Medical catheters

Abstract

This application provides a medical catheter that solves the problem of inaccurate control during insertion of existing nasogastric tubes, reducing the reliance on the experience of medical personnel for accurate insertion. The medical catheter includes: a translucent catheter having an axially extending cavity for endoscope insertion; and a marking assembly including a plurality of endoscopic digits spaced axially from the translucent catheter; each endoscopic digit represents the distance between the corresponding endoscopic digit and the distal end of the translucent catheter, and each endoscopic digit is normally displayed when viewed radially from the inside out of the translucent catheter for observation from within the translucent catheter.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a medical catheter. Background Technology

[0002] Currently, the nasogastric tubes used in clinical practice are inserted into the patient's stomach through the nasal cavity, and may even reach the duodenum or jejunum. They are mainly used for patients who cannot eat or require gastrointestinal decompression, such as those undergoing major gastrectomy, oral surgery, esophageal cancer, laryngeal cancer, upper gastrointestinal bleeding, or coma, whose swallowing function is affected by various reasons; or patients with intestinal obstruction, acute gastrointestinal perforation peritonitis, acute poisoning requiring gastric lavage, etc. The tubes ensure that patients ingest sufficient calories, protein, and other nutrients to meet their nutritional and therapeutic needs and prevent malnutrition.

[0003] However, as the application of nasogastric tubes continues to expand and clinical needs increase, some problems have gradually emerged with existing nasogastric tubes. For example, during the insertion of the nasogastric tube in the order of nasal cavity-esophagus-stomach-duodenum-small intestine, medical staff often rely on experience to insert the tube, which makes it difficult for inexperienced medical staff to accurately control the depth of insertion. Utility Model Content

[0004] The purpose of this application is to provide a medical catheter that can solve the problem of the difficulty in accurately controlling the insertion of existing nasogastric tubes and reduce the dependence of the accuracy of insertion on the experience of medical staff.

[0005] Based on this, the embodiments of this application disclose a medical catheter, comprising:

[0006] A light-transmitting conduit having an axially extending cavity; and a marking assembly including a plurality of endoscopic digit markers spaced axially from the light-transmitting conduit; each endoscopic digit marker representing the distance between a corresponding endoscopic digit marker and the distal end of the light-transmitting conduit, and each endoscopic digit marker being normally displayed from the inside out along the radial direction of the light-transmitting conduit for observation from the interior of the light-transmitting conduit.

[0007] Using the above technical solution, the medical catheter of this application can be inserted into the body in the order of being pulled from the nasal cavity, esophagus, stomach, duodenum to small intestine under the guidance of an endoscope. Medical staff can directly observe the endoscopic digital mark on the translucent catheter through the lens of the endoscope, and observe the position of the endoscopic digital mark on the human body through the translucent catheter, thereby knowing the insertion depth and distal position of the medical catheter, thus achieving precise control of catheter insertion and greatly reducing the dependence on the experience of medical staff.

[0008] According to one embodiment of this application, the internal digital label is formed facing forward on the inner wall of the light-transmitting duct; or, the internal digital label is formed facing backward on the outer wall of the light-transmitting duct.

[0009] By adopting the above technical solution, the endoscope can observe the normal display state of the value represented by the endoscopic digital label from inside the light-transmitting catheter, and observe the position of the endoscopic digital label on the human body through the light-transmitting catheter, so as to intuitively know the insertion depth and distal position of the medical catheter.

[0010] According to one embodiment of this application, the identification component further includes an internal view positioning identifier that corresponds one-to-one with the internal view digital identifier, wherein the distance between each internal view positioning identifier and the distal end of the light-transmitting duct is equal to the value represented by the corresponding internal view digital identifier.

[0011] Using the above technical solution, the endoscopic positioning mark can accurately indicate the scale position indicated by the corresponding endoscopic digital mark, so that medical staff can accurately know the insertion depth and distal position of the medical catheter, thereby achieving precise control of the intubation.

[0012] According to one embodiment of this application, each endoscopic digital identifier is located on the far side of the corresponding endoscopic positioning identifier.

