CN114306810A - Medical catheter tube placing device - Google Patents

Abstract

The invention provides a medical catheter tube placing device, belonging to the field of medical article manufacturing; the invention comprises the following steps: a shell, a puncture needle, a guide wire and a catheter; the puncture needle is fixed in the shell and extends out of the puncture end; the guide wire is slidably positioned in the puncture needle, and the catheter is sleeved outside the puncture needle; a slidable push button is arranged on the shell, and the tail part of the guide wire is fixed on the push button; the push button slides towards the puncture end relative to the shell so that the guide wire slides out towards the puncture end along the puncture needle; the shell is also provided with a slidable push rod, and the guide pipe is clamped on the push rod; the push rod slides relative to the housing toward the puncture end to slide the catheter from the puncture needle onto the guide wire. The puncture needle is fixed on the shell, the guide wire is inserted by the slidable push button, and the catheter slides to the inserted guide wire from the puncture needle by the push rod, so that the placement work of the catheter is completed; the invention effectively integrates the guide wire, the catheter and the puncture needle on the same shell, and releases two hands to the maximum, thereby leading the operation to be simpler and more convenient.

Description

Medical catheter tube placing device

Technical Field

The invention relates to the manufacturing technology of medical instruments, in particular to a medical catheter tube placing device, and belongs to the technical field of medical article manufacturing.

Background

With the development of infusion tools, peripheral venous indwelling needles, medium length catheters (MC), Central Venous Catheters (CVC), peripherally inserted central venous catheters (PICC), PORT catheters (PORT), and the like are widely used in clinical practice. Compared with other infusion modes, the medium-length catheter has the advantages of high puncture speed, high safety, low maintenance cost and the like, and provides an economic and safe intravenous infusion mode for patients. The midline catheter is divided into a common type of 20-30 cm and a mini type of 8-10 cm, and the mini midline catheter is more used for replacing the work of an indwelling needle.

The midline catheter is suitable for patients with expected treatment time of 1-4 weeks, and is generally punctured by an improved Seldinger technology under ultrasonic guidance, wherein the puncture point is located in the basilic vein, the brachial vein or the cephalic vein from the upper ankle to the middle third of the vertex of the armpit in the humerus. The catheter tip may be located in the subclavian vein, near the mid-clavicular line location or the axillary thoracic section. The current mainstream puncture procedure is that a puncture needle without a needle core is firstly punctured into a blood vessel through the skin, when a needle point penetrates through the front wall of the blood vessel and enters a blood vessel cavity, and blood is jetted out from a needle tail, the needle insertion is stopped. A guidewire is then inserted through the needle. Then the puncture needle is withdrawn to leave the guide wire which plays a guiding role. And then a skin-breaking knife is used for expanding skin at the puncture point, and a cannula sheath (the tearable sheath and the dilator are arranged inside and the tearable sheath is arranged outside) is fed along the guide wire. The dilator and guidewire are then withdrawn simultaneously and slowly fed through the tearable sheath into the catheter. Finally, the tearable sheath is withdrawn and the catheter is fixed. As can be seen, the whole puncture process has more steps, two hands are needed for operation, and if the ultrasonic probe is used for observing the condition in the blood vessel, the ultrasonic probe needs to be taken and placed for many times, and the puncture part is repositioned. On the other hand, the risk of injury of the inner wall of the blood vessel is increased by multiple times of intravascular instrument replacement, and the difficulty of catheterization operation is also increased.

Therefore, there is a need in the art for a tube placing device that reduces the number of two-handed operations and simplifies the use procedure while ensuring the same functionality.

Disclosure of Invention

The invention provides a novel medical catheter tube placing device, which can complete the tube placing operation of a catheter at one time by arranging a guide wire and a catheter inside and outside a puncture needle so as to solve the technical problem of complicated operation of the tube placing operation in the prior art.

The medical catheter tubing set of the embodiment of the invention comprises: a shell, a puncture needle, a guide wire and a catheter; the housing has a piercing end and an operating end; the puncture needle is fixed in the shell and extends out of the puncture end; the guide wire is slidably positioned in the puncture needle, and the catheter is sleeved outside the puncture needle;

a slidable push button is arranged on the shell, and the tail part of the guide wire is fixed on the push button; the push button slides towards the puncture end relative to the shell, so that the guide wire slides out towards the puncture end along the puncture needle;

the shell is also provided with a slidable push rod, and the guide pipe is clamped on the push rod; the push rod slides relative to the shell towards the puncture end, so that the catheter slides from the puncture needle to the guide wire.

