Central venous catheter assembly

Abstract

The utility model discloses a central venous catheter assembly which comprises a central venous catheter main body, the central venous catheter main body comprises a trocar, a main catheter is arranged in the trocar, a puncture needle is arranged in the main catheter, an air alarm is arranged at the tail end of the trocar, and the air alarm is connected with the trocar. A connecting base is arranged at the end part of the main guide pipe; by designing a stable control deviation rectifying mechanism, an elastic clamping ball can deform to elastically clamp the elastic clamping ball into a clamping hole so as to fixedly mount a mounting ring and an arc-shaped plate, when a main catheter penetrates into a trocar, the elastic ring deforms to drive the arc-shaped plate to be elastically connected, a ball elastically makes contact with the outer surface of the main catheter, and therefore the main catheter is fixedly mounted. The main catheter is located in the trocar to drive the ball to roll in the rolling groove, penetration is stably controlled, and the possibility of danger or severe pain caused by deviation is low during penetration, so that the deviation correction control effect of the central venous catheter main body during use is improved, and the central venous catheter main body smoothly punctures and enters.

Description

TECHNICAL FIELD

[0001] The utility model belongs to central venous catheter technical field, concretely relates to a central venvenous catheter assembly. BACKGROUND

[0002] The existing central venous catheter is a commonly used medical equipment, which can help doctors to place the catheter end in the superior vena cava or inferior vena cava, so as to perform various medical operations, and is usually used for patients who need long-term venous access, such as patients who need infusion, intravenous nutrition, drug treatment or monitoring of central venous pressure, and is easy to conveniently and quickly penetrate into stable control sealing installation when in use, and is not easy to deviate when penetrating, thereby improving the deviation correction control effect of the central venous catheter when in use, smoothly penetrating, and improving the puncture success rate.

[0003] The existing central venous catheter is first punctured by a puncture needle into the inside of a venous blood vessel, then a guide wire is inserted into the inside of the puncture needle to enter the venous blood vessel, then a trocar is sleeved on the outer surface of the guide wire, and the guide wire is pulled out to make the venous catheter enter the venous blood vessel, so that the diameter of the catheter is smaller than the diameter of the inside of the trocar, the catheter is easy to shake and deviate when penetrating into the inside of the trocar, it is not convenient to stably control the catheter to enter, and even when slight deviation occurs, danger or severe pain may be caused, thereby affecting the deviation correction control effect of the central venous catheter when in use. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a central venous catheter assembly to solve the problem that the diameter of the catheter is smaller than the diameter of the inside of the trocar, the catheter is easy to shake and deviate when penetrating into the inside of the trocar, it is not convenient to stably control the catheter to enter, and even when slight deviation occurs, danger or severe pain may be caused, thereby affecting the deviation correction control effect of the central venous catheter when in use.

[0005] To achieve the above object, the utility model provides the following technical scheme: a central venous catheter assembly, comprising a central venous catheter main body, the central venous catheter main body includes a trocar, the inside of the trocar is provided with a main catheter, the inside of the main catheter is provided with a puncture needle, the tail end of the trocar is provided with an air alarm, the end of the main catheter is provided with a connecting base, the end upper surface of the connecting base is sequentially provided with a pressure sensor and a switch valve, the tail end of the main catheter is provided with a one-way valve, and the central venous catheter main body is further provided with:

[0006] The stable control deviation rectifying mechanism comprises an elastic connecting assembly arranged on the inner surface of the trocar, an outer surface of the elastic connecting assembly is provided with a clamping mounting assembly, and an inner surface of the elastic connecting assembly is provided with a rolling assembly.

[0007] The sealing connecting mechanism comprises a fixed connecting assembly arranged on the outer surface of the tail end of the main conduit, and an outer surface of the fixed connecting assembly is provided with a sealing assembly.

