Anti-pulling ureter fixing device

Abstract

The invention relates to an anti-traction ureter fixing device, and belongs to the technical field of medical instruments. The anti-pulling ureter fixing device comprises a buckle waistband, a concentric-square-shaped connecting strip is connected to the inner side of the buckle waistband in a clamped mode, and the surface of the concentric-square-shaped connecting strip is sleeved with a fixator; the fixing device comprises a sleeve frame arranged on the surface of the concentric-square-shaped connecting strip in a sleeving mode, a through hole is formed in one end of the sleeve frame, a clamping groove is formed in one end of the sleeve frame, a clamping frame is clamped in the clamping groove, one end of the clamping frame is fixedly connected with an installation cylinder communicated with the through hole, and a positioning air bag is installed in the installation cylinder in an embedded mode. The fixing device can fix the portion, extending out of the urethra, of the ureter through high friction force, even if the ureter on the outer side of the installation cylinder is pulled through external force, the ureter can be firmly locked, the probability that the urethra of a patient is damaged due to pulling is avoided, and the problem that an existing ureter fixing device with the pulling prevention function is poor in pulling prevention effect is solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a urinary catheter fixing device capable of preventing traction. Background Art

[0002] Catheterization is widely used in clinic as a basic medical operation, and many surgical operations require catheterization. At present, common catheterization devices are composed of structures such as urinary catheters, air (water) balloons, and urine bags. Urinary catheters are pipes made of natural rubber or silicone and are mainly inserted into the bladder through the urethra to drain urine. The inner end of the urinary catheter inserted into the bladder has an air balloon to fix the inner end of the urinary catheter so that the inner end remains in the bladder and is not easy to fall out. The outer end of the urinary catheter is connected to the urinary catheter through a connecting tube, and the urinary catheter is connected to the urine bag for collecting urine.

[0003] The Chinese patent discloses an anti-extubation catheter fixer (authorization announcement number is CN219681436U), which wraps the part where the patient's urethra and the catheter are connected through a wrapping plate, and allows two strap connection strips to pass through the strap connection holes set on the front silicone plate from back to front and allows the front plate buttons set on the front silicone plate to be buckled into the button holes of the connection strips to fix the strap connection strips, then the catheter is laterally inserted into the catheter movable groove from the side of the front silicone plate, and the catheter is pressed from top to bottom and placed in the first catheter fixing groove and the second catheter fixing groove respectively set on the first plastic fixing plate and the second plastic fixing plate, and finally the screws set on the second plastic fixing plate are embedded in the threaded holes set on the first plastic fixing plate and tightened, so that the catheter is clamped and fixed, effectively improving the stability of the catheter fixation.

[0004] According to the above reference cases, although the above device uses a wrapping plate to wrap the urethra and the catheter, and fixes the urethra to the front silicone plate through a plastic fixing plate and screws, the part of the catheter between the plastic fixing plate and the wrapping plate is still not fixed, and external force can still easily pull the catheter through this part, and there is still a probability of increasing the patient's pain and risk. Summary of the invention

[0005] Based on this, it is necessary to provide a urinary catheter fixing device with an anti-pull function to address the problem that the existing urinary catheter fixing device with an anti-pull function has a poor anti-pull effect.

[0006] A urinary catheter fixing device capable of preventing pulling comprises a buckle belt, wherein a circular connecting strip is clamped on the inner side of the buckle belt, and a fixer is sleeved on the surface of the circular connecting strip.

[0007] Furthermore, the fixer includes a sleeve frame sleeved on the surface of the circular connecting strip, one end of the sleeve frame is provided with a through hole, one end of the sleeve frame is provided with a card slot, the interior of the card slot is carded with the card frame, one end of the card frame is fixedly connected to a mounting tube connected to the through hole, a positioning airbag is embedded and installed inside the mounting tube, one end of the positioning airbag is fixedly connected and connected to an extrusion airbag, one end of the extrusion airbag passes through the interior of the card frame, and one end of the extrusion airbag is fixedly connected to an extrusion block in contact with the card slot.