The medical catheter tube placing device is characterized in that a needle seat is fixed in the shell, and the tail part of the puncture needle is fixed in the shell through the needle seat;

a limiting baffle is fixed on the needle seat; the push button is provided with an elastic pressing sheet; one end of the elastic pressing sheet is fixed on the push button, and the other end of the elastic pressing sheet is far away from the push button;

the push button is contacted with the limit baffle through the elastic pressing sheet; the push button slides to the acupuncture end, so that the elastic pressing sheet is clamped between the limiting blocking sheet and the shell.

The medical catheter tube placing device is characterized in that the push button is also provided with an unlocking rod; one end of the unlocking rod is fixed on the push button, and the other end of the unlocking rod is provided with a conical plug;

the tail part of the push rod is provided with a spring clamp, and the spring clamp is provided with a clamping groove with an expandable tail part; a brake card is fixed on the shell; the push rod is clamped on the brake card through the clamping groove;

the push button slides to drive the conical plug to be embedded into the clamping groove, so that the clamping groove is opened and separated from the brake card.

The medical catheter tubing set as described above, wherein the catheter is provided with a joint; a slot with a downward opening is arranged below the push rod; the guide pipe is embedded in the slot through the joint so as to be connected with the push rod;

a sealing plug is arranged on the joint, and the joint is sleeved on the puncture needle through the sealing plug.

The medical catheter tubing set as described above, wherein said housing comprises: an upper housing and a lower housing; the puncture needle is fixed on the lower shell;

the upper shell is clamped on the lower shell, and the puncture end of the upper shell is provided with a U-shaped clamping groove; the opening of the U-shaped clamping groove faces downwards, and the puncturing end of the lower shell is embedded in the U-shaped clamping groove;

a gap is formed between the upper shell and the lower shell and is positioned on the connecting surface of the upper shell and the lower shell; the push rod slides to the puncture end along the gap, so that the lower shell is separated from the U-shaped clamping groove.

The medical catheter tube placing device comprises a lower shell, a needle holder and a needle holder, wherein the needle holder is arranged on the lower shell; the two clamping arms are embedded in the U-shaped clamping grooves; each clamping arm is provided with a sliding groove used for being in contact with the puncture needle.

The medical catheter tube-placing device as described above, wherein the upper housing is provided with a track groove, and the push button is slidably mounted in the track groove.

The medical catheter tube placing device is characterized in that the push rod is provided with a circular arc-shaped sliding head, and the push rod slides on the lower shell through the sliding head;

the push rod slides along the gap, so that the sliding head pushes the two clamping arms away from the middle side.

The medical catheter tube placing device is characterized in that the unlocking rod is provided with an insertion hole, and the guide wire is arranged on the unlocking rod through the insertion hole.

The medical catheter tube placing device is characterized in that the outer surface of the shell is provided with anti-skid lines;

the push rod is of a flat structure with two symmetrical sides.

In the embodiment of the invention, the puncture needle is fixed on the shell, the guide wire is inserted by utilizing the slidable push button, and the catheter slides to the inserted guide wire from the puncture needle by utilizing the push rod, so that the placement work of the catheter is completed; the invention effectively integrates the guide wire, the catheter and the puncture needle on the same shell, and releases two hands to the maximum, thereby leading the operation to be simpler and more convenient.

Drawings

FIG. 1 is a view showing an appearance structure of a guide wire insertion state of a medical catheter insertion device according to an embodiment of the present invention;

FIG. 2 is a side sectional view of an unused state of the medical catheter tubing set in accordance with an embodiment of the present invention;

FIG. 3 is a side cross-sectional view of the guide wire implanting state of the medical catheter device according to the embodiment of the present invention;

FIG. 4 is a schematic view of a pusher bar of a medical catheter placement device in accordance with an embodiment of the present invention;

FIG. 5 is a structural view of an unlocked state of a push button and a push rod of the medical catheter device according to the embodiment of the present invention;

fig. 6 is a lower housing structure view of a medical catheter tubing set in accordance with an embodiment of the present invention.