[0008] Preferably, the elastic connecting assembly comprises a mounting ring arranged at the edges of the two ends of the inner part of the trocar, an inner surface of the mounting ring is provided with an elastic ring, and an inner surface of the elastic ring is elastically connected with three arc-shaped plates.

[0009] Preferably, the outer surface of the arc-shaped plate is matched with the structure of the inner surface of the elastic ring, and the arc-shaped plate and the inner surface of the mounting ring are elastically connected through the elastic ring.

[0010] Preferably, the clamping mounting assembly comprises an elastic clamping ball integrally formed on the outer surface of the mounting ring, and the two ends of the inner surface of the trocar are provided with clamping holes, and the elastic clamping ball is clamped and connected with the inner part of the clamping hole.

[0011] Preferably, the rolling assembly comprises five rolling grooves arranged at the edges of the inner surface of the arc-shaped plate, and the inner part of the rolling groove is rolled with a ball, and the surface of the ball is in contact with the surface of the main conduit.

[0012] Preferably, the fixed connecting assembly comprises an outer thread ring integrally formed at the tail end of the main conduit, and the outer thread ring is in a ring structure.

[0013] Preferably, the sealing assembly comprises a flexible inner thread ring rotatably connected with the outer surface of the outer thread ring, and the outer surface of the flexible inner thread ring is integrally formed with a sealing ring.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] Through the design of the stable control deviation rectifying mechanism, the elastic clamping ball is elastically clamped in the inner part of the clamping hole when the elastic clamping ball is deformed, the mounting ring and the arc-shaped plate are fixedly mounted, the arc-shaped plate is elastically connected under the action of the deformed elastic ring when the main conduit is inserted into the inner part of the trocar, the ball is elastically contacted with the outer surface of the main conduit, the ball is rolled in the inner part of the rolling groove under the action of the main conduit inserted into the inner part of the trocar, the insertion is stably controlled, and the deviation is not easy to occur during the insertion, so that the danger or the severe pain is not easy to occur, and the deviation rectifying control effect of the central venous catheter main body during use is improved, and the smooth puncture is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the utility model.

[0017] Figure 2 The partial section structure schematic view of the trocar, the main catheter and the puncture needle of the utility model;

[0018] Figure 3 The partial section structure schematic view of the trocar and the main catheter of the utility model;

[0019] Figure 4 The utility model Figure 3 The enlarged structure schematic view of part B;

[0020] Figure 5 The overhead structure schematic view of the trocar, the main catheter and the arc plate of the utility model;

[0021] Figure 6 The utility model Figure 1 The enlarged structure schematic view of part A;

[0022] Figure 7 The open state structure schematic view of the main catheter, the outer thread ring and the sealing ring of the utility model;

[0023] In the drawing: 100, central venous catheter main body;101, trocar;1011, installation ring;1012, elastic ring;1013, arc plate;1014, card hole;1015, elastic ball;1016, ball;1017, rolling groove;102, main catheter;1021, outer thread ring;1022, flexible inner thread ring;1023, sealing ring;103, puncture needle;104, air alarm;105, connecting base;106, one-way valve;107, pressure sensor;108, switch valve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figures 1 to 7The utility model provides a technical scheme: a central venous catheter assembly, including central venous catheter main part 100, central venous catheter main part 100 includes trocar 101, the inside of trocar 101 is provided with main catheter 102, the inside of main catheter 102 is provided with puncture needle 103, after puncture needle 103 puncture, the guide wire is penetrated in the inside of puncture needle 103 and enters the inside of venous blood vessel, after the guide wire enters, pull out puncture needle 103, and again trocar 101 is on the outside surface of guide wire and slides, until again enter the inside of venous blood vessel of trocar 101, after the installation of trocar 101, pull out the guide wire again, the inside of main catheter 102 is penetrated in the inside of trocar 101 and extends into the inside of venous blood vessel, after the installation of main catheter 102, pull out trocar 101 again, the tail end of trocar 101 is provided with air alarm 104, the end of main catheter 102 is provided with connecting base 105, the end upper surface of connecting base 105 is sequentially provided with pressure sensor 107 and switch valve 108, the tail end of main catheter 102 is provided with check valve 106, when installing, the pressure discrimination of pressure sensor 107 during installation distinguishes artery and vein, and air alarm 104 occurs alarm when inserting air, and when central venous catheter main part 100 is installed and is used, through switch valve 108, main catheter 102 enters the injection use, open check valve 106 to facilitate one-way injection, prevent backflow, effectively distinguish venous pressure, improve puncture success rate, solve air embolism when puncture and place the guide wire and the input of air in infusion, central venous catheter main part 100 still is provided with:

