CN114010914A - Children hemodialysis pipe fixing device - Google Patents

Abstract

The invention relates to a hemodialysis catheter technology, which is used for solving the problems that the fixed position of a fixing device of a hemodialysis catheter is limited, the hemodialysis catheter is easy to deform after being fixed, the transmission of dialysate is influenced, the coverage area of a connecting belt is large, and discomfort is easy to cause; the invention further tightens for fixing the position by the driving of the supporting frame after the rubber band belt is tightened, so that the fixable position of the hemodialysis catheter is not limited by the hemodialysis catheter fixing device, the hemodialysis catheter is protected by adjusting the length of the telescopic sleeve under the control of ventilation, the hemodialysis catheter is prevented from being damaged, and the air generated after the air bag on the rubber band belt expands does not influence the heat dissipation of the covered area of the rubber band belt.

Description

Children hemodialysis pipe fixing device

Technical Field

The invention relates to a hemodialysis catheter technology, in particular to a fixing device for a hemodialysis catheter for children.

Background

Hemodialysis is a process of draining in-vivo blood to the outside of the body, performing substance exchange between the blood and electrolyte solution with similar body concentration inside and outside one hollow fiber by a dialyzer consisting of a plurality of hollow fibers through the principles of dispersion, ultrafiltration, adsorption and convection, removing in-vivo metabolic wastes, maintaining the balance of electrolytes and acid and alkali, simultaneously removing excessive water in the body, and returning the purified blood.

In the prior art, most of fixing equipment of hemodialysis catheters is designed according to fixed positions, so that the hemodialysis catheters can only be fixed at corresponding positions, the placement positions of the hemodialysis catheters can be selected at three positions, namely internal jugular veins, femoral veins and subclavian veins, according to actual conditions, and the hemodialysis catheter fixing equipment which is designed specifically for a certain position is difficult to fix the corresponding position according to actual requirements, so that inconvenience is brought to medical staff; after the hemodialysis catheter is connected with the body surface of a patient, the hemodialysis catheter is easily extruded and deformed due to the body movement of the patient, the space in which the substances can circulate is reduced, the flow rate of dialysate for hemodialysis operation is adversely affected, and the hemodialysis catheter is exposed in the external environment and is easily damaged and broken due to negligence of the patient, so that external dirt is easily introduced into the body of the patient from the broken position of the hemodialysis catheter, and the body health of the patient is affected; a fixed equipment for fixing hemodialysis pipe position can not take place the condition that the slip leads to the position to remove for guaranteeing the frictional force between the patient health surface greatly, makes fixed equipment's connecting band and the surperficial contact surface of patient's health great, and under the higher condition of external environment temperature, the regional circulation of air of connecting band coverage is not smooth, and the heat that self produced is difficult to scatter and disappear because of the cover of connecting band, easily causes the discomfort for the patient.

In view of the above technical problem, the present application proposes a solution.

Disclosure of Invention

The invention aims to tighten the rubber band for fixing the position again under the driving of the supporting frame after the rubber band is tightened, so that the fixable position of the hemodialysis catheter is not limited by the hemodialysis catheter fixing device, the hemodialysis catheter is protected by adjusting the length of the telescopic sleeve under the control of ventilation, the hemodialysis catheter is prevented from being damaged, air generated after an air bag on the rubber band is expanded does not influence the heat dissipation of a rubber band covering area, and the problems that the fixed position of fixing equipment of the hemodialysis catheter is limited, the hemodialysis catheter is easy to deform after being fixed to influence dialysate transmission, and the covering area of a connecting band is large and the discomfort is easy to cause are solved, so that the children hemodialysis catheter fixing device is provided.

The purpose of the invention can be realized by the following technical scheme:

a children hemodialysis catheter fixing device comprises a dialysis catheter bifurcation block and a static and dynamic vessel, wherein the static and dynamic vessel is connected to two sides of the front surface of the dialysis catheter bifurcation block, and a connecting mechanism is arranged on one side of the outer side wall of the dialysis catheter bifurcation block;

the connecting mechanism comprises a containing box, one side of the outer side wall of the containing box is connected with a rubber band, a support shaft is rotatably connected to the middle position of the rear surface in the containing box, a linkage cavity is integrally formed on one side of the outer side wall of the containing box, a flat spiral spring is connected to the position, corresponding to the support shaft, of the front surface in the containing box, a first baffle is connected to the position, close to the flat spiral spring, of the outer side wall of the support shaft, a ratchet wheel is connected to the position, corresponding to the support shaft, of the rear surface in the containing box, a transmission belt is connected to the position, close to the rear side of the ratchet wheel, of the outer side wall of the containing box, a hook is rotatably connected to the position, corresponding to the ratchet wheel, of the inner side wall of the containing box through a rotating seat, a traction rope is connected to the upper portion of the outer side wall of the hook, and a second spring is connected to the position, corresponding to the traction rope, of the inner side wall of the containing box;

the linkage cavity is characterized in that a first screw rod is rotatably connected to the middle position of the rear surface inside the linkage cavity, a supporting frame is slidably connected to the position of the front surface of the linkage cavity, which corresponds to the first screw rod, a first spring is utilized to the position of the front surface of the linkage cavity, which corresponds to the supporting frame, a second baffle is connected to the position of the inner side wall of the linkage cavity, which corresponds to the first screw rod, a movable drum is slidably connected to one side of the outer side wall of the first screw rod, which is close to the second baffle, a fixed drum is rotatably connected to the position of the outer side wall of the first screw rod, which corresponds to the movable drum, and a first supporting plate is connected to the position of the inner side wall of the linkage cavity, which corresponds to the fixed drum.