Detailed Description

The medical catheter tubing set of the present invention may be made of, and is not limited to, the following materials and components, for example: stainless steel needle, medical catheter, guide wire, plastic part, sealing plug, spring leaf, silica gel, etc.

FIG. 1 is a view showing an appearance structure of a guide wire insertion state of a medical catheter insertion device according to an embodiment of the present invention; FIG. 2 is a side sectional view of an unused state of the medical catheter tubing set in accordance with an embodiment of the present invention; fig. 3 is a side sectional view of the guide wire insertion state of the medical catheter tube placement device according to the embodiment of the invention.

As shown in fig. 1 to 3, the medical catheter tubing set of the present embodiment includes: a shell, apuncture needle 1, aguide wire 2 and acatheter 3; the shell is provided with a puncture end and an operation end, wherein the end facing the human body is the puncture end, and the end used for operation and departing from the human body is the operation end; thepuncture needle 1 is fixed in the shell, extends out of the puncture end and is used for puncturing a blood vessel on a human body, so that subsequent operation is facilitated; theguide wire 2 is slidably positioned in thepuncture needle 1; thecatheter 3 is sleeved outside thepuncture needle 1 and can slide along the puncture needle.

Aslidable push button 4 is arranged on the shell, and the tail part of theguide wire 2 is fixed on thepush button 4; the head of theguide wire 2 is obviously inserted into thepuncture needle 1.

Thepush button 4 slides towards the puncture end relative to the shell, so that theguide wire 2 slides out towards the puncture end along thepuncture needle 1, and theguide wire 2 is inserted into a human blood vessel through thepuncture needle 1.

The shell is also provided with aslidable push rod 5, and theconduit 3 is clamped on thepush rod 5; thepush rod 5 slides relative to the housing toward the puncture tip to slide thecatheter 3 from thepuncture needle 1 onto theguide wire 2.

In the embodiment of the invention, the puncture needle is fixed on the shell, the guide wire is inserted by utilizing the slidable push button, and the catheter slides to the inserted guide wire from the puncture needle by utilizing the push rod, so that the placement work of the catheter is completed; the invention effectively integrates the guide wire, the catheter and the puncture needle on the same shell, and releases two hands to the maximum, thereby leading the operation to be simpler and more convenient.

In one case, as shown in fig. 2 to 6, aneedle seat 8 is fixed in the shell, and the tail part of thepuncture needle 1 is fixed in the shell through theneedle seat 8; theneedle seat 8 is fixed on thelower shell 7.

A limitingbaffle 80 is fixed on theneedle seat 8; thepush button 4 is provided with anelastic pressing sheet 42; one end (fixed end) of theelastic pressing sheet 42 is fixed on thepush button 4, and the other end (free end) is far away from thepush button 4; theresilient tab 42 is a resilient rod-like or sheet-like structure.

Thepush button 4 is contacted with thelimit stop piece 80 through theelastic pressing sheet 42; thepush button 4 slides to the acupuncture end, so that theelastic pressing sheet 42 is clamped between thelimiting stop piece 80 and the shell.

Specifically, a smaller space is provided between the limitingblocking piece 80 and theupper shell 6, and in the sliding process, the elasticpressing piece 42 is influenced by the limitingblocking piece 80 to continuously extrude the elasticpressing piece 42 upwards, so that the elasticpressing piece 42 is finally clamped between the limitingblocking piece 80 and theupper shell 6 to prevent thepush button 4 from continuously sliding forwards.

Meanwhile, in the sliding process of thepush button 4, the deformation of theelastic pressing sheet 42 is gradually increased, and the sliding thrust of thepush button 4 can also be gradually increased, so that the push button can remind an operator that the push button is about to be in place.

In general, the free end of thespring pressing plate 42 has a protrusion, and finally, the protrusion is completely engaged with the groove of thelimit stop 80, so as to prevent thepush button 4 from sliding further, and also fix the position of thepush button 4, thereby playing a role of fixing theguide wire 2.

