Auxiliary catheter for nasointestinal obstruction catheter and nasointestinal obstruction catheter kit

Abstract

The invention discloses an auxiliary catheter for a nasointestinal obstruction catheter and a nasointestinal obstruction catheter kit. The auxiliary catheter comprises a catheter body, the catheter body is provided with a first cavity formed in the length direction of the catheter body, the first cavity is matched with the nasointestinal obstruction catheter in appearance, and the inner diameter of the first cavity is larger than the outer diameter of the nasointestinal obstruction catheter. A stomach content suction hole is formed in the side wall of the tube body; the two ends of the pipe body are open ends. The auxiliary catheter for the nasointestinal obstruction catheter can be used as a gastrointestinal decompression tube and can also be used in cooperation with placement of the nasointestinal obstruction catheter, in the descending process of the nasointestinal obstruction catheter, the descending speed of the nasointestinal obstruction catheter can be increased, intestinal decompression or obstruction removal can be conducted more rapidly, and the catheter is more convenient to use. And the discomfort of the patient can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to an auxiliary catheter for a transnasal intestinal obstruction catheter and a transnasal intestinal obstruction catheter kit. Background Art

[0002] Intestinal obstruction refers to an acute abdominal disease in which the passage of intestinal contents is blocked. It is a common digestive disease in clinical practice and may occur in the small intestine or the large intestine. It is characterized by an acute onset and rapid progression. In severe cases, shock or even death may occur. The treatment principle of intestinal obstruction is to relieve the obstruction, restore intestinal patency, and correct the general condition. Therefore, gastrointestinal decompression is the main treatment principle for acute intestinal obstruction. By reducing the intestinal pressure, reducing the accumulation of gas and fluid in the obstructed intestinal tube, the local blood circulation can be restored in a timely manner, so as to achieve the treatment purpose. Gastrointestinal decompression can be achieved through a gastrointestinal decompression tube and / or a transnasal intestinal obstruction catheter. For acute intestinal obstruction, patients will first aspirate and decompress the gastric contents through a gastrointestinal decompression tube, and then further aspirate and decompress the intestine through a transnasal intestinal obstruction catheter.

[0003] The gastrointestinal decompression tube can drain the gas and liquid in the stomach through a negative pressure device. This treatment method has a good clinical effect on high-level intestinal obstruction. However, its disadvantage is that its length is relatively short, and the contents of the distal intestinal tube cannot be effectively drained, and the decompression effect is not complete. The condition often deteriorates during the treatment process and turns into surgical treatment. Prolonged indwelling may also cause nasogastric tube syndrome, and in severe cases, it may endanger life.

[0004] The transnasal intestinal obstruction catheter is characterized by a sufficient length. It can pass through the obstruction site and reach the distal end for continuous and effective decompression. It can also observe the intestinal patency and determine the contrast site by injecting contrast agent. Therefore, it well compensates for the weaknesses of the gastrointestinal decompression tube. The transnasal intestinal obstruction catheter can be placed deeper in the human intestine, and its function is not limited to aspirating gastric contents. The catheter advances into the proximal end of the human body obstruction along with intestinal peristalsis. While quickly aspirating the intestinal contents, it can reduce intestinal wall edema, improve local circulation, and reduce the absorption of toxins. The mechanism of using the transnasal intestinal obstruction catheter to treat intestinal obstruction can be summarized into the following three points: ① Utilizing the characteristic that the transnasal intestinal obstruction catheter follows the continuous peristalsis of the intestinal tube, continuous intestinal decompression can be carried out, so as to quickly and effectively improve the symptoms of intestinal obstruction. ② Quickly relieve the intestinal wall ischemia, necrosis, intestinal mucosa congestion and edema caused by high intestinal lumen pressure, and block the further deterioration of the condition. ③ Along with the improvement of the lumen pressure and intestinal wall blood circulation, the normal function of the intestine is gradually restored. However, the existing transnasal intestinal obstruction catheters still have the following defects: ①The nasal intestinal obstruction catheter can only reach the proximal end of the obstruction by relying on the peristalsis of the small intestine. Existing clinical data show that the speed of the nasal intestinal obstruction catheter advancing driven by intestinal peristalsis is very slow, with an average daily advancement distance of only about 10 cm. As a result, the nasal intestinal obstruction catheter takes a long time to reach the obstruction site for diagnosis and intervention, indirectly prolonging the patient's hospital stay and increasing the patient's economic burden; ②During the advancement of the nasal intestinal obstruction catheter in the human body, it continuously stimulates the nasopharynx, causing great discomfort to the patient; ③During the indwelling period of the nasal intestinal obstruction catheter, mucus generated by the patient due to pharyngeal irritation or the respiratory tract cannot be smoothly discharged from the pharynx, which has a great negative impact on the patient's breathing and comfort experience. Summary of the Invention

[0005] The present invention discloses an auxiliary catheter for a nasal intestinal obstruction catheter and a nasal intestinal obstruction catheter kit to solve the technical problem of slow downward movement of the nasal intestinal obstruction catheter in the prior art.