[0013] Using the above technical solution, when the medical catheter is inserted into the body, the endoscope inserted into the cavity of the translucent catheter will first observe the internal viewing digital mark and then observe the internal viewing positioning mark during the process of pulling back, matching the operator's observation habits.

[0014] According to one embodiment of this application, when the internal view digit identifier has at least two digits, the digits in the internal view digit identifier are arranged in descending order along the axial direction from near to far.

[0015] Using the above technical solution, medical staff can observe the normal display status of the values ​​represented by the endoscopic digital label through the endoscope, meeting the needs of medical staff for quick and accurate readings.

[0016] According to one embodiment of this application, the marking component further includes a plurality of external viewing digits arranged axially at intervals in the light-transmitting duct and external viewing positioning marks corresponding one-to-one with the external viewing digits; each external viewing digit indicates the distance between the corresponding external viewing positioning mark and the far end of the light-transmitting duct, and each external viewing digit is normally displayed when viewed from the outside to the inside along the radial direction of the light-transmitting duct.

[0017] The above technical solution allows medical staff to observe the catheter from the outside, enabling them to more intuitively grasp the depth of the medical catheter inserted into the human body. This allows for cross-verification with the endoscopic digital markings observed through the endoscope, thus avoiding misoperation.

[0018] According to one embodiment of this application, the external digital identifier is formed facing forward on the outer wall of the light-transmitting duct; or, the external digital identifier is formed facing backward on the inner wall of the light-transmitting duct.

[0019] The above technical solution enables medical staff to directly observe the external digital markers in a normal display state from the outside of the translucent catheter, so as to intuitively grasp the depth of the translucent catheter inserted into the human body.

[0020] According to one embodiment of this application, the internal digital sign and the internal positioning sign are arranged near the distal end of the light-transmitting duct; the external digital sign and the external positioning sign are arranged near the proximal end of the light-transmitting duct.

[0021] Using the above technical solution, during the insertion of this medical catheter: first, an endoscope is inserted into the lumen of the translucent catheter. Then, with the assistance of the endoscope, the catheter is inserted sequentially through the nasal cavity, esophagus, and into the stomach or small intestine for visual placement. After pulling the endoscope back, the endoscopic digital marker located inside the body can be observed through the translucent catheter, and the position of the endoscopic positioning marker in the body can be observed through the translucent catheter, so as to directly know the insertion depth and distal position of the medical catheter in the stomach or intestine. The proximal end of the medical catheter is located outside the body, exposing the external digital marker, ensuring that medical personnel can directly observe the insertion depth of the medical catheter inside the body.

[0022] According to one embodiment of this application, the inner-view digital identifier and the outer-view digital identifier form a continuous digital scale.

[0023] According to one embodiment of this application, the internal positioning mark and / or external positioning mark is one or more of the following: a circular mark, a square mark, a pentagram mark, and a triangle mark.

[0024] According to one embodiment of this application, the external view digital identifier is located on the proximal side of the corresponding external view positioning identifier.

[0025] According to one embodiment of this application, when the external view digital identifier has at least two digits, the digits in the external view digital identifier are arranged in descending order along the axial direction from far to near.

[0026] According to one embodiment of this application, the ratio between the outer diameter of the light-transmitting conduit and the height of the inner-view digit marking is between 2 and 5.

[0027] The above technical solution helps to observe the endoscopic digital label through the endoscope.

[0028] According to one embodiment of this application, the medical catheter further includes a radiopaque line disposed in the light-transmitting catheter, the radiopaque line extending axially from the proximal end of the light-transmitting catheter to the distal end of the light-transmitting catheter, and the radiopaque line is located on one side of the marking component.

[0029] According to one embodiment of this application, the number of internal digit markers in the marking component is two sets, and the two sets of internal digit markers are located on opposite sides of the developing line.

[0030] According to one embodiment of this application, the translucent catheter is a single-lumen tube; the medical catheter also includes an end cap equipped with a sensor, the end cap being detachably installed at the distal end of the single-lumen tube, the sensor including a temperature sensor and / or a pressure sensor.