The structure of the limitingbaffle 80 can be a projection with a numerical value or a groove; after the elastic pressingsheet 42 moves to the limitingblocking piece 80, the elastic pressing sheet can be matched with the protrusion or the groove, so that thepush button 4 is prevented from sliding backwards (when the limitingblocking piece 80 is the groove, the elastic pressing sheet is completely clamped in the groove, so that thepush button 4 is prevented from sliding forwards or backwards), and misoperation is avoided.

In the medical catheter tubing set of the embodiment, thepush button 4 is further provided with anunlocking rod 41; one end of theunlocking rod 41 is fixed on thepush button 4, and the other end is provided with aconical plug 43; thetapered plug 43 is tapered at its front end and has a cross section that gradually decreases in the forward direction, i.e., the front end is smaller than the rear end.

The tail part of thepush rod 5 is provided with aspring clamp 53, and thespring clamp 53 is provided with a clampinggroove 530 with an expandable tail part; abrake clamp 81 is fixed on the shell and is a protrusion with a rectangular cross section and is used for being embedded in the clampinggroove 530; specifically, aneedle seat 8 is arranged on thelower shell 7, and abrake clip 81 is fixed on the top of theneedle seat 8. For the convenience of integrated manufacture, the limitingblock piece 80 is arranged on the top of thebraking card 81.

Thepush rod 5 is clamped on thebrake clamp 81 through the clampinggroove 530; when the engaginggroove 530 is engaged with thestopper 81 by the resilient force of thespring clip 53, theentire push rod 5 cannot slide relative to the housing.

In practical use, thecard slot 530 has atail opening 531, and thetail opening 531 is a triangular opening; therear opening 531 can be pushed open by other means.

Thepush button 4 slides to drive theconical plug 43 to be embedded into theslot 530, and the tip of theconical plug 43 gradually opens thetail opening 531, so that theslot 530 opens and disengages from thebrake clip 81.

At this point thepush button 4 has played with the insertion of theguide wire 2 and theguide wire 2 has entered the locked state; at the same time, thepush button 4 releases the locking state of thepush rod 5 by thetaper plug 43, so that thepush rod 5 can drive thecatheter 3. The design of the invention avoids misoperation to the maximum extent, can solidify the operation flow, simplifies the operation steps, ensures the operation safety and improves the efficiency to the maximum extent.

As shown in fig. 5, further, since the elasticpressing piece 42 is provided below thelock release lever 41 in order to use the space intensively, the tip end of the elasticpressing piece 42 can be just engaged with thestopper piece 80 when thepush button 4 is moved to the predetermined position. At this time, the space between the limitingblocking piece 80 and the unlockinglever 41 is completely filled by the elastic pressingsheet 42, which not only plays a role of preventing thepush button 4 from further sliding, but also can intensively utilize the space, so that thewhole push button 4 is limited in the crack of thespring clamp 53 in the sliding process, and thespring clamp 53 is equivalent to a sliding rail for limiting the elastic pressingsheet 42.

In the medical catheter arranging device of the present embodiment, as shown in fig. 3 and 4, thecatheter 3 is provided with aconnector 30; aslot 52 with a downward opening is arranged below thepush rod 5; theguide tube 3 is embedded in theslot 52 through the joint 30 so as to be connected with thepush rod 5; because theslot 52 is open downwards, after thewhole catheter 3 is put into the device, the corresponding components of thepush rod 5 only need to be lifted upwards to be conveniently removed from thecatheter 3.

A sealing plug is arranged on the joint 30, and the joint 30 is sleeved on thepuncture needle 1 through the sealing plug.

After thecatheter 3 is placed, theneedle seat 8 and thepuncture needle 1 need to be removed from the rear, and at the moment, the sealing plug can ensure that thepuncture needle 1 cannot leak after being removed from the tail part of thecatheter 3, and can be conveniently connected with other equipment.

As shown in fig. 2, 3 and 5, a limitingbase 85 is further fixed on theneedle base 8, the top of the limitingbase 85 is slightly higher than theneedle base 8, and the upper surface of the limitingbase 85 is used for contacting with thespring clip 53 of the push rod, so that thespring clip 53 can slide on the top surface of the limitingbase 85, and the distance between thepush rod 5 and thepush button 4 can also be compressed, so that the elasticpressing piece 42 of the push button can slide in the gap of thespring clip 53.

Thelimit base 85 can also ensure that a certain distance is reserved between the joint 30 and theneedle seat 8, and the sealing plug can be abutted against thelimit base 85.

