Nasointestinal tube convenient to embed

Abstract

The utility model belongs to the field of medical instruments, and relates to a nasointestinal tube convenient to place. Comprising a bendable catheter, the front end of the catheter is provided with an opening, the front end opening and the side wall of the catheter are coated with a soluble sol layer, the rear end of the catheter is communicated with a main cavity and a side cavity, a guide wire is arranged in the catheter, the rear end of the guide wire extends out of the catheter and the main cavity and is connected with a guide wire fixator, and the front end of the guide wire is connected with a connecting pipe thicker than the guide wire. And fluff is connected to the circumferential wall of the connecting pipe. The front end of the connecting pipe is further connected with a metal ball. After the nasointestinal tube is placed into the stomach, under the combined action of gastrointestinal motility and the special structure of the front end of the nasointestinal tube, the front end of the nasointestinal tube is automatically placed into the intestinal tract through the pylorus, the success rate of tube placement is improved, and a large amount of tube placement time of medical staff is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical apparatus and instruments, and relates to a nasojejunal tube convenient to place. BACKGROUND

[0002] Clinically, severe patients are a high-risk group of nutritional risk. Due to various factors such as drug use (such as sedation analgesia / vessel active drug), mechanical ventilation, disease, and the like, severe patients have different degrees of gastric motility decline. Enteral nutrition (EN) is superior to parenteral nutrition in terms of reducing infection incidence, shortening hospitalization time, reducing mortality, and reducing medical costs, and is the preferred nutritional support method for critically ill patients. Among them, jejunum nutrition can reduce the incidence of complications such as feeding intolerance and aspiration pneumonia, improve the efficiency of enteral nutrition, and post-pyloric feeding containing jejunum nutrition is often used as the preferred nutritional support pathway for critically ill patients with gastric feeding intolerance. At present, nasojejunal nutrition has become one of the main nutritional support treatment methods for critically ill patients. Domestic and foreign enteral nutrition guidelines give comprehensive guidance and recommendations for the practice of enteral nutrition, and the recommended opinion is: nasojejunal nutrition is recommended for patients with gastric feeding intolerance, aspiration risk, gastric outflow obstruction, and gastroparesis.

[0003] The mode of nasojejunal nutrition feeding is to place the front end of the nasojejunal tube through the pylorus into the duodenum or jejunum segment of the patient. The nasojejunal tubes currently sold on the market mainly include: spiral nasojejunal tube, single-lumen nasojejunal tube, double-lumen nasojejunal tube, triple-lumen nasojejunal tube, and liquid capsule jejunum tube; the placement modes include: blind insertion of nasojejunal tube, ultrasonic guidance of nasojejunal tube, and electromagnetic navigation of nasojejunal tube.

[0004] The key to nasojejunal nutrition feeding is to successfully place the front end of the nasojejunal tube through the pylorus into the duodenum or jejunum. The current nasojejunal tube placement method is relatively mature, but there are still many areas that need to be improved in the nasojejunal tube product and the tube placement process, mainly in:

[0005] Blind insertion needs to manually place the front end of the nasojejunal tube into the stomach, and then wait for the gastric peristalsis to push the nasojejunal tube through the pylorus into the intestinal tract. The narrow anatomical structure of the pylorus determines the difficulty of passing through the pylorus, and a large amount of time of medical staff is consumed for successful placement. Blind insertion of the nasojejunal tube is time-consuming, has a low success rate, and needs X-ray positioning confirmation before feeding, which causes nutritional interruption of the patient during the period.

[0006] 2. Currently, there are auxiliary tube placements such as B-ultrasound and electromagnetic navigation, but the supporting equipment is expensive and has high technical requirements for the users.

[0007] 3, The nasal intestinal tube on the market at present is designed with an oval shape with the front end sealed in order not to damage the mucosa of the gastrointestinal tract during the catheterization process, and the opening is located on the side wall of the tube body. This design maximizes the reduction of mucosal damage of the gastrointestinal tract caused by intubation, but has the disadvantage of small opening and large resistance, increasing the difficulty of nutrient solution and drug outflow. Therefore, most nasal intestinal tubes in clinical use are prone to cause tube blockage, and nursing personnel need to maintain the tube by flushing it in time, and the tube needs to be dissolved or replaced if it is blocked.

[0008] 4, In order to be placed more smoothly and have a higher success rate, the tube diameter of the nasal intestinal tube on the market at present is relatively small compared with a stomach tube, and liquid diet prepared at home is difficult to inject, and only enteral nutrition preparations can be used for infusion under the use of an enteral nutrition pump. The cost is high, and the use scene is limited in ordinary wards. Practical new type content

[0009] The technical problem to be solved by the present application is to provide a nasal intestinal tube which is convenient to place.