[0026] Stable control deviation rectification mechanism, and the stable control deviation rectification mechanism includes the elastic connecting assembly arranged on the inner surface of the trocar 101, the outer surface of the elastic connecting assembly is provided with the clamping mounting assembly, the inner surface of the elastic connecting assembly is provided with the rolling assembly, when the main catheter 102 is penetrated in the inside of the trocar 101, the main catheter 102 is stably penetrated by the stable control deviation rectification mechanism, and deviation is not easy to occur when penetrating, which can produce danger or intense pain, thereby improving the deviation rectification control effect of the central venous catheter main part 100 when using, and smoothly penetrating.

[0027] In order to make the outer surface of the ball 1016 contact the outer surface of the main catheter 102 by the elastic connecting assembly for the elasticity of the arc-shaped plate 1013 and the ball 1016, and smoothly control deviation penetration, in the embodiment, preferably, the elastic connecting assembly includes the mounting ring 1011 arranged at the two end edges in the inside of the trocar 101, the inner surface of the mounting ring 1011 is provided with the elastic ring 1012, the inner surface of the elastic ring 1012 is elastically connected with three arc-shaped plates 1013, after fixing and installing the mounting ring 1011, the arc-shaped plate 1013 is elastically connected by the deformation of the elastic ring 1012, until the arc-shaped plate 1013 elastically connects and drives the ball 1016 to contact the surface of the main catheter 102.

[0028] In order to facilitate the installation of the installation ring 1011 and the arc-shaped plate 1013 by the snap-fit installation assembly, facilitate the installation in the stable control deviation, in the embodiment, preferably, the snap-fit installation assembly includes an elastic snap ball 1015 integrally formed on the outer surface of the installation ring 1011, the two ends of the sleeve needle 101 are provided with snap holes 1014 on the inner surface edge, the elastic snap ball 1015 is connected with the inside of the snap hole 1014, when the installation ring 1011 is closed on the inner surface of the sleeve needle 101, the elastic snap ball 1015 is elastically snapped in the inside of the snap hole 1014 by the deformation of the elastic snap ball 1015, and the installation ring 1011 is fixedly installed with the arc-shaped plate 1013.

[0029] In order to facilitate the installation of the installation ring 1011 and the arc-shaped plate 1013 by the snap-fit installation assembly, facilitate the installation in the stable control deviation, in the embodiment, preferably, the snap-fit installation assembly includes an elastic snap ball 1015 integrally formed on the outer surface of the installation ring 1011, the two ends of the sleeve needle 101 are provided with snap holes 1014 on the inner surface edge, the elastic snap ball 1015 is connected with the inside of the snap hole 1014, when the installation ring 1011 is closed on the inner surface of the sleeve needle 101, the elastic snap ball 1015 is elastically snapped in the inside of the snap hole 1014 by the deformation of the elastic snap ball 1015, and the installation ring 1011 is fixedly installed with the arc-shaped plate 1013.

[0030] The sealing connection mechanism includes a fixed connection assembly arranged on the outer surface of the tail end of the main conduit 102, and the outer surface of the fixed connection assembly is provided with a sealing assembly. After the central venous catheter body 100 is installed, when the sleeve needle 101 is removed, the end of the main conduit 102 is sealed and installed by the sealing connection mechanism when entering the puncture port, the sealing property of the central venous catheter body 100 when the main conduit 102 is closed at the entrance of the vein blood vessel is improved, and blood return is not easy.