As a preferred embodiment of the present invention, a protection mechanism is provided on the front surface of the storage box;

the protection mechanism comprises a second supporting plate, limiting rods are connected to four corner positions of the outer side wall of the second supporting plate, a second screw rod is connected to the middle position of the second supporting plate in a rotating mode, the outer side wall of the second screw rod is connected with a movable plate in a sliding mode, one end, close to the second screw rod, of the linkage cavity is connected with a second gear, the front surface of the linkage cavity corresponds to the position of the first screw rod, a first gear is connected to the position of the first screw rod through a connecting shaft, one side, close to the second screw rod, of the outer side wall of the movable plate is connected with a first telescopic hose, the outer side wall of the second supporting plate corresponds to the position of the first telescopic hose, and the front surface of a bifurcate block of the dialysis tube corresponds to the position of the static and dynamic vessel and is connected with a telescopic tube.

As a preferred embodiment of the present invention, the outer side wall of the second support plate is provided with a sweat-proof mechanism;

the sweat-proof mechanism includes the second connecting pipe, the second backup pad lateral wall corresponds second connecting pipe position department is connected with the second expansion hose, rubber band outband lateral wall one side is connected with a plurality of evenly distributed's gasbag, rubber band area lateral wall opposite side corresponds gasbag position department is connected with communicating pipe, communicating pipe lateral wall one side is connected with the breather valve, rubber band area lateral wall opposite side corresponds two gasbag intermediate position department is connected with first spout, first spout inside wall sliding connection has first slider.

As a preferred embodiment of the invention, a sliding hole is formed in the position, corresponding to the rubber band, of the outer side wall of the containing box, the size of the sliding hole is the same as the size of the cross section of the rubber band, a connecting cavity is connected to one side, away from the containing box, of the outer side wall of the bifurcate block of the dialysis tube, a connecting piece is connected to one end, corresponding to the connecting cavity, of the rubber band, and the size of the connecting piece is larger than that of the sliding block.

As a preferred embodiment of the invention, a cavity is formed in the telescopic tube, a sealing gasket is connected to the inner wall of the cavity, a plurality of third springs which are uniformly distributed are connected to the middle position of the lower surface in the cavity, and an exhaust valve is connected to one side of the upper surface of the telescopic tube.

In a preferred embodiment of the present invention, a second sliding groove is formed above both sides of the inner side wall of the first sliding groove, and a second sliding block is integrally formed above both sides of the outer side wall of the first sliding block at a position corresponding to the second sliding groove.

As a preferred embodiment of the present invention, the two second support plates are connected to a one-way valve at positions corresponding to the second flexible hose and the first flexible hose, the outer side walls of the second flexible hose and the first flexible hose are connected to a connection ring at positions corresponding to the position of the limiting rod, and the inner diameter of the connection ring is larger than the outer diameter of the limiting rod.

As a preferred embodiment of the invention, the use method of the children hemodialysis catheter fixing device comprises the following steps:

the method comprises the following steps: when a medical worker performs hemodialysis operation on children, the rubber band can be pulled out of the storage box through the connecting piece at one end of the rubber band after the traction rope is dragged to the outer side of the storage box, the flat spiral spring is compressed in the pulling process, the connecting piece at one end of the rubber band is butted with the connecting cavity after the rubber band surrounds the forked block of the dialysis tube for a circle, more rubber bands pulled out after the butting are contracted into the storage box under the action of the resilience force of the flat spiral spring and are wound by the supporting shaft, the medical worker can slide on the surface of the interlocking cavity by pressing the supporting frame, one end of the supporting frame slides to the inner side of the interlocking cavity on the first screw rod, in the sliding process, the first spring is stretched, and the sliding piece at the inner side of the supporting frame and the first screw rod interact to drive the first screw rod to rotate in the sliding process of the supporting frame, the support frame drives the first screw rod to rotate reversely in the rebounding process of the first spring, when the support frame rotates forwards, the movable rotary drum rotates along with the first screw rod and slides to the position of the fixed rotary drum through mutual friction between the movable rotary drum and the first screw rod, the fixed rotary drum is driven to rotate after being mutually embedded with one end of the fixed rotary drum, the fixed rotary drum drives the support shaft to rotate through the transmission belt, the support shaft further winds the rubber band, the rubber band is tightly attached to the surface of the body of a child, the traction rope is loosened, the hook is reset under the action of the second spring to limit the ratchet wheel, and the ratchet wheel integrally formed with the support shaft is limited by the hook, so that the rotation of the support shaft is limited;

step two: the front surface of the dialysis tube bifurcation block is communicated with a first telescopic hose at one side of a second support plate through a first connecting pipe, a first gear is connected with a first screw rod through a rotating shaft and rotates along with the first screw rod, the first gear drives a second gear which is perpendicular to the first gear and is embedded with the first gear to rotate in the rotating process, when the second gear connected with the second screw rod rotates, a movable plate connected with the outer side wall of the second screw rod through a sliding part slides in position, and the movable plate reciprocates on the outer side wall of the second screw rod in the forward and reverse rotating process of the first gear, so that the first telescopic hose transmits outside air to a cavity inside the telescopic hose along the first connecting pipe in the contraction and stretching process, a sleeve inside the cavity slides outwards under the action of air pressure, and the telescopic hose extends to protect a static and dynamic vessel, in the extension process of the telescopic sleeve, a third spring connected inside the telescopic sleeve is extended;

step three: medical personnel can carry out the slip of position in first spout inboard with the first slider that corresponds containing box position department on the rubber band area of pulling out, make first slider card establish on communicating pipe lateral wall, it is tensile to drive the shrink of second expansion hose among the fly leaf reciprocating motion process, make the second expansion hose transmit outside air to communicating pipe inside along the second connecting pipe, and fill the inside gasbag that makes that gets into the correspondence from communicating pipe position department and swell, and communicating pipe one end receives the card of first slider to establish to block and can not transmit the air to containing box inboard along communicating pipe, there is the space gasbag bloated support rubber band and children's health surface, the vent valve that one end was served communicating pipe is closed to the back.