[0008] In one of the embodiments, the fixator can use high friction to fix the part of the catheter extending out of the urethra. Even if external force pulls the catheter outside the mounting tube, the catheter can be firmly locked to avoid the possibility of damaging the patient's urethra due to pulling, so as to solve the problem that the existing catheter fixing device with anti-pulling function has poor anti-pulling effect; and the elastically fixed positioning airbag can follow the catheter to produce a small displacement when the patient generates a low pulling force due to walking, so as to meet the patient's need to pull the catheter due to expansion and contraction of the urethra when walking, etc., to ensure that the catheter and urethra always remain in a relatively static state, further reducing the probability of the urethra being damaged by the catheter.

[0009] Furthermore, an annular cavity connected to the card slot is opened on the inner side of the sleeve frame, and the fixer also includes a positioning mechanism, which includes a ring plate slidably connected to the inside of the annular cavity, and the other end of the card frame and one end of the extrusion block are both in contact with the ring plate, and the other end of the ring plate is fixedly connected to a needle, and the tip of the needle passes through the annular cavity and extends to the inside of the circular connecting strip.

[0010] In one of the embodiments, when the card frame is inserted into the card slot, the card frame can actively squeeze the puncture needle out of the ring cavity and insert it into the circular connecting strip, firmly locking the catheter at the corresponding position of the circular connecting strip, so that the catheter can operate more stably.

[0011] Furthermore, the fixer also includes a bending guide mechanism, which includes a rubber bellows fixedly connected and communicating between the through hole and the mounting tube, and the interior of the rubber bellows is embedded with uniformly distributed stainless steel rings.

[0012] In one of the embodiments, during the process of installing the tube to bend the catheter, the rubber bellows drives the stainless steel ring to bend and wrap the catheter synchronously. At this time, the stainless steel ring can not only support the rubber bellows to prevent the inner diameter of the rubber bellows from changing to reduce the probability of compressing the catheter, but also the stainless steel ring can prevent the catheter from bending and deforming, avoiding the catheter from bending and clogging during the bending process, thereby further ensuring the smooth flow of the catheter.

[0013] Furthermore, the positioning airbag is in a spiral shape, the positioning airbag is in an expanded state, and the squeezing airbag is in an elastic squeezing state.

[0014] In one of the embodiments, this not only increases the contact area between the positioning airbag and the catheter to improve the locking strength of the catheter, but also can evenly apply pressure to the catheter to prevent the catheter from being concave and blocking urine due to concentrated squeezing force.

[0015] Furthermore, a spiral groove is provided on the inner side of the installation tube, and the positioning airbag is embedded and installed inside the spiral groove.

[0016] In one of the embodiments, this can not only reduce the probability of the urinary catheter being blocked by the positioning balloon during the initial penetration of the installation tube, but also limit the expansion tendency of the positioning balloon to improve the positioning effect of the positioning balloon on the urinary catheter.

[0017] Furthermore, the horizontal cross-section of the card frame is concave, the horizontal cross-section of the card slot is stepped, and the concave portion of the card frame is engaged with the convex portion of the card slot.

[0018] In one of the embodiments, this can increase the clamping strength between the clamping frame and the clamping slot, further improving the stability of the catheter fixation.

[0019] Furthermore, the number of the card slots is four, and the four card slots are distributed in a ring shape around the axis of the through hole, and two adjacent card slots and the axis of the through hole together form a right angle line.

[0020] In one of the embodiments, this can fix the urinary catheter in a corresponding direction to meet the patient's need to fix the urine bag.

[0021] Furthermore, the horizontal cross-section shape of the inner side of the card frame is an I-shape, the horizontal cross-section shape of the extrusion block is an I-shape, and the minimum inner diameter of the inner side of the card frame is arranged between the two maximum diameters of the extrusion block.

[0022] In one embodiment, this can prevent the squeeze block from completely disengaging from the card frame, thereby preventing it from being lost.

[0023] Furthermore, a rubber spring is arranged between the ring plate and the ring cavity, and the rubber spring is always in a compressed state.

