CN204932313U - Conduit tube component - Google Patents

Abstract

The utility model discloses a catheter assembly, which comprises a head end, a pipe, a joint, a guide wire and a handle. One end of the pipe is connected to the head end, and the other end of the pipe is connected to the joint; the guide wire is movably extended. into the tube, the first end of the guide wire can be inserted into the head end, and the second end is movably passed through the joint and connected to the handle; the inside of the head end forms a cavity, and the shape consists of two sections One-piece molding, one section is cylindrical with a cutout on the side, the cutout communicates with the cavity, the other section is conical or pointed with a convex arc surface, this section is closed, and the apex of this section is in the transition of an arc surface; one end of the head end An opening is formed on the end surface, and the opening communicates with the cavity, and the opening communicates with the tube. The catheter assembly of the utility model ensures a large flow rate in the inner cavity of the tube, and at the same time, the tube has good support and is convenient for tube placement; the inner wall of the tube and the outer wall of the guide wire are lubricated, and the surface is smooth to prevent the tube from being blocked, and the guide wire is inserted and removed smoothly. There is little resistance.

Description

catheter assembly

technical field

The utility model belongs to the technical field of medical equipment manufacturing, in particular to a full-radiography bullet catheter assembly.

Background technique

The nasogastric tube is composed of catheters and joints of different materials, generally made of PVC, silicone, rubber, TPU, etc. Cleaning, emptying, priming, decompression, etc. The usage process is as follows:

1. Prepare all the supplies and go to the bedside, check the name and bed number, explain and obtain cooperation.

2. Assist the patient to take a suitable position: take a semi-recumbent or sitting position; open the sterile tray, take out the treatment towel and place it under the patient's jaw, and place the curved tray next to the cheek.

3. Prepare for intubation: (1) Wear gloves. (2) Check the condition of the nasogastric tube. (3) Insert the guide wire into the tube completely, so that the connecting handle at the end of the wire is fixed with the connecting head of the nasogastric tube. (4) Check and clean the nasal cavity, and observe whether the nasal cavity is unobstructed. (5) Measure the insertion length of the nasogastric tube: mark the distance from the forehead hairline to the xiphoid process of the sternum or from the tip of the nose to the xiphoid process of the sternum through the earlobe; in addition, make another mark at 25cm and 50cm away from the mark. ⑹ Take paraffin oil gauze to lubricate the nasogastric tube.

4. Insert the nasogastric tube: ⑴Hold the nasogastric tube with gauze in the left hand, clamp the front end of the nasogastric tube with tweezers in the right hand, and gently insert it along the nostril of the selected side. ⑵When the nasogastric tube is inserted to 10-15cm (throat), perform intubation according to the patient's specific conditions: ①Conscientious patients: Ask the patient to swallow, and advance the nasogastric tube to the first marked length . ②A comatose patient: hold the patient's head up with the left hand, make the mandible close to the sternum manubrium, and slowly insert the nasogastric tube to the first marked length. ⑶ If the patient has severe nausea or vomiting, the insertion should be suspended, and the patient should be asked to take a deep breath or open his mouth, and then insert to the first marked length after a short rest. The intubation action should be gentle and steady, especially when passing through the three stenosis of the esophagus (the level of the cricoid cartilage, the bifurcation of the flat trachea, and the place where the esophagus passes through the diaphragm), so as not to damage the esophageal mucosa. (4) Use a spatula to check whether the nasogastric tube is coiled in the mouth.

5. The first marked position should be in the stomach. At this time, it should be verified whether the nasogastric tube is in the stomach: connect a syringe to the end of the nasogastric tube for suction, and the gastric juice can be drawn out; put the end of the nasogastric tube in warm water In the middle, no air bubbles escape; put a stethoscope on the stomach, use a syringe to quickly inject 10ml of air into the stomach through the nasogastric tube, and the sound of air passing through the water can be heard; the most ideal method is to measure the pH value by X-ray fluoroscopy or extracting liquid to determine the location of the pipeline.

6. After confirming that the nasogastric tube is in the stomach, inject at least 20ml of sterile saline into the tube, withdraw the guide wire about 25cm from the tube, continue intubating to the second mark, and finally withdraw all the wire. Use the method of blind insertion to continue sending the nasogastric tube to the third mark (observe the general condition of the patient), withdraw it, and if there is bile drawn out, it is determined to be in the duodenum and fixed at this time. If it is a spiral nasogastric tube, the nasogastric tube should not be fixed on the nose, but the tube should be suspended for about 40 cm, and then the nasogastric tube should be fixed near the earlobe. With normal GI motility, the tube passes through the pylorus within 8‐12 hours and is secured when the third marker of the tube reaches the patient's nose.

