CN113288356B

CN113288356B - Central venous puncture device

Info

Publication number: CN113288356B
Application number: CN202110551238.3A
Authority: CN
Inventors: 李俊梅; 朱丽娟; 李志军
Original assignee: Hebei Yihe Technology Development Co ltd
Current assignee: Hebei Yihe Technology Development Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-07-08
Anticipated expiration: 2041-05-20
Also published as: CN113288356A

Abstract

The invention discloses a central venous puncture outfit, which belongs to the technical field of medical instruments and comprises an injector, a puncture needle, a preset catheter and a shell, wherein one end of a special-shaped needle tube section of the puncture needle is connected with the injector, the other end of the special-shaped needle tube section of the puncture needle is connected with a straight needle tube section of the puncture needle, and the preset catheter, the special-shaped needle tube section of the puncture needle and a tube body of the injector are arranged in the shell; the preset catheter is sleeved on the straight needle tube section of the puncture needle, the tail end of the puncture needle is provided with a puncture part exposed out of the shell, and the preset catheter is driven by the rotary translation mechanism to rotate and slide to the puncture part along the straight needle tube section of the puncture needle. The injector, the puncture needle and the preset catheter are integrated in the shell, and the preset catheter is driven by the rotary translation mechanism to slide to the puncture part along the straight needle tube section of the puncture needle, so that the preset catheter is placed in the central vein. The invention omits the actions of an expander, a guide wire for placing, a transfusion tube guided into the central vein and the like, saves the time for placing the reserved catheter, improves the success rate of puncture and reduces the pain of patients.

Description

Central venous puncture device

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a central venous puncture outfit.

Background

The central vein puncture catheterization technology is a clinical commonly used diagnosis and treatment means, and is widely applied to operative anesthesia, circulation function and treatment, interventional examination and treatment of critical patients with hemodynamics instability, hemodynamics monitoring of patients with low-temperature and controlled blood pressure reduction, chemotherapy infusion passages of tumor patients with difficulty in peripheral blood vessel puncture, venous hyperalimentation treatment, rescue treatment of critical patients and the like. At present, the main apparatus used for central venipuncture catheterization is a central venipuncture suite, and generally comprises a central venipuncture needle, a guide steel wire, an expander and a central venous catheter. The operation steps are as follows:

firstly, after the puncture needle penetrates into the central vein, the guide steel wire is placed firstly, and then the puncture needle is withdrawn; the skin is dilated by a skin dilator and then placed into the central venous catheter along the guide wire.

The disadvantages of this method are: if the guide steel wire is placed along the puncture needle for too long time, the guide steel wire can touch the heart, and arrhythmia is possibly caused; when the puncture personnel have poor skills, the guide steel wire is bent, the catheter is difficult to insert, and the puncture fails.

In addition, after the central vein of the existing puncture needle is punctured successfully, a guide steel wire needs to be placed into the central vein along the puncture needle cavity through the side hole of the central vein puncture needle. Although effective in placing the guidewire into the central vein, the guidewire must pass through a blood-filled needle lumen, which is about 10cm in length, during placement. The operation difficulty is higher, and the requirement on the technical skill of an operator is high. Particularly, when the mutual matching between patients or operators is unstable, the central vein or the puncture needle of the patients is easy to move, so that the puncture needle tip is deviated and departed from the central vein, thereby leading the failure of the guide steel wire to be placed into the central vein and bringing pain and discomfort to the patients.

Disclosure of Invention

The invention aims to solve the technical problem that arrhythmia is easily caused by the fact that a guide steel wire is arranged along a puncture needle to touch the heart in the prior art; the technical problem that the skin expanding of the dilator has higher technical requirements on operators is solved.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a central venous puncture device comprises an injector, a puncture needle, a preset catheter and a shell, wherein the puncture needle comprises a straight needle tube section and a special-shaped needle tube section; the preset catheter is sleeved on the straight needle tube section of the puncture needle, the tail end of the puncture needle is provided with a puncture part exposed out of the shell, the puncture part is arranged at the tail end of the straight needle tube section, and the shell is internally provided with a rotary translation mechanism for driving the preset catheter to rotate and slide to the puncture part along the straight needle tube section of the puncture needle.