[0024] In one of the embodiments, when the ring plate loses its squeezing force, the rubber spring can actively reset the ring plate and the puncture needle, so that medical staff can freely adjust the position of the sleeve frame, and when the card frame and the card slot are snapped together, the rubber spring can apply a constant squeezing force to the card frame and the squeezing block through the ring plate, further improving the stability of the catheter fixation.

[0025] Furthermore, the inner diameter of the stainless steel ring is larger than the inner diameter of the mounting tube, and the maximum diameter of the rubber bellows is larger than the diameter of the stainless steel ring.

[0026] In one embodiment, this ensures that the urinary catheter can pass properly through the inside of the rubber bellows.

[0027] The above-mentioned anti-pull catheter fixing device can use high friction to fix the part of the catheter extending out of the urethra. Even if the catheter outside the mounting tube is pulled by external force, the catheter can be firmly locked to avoid the possibility of damaging the patient's urethra due to pulling, thereby solving the problem that the existing anti-pull catheter fixing device has a poor anti-pull effect.

[0028] In addition, the elastically fixed positioning airbag can follow the catheter to produce a small displacement when the patient generates a low pulling force due to walking, so as to meet the patient's need to pull the catheter due to the expansion and contraction of the urethra when walking, etc., to ensure that the catheter and urethra always remain in a relatively static state, further reducing the probability of urethra being damaged by the catheter;

[0029] During the installation of the tube-bent catheter, the rubber bellows drives the stainless steel ring to bend and wrap the catheter synchronously. At this time, the stainless steel ring can not only support the rubber bellows to prevent the inner diameter of the rubber bellows from changing, thereby reducing the probability of compressing the catheter, but the stainless steel ring can also prevent the catheter from bending and deforming, thereby avoiding bending and blockage during the bending process, further ensuring the smooth flow of the catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a structural schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of a local structure in the present invention;

[0033] Figure 3 It is a cross-sectional schematic diagram of a local structure in the present invention;

[0034] Figure 4 for Figure 3 A magnified view of middle;

[0035] Figure 5 It is a partial exploded schematic diagram of the fixing device in the present invention;

[0036] Figure 6 It is an exploded schematic diagram of the positioning mechanism in the present invention;

[0037] Figure 7 It is an exploded schematic diagram of the bending guide mechanism in the present invention.

[0038] Reference numerals:

[0039] 100, buckle belt; 200, circular connecting strip; 300, fixer; 310, sleeve frame; 311, through hole; 312, slot; 313, annular cavity; 320, card frame; 330, installation tube; 331, spiral groove; 340, positioning airbag; 350, extrusion airbag; 360, extrusion block; 370, positioning mechanism; 371, ring plate; 372, needle; 373, rubber spring; 380, bending guide mechanism; 381, rubber bellows; 382, ​​stainless steel ring. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present invention are for illustrative purposes only and do not represent the only implementation method.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] Unless otherwise defined, all technical and scientific terms used in the specification of the present invention have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the specification of the present invention includes any and all combinations of one or more related listed items.

[0045] Combine the following Figure 1 - Figure 7 The present invention describes a urinary catheter fixing device capable of preventing traction.

[0046] In one embodiment, a catheter fixing device capable of preventing urinary catheter from being pulled comprises a buckle belt 100, wherein a circular connecting strip 200 is clamped on the inner side of the buckle belt 100, and a fixing device 300 is sleeved on the surface of the circular connecting strip 200; the buckle belt 100 comprises a breathable soft belt, wherein evenly distributed clamping holes are opened on the surface of the breathable soft belt, and a first fixing nail clamped with an adjacent clamping hole is fixedly connected to one end of the breathable soft belt, and two second fixing nails clamped with adjacent clamping holes are fixedly connected to the surface of the circular connecting strip 200;

[0047] When the medical staff performs catheterization on the patient, they first wrap the breathable soft belt around the patient's waist, determine the position of the second fixing pin and the corresponding card hole, then snap one of the second fixing pins on the circular connecting strip 200 into the corresponding card hole, then wrap the circular connecting strip 200 around the patient's crotch, then align the through hole 311 with the patient's urethra, then snap another second fixing pin on the circular connecting strip 200 into the corresponding card hole, then snap the first fixing pin on the breathable soft belt into the corresponding card hole, and now the medical staff can insert the catheter normally.

