CN108310592B

CN108310592B - Dialysis catheter fixing device

Info

Publication number: CN108310592B
Application number: CN201810089478.4A
Authority: CN
Inventors: 朱源; 章圣泽; 董芍芍
Original assignee: Wenzhou Peoples Hospital
Current assignee: Wenzhou Peoples Hospital
Priority date: 2018-01-30
Filing date: 2018-01-30
Publication date: 2020-08-14
Anticipated expiration: 2038-01-30
Also published as: CN108310592A

Abstract

The invention discloses a dialysis catheter fixing device which is characterized by comprising a fixing plate capable of being adhered to a human body, wherein a mounting plate is mounted on the fixing plate, a first clamping plate and a second clamping plate are arranged on the mounting plate, the first clamping plate is connected with the mounting plate in a sliding mode, after the first clamping plate slides towards the second clamping plate, a containing cavity for containing a catheter is formed between the first clamping plate and the second clamping plate, after the first clamping plate slides back to the second clamping plate, an inlet-outlet gap for the catheter to enter and exit the containing cavity is reserved between the first clamping plate and the second clamping plate, a notch for the catheter to enter and exit is formed in the mounting plate, a containing pipe is detachably connected onto the fixing plate, a through hole in the containing pipe is arranged opposite to the containing cavity, and the tail of the catheter can stretch into the through hole of the. The device can be with the more stable fixing on the patient of dialysis catheter, and the catheter afterbody need not fix the patient head, need tear the hair when having avoided dialysis catheter and head phase separation, and patient head can free rotation.

Description

Dialysis catheter fixing device

Technical Field

The invention relates to the field of medical equipment, in particular to a dialysis catheter fixing device.

Background

Hemodialysis is the main treatment means of treating acute and chronic renal failure, when adopting the dialysis treatment to the patient, before patient's internal arteriovenous fistula of autologous in vivo matures, mostly adopt hemodialysis temporary catheter as patient's vascular route, hemodialysis temporary catheter puts into the position and has internal jugular vein and femoral vein, generally need to use about 3 months on the human body, therefore the dialysis catheter must be fixed and protected to prevent to take off the pipe and wound infection. The existing fixing mode of the temporary hemodialysis catheter placed in the internal jugular vein is to wrap the catheter at the wound part by medical gauze, then paste the catheter on the skin by a medical adhesive tape, then paste the tail part of the temporary hemodialysis catheter on one side of the head of a patient by an adhesive tape, so as to avoid the problem that the tail part of the temporary hemodialysis catheter exposed outside is too long and is easy to shake or move due to external interference, so as to cause the disconnection and the secondary injury to the wound of the patient, however, after the tail part of the temporary hemodialysis catheter is pasted on one side of the head of the patient by the adhesive tape, the head of the patient rotates every time to drive the tail part of the temporary hemodialysis catheter to move, so as to easily cause the disconnection and the secondary injury to the wound of the patient, so that the head of the patient can not rotate, and if the patient has long hair, the tail part of the temporary hemodialysis catheter is pasted on the hair, when dialysis is performed, the tail of the hemodialysis temporary catheter needs to be separated from the hair, and the hair needs to be torn, which causes pain to the patient.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a dialysis catheter fixing device which can fix a dialysis catheter on a patient more stably, does not need to tear hair when the dialysis catheter is separated from a head, and can enable the head of the patient to rotate freely.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a dialysis catheter fixing device, is including pasting the fixed plate on the human body, install the mounting panel perpendicularly on the fixed plate, be provided with first splint and the second splint that can be close to each other with the centre gripping pipe on the mounting panel, first splint slide with the mounting panel and be connected, first splint slide towards the second splint back that moves, form the chamber that holds that supplies to hold the pipe between first splint and the second splint, first splint slide to the second splint back dorsad, leave the business turn over clearance that supplies the pipe business turn over to hold the chamber between first splint and the second splint, one side that the mounting panel deviates from the fixed plate is equipped with the breach that supplies the pipe business turn over, can dismantle on the fixed plate and be connected with and hold the pipe, hold intraductal through-hole and hold the chamber and become just to setting up, the afterbody of pipe can stretch into in the through-hole that holds the pipe.