Compared with the prior art, the invention has the beneficial effects that:

1. the rubber band is stretched under the action of the flat spiral spring and then is automatically rolled and attached to the surface of the skin of a patient, the first screw rod is driven to rotate by the supporting frame, the first screw rod drives the supporting shaft to rotate by the driving belt, so that the supporting shaft rolls the rubber band again, the rubber band and the skin of the patient are attached more tightly, the rubber band is not easy to drop and the position of the rubber band deviates, and the hemodialysis catheter can be fixed at each position of the body of the patient in the mode and is less limited;

2. the length of the telescopic tube is adjusted under the control of the ventilation of the first telescopic hose, so that the telescopic tube protects the hemodialysis catheter, the hemodialysis catheter is not easy to deform and bend under pressure to influence the circulation of internal dialysate, and the hemodialysis catheter is prevented from being damaged and broken to cause the condition that external dirt enters the body of a patient along the hemodialysis catheter;

3. the air bag on the rubber band after being connected and fixed can be expanded after the second flexible hose introduces air, so that a gap is formed between the rubber band and the skin surface of a patient, the circulation of air is facilitated, the discomfort of the patient caused by high outside air temperature is prevented, and the expansion of the air bag does not influence the position fixation of the rubber band.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a main body structure view of the present invention;

FIG. 2 is a view of the coupling mechanism of the present invention;

FIG. 3 is a view showing the construction of a flat spiral spring according to the present invention;

FIG. 4 is a view showing the construction of the ratchet of the present invention;

FIG. 5 is an enlarged view of the portion A of FIG. 4 according to the present invention;

FIG. 6 is a view of the guard mechanism of the present invention;

FIG. 7 is an internal structure view of the telescopic tube of the present invention;

FIG. 8 is a structural view of the antiperspirant mechanism of the present invention;

FIG. 9 is a view of the construction of the present invention for a bungee belt;

fig. 10 is a view showing a structure of a first chute of the present invention.

In the figure: 1. a dialysis tubing bifurcation block; 2. a connecting mechanism; 21. a rubber band; 22. a connecting cavity; 23. a storage box; 24. a flat spiral spring; 25. a first baffle plate; 26. a first spring; 27. a support frame; 28. a first screw; 29. a second baffle; 210. a linkage cavity; 211. a movable drum; 212. a hauling rope; 213. a support shaft; 214. a first support plate; 215. fixing the rotary drum; 216. a transmission belt; 217. a ratchet wheel; 218. hooking; 219. a rotating seat; 220. a second spring; 3. a static and dynamic vessel; 4. a protection mechanism; 41. a telescopic sleeve; 42. a second support plate; 43. a limiting rod; 44. a second screw; 45. a second gear; 46. a first gear; 47. a movable plate; 48. a first flexible hose; 49. an exhaust valve; 410. a third spring; 411. a first connecting pipe; 5. a sweat-resistant mechanism; 51. a second flexible hose; 52. an air bag; 53. a vent valve; 54. a second connecting pipe; 55. a communicating pipe; 56. a first chute; 57. a first slider.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1-5, a catheter fixing device for children hemodialysis comprises a dialysis tube bifurcation block 1 and a static and dynamic vessel 3, wherein the static and dynamic vessel 3 is connected to two sides of the front surface of the dialysis tube bifurcation block 1;

the connecting mechanism 2 is arranged on one side of the outer side wall of the dialysis tube branching block 1, the connecting mechanism 2 comprises a storage box 23, one side of the outer side wall of the storage box 23 is connected with a rubber band belt 21, the width of the rubber band belt 21 is smaller than that of the storage box 23, the rubber band belt 21 can be stored in the storage box 23 in a roll shape, a support shaft 213 is rotatably connected with the middle position of the rear surface in the storage box 23, one end of the rubber band belt 21 is connected on the outer side wall of the support shaft 213, the support shaft 213 can roll the rubber band belt 21 in the rotating process, a linkage cavity 210 is integrally formed on one side of the outer side wall of the storage box 23, a flat spiral spring 24 is connected with the position, corresponding to the support shaft 213, of the front surface in the storage box 23, one end of the flat spiral spring 24 is connected on the inner side wall of the storage box 23, the other end is connected on the outer side wall of the support shaft 213, and the flat spiral spring 24 can be driven to curl when the support shaft 213 rotates, the outer side wall of the supporting shaft 213 is connected with a first baffle 25 near the flat spiral spring 24, the first baffle 25 makes the moving range of the flat spiral spring 24 between the first baffle 25 and the inner wall of the containing box 23, no position deviation occurs, the back surface inside the containing box 23 is connected with a ratchet wheel 217 corresponding to the supporting shaft 213, the outer side wall of the supporting shaft 213 is connected with a transmission belt 216 near the rear of the ratchet wheel 217, the middle position inside the containing box 23 corresponding to the transmission belt 216 is connected with a hydraulic push rod, one end of the hydraulic push rod is connected to the transmission belt 216 through a sliding frame, the height adjusting rod of the hydraulic push rod is positioned outside the containing box 23, which is convenient for medical personnel to adjust the height of the hydraulic push rod, the supporting shaft 213 connected with the ratchet wheel 217 and the first screw 28 are transmitted through the transmission belt 216, and the position inside the side wall of the containing box 23 corresponding to the ratchet wheel 217 is connected with a hook 218 through a rotating seat 219, a traction rope 212 is connected above the outer side wall of the hook 218, a second spring 220 is connected to the position, corresponding to the traction rope 212, of the inner side wall of the containing box 23, the hook 218 is connected to the inner side of the rotating seat 219 through a rotating shaft, the other end of the second spring 220 connected to the outer side wall is connected to the inner side wall of the containing box 23, and a hole is formed in the position, corresponding to the traction rope 212, of the containing box 23, so that the traction rope 212 can pass through the hole and extend to the outer side of the containing box 23;