The medical catheter tubing set of this embodiment, the housing comprises: anupper case 6 and alower case 7; thepuncture needle 1 is fixed on thelower shell 7; specifically, aneedle seat 8 is arranged on thelower shell 7, and thepuncture needle 1 is fixed on theneedle seat 8.

Theupper case 6 is engaged with thelower case 7, and theupper case 6 can be separated from thelower case 7 by being lifted up, thereby separating the cases. The puncture end of theupper shell 6 is provided with aU-shaped clamping groove 61; the U-shaped engaginggroove 61 has a downward opening, and the piercing end of thelower case 7 is fitted into the U-shaped engaginggroove 61.

A gap is formed between theupper shell 6 and thelower shell 7; the gap is positioned on the connecting surface of theupper shell 6 and thelower shell 7; thepush rod 5 slides along the gap to the puncturing end, so that the gap is enlarged, and thelower shell 7 is further away from theupper shell 6, so that thelower shell 7 is separated from theU-shaped clamping groove 61. The automatic separation of the upper shell and the lower shell after theconduit 3 is placed is realized.

More preferably, the puncturing end of thelower housing 7 is provided with two clampingarms 70 which can be opened and closed left and right; the two clampingarms 70 are embedded in theU-shaped clamping groove 61; each of the holdingarms 70 is provided with a slide groove for contacting thepuncture needle 1. When the two clampingarms 70 are embedded by theU-shaped clamping groove 61, the two sliding grooves form a sliding groove which can penetrate through thepuncture needle 1 and thecatheter 3, so that thepuncture needle 1 is ensured not to shake in the puncture process, and thecatheter 3 can be ensured to smoothly pass through the sliding groove.

In practical use, in order to facilitate disassembly and assembly, theupper housing 6 is provided with atrack groove 60, and thepush button 4 is slidably mounted in thetrack groove 60.

Thepush button 4 can slide along the length direction of thetrack groove 60, thereby realizing the insertion of theguide wire 2.

In the medical catheter indwelling device of the embodiment, thepush rod 5 is provided with an arc-shaped slidinghead 51, and thepush rod 5 slides on thelower shell 7 through the slidinghead 51; the front end and the lower end of the slidinghead 51 are both arc-shaped structures, and sliding friction force can be reduced.

Thepush rod 5 slides along the slit so that the slidinghead 51 pushes the two holdingarms 70 away from the middle side. Thus, after thecatheter 3 is placed, the lower shell and the components on thepush rod 5 can be conveniently removed, so that the whole device can be quickly disassembled for subsequent operation.

Moreover, the slidinghead 51 pushes therod holding arm 70, which ensures that theneedle seat 8 on thelower casing 7 and thepuncture needle 1 slide backwards relative to thecatheter 3, thereby ensuring that thecatheter 3 is not bent during the process of removing the puncture needle, and further enhancing the operation safety.

In the medical catheter tube placing device of the present embodiment, as shown in fig. 2, an insertion hole is provided on the unlockingrod 41, and theguide wire 2 is mounted on the unlockingrod 41 through the insertion hole.

Generally, the outer surface of the shell is provided with anti-skid lines, so that friction can be increased in the operation process, and the device is prevented from falling or being difficult to apply force; in addition, thepush rod 5 is a flat structure with symmetrical two sides, so that thecatheter 3 can be conveniently implanted in a finger pinching mode, fine operation can be guaranteed, and friction force between the push rod and fingers can be increased.

The medical catheter tube placing device provided by the embodiment of the invention has the advantages that:

1. compared with the common sardine puncture needing skin expansion, the device has smaller wound and reduces complicated operation steps, the whole tube placing operation only needs to puncture a specified blood vessel, push the push button and then push the push rod to drive the catheter, and finally the push rod on the catheter is separated, thereby shortening the tube placing time.

2. The operation process of the device is solidified by utilizing the plurality of limiting blocking pieces; the parts needing manual operation are a push button and a push rod, the push button achieves that the hand operation part is in the front part, and the guide wire control part is in the rear part; the push rod is also located at the front.

3. When a user holds the back half part of the device by hand, the two parts can be operated by fingers with one hand, thereby being convenient for medical staff to operate.

