CN211188732U - Radiography catheter with fixing device - Google Patents

Abstract

The utility model discloses a radiography catheter with a fixing device, which comprises a catheter tube body, a catheter soft end, a plugging block, a three-way seat, a rotary fixing mechanism, a flow stopping valve and a plugging cap, wherein an inner cavity channel is arranged inside the catheter tube body along the axis of the catheter tube body, and the catheter soft end, the plugging block, the three-way seat and the rotary fixing mechanism are arranged along the axial direction of the catheter tube body from top to bottom; the tee joint seat comprises a front support, a side support and a tail support, the front support is communicated with an inner cavity channel, the side support is communicated with a flow stopping valve, the rotary fixing mechanism comprises a round hole elastic inner core, a hard pressing sheet and a rotary outer joint, the rotary outer joint comprises an inner cone, an inner cavity channel, an inner thread and an outer convex thread, and the inner cavity channel is communicated with the tail support through the hard pressing sheet and the round hole elastic inner core. The utility model discloses both can prevent that the contrast medium from flowing against the current also can guide and fix other medical instrument of interveneeing, the situation that medical instrument dropped appears in preventing the operation takes place.

Description

Radiography catheter with fixing device

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a take fixing device's radiography pipe.

Background

Female infertility patients in China increase year by year, and the prevalence rate is as high as 7% -10%. Fallopian tube problems are the leading factor in the development of infertility, with varying degrees of fallopian tube obstruction accounting for over 33%.

Wherein hysterosalpingography, selective angiography and salpinginterventional recanalization are the main operations for treating salpingemphraxis at the present stage.

In the hystero-salpingography, a contrast medium channel between the outside of a body and the uterus is mainly established by a contrast catheter, and the smoothness of a uterine cavity and a uterine tube is known under X-rays. In selective angiography and recanalization, the angiographic catheter mainly functions as an instrument channel and can be used for interventional fallopian tube instruments such as a microcatheter, a torque control catheter, a guide wire and the like.

The existing hysterosalpingography catheters comprise 3 types of cone heads, single sheath tubes and double-cavity balloon; wherein, the conical head is used for fixing an external cervical orifice, and a forward thrust is required to be maintained when the device is used, so that the contrast agent is prevented from leaking; the double-cavity balloon type is used for fixing an inner cervical orifice, the balloon needs to be filled with liquid when in use, and backward pulling force is maintained to seal the uterine orifice so as to prevent the leakage of contrast agent; the single sheath tube type is free of blockage and only has the function of simply guiding other instruments.

However, the existing hysterosalpingography catheters have the following disadvantages: the conical head needs to maintain forward thrust, and the contrast agent is easy to leak after the conical head is loosened; the double-cavity balloon type use steps are complicated, and complications such as false positive diagnosis and the like are easily caused; the single sheath tube type has no blocking effect, so that liquid is always leaked out during operation, and the sheath tube is not connected with the uterus and is easy to slide off. The sheath guide channel has weak function, can deviate left and right, and the instrument is easy to separate from the sheath and even slide out of the uterine cavity integrally; the push property and the leading-in property of the conduit are poor, and the conduit is easy to deform or even bend; in addition, the prior radiography catheter instrument has complicated operation and long operation time for doctors, and simultaneously increases the pain of patients.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can prevent the contrast medium and can fix the radiography pipe of taking fixing device of other intervention apparatus again against current.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a radiography catheter with a fixing device comprises a catheter tube body, a catheter soft end, a plugging block, a three-way seat, a rotary fixing mechanism, a stop valve and a plugging cap, wherein an inner cavity channel is arranged inside the catheter tube body along the axis of the catheter tube body, and the catheter soft end, the plugging block, the three-way seat and the rotary fixing mechanism are arranged along the axial direction of the catheter tube body from top to bottom; the soft head end of the catheter is fixed at the head end of the catheter tube body, and the plugging block is close to the head end of the catheter tube body and is fixed on the surface of the catheter tube body; the tee joint seat comprises a front support, a side support and a tail support, a tee joint inner cavity channel is arranged in the tee joint seat, the front support is communicated with the inner cavity channel, the side support is communicated with a flow stopping valve, and an external thread and a tail support inner hole are arranged at the tail end of the tail support; the rotary fixing mechanism comprises a circular hole elastic inner core, a hard pressing sheet and a rotary outer joint, the circular hole elastic inner core is tubular, and the hard pressing sheet is annular; the rotary outer joint comprises an inner cone, an inner cavity channel, an inner thread and an outer protruding thread, the inner cone is inserted into a tail support inner hole, the upper surface of the inner cone is attached to the lower surface of a hard pressing sheet, the inner thread is matched with the outer thread, and the inner cavity channel is communicated with the tail support through the hard pressing sheet and a round hole elastic inner core.