[0031] According to one embodiment of this application, the translucent catheter is a multi-lumen tube; the lumens of the translucent catheter include a supply cavity for insertion of the endoscope and a wire harness cavity with a sensor at the distal end; the sensor includes a temperature sensor and / or a pressure sensor. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram illustrating the engagement of a medical catheter and an endoscope according to one embodiment of this application;

[0034] Figure 2 A three-dimensional schematic diagram of a medical catheter according to the above embodiments of this application is shown;

[0035] Figure 3 A top view schematic diagram of a medical catheter according to the above embodiments of this application is shown;

[0036] Figure 4 A bottom view schematic diagram of a medical catheter according to the above embodiments of this application is shown;

[0037] Figure 5 A front view schematic diagram of a medical catheter according to the above embodiments of this application is shown;

[0038] Figure 6 A schematic diagram showing the endoscopic digital markers and endoscopic positioning markers observed from inside a medical catheter via an endoscope;

[0039] Figure 7 A first modified example of a medical catheter according to the above embodiments of this application is shown;

[0040] Figure 8 A second variation example of a medical catheter according to the above embodiments of this application is shown;

[0041] Figure 9 A third variation of the medical catheter according to the above embodiments of this application is shown.

[0042] Key reference numerals:

[0043] 1. Medical catheters; 10. Translucent catheters; 100. Cavities; 101. Supply cavities; 102. Wire harness cavities; 11. Single-lumen tubes; 12. Multi-lumen tubes; 20. Identification components; 21. Endoscopic digital identifiers; 22. Endoscopic positioning identifiers; 23. External digital identifiers; 24. External positioning identifiers; 30. Imaging lines; 40. Sensors; 50. End caps; 2. Endoscopes. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of the embodiments of this application, it should be noted that the terms "near" and "far" are relative positional relationships. When an operator operates a device to process a target object, the side of the device closer to the operator is "near", and the side closer to the target object is "far".

[0046] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0050] Given that existing nasogastric tubes often require insertion based on the experience of medical personnel, inexperienced staff may struggle to accurately control the insertion depth. A common approach to address this issue is to print graduations on the outside of the nasogastric tube. These graduations allow for estimation of the insertion depth and the distal end's position within the patient's body. However, after extensive testing, the inventors discovered that once inserted, the nasogastric tube may bend, twist, or even coil multiple times. In such cases, relying solely on external graduations is insufficient to accurately determine the distal end's position within the patient's body.

[0051] To address the aforementioned issues, this application provides a medical catheter that can solve the problem of inaccurate control during insertion of existing nasogastric tubes, reducing the reliance on the experience of medical personnel for accurate insertion.

[0052] During the invention process, the inventors discovered that in order for medical staff to determine the location of the distal end of the nasogastric tube, it is necessary not only to enable medical staff to find obvious reference points inside the human body, but also to clearly know the distal end of the endoscope (or other visual tool), the distal end of the nasogastric tube, and the relative positions of both and the reference points. Furthermore, the above-mentioned technical means should not affect the original functions of the endoscope and the nasogastric tube.

[0053] Specifically, please refer to Figures 1 to 9One embodiment of this application provides a medical catheter 1, which may include a translucent catheter 10 and a labeling assembly 20. The translucent catheter 10 has a cavity 100 extending axially. The labeling assembly 20 includes a plurality of endoscopic digit labels 21 arranged axially at intervals on the translucent catheter 10. Each endoscopic digit label 21 represents the distance between the corresponding endoscopic digit label 21 and the distal end of the translucent catheter 10, and each endoscopic digit label 21 is in a normal display state when viewed radially from the inside to the outside of the translucent catheter 10, for devices such as the endoscope 2 to directly observe the labeling content from inside the translucent catheter 10. It is understood that the normal display state mentioned in this application refers to the content being viewed, and the display in the observer's field of vision conforms to people's daily observation habits. Its display shape, angle, and order do not require the observer to make any intentional or unintentional conversion, such as... Figure 6 and Figure 7 As shown.

