CN209967370U - dilation introducer - Google Patents

Abstract

The utility model provides an expansion guide, comprising an introducer main body, an expansion body, an introducer seat and a sliding sleeve. The tube is slidably sleeved on the main body part, and one end of the main body part away from the expansion body is connected with the introducer seat. The expansion body includes no less than 4 elastic skeletons, the two ends of the elastic skeleton are respectively provided with elastic skeleton connecting bodies, and the elastic skeleton passes through The elastic frame connecting body is arranged at the expansion body part. The beneficial effect of the utility model is that the adoption of the above technical scheme provides a new way for the intubation of the catheter, the intubation resistance is small, and the patient suffers less pain.

Description

dilation introducer

technical field

The utility model belongs to the technical field of medical devices, in particular to an expansion introducer.

Background technique

As a common clinical medical method, intubation plays an important role in clinical practice. The usual function of intubation is to exchange liquid substances in a cavity in the human body with the outside world through a catheter. For example, a urinary catheter leads out the urine in the bladder, a gastric tube injects liquid food into the stomach, and a drainage tube puts the liquid in the cavity. The pus and blood are excreted from the body.

The catheters are mainly made of silicone, rubber, EVA, PVC, etc. The head end and the tube body are soft. In the process of intubation, when the channel is relatively narrow, the intubation resistance is too large and the intubation is difficult. Taking a urinary catheter as an example, some patients have high resistance in the urethra due to urethral stricture, benign prostatic hyperplasia, canceration, and bladder neck sclerosis, which greatly increases the difficulty of catheter placement. Existing clinical catheterization usually fix the external urethral orifice with one hand after sterilizing the external urethral orifice and surrounding tissues, and hold the catheter with the other hand directly or with forceps, and insert it from the urethral orifice. , it needs to be inserted more forcefully, causing great pain to the patient, causing damage to the urethral mucosa, causing damage to the urinary tract structure, and increasing the risk of urinary tract infection. When the gastric tube passes through the cardia during intubation, there is also the problem of difficulty in intubation.

The following problems exist in the existing clinical intubation process: when the top of the catheter head travels to the urethral stenosis, it needs to increase the external force, and the top of the head and the human tissue at the stenosis will shear. The intima of the catheter was also severely bruised and created conditions for microbial infection. Measures such as applying lubricating oil on the outer surface of the catheter had little effect.

The utility model of application No. 2009200275009 discloses a guide wire catheter, which includes a guide wire and a catheter, the catheter is provided with a guide wire, and the guide wire is first inserted into the catheter, so that the catheter has a certain Rigid, after the catheter is inserted into the bladder, the guidewire is withdrawn from the catheter.

However, even with the presence of the guide wire, the above-mentioned problems faced by the cannula are only alleviated to a limited extent, and the resistance of the cannula is not fundamentally reduced.

Utility model content

The purpose of the utility model is to provide an expansion introducer, which especially solves the problem of large resistance at the top of the catheter during intubation.

The technical scheme of the present utility model is:

An expansion guide includes an introducer main body, an expansion body, an introducer seat and a sliding sleeve, the introducer main body sequentially includes a guide part, an expansion body part and a main body part, and the sliding sleeve is slidably sleeved on The main body part, one end of the main body part away from the expansion body is connected with the introducer seat, the expansion body includes no less than 4 elastic skeletons, the two ends of the elastic skeleton are respectively provided with elastic skeleton connecting bodies, and the elastic skeleton passes through the elastic skeleton connecting bodies Set at the expansion body.

When in use, the dilation introducer needs to be used in conjunction with the catheter, and the dilation introducer is inserted into the catheter, so that the guide part and the dilation body part of the dilation introducer protrude from the through hole at the front end of the catheter, and the dilation body part is provided with a The expansion body of the lantern structure, the expansion body is activated by a sliding sleeve sleeved on the outside of the main body part. When in use, the operator slides the sliding sleeve forward relative to the main body part, and the sliding sleeve presses the expansion part located in the expansion body part along the axis direction. The elastic frame of the expansion body is bent and deformed under the action of the sliding sleeve, and multiple groups of elastic frames form a lantern-shaped expansion area in the urethra, which clears the path for the advancement of the catheter outside the expansion introducer.

