CN209611952U - Adjustable-angle microtubular - Google Patents

Abstract

The utility model relates to medical instruments fields, more particularly to adjustable-angle microtubular, including tube head and pipe shaft, circular hole is offered in tube head, the inside of tube head is fixedly connected with fixing piece, first through hole and the second through-hole are offered on fixing piece, fixing piece is equipped with sliding slot far from one end of pipe shaft, sliding slot is located at the opening of the second through-hole, control piece is slidably connected in sliding slot, control piece includes iron block and electromagnetic block, pipe shaft includes outer pipe shaft and interior pipe shaft, outer pipe shaft and interior pipe shaft include preceding inlet side and tail end, cavity is formed between outer pipe shaft and interior pipe shaft, drawstring is equipped in cavity, drawstring includes arc end and control terminal, arc end is fixedly connected with the preceding inlet side of interior pipe shaft, control terminal is slidably connected with tube head, the outer surface of control terminal is equipped with external screw thread iron block and electromagnetic block for controlling elongating or shortening for drawstring；The main purpose of the utility model is that solving direction and the angle that can flexibly and accurately adjust microtubular during operative treatment.

Description

Adjustable angle microcatheter

technical field

The utility model relates to the field of medical equipment, in particular to a micro-catheter with an adjustable angle.

Background technique

In recent years, with the development of medical technology, interventional therapy has been widely used in clinical treatment. In order to improve the success rate of surgery, microcatheters and guide wires are usually used together. During surgical treatment, microcatheters can The guide wire provides support to facilitate the guide wire to pass through the blood vessel, and the guide wire guides the microcatheter to help the microcatheter enter the blood vessel. The use of microcatheter therapy technology is not only convenient to operate, but also has less risk of treatment, and the trauma of interventional therapy is low, which can greatly reduce the pain of patients, and the cost of treatment is relatively low.

However, according to the statistics of existing interventional treatment cases, it is found that bifurcated lesions are more common, and the advancing end of the traditional microcatheter cannot change the direction and angle, although the advancing end of the existing microcatheter can be changed through the guidance of the guide wire. direction and angle, but the microcatheter changes passively with the direction and angle of the guide wire. When it needs to enter into a bifurcated blood vessel, the microcatheter may need to be guided multiple times by the guide wire to successfully enter the bifurcated blood vessel. In the blood vessels, the flexibility and convenience of the microcatheter are reduced, especially when encountering complicated cases or sudden situations, it brings a lot of troubles to clinical medical workers when using the microcatheter.

Utility model content

The main purpose of the utility model is to provide an angle-adjustable microcatheter to solve the problem of flexibly adjusting the direction and angle of the microcatheter when bifurcated blood vessels are encountered during surgical treatment.

In order to achieve the above object, the basic technical solutions of the utility model are as follows:

Angle-adjustable microcatheter, including a hollow tube head and a tube body fixedly connected to the tube head, the tube head is provided with a round hole, the axis of the round hole coincides with the axis of the tube body, and the inside of the tube head is fixedly connected with The fixing piece is provided with a first through hole, the axis of the first through hole coincides with the axis of the pipe body, and the fixing piece is also provided with second through holes distributed in a circular matrix along the central axis of the first through hole, A chute is provided at the opening of the second through hole away from the pipe body, and a control piece is slidably connected in the chute. The control piece includes a semi-arc electromagnetic block and a semi-arc iron block. Magnetically connected and matched in shape, the concave surfaces of the electromagnetic block and the iron block are provided with internal threads;

The tube body includes an outer tube body and an inner tube body that is installed in the cavity of the outer tube body, the outer tube body and the inner tube body are elastic, the outer tube body and the inner tube body both include a forward end and a tail end, and the inner tube body The outer surface of the advancing end is an arc surface, and a cavity is formed between the outer tube body and the inner tube body, and a drawstring is arranged in the cavity, one end of the drawstring is fixedly connected with the advancing end of the inner tube body, and the other end of the drawstring is located in the tube The inside of the head, and the stay rope is fixedly connected with a connecting rod, the outer surface of the connecting rod is provided with external threads, and the end of the connecting rod away from the stay rope passes through the second through hole and is located outside the pipe head.