7. Fixation: The method of double fixing the gastric tube with adhesive plaster and lace can reduce the incidence of falling off of the gastric tube and nutrition tube. The end of the nasogastric tube is pinned to the side of the pillow, drapes, or the patient's collar.

8. Enteral nutrition can be performed after confirming that the position of the pipeline is correct through X-ray fluoroscopy.

9. Extubation: ⑴Preparation before extubation: ①Rinse the pipeline with sterile normal saline; ②Put a therapeutic towel under the patient's jaw, place a curved plate under the patient's cheek, loosen the pin, and clamp the end of the nasogastric tube ( To avoid residual liquid entering the trachea during the process of withdrawing the pipeline), gently peel off the fixed tape and tape. (2) Pull out the nasogastric tube: Wrap the nasogastric tube near the nostrils with gauze, wipe the tube with gauze while pulling it out, instruct the patient to take a deep breath, pull out the tube when the patient exhales, and quickly pull it out at the throat (about 15cm left) out. (3) Put the nasogastric tube into the curved plate, remove it from the patient's sight, clean the patient's mouth, nose and face, remove the traces of adhesive tape, assist the patient to rinse their mouth, arrange the bed unit, and adopt a comfortable lying position.

The current clinical use of nasogastric tube mainly has the following disadvantages:

1. The success rate of inserting directly through the pylorus is very low. It needs to rely on the peristalsis of the gastrointestinal tract itself or the action of gravity to pass through the pylorus and enter the duodenum and jejunum. Generally, it takes 12-24 hours to reach the nutritional site, and the success rate is low.

2. There are two main structures of the head end of nasointestinal tube: one is closed head end and side incision, which is more likely to cause tube blockage; the other is head end open and side incision, although this method solves some problems Blockage problem, but the tip is more irritating to the gastrointestinal wall during the insertion process, which is easy to cause damage.

Utility model content

In order to solve the above-mentioned problems in the prior art, the utility model provides a catheter assembly.

The utility model adopts the following technical scheme: the catheter assembly includes a head end, a pipe, a joint, a guide wire and a handle, one end of the pipe is connected to the head end, and the other end of the pipe is connected to the joint; the guide wire is movable The first end of the guide wire can be inserted into the head end, and the second end is movably passed through the joint and connected to the handle; the inside of the head end forms a cavity, and the shape is composed of two The section is integrally formed, one section is cylindrical with a cutout on the side, the cutout communicates with the cavity, the other section is conical or pointed with a convex arc surface, this section is closed, and the apex of this section is a transition of an arc surface; An opening is formed on one end surface, and the opening communicates with the cavity, and the opening communicates with the tube.

In the catheter assembly, the outer wall at the opening at the head end is chamfered.

In the catheter assembly, scales are printed along the length of the tube.

In the catheter assembly, the inner and outer diameter ratio of the pipe is 0.58-0.68.

In the catheter assembly, the inner wall of the pipe is lubricated.

In the catheter assembly, the guide wire is made of stainless steel and adopts an 8-shaped winding method.

In the catheter assembly, one end of the guide wire that can be inserted into the head is in the shape of an ellipsoid.

In the catheter assembly, the surface of the guide wire is lubricated.

The catheter assembly of the utility model ensures a large flow rate in the inner cavity of the tube, and at the same time, the tube has good support and is convenient for tube placement; the inner wall of the tube and the outer wall of the guide wire are lubricated, and the surface is smooth to prevent tube blockage, and the guide wire is inserted and removed smoothly. There is little resistance. The support of the guide wire is good, and it is easy to place the tube; the end of the guide wire is ellipsoidal, without welding, which can better protect the mucosa from damage than the welded dots, and avoid the end of the guide wire from inserting and scratching the mucosa. The head end adopts a side-cut liquid outlet, which has low resistance and large liquid output; the shape of the head end is similar to a bullet head, and the force-bearing surface is a circular arc surface when the tube is placed, which will not scratch the mucous membrane; Smooth, no step feeling to the touch.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Fig. 2 is a schematic diagram of the three-dimensional structure of the head end.

Fig. 3 is a schematic diagram of another three-dimensional structure of the head end.

Figure 4 is a front view of the head end.

Fig. 5 is an A-A sectional view of Fig. 4 .

Fig. 6 is a schematic diagram of the structure of the guide wire.

Fig. 7 is a sectional view of part A of Fig. 6 .

FIG. 8 is an enlarged view of part B of FIG. 6 .

FIG. 9 is an enlarged view of part C in FIG. 6 .