The elastic skeleton connecting body is annular, the inner diameter of the elastic skeleton connecting body matches the diameter of the expanding body, and the outer diameter of the elastic skeleton connecting body matches the diameter of one end of the guiding part close to the expanding body. The elastic skeleton connecting body cooperates with the elastic skeleton to form an independent expansion device, so that the elastic skeleton is not directly connected with the guide part or the sliding sleeve. , so that each elastic skeleton of the expanding body expands evenly. The expansion body is rotatable relative to the introducer body so that it receives only the compression from the sliding sleeve, but not the force in the circumferential direction generated by the rotation of the sliding sleeve.

The elastic skeleton is connected with the elastic skeleton connecting body through an arc-shaped connecting body, and the arc of the arc-shaped connecting body is 0.1-2°. When the elastic skeleton is squeezed, its bending direction is not fixed, and it may bend outward or inward. So as to achieve a lantern-like expansion effect.

The elastic skeleton material is an elastic recoverable material, such as nickel-titanium alloy, medical stainless steel, beryllium bronze, spring steel and the like.

The outer surface of the expansion body is provided with an elastic mantle which is matched with the expansion body. The inner side wall of the elastic sleeve is fixedly connected with the elastic frame. The elastic mantle increases the contact area between the expansion body and the urethra, reduces the pressure, and reduces the discomfort caused by the expansion of the expansion body to the patient.

The introducer base includes a lower part of the introducer base, an upper part of the introducer base, and a sleeve seat sleeved on the upper part of the introducer base. The diameter of the circular hole is smaller than the diameter of the sliding sleeve. The sleeve seat and the upper part of the guide seat can slide relative to each other, and the main body of the guide is fixed to the upper part of the guide seat through the round hole. When the sleeve seat slides relative to the upper part of the guide seat, push the sleeve to move forward, and the guide seat And the outer diameter of the sleeve seat is larger, which is convenient for the operation of the expansion introducer.

The upper outer surface of the introducer seat is provided with a first thread, and the inner surface of the sleeve seat is provided with a second thread matched with the first thread. The sleeve seat is moved relative to the upper part of the introducer seat through the thread, which can also effectively limit the advancing sliding sleeve. The advancing sliding sleeve has a tendency to reset under the reaction of the expanding body. Make the operator free both hands to operate the catheter.

Optionally, the guide portion is arc-shaped. The arc-shaped guide portion is made of elastic material, and the material of the guide portion includes, for example, polyvinyl chloride, thermoplastic elastomer, polyurethane, polypropylene, ABS, nylon, and the like. For human body passages that are not straight, the curved guides are more likely to transmit thrust.

The top end of the guide portion is conical or hemispherical, and the diameter of the bottom surface of the guide portion matches the diameter of the main body portion.

The advantages and positive effects of the utility model are as follows: due to the adoption of the above technical scheme, the expansion guide provides a new way for intubation, the intubation resistance is small, and the patient suffers less pain.

Description of drawings

Fig. 1 is the structural schematic diagram of the expansion body of the present invention in the contracted state

Figure 2 is a cross-sectional view of the expanding body of the present invention after being stretched

FIG. 3 is a schematic diagram of the structure at A in FIG. 2

FIG. 4 is a schematic view of the structure at B in FIG. 2

In the picture:

1. Introducer body 2. Expander 3. Introducer seat

4. Sliding sleeve 11, guiding part 12, expanding body part

13. Main body 21. Elastic frame 22. Connecting body

23. Elastic frame connecting body 31, lower part of guide seat 32, upper part of guide seat

33. Seat

Detailed ways

Example 1

As shown in Figure 1-4,

An expansion introducer includes an introducer main body 1, an expansion body 2, an introducer base 3 and a sliding sleeve 4, the introducer main body 1 sequentially includes a guide portion 11, an expansion body portion 12 and a main body portion 13. The sliding sleeve 4 is slidably sleeved on the main body part 13, and one end of the main body part 13 away from the expansion body 2 is connected with the introducer seat 3. The expansion body 2 includes six elastic frames 21, and two ends of the elastic frame 21 are respectively provided with There is an elastic frame connecting body 23 , and the elastic frame 21 is disposed at the expansion body part 12 through the elastic frame connecting body 23 .

The elastic skeleton connecting body 23 is annular, the inner diameter of the elastic skeleton connecting body 23 is matched with the diameter of the expansion body 12 , the outer diameter of the elastic skeleton connecting body 23 and the guide portion 11 are close to one end of the expansion body 12 . diameter to match.