Preferably, the flow stopping valve comprises a two-way cavity and a flow stopping inner core, and the flow stopping inner core is positioned inside the two-way cavity.

Furthermore, a first external thread luer connector is arranged at the tail end of the side branch, and the side branch is communicated with one end of the two-way cavity through the first external thread luer connector.

Furthermore, a second external thread luer connector is arranged at the other end of the two-way cavity, and the two-way cavity is connected with the plugging cap through the second external thread luer connector.

Preferably, the plugging block is cylindrical with taper, a cylindrical central inner hole is arranged at the axis position of the plugging block, and the central inner hole is matched with the outer diameter of the catheter body; the plugging block is made of a composite material of medical soft plastic and a developing material, and a medical lubricating coating is coated on the surface of the plugging block.

Preferably, the round hole elastic inner core is made of medical soft plastic, the hard pressing sheet is made of medical hard plastic with low friction coefficient, and the tip of the soft head end of the catheter is subjected to fillet treatment.

Preferably, the soft head end of the catheter is of a single-layer structure, and the soft head end of the catheter is made of a composite material of medical plastics and developing materials.

Furthermore, the soft head end of the catheter is of a double-layer composite structure, the inner layer of the soft head end of the catheter is made of PTFE (polytetrafluoroethylene) materials or low-friction materials, and the outer layer of the soft head end of the catheter is a composite layer of medical plastics and developing materials.

Preferably, the catheter tube body is of a single-layer structure, and the catheter tube body is a medical plastic and developing material composite tube.

Further, the catheter tube body is of a three-layer composite structure, the inner layer of the catheter tube body is made of PTFE (polytetrafluoroethylene) materials or low-friction materials, the middle layer of the catheter tube body is of a metal structure, and the outer layer of the catheter tube body is a composite layer of medical plastics and developing materials.

The utility model discloses following beneficial effect has:

1. the utility model is provided with a cylindrical plugging block with taper near the head end, which can be applied to the uterus and the inner wall of the cervix, so as to achieve the purpose of plugging the uterus and prevent the liquid leakage;

2. when the utility model is fixed in the uterus, temporary passages in vitro and in the uterus can be established through the inner cavity passage of the tube body; other interventional devices such as a catheter, a guide wire and the like can enter the uterus and the fallopian tube through the temporary channel for radiography and dredging treatment;

3. the tail end of the tail support of the utility model is provided with a rotary fixing mechanism, and other interventional instruments are fixed by applying pressure through rotary rotation, so as to ensure that the instruments do not slide out of the uterine cavity in the operation process;

4. the stop valve is arranged on the side branch of the three-way seat, and after the radiography operation is finished, the stop valve can be rotated to close the side branch channel and prevent the countercurrent of the contrast agent;

5. the utility model discloses the pipe body contains development material, possesses the function of developing under the X-ray, and the pipe body is multilayer composite construction, guarantees its propelling movement performance and anti bending property, and the good trafficability characteristic of other apparatus is guaranteed to the low friction material of inner chamber.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a right side view of the present invention;

FIG. 3 is a cross-sectional view taken along plane A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along plane B-B of the present invention;

FIG. 5 is a cross-sectional view taken along plane C-C of the present invention;

FIG. 6 is a front view of the rotary outer joint;

FIG. 7 is a cross-sectional view of the rotating outer joint taken along the plane A-A.