[0010] A nasal intestinal tube convenient to place, comprising a catheter which can be bent, an opening at the front end of the catheter, a layer of soluble colloid layer coated on the opening at the front end of the catheter and the side wall, a main cavity and a side cavity communicated with the rear end of the catheter, a guide wire inside the catheter, the rear end of the guide wire extending out of the catheter and connected with the main cavity and a guide wire fixator, a connecting tube connected with the front end of the guide wire, the connecting tube being thicker than the guide wire, and a plurality of villi connected with the circumferential wall of the connecting tube.

[0011] The connecting tube can be a silica gel tube.

[0012] One end of the villi is connected with the connecting tube, and the other end is inclined to the rear end of the guide wire.

[0013] The front end of the catheter has a side hole on the side wall.

[0014] As a further optimization, the front end of the connecting tube is further connected with a metal ball.

[0015] The villi can be animal villi or chemical fibers such as polyester.

[0016] The length of the entire nasal intestinal tube is between 125-155 cm, and the outer diameter of the catheter is between 4-20 Fr. From the front end of the catheter as a starting point, there are scale lines at 40-55 cm and scale lines at 80-130 cm on the outer wall of the catheter. The outer wall of the catheter has a protruding safety column at 130 cm, which prevents the catheter from advancing into the intestine too deeply by itself. When the safety column reaches the nasal cavity, it can prevent the catheter from continuing to advance under the peristalsis of the gastrointestinal tract.

[0017] The soluble colloid layer can adopt protein colloid or starch colloid, such as gelatin, agar. Similar to the effect of a medicine capsule, when the front end of the catheter is inserted into the stomach from the nasal cavity, the mucosa is protected from being injured. After the front end of the catheter is placed in the stomach for a period of time, the soluble colloid layer is dissolved, and the front end of the guide wire fixing device exposed outside the nasal cavity is pushed forward, so that the connecting tube and the villi on the connecting tube are extended out of the catheter. Due to the existence of a large number of villi, the contact with the stomach wall is increased. Moreover, the direction of the villi is backward, and when the stomach peristalsis occurs, a forward force is easily generated to push the catheter to move towards the pylorus.

[0018] As a further optimization, the front end of the connecting tube is connected with a metal ball, the density of the metal ball is greater than that of gastric acid and the catheter, and under the gravity of the metal ball, the catheter is further helped to move towards the pylorus.

[0019] The beneficial effects of the utility model lie in:

[0020] After the nasojejunal tube is placed in the stomach, under the joint action of the stomach and intestinal peristalsis and the special structure of the front end of the nasojejunal tube, the front end of the nasojejunal tube is placed into the intestinal tract through the pylorus. The advantage is to improve the success rate of tube placement and save a large amount of tube placement time of medical staff.

[0021] Through the soluble colloid layer, the mucosa of the gastrointestinal tract is protected from being injured when the nasojejunal tube is placed, and at the same time, the opening is in the front end, and the occurrence of the tube blocking event is reduced.

[0022] Due to the increased force between the catheter and the stomach wall, the catheter diameter can be appropriately increased. In addition to the enteral nutrition preparation being infused under the use of an enteral nutrition pump, a self-made liquid diet can also be injected at home, and postpyloric feeding can also be realized in an ordinary ward lacking a nutrition pump. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The utility model discloses a whole structure schematic diagram.

[0024] Figure 2 The utility model discloses a catheter partial structure schematic diagram.

[0025] Figure 3 The utility model discloses a catheter front end remains in duodenum or rear end's jejunum schematic diagram.

[0026] Wherein, 1-catheter, 2-guide wire, 3-side hole, 4-metal ball, 5-connecting tube, 6-villus, 7-soluble colloid layer, 8-main cavity, 9-side cavity, 10-guide wire fixing device, 11-safety column. DETAILED DESCRIPTION

[0027] As Figure 1As shown in the figure, a nasojejunal tube for easy insertion comprises a bendable catheter 1, an opening at the front end of the catheter, a soluble gel layer 7 covering the opening at the front end of the catheter and the side wall, a main cavity 8 and a side cavity 9 connected to the rear end of the catheter, and a guide wire 2 inside the catheter, the rear end of the guide wire extending out of the catheter and connected to the guide wire fixer 10.

[0028] As shown in the figure, the front end of the guide wire 2 is connected to a connecting tube 5 thicker than the guide wire, and the circumference wall of the connecting tube 5 is connected to the fluff 6. Figure 2

[0029] The connecting tube 5 can be a silica gel tube.

[0030] One end of the fluff is connected to the connecting tube 5, and the other end is inclined to the rear end of the guide wire.