a first screw 28 is rotatably connected to the middle position of the rear surface inside the linkage cavity 210, a support frame 27 is slidably connected to the position of the front surface of the linkage cavity 210 corresponding to the first screw 28, a sliding hole with the same size as the first screw 28 is formed in one side of the support frame 27 inside the containing box 23, the support frame 27 is connected to the first screw 28 through a sliding member in the sliding hole, when the support frame 27 slides under the restriction of the containing box 23, the first screw 28 is driven to rotate through the interaction between the sliding member and the first screw 28, the support frame 27 rotates in one direction when sliding towards the inside of the containing box 23, when the support frame 27 slides towards the outside of the containing box 23 under the action of a first spring 26, the support frame rotates in the opposite direction, the first spring 26 is utilized at the position of the support frame 27 corresponding to the two sides of the front surface inside the linkage cavity 210, a second baffle 29 is connected to the position of the inner side wall of the linkage cavity 210 corresponding to the first screw 28, the second baffle 29 limits the moving range of the movable drum 211, so that the movable drum 211 can only move between the second baffle 29 and the fixed drum 215, the side of the outer side wall of the first screw 28 close to the second baffle 29 is slidably connected with the movable drum 211, the inner diameter of the drum inside the movable drum 211 is the same as the outer diameter of the first screw 28, and slides on the first screw 28 through the sliding piece connected on the inner side wall, the drum inside the movable drum 211 can only rotate in a single direction inside the movable drum 211, the rotation in the opposite direction is limited by the limiting block on the inner wall of the movable drum 211, the fixed drum 215 is rotatably connected at the position of the outer side wall of the first screw 28 corresponding to the movable drum 211, the inner diameter of the fixed drum 215 is larger than the outer diameter of the first screw 28, so that the rotation of the fixed drum 215 is not influenced by the first screw 28, and is rotated only under the support of the first support plate 214 by the drive of the movable drum 211, the inner side wall of the linkage cavity 210 is connected with a first supporting plate 214 at a position corresponding to the fixed rotary drum 215, one ends of the movable rotary drum 211 and the fixed rotary drum 215 corresponding to each other are provided with skewed tooth-shaped structures, the skewed teeth of the two are opposite in inclination direction, so that the movable rotary drum 211 and the fixed rotary drum 215 can be driven to rotate by mutual embedding of the skewed teeth at the corresponding ends, and can be slowly slid in by the skewed teeth to be in butt joint embedding when in contact;

the outer side wall of the containing box 23 is provided with a sliding hole corresponding to the position of the rubber band 21, the size of the sliding hole is the same as the size of the cross section of the rubber band 21, one side of the outer side wall of the dialysis tube bifurcation block 1, which is far away from the containing box 23, is connected with a connecting cavity 22, one end of the rubber band 21, which corresponds to the connecting cavity 22, is connected with a connecting piece, the size of the connecting piece is larger than that of a sliding block, so that the rubber band 21 can be fixed in position after surrounding and fixing the position of a limb through the butt joint of the connecting piece at one end and the connecting cavity 22 after being pulled out;

in the prior art, most of fixing equipment of hemodialysis catheters is designed according to fixed positions, so that the hemodialysis catheters can only be fixed at corresponding positions, the placement positions of the hemodialysis catheters can be selected at three positions, namely internal jugular veins, femoral veins and subclavian veins, according to actual conditions, and the hemodialysis catheter fixing equipment which is designed specifically for a certain position is difficult to fix the corresponding position according to actual requirements, so that inconvenience is brought to medical staff;

when the hemodialysis catheter is fixed in position, the rubber band belt 21 can be pulled out from the storage box 23 through a connecting piece at one end of the rubber band belt 21, and is inserted into the inner side of the connecting cavity 22 at one side of the dialysis catheter branching block 1 after being wound for a circle at a corresponding installation position, the supporting shaft 213 is driven to rotate to enable the spiral spring 24 to contract in the pulling-out process of the rubber band belt 21, when medical personnel loosen the traction on the pulled-out rubber band belt 21, the rubber band belt 21 is mostly and partially retracted into the storage box 23 under the action of the reset action force of the spiral spring 24, the position of the hook 218 can be adjusted through the traction rope 212 before the rubber band belt 21 is pulled, the rotation of the supporting shaft 213 is not limited by the interaction between the ratchet wheel 217 and the hook 218, the transmission belt 216 is loosened through the contraction of the height of the hydraulic push rod, so that the transmission belt 216 does not influence the mutual driving rotation between the supporting shaft 213 and the first screw 28, after the rubber band 21 is attached to the body surface of a patient, the traction rope 212 is loosened to reset the hook 218, the hydraulic push rod is adjusted to tighten the transmission belt 216, the support frame 27 can be pressed to slide towards the inside of the containing box 23, under the condition that the support frame 27 is limited to be difficult to rotate, the sliding part in the support frame 27 and the groove on the first screw 28 drive the first screw 28 to rotate under the interaction, the first screw 28 rotates to drive the movable rotary drum 211 and the first screw 28 to rotate through the interaction between the inner sliding part and the first screw 28, the movable rotary drum moves towards the fixed rotary drum 215 along the first screw 28 while rotating, the inner rotary drum is limited to rotate synchronously along with the movable rotary drum 211 in the rotation process of the movable rotary drum 211, the fixed rotary drum 215 drives the fixed rotary drum 215 to rotate under the support of the first support plate 214 after being abutted with the fixed rotary drum 215 through the helical tooth structure on the corresponding end, the fixed rotary drum 215 drives the support shaft 213 to rotate through the tightened transmission belt 216, the support shaft 213 continues to rotate to wind the rubber band 21, so that the rubber band 21 is more tightly attached to the body surface of a patient, the hook 218 slides on the surface of the ratchet wheel 217 under the support of the rotating seat 219 in the rotation process of the support shaft 213, and the reverse rotation of the ratchet wheel 217 is limited to pull out the rubber band 21, the support frame 27 drives the first screw 28 to rotate in the reverse direction when sliding out of the accommodating box 23 under the action of the first spring 26, the movable drum 211 moves in the direction away from the fixed drum 215 along the first screw 28 while rotating through the interaction between the inner sliding part and the first screw 28, and is blocked when moving to the position of the second baffle 29, the drum inside the movable drum 211 rotates inside the movable drum 211, so that the blocked position of the movable drum 211 does not affect the rotation of the first screw 28, and medical staff can drive the support shaft 213 to further tighten the rubber band 21 by pressing the support shaft 27 for multiple times, make hemodialysis pipe can fix and carry out the fixed of position through tightening up of rubber band 21 behind a plurality of positions departments, application scope is more extensive, can not cause the puzzlement for medical personnel because of fixed position is single.