The elastic frame 21 is connected with the elastic frame connecting body 23 through an arc-shaped connecting body 22, and the arc of the arc-shaped connecting body 22 is 0.3°.

The outer surface of the expansion body 2 is provided with an elastic mantle matched with the expansion body 2 .

The inner side wall of the elastic sleeve is fixedly connected with the elastic frame 21 .

The introducer base 3 includes a lower part 31 of the introducer base, an upper part 32 of the introducer base, and a sleeve base 33 sleeved on the upper part of the introducer base. The diameter of the circular hole matched with the diameter of the main body portion 13 is smaller than the diameter of the sliding sleeve 4 .

The outer surface of the upper part 32 of the introducer seat is provided with a first thread, and the inner surface of the sleeve seat 33 is provided with a second thread matched with the first thread.

The top end of the guide portion 11 is hemispherical, and the diameter of the bottom surface of the guide portion 11 matches the diameter of the main body portion 13 .

Example 2

As shown in Figure 1-4

An expansion introducer includes an introducer main body 1, an expansion body 2, an introducer base 3 and a sliding sleeve 4, the introducer main body 1 sequentially includes a guide portion 11, an expansion body portion 12 and a main body portion 13. The sliding sleeve 4 is slidably sleeved on the main body part 13, and one end of the main body part 13 away from the expansion body 2 is connected with the introducer seat 3. The expansion body 2 includes six elastic frames 21, and two ends of the elastic frame 21 are respectively provided with There is an elastic frame connecting body 23 , and the elastic frame 21 is disposed at the expansion body part 12 through the elastic frame connecting body 23 .

The elastic skeleton connecting body 23 is annular, the inner diameter of the elastic skeleton connecting body 23 is matched with the diameter of the expansion body 12 , the outer diameter of the elastic skeleton connecting body 23 and the guide portion 11 are close to one end of the expansion body 12 . diameter to match.

The elastic frame 21 is connected with the elastic frame connecting body 23 through an arc-shaped connecting body 22, and the arc of the arc-shaped connecting body 22 is 0.3°.

The outer surface of the expansion body 2 is provided with an elastic mantle matched with the expansion body 2 .

The inner side wall of the elastic sleeve is fixedly connected with the elastic frame 21 .

The introducer base 3 includes a lower part 31 of the introducer base, an upper part 32 of the introducer base, and a sleeve base 33 sleeved on the upper part of the introducer base. The diameter of the circular hole matched with the diameter of the main body portion 13 is smaller than the diameter of the sliding sleeve 4 .

The outer surface of the upper part 32 of the introducer seat is provided with a first thread, and the inner surface of the sleeve seat 33 is provided with a second thread matched with the first thread.

The guide portion 11 is arc-shaped. The guide portion 11 is an elastic material, and the material is any one of X and Y.

The top end of the guide portion 11 is hemispherical, and the diameter of the bottom surface of the guide portion 11 matches the diameter of the main body portion 13 .

Example 3

As shown in Figure 1-4

An expansion introducer includes an introducer main body 1, an expansion body 2, an introducer base 3 and a sliding sleeve 4, the introducer main body 1 sequentially includes a guide portion 11, an expansion body portion 12 and a main body portion 13. The sliding sleeve 4 is slidably sleeved on the main body part 13, and one end of the main body part 13 away from the expansion body 2 is connected with the introducer seat 3. The expansion body 2 includes six elastic frames 21, and two ends of the elastic frame 21 are respectively provided with There is an elastic frame connecting body 23 , and the elastic frame 21 is disposed at the expansion body part 12 through the elastic frame connecting body 23 .

The elastic skeleton connecting body 23 is annular, the inner diameter of the elastic skeleton connecting body 23 is matched with the diameter of the expansion body 12 , the outer diameter of the elastic skeleton connecting body 23 and the guide portion 11 are close to one end of the expansion body 12 . diameter to match.

The elastic frame 21 is connected with the elastic frame connecting body 23 through an arc-shaped connecting body 22, and the arc of the arc-shaped connecting body 22 is 0.3°.

The outer surface of the expansion body 2 is provided with an elastic mantle matched with the expansion body 2 .

The inner side wall of the elastic sleeve is fixedly connected with the elastic frame 21 .