In the figure: 1-soft end of a catheter, 2-catheter body, 3-plugging block, 4-three-way seat, 5-rotary outer joint, 6-check valve, 7-check inner core, 8-two-way cavity, 9-plugging cap, 10-hard pressing sheet, 11-round hole elastic inner core, 12-inner cavity channel, 13-central inner hole, 14-tail support inner hole, 15-three-way inner cavity channel, 16-tube placing opening, 17-rotary fixing mechanism, 18-inner cone, 19-inner cavity channel, 20-internal thread, 21-external raised grain, 41-front support, 42-side support and 43-tail support.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

The utility model provides a take fixing device's radiography pipe, includingpipe body 2, pipe soft end 1,shutoff piece 3, three-way seat 4, rotatory fixed establishment 17, stop flow valve 6 andshutoff cap 9, 2 insideinner chamber passageways 12 that are provided with along 2 axle centers of pipe body, follow 2 axial of pipe body are from last to setting up pipe soft end 1,shutoff piece 3, three-way seat 4 and rotatory fixed establishment 17 down.

The catheter tube body is of a single-layer structure or a three-layer composite structure, and if the catheter tube body is of the single-layer structure, the catheter tube body is a medical plastic and developing material composite tube; if the catheter tube body is of a three-layer composite structure, the inner layer of the catheter tube body is made of PTFE (polytetrafluoroethylene) or low-friction material, the middle layer of the catheter tube body is of a metal structure, the outer layer of the catheter tube body is a composite layer made of medical plastic and developing material, and the metal structure of the middle layer is at least one of the following structures: the metal mesh, the spring and the pipeline are of a single-layer or multi-layer reinforcing structure.

The soft head end 1 of the catheter is fixed at the head end of thecatheter tube body 2, and the tip end of the soft head end 1 of the catheter is subjected to fillet treatment; the soft head end 1 of the catheter can be of a single-layer or double-layer composite structure; if the catheter is of a double-layer structure, the inner layer is made of PTFE (polytetrafluoroethylene) or low-friction material, the outer layer is a composite layer of medical plastic and developing material, the inner layer and the catheter body share the same, and the inner layer and the outer layer are firmly compounded; if the soft tip end 1 of the catheter is a single layer, the soft tip end is made of a composite material of medical plastics and developing materials.

Theplugging block 3 is close to the head end 1 of the catheter tube body and is fixed on the surface of thecatheter tube body 2, theplugging block 3 is in a tapered cylindrical shape, a cylindrical centralinner hole 13 is formed in the axis position of theplugging block 3, and the centralinner hole 13 is matched with the outer diameter of thecatheter tube body 2; theplugging block 3 is made of a composite material of medical soft plastic and a developing material, and a medical lubricating coating is coated on the surface of theplugging block 3.

Thetee joint seat 4 comprises a front support 41, aside support 42 and a tail support 43, a tee jointinner cavity channel 15 is arranged inside thetee joint seat 4, a pipe placing opening 16 is arranged on the inner side of the front support 41, the pipe placing opening 16 is connected with thecatheter tube body 2, the front support 41 is communicated with theinner cavity channel 12, theside support 42 is communicated with the flow stopping valve 6, and an external thread and a tail supportinner hole 14 are arranged at the tail end of the tail support 43.

The flow stopping valve 6 comprises a two-way cavity 8 and a flow stopping inner core 7, wherein the flow stopping inner core 7 is positioned inside the two-way cavity 8 and can control the on-off of fluid in the two-way cavity 8.