Preferably, the rotary translation mechanism comprises a screw rod with a spiral groove on the outer circle and a force application part for rotating the screw rod, two ends of the screw rod are in running fit with two ends of the shell, a rotating wheel which is used for being meshed with the screw rod and a joint which is used for being matched with the infusion connecting sleeve are arranged at the tail part of the preset guide pipe, and the rotating wheel is fixedly connected with the preset guide pipe; the outer circle of the rotating wheel is provided with a spiral thread matched with the screw rod, and the inner part of the spiral groove of the screw rod and the top surface of the thread of the rotating wheel are provided with mutually meshed tooth shapes; the outer diameter of the joint is smaller than that of the rotating wheel, and the inner hole of the preset guide pipe extends into the rotating wheel and the joint and two ends of the preset guide pipe are communicated.

Preferably, the force application part is a circular force application part or an S-shaped crank, and the force application part is arranged outside the shell and is arranged at two ends of the shell opposite to the puncture part of the puncture needle.

Preferably, the tube body of the syringe is arranged in a shell, a sliding block used for pushing and pulling the piston rod of the syringe is arranged outside the shell, a sliding groove matched with the sliding block is formed in the surface of the shell, one end of the sliding block is connected with the piston rod, and a groove matched with a thumb is formed in the surface of the other end of the sliding block. The slider is L shape, and the short limit portion links firmly with the piston rod, and the surperficial sliding fit of long limit portion and casing.

Preferably, the special-shaped needle tube section is S-shaped and comprises a straight line section and bending sections at two ends of the straight line section, the straight line section of the special-shaped needle tube section is parallel to a tube body of the injector and a preset guide tube, and the bending sections at two ends of the special-shaped needle tube section are respectively connected with the tail ends of the injector and the straight needle tube section.

Preferably, the tube body of the injector is arranged close to the front end of the shell, and the rotating wheel on the preset guide tube is arranged close to the rear end of the shell.

Preferably, the shell is made of a transparent material; the shell is in a circular tube shape.

Preferably, a partition board is arranged in the shell and used for separating the tube body of the injector from the preset guide tube.

Preferably, a sealed cavity defined by the preset conduit, the shell and the partition board can be filled with heparin water for soaking the preset conduit; the end part of the shell is provided with an opening matched with the preset catheter, the opening is provided with a plugging component sleeved outside the preset catheter, and the plugging component is of a split structure.

Preferably, two openings for penetrating the inner pipeline are correspondingly arranged on the needle head at the tail end of the puncture part of the puncture needle.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the invention integrates the injector, the puncture needle and the preset catheter in the shell, the preset catheter is sleeved on the straight needle tube section of the puncture needle, and the special-shaped needle tube section of the puncture needle is connected with the injector; the preset catheter can be driven to rotate and slide to the puncture part along the straight needle tube section of the puncture needle through the rotary translation mechanism, and the preset catheter is placed in the central vein. The invention has simple and compact structure, omits the actions of an expander, a guide wire for guiding the infusion tube to enter the central vein and the like, is convenient to use, cancels the expander, saves the insertion time of the reserved catheter, thereby effectively improving the success rate of puncture and reducing the pain of patients.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of a central venipuncture outfit provided by an embodiment of the invention;

FIG. 2 is a schematic view of the structure of the needle of FIG. 1;

FIG. 3 is a schematic view of the pre-placement catheter of FIG. 1;

FIG. 4 is a partial view of the piercing tip of the piercing needle in an embodiment of the present invention;

FIG. 5 is a left side view of FIG. 4;

FIG. 6 is an end view of the housing in an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 1 at A;

in the figure: 1-an injector, 2-a puncture needle, 21-a straight needle tube section, 22-a special-shaped needle tube section, 220-a straight line section, 221-a bending section and 23-a puncture part; 3-preset conduit, 4-shell, 5-screw, 6-force application component, 7-rotating wheel, 8-opening, 9-partition board, 10-tube, 11-piston rod, 12-nut, 13-slide block, 14-chute and 15-groove; 16-joint, 17-clip, 18-plug, 19-tooth form.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.