[0006] To solve the above problems, the present invention adopts the following technical solutions: In a first aspect, the present application provides an auxiliary catheter for a nasal intestinal obstruction catheter, comprising: A tube body having a first cavity disposed along its length direction, the first cavity being adapted to the outer shape of the nasal intestinal obstruction catheter, and the inner diameter of the first cavity being larger than the outer diameter of the nasal intestinal obstruction catheter; gastric content suction holes are provided on the side wall of the tube body; the distal end of the tube body is an open end; A first suction joint connected to the proximal end of the tube body, the first suction joint being communicated with the first cavity.

[0007] In a second aspect, the present application provides a nasal intestinal obstruction catheter kit, comprising a nasal intestinal obstruction catheter and the above-mentioned auxiliary catheter for a nasal intestinal obstruction catheter.

[0008] The technical solutions adopted by the present invention can achieve the following beneficial effects: An auxiliary catheter for a transnasal intestinal obstruction catheter proposed in this application can, when in use, first be used as a gastrointestinal decompression tube. The proximal end of the tube body is externally connected to a negative pressure device (for example, it can be connected to an external negative pressure device through an externally connected suction joint), and the gastric contents of the patient are aspirated through the gastric content suction holes provided on the side wall of the tube body. Furthermore, it can be used in conjunction with the insertion of the transnasal intestinal obstruction catheter. After the patient's gastric contents are aspirated, when it is necessary to further aspirate the intestinal contents using the transnasal intestinal obstruction catheter for intestinal aspiration decompression, when the transnasal intestinal obstruction catheter is inserted, since the shape of the first cavity is adapted to that of the transnasal intestinal obstruction catheter and the inner diameter of the first cavity is greater than the outer diameter of the transnasal intestinal obstruction catheter, the auxiliary catheter can provide a downward passage. The transnasal intestinal obstruction catheter directly passes through the first cavity of the auxiliary catheter and then descends through the continuous peristalsis of the intestine. During this process, since the transnasal intestinal obstruction catheter directly passes through the first cavity of the auxiliary catheter, the insertion time of this section of the path is greatly shortened; and during the downward movement of the transnasal intestinal obstruction catheter, since the auxiliary catheter is outside the transnasal intestinal obstruction catheter, the resistance generated by the transnasal intestinal obstruction catheter due to being squeezed by the digestive tract tissues (such as the squeezing of the transnasal intestinal obstruction catheter by the nasal cavity section or the pyloric sphincter) can be reduced, thereby the downward speed of the transnasal intestinal obstruction catheter can be increased, intestinal decompression or obstruction relief can be carried out more quickly, the patient's hospital stay can be reduced, and the economic burden on the patient can be alleviated; in addition, since the auxiliary catheter is outside the transnasal intestinal obstruction catheter, it will not further stimulate the patient's pharynx due to its downward movement, and the discomfort of the patient can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0010] Figure 1 is a schematic structural diagram of Embodiment 1 of this application; Figure 2 is Figure 1 the sectional view taken along A - A in Figure 3 is a schematic structural diagram of another embodiment in Embodiment 1 of this application; Figure 4 is Figure 3 the sectional view taken along B - B in Figure 5 is Figure 3 the sectional view taken along C - C in Figure 6 is a schematic structural diagram of yet another embodiment in Embodiment 1 of this application; Figure 7 is Figure 6 The sectional view of D-D in Figure 8 is Figure 6 The sectional view of E-E in Figure 9 is Figure 1 The schematic diagram of the sleeve connection between the auxiliary catheter and the nasogastric intestinal obstruction catheter in Figure 10 is Figure 3 The schematic diagram of the sleeve connection between the auxiliary catheter and the nasogastric intestinal obstruction catheter in Figure 11 is Figure 6 The schematic diagram of the sleeve connection between the auxiliary catheter and the nasogastric intestinal obstruction catheter in Figure 12 is the schematic diagram of another implementation manner in Embodiment 1 of the present application; Figure 13 is Figure 12 The sectional view of F-F in Figure 14 is Figure 12 The sectional view of G-G in Figure 15 is Figure 12 The sectional view of H-H in Figure 16 is Figure 12 The sectional view of I-I in Figure 17 is Figure 12 The schematic diagram of the sleeve connection between the auxiliary catheter and the nasogastric intestinal obstruction catheter in Figure 18 is the schematic diagram of other implementation manners in Embodiment 1 of the present application; Figure 19 is Figure 18 The sectional view of J-J in Figure 20 is Figure 18 The sectional view of K-K in Figure 21 is Figure 18 The sectional view of L-L in Figure 22 is Figure 18 The sectional view of M-M in Figure 23 is Figure 18 The schematic diagram of the sleeve connection between the auxiliary catheter and the nasogastric intestinal obstruction catheter.