The principle of the basic scheme: the guide wire passes through the round hole of the tube head and the first through hole of the fixing part and enters the cavity of the inner tube body, the guide wire reaches the advancing end from the tail end of the inner tube body, and the The guide wire starts to guide the microcatheter, and the tube head is manually pushed, so that the outer tube body and the inner tube body advance together with the guide wire, and finally the microcatheter enters the lesion that needs to be treated. When the guide wire guides the microcatheter to change the direction and angle, the electromagnetic block is powered on, so that the electromagnetic block and the iron block are magnetically connected, and the electromagnetic block and the iron block are closed to form a control part, and the internal thread in the control part meshes with the external thread of the connecting rod , turn the connecting rod clockwise or counterclockwise to make the connecting rod move relative to the tube head, the connecting rod pulls the drawstring, and the drawstring pulls the forward end of the tube body, so that the tube body is deformed to change the direction and angle; when the microcatheter does not need to change In the direction and angle, the electromagnetic block is disconnected from the power supply, the electromagnetic block and the iron block are separated, the connecting rod and the pull rope are reset under the elastic force of the tube body, and the tube body returns to its natural state.

The utility model adopts the above-mentioned basic technical scheme, and compared with the prior art, it has the following technical effects:

The angle-adjustable microcatheter of the utility model, on the one hand, through the structural design of the double-layer pipe body and the control part, the outer surface of the inner pipe body can form an arc surface, so that the pull rope can generate a certain inclination angle in the cavity , when performing treatment, the guide wire is manipulated to pass through the first through hole and enter the cavity of the inner tube body for guidance. When the direction and angle of the microcatheter need to be changed, the electromagnetic block is energized, and the iron block and the electromagnetic block are closed, so that the control part Mesh with the connecting rod, then rotate the connecting rod, control the drawstring through the movement of the connecting rod, so that the drawstring drives the tube body to change the angle and direction, so that when encountering a bifurcated blood vessel, the microcatheter can be quickly and accurately Direction and angle adjustment.

Further, a control sleeve is rotatably connected in the chute, a first extension spring is fixedly connected between the control sleeve and the iron block, and a second extension spring is fixedly connected between the control sleeve and the electromagnetic block.

When the electromagnetic block is powered off, the iron block and the electromagnetic block lose their magnetic attraction to each other. The first extension spring pulls the iron block away from the connecting rod, and the second extension spring also pulls the electromagnet away from the connecting rod, so that the iron block and the electromagnetic block Can be reset quickly.

Further, the outer surface of the inner tube body is fixedly connected with a flange in the circumferential direction, and the diameter of the outer tube body decreases sequentially from the tail end to the forward end.

When the connecting rod is pulling the pulling rope, the flange can better support the pulling rope, reduce the friction between the pulling rope and the outer surface of the inner tube body, and at the same time, when it is necessary to enter into a small blood vessel for treatment, the In the case of the diameter of the inner tube body, the diameter of the outer tube body gradually decreases from the tail end to the forward end, so that the microcatheter can be smoothly entered into the smaller blood vessel, so that the dose of the drug injected is not changed, and the effect on the treatment of the patient is improved. be improved.

Further, a third extension spring is fixedly connected between the pull cord and the connecting rod.

A third extension spring is arranged in the stay cord, and when the stay cord is pulled or unclamped, the expansion and contraction of the third extension spring can buffer the pulling force on the stay cord to prevent the stay cord from being torn off.

Further, there are at least two pull cords.

Multiple drawstrings are arranged in the cavity, which improves the precision of adjusting the angle and direction of the microcatheter.

Further, the outer surface of the advancing end of the outer tube body is an arc-shaped smooth surface.

The curved outer surface can reduce friction and avoid damage to the patient's blood vessels during medical procedures.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the adjustable angle microcatheter of the utility model;

Fig. 2 is the left view of the tube body in the adjustable angle microcatheter of the present invention;

Fig. 3 is the right view of the fixing part in the adjustable angle microcatheter of the utility model;

Fig. 4 is the partially enlarged schematic diagram of place A in Fig. 1;

FIG. 5 is a partially enlarged schematic diagram of the location B in FIG. 1 .

