator can then hold the guidewire handle (10) and remove the metal guidewire (9) from the nasojejunal feeding tube. Afterward, normal saline is injected into the nasojejunal feeding tube to soften and dissolve the dissolvable fixation sleeve (4).

[0071] After removing the metal guidewire, nutrient solution infusion can begin. The flow rate of the nutrient solution can be observed through the indwelling camera device 1. The nasojejunal feeding tube can be pulled outside the mouth to adjust its position in real time, thereby increasing the flow rate of the nutrient solution and preventing tube blockage.

[0072] The color of the dissolving solution flowing past the lens indicates the start time of dissolution of the dissolvable retaining sleeve 4. However, this is not mandatory; the dwell time of the imaging device 1 and the traction member 3 can be extended to confirm complete dissolution of the dissolvable retaining sleeve 4. Pulling the traction member 3 withdraws the imaging device 1 from the body along its insertion path. The dissolving solution of the dissolvable retaining sleeve 4 is absorbed or excreted with the intestinal fluid.

[0073] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A gastrointestinal catheter placement endoscope, characterized in that, include: A camera device, the camera device including a camera with a built-in lighting element for illuminating the subject; The traction device includes at least one threading channel, which is arranged along the length of the traction device. One end of the traction device is connected to the camera device, and the free end of the data cable of the camera device extends out through one of the threading channels. The traction device is located on the side of the gastrointestinal catheter, and the catheter of the traction device is a medical flexible tube. The traction device has the function of providing guidance and control for the gastrointestinal catheter placement endoscope. Pulling the tail end of the traction device outside the nasal cavity or oral cavity will guide the camera device to turn to the same side as the traction device. A soluble fixation element containing pigment, wherein the camera device is connected to a gastrointestinal catheter via the soluble fixation element; The soluble fixation component secures the camera device and the traction component to the front of the gastrointestinal tube. The camera device is coaxially arranged with the gastrointestinal tube. The soluble fixation component is a soluble fixation sleeve, with the camera device disposed inside the soluble fixation sleeve and the lens of the camera device facing the front opening of the soluble fixation sleeve. The other end of the traction component extends through the rear end of the soluble fixation sleeve. The soluble fixation sleeve is fitted onto the front end of the gastrointestinal tube. Alternatively, the soluble fixation component is a soluble fixation membrane, with the front ends of the camera device and the traction component disposed at the front end of the gastrointestinal tube. The soluble fixation membrane wraps and fixes the camera device, the traction component, and the front end of the gastrointestinal tube, with the front end of the soluble fixation membrane protruding from the front end of the camera device. The other end of the traction component extends through the rear end of the soluble fixation membrane. The soluble fixation element is made of gastric-soluble or enteric-soluble material, and the time from contact with gastrointestinal fluid to the start of dissolution of the soluble fixation element is longer than the time required for the gastrointestinal catheter placement operation.

2. The gastrointestinal catheter placement endoscope according to claim 1, characterized in that, One side of the soluble fixing sleeve protrudes outward to form a receiving cavity for accommodating the traction member, and the receiving cavity is arranged along the length direction of the soluble fixing sleeve.

3. The gastrointestinal catheter placement endoscope according to claim 1, characterized in that, It also includes a transparent cover, which is disposed at the front end of the lens of the camera device and is sealed to the housing of the camera device to protect the lens. The surface of the transparent cover has a hydrophobic coating, and the outer wall of the housing of the camera device is streamlined.

4. The gastrointestinal catheter placement endoscope according to claim 1, characterized in that, The traction component further includes at least one injection / suction channel, which is arranged along the length direction of the traction component.

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