[0011] In the figure: 10 - tube body, 101 - first tube body, 102 - second tube body; 20 - first suction joint; 30 - second suction joint; 40 - Gastric content aspiration hole; 50 - Pharyngeal mucus aspiration hole; 60 - First cavity; 70 - Second cavity; 80 - Transnasal intestinal obstruction catheter; 90 - First side tube; 100 - Third cavity; 110 - Third aspiration joint; 120 - Second side tube; 130 - First partition plate. Detailed implementation manners

[0012] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. 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 implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0013] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0014] In the embodiments of this application, "proximal end" and "distal end" refer to the relative distances of each component from the user in the usage environment. Among them, the end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end". The aforementioned user refers to the operator of the medical device, such as medical staff.

[0015] Embodiment 1: Please refer to Figure 1 - Figure 2 、 Figure 9 , an auxiliary catheter for a transnasal intestinal obstruction catheter, including a tube body 10. The tube body 10 has a first cavity 60 arranged along its length direction. The first cavity 60 is adapted to the outer shape of the transnasal intestinal obstruction catheter 80, and the inner diameter of the first cavity 60 is greater than the outer diameter of the transnasal intestinal obstruction catheter 80; a gastric content aspiration hole 40 communicating with the first cavity 60 is opened on the side wall of the tube body 10; both ends of the tube body 10 are open ends.

[0016] An auxiliary catheter for a nasal intestinal obstruction catheter proposed in this application, when in use, can first be used as a gastrointestinal decompression tube. The proximal end of the tube body 10 is externally connected to a negative pressure device (for example, it can be connected to an external negative pressure device through an externally connected suction joint), and the gastric contents of the patient are aspirated through the gastric content suction holes 40 provided on the side wall of the tube body 10. Furthermore, it can be used in cooperation with the insertion of the nasal intestinal obstruction catheter 80. After the patient has aspirated the gastric contents, when it is necessary to further aspirate the intestinal contents with the nasal intestinal obstruction catheter 80 for intestinal aspiration decompression, when the nasal intestinal obstruction catheter 80 is inserted, since the outer shape of the first cavity 60 is adapted to that of the nasal intestinal obstruction catheter 80 and the inner diameter of the first cavity 60 is larger than the outer diameter of the nasal intestinal obstruction catheter 80, the auxiliary catheter can provide a downward channel, and the nasal intestinal obstruction catheter 80 directly passes through the first cavity 60 of the auxiliary catheter and then descends through the continuous peristalsis of the intestine. During this process, since the nasal intestinal obstruction catheter 80 directly passes through the first cavity 60 of the auxiliary catheter, the insertion time of this section of the path is greatly shortened; and during the downward movement of the nasal intestinal obstruction catheter 80, since the auxiliary catheter is on the outside of the nasal intestinal obstruction catheter 80, the resistance generated by the nasal intestinal obstruction catheter 80 due to being squeezed by the digestive tract tissue (such as the squeezing of the nasal intestinal obstruction catheter 80 by the nasal cavity segment or the pyloric sphincter) can be reduced, and thus the downward speed of the nasal intestinal obstruction catheter 80 can be increased, the intestinal decompression or obstruction relief can be carried out more quickly, the hospitalization time of the patient can be reduced, and the economic burden of the patient can be alleviated; in addition, since the auxiliary catheter is on the outside of the nasal intestinal obstruction catheter 80, it will not further stimulate the pharynx of the nasal patient during its downward movement, and the discomfort of the patient can be reduced.

[0017] In some embodiments, the auxiliary catheter further includes a first suction joint 20 for connecting to an external negative pressure device. The first suction joint 20 is connected to the proximal end of the tube body 10, and the first suction joint 20 communicates with the first cavity 60. It can be understood that the provided first suction joint 20 can be used to connect an external negative pressure device, facilitating the subsequent aspiration of gastric contents.