[0031] The front end of the catheter 1 has a side hole 3.

[0032] As a further optimization, the front end of the connecting tube 5 is also connected to the metal ball 4.

[0033] The soluble gel layer has the technical requirements that the front end surface of the soluble gel layer is smooth, maintains the state during the insertion process and the first 5 minutes, and is well combined with the front end of the catheter without falling off. Under the action of the stomach temperature and gastric juice, the soluble gel layer falls off or dissolves about 20 minutes to expose the front end ball and the tube opening.

[0034] The length of the whole nasojejunal tube is between 125-155cm, and the outer diameter of the catheter is between 4-20Fr. From the front end of the catheter as the starting point, the outer wall of the catheter has scale lines at 40-55cm and 80-130cm. The outer wall of the catheter also has a protruding safety column 11 at 130cm, which prevents the catheter from passing through the pylorus and entering the intestine too deeply. When the safety column reaches the nasal cavity, it can prevent the catheter from continuing to advance under the peristalsis of the stomach and intestines.

[0035] The catheter is made of silica gel material. The catheter is stored in an acidic solution with a pH value of 3.0 at 50 degrees Celsius for 30 days and in an alkaline solution with a pH value of 7.5 at 50 degrees Celsius for 30 days, and the physical and chemical systems are stable. The tube body is not folded, broken or corroded in a highly simulated model for one month.

[0036] The specific operation steps of the nasojejunal tube are as follows:

[0037] 1, The difficulty of nasojejunal tube intubation is from the stomach to the pylorus and into the intestine. The nasojejunal tube of the utility model is first inserted into the stomach from the nasal cavity, and a small amount of gas is injected from the tail side cavity according to the conventional method, the gas comes out from the front side hole 3, and the nursing staff determines that the front end of the nasojejunal tube of the utility model is in the stomach through auscultation (air over water sound). ​

[0038] 2, wait for 20 minutes or so, until the soluble colloid layer 7 dissolved, metal sphere 4 and the front end of the catheter exposed to the stomach.

[0039] 3, push the rear end of the guide wire holder, under the action of the guide wire, its front end of the metal ball, connecting tube, villi are pushed out of the catheter port, exposed to the stomach; under the action of the gravity of the metal ball and the gastrointestinal peristalsis and villi segment produce greater friction force, its front end automatically move to the pylorus.

[0040] 4, the tube body driven by the metal ball, villi through the pylorus, into the duodenum or jejunum, to achieve its goal of automatically placing the front end of the nasojejunal tube into the pylorus.

[0041] 5, the front end of the catheter to the duodenum or jejunum position (judgment index: the length of the catheter outside the mark, the length of the placement can be judged from the outside), show the idea Figure 3 , pull out the guide wire from the catheter holder position and the metal ball, connecting tube attached to the guide wire.

[0042] 6, fix the tail end of the catheter in the patient's nasal cavity position, take X-ray or other judgment index or image to determine the position of the front end of the catheter in the duodenum or jejunum.

Claims

1. A nasoenteric tube that is easy to insert, characterized in that, It includes a flexible catheter (1), with an opening at the front end of the catheter. A soluble colloidal layer (7) is wrapped around the opening at the front end of the catheter and the side wall. The rear end of the catheter is connected to the main lumen (8) and the side lumen (9). There is a guide wire (2) inside the catheter. The rear end of the guide wire (2) extends out of the catheter (1) and the main lumen (8) and is connected to a guide wire fixator (10). The front end of the guide wire (2) is connected to a connecting tube (5) that is thicker than the guide wire. The circumferential wall of the connecting tube (5) is connected with fluff (6).

2. The nasoenteric tube according to claim 1, characterized in that, The connecting pipe (5) is made of silicone tubing.

3. The nasoenteric tube according to claim 1, characterized in that, One end of the fluff (6) is connected to the connecting tube (5), and the other end is inclined towards the rear end of the guide wire.

4. The nasoenteric tube according to claim 1, characterized in that, The front end sidewall of the catheter (1) has a side hole (3).

5. The nasoenteric tube according to claim 1, characterized in that, The front end of the connecting pipe (5) is also connected to a metal ball (4).

6. The nasoenteric tube according to claim 1, characterized in that, The down is made of animal hair or polyester fiber.

7. The nasoenteric tube according to claim 1, characterized in that, The soluble colloidal layer is made of protein colloid or starch colloid.

8. The nasoenteric tube according to claim 7, characterized in that, The soluble colloidal layer is made of gelatin or agar.

9. The nasoenteric tube according to claim 1, characterized in that, The catheter is made of silicone.

10. The nasoenteric tube according to claim 1, characterized in that, The outer wall of the catheter also has a raised safety post (11) at 130cm.

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