The central venous puncture device shown in fig. 1 comprises an injector 1, a puncture needle 2, a preset catheter 3 and a shell 4, wherein the puncture needle 2 comprises a straight needle tube section 21 and a special-shaped needle tube section 22, one end of the special-shaped needle tube section 22 of the puncture needle 2 is connected with the injector 1, the other end of the special-shaped needle tube section 22 of the puncture needle 2 is connected with the straight needle tube section 21, the preset catheter 3, the special-shaped needle tube section 22 of the puncture needle 2 and a tube body 10 of the injector 1 are all arranged in the shell 4, and the tail end of a piston rod 11 of the injector 1 is exposed out of the shell 4; the preset catheter 3 is sleeved on the straight needle tube section 21 of the puncture needle 2, a puncture part 23 exposed out of the shell 4 is arranged at the tail end of the puncture needle 2, the puncture part 23 is arranged at the tail end of the straight needle tube section 21, and a rotation and translation mechanism is arranged in the shell 4 and used for driving the preset catheter 3 to rotate and slide to the puncture part 23 along the straight needle tube section 21 of the puncture needle 2. Adopt this structure can practice thrift the time of putting into of presetting the pipe, adopt rotatory mode to put into and preset the reducible insertion resistance of pipe, saved the use of expanding the skin ware, avoid expanding skin ware misoperation and arouse that to preset the pipe distortion, cause the appearance of presetting position change and patient uncomfortable state.

In one embodiment of the present invention, as shown in fig. 1 and 6, the rotational translation mechanism includes a screw rod 5 with a spiral groove on the outer circle and a force application component 6 for rotating the screw rod 5, two ends of the screw rod 5 are rotatably matched with two ends of the housing 4, the tail of the preset conduit 3 is provided with a rotating wheel 7 for being externally engaged with the screw rod 5 and a joint 16 for being matched with an infusion connection kit, and the rotating wheel 7 is fixedly connected with the preset conduit 3; the outer circle of the rotating wheel is provided with spiral threads matched with the screw rod, and the spiral groove of the screw rod 5 and the tooth top surface of the rotating wheel 7 are provided with tooth shapes 19 which are meshed with each other; the external part of the joint 16 is provided with an external thread matched with the infusion connecting sleeve, the external diameter of the joint 16 is smaller than that of the rotating wheel 7, and the inner hole of the preset conduit 3 extends into the rotating wheel 7 and the joint 16 and two ends of the preset conduit are communicated. During operation, the screw is in threaded fit with the rotating wheel, the rotating wheel is driven to move forwards by rotating the screw, and meanwhile, the rotating wheel is driven to rotate by means of the meshed tooth shapes, so that transmission is stable. The force application part is rotated to drive the screw rod and the rotating wheel to rotate, so that the preset catheter is driven to be pushed forwards in a rotating mode along the straight needle tube section of the puncture needle, and the puncture needle is used as a guide to rotate to enter the skin to realize vein insertion. Because the rotating mode can reduce the insertion resistance, the vein catheterization operation can be finished without a skin expander. After the preset catheter enters a preset position, the preset catheter is pulled out of the shell, and the infusion connecting kit is installed at the joint.

During specific manufacturing, the preset conduit, the rotating wheel and the joint can be integrally formed by injection molding of plastic materials, the spiral threads on the outer circle of the rotating wheel can be designed into complete threads or discontinuous threads, and the external threads on the screw rod and the rotating wheel can be designed into single threads or double threads.

In one embodiment of the present invention, as shown in fig. 1, the urging member 6 is a circular urging member or an S-shaped crank, and the urging member 6 is provided outside the housing 4 and at both ends of the housing 4 opposite to the puncture part 23 of the puncture needle 2. Of course, the force application component can also be a micro motor to drive the screw rod to rotate.

Further optimizing the above technical solution, the tube 10 of the syringe 1 is disposed in the housing 4, the outer portion of the housing 4 is provided with a slider 13 for pushing and pulling the piston rod 11 of the syringe 1, the surface of the housing 4 is provided with a chute 14 engaged with the slider 13, one end of the slider 13 is connected with the piston rod 11, and the other end surface of the slider 13 is provided with a groove 15 engaged with the thumb. The slider 13 is L-shaped, the short edge part is fixedly connected with the piston rod 11, the long edge part is in sliding fit with the surface of the shell 4, and the groove 15 is formed in the tail end surface of the long edge part. By adopting the structure, the injector can be conveniently held by one hand, the sliding block can be easily pushed by the thumb, and then the piston rod is driven, so that the operation is more stable and reliable.