[0031] In order to facilitate the installation of the installation ring 1011 and the arc-shaped plate 1013 by the snap-fit installation assembly, facilitate the installation in the stable control deviation, in the embodiment, preferably, the snap-fit installation assembly includes an elastic snap ball 1015 integrally formed on the outer surface of the installation ring 1011, the two ends of the sleeve needle 101 are provided with snap holes 1014 on the inner surface edge, the elastic snap ball 1015 is connected with the inside of the snap hole 1014, when the installation ring 1011 is closed on the inner surface of the sleeve needle 101, the elastic snap ball 1015 is elastically snapped in the inside of the snap hole 1014 by the deformation of the elastic snap ball 1015, and the installation ring 1011 is fixedly installed with the arc-shaped plate 1013.

[0032] In order to facilitate the sealing connection of the puncture port on the outer surface of the main conduit 102 through the sealing assembly after the main conduit 102 is penetrated, preferably, the sealing assembly comprises a flexible internal threaded ring 1022 rotatably connected to the outer surface of the external threaded ring 1021, and the outer surface of the flexible internal threaded ring 1022 is integrally formed with a sealing ring 1023. After the sealing ring 1023 is rotatably installed through the flexible internal threaded ring 1022, the trocar 101 is pulled out again, and the sealing ring 1023 is sealed and installed on the puncture port, which facilitates sealed installation and prevents backflow of blood.

[0033] The working principle and use process of the utility model are as follows: the central venous catheter assembly is used, first, the puncture needle 103 is used to puncture and enter the inside of the venous blood vessel of a patient, and after the puncture needle 103 is punctured, the guide wire is penetrated in the inside of the puncture needle 103 and enters the inside of the venous blood vessel, the puncture needle 103 is pulled out after the guide wire enters, and the trocar 101 is slid on the outer surface of the guide wire again until the trocar 101 enters the inside of the venous blood vessel again, the guide wire is pulled out again after the trocar 101 is installed, the main conduit 102 is penetrated in the inside of the trocar 101 and extends into the inside of the venous blood vessel, the main conduit 102 is installed, and the trocar 101 is pulled out again, when the main conduit 102 is installed, the pressure of the pressure sensor 107 during installation is used to distinguish the artery and the vein, and the air alarm 104 alarms when air enters, and when the central venous catheter body 100 is installed and used, the main conduit 102 is opened through the switch valve 108 to enter the medicine injection use, the one-way valve 106 is opened to facilitate one-way injection, backflow is prevented, the venous pressure is effectively distinguished, the puncture success rate is improved, and air embolism during puncture and air input during infusion are solved.

[0034] Then when the central venous catheter body 100 is installed and used, and the diameter of the main conduit 102 is greater than the external threaded ring 1021 and the connecting base 105, the trocar 101 is slid off the outer surface of the main conduit 102 and taken out, and after being taken out, the flexible internal threaded ring 1022 and the sealing ring 1023 are deformed to close the outer surface of the main conduit 102 through the outer surfaces of the connecting base 105 and the external threaded ring 1021, and the sealing ring 1023 is fixed and installed by rotating the outer surfaces of the flexible internal threaded ring 1022 and the external threaded ring 1021 again, after the trocar 101 is separated from the inside of the venous blood vessel, the outer surface of the sealing ring 1023 is tightly pressed on the inner surface of the inlet when continuing to enter the inside of the main conduit 102, which facilitates the sealing connection of the outer surface of the end of the main conduit 102 and the puncture port of the venous blood vessel through the sealing ring 1023, and backflow after insertion is not easy, thereby improving the sealing performance of the main conduit 102 at the puncture port of the venous blood vessel when the central venous catheter body 100 is used, and backflow is not easy.