[0054] It should be noted that the medical catheter 1 mentioned in this application can be, but is not limited to, a nasogastric tube. Taking a nasogastric tube as an example, the distal insertion location of the medical catheter 1 is not limited to the small intestine; for example, the distal end of the medical catheter 1 can be sequentially pulled from the nasal cavity and esophagus to the stomach under the guidance of the endoscope 2; or, the distal end of the medical catheter 1 can also be pulled to the esophagus or duodenum, and the specific insertion location of the distal end of the medical catheter 1 can be determined according to actual needs. In addition, the medical catheter 1 can also be inserted into the body in the order of being pulled from the mouth, esophagus, stomach, duodenum to the small intestine.

[0055] In this way, the medical catheter 1 of this application can be inserted into the body in the order of being pulled from the nasal cavity, esophagus, stomach, duodenum to small intestine under the guidance of the endoscope 2. Medical staff can directly observe the endoscopic digital mark 21 on the translucent catheter 10 through the lens of the endoscope 2, and observe the position of the endoscopic digital mark 21 in the human body through the translucent catheter 10, thereby knowing the insertion depth and distal position of the medical catheter 1, thus achieving precise control of catheter insertion and greatly reducing the dependence on the medical staff's own experience.

[0056] For example, after the medical catheter 1 is sequentially pulled from the nasal cavity, esophagus, stomach, and duodenum into the small intestine, when the endoscopic number 21 with the value "25" is observed through the lens of the endoscope 2 at the duodenal papilla, it means that the distal end of the medical catheter 1 has been inserted into the correct position, and the endoscope 2 can be withdrawn from the medical catheter 1.

[0057] It is worth noting that the translucent catheter 10 mentioned in this application may be made of, but is not limited to, transparent materials such as polyurethane, TPU (thermoplastic polyurethane elastomer), silicone, or PEBAX (nylon elastomer). Furthermore, the distal end mentioned in this application refers to the end of the medical catheter 1 that is inserted into the human body; correspondingly, the proximal end mentioned later in this application refers to the end of the medical catheter 1 located outside the body closer to the operator.

[0058] More specifically, such as Figures 2 to 4 As shown, the marking component 20 may further include an internal viewing positioning mark 22 corresponding one-to-one with the internal viewing digital mark 21. The distance between each internal viewing positioning mark 22 and the distal end of the translucent catheter 10 is equal to the value represented by the corresponding internal viewing digital mark 21. In this way, the internal viewing positioning mark 22 can accurately mark the scale position indicated by the corresponding internal viewing digital mark 21, so that medical personnel can accurately know the insertion depth and distal position of the medical catheter 1, thereby achieving precise control of the intubation.

[0059] For example, such as Figures 2 to 5 As shown, the endoscopic digital label 21 can also be formed in reverse on the outer wall of the translucent conduit 10, that is, the endoscopic digital label 21 is formed in a mirror state on the outer wall of the translucent conduit 10, so that the endoscope 2 can still observe the normal display state of the value represented by the endoscopic digital label 21 from the inside through the translucent conduit 10, and observe the position of the endoscopic digital label 21 on the human body through the translucent conduit 10, so as to intuitively know the insertion depth and distal position of the medical catheter 1.

[0060] It is worth noting that in the first modified example of this application, such as Figure 7 As shown, the endoscopic digital label 21 is formed on the inner wall of the translucent conduit 10 in the forward direction. That is, the endoscopic digital label 21 is formed on the inner wall of the translucent conduit 10 in a normal display state, so that the endoscope 2 can directly observe the value represented by the endoscopic digital label 21 from inside the translucent conduit 10, and observe the position of the endoscopic digital label 21 on the human body through the translucent conduit 10, so as to directly know the insertion depth and distal position of the medical catheter 1.

[0061] It is understood that the internal numerals 21 formed in the opposite direction on the outer wall of the light-transmitting duct 10 are mirror images of the internal numerals 21 formed in the forward direction on the inner wall of the light-transmitting duct 10, so that the normally displayed numerals can be observed when the internal numerals 21 are observed from the inside to the outside along the radial direction of the light-transmitting duct 10.