Example 2:

referring to fig. 6-7, the front surface of the storage box 23 is provided with a protection mechanism 4, the protection mechanism 4 includes a second support plate 42, four corner positions of the outer side wall of the second support plate 42 are connected with limit rods 43, the four limit rods 43 limit the movement of a movable plate 47, so that the movable plate 47 is always kept horizontal with the second support plate 42 during the position movement process, a second screw 44 is rotatably connected to the middle position of the second support plate 42, the outer side wall of the second screw 44 is slidably connected with the movable plate 47, the movable plate 47 slides on the second screw 44 through an inner sliding member, one end of the second screw 44 close to the linkage cavity 210 is connected with a second gear 45, a first gear 46 is connected to the front surface of the linkage cavity 210 corresponding to the position of the first screw 28 through a connecting shaft, the first gear 46 is connected with the first screw 28 and rotates forward and backward along with the forward and backward rotation of the first screw 28, the second screw rod 44 is driven to rotate positively and negatively by mutual embedding with the second gear 45, so that the movable plate 47 reciprocates on the second screw rod 44, one side of the outer side wall of the movable plate 47, which is close to the second screw rod 44, is connected with a first flexible hose 48, the outer side wall of the second support plate 42, which corresponds to the first flexible hose 48, is connected with a first connecting pipe 411, so that the first flexible hose 48 can absorb outside air when extending and retracting and transmit the air into a cavity inside the flexible sleeve 41 through the first connecting pipe 411, so that the flexible sleeve 41 extends, the front surface of the dialysis tube bifurcation block 1, which corresponds to the static and dynamic vessel 3, is connected with the flexible sleeve 41, the cavity inside the flexible sleeve 41 is provided with a cavity, the inner wall of the cavity is connected with a sealing gasket, the middle position of the lower surface inside the cavity is connected with a plurality of third springs 410 which are uniformly distributed, one side of the upper surface of the flexible sleeve 41 is connected with an exhaust valve 49, the telescopic tube 41 pushes the telescopic tube 41 to extend through the introduction of internal air, so as to protect static and dynamic vessels;

the positions of the two second supporting plates 42 corresponding to the second telescopic hose 51 and the first telescopic hose 48 are both connected with a one-way valve, the positions of the outer side walls of the second telescopic hose 51 and the first telescopic hose 48 corresponding to the limiting rod 43 are connected with a connecting ring, the inner diameter of the connecting ring is larger than the outer diameter of the limiting rod 43, the second telescopic hose 51 and the first telescopic hose 48 can only suck air from the external environment at one end of the telescopic hose and can only discharge internal air from the other end of the telescopic hose due to the arrangement of the one-way valve, and the second telescopic hose 51 and the first telescopic hose 48 can both slide on the limiting rod 43 through the connecting ring to limit the positions in the moving process;

in the prior art, after the hemodialysis catheter is connected to the body surface of a patient, the hemodialysis catheter is easily extruded and deformed due to the physical movement of the patient, the space in which the flow of substances can be carried out is reduced, the flow rate of dialysate for hemodialysis operation is adversely affected, and the hemodialysis catheter is exposed in the external environment and is easily damaged and broken due to the negligence of the patient, so that external dirt is easily introduced into the body of the patient from the broken position of the hemodialysis catheter, and the body health of the patient is affected;

when the supporting frame 27 is pressed to drive the first screw 28 to rotate, the first gear 46 connected to the first screw 28 through a rotating shaft is driven to rotate, the second gear 45 is driven to rotate through mutual perpendicular and mutual embedding with the first gear 46, the second screw 44 rotates along with the second gear 45, and when the first screw 28 rotates in forward and reverse directions, the movable plate 47 reciprocates on the outer side wall of the second screw 44 to extrude and stretch the second flexible hose 51, the second flexible hose 51 guides air sucked from the outside into a cavity inside the flexible sleeve 41 along the first connecting pipe 411, the inside of the cavity is supplemented with air to form an air pressure difference with the outside environment, the sleeve of the flexible sleeve 41 moves outwards under the action of the air pressure difference, the rotation of the first screw 28 can select to adjust the length of the hydraulic push rod according to the situation, so that the transmission belt 216 is loosened or tightened, make telescopic tube 41's length adjustment not influence the rotation of back shaft 213, telescopic tube 41 length extension protects the hemodialysis pipe, makes the hemodialysis pipe can not receive the effect of external effort and leads to the hemodialysis pipe to take place the deformation and the ruptured condition, can not influence the circulation speed of dislysate in the hemodialysis pipe, and can not get into the internal patient of patient and cause the discomfort because of external filth.