As a further improvement of the invention, the first clamping plate and the second clamping plate are both arranged in a semicircular ring shape, the first clamping plate is connected with the mounting plate in a sliding manner through a first clamping plate, the middle end of the first clamping plate is fixedly connected with one side of the first clamping plate, one side of the first clamping plate facing the first clamping plate is convexly provided with two first elastic sheets, the two first elastic sheets are respectively positioned at two sides of the first clamping plate, the front ends of the first elastic sheets extend forwards beyond the front end of the first clamping plate, the outer sides of the first elastic sheets are respectively provided with first ratchets, the second clamping plate is connected with the mounting plate through a second clamping plate, the middle end of the second clamping plate is fixedly connected with the second clamping plate, one side of the second clamping plate facing the second clamping plate is convexly provided with two second elastic sheets, the two second elastic sheets are respectively positioned at two sides of the second clamping plate, and the front ends of the second elastic sheets extend forwards beyond the front end of the second clamping plate, the inner sides of the second elastic pieces are provided with second ratchets matched with the first ratchets, when the first clamping plate drives the first clamping plate to slide towards the second clamping plate, the first elastic pieces continuously stretch into the space between the second elastic pieces and the second clamping plate, and the first ratchets and the second ratchets which are matched with each other can limit the first elastic pieces to slide out from the space between the second elastic pieces and the second clamping plate.

As a further improvement of the invention, a deformation gap for inward bending of the first elastic sheets is reserved between the two first elastic sheets and the first clamping plate.

As a further improvement of the present invention, the second locking plate is connected to the fixed plate in a sliding manner, the sliding direction is a direction close to or away from the mounting plate, a second spring is disposed between the second locking plate and the mounting plate, the second spring is in a compressed state, when the second locking plate slides to a position farthest away from the mounting plate under the elastic force of the second spring, the first locking plate and the second locking plate are located on the same plane, and after the second locking plate slides towards the mounting plate, the first ratchet and the second ratchet are disengaged.

As a further improvement of the invention, a pulling plate is vertically arranged on the mounting plate, the pulling plate is positioned on one side of the first clamping plate, which is opposite to the first clamping plate, a first spring is arranged between the first clamping plate and the first clamping plate, the first spring is in a stretching state, and when the first ratchet and the second ratchet want to be separated, the first clamping plate slides to one side, which is away from the second clamping plate, under the action of the elastic force of the first spring.

As a further improvement of the invention, the first clamping plate is provided with a poking plate which is convenient for sliding the first clamping plate.

As a further improvement of the invention, the accommodating tube is detachably connected with the fixed plate through two mounting seats which are arranged on the fixed plate in parallel, a moving-out gap for moving out the conduit is reserved between the two mounting seats, one opposite side of the two mounting seats is provided with a curved surface matched with the outer side surface of the accommodating pipe, a sliding groove is concavely arranged on at least one curved surface along the length direction of the mounting seat, the outer side surface of the accommodating pipe is convexly provided with a convex strip which can slide in the sliding groove, the length direction of the convex strip is the length direction of the accommodating pipe, the length of the convex strip is the same as that of the sliding groove, one side of the mounting seat facing the mounting plate is provided with a baffle plate, the baffle can block the one end opening of spout, the one side that the mount pad is back to the mounting panel articulates there is a articulated slab, the articulated slab can block or open the other end opening of spout in the turnover process.

As a further improvement of the invention, one side of the mounting seat, which is opposite to the mounting plate, is provided with two limiting pieces, the two limiting pieces are respectively positioned at two sides of the sliding groove, the two limiting pieces and the hinge joint of the hinge plate are arranged in a straight line, the limiting pieces are all arranged in an L shape, one end of each limiting piece is fixedly connected with the mounting plate, the other end of each limiting piece and the mounting plate define a containing groove for the hinge plate to turn over, the openings of the two containing grooves face the same direction, and the limiting pieces just block the opening at one end of the sliding groove when turning.