[0018] In some embodiments, the first suction joint 20 is detachably or fixedly connected to the tube body 10; when the first suction joint 20 is fixedly connected to the tube body 10, the inner diameter of the first suction joint 20 is adapted to the outer shape of the nasogastric ileus catheter 80, and the inner diameter of the first suction joint 20 is greater than the outer diameter of the nasogastric ileus catheter 80. It can be understood that the connection mode between the tube body 10 and the first suction joint 20 can be set as a detachable connection mode or a fixed connection mode. If it is set as a fixed connection mode, when considering the placement of the auxiliary catheter in cooperation with the nasogastric ileus catheter 80, the nasogastric ileus catheter 80 needs to pass through the first suction joint 20 and the first cavity 60 in sequence. Therefore, the inner diameter of the first suction joint 20 needs to be set greater than the outer diameter of the nasogastric ileus catheter 80. However, since the first suction joint 20 does not enter the human body, its outer diameter does not need to be considered, as long as it can be adapted to the external negative pressure device and the tube body 10 and can complete the suction of gastric contents well. If it is set as a detachable connection mode, when the auxiliary catheter is required to cooperate with the nasogastric ileus catheter 80 for placement, the first suction joint 20 can be directly removed. Therefore, neither the inner diameter nor the outer diameter of the first suction joint 20 needs to be considered, as long as it can be adapted to the external negative pressure device and the tube body 10 and can complete the suction of gastric contents well.

[0019] In some embodiments, the first suction joint 20 is a tapered joint, and the first suction joint 20 and the tube body 10 are connected by snap connection. It can be understood that the detachable connection mode between the first suction joint 20 and the tube body 10 is not limited to the mode disclosed in this application, and other detachable connection modes can also be adopted, as long as it is convenient for disassembly and connection and can smoothly complete the suction of gastric contents.

[0020] Please refer to Figure 3 - Figure 5 、 Figure 10 , in some embodiments, the tube body 10 further includes a second cavity 70 arranged along its length direction; wherein, the first cavity 60 and the second cavity 70 are two independent cavities; the tube body 10 is provided with a pharyngeal mucus suction hole 50 communicating with the second cavity 70 on the side wall corresponding to the second cavity 70; The proximal side of the tube body 10 is also connected with a second suction joint 30 for connecting with an external negative pressure device, and the second suction joint 30 communicates with the second cavity 70. It can be understood that when a patient needs to perform aspiration with a nasal intestinal obstruction catheter 80 after aspirating gastric contents, the nasal intestinal obstruction catheter 80 descends through the channel provided by the first cavity 60. During the indwelling period of the auxiliary catheter, mucus generated by the patient due to pharyngeal irritation or the respiratory tract can be aspirated by connecting the second suction joint 30 to a negative pressure device to aspirate the pharyngeal mucus. The pharyngeal mucus is aspirated and discharged from the pharyngeal mucus aspiration hole 50, improving the comfort of the patient, and the patient's breathing will also be smoother. In addition, the opening positions of the gastric content aspiration hole 40 and the pharyngeal mucus aspiration hole 50 need to be adapted to the positions of human organs. For example, after the auxiliary catheter enters the human body, the opening position of the gastric content aspiration hole 40 is exactly the aspiration position of the gastric contents, and the opening position of the pharyngeal mucus aspiration hole 50 is also exactly the position of the human pharynx. For different patients, the distance from the pharynx to the stomach is different, and different models can be set as needed to suit different patients.

[0021] In some embodiments, the distal end of the second cavity 70 is located on the proximal side of the gastric content aspiration hole 40, and the distal end of the second cavity 70 is a closed end. It can be understood that from the position of the human organs, the distal end of the auxiliary catheter enters the stomach of the human body, and the purpose of setting the second cavity 70 is to aspirate pharyngeal mucus. Therefore, the distal end of the second cavity 70 can be closed before entering the stomach. In addition, when aspirating gastric contents, in order to achieve a better aspiration effect, the tube body 10 can be provided with a plurality of gastric content aspiration holes 40 in the circumferential direction at the position corresponding to the aspiration of gastric contents, which can be more convenient for aspirating gastric contents. If the second cavity 70 extends into the stomach, gastric content aspiration holes 40 cannot be provided at the position corresponding to the second cavity 70. Therefore, setting the distal end of the second cavity 70 as a closed end can be more convenient for circumferentially providing gastric content aspiration holes 40 at the position corresponding to the aspiration of gastric contents, and can be more convenient for aspirating gastric contents.

[0022] In some embodiments, a first side tube 90 is connected to the proximal side of the tube body 10. One end of the first side tube 90 is connected to the proximal end of the second cavity 70, and the other end of the first side tube 90 is connected to the second suction joint 30.