Example 3:

referring to fig. 8-10, the outer side wall of the second support plate 42 is provided with the sweat-proof mechanism 5, the sweat-proof mechanism 5 includes a second connection pipe 54, a second flexible hose 51 is connected to a position of the outer side wall of the second support plate 42 corresponding to the second connection pipe 54, another end of the second flexible hose 51 is connected to the movable plate 47, and can contract and stretch along with the reciprocating motion of the movable plate 47 on the second screw 44, so that the second flexible hose 51 can transmit the outside air to the inside of the connection pipe 55 through the second connection pipe 54 when extending and retracting, and flow from the inside of the connection pipe 55 to the inside of each air bag 52, one side of the outer side wall of the rubber band 21 is connected with a plurality of evenly distributed air bags 52, the other side of the outer side wall of the rubber band 21 is connected with the connection pipe 55 corresponding to the position of the air bag 52, the connection pipe 55 is connected with each air bag 52, so that the air flowing from the position of the connection pipe 55 can be filled into the air bags 52, one side of the outer side wall of the communicating pipe 55 is connected with a vent valve 53, the vent valve 53 can control the air entering and discharging from the position of the communicating pipe 55, the other side of the outer side wall of the rubber band 21 is connected with a first chute 56 corresponding to the middle position of the two air bags 52, the inner side wall of the first chute 56 is connected with a first slide block 57 in a sliding way, the first slide block 57 can slide in the position of the inner side of the first chute 56, the middle position of the first slide block 57 is connected with a pipe clamp, the communicating pipe 55 can be clamped to prevent the air flow inside the communicating pipe 55 from flowing, a second sliding groove is formed above two sides of the inner side wall of the first sliding groove 56, a second sliding block is integrally formed at a position, corresponding to the second sliding groove, above two sides of the outer side wall of the first sliding block 57, and the second sliding block slides inside the second sliding groove, so that the first sliding block 57 cannot be separated from the first sliding groove 56 in the sliding process of the first sliding block 57 inside the first sliding groove 56;

in the prior art, in order to ensure that the friction between the fixing equipment for fixing the position of the hemodialysis catheter and the surface of the body of a patient is large and the position cannot move due to sliding, the contact surface between the connecting belt of the fixing equipment and the surface of the body of the patient is large, the air circulation of the covered area of the connecting belt is not smooth under the condition of high temperature of the external environment, and the heat generated by the fixing equipment is difficult to dissipate due to the covering of the connecting belt, so that discomfort is easily caused to the patient;

after the rubber band 21 for fixing the hemodialysis catheter is tightly attached to the skin of a patient, a medical worker can slide the position of the first sliding block 57 in the first sliding groove 56 close to the position of the containing box 23, so that the tube clamp on the first sliding block 57 clamps the communicating tube 55 at the position, the air circulating in the communicating tube 55 is difficult to enter the communicating tube 55 positioned in the containing box 23, the second connecting tube 54 can be butted with the communicating tube 55, the outside air sucked in the stretching process of the second flexible hose 51 can be transmitted into the communicating tube 55 through the second connecting tube 54, one end of the communicating tube 55 is blocked by the tube clamp, the air flowing in the communicating tube 55 is filled into the air bag 52, the air bag 52 is expanded, the gap between the rubber band 21 and the skin of the patient is increased, the air circulation and heat dissipation are facilitated, and discomfort is not caused to the patient when the outside environment temperature is higher, and the bulging of the air bag 52 does not affect the position fixing of the elastic band 21.

When the invention is used, a medical staff can pull out the rubber band 21 from the interior of the containing box 23 through the connecting piece at one end of the rubber band 21, the flat spiral spring 24 is compressed and contracted in the pulling-out process, then the rubber band 21 surrounds the dialysis tube bifurcation block 1 to be installed and fixed for a circle, the connecting piece at one end of the rubber band 21 is butted with the connecting cavity 22, more rubber bands 21 pulled out after butting are contracted to the interior of the containing box 23 under the action of the rebounding force of the flat spiral spring 24 and are wound by the supporting shaft 213, the position of the hook 218 can be adjusted through the traction rope 212 before the rubber band 21 is pulled, the rotation of the supporting shaft 213 is not limited by the interaction between the ratchet wheel 217 and the hook 218, the transmission belt 216 is loosened through the contraction of the height of the hydraulic push rod, the transmission belt 216 can not influence the mutual driving rotation between the supporting shaft 213 and the first screw 28, the medical staff can press the supporting frame 27 to slide on the surface of the interlocking cavity 210, one end of the supporting frame 27 slides to the inner side of the interlocking cavity 210 on the first screw 28, during the sliding process, the first spring 26 is stretched, the sliding part at the inner side of the supporting frame 27 and the first screw 28 interact to drive the first screw 28 to rotate in the sliding process of the supporting frame 27, the supporting frame 27 drives the first screw 28 to rotate in the reverse direction during the rebounding process of the first spring 26, during the forward rotation, the inner drum of the movable drum 211 is limited to enable the movable drum 211 and the inner drum to integrally rotate along with the first screw 28, and slide to the position of the fixed drum 215 through the mutual friction between the first screw 28, after being mutually embedded with one end of the fixed drum 215, the fixed drum 215 drives the supporting shaft 213 to rotate through the transmission belt 216, so that the supporting shaft 213 further winds up the rubber band 21, and the rubber band 21 is attached to the body surface of the child more tightly, the pulling rope 212 is loosened, the hook 218 is reset under the action of the second spring 220 to limit the ratchet wheel 217, the ratchet wheel 217 integrally formed with the supporting shaft 213 is limited by the hook 218 to limit the rotation of the supporting shaft 213, the movable drum 211 moves in the direction away from the fixed drum 215 along the first screw 28 while rotating through the interaction between the inner sliding piece and the first screw 28, and is blocked when moving to the position of the second baffle 29, the drum inside the movable drum 211 rotates inside the movable drum 211 to prevent the position of the movable drum 211 from influencing the rotation of the first screw 28, the telescopic sleeve 41 connected to the front surface of the dialysis tube furcation block 1 at the position corresponding to the static and movable vascular 3 is communicated with the first telescopic hose 48 at one side of the second supporting plate 42 through the first connecting pipe 411, the first gear 46 is connected with the first screw 28 through the rotating shaft and rotates along with the first screw 28, the first gear 46 drives the second gear 45 which is perpendicular to and embedded with the first gear 46 to rotate in the rotation process, when the second gear 45 connected to the second screw 44 rotates, the movable plate 47 connected to the outer side wall of the second screw 44 through the sliding part slides in position, and in the forward and reverse rotation process of the first gear 46, the movable plate 47 reciprocates on the outer side wall of the second screw 44, so that the first flexible hose 48 transfers the outside air to the cavity inside the flexible sleeve 41 along the first connecting pipe 411 in the contraction and extension process, the supplement of the gas obtained inside the cavity forms a pressure difference with the outside environment, the sleeve of the flexible sleeve 41 moves outwards under the action of the pressure difference, the flexible sleeve 41 extends to protect the static and dynamic pulse tube 3, in the extension process of the flexible sleeve 41, the third spring 410 connected inside the flexible sleeve 41 extends, after the vent valve 49 at the upper end of the telescopic tube 41 is opened, the air inside the telescopic tube 41 is exhausted, the telescopic tube 41 retracts and resets under the action of the third spring 410, the medical care personnel can slide the first slider 57 at the position corresponding to the storage box 23 on the pulled-out rubber band 21 at the inner side of the first chute 56, so that the first slider 57 is clamped on the outer side wall of the communication tube 55, the movable plate 47 drives the second telescopic hose 51 to contract and stretch in the reciprocating process, the second telescopic hose 51 transmits the outside air to the inside of the communication tube 55 along the second connecting tube 54, the air is filled into the corresponding air bag 52 from the position of the communication tube 55, so that the air bag 52 is inflated, one end of the communication tube 55 is blocked by the clamping of the first slider 57, the air cannot be transmitted to the inner side of the storage box 23 along the communication tube 55, the air bag 52 is inflated to support the rubber band 21, and a gap exists between the surface of the body of the child, and then closes the vent valve 53 at one end of the communication pipe 55.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (8)