[0062] According to the above embodiments of this application, as Figures 1 to 5As shown, the marking component 20 may further include a plurality of external viewing numerals 23 arranged axially at intervals on the translucent conduit 10 and external viewing positioning numerals 24 corresponding one-to-one with the external viewing numerals 23. Each external viewing numeral 23 represents the distance between the corresponding external viewing positioning numeral 24 and the distal end of the translucent conduit 10, and each external viewing numeral 23 is normally displayed when viewed from the outside to the inside along the radial direction of the translucent conduit 10, for medical personnel to observe from the outside of the translucent conduit 10, so that medical personnel can more intuitively grasp the depth of the medical conduit 1 inserted into the human body, thereby corroborating with the internal viewing numerals 21 observed by the endoscope 2 and avoiding misoperation.

[0063] For example, such as Figures 2 to 5 As shown, the external digital mark 23 is formed on the outer wall of the light-transmitting conduit 10 in the forward direction. That is, the external digital mark 23 is formed on the outer wall of the light-transmitting conduit 10 in the normal display state, so that medical staff can directly observe the value represented by the external digital mark 23 from the outside of the light-transmitting conduit 10, so as to intuitively grasp the depth of the light-transmitting conduit 10 inserted into the human body.

[0064] Alternatively, in the first modified example described above in this application, such as Figure 7 As shown, the external viewing number 23 can also be formed in reverse on the inner wall of the light-transmitting conduit 10, that is, the external viewing number 23 is formed in a mirror state on the inner wall of the light-transmitting conduit 10, so that medical staff can still observe the value represented by the external viewing number 23 through the light-transmitting conduit 10 from the outside, and thus intuitively grasp the insertion depth of the light-transmitting conduit 10. It can be understood that the external viewing number 23 formed in reverse on the inner wall of the light-transmitting conduit 10 is a mirror image of the external viewing number 23 formed in the forward direction on the outer wall of the light-transmitting conduit 10, so that the normally displayed number can be observed when observing the external viewing number 23 from the outside to the inside along the radial direction of the light-transmitting conduit 10.

[0065] Optionally, such as Figures 2 to 5 As shown, the endoscopic digital marker 21 and endoscopic positioning marker 22 are positioned near the distal end of the translucent catheter 10; the extrinsic digital marker 23 and extrinsic positioning marker 24 are positioned near the proximal end of the translucent catheter 10. Thus, during the insertion of the medical catheter 1: first, the endoscope 2 is inserted into the cavity 100 of the translucent catheter 10; then, with the assistance of the endoscope 2, the catheter is inserted sequentially through the nasal cavity, esophagus, and into the stomach or small intestine for visual placement. Pulling the endoscope 2 back allows observation of the endoscopic digital marker 21 located within the body through the translucent catheter 10, and observation of the position of the endoscopic positioning marker 22 through the translucent catheter 10, providing a direct visual indication of the insertion depth and distal position of the medical catheter 1 in the stomach or intestine. Since the proximal end of the medical catheter 1 is located outside the body, the extrinsic digital marker 23 is exposed, ensuring that medical personnel can directly observe the insertion depth of the medical catheter 1.

[0066] Optionally, such as Figure 2 and Figure 3 As shown, the inner-view digit marker 21 and the outer-view digit marker 23 form a continuous numerical scale, such that the formed numerical scale decreases sequentially from the proximal end to the distal end of the light-transmitting guide tube 10. For example, the starting scale of the outer-view digit marker 23 is "145", the ending scale is "40", and the step size is 10; the starting scale of the inner-view digit marker 21 is "30", the ending scale is "5", and the step size is 5. In other embodiments of this application, the starting and ending scales of the outer-view digit markers can be set as needed, and the distance between two adjacent outer-view digit markers is the step size. The distance between two adjacent outer-view digit markers can be a fixed value, can be set as needed, or can be set to a non-fixed value. The step size of the inner-view digit marker 21 can be set to a fixed value or a non-fixed value. It is understood that the unit of the internal viewing numeral 21 and the external viewing numeral 23 may be implemented as centimeters (cm). The unit may be indicated in all the numerals, or only in some of the numerals, or the unit may be indicated separately at the proximal end of the light-transmitting guide tube 10. This application will not elaborate on this further.

[0067] Optionally, such as Figure 3 As shown, the internal positioning mark 22 is implemented as a circular mark so that positioning can be performed through the center of the circular mark. It is understood that in other embodiments of this application, the internal positioning mark 22 may also be implemented as other positioning marks such as a triangle mark, a pentagram mark, a rhombus mark or a square mark, which will not be described in detail in this application.