[0048] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the fixing device 300 includes a sleeve frame 310 sleeved on the surface of the circular connecting strip 200, one end of the sleeve frame 310 is provided with a through hole 311, one end of the sleeve frame 310 is provided with a card slot 312, the inside of the card slot 312 is carded with a card frame 320, one end of the card frame 320 is fixedly connected with a mounting tube 330 connected with the through hole 311, the inside of the mounting tube 330 is embedded with a positioning airbag 340, one end of the positioning airbag 340 is fixedly connected and connected with an extrusion airbag 350, the extrusion airbag 350 is fixedly connected with the extrusion airbag 350, and the extrusion airbag 350 is fixedly connected with the extrusion airbag 350. One end of the compression airbag 350 passes through the interior of the card frame 320, and one end of the compression airbag 350 is fixedly connected to an extrusion block 360 in contact with the card slot 312. The fixer 300 can use high friction to fix the part of the catheter extending out of the urethra. Even if external force pulls the catheter outside the mounting tube 330, this can firmly lock the catheter to avoid the probability of damaging the patient's urethra due to traction, so as to solve the problem of poor anti-traction effect of the existing catheter fixing device with anti-traction function.

[0049] The positioning airbag 340 is in a spiral shape. The positioning airbag 340 is in an expanded state at this time, and the squeezing airbag 350 is in an elastic squeezing state at this time. This can not only increase the contact area between the positioning airbag 340 and the urinary catheter to improve the locking strength of the urinary catheter, but also evenly apply pressure to the urinary catheter to avoid the situation where the urinary catheter is concave and blocked by urine due to concentrated squeezing force; a spiral groove 331 is provided on the inner side of the mounting tube 330, and the positioning airbag 340 is embedded and installed in the inner part of the spiral groove 331, which can not only reduce the probability of the urinary catheter being blocked by the positioning airbag 340 during the initial penetration of the mounting tube 330, but also limit the expansion trend of the positioning airbag 340 to improve the positioning effect of the positioning airbag 340 on the urinary catheter; the horizontal cross-sectional shape of the card frame 320 is concave, and the card groove 312 is The horizontal cross-section is in the shape of a step, and the groove of the card frame 320 is engaged with the convex part of the card slot 312, which can increase the card connection strength between the card frame 320 and the card slot 312, and further improve the stability of the fixation of the urinary catheter; the number of the card slots 312 is four, and the four card slots 312 are distributed in a ring shape around the axis of the through hole 311, and the two adjacent card slots 312 and the axis of the through hole 311 together form a right angle line, which can meet the needs of fixing the urinary catheter in the corresponding direction to meet the patient's needs for fixing the urine bag; the horizontal cross-section of the inner side of the card frame 320 is in the shape of an I-shape, and the horizontal cross-section of the extrusion block 360 is in the shape of an I-shape, and the minimum inner diameter of the inner side of the card frame 320 is set between the two maximum diameters of the extrusion block 360, which can prevent the extrusion block 360 from completely detaching from the card frame 320 to avoid loss;

[0050] When the urethra pulls the catheter under the action of physiological factors, the catheter simultaneously drives the positioning airbag 340 to move, and the positioning airbag 340 is squeezed and contracted accordingly to meet the patient's need for the urethra to pull the catheter due to expansion and contraction when walking, etc., ensuring that the catheter and urethra always remain in a relatively static state, further reducing the probability of the urethra being damaged by the catheter.