1. A children hemodialysis catheter fixing device comprises a dialysis catheter bifurcation block (1) and a static and dynamic vessel (3), wherein the static and dynamic vessel (3) is connected to two sides of the front surface of the dialysis catheter bifurcation block (1), and is characterized in that a connecting mechanism (2) is arranged on one side of the outer side wall of the dialysis catheter bifurcation block (1);

the connecting mechanism (2) comprises a containing box (23), one side of the outer side wall of the containing box (23) is connected with a rubber band (21), the middle position of the inner rear surface of the containing box (23) is rotatably connected with a supporting shaft (213), one side of the outer side wall of the containing box (23) is integrally formed with a linkage cavity (210), the position of the inner front surface of the containing box (23) corresponding to the supporting shaft (213) is connected with a flat spiral spring (24), the position of the outer side wall of the supporting shaft (213) close to the flat spiral spring (24) is connected with a first baffle (25), the position of the inner rear surface of the containing box (23) corresponding to the supporting shaft (213) is connected with a ratchet wheel (217), the rear part of the outer side wall of the supporting shaft (213) close to the ratchet wheel (217) is connected with a driving belt (216), the position of the inner side wall of the containing box (23) corresponding to the ratchet wheel (217) is rotatably connected with a hook (218) through a rotating seat (219), a traction rope (212) is connected above the outer side wall of the hook (218), and a second spring (220) is connected to the inner side wall of the containing box (23) at a position corresponding to the traction rope (212);

a first screw rod (28) is rotatably connected at the middle position of the rear surface in the linkage cavity (210), a supporting frame (27) is connected to the front surface of the linkage cavity (210) in a sliding way at the position corresponding to the first screw rod (28), the two sides of the front surface inside the linkage cavity (210) are provided with first springs (26) at the positions corresponding to the supporting frame (27), a second baffle (29) is connected to the inner side wall of the linkage cavity (210) at a position corresponding to the first screw rod (28), a movable rotary drum (211) is connected to one side of the outer side wall of the first screw (28) close to the second baffle (29) in a sliding way, a fixed rotary drum (215) is rotatably connected to the outer side wall of the first screw (28) at a position corresponding to the movable rotary drum (211), the inner side wall of the linkage cavity (210) is connected with a first supporting plate (214) at a position corresponding to the fixed rotary drum (215).

2. The children's hemodialysis catheter fixing device according to claim 1, wherein a protection mechanism (4) is provided on the front surface of the receiving box (23);

protection machanism (4) include second backup pad (42), four corner positions of second backup pad (42) lateral wall department is connected with gag lever post (43), second backup pad (42) intermediate position department rotates and is connected with second screw rod (44), second screw rod (44) lateral wall sliding connection has fly leaf (47), second screw rod (44) are close to interlock chamber (210) one end is connected with second gear (45), interlock chamber (210) front surface corresponds first screw rod (28) position department is connected with first gear (46) through the connecting axle, fly leaf (47) lateral wall is close to one side of second screw rod (44) is connected with first flexible hose (48), second backup pad (42) lateral wall corresponds first flexible hose (48) position department is connected with first connecting pipe (411), dialysis pipe branching block (1) front surface corresponds still move pulse pipe (3) position department is connected with the flexible pipe (48) (41).

3. A children's hemodialysis catheter fixing device according to claim 2, wherein the outer side wall of the second supporting plate (42) is provided with a sweat-proof mechanism (5);

sweat-proof mechanism (5) include second connecting pipe (54), second backup pad (42) lateral wall corresponds second connecting pipe (54) position department is connected with second expansion hose (51), rubber band area (21) lateral wall one side is connected with a plurality of evenly distributed's gasbag (52), rubber band area (21) lateral wall opposite side corresponds gasbag (52) position department is connected with communicating pipe (55), communicating pipe (55) lateral wall one side is connected with breather valve (53), rubber band area (21) lateral wall opposite side corresponds two gasbag (52) intermediate position department is connected with first spout (56), first spout (56) inside wall sliding connection has first slider (57).