In an embodiment of the present invention, as shown in fig. 1 and 2, the special-shaped needle tube section 22 is S-shaped, and includes a middle straight-line section 220 and two bent sections 221, the straight-line section 220 of the special-shaped needle tube section 22 is parallel to the tube body 10 of the syringe 1 and the preset catheter 3, and the bent sections 221 at two ends of the special-shaped needle tube section 22 are respectively connected to the tail ends of the syringe 1 and the straight needle tube section 21. The tube 10 of the syringe 1 is arranged near the front end of the housing 4, and the rotating wheel 7 on the preset conduit 3 is arranged near the rear end of the housing 4. By adopting the structure, the whole structure is more compact, and the spatial layout is more reasonable.

In the specific manufacturing process, the shell 4 is made of transparent materials, and the shell 4 is in a circular tube shape. As shown in fig. 6, the body 10 of the syringe 1 is separated from the pre-placement catheter 3 and the straight needle section 21 by a septum. In addition, the preset conduit 3 and the tube body 10 of the injector 1 are provided with scales. The detention position of the preset catheter can be conveniently controlled by means of the structure. When the preset catheter enters a preset scale mark on the preset catheter (12 cm-15 cm for adult).

In an embodiment of the present invention, as shown in fig. 1 and 2, a sealed cavity surrounded by the preset conduit 3, the housing 4 and the partition board can be filled with heparin water for soaking the preset conduit 3; an opening matched with the

preset conduits

6 and 3 is formed in the end part of the shell 4, and a plugging component sleeved outside the preset conduit 3 is arranged at the opening; as shown in fig. 7, the plugging component is a split structure, and includes a plug 18 and an external clamp 17 thereof, the plug 18 and the clamp 17 are both sleeved outside the preset catheter 3, the lateral surfaces of the plug 118 and the clamp 17 are both provided with longitudinal slits, and the slits of the plug 118 and the slit of the clamp 17 are staggered; the split of clamp links to each other through the brace, the both sides of brace are equipped with the indentation, but brace and clamp one shot forming during the preparation. When the device is used, the tilting part at one end of the light pulling strip can be easily torn off, the hoop and the blockage can be conveniently stripped from the preset guide pipe, and then the preset guide pipe can be pulled out from the shell along the opening.

In one embodiment of the present invention, as shown in fig. 4 and 5, two openings 8 for penetrating the internal channel are correspondingly formed at the tip of the puncture part 23 of the puncture needle 2. By adopting the structure, the preset catheter can be conveniently and smoothly sleeved on the puncture needle, and the side wall of the preset catheter is prevented from being scratched. In particular, the shape of the opening can be circular, oval or other shapes. The specific shape of the opening is designed according to actual needs, and the specific shape is not limited herein.

The application process of the invention is as follows:

the hand-held puncture outfit inserts the end puncture part 23 needle of the puncture needle 2 into the preset vein to withdraw blood, a dermatotome is used for cutting the outer skin, the left hand holds the shell 4 of the puncture outfit to stabilize the direction, the right hand rotates the rear part to rotate the knob 6, the knob drives the screw rod 5 to rotate, further drives the screw nut 12 to move along the screw rod, the rotating wheel 7 which is meshed with the screw nut 12 drives the preset catheter 3 to move forwards in a rotating mode, and thus the preset catheter 3 rotates to enter the skin by taking the straight needle tube section 21 needle bar of the puncture needle as a guide and is placed into the vein.

Wherein: after the puncture needle 2 is inserted into the preset vein, the blood needs to be drawn back for confirmation. In the operation, blood is pumped through the syringe 1, the shell 4 is held by the left hand, the groove 15 on the sliding block 13 is pressed by the thumb, the sliding block 13 is easily pushed and pulled, the piston rod 11 of the syringe 1 is driven to translate, and the blood pumping operation can be completed by one hand in a stable state.

When the preset catheter enters a preset scale mark (12-15 cm for an adult or is kept to a proper depth required by operation), the left hand holds the skin external preset catheter, and the right hand withdraws the puncture outfit backwards to complete catheterization. The catheter is preset and then the conventional operation is carried out: an infusion connecting set is screwed at a joint at the tail part of the preset catheter (the infusion connecting set can be selected from the existing disposable invasive pressure sensor or a disposable sterile cock, and is provided with two or more pipe joints of a main pipe and an auxiliary pipe, so that subsequent operations such as infusion and the like are facilitated), an exhaust flushing pipe, a seam cover fixing and the like are arranged. The infusion connection kit can be a disposable invasive pressure monitoring sensor or a common infusion kit, and the product and the conventional operation belong to the prior art and are not described in detail herein.