Detailed ways

The following is further described in detail through specific implementation methods:

The reference signs in the drawings of the specification include: outer pipe body 1, inner pipe body 2, pipe head 3, pull cord 4, connecting rod 401, fixing piece 5, chute 6, iron block 7, electromagnetic block 8, arc surface 9. The first through hole 10, the second through hole 11, the first tension spring 12, the second tension spring 13, the flange 14, the third tension spring 15, and the control sleeve 16.

As shown in Fig. 1, Fig. 2 and Fig. 3, the adjustable angle microcatheter comprises a circular pipe head 3 at the right end and a pipe body at the left end, the inside of the pipe head 3 is hollow, and the pipe head 3 is fixedly connected with the pipe body, and the pipe head 3 is fixedly connected with the pipe body. Both the right end and the left end of the head 3 are provided with circular holes, the diameter of which is equal to the diameter of the tube body cavity, the inside of the tube head 3 is fixedly connected with a circular fixing part 5, and the middle part of the fixing part 5 has a first through hole 10. Ten second through holes 11 forming a circular matrix along the central axis of the first through hole 10 are also provided on the fixing member 5, and the axes of the first through holes 10 and the axis of the pipe body are located on the same straight line, as shown in As shown in Figure 5, the right end of the fixing member 5 is provided with ten chute 6, and each chute 6 is correspondingly located at the opening of each second through hole 11, and the chute 6 is rotationally connected with a circular control Cover 16, the semi-arc-shaped iron block 7 and the semi-arc-shaped electromagnetic block 8 are installed in the control sleeve 16, the concave surfaces of the iron block 7 and the electromagnetic block 8 all have internal threads, and the middle part of the iron block 7 and the electromagnetic block 8 are closed to form Sliding hole, the first extension spring 12 is fixedly connected between the control sleeve 16 and the iron block 7, the second extension spring 13 is fixedly connected between the control sleeve 16 and the electromagnetic block 8, the first extension spring 12 and the second extension spring 13 Make the iron block 7 and the electromagnet 8 reset quickly when the power is cut off; The inner tube body 2 is made of rubber, and the diameter of the outer tube body 1 decreases gradually from the right end to the left end. The diameter of the tube body 1 gradually decreases from the tail end to the forward end, so that the microcatheter can be smoothly entered into smaller blood vessels, so that the dose of the drug input is not changed, so that the treatment effect on patients can be improved. The outer tube body 1 The outer surface of the left end is an arc-shaped smooth surface, so as to avoid the patient's blood vessels from being damaged during the medical treatment; Two circles of flanges 14 are fixedly connected to the surface circumferential direction, and the outer surface of the inner tube body 2 advancing end is an arc surface 9, and a cavity is formed between the inner tube body 2 and the outer tube body 1, and ten stay ropes 4 are arranged in the cavity. The left end of stay cord 4 is fixedly connected with the forward end of inner tube body 2, and the right end of each stay cord 4 passes through the round hole on the left side of pipe head 3 and is connected with a third extension spring 15, which is used to buffer the tension of stay cord 4. To prevent the pull cord 4 from being torn off, the right end of the third extension spring 15 is connected with a connecting rod 401, the outer surface of the connecting rod 401 is provided with an external thread matched with the control member, and the right end of the connecting rod 401 passes through the second connecting rod 401. Stretch out the pipe head 3 behind the circular hole on the right side of the two through holes 11 and the pipe head 3 .