A first external thread luer connector is arranged at the tail end of theside branch 42, and theside branch 42 is communicated with one end of the two-way cavity 8 through the first external thread luer connector; the other end of the two-way cavity 8 is provided with a second external thread luer connector, and the two-way cavity 8 is connected with the plugging cap 9 through the second external thread luer connector.

The plugging cap 9 is provided with plugging cap internal threads, a plugging cap inner cone and plugging cap external convex lines, and the plugging cap inner cone can be inserted into a second external thread luer connector and screwed through the plugging cap internal threads in a matched mode so as to plug.

The rotary fixing mechanism 17 comprises a round hole elastic inner core 11, a hard pressing sheet 10 and a rotary outer joint 5; the circular hole elastic inner core 11 is made of medical soft plastic, the circular hole elastic inner core 11 is tubular and has certain elasticity, and has better elastic resilience after being deformed by pressure, and the inner diameter of the circular hole elastic inner core 11 is larger than the outer diameters of other instruments passing through the inner cavity of the circular hole elastic inner core, such as an angiography catheter, a microcatheter and a guide wire; the hard pressing sheet 10 is made of medical hard plastic with low friction coefficient, the hard pressing sheet 10 is in a ring shape, and the diameter of the middle hollow part of the hard pressing sheet is larger than the outer diameter of other instruments such as an angiography catheter, a microcatheter and a guide wire.

The rotary outer joint 5 comprises aninner cone 18, aninner cavity channel 19, aninner thread 20 and an outer raisedline 21, theinner cone 18 is inserted into the tail supportinner hole 14, the upper surface of theinner cone 18 is attached to the lower surface of the hard pressing sheet 10, theinner thread 20 is matched with an outer thread arranged at the tail end of the tail support 43, theinner cavity channel 19 is communicated with the tail support 43 through the hard pressing sheet 10 and the round hole elastic inner core 11, namely theinner cavity channel 19 of the rotary outer joint 5 is communicated with the three-way seat tail support 43, the front support 41 and theinner cavity channel 12 of thecatheter tube 2 through the hard pressing sheet 10 and the round hole elastic inner core 11 to establish an interventional instrument channel; the rotary outer joint 5 can rotate freely, the hard pressing sheet 10 and the circular hole elastic inner core 11 can be compressed by being connected with the thread of the external thread through theinternal thread 20 and then matched with theinner cone 18, the internal diameter of the circular hole elastic inner core 11 is reduced by the compression deformation, and the effect of closing and fixing the instrument passing through theinner cavity channel 12 is realized.

When thecatheter tube body 2 is inserted into the uterus, the outer surface of the taperedcylindrical blocking block 3 is matched with the inner wall of the cervical orifice to block the uterus, and the radiography catheter is fixed at the cervical orifice of the uterus; meanwhile, the rotary fixing mechanism 17 rotates rightwards, and is connected with theinner cone 18 through threads, so that the hard pressing sheet 10 and the circular hole elastic inner core 11 can be pressed tightly, the inner diameter of the circular hole elastic inner core 11 is reduced due to compression deformation, and theinner cavity channel 19 is sealed; the blocking cap 9 is opened by screwing, a contrast agent injector is connected to the first external thread luer joint at the tail end of the side branch 43 to inject contrast agent, and the contrast agent enters the uterus and the oviduct through the three-wayinner cavity passage 15 and theinner cavity passage 12 to realize radiography. After the contrast operation is completed, the side branch 43 can be closed by the flow stop valve 6 to prevent the contrast agent from flowing backward.