The invention has the beneficial effects that: through the arrangement of the first clamping plate and the second clamping plate, the dialysis catheter can enter the accommodating cavity between the first clamping plate and the second clamping plate through the in-out gap and the gap on the mounting plate, and then slides to the first clamping plate and the second clamping plate to clamp the dialysis catheter, so that the dialysis catheter is difficult to slide relative to the first clamping plate and the second clamping plate, and the dialysis catheter is difficult to fall off and can be more stably fixed on a patient; through the arrangement of the accommodating tube, because the through hole of the accommodating tube is arranged right opposite to the accommodating cavity, the tail part of the dialysis catheter can be arranged in the through hole of the accommodating tube, at the moment, the tail part of the dialysis catheter cannot shake or move due to external interference easily caused by exposure outside, so that the wound of a patient is influenced, the accommodating tube also plays a role in protecting the dialysis catheter, the dialysis catheter is prevented from being damaged due to collision of foreign objects and the like, when the dialysis treatment is required to be carried out on the patient, the accommodating tube can be firstly dismantled, then the first clamping plate slides towards the second clamping plate in a back-to-back mode, so that the dialysis catheter can be moved out from the device through the gap and the access gap of the mounting plate for dialysis, the tail part of the catheter does not need to be fixed on the head of the patient, hair is prevented from being torn when the catheter is separated from the head for the dialysis treatment, so that the pain of the patient is, the patient's head is thus able to move freely.

Drawings

FIG. 1 is a perspective view of a dialysis catheter fixing device;

FIG. 2 is a schematic plan view of a dialysis catheter fixing device;

FIG. 3 is a schematic view of a connection structure of the first clamping plate and the second clamping plate;

FIG. 4 is a perspective view of the containment tube;

fig. 5 is a schematic perspective view of the mounting seat.

Reference numerals: 1. a fixing plate; 2. mounting a plate; 21. a notch; 22. pulling a plate; 23. a first spring; 3. a first splint; 31. an accommodating chamber; 32. a first clamping plate; 33. a first elastic sheet; 34. a first ratchet; 35. a deformation gap; 36. a poking plate; 4. a second splint; 41. entering and exiting the gap; 42. a second clamping plate; 43. a second elastic sheet; 44. a second ratchet; 45. a second spring; 5. accommodating the tube; 51. a mounting seat; 52. moving out of the gap; 53. a chute; 54. a convex strip; 55. a baffle plate; 56. a hinge plate; 57. a limiting member; 58. and (6) accommodating the tank.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It is noted that the words "front", "rear" and "front" used in the following description,

"left," "right," "upper," and "lower" refer to directions in the drawings, and the words "bottom" and "top," "inner," and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1 to 5, the dialysis catheter fixing device of the present embodiment includes a fixing plate 1 capable of being adhered to a human body, a mounting plate 2 vertically installed on the fixing plate 1, a first clamping plate 3 and a second clamping plate 4 capable of approaching each other to clamp a catheter and disposed on the mounting plate 2, the first clamping plate 3 slidably connected to the mounting plate 2, the first clamping plate 3 slidably moved toward the second clamping plate 4, a containing cavity 31 for containing the catheter is formed between the first clamping plate 3 and the second clamping plate 4, after the first clamping plate 3 slides back to the second clamping plate 4, leave the business turn over clearance 41 that supplies the pipe business turn over to hold chamber 31 between first splint 3 and the second splint 4, one side that mounting panel 2 deviates from fixed plate 1 is equipped with the breach 21 that supplies the pipe business turn over, can dismantle on fixed plate 1 to be connected with and hold pipe 5, holds the through-hole in the pipe 5 and holds chamber 31 and just to setting up, and the afterbody of pipe can stretch into in the through-hole that holds pipe 5.