[0068] It is worth noting that, such as Figure 3 As shown, the external positioning mark 24 can be implemented as a square mark or a circular mark so as to locate through the center of the square mark. Similarly, in other embodiments of this application, the external positioning mark 24 can also be implemented as other marks capable of positioning, such as a triangle mark or a pentagram mark, which will not be described in detail here.

[0069] In addition, to make it easier to distinguish the endoscopic positioning mark 22 and the extrinsic positioning mark 24, the size / area of ​​the endoscopic positioning mark 22 is smaller than that of the extrinsic positioning mark 24. This ensures that medical staff can directly observe the larger extrinsic positioning mark 24 while also ensuring that the endoscope 2 can fully observe the smaller endoscopic positioning mark 22. This allows medical staff to observe the smaller endoscopic positioning mark 22 using the image magnification function of the endoscope 2 or other display terminals.

[0070] Optionally, such as Figure 2 and Figure 3As shown, each endoscopic number 21 is located on the distal side of the corresponding endoscopic positioning mark 22. Thus, when the medical catheter 1 is inserted into the body, during the retraction of the endoscope 2 inserted into the cavity 100 of the translucent catheter 10, the endoscope 2 first observes the endoscopic number 21 and then observes the endoscopic positioning mark 22, so as to match the operator's observation habits.

[0071] Optionally, such as Figure 3 and Figure 4 As shown, when the internal numeral identifier 21 has at least two digits, the digits in the internal numeral identifier 21 are arranged in descending order along the axial direction from near to far. For example, as Figure 3 and Figure 4 As shown, when the endoscopic digital label 21 has two digits, the tens and units digits of the endoscopic digital label 21 are arranged from near to far along the axial direction. That is, the tens digit of the endoscopic digital label 21 is located between the units digit of the endoscopic digital label 21 and the corresponding endoscopic positioning label 22, so that medical staff can observe the value represented by the endoscopic digital label 21 through the endoscope 2, thus meeting the medical staff's need for quick and accurate reading.

[0072] Optionally, such as Figure 2 and Figure 3 As shown, each external visual number 23 is located on the proximal side of the corresponding external visual positioning mark 24, so that during the intubation process, the external visual positioning mark 24 is in a position closer to the human body than the corresponding external visual number 23, ensuring that the external visual number 23 corresponding to all external visual positioning marks 24 located outside the body will not be obstructed by the human body, and making it easy for the operator to directly observe the external visual number 23 corresponding to each external visual positioning mark 24 located outside the body.

[0073] Optionally, such as Figure 2 and Figure 3 As shown, when the external visual digit indicator 23 has at least two digits, the digits of the external visual digit indicator 23 are arranged in descending order along the axial direction from far to near. For example, when the external visual digit indicator 23 has three digits, the hundreds, tens, and units digits of the external visual digit indicator 23 are arranged along the axial direction from far to near, that is, the hundreds digit of the external visual digit indicator 23 is located on the side of the tens digit of the external visual digit indicator 23 closer to the corresponding external visual positioning indicator 24, and the units digit of the external visual digit indicator 23 is located on the side of the tens digit of the external visual digit indicator 23 further away from the corresponding external visual positioning indicator 24, which conforms to the reading habits of medical staff.

[0074] The inventors also discovered a method of inserting an endoscope as a liner into the nasogastric tube and inserting it into the body along with the tube. Internal viewing numerals are placed at the insertion point of the nasogastric tube, and these numerals are displayed radially from the inside out, appearing as normal markers. The position of the nasogastric tube is determined by observing and judging the location of these numerals through the endoscope within the nasogastric tube, and then by the length of the tube inserted into the body. However, in experiments, because the images are transmitted to an external monitor via the endoscope's camera, the inventors found that due to the numerous bends and complex colors within the digestive tract, the size and color of the scale settings significantly affect the doctor's ability to observe and judge the state and position of the nasogastric tube on the monitor. Furthermore, the original imaging lines and side openings must not be affected.