[0023] Please refer to Figure 6 - Figure 8 、 Figure 11 In some embodiments, the tube body 10 includes a first tube body 101 and a second tube body 102 connected to the first tube body 101 along the proximal-to-distal direction; wherein, the second cavity 70 is provided on the first tube body 101; The first cavity 60 extends from the proximal end of the first tube body 101 to the distal end of the second tube body 102, and the gastric content suction holes 40 are formed on the second tube body 102. It can be understood that by setting the tube body 10 as the first tube body 101 and the second tube body 102, the specific structures of the first tube body 101 and the second tube body 102 can be processed respectively, which is more convenient for processing. Then, the first tube body 101 and the second tube body 102 are connected, but it is necessary to ensure that the setting positions and dimensions of the first cavity 60 of the first tube body 101 and the first cavity 60 of the second tube body 102 are adapted. For the specific connection method, for example, heat fusion connection can be adopted.

[0024] In some embodiments, a plurality of gastric content suction holes 40 are formed on the second tube body 102 along its circumferential direction. It can be understood that the number of the gastric content suction holes 40 can be set as needed as long as a good suction effect can be achieved.

[0025] In some embodiments, the first tube body 101 divides the inner cavity of the first tube body 101 into a first cavity 60 and a second cavity 70 through a first partition plate 130. It can be understood that the first cavity 60 and the second cavity 70 are independent cavities and can be separated into two independent cavities through the first partition plate 130. Of course, through the co-extrusion molding process, the first tube body 101 can also be directly designed as a double-cavity structure to ensure the integrity and sealing of the first cavity 60 and the second cavity 70.

[0026] In some embodiments, the first tube body 101 and the first partition plate 130 are integrally formed. It can be understood that the first tube body 101 and the first partition plate 130 can be integrally formed, or the first partition plate 130 can be connected to the inner wall of the first tube body 101. As long as the inner cavity of the first tube body 101 can be divided into two independent cavities, namely the first cavity 60 and the second cavity 70, it is satisfied.

[0027] In some embodiments, the first partition plate 130 is an arc-shaped plate. It can be understood that the shape of the first partition plate 130 is not limited by this application. The first partition plate 130 can be of any shape as long as it can divide the inner cavity of the first tube body 10 into two independent cavities that meet the usage requirements.

[0028] Please refer to Figure 12 - Figure 17, in some embodiments, the tube body 10 further includes a third cavity 100 independently provided along its length direction; the distal end of the third cavity 100 is a closed end, and the gastric content suction hole 40 is opened on the side wall of the tube body 10 corresponding to the position of the third cavity 100; a third suction joint 110 for connecting with an external negative pressure device is further connected to the proximal side of the tube body 10, and the third suction joint 110 communicates with the third cavity 100. It can be understood that a separate cavity is provided for the suction of gastric contents, and during the insertion process of the nasogastric intestinal obstruction catheter 80 and during placement, the gastric contents can also be aspirated as needed. After the patient undergoes the initial aspiration of gastric contents, when the nasogastric intestinal obstruction catheter 80 needs to be used for aspiration again, the nasogastric intestinal obstruction catheter 80 descends through the channel provided by the first cavity 60. During the indwelling period of the auxiliary catheter, the mucus generated by the patient due to pharyngeal irritation or the respiratory tract can be aspirated by connecting the second suction joint 30 to an external negative pressure device. The pharyngeal mucus is aspirated and discharged from the pharyngeal mucus suction hole 50, improving the comfort of the patient and making the patient's breathing smoother; and the gastric contents can also be aspirated by connecting the third suction joint 110 to an external negative pressure device, and the gastric contents are aspirated and discharged from the gastric content suction hole 40. In addition, the opening positions of the gastric content suction hole 40 and the pharyngeal mucus suction hole 50 need to be adapted to the positions of human organs. For example, after the auxiliary catheter enters the human body, the opening position of the gastric content suction hole 40 is exactly the suction position of the gastric contents, and the opening position of the pharyngeal mucus suction hole 50 is also exactly the position of the human pharynx. For different patients, the distance from the pharynx to the stomach is different, and different models can be set as needed to suit different patients.

[0029] In some embodiments, a second side tube 120 is connected to the proximal side of the tube body 10. One end of the second side tube 120 is connected to the proximal end of the third cavity 100, and the other end of the second side tube 120 is connected to the third suction joint 110.

[0030] Please refer to Figure 18 - Figure 23 , in some embodiments, the tube body includes a first tube body 101 and a second tube body 102 connected to the first tube body 101 along the proximal-to-distal direction; wherein, the second cavity 70 is provided on the first tube body; The first cavity 60 and the third cavity 100 both extend from the proximal end of the first tube body 101 to the distal end of the second tube body 102, and the gastric content suction hole 40 is opened on the second tube body 102. It can be understood that by setting the tube body 10 as the first tube body 101 and the second tube body 102, the specific structures of the first tube body 101 and the second tube body 102 can be processed respectively, which is more convenient for processing. Then, the first tube body 101 and the second tube body 102 are connected, but it is necessary to ensure that the setting positions and dimensions of the first cavity 60 of the first tube body 101 and the first cavity 60 of the second tube body 102 are both adapted, and it is necessary to ensure that the setting positions and dimensions of the third cavity 100 of the first tube body 101 and the third cavity 100 of the second tube body 102 are both adapted; for the specific connection method, for example, hot melt connection can be adopted.