An adhesive layer can be arranged on one surface of the fixing plate 1, which is in contact with a human body, when the medical staff use the medical staff, firstly, the oily paper on the outer side of the adhesive layer is torn off, then the fixing plate 1 is adhered to the human body and can be reinforced through a medical adhesive tape, and the adhering position is close to a wound; wrapping the catheter at the wound with medical gauze, and adhering it to skin with medical adhesive tape; through the arrangement of the first clamping plate 3 and the second clamping plate 4, the dialysis catheter can enter the accommodating cavity 31 between the first clamping plate 3 and the second clamping plate 4 through the access gap 41 and the gap 21 on the mounting plate 2, and then the first clamping plate 3 slides to the first clamping plate 3 and the second clamping plate 4 to clamp the dialysis catheter, at the moment, the dialysis catheter is difficult to slide relative to the first clamping plate 3 and the second clamping plate 4, so that the dialysis catheter is difficult to be taken off and can be more stably fixed on a patient; through the arrangement of the accommodating tube 5, because the through hole of the accommodating tube 5 is arranged right opposite to the accommodating cavity 31, the tail part of the dialysis catheter can be arranged in the through hole of the accommodating tube 5, at the moment, the tail part of the dialysis catheter cannot shake or move easily due to external interference because of being exposed outside, so that the wound of a patient is influenced, the accommodating tube 5 also plays a role in protecting the dialysis catheter, the dialysis catheter is prevented from being damaged due to collision of foreign objects and the like, when dialysis treatment is required to be carried out on the patient, the accommodating tube 5 can be firstly dismantled, then the first clamping plate 3 slides towards the second clamping plate 4 in a back direction, so that the dialysis catheter can be moved out of the device for dialysis through the gap 21 and the access gap 41 of the mounting plate 2, the tail part of the catheter does not need to be fixed on the head of the patient, hair is prevented from being torn when the catheter is separated from the head for dialysis treatment, and the rotation of the head of the patient does not influence the fixation of the catheter, so that the head of the patient can move freely.

As a modified embodiment, the first clamping plate 3 and the second clamping plate 4 are both configured to be semi-circular, the first clamping plate 3 is slidably connected with the mounting plate 2 through a first clamping plate 32, the middle end of the first clamping plate 3 is fixedly connected with one side of the first clamping plate 32, one side of the first clamping plate 32 facing the first clamping plate 3 is convexly provided with two first elastic sheets 33, the two first elastic sheets 33 are respectively located at both sides of the first clamping plate 3, the front end of the first elastic sheet 33 extends forwards beyond the front end of the first clamping plate 32, the outer sides of the first elastic sheets 33 are respectively provided with a first ratchet 34, the second clamping plate 4 is connected with the mounting plate 2 through a second clamping plate 42, the middle end of the second clamping plate 4 is fixedly connected with the second clamping plate 42, one side of the second clamping plate 42 facing the second clamping plate 4 is convexly provided with two second elastic sheets 43, the two second elastic sheets 43 are respectively located at both sides of the second clamping plate 4, and the front ends of the second elastic sheets 43 extend forwards beyond the front end of the second clamping plate 42, the inner sides of the second elastic pieces 43 are provided with second ratchets 44 matched with the first ratchets 34, when the first clamping plate 32 drives the first clamping plate 3 to slide towards the second clamping plate 4, the first elastic pieces 33 continuously extend into the space between the second elastic pieces 43 and the second clamping plate 4, and the first ratchets 34 and the second ratchets 44 which are matched with each other can limit the first elastic pieces 33 to slide out from the space between the second elastic pieces 43 and the second clamping plate 4.

The first clamping plate 3 and the second clamping plate 4 are arranged to be semicircular rings matched with the outer contour of the catheter, so that the contact area between the first clamping plate 3 and the catheter and the contact area between the second clamping plate 4 and the catheter can be increased, the connection between the first clamping plate 3 and the second clamping plate 4 is more tight after the catheter is clamped, through the arrangement of the first clamping plate 32, the first elastic sheet 33, the first ratchet 34, the second clamping plate 42, the second elastic sheet 43 and the second ratchet 44, when the first clamping plate 32 slides to drive the first clamping plate 3 to slide towards the second clamping plate 4, the first elastic sheet 33 continuously extends into the space between the second elastic sheet 43 and the second clamping plate 4, at the moment, the second elastic sheet 43 can deform outwards under the thrust action of the first elastic sheet 33, so that the second ratchet 44 cannot block the movement of the first ratchet 34, and after the dialysis catheter is clamped and fastened by the first clamping plate 3 and the second clamping plate 4, the first ratchet 34 cannot retreat due to the limitation of the second ratchet 44, therefore, the first elastic sheet 33 will not automatically slip out from between the second elastic sheet 43 and the second splint 4, and thus the dialysis catheter will not be actively loosened after the first splint 3 and the second splint 4 clamp the dialysis catheter, resulting in a decrease in the connection tightness between the dialysis catheter and the human body.