4. The anti-misoperation structure ensures that the catheter operation can be started after the guide wire is implanted in place, thereby avoiding the damage of instruments caused by improper operation and avoiding the secondary use of the device.

In addition, the medical catheter tube placing device is low in manufacturing cost, small and exquisite, compact in structural design, stable in finished product quality, convenient to operate and suitable for various modified catheter implantation devices.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the above embodiment method can be implemented by some modifications plus the necessary general technical overlap; of course, the method can also be realized by simplifying some important technical features in the upper level. Based on such understanding, the technical solution of the present invention essentially or contributing to the prior art is: the whole structure and the connection mode are matched with the structure of each embodiment of the invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A medical catheter tubing set, comprising: a shell, a puncture needle, a guide wire and a catheter; the housing has a piercing end and an operating end; the puncture needle is fixed in the shell and extends out of the puncture end; the guide wire is slidably positioned in the puncture needle, and the catheter is sleeved outside the puncture needle;

a slidable push button is arranged on the shell, and the tail part of the guide wire is fixed on the push button; the push button slides towards the puncture end relative to the shell, so that the guide wire slides out towards the puncture end along the puncture needle;

the shell is also provided with a slidable push rod, and the guide pipe is clamped on the push rod; the push rod slides relative to the shell towards the puncture end, so that the catheter slides from the puncture needle to the guide wire.

2. The catheter assembly of claim 1 wherein a hub is secured within said housing, and wherein said needle is secured at its tail within said housing by said hub;

a limiting baffle is fixed on the needle seat; the push button is provided with an elastic pressing sheet; one end of the elastic pressing sheet is fixed on the push button, and the other end of the elastic pressing sheet is far away from the push button;

the push button is contacted with the limit baffle through the elastic pressing sheet; the push button slides to the acupuncture end, so that the elastic pressing sheet is clamped between the limiting blocking sheet and the shell.

3. The medical catheter tubing set of claim 1 wherein the push button is further provided with an unlocking lever; one end of the unlocking rod is fixed on the push button, and the other end of the unlocking rod is provided with a conical plug;

the tail part of the push rod is provided with a spring clamp, and the spring clamp is provided with a clamping groove with an expandable tail part; a brake card is fixed on the shell; the push rod is clamped on the brake card through the clamping groove;

the push button slides to drive the conical plug to be embedded into the clamping groove, so that the clamping groove is opened and separated from the brake card.

4. The medical catheter tubing set of claim 1 wherein the catheter is provided with a fitting; a slot with a downward opening is arranged below the push rod; the guide pipe is embedded in the slot through the joint so as to be connected with the push rod;

a sealing plug is arranged on the joint, and the joint is sleeved on the puncture needle through the sealing plug.

5. The medical catheter tubing set of claim 1, wherein the housing comprises: an upper housing and a lower housing; the puncture needle is fixed on the lower shell;

the upper shell is clamped on the lower shell, and the puncture end of the upper shell is provided with a U-shaped clamping groove; the opening of the U-shaped clamping groove faces downwards, and the puncturing end of the lower shell is embedded in the U-shaped clamping groove;

a gap is formed between the upper shell and the lower shell and is positioned on the connecting surface of the upper shell and the lower shell; the push rod slides to the puncture end along the gap, so that the lower shell is separated from the U-shaped clamping groove.

6. The medical catheter tube placing device according to claim 5, wherein the puncturing end of the lower housing has two clamping arms which open and close left and right; the two clamping arms are embedded in the U-shaped clamping grooves; each clamping arm is provided with a sliding groove used for being in contact with the puncture needle.

7. The catheter device according to claim 5, wherein the upper housing has a track groove, and the push button is slidably mounted in the track groove.

8. The medical catheter tube placing device according to claim 6, wherein the push rod is provided with a circular arc-shaped sliding head, and the push rod slides on the lower shell through the sliding head;

the push rod slides along the gap, so that the sliding head pushes the two clamping arms away from the middle side.

9. The catheter device according to claim 3, wherein the unlocking rod is provided with an insertion hole through which the guide wire is mounted on the unlocking rod.

10. The catheter device according to any one of claims 1-5, wherein the outer surface of the housing is provided with anti-slip threads;

the push rod is of a flat structure with two symmetrical sides.

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