[0035] Finally when the central venous catheter body 100 is installed and used, after the installation ring 1011 is closed at the inner two ends of the trocar 101, the elastic clamping ball 1015 is deformed to elastically clamp the elastic clamping ball 1015 in the inner part of the clamping hole 1014, and the installation ring 1011 is fixedly installed with the arc-shaped plate 1013, so that after the arc-shaped plate 1013 is installed, when the main catheter 102 is inserted into the inner part of the trocar 101, the arc-shaped plate 1013 is elastically connected by the deformed elastic ring 1012, until the ball 1016 is elastically contacted with the outer surface of the main catheter 102, the main catheter 102 is inserted into the inner part of the trocar 101 to drive the ball 1016 to roll in the rolling groove 1017, and the insertion process is stably controlled, and the insertion is not easy to deviate to cause danger or severe pain, so that the deviation control effect of the central venous catheter body 100 when used is improved, and smooth puncture is achieved.

[0036] Although the embodiments of the present application have been shown and described (see the detailed description above), it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A central venous catheter assembly, comprising a central venous catheter body (100), the central venous catheter body (100) comprising a trocar (101), the inside of the trocar (101) being provided with a main catheter (102), the inside of the main catheter (102) being provided with a puncture needle (103), the tail end of the trocar (101) being provided with an air alarm (104), the end of the main catheter (102) being provided with a connecting base (105), the end upper surface of the connecting base (105) being sequentially provided with a pressure sensor (107) and a switch valve (108), the tail end of the main catheter (102) being provided with a one-way valve (106), characterized in that: The central venous catheter body (100) is also provided with: A stable control deviation correction mechanism, and the stable control deviation correction mechanism comprises an elastic connecting assembly arranged on the inner surface of the trocar (101), the outer surface of the elastic connecting assembly is provided with a clamping mounting assembly, and the inner surface of the elastic connecting assembly is provided with a rolling assembly; A sealing connection mechanism, and the sealing connection mechanism comprises a fixed connecting assembly arranged on the outer surface of the tail end of the main catheter (102), and the outer surface of the fixed connecting assembly is provided with a sealing assembly.

2. A central venous catheter assembly according to claim 1, wherein: The elastic connecting assembly comprises a mounting ring (1011) arranged at the two end edges in the interior of the trocar (101), the inner surface of the mounting ring (1011) is provided with an elastic ring (1012), and the inner surface of the elastic ring (1012) is elastically connected with three arc-shaped plates (1013).

3. A central venous catheter assembly according to claim 2, wherein: The outer surface of the arc-shaped plate (1013) is matched with the inner surface structure of the elastic ring (1012), and the arc-shaped plate (1013) and the inner surface of the mounting ring (1011) are elastically connected through the elastic ring (1012).

4. The central venous catheter assembly of claim 2, wherein: The clamping mounting assembly comprises an elastic clamping ball (1015) integrally formed on the outer surface of the mounting ring (1011), the inner surface edges of the two ends of the trocar (101) are provided with clamping holes (1014), and the elastic clamping ball (1015) is clamped and connected with the inside of the clamping hole (1014).

5. The central venous catheter assembly of claim 2, wherein: The rolling assembly comprises five rolling grooves (1017) arranged at the inner surface edges of the arc-shaped plates (1013), the inside of the rolling groove (1017) is rolled with a rolling ball (1016), and the surface of the rolling ball (1016) is in contact with the surface of the main catheter (102).

6. The central venous catheter assembly of claim 1, wherein: The fixed connecting assembly comprises an outer thread ring (1021) integrally formed at the tail end of the main catheter (102), and the outer thread ring (1021) is in a ring structure.

7. A central venous catheter assembly according to claim 6, wherein: The sealing assembly comprises a flexible inner thread ring (1022) rotatably connected to the outer surface of the outer thread ring (1021), and the outer surface of the flexible inner thread ring (1022) is integrally formed with a sealing ring (1023).

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