When thecatheter tube body 2 is inserted into the uterus, the outer surface of the taperedcylindrical blocking block 3 is matched with the inner wall of the cervical orifice to block the uterus, and the radiography catheter is fixed at the cervical orifice of the uterus; meanwhile, the rotary fixing mechanism 17 rotates leftwards to open theinner cavity channel 19, interventional instruments such as guide wires, catheters and the like are inserted into the rotary fixing mechanism 17 from theinner cavity channel 19 and enter the uterus and the fallopian tube through the three-wayinner cavity channel 15 and theinner cavity channel 12; meanwhile, the tail end rotating and fixing mechanism 17 rotates rightwards, the hard pressing sheet 10 and the circular hole elastic inner core 11 can be pressed tightly by guiding theinner cone 18 through thread matching, the inner diameter of the circular hole elastic inner core 11 is reduced by compression deformation, and an instrument passing through aninner cavity channel 19 is fixed.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims (10)

1. A radiography catheter with a fixing device is characterized in that: the catheter soft end, the plugging block, the three-way seat and the rotary fixing mechanism are arranged along the axial direction of the catheter tube from top to bottom; the soft head end of the catheter is fixed at the head end of the catheter tube body, and the plugging block is close to the head end of the catheter tube body and is fixed on the surface of the catheter tube body; the tee joint seat comprises a front support, a side support and a tail support, a tee joint inner cavity channel is arranged in the tee joint seat, the front support is communicated with the inner cavity channel, the side support is communicated with a flow stopping valve, and an external thread and a tail support inner hole are arranged at the tail end of the tail support; the rotary fixing mechanism comprises a circular hole elastic inner core, a hard pressing sheet and a rotary outer joint, the circular hole elastic inner core is tubular, and the hard pressing sheet is annular; the rotary outer joint comprises an inner cone, an inner cavity channel, an inner thread and an outer protruding thread, the inner cone is inserted into a tail support inner hole, the upper surface of the inner cone is attached to the lower surface of a hard pressing sheet, the inner thread is matched with the outer thread, and the inner cavity channel is communicated with the tail support through the hard pressing sheet and a round hole elastic inner core.

2. A contrast catheter with securement means according to claim 1, wherein: the flow stopping valve comprises a two-way cavity and a flow stopping inner core, and the flow stopping inner core is positioned inside the two-way cavity.

3. A contrast catheter with securement means according to claim 2, wherein: the tail end of the side branch is provided with a first external thread luer connector, and the side branch is communicated with one end of the two-way cavity through the first external thread luer connector.

4. A contrast catheter with securement means according to claim 3, wherein: the other end of the two-way cavity is provided with a second external thread luer connector, and the two-way cavity is connected with the plugging cap through the second external thread luer connector.

5. A contrast catheter with securement means according to claim 1, wherein: the plugging block is cylindrical with taper, a cylindrical central inner hole is arranged at the axis position of the plugging block, and the central inner hole is matched with the outer diameter of the catheter body; the plugging block is made of a composite material of medical soft plastic and a developing material, and a medical lubricating coating is coated on the surface of the plugging block.

6. A contrast catheter with securement means according to claim 1, wherein: the round hole elastic inner core is made of medical soft plastic, the hard pressing sheet is made of medical hard plastic with low friction coefficient, and the tip of the soft head end of the catheter is subjected to fillet treatment.

7. A contrast catheter with securement means according to claim 1, wherein: the soft head end of the catheter is of a single-layer structure, and the soft head end of the catheter is made of composite materials of medical plastics and developing materials.

8. A contrast catheter with securement means according to claim 1, wherein: the soft head end of the catheter is of a double-layer composite structure, the inner layer of the soft head end of the catheter is made of PTFE (polytetrafluoroethylene) materials or low-friction materials, and the outer layer of the soft head end of the catheter is a composite layer of medical plastics and developing materials.

9. A contrast catheter with securement means according to claim 1, wherein: the catheter tube body is of a single-layer structure and is a medical plastic and developing material composite tube.

10. A contrast catheter with securement means according to claim 1, wherein: the catheter tube body is of a three-layer composite structure, the inner layer of the catheter tube body is made of PTFE (polytetrafluoroethylene) materials or low-friction materials, the middle layer of the catheter tube body is of a metal structure, and the outer layer of the catheter tube body is a composite layer made of medical plastics and developing materials.

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