[0075] The inventors have undertaken extensive creative work in this regard. The ratio between the outer diameter of the light-transmitting conduit 10 and the height of the endoscopic numeral 21 is between 2 and 5. For example, if the outer diameter of the light-transmitting conduit 10 is typically implemented as 4.67 mm (corresponding to 14 Fr) or 5.33 mm (corresponding to 16 Fr), then the height of the endoscopic numeral 21 is implemented as 1.8 mm, which facilitates observation of the endoscopic numeral 21 through the endoscope 2. It is understood that, theoretically, the font size of the endoscopic numeral 21 should be within the field of view of the endoscope 2 lens, not exceeding the field of view at most, and at least clearly visible; and to ensure that the endoscope 2 can see clearly, the illumination of the endoscope 2 should be greater than or equal to 3000 Lux, and the color temperature should not exceed 6500 K, preferably 5000 K.

[0076] Furthermore, since the insertion part of the endoscope 2 is usually black, in order to avoid the color clash between the marking component 20 and the insertion part of the endoscope 2, the marking component 20 of this application is usually white or purple so that medical personnel can observe the marking component 20 on the translucent catheter 10.

[0077] According to the above embodiments of this application, the marking component 20 can be formed on the wall of the light-transmitting conduit 10 by, but is not limited to, screen printing. It is understood that in other embodiments of this application, the marking component 20 can also be formed on the wall of the light-transmitting conduit 10 using processes such as aerosol jet printing, flexographic printing, inkjet printing, electrochemical deposition, laser ablation, or photolithography; these methods will not be elaborated upon further in this application.

[0078] Optionally, such as Figure 5As shown, the medical catheter 1 also includes a radiopaque line 30 disposed on the translucent catheter 10. The radiopaque line 30 extends axially from the proximal end of the translucent catheter 10 to the distal end of the translucent catheter 10, and the radiopaque line 30 is located on one side of the marking component 20 so that the position of the translucent catheter 10 in the body can be displayed through the radiopaque line 30 under X-ray irradiation.

[0079] Optionally, such as Figures 2 to 5 As shown, the number of internal viewing digit markers 21 in the marking component 20 is two sets. The two sets of internal viewing digit markers 21 are located on opposite sides of the imaging line 30, so that the two sets of internal viewing digit markers 21 are located on opposite sides of the light-transmitting guide tube 10, for example... Figure 5 The left and right sides are shown so that the endoscopic digital label 21 can be observed without rotating the endoscope 2.

[0080] It is worth noting that, such as Figures 2 to 5 As shown, the identification component 20 also has two sets of internal positioning markers 22, which are arranged corresponding to the two sets of internal digital markers 21. Furthermore, the external digital markers 23 and external positioning markers 24 in the identification component 20 are each a set, to avoid visual interference when viewed from outside the light-transmitting guide tube 10. It is understood that in other examples of this application, the external digital markers 23 and external positioning markers 24 may also be two sets, which will not be elaborated upon here.

[0081] Furthermore, the translucent catheter 10 mentioned in this application can be implemented as a single-lumen tube 11 or a multi-lumen tube 12, as long as it has a cavity 100 for the insertion of the endoscope 2, and can also deliver nutrient solution or decompression through the cavity 100.

[0082] For example, in the second variation of this application, such as Figure 8 As shown, the translucent catheter 10 is implemented as a single-lumen tube 11. In this case, the medical catheter 1 may also include an end cap 50 equipped with a sensor 40, which is detachably installed at the distal end of the single-lumen tube 11. The sensor 40 may include a temperature sensor and / or a pressure sensor for wireless signal transmission. It is understood that the temperature sensor mentioned in this application can be used to detect temperature changes at the distal end of the translucent catheter 10 within the body in real time; the pressure sensor mentioned in this application can be used to detect pressure changes at the distal end of the translucent catheter 10 within the body, so that medical personnel can promptly detect abnormalities and prevent the patient's condition from deteriorating without timely intervention.