As a modified specific embodiment, a deformation gap 35 for bending the first elastic sheet 33 inwards is reserved between the two first elastic sheets 33 and the first clamping plate 3. Through the setting in deformation clearance 35 for when first cardboard 32 drives first splint 3 and slides towards second splint 4, when first flexure strip 33 constantly stretches into between second flexure strip 43 and the second splint 4 promptly, first flexure strip 33 can be gone up the thrust effect of ratchet and is gone up to inboard deformation under the second flexure strip 43, and the first flexure strip 33 sliding of being convenient for is further shifted to between second flexure strip 43 and the second splint 4, makes medical staff's first cardboard 32 of sliding more laborsaving.

As an improved specific embodiment, the second locking plate 42 is connected to the fixed plate 1 in a sliding manner, the sliding direction is a direction close to or away from the mounting plate 2, a second spring 45 is arranged between the second locking plate 42 and the mounting plate 2, the second spring 45 is in a compressed state, when the second locking plate 42 slides to a farthest position away from the mounting plate 2 under the elastic force of the second spring 45, the first locking plate 32 and the second locking plate 42 are located on the same plane, and after the second locking plate 42 slides towards the mounting plate 2, the first ratchet 34 is separated from the second ratchet 44.

Through second cardboard 42 and fixed plate 1 sliding connection, and be provided with second spring 45 between second cardboard 42 and mounting panel 2, make when medical staff presses second cardboard 42 and drives second cardboard 42 towards the mounting panel 2 motion, first ratchet 34 can want to break away from with second ratchet 44, make first flexure strip 33 can follow and shift out between second flexure strip 43 and the second splint 4, medical staff can slide first cardboard 32 and make first splint 3 slide to second splint 4 dorsad, so that take out the dialysis catheter, and when medical staff no longer pressed second cardboard 42, because the elastic action of second spring 45, second cardboard 42 can automatic re-setting to with first cardboard 32 coplanar, when being convenient for press from both sides tight dialysis catheter next time, first ratchet 34 can mutually support with second ratchet 44.

As an improved specific embodiment, the mounting plate 2 is vertically provided with a pulling plate 22, the pulling plate 22 is located on a side of the first clamping plate 32, which is opposite to the first clamping plate 3, a first spring 23 is arranged between the first clamping plate 32 and the first clamping plate 3, the first spring 23 is in a stretching state, and when the first ratchet 34 and the second ratchet 44 want to be disengaged, the first clamping plate 3 slides to a side away from the second clamping plate 4 under the elastic force of the first spring 23.

Through the arrangement of the pulling plate 22 and the first spring 23, when the first ratchet 34 is separated from the second ratchet 44, the first clamping plate 32 can automatically slide back to the second clamping plate 42 under the elastic action of the first spring 23, so that when a patient is treated by dialysis, medical staff does not need to manually slide the first clamping plate 32, and the operation of the medical staff is facilitated.

As a modified embodiment, the first chucking plate 32 is provided with a dial plate 36 for facilitating sliding movement of the first chucking plate 32. The poking plate 36 can be arranged on the side of the first clamping plate 32 opposite to the mounting plate 2 or above the first clamping plate 32, and through the arrangement of the poking plate 36, the medical staff can poke the poking plate 36 to drive the first clamping plate 32 to slide, so that the medical staff can slide the first clamping plate 32 conveniently.

As a modified embodiment, the accommodating tube 5 is detachably connected to the fixing plate 1 by two mounting seats 51, the mounting seats 51 are arranged in parallel on the fixing plate 1, and a moving-out gap 52 for moving out the conduit is reserved between the two installation seats 51, opposite sides of the two installation seats 51 are respectively set to be curved surfaces matched with the outer side surfaces of the accommodating tubes 5, a sliding groove 53 is concavely arranged on at least one curved surface along the length direction of the installation seat 51, convex strips 54 capable of sliding in the sliding grooves 53 are convexly arranged on the outer side surfaces of the accommodating tubes 5, the length direction of the convex strips 54 is the length direction of the accommodating tubes 5, the length of the convex strips 54 is the same as that of the sliding grooves 53, a baffle plate 55 is arranged on one side of the installation seat 51 facing the installation plate 2, one end opening of the sliding groove 53 can be blocked by the baffle plate 55, a hinged plate 56 is hinged to one side of the installation seat 51 facing away from the installation plate 2, and the.