In the illustration, 1-head, 2-tube, 3-printed scale, 4-joint, 5-guide wire, 6-handle.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1-9, the full contrast catheter assembly of this embodiment includes a head end 1, a tube 2, a joint 4, a guide wire 5, and a handle 6, and a scale 3 is printed on the tube 2 along its length.

One end of the tube 2 is connected to the head end 1, and the inside of the head end 1 forms a cavity. The shape is composed of two sections, one section is cylindrical with a side cut 1-1, and the other section 1-3 is a pointed tip with a convex arc surface shape (this end can also be conical), the apex 1‐3‐1 of the pointed end is an arc surface transition, and this section is closed. The incision 1-1 extends along the length direction of the head end 1 and communicates with the cavity. One end surface of the head end 1 forms an opening 1-2, and the opening communicates with the inner cavity, which communicates with the pipe 2. The outer wall at the opening of the head end is chamfered to facilitate the smooth transition of the pipe 2 . The head end 1 adopts a side-cut liquid outlet, which has small resistance and large liquid output. The head-end insert is injection-molded, and the transition with the pipe 2 is smooth, and there is no sense of step when touching. The overall shape of the head end 1 is similar to a bullet, and when the tube is placed, its stress-bearing surface is a circular arc surface, which will not scratch the patient's mucous membrane.

The other end of the pipe 2 is plugged into a joint 4 . Tube 2 is made of full-contrast line TPU material (it is irradiated with X-rays in the hospital, the catheter appears white on the X-ray film, and is used to determine the position of the catheter under X-rays) (explain the full-contrast line), and the contrast agent addition ratio is 20% ~50% (here is the weight ratio, the contrast agent such as barium sulfate, which is adjusted into a suspension and swallowed or enema for gastrointestinal contrast), the contrast effect is good; the ratio of the inner and outer diameters of the tube 2 is 0.58 to 0.68, which can ensure The inner cavity has a large flow rate, and at the same time, the support of the tube is better, which is convenient for tube placement; the inner wall of the tube is lubricated, and the surface is smooth to prevent tube blockage. The lubricating treatment solution adopted is configured as lubricating liquid:diluent=1:10～60 (here is weight ratio, lubricating liquid can be selected medical dispersion liquid; diluent can be selected medical grade volatile silicone oil).

The tube 2 has a built-in movable guide wire 5, and the guide wire is made of stainless steel, which can prevent rust, and the tube has good support and is convenient for tube placement. The guide wire 5 adopts an 8-shaped winding method to reduce friction with the inner wall of the tube, and the surface is treated with the above-mentioned lubricating solution, so that it can be pulled out smoothly and has low resistance. The head end 5-1 of the guide wire 5 is in the shape of an ellipsoid without welding, which can better protect the mucous membrane from damage compared with the welded dots, and avoid inserting and scratching the mucous membrane at the head end of the guide wire. The head end 5-1 of the guide wire can be inserted into the opening and the inner cavity of the head end 1. The other end of the guide wire is connected with the handle 6 after passing through the joint 4 movably.

The above preferred embodiments and principles of the utility model have been described in detail. For those of ordinary skill in the art, according to the ideas provided by the utility model, there will be changes in the specific implementation, and these changes should also be regarded as Protection scope of the present utility model.

Claims (8)

1. Catheter assembly, including a head end, a tube, a connector, a guide wire and a handle, one end of the tube is connected to the head end, and the other end of the tube is connected to the connector; the guide wire is movably inserted into the tube , the first end of the guide wire can extend into the head end, and the second end movably passes through the joint and is connected to the handle; it is characterized in that: the inside of the head end forms a cavity, and the shape consists of two The section is integrally formed, one section is cylindrical with a cutout on the side, the cutout communicates with the cavity, the other section is conical or pointed with a convex arc surface, this section is closed, and the apex of this section is a transition of an arc surface; An opening is formed on one end surface, and the opening communicates with the cavity, and the opening communicates with the tube. 2. The catheter assembly according to claim 1, wherein the outer wall at the opening of the head end is chamfered. 3. The catheter assembly as claimed in claim 1, wherein the tube has graduations printed along its length. 4. The catheter assembly according to claim 1, characterized in that: the inner diameter ratio of the pipe is 0.58-0.68. 5. The catheter assembly according to claim 1, 3 or 4, wherein the inner wall of the tube is lubricated. 6. The catheter assembly according to claim 1, wherein the guide wire is made of stainless steel and is wound in a figure-eight manner. 7. The catheter assembly according to claim 1, wherein one end of the guide wire that can be inserted into the head end is in the shape of an ellipsoid. 8. The catheter assembly according to claim 1, 6 or 7, wherein the surface of the guide wire is lubricated.