The special-shaped needle tube section of the invention adopts an S-shaped connecting injector, can withdraw blood at any time to determine whether the preset catheter is in the blood vessel, and completes the tube placement by combining the alternate operation of rotating the tube, so that doctors and nurses can grasp and control the operation process of tube placement more easily. After the guide wire is placed in the original puncture operation process, whether the entering position is changed or not cannot be detected, and the shaking in the puncture tube placing process can possibly cause the needle head to deviate from the blood vessel.

The puncture outfit is particularly important for the use of emergency treatment and ICU departments, precious treatment time is won for patients, and the importance of the puncture outfit can be reflected in the unconventional environment of 120-visit (for example, a rescue site cannot be operated aseptically, and a large amount of fluid infusion treatment is needed).

In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and thus the present invention is not limited to the specific embodiments disclosed above.

Claims

1. A central vein puncture outfit is characterized in that: the puncture needle comprises a straight needle tube section and a special-shaped needle tube section, one end of the special-shaped needle tube section of the puncture needle is connected with the syringe, the other end of the special-shaped needle tube section of the puncture needle is connected with the straight needle tube section, the preset catheter, the special-shaped needle tube section of the puncture needle and a tube body of the syringe are arranged in the shell, and the tail end of a piston rod of the syringe is exposed out of the shell; the preset catheter is sleeved on the straight needle tube section of the puncture needle, the tail end of the puncture needle is provided with a puncture part exposed out of the shell, the puncture part is arranged at the tail end of the straight needle tube section, and the shell is internally provided with a rotary translation mechanism for driving the preset catheter to rotate and slide to the puncture part along the straight needle tube section of the puncture needle;

The special-shaped needle tube section is S-shaped and comprises a straight line section and bending sections at two ends of the straight line section, the straight line section of the special-shaped needle tube section is parallel to a tube body of the injector and a preset guide tube, and the bending sections at two ends of the special-shaped needle tube section are respectively connected with the tail ends of the injector and the straight needle tube section;

the rotary translation mechanism comprises a screw rod with a spiral groove on the excircle and a force application component for rotating the screw rod, two ends of the screw rod are in running fit with two ends of the shell, the tail part of the preset guide pipe is provided with a rotating wheel which is meshed with the screw rod and a joint which is matched with the infusion connecting sleeve, and the rotating wheel is fixedly connected with the preset guide pipe; the outer circle of the rotating wheel is provided with a spiral thread matched with the screw rod, and the inner part of the spiral groove of the screw rod and the top surface of the thread of the rotating wheel are provided with mutually meshed tooth shapes; the outer diameter of the joint is smaller than that of the rotating wheel, the inner hole of the preset guide pipe extends into the rotating wheel and the joint, and two ends of the preset guide pipe are communicated.

2. The central venipuncture apparatus of claim 1, wherein: the force application component is a round force application component or an S-shaped crank, and the force application component is arranged outside the shell and is arranged at two ends of the shell opposite to the puncture part of the puncture needle.

3. The central venipuncture apparatus of claim 1, wherein: the outer part of the shell is provided with a sliding block used for pushing and pulling a piston rod of the syringe, the surface of the shell is provided with a sliding groove matched with the sliding block, one end of the sliding block is connected with the piston rod, and the surface of the other end of the sliding block is provided with a groove matched with a thumb.

4. The central venipuncture apparatus of claim 1, wherein: the tube body of the injector is arranged close to the front end of the shell, and the rotating wheel on the preset guide tube is arranged close to the rear end of the shell.

5. The central venipuncture apparatus of claim 1, wherein: the shell is made of transparent materials; the shell is in a circular tube shape.

6. The central venipuncture apparatus of claim 1, wherein: a partition board is arranged in the shell and used for separating the tube body of the injector from the preset guide tube.

7. The central venipuncture apparatus of claim 1, wherein: the sealed cavity formed by the preset conduit, the shell and the partition plate can be filled with heparin water and used for soaking the preset conduit; the end part of the shell is provided with an opening matched with the preset catheter, the opening is provided with a plugging component sleeved outside the preset catheter, and the plugging component is of a split structure.

8. A central venipuncture instrument as claimed in any one of claims 1 to 7, wherein: two openings for penetrating through the internal pipeline are correspondingly arranged on the needle head at the tail end of the puncture part of the puncture needle.