[0051] like Figure 3 , Figure 4 and Figure 6 As shown, the inner side of the sleeve frame 310 is provided with an annular cavity 313 connected to the card slot 312, and the fixer 300 also includes a positioning mechanism 370, and the positioning mechanism 370 includes a ring plate 371 slidably connected to the inside of the annular cavity 313, and the other end of the card frame 320 and one end of the extrusion block 360 are both in contact with the ring plate 371, and the other end of the ring plate 371 is fixedly connected with a thorn needle 372, and the tip of the thorn needle 372 penetrates the annular cavity 313 and extends to the inside of the round-shaped connecting strip 200. When the card frame 320 is inserted into the card slot 312, the card frame 320 can actively squeeze the thorn needle 372 out of the annular cavity 313 and pierce the round-shaped connecting strip 200, so as to firmly fix the urinary catheter. The rubber spring 373 is firmly locked in the corresponding position of the circular connecting strip 200, so that the urinary catheter can operate more stably; a rubber spring 373 is arranged between the ring plate 371 and the ring cavity 313, and the rubber spring 373 is always in a compressed state. When the ring plate 371 loses the squeezing force, the rubber spring 373 can actively reset the ring plate 371 and the puncture needle 372, so that the medical staff can freely adjust the position of the sleeve frame 310, and when the clamping frame 320 is clamped with the clamping groove 312, the rubber spring 373 can apply a constant squeezing force to the clamping frame 320 and the squeezing block 360 through the ring plate 371, further improving the stability of the fixation of the urinary catheter;

[0052] When the card frame 320 penetrates into the card slot 312, the card frame 320 drives the extrusion block 360 to synchronously extrude the ring plate 371, and the ring plate 371 drives the puncture needle 372 to penetrate the ring cavity 313 and penetrate into the circular connecting strip 200, which can firmly lock the sleeve frame 310 on the circular connecting strip 200, prevent the sleeve frame 310 from driving the catheter to move, and further reduce the probability of the patient being injured by the catheter traction.

[0053] like Figure 3 and Figure 7 As shown, the fixator 300 further includes a bending guide mechanism 380, which includes a rubber bellows 381 fixedly connected and communicating between the through hole 311 and the mounting tube 330, and stainless steel rings 382 evenly distributed are embedded and installed inside the rubber bellows 381; the inner diameter of the stainless steel ring 382 is larger than the inner diameter of the mounting tube 330, and the maximum diameter of the rubber bellows 381 is larger than the diameter of the stainless steel ring 382, ​​which can ensure that the urinary catheter can pass through the inner side of the rubber bellows 381 normally;

[0054] During the process of bending the catheter by the installation tube 330, the rubber bellows 381 bends synchronously with the installation tube 330, and the rubber bellows 381 drives the stainless steel ring 382 to bend synchronously. At this time, the stainless steel ring 382 can not only support the rubber bellows 381, but also prevent the inner diameter of the rubber bellows 381 from changing to reduce the probability of compressing the catheter. At the same time, the stainless steel ring 382 can also prevent the catheter from bending and deforming, thereby avoiding bending and blockage of the catheter during the bending process, and further ensuring the smooth flow of the catheter.

[0055] Working principle: The urinary catheter is passed through the installation tube 330, the rubber bellows 381 and the through hole 311 in sequence, and is inserted into the patient's urethra at a certain depth. When the insertion of the urinary catheter is completed, the installation tube 330 is bent in a specified direction, and the installation tube 330 drives the urinary catheter to bend accordingly. At the same time, the installation tube 330 drives the clamping frame 320 to be inserted into the clamping slot 312. When the clamping frame 320 is inserted into the clamping slot 312 at a certain depth, the groove of the clamping frame 320 is clamped with the convex part of the clamping slot 312, and the urinary catheter is firmly locked in the corresponding position.

[0056] When the card frame 320 moves into the card slot 312, the extrusion block 360 first contacts the inner wall of the card slot 312, and the extrusion block 360 is squeezed into the card frame 320 by the card slot 312. The extrusion block 360 compresses the extrusion airbag 350, and the air inside the extrusion airbag 350 is squeezed into the positioning airbag 340. The positioning airbag 340 then expands and surrounds and binds the urinary catheter, which can firmly lock the urinary catheter in the installation tube 330. Even if an external force pulls the urinary catheter outside the installation tube 330, the urinary catheter can be firmly locked to avoid the possibility of damaging the patient's urethra due to pulling.