[0031] In some embodiments, the first tube body 101 is integrally formed with an overall structure having three independent chambers, namely the first cavity 60, the second cavity 70 and the third cavity 100, by a coextrusion molding process; the second tube body 102 is integrally formed with an overall structure having two independent chambers, namely the first cavity 60 and the third cavity 100, by a coextrusion molding process; and the setting position and dimensions of the first cavity 60 on the first tube body 60 are both adapted to those of the first cavity 60 on the second tube body 102, and the setting position and dimensions of the third cavity 100 on the first tube body 101 are both adapted to those of the third cavity 100 on the second tube body 102. Of course, it is also possible to separate the first tube body 101 into three independent chambers, namely the first cavity 60, the second cavity 70 and the third cavity 100, by arranging a partition in the inner cavity of the first tube body 101, and separate the second tube body 102 into two independent chambers, namely the first cavity 60 and the third cavity 100, by arranging a partition in the inner cavity of the second tube body 102.

[0032] In some embodiments, the inner diameter of the first cavity 60 is 0.2 - 0.8 mm larger than the outer diameter of the nasogastric intestinal obstruction catheter 80. It can be understood that after the patient undergoes gastric content suction and then needs to perform suction with the nasogastric intestinal obstruction catheter 80, the nasogastric intestinal obstruction catheter 80 descends through the channel provided by the first cavity 60. Designing the inner diameter of the first cavity 60 to be 0.2 - 0.8 mm larger than the outer diameter of the nasogastric intestinal obstruction catheter 80 is to enable the nasogastric intestinal obstruction catheter 80 to descend more smoothly and quickly.

[0033] In some embodiments, when the auxiliary catheter is inserted into the human body, the distal end of the auxiliary catheter passes through the pylorus of the human body. It can be understood that after the nasogastric intestinal obstruction catheter 80 enters the gastric cavity, it needs to pass through the pylorus and enter the duodenum. Designing the length of the auxiliary catheter such that its distal end passes through the pylorus of the human body can enable the nasogastric intestinal obstruction catheter 80 to quickly pass through the pylorus through the channel provided by the first cavity 60 of the auxiliary catheter, and thus quickly complete catheter placement.

[0034] In some embodiments, the material of the auxiliary catheter includes any one of silicone, polyvinyl chloride, polyurethane, polyether amide, and polytetrafluoroethylene. It can be understood that the material of the auxiliary catheter is not limited to the materials disclosed in the present application. The material of the auxiliary catheter can also be a composite material composed of a polymer matrix material and a metal reinforcing wire; the polymer matrix material is selected from any one or any combination of silicone, polyvinyl chloride, polyurethane, polyether amide, and polytetrafluoroethylene; the metal reinforcing wire includes stainless steel wire and / or nitinol wire. For the selection of the material of the auxiliary catheter, first, a medical material needs to be selected, and the performance of the material and the comfort of the patient also need to be fully considered during the design and manufacturing process. It is necessary to ensure biocompatibility, softness, and durability to improve the treatment effect and safety. The material of the auxiliary catheter can be the same as that of the transnasal intestinal obstruction catheter 80.

[0035] In some embodiments, a hydrophilic coating is applied to the inner wall of the first cavity 60 of the tube body 10. After being wetted, the hydrophilic coating can play a lubricating role. When used in conjunction with the transnasal intestinal obstruction catheter 80, it can overcome the frictional resistance between the outer wall of the transnasal intestinal obstruction catheter 80 and the inner wall of the tube body 10, enabling the transnasal intestinal obstruction catheter 80 to descend more smoothly and quickly. For the selection of the hydrophilic coating material, for example, PVP, hyaluronic acid coating, or PSBMA coating can be selected.

[0036] In some embodiments, silicone oil or paraffin oil is applied to the inner wall of the first cavity 60 of the auxiliary catheter tube body 10. The silicone oil or paraffin oil applied to the inner wall of the first cavity 60 of the tube body 10 can play a lubricating role. When used in conjunction with the transnasal intestinal obstruction catheter 80, it can overcome the frictional resistance between the outer wall of the transnasal intestinal obstruction catheter 80 and the inner wall of the tube body 10, enabling the transnasal intestinal obstruction catheter 80 to descend more smoothly and quickly.