The distance between the two mounting seats 51 is set to be that when the accommodating tube 5 is positioned between the two mounting seats 51, the two mounting seats 51 are abutted against the accommodating tube 5, through the arrangement of the mounting seats 51, the sliding groove 53, the protruding strip 54 and the hinge plate 56, when a medical staff installs the accommodating tube 5, the protruding strip 54 is aligned with the sliding groove 53, so that the protruding strip 54 slides into the sliding groove 53, at the moment, the accommodating tube 5 slides into the two mounting seats 51, when the protruding strip 54 slides to be abutted against the baffle plate 55, the hinge plate 56 blocks the opening of the sliding groove 53 by rotating the hinge plate 56, because the length of the protruding strip 54 is equal to that of the sliding groove 53, under the blocking action of the baffle plate 55 and the hinge plate 56, the protruding strip 54 cannot slide, and the side surface of the sliding groove 53 also has the blocking action on the protruding strip 54, so that the accommodating tube 5 cannot rotate or move, the accommodating tube 5 can be stably fixed on the, the detachable connection between the accommodating pipe 5 and the fixing plate 1 is realized through the structure, the structure is simple and practical, and the connection stability is good.

As an improved specific embodiment, two limiting members 57 are disposed on a side of the mounting base 51 facing away from the mounting plate 2, the two limiting members 57 are respectively located on two sides of the sliding slot 53, the two limiting members 57 and the hinge joint of the hinge plate 56 are disposed in a straight line, the limiting members 57 are all disposed in an "L" shape, one end of each limiting member 57 is fixedly connected to the mounting plate 2, the other end of each limiting member 57 and the mounting plate 2 define a receiving slot 58 for the hinge plate 56 to enter in a turning manner, openings of the two receiving slots 58 face the same direction, and the limiting members 57 just block the opening at one end of the sliding slot 53.

Through the arrangement of the limiting piece 57, when the hinge plate 56 is turned over to be blocked by the limiting piece 57, the opening of the sliding groove 53 can be just blocked, and the limiting piece 57 arranged in an L shape can reinforce the hinge plate 56, so that when the hinge plate 56 is subjected to the force of the convex strip 54 on the accommodating pipe 5 deviating from one side of the mounting plate 2, the hinge plate 56 can be abutted against the limiting piece 57, and the hinge plate 56 is prevented from being damaged due to overlarge stress when the hinge plate 56 alone bears thrust.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A dialysis catheter securement device characterized by: including can paste fixed plate (1) on the human body, install mounting panel (2) perpendicularly on fixed plate (1), be provided with on mounting panel (2) and be close to first splint (3) and second splint (4) with the centre gripping pipe each other, first splint (3) slide with mounting panel (2) and be connected, first splint (3) are towards second splint (4) slip back, form between first splint (3) and second splint (4) and supply the chamber (31) that holds the pipe, first splint (3) are the back to second splint (4) slip back, leave business turn over clearance (41) that supply pipe business turn over to hold chamber (31) between first splint (3) and second splint (4), one side that mounting panel (2) deviate from fixed plate (1) is equipped with breach (21) that supply pipe business turn over, the fixing plate (1) is detachably connected with a containing pipe (5), a through hole in the containing pipe (5) and a containing cavity (31) are arranged just opposite to each other, the tail part of a guide pipe can extend into the through hole of the containing pipe (5), the first clamping plate (3) and the second clamping plate (4) are both in a semicircular shape, the first clamping plate (3) is connected with the mounting plate (2) in a sliding manner through a first clamping plate (32), the middle end of the first clamping plate (3) is fixedly connected with one side of the first clamping plate (32), two first elastic sheets (33) are convexly arranged on one side, facing the first clamping plate (3), of the first clamping plate (32), the two first elastic sheets (33) are respectively positioned on two sides of the first clamping plate (3), the front ends of the first elastic sheets (33) extend forwards to exceed the front end of the first clamping plate (32), and first ratchets (34) are arranged on the outer sides of the first elastic sheets (33), the second clamping plate (4) is connected with the mounting plate (2) through a second clamping plate (42), the middle end of the second clamping plate (4) is fixedly connected with the second clamping plate (42), two second elastic pieces (43) are convexly arranged on one side, facing the second clamping plate (4), of the second clamping plate (42), the two second elastic pieces (43) are respectively located on two sides of the second clamping plate (4), the front ends of the second elastic pieces (43) extend forwards to exceed the front end of the second clamping plate (42), second ratchets (44) matched with the first ratchet pieces (34) are arranged on the inner sides of the second elastic pieces (43), when the first clamping plate (32) drives the first clamping plate (3) to slide towards the second clamping plate (4), the first ratchet pieces (33) continuously extend into the space between the second elastic pieces (43) and the second clamping plate (4), and the first ratchet pieces (34) and the second ratchet pieces (44) which are matched with each other can limit the first ratchet pieces (33) from the second elastic pieces (43) ) And the second clamping plate (4) slides out.