The introducer base 3 includes a lower part 31 of the introducer base, an upper part 32 of the introducer base, and a sleeve base 33 sleeved on the upper part of the introducer base. The diameter of the circular hole matched with the diameter of the main body portion 13 is smaller than the diameter of the sliding sleeve 4 .

The sleeve seat 33 is slidably connected with the upper part 32 of the guide seat, and the upper part 32 of the guide seat is provided with a limiting device. The limiting device includes a limiting rod penetrating the upper part 32 of the guide seat along the radial direction of the upper part 32 of the guide seat, the length of the limiting rod is greater than the diameter of the upper part 32 of the guide seat, the limiting rod There is an elastic body in the middle.

The introducer body 1 dilates the urethra through the dilation body 2, and the final function is to advance the catheter sheathed outside the dilation introducer. When the expansion body 2 is supported, it is squeezed by the urethral wall, the expansion body 2 has a tendency to shrink inward, and the sliding sleeve 4 also has a tendency to return to the rear. The sleeve seat 33 is in contact with the sliding sleeve 4, and the sleeve seat 33 also has a tendency to be reset backward. At this time, it is necessary to relatively fix the sliding sleeve 4 and the introducer body 1, that is, the position of the sleeve base 33 and the upper part 32 of the introducer base need to be relatively fixed, so as to maintain the expansion body 2. deformation. An elastic body is arranged in the limiting device. Under normal conditions, the elastic body is compressed. The length of the limiting rod is equal to the inner diameter of the sleeve seat 33. The limiting rod is located in the sleeve seat 33. When the sleeve seat 33 slides forward, the sleeve seat 33 The end is separated from the limit rod, the elastic body of the limit rod expands, and the length of the limit rod is greater than the inner diameter of the sleeve seat 33 , which restricts the reset of the sleeve seat 33 .

The top end of the guide portion 11 is hemispherical, and the diameter of the bottom surface of the guide portion 11 matches the diameter of the main body portion 13 .

An embodiment of the present invention has been described in detail above, but the content is only a preferred embodiment of the present invention, and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present utility model should still belong to the scope of the patent of the present utility model.

Claims (9)

1. An expansion introducer, characterized in that: it comprises an introducer main body, an expansion body, an introducer seat and a sliding sleeve, and the introducer main body sequentially comprises a guide part, an expansion body part and a main body part, The sliding sleeve is slidably sleeved on the main body part, and one end of the main body part away from the expansion body is connected with the introducer seat. The expansion body includes no less than 4 elastic skeletons, and the two ends of the elastic skeleton are respectively provided with elastic skeleton connecting bodies. The skeleton is arranged at the expansion body part through the elastic skeleton connecting body. 2 . The dilation introducer according to claim 1 , wherein the elastic skeleton connecting body is annular, the inner diameter of the elastic skeleton connecting body is matched with the diameter of the expanding body portion, and the elastic skeleton connecting body is circular. 3 . The outer diameter of the guide part matches the diameter of one end of the guide part close to the expansion body part. 3 . The dilation introducer according to claim 2 , wherein the elastic skeleton is connected to the elastic skeleton connecting body through an arc-shaped connecting body, and the arc of the arc-shaped connecting body is 0.1-2°. 4 . 4 . The dilation introducer according to claim 1 , wherein an elastic mantle is arranged on the outer surface of the dilation body to cooperate with the dilation body. 5 . 5 . The dilation introducer according to claim 4 , wherein the inner side wall of the elastic sheath is fixedly connected with the elastic frame. 6 . 6 . The expansion introducer according to claim 1 , wherein the introducer base comprises a lower part of the introducer base, an upper part of the introducer base, and a sleeve base sleeved on the upper part of the introducer base, so the The side of the sleeve seat close to the main body of the introducer is provided with a circular hole matched with the diameter of the main body, and the diameter of the circular hole is smaller than the diameter of the sliding sleeve. 7 . The dilation introducer according to claim 6 , wherein a first thread is formed on the outer surface of the upper part of the introducer base, and a second thread matched with the first thread is formed on the inner surface of the sleeve base. 8 . 8 . The dilation introducer of claim 1 , wherein the guide portion is arc-shaped. 9 . 9 . The dilation introducer according to claim 1 , wherein the top end of the guiding portion is conical or hemispherical, and the diameter of the bottom surface of the guiding portion matches the diameter of the main body portion. 10 .

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