[0037] Example 2: Please refer to Figure 9 - Figure 11 , a transnasal intestinal obstruction catheter kit, including a transnasal intestinal obstruction catheter 80 and the auxiliary catheter for the transnasal intestinal obstruction catheter in Example 1; when the transnasal intestinal obstruction catheter 80 is inserted, the transnasal intestinal obstruction catheter 80 enters from the proximal end of the first cavity 60 and extends out from the distal end of the first cavity 60. It can be understood that if the first suction joint 20 and the tube body 10 are fixedly connected, the transnasal intestinal obstruction catheter 80 needs to pass through the first suction joint 20 and the first cavity 60 in sequence. The transnasal intestinal obstruction catheter 80 can adopt the structure in the prior art and can be used in cooperation with the auxiliary catheter in the present application.

[0038] In some embodiments, a hydrophilic coating is applied to the outer wall of the nasal intestinal obstruction catheter 80. It can be understood that applying a hydrophilic coating to the inner wall of the first cavity 60 of the tube body 10 and applying a hydrophilic coating to the outer wall of the nasal intestinal obstruction catheter 80 are both for increasing the lubricating effect. The two can be coated with a hydrophilic coating simultaneously, or either one can be coated, and both can play a role in overcoming the frictional resistance between the outer wall of the nasal intestinal obstruction catheter 80 and the inner wall of the tube body 10. For the selection of the hydrophilic coating material, for example, PVP, hyaluronic acid coating or PSBMA coating can be selected.

[0039] In some embodiments, silicone oil or paraffin oil is applied to the outer wall of the nasal intestinal obstruction catheter 80. It can be understood that applying silicone oil or paraffin oil to the inner wall of the first cavity 60 of the tube body 10 and applying silicone oil or paraffin oil to the outer wall of the nasal intestinal obstruction catheter 80 are both for increasing the lubricating effect. The two can be coated with silicone oil or paraffin oil simultaneously, or either one can be coated, and both can play a role in overcoming the frictional resistance between the outer wall of the nasal intestinal obstruction catheter 80 and the inner wall of the tube body 10.

[0040] A nasal intestinal obstruction catheter kit proposed in this application includes the auxiliary catheter for the nasal intestinal obstruction catheter in Embodiment 1. When in use, first, the auxiliary catheter can be used as a gastrointestinal decompression tube. The auxiliary catheter is externally connected to a negative pressure device, and gastric contents of the patient are aspirated through the gastric content aspiration holes 40 formed on the side wall of the tube body 10. After the patient's gastric contents are aspirated, when it is necessary to further aspirate intestinal contents using the nasal intestinal obstruction catheter 80 for intestinal aspiration and decompression, when the nasal intestinal obstruction catheter 80 is inserted, since the outer shape of the first cavity 60 is adapted to that of the nasal intestinal obstruction catheter 80 and the inner diameter of the first cavity 60 is larger than the outer diameter of the nasal intestinal obstruction catheter 80, the first cavity 60 of the auxiliary catheter can provide a downward channel. The nasal intestinal obstruction catheter 80 directly passes through the first cavity 60 of the auxiliary catheter and then descends through the continuous peristalsis of the intestine. During this process, since the nasal intestinal obstruction catheter 80 directly passes through the first cavity 60 of the auxiliary catheter, the insertion time of this section of the path is greatly shortened. And during the downward movement of the nasal intestinal obstruction catheter 80, since the auxiliary catheter is outside the nasal intestinal obstruction catheter 80, the resistance generated by the nasal intestinal obstruction catheter 80 due to being squeezed by digestive tract tissues (such as the squeezing of the nasal intestinal obstruction catheter 80 by the nasal cavity segment or the pyloric sphincter) can be reduced. Furthermore, the downward speed of the nasal intestinal obstruction catheter 80 can be increased, intestinal decompression or obstruction relief can be carried out more quickly, the hospitalization time of the patient can be reduced, and the economic burden of the patient can be alleviated. In addition, since the auxiliary catheter is outside the nasal intestinal obstruction catheter 80, it will not further stimulate the patient's pharynx during its downward movement, and the discomfort of the patient can be reduced. Moreover, during the indwelling period of the auxiliary catheter, mucus generated by the patient due to pharyngeal irritation or the respiratory tract can be aspirated by externally connecting the second aspiration joint 30 to a negative pressure device for aspirating pharyngeal mucus. The pharyngeal mucus is aspirated and discharged from the pharyngeal mucus aspiration holes 50, which can improve the comfort of the patient and the patient's breathing will be smoother.