4. The children hemodialysis catheter fixing device according to claim 1, wherein a sliding hole is formed in the outer side wall of the containing box (23) at a position corresponding to the rubber band (21), the size of the sliding hole is the same as the size of the cross section of the rubber band (21), a connecting cavity (22) is connected to one side, away from the containing box (23), of the outer side wall of the dialysis catheter branching block (1), a connecting piece is connected to one end, corresponding to the connecting cavity (22), of the rubber band (21), and the size of the connecting piece is larger than that of the sliding block.

5. The children hemodialysis catheter fixing device according to claim 2, wherein a cavity is formed in the telescopic tube (41), a sealing gasket is connected to the inner wall of the cavity, a plurality of third springs (410) are uniformly distributed and connected to the middle position of the lower surface of the inner part of the cavity, and an exhaust valve (49) is connected to one side of the upper surface of the telescopic tube (41).

6. The children hemodialysis catheter fixing device according to claim 3, wherein a second sliding groove is formed above two sides of the inner side wall of the first sliding groove (56), and a second sliding block is integrally formed above two sides of the outer side wall of the first sliding block (57) at a position corresponding to the second sliding groove.

7. The children hemodialysis catheter fixing device according to claim 2, wherein a one-way valve is connected to each of the two second support plates (42) at positions corresponding to the second flexible hose (51) and the first flexible hose (48), a connecting ring is connected to one side of the outer side wall of each of the second flexible hose (51) and the first flexible hose (48) at positions corresponding to the limiting rod (43), and the inner diameter of the connecting ring is larger than the outer diameter of the limiting rod (43).

8. The children's hemodialysis catheter fixing device of claim 1, wherein the method of using the children's hemodialysis catheter fixing device comprises the steps of:

the method comprises the following steps: when a medical staff carries out hemodialysis operation on children, after a traction rope (212) is dragged to the outer side of a containing box (23), the rubber band (21) can be pulled out from the containing box (23) through a connecting piece at one end of the rubber band (21), a plane scroll spring (24) is compressed in the pulling process, after the rubber band (21) is installed at a fixed position for a circle around a dialysis tube branching block (1), the connecting piece at one end of the rubber band (21) is butted with a connecting cavity (22), more rubber bands (21) pulled out after being butted are contracted to the inner part of the containing box (23) under the action of the resilience force of the plane scroll spring (24) and are rolled by a supporting shaft (213), and the medical staff can press the supporting frame (27) to slide on the surface of a linkage cavity (210) in position, so that one end of the supporting frame (27) slides to the inner side of the linkage cavity (210) on a first screw (28), in the sliding process, the first spring (26) is stretched, the sliding piece on the inner side of the supporting frame (27) and the first screw rod (28) interact to enable the supporting frame (27) to drive the first screw rod (28) to rotate in the forward direction in the sliding process, the supporting frame (27) drives the first screw rod (28) to rotate in the reverse direction in the rebounding process of the first spring (26), when the supporting frame rotates in the forward direction, the movable drum (211) rotates along with the first screw rod (28) and slides to the position of the fixed drum (215) through mutual friction between the movable drum and the first screw rod (28), the fixed drum (215) is driven to rotate after being mutually embedded with one end of the fixed drum (215), the fixed drum (215) drives the supporting shaft (213) to rotate through the driving belt (216), the supporting shaft (213) further winds the rubber band (21) to enable the rubber band (21) to be attached to the body surface of a child more tightly, the traction rope (212) is loosened, the hook (218) is reset under the action of the second spring (220) to limit the ratchet wheel (217), and the ratchet wheel (217) which is integrally formed with the support shaft (213) is limited by the hook (218) to limit the rotation of the support shaft (213);

step two: the front surface of the dialysis tube bifurcation block (1) is communicated with a telescopic sleeve (41) connected with a position corresponding to a static and dynamic vessel (3) through a first connecting tube (411) and a first telescopic hose (48) on one side of a second supporting plate (42), a first gear (46) is connected with a first screw rod (28) through a rotating shaft and rotates along with the first connecting tube, a second gear (45) which is perpendicular to and embedded with the first gear (46) is driven to rotate in the rotating process of the first gear (46), a movable plate (47) connected to the outer side wall of the second screw rod (44) through a sliding piece slides in position when the second gear (45) connected to the second screw rod (44) rotates, the movable plate (47) reciprocates on the outer side wall of the second screw rod (44) in the forward and reverse rotating process of the first gear (46), and external air is transferred to a cavity in the telescopic sleeve (41) along the first connecting tube (411) in the contraction and stretching process of the first telescopic hose (48) The sleeve inside the cavity slides outwards under the action of air pressure, the telescopic sleeve (41) extends to protect the static and dynamic pulse tube (3), and a third spring (410) connected inside the telescopic sleeve (41) stretches in the extension process of the telescopic sleeve (41);

step three: the medical staff can slide the first sliding block (57) on the pulled-out rubber band (21) corresponding to the position of the containing box (23) at the inner side of the first sliding groove (56) to ensure that the first sliding block (57) is clamped on the outer side wall of the communicating pipe (55), the movable plate (47) drives the second flexible hose (51) to contract and stretch in the reciprocating process, so that the second flexible hose (51) transmits the outside air to the inside of the communicating pipe (55) along the second connecting pipe (54), and the air bag (52) is inflated by filling the air bag (52) from the position of the communicating pipe (55) into the corresponding air bag (52), and one end of the communication pipe (55) is blocked by the first slider (57) so as not to transmit air to the inner side of the storage box (23) along the communication pipe (55), the air bag (52) expands to support the rubber band (21) and form a gap with the body surface of the child, and then the vent valve (53) at one end of the communication pipe (55) is closed.

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