[0083] In the third variation example of this application, such as Figure 9As shown, the translucent conduit 10 is implemented as a multi-lumen tube 12; in this case, the lumen 100 of the translucent conduit 10 may include a supply lumen 101 for insertion of the endoscope 2 and a wire harness lumen 102 with a sensor 40 at its distal end. The sensor 40 may include a temperature sensor and / or a pressure sensor for signal transmission via wired transmission. It is understood that, in addition to the outer wall of the multi-lumen tube 12 of this application being provided with an identification component 20, the inner wall of the supply lumen 101 of the multi-lumen tube 12 of this application may also be provided with an identification component 20, which will not be described in detail here.

[0084] The technical features of the above embodiments can be combined without changing the basic principles of this application. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A medical catheter, characterized in that, include: A translucent catheter with a cavity extending along the axial direction; and The identification component includes a plurality of internal viewing digits arranged axially at intervals in the light-transmitting duct; each internal viewing digit represents the distance between the corresponding internal viewing digit and the distal end of the light-transmitting duct, and each internal viewing digit is in a normal display state when viewed radially from the inside to the outside of the light-transmitting duct for observation from the inside of the light-transmitting duct.

2. The medical catheter according to claim 1, characterized in that, The internal digital identifier is formed in the forward direction on the inner wall of the light-transmitting duct; or, the internal digital identifier is formed in the reverse direction on the outer wall of the light-transmitting duct.

3. The medical catheter according to claim 1 or 2, characterized in that, The identification component also includes an internal visual positioning identifier that corresponds one-to-one with the internal visual digital identifier, and the distance between each internal visual positioning identifier and the distal end of the light-transmitting duct is equal to the value represented by the corresponding internal visual digital identifier.

4. The medical catheter according to claim 3, characterized in that, Each of the aforementioned internal view digital identifiers is located on the far side of the corresponding internal view positioning identifier; When the internal visual digit identifier has at least two digits, the digits in the internal visual digit identifier are arranged in descending order along the axial direction from near to far.

5. The medical catheter according to claim 3, characterized in that, The marking component further includes a plurality of external viewing digit markings arranged axially at intervals on the light-transmitting duct and external viewing positioning markings corresponding one-to-one with the external viewing digit markings; each external viewing digit marking represents the distance between the corresponding external viewing positioning marking and the distal end of the light-transmitting duct, and each external viewing digit marking is normally displayed when viewed from the outside to the inside along the radial direction of the light-transmitting duct.

6. The medical catheter according to claim 5, characterized in that, The externally visible digital identifier is formed facing forward on the outer wall of the light-transmitting duct; or, the externally visible digital identifier is formed facing backward on the inner wall of the light-transmitting duct. The internal view digital identifier and the internal view positioning identifier are arranged near the distal end of the light-transmitting duct; the external view digital identifier and the external view positioning identifier are arranged near the proximal end of the light-transmitting duct. The internal positioning marker and / or the external positioning marker are one or more of the following: circular marker, square marker, pentagram marker, and triangle marker; The external view digital identifier is located on the proximal side of the corresponding external view positioning identifier; When the external view digital identifier has at least two digits, the digits in the external view digital identifier are arranged in descending order along the axial direction from far to near the ground; The ratio between the outer diameter of the light-transmitting conduit and the height of the endoscopic digital label is between 2 and 5.

7. The medical catheter according to claim 6, characterized in that, The internal and external digital identifiers form a continuous digital scale.

8. The medical catheter according to claim 1 or 2, characterized in that, The medical catheter also includes a radiopaque line disposed on the translucent catheter, the radiopaque line extending axially from the proximal end of the translucent catheter to the distal end of the translucent catheter, and the radiopaque line being located on one side of the marking component; The number of the internal visual digital identifiers in the identifier component is two sets, and the two sets of internal visual digital identifiers are located on opposite sides of the imaging line.

9. The medical catheter according to claim 1 or 2, characterized in that, The translucent catheter is a single-lumen tube; the medical catheter also includes an end cap equipped with a sensor, the end cap being detachably installed at the distal end of the single-lumen tube, the sensor including a temperature sensor and / or a pressure sensor.

10. The medical catheter according to claim 1 or 2, characterized in that, The light-transmitting conduit is a multi-lumen tube; the lumens of the light-transmitting conduit include a supply cavity and a wire harness cavity with a sensor at the distal end; the sensor includes a temperature sensor and / or a pressure sensor.

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