[0041] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0042] In addition, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0043] As described above, the foregoing are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. An auxiliary catheter for a nasal intestinal obstruction catheter, characterized in that, It includes a tube body which has a first cavity arranged along its length direction. The first cavity is adapted to the outer shape of the nasogastric intestinal obstruction catheter, and the inner diameter of the first cavity is larger than the outer diameter of the nasogastric intestinal obstruction catheter. There are gastric content suction holes opened on the side wall of the tube body. Both ends of the tube body are open ends.

2. The auxiliary catheter for a nasal intestinal obstruction catheter according to claim 1, wherein The auxiliary catheter further includes a first suction joint for connecting with an external negative pressure device. The first suction joint is connected to the proximal end of the tube body, and the first suction joint communicates with the first cavity.

3. The auxiliary catheter for a nasal intestinal obstruction catheter according to claim 2, characterized in that, The first suction joint is detachably or fixedly connected to the tube body; When the first suction joint is fixedly connected to the tube body, the inner diameter of the first suction joint is adapted to the outer shape of the nasogastric intestinal obstruction catheter, and the inner diameter of the first suction joint is larger than the outer diameter of the nasogastric intestinal obstruction catheter.

4. The auxiliary catheter for a nasal intestinal obstruction catheter according to claim 3, characterized in that, The tube body further includes a second cavity arranged along its length direction; wherein, The first cavity and the second cavity are two independent cavities; The distal end of the second cavity is located on the proximal side of the gastric content suction hole, and the distal end of the second cavity is a closed end; The tube body is provided with pharyngeal mucus suction holes on the side wall corresponding to the second cavity; The proximal side of the tube body is also connected with a second suction joint for connecting with an external negative pressure device. The second suction joint communicates with the second cavity.

5. The auxiliary catheter for a nasal intestinal obstruction catheter according to claim 4, characterized in that, The tube body includes a first tube body and a second tube body connected to the first tube body along the direction from the proximal end to the distal end; wherein, The second cavity is arranged on the first tube body; The first cavity extends from the proximal end of the first tube body to the distal end of the second tube body, and the gastric content suction holes are opened on the second tube body.

6. The auxiliary catheter for a nasal intestinal obstruction catheter according to claim 5, characterized in that, The first tube body divides the inner cavity of the first tube body into the first cavity and the second cavity through a first partition plate.

7. The auxiliary catheter for a nasal intestinal obstruction catheter according to claim 4, characterized in that, The tube body further includes a third cavity independently arranged along its length direction; wherein, The distal end of the third cavity is a closed end; The gastric content suction holes are opened on the side wall of the tube body corresponding to the third cavity; The proximal side of the tube body is also connected with a third suction joint for connecting with an external negative pressure device. The third suction joint communicates with the third cavity.

8. The auxiliary catheter for a nasal intestinal obstruction catheter according to claim 7, characterized in that, The tube body includes a first tube body and a second tube body connected to the first tube body along the direction from the proximal end to the distal end; wherein, The second cavity is arranged on the first tube body; Both the first cavity and the third cavity extend from the proximal end of the first tube body to the distal end of the second tube body, and the gastric content suction holes are opened on the second tube body.

9. The auxiliary catheter for a nasal intestinal obstruction catheter according to claim 8, characterized in that, The first tube body integrally forms an overall structure with three independent chambers, namely the first cavity, the second cavity and the third cavity, through a co-extrusion molding process; the second tube body integrally forms an overall structure with two independent chambers, namely the first cavity and the third cavity, through a co-extrusion molding process; and the arrangement position and size of the first cavity of the first tube body are both adapted to those of the first cavity of the second tube body, and the arrangement position and size of the third cavity of the first tube body are both adapted to those of the third cavity of the second tube body; and / or, the inner diameter of the first cavity is 0.2 - 0.8 mm larger than the outer diameter of the nasogastric intestinal obstruction catheter; and / or, when the auxiliary catheter is placed into the human body, the distal end of the auxiliary catheter passes through the pylorus of the human body; and / or, a hydrophilic coating is coated on the inner wall of the first cavity of the tube body; And / or, silicone oil or paraffin oil is coated on the inner wall of the first cavity of the tube body; And / or, the material of the auxiliary catheter includes any one of silica gel, polyvinyl chloride, polyurethane, polyether amide, and polytetrafluoroethylene.

10. A nasal intestinal obstruction catheter kit, comprising a nasal intestinal obstruction catheter, characterized in that, It further includes the auxiliary catheter for a nasal intestinal obstruction catheter according to any one of claims 1-9; when the nasal intestinal obstruction catheter is inserted, the nasal intestinal obstruction catheter enters from the proximal end of the first cavity and extends out from the distal end of the first cavity.

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