The specific implementation process is as follows: first, the guide wire is passed through the round hole and the first through hole 10 into the cavity of the inner tube body 2, so that the guide wire reaches the advancing end from the tail end of the inner tube body 2, and the guide wire in the cavity The wire begins to guide the microcatheter, and the tube head 3 is manually pushed, so that the outer tube body 1 and the inner tube body 2 advance together with the guide wire, and finally the microcatheter enters the lesion that needs to be treated. When the angle of the blood vessel needs to be changed, the electromagnetic block 8 that needs to be changed in direction on the fixing member 5 is powered on, and the electromagnetic block 8 and the iron block 7 are magnetically connected in the chute 6 and form a hole with an internal thread, and the internal thread and the external connection rod 401 Engage the threads, turn the connecting rod 401 clockwise, so that the connecting rod 401 moves outward from the pipe head 3, the pull rope 4 is tightened, and the left end of the pull rope 4 generates an oblique upward pulling force, and the pull rope 4 pulls the inner pipe body 2 and the outer pipe The body 1 is deformed, so as to quickly and accurately adjust the direction and angle of the microcatheter, and gradually move the tube body with the angle direction of the guide wire to reach the place where the lesion needs to be treated; when the microcatheter does not need to change the direction and angle, the electromagnetic block 8 is powered off, and the iron block 7 and the electromagnetic block 8 are respectively subjected to the pulling force of the first extension spring 12 and the second extension spring 13, so that the iron block 7 is separated from the electromagnetic block 8, and the stay cord 4 returns to the natural pull stretched state, the microcatheter returns to its natural form.

What is described above is only the embodiment of the utility model, and the specific technical solutions and/or characteristics and other general knowledge known in the solutions are not described here too much. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, some modifications and improvements can also be made, and these should also be regarded as the protection scope of the utility model, and these will not affect the utility model. Effects of utility model implementation and practicability of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (6)

1. adjustable-angle microtubular, what it is including inner hollow tube head (3) with the pipe shaft that is fixedly connected with tube head (3), feature exists In: the tube head (3) offers circular hole, and the axis of circular hole is overlapped with the axis of pipe shaft, and the inside of the tube head (3) is fixedly connected Having fixing piece (5), is offered on fixing piece (5) first through hole (10), the axis of first through hole (10) is overlapped with the axis of pipe shaft, The second through-hole (11) along the rounded matrix distribution in first through hole (10) central axes is additionally provided on the fixing piece (5), second is logical Hole (11) is equipped with sliding slot (6) far from the opening of pipe shaft, and control piece is slidably connected in sliding slot (6), and control piece includes half arc Electromagnetic block (8) and half arc iron block (7), matched after the electromagnetic block (8) is powered with iron block (7) magnetic connection and shape, The concave surface of the electromagnetic block (8) and iron block (7) is equipped with internal screw thread；

The pipe shaft includes outer pipe shaft (1) and the interior pipe shaft (2) for being threaded through outer pipe shaft cavity, and outer pipe shaft (1) and interior pipe shaft (2) are equal Flexible, outer pipe shaft (1) and interior pipe shaft (2) include preceding inlet side and tail end, and the outer surface of the preceding inlet side of interior pipe shaft (2) is cambered surface, Cavity is formed between outer pipe shaft (1) and interior pipe shaft (2), is equipped with drawstring (4) in cavity, one end and interior pipe shaft (2) of drawstring (4) Preceding inlet side is fixedly connected, and the other end of drawstring (4) is located at the inside of tube head (3), and drawstring (4) is fixedly connected with connecting rod (401), The external screw thread that the outer surface of connecting rod (401) matches equipped with the internal screw thread with control piece, the one of connecting rod (401) separate drawstring (4) End is across the second through-hole (11) and is located at tube head (3) outside.

2. adjustable-angle microtubular according to claim 1, it is characterised in that: be rotatably connected in the sliding slot (6) Control set (16) is fixedly connected with the first tension spring (12) between control set (16) and iron block (7), control set (16) and electromagnetic block (8) the second tension spring (13) are fixedly connected between.

3. adjustable-angle microtubular according to claim 1, it is characterised in that: the outer surface week of said inner tube body (2) To being fixedly connected with flange (14), the diameter of outer pipe shaft (1) is gradually reduced from tail end to preceding inlet side.

4. adjustable-angle microtubular according to claim 1, it is characterised in that: the drawstring (4) and connecting rod (401) it Between be fixedly connected with third tension spring (15).

5. adjustable-angle microtubular according to claim 1, it is characterised in that: the drawstring (4) is at least provided with two.

6. adjustable-angle microtubular as claimed in any of claims 1 to 5, it is characterised in that: the outer pipe shaft (1) outer surface of preceding inlet side is the shiny surface of arc.