2. A dialysis catheter securement device according to claim 1, wherein: deformation gaps (35) for inward bending of the first elastic sheets (33) are reserved between the two first elastic sheets (33) and the first clamping plate (3).

3. A dialysis catheter securement device according to claim 2, wherein: the second clamping plate (42) is connected with the fixed plate (1) in a sliding mode, the sliding direction of the second clamping plate is close to or far away from the mounting plate (2), a second spring (45) is arranged between the second clamping plate (42) and the mounting plate (2), the second spring (45) is in a compressed state, the second clamping plate (42) slides under the elastic action of the second spring (45) to the farthest position away from the mounting plate (2), the first clamping plate (32) and the second clamping plate (42) are located on the same plane, and after the second clamping plate (42) slides towards the mounting plate (2), the first ratchet (34) and the second ratchet (44) are separated from each other.

4. A dialysis catheter securement device according to claim 3, wherein: the mounting plate (2) is vertically provided with a pulling plate (22), the pulling plate (22) is located on one side, back to the first clamping plate (3), of the first clamping plate (32), a first spring (23) is arranged between the first clamping plate (32) and the first clamping plate (3), the first spring (23) is in a stretching state, and when the first ratchet (34) and the second ratchet (44) are separated, the first clamping plate (3) slides to one side, away from the second clamping plate (4), under the elastic force action of the first spring (23).

5. A dialysis catheter fixing device according to any one of claims 1 to 4, wherein: the first clamping plate (32) is provided with a poking plate (36) which is convenient for sliding the first clamping plate (32).

6. A dialysis catheter securement device according to claim 1, wherein: the accommodating pipe (5) is detachably connected with the fixed plate (1) through two mounting seats (51), the mounting seats (51) are arranged on the fixed plate (1) in parallel, a moving-out gap (52) for moving out a guide pipe is reserved between the two mounting seats (51), opposite sides of the two mounting seats (51) are respectively arranged to be curved surfaces matched with the outer side surfaces of the accommodating pipe (5), a sliding groove (53) is formed in at least one curved surface along the length direction of the mounting seats (51), a protruding strip (54) capable of sliding in the sliding groove (53) is convexly arranged on the outer side surface of the accommodating pipe (5), the length direction of the protruding strip (54) is the length direction of the accommodating pipe (5), the length of the protruding strip (54) is the same as that of the sliding groove (53), a baffle plate (55) is arranged on one side of the mounting seat (51) facing the mounting plate (2), and one end opening of the sliding groove (53) can be blocked by the baffle plate (55), one side of the mounting seat (51) back to the mounting plate (2) is hinged with a hinged plate (56), and the hinged plate (56) can block or open the opening at the other end of the sliding groove (53) in the overturning process.

7. The dialysis catheter fixing device according to claim 6, wherein: one side of the mounting seat (51) back to the mounting plate (2) is provided with two limiting parts (57), the two limiting parts (57) are respectively located at two sides of the sliding groove (53), the hinging positions of the two limiting parts (57) and the hinged plate (56) form a straight line, the limiting parts (57) are arranged in an L shape, one end of each limiting part (57) is fixedly connected with the mounting plate (2), the other end of each limiting part (57) and the mounting plate (2) enclose a containing groove (58) for the hinged plate (56) to turn into, the opening directions of the two containing grooves (58) are the same, and the limiting parts (57) just block one end opening of the sliding groove (53) when turning into the containing grooves (58).