[0057] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A catheter fixing device capable of preventing urinary catheter from being pulled, comprising a buckle belt (100), wherein a circular connecting strip (200) is buckled on the inner side of the buckle belt (100), characterized in that: A fixer (300) is sleeved on the surface of the circular connecting strip (200); The fixer (300) comprises a sleeve frame (310) sleeved on the surface of the circular connecting strip (200), one end of the sleeve frame (310) is provided with a through hole (311), one end of the sleeve frame (310) is provided with a card slot (312), the interior of the card slot (312) is carded with a card frame (320), one end of the card frame (320) is fixedly connected with a mounting tube (330) connected with the through hole (311), a positioning airbag (340) is embedded and installed inside the mounting tube (330), one end of the positioning airbag (340) is fixedly connected and connected with an extrusion airbag (350), one end of the extrusion airbag (350) passes through the interior of the card frame (320), and one end of the extrusion airbag (350) is fixedly connected with an extrusion block (360) in contact with the card slot (312).

2. The anti-pull catheter fixing device according to claim 1, characterized in that: The inner side of the sleeve frame (310) is provided with an annular cavity (313) which is connected with the card slot (312). The fixer (300) further comprises a positioning mechanism (370). The positioning mechanism (370) comprises an annular plate (371) which is slidably connected to the inside of the annular cavity (313). The other end of the card frame (320) and one end of the extrusion block (360) are both in contact with the annular plate (371). The other end of the annular plate (371) is fixedly connected with a needle (372). The tip of the needle (372) penetrates the annular cavity (313) and extends to the inside of the circular connecting strip (200).

3. The anti-pull catheter fixing device according to claim 1, characterized in that: The fixer (300) further comprises a bending guide mechanism (380), wherein the bending guide mechanism (380) comprises a rubber bellows (381) fixedly connected and communicating between the through hole (311) and the mounting tube (330), wherein uniformly distributed stainless steel rings (382) are embedded and installed inside the rubber bellows (381).

4. The anti-pull catheter fixing device according to claim 1, characterized in that: The positioning airbag (340) is in a spiral shape. The positioning airbag (340) is in an expanded state at this time, and the squeezing airbag (350) is in an elastic squeezing state at this time.

5. The anti-pull catheter fixing device according to claim 4, characterized in that: A spiral groove (331) is provided on the inner side of the installation tube (330), and the positioning airbag (340) is embedded and installed inside the spiral groove (331).

6. The anti-pull catheter fixing device according to claim 1, characterized in that: The horizontal cross-sectional shape of the clamping frame (320) is concave, the horizontal cross-sectional shape of the clamping slot (312) is stepped, and the concave portion of the clamping frame (320) is clamped with the convex portion of the clamping slot (312).

7. The anti-pull catheter fixing device according to claim 1, characterized in that: The number of the card slots (312) is four, and the four card slots (312) are distributed in a ring shape around the axis of the through hole (311), and two adjacent card slots (312) and the axis of the through hole (311) together form a right angle line.

8. The anti-pull catheter fixing device according to claim 1, characterized in that: The horizontal cross-sectional shape of the inner side of the clamping frame (320) is an I-shape, the horizontal cross-sectional shape of the extrusion block (360) is an I-shape, and the minimum inner diameter of the inner side of the clamping frame (320) is arranged between the two maximum diameters of the extrusion block (360).

9. The anti-pull catheter fixing device according to claim 2, characterized in that: A rubber spring (373) is provided between the ring plate (371) and the ring cavity (313), and the rubber spring (373) is always in a compressed state.

10. The anti-pull catheter fixing device according to claim 3, characterized in that: The inner diameter of the stainless steel ring (382) is greater than the inner diameter of the mounting tube (330), and the maximum diameter of the rubber bellows (381) is greater than the diameter of the stainless steel ring (382).

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