Trocar

Abstract

The utility model relates to the technical field of medical instruments, in particular to a trocar which comprises a puncture needle assembly, a trocar assembly, a branch pipe fitting, a connector and a clamping piece, the branch pipe fitting comprises a connecting part and a hose part which are communicated with each other, one end of the hose part is fixedly connected to the outer wall of the connecting part, and one end of the connecting part is rotationally arranged at the other end of a catheter; the other end of the connecting part is rotationally arranged on the connector, the connector, the connecting part, the catheter and the soft needle tube form a through pipeline, the puncture needle can be inserted into or pulled out of the pipeline through the connector, and the clamping piece is arranged on the soft tube part and used for blocking or conducting a pipeline of the soft tube part. According to the trocar, the branch pipe fitting is communicated with the catheter, and the connecting part of the branch pipe fitting is rotationally arranged on the catheter, so that the trocar can be conveniently used by a patient needing to puncture on the left side and the right side, and a hose is prevented from being bent.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a trocar. Background Art

[0002] A trocar consists of a stainless steel core needle, a soft cannula, an outer catheter, and a needle hub. During puncture, the soft cannula and core needle are inserted into the blood vessel together. After successful puncture, the core needle is withdrawn, leaving only the soft cannula in the vessel. The soft cannula prevents the vessel from being punctured by even the slightest movement, thus reducing drug leakage, unnecessary punctures, and pain for the patient, as well as damage to the blood vessels. It is widely used in clinical practice today.

[0003] However, the outer tube of the trocar is open and lacks a hemostatic clamp. When the tail end of the trocar is connected to other pipelines, blood flow can only be blocked by folding the hose back or clamping the soft cannula with a hemostatic clamp, which can easily cause blood loss and pose a safety hazard to the patient. There is a type of trocar in the prior art that directly connects a branch hose to the outer tube, which is then connected to other pipelines, creating a space for installing a clamping structure. However, the branch hose is fixed to the outer tube, which is extremely inconvenient for patients requiring puncture on both sides and may cause the branch hose to bend. Utility Model Content

[0004] The utility model aims to provide a trocar, which is convenient for patients undergoing left and right punctures and avoids bending of branch hoses.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] Trocar, including:

[0007] The puncture needle assembly comprises a needle seat and a puncture needle, wherein the puncture needle is arranged on the needle seat;

[0008] The trocar assembly comprises a soft needle tube and a catheter, wherein the soft needle tube is fixedly connected to one end of the catheter;

[0009] The branch pipe comprises a connecting portion and a hose portion that are interconnected, wherein one end of the hose portion is fixedly connected to the outer wall of the connecting portion, and one end of the connecting portion is rotatably disposed on the other end of the conduit;

[0010] A connector, wherein the other end of the connecting portion is rotatably disposed on the connector, and the connector, the connecting portion, the catheter, and the soft needle tube form a through-channel. The puncture needle can be inserted into or removed from the channel through the connector. When the puncture needle is inserted into the channel, the needle tip of the puncture needle is located outside the soft needle tube. When the puncture needle is removed from the channel, the connector seals the channel.

[0011] The clamping piece is arranged on the hose portion and is used to block or open the pipeline of the hose portion.

[0012] Furthermore, the connecting part includes a first connecting part and a second connecting part, the two ends of the first connecting part are respectively rotatably arranged on the catheter and the connecting head, one end of the second connecting part is arranged on the first connecting part, and the other end of the second connecting part extends in a direction close to the connecting head, and the hose part is arranged at the other end of the second connecting part.

[0013] Furthermore, the clamping member includes a first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are arranged to form a clamping channel, the hose portion is passed through the clamping channel, and the first clamping arm and the second clamping arm can approach or move away from each other to block or open the pipeline of the hose portion.

[0014] Furthermore, a stop portion is provided at one end of the first clamping arm, and when the first clamping arm and the second clamping arm are close to each other, the second clamping arm abuts against the stop portion to connect the first clamping arm and the second clamping arm.

[0015] Furthermore, a through hole is provided on the peripheral wall of the soft needle tube away from one end of the catheter, and the through hole is connected to the pipeline of the soft needle tube.

[0016] Furthermore, the trocar further comprises a fixing wing, which is arranged on the catheter. The fixing wing has two winglets, and the two winglets are arranged on both sides of the catheter.

[0017] Furthermore, one side of each of the two wings is provided with double-sided medical tape.

[0018] Furthermore, the puncture needle assembly further includes a needle cap, and the needle tip of the puncture needle is inserted into the needle cap.

[0019] Furthermore, the trocar further comprises a hemostatic plug, which is inserted into an end of the needle seat away from the puncture needle.

[0020] Furthermore, a transparent portion is provided on the needle seat, and the transparent portion is used to observe the blood return status after puncture.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a trocar, wherein a branch pipe is provided on the catheter of the trocar, and a connecting portion of the branch pipe is rotatably provided on the catheter. When the trocar is used by a patient requiring puncture on both the left and right sides, the connecting portion can be directly rotated to drive the flexible tube portion to rotate to the side convenient for the operator, and then the flexible tube portion is connected to the external pipeline to treat the patient. This arrangement facilitates the use of patients requiring puncture on both sides and avoids bending of the flexible tube. Furthermore, the flexible tube portion of the branch pipe is connected to the external pipeline, and a clamping member can be directly installed on the flexible tube portion, thereby quickly connecting and blocking the flexible tube portion with the external pipeline, avoiding the need to fold the flexible tube portion or clamp it with hemostatic forceps, and making it more convenient to operate during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a trocar provided in an embodiment of the present utility model;

[0024] Figure 2 This is a structural diagram of a trocar provided by an embodiment of the present utility model without the puncture needle assembly;

[0025] Figure 3 This is a schematic structural diagram of a clamping member provided by an embodiment of the present utility model;

[0026] Figure 4 It is a structural schematic diagram of the puncture needle assembly provided by an embodiment of the utility model.

[0027] In the picture:

[0028] 1. Puncture needle assembly; 11. Needle seat; 12. Puncture needle; 13. Needle cap; 2. Trocar assembly; 21. Soft needle tube; 211. Through hole; 22. Catheter; 3. Branch pipe; 31. Connecting part; 311. First connecting part; 312. Second connecting part; 32. Hose part; 4. Connector; 5. Clamping part; 51. First clamping arm; 511. Stopper; 52. Second clamping arm; 6. Fixed wing; 61. Wing; 7. Hemostatic plug. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0033] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] The utility model provides a trocar, which includes a puncture needle assembly 1, a trocar assembly 2, a branch pipe 3, a connector 4 and a clamping member 5. The puncture needle assembly 1 includes a needle seat 11 and a puncture needle 12, and the puncture needle 12 is arranged on the needle seat 11; the trocar assembly 2 includes a soft needle tube 21 and a catheter 22, and the soft needle tube 21 is fixed to one end of the catheter 22; the branch pipe 3 includes a connecting portion 31 and a hose portion 32 that are interconnected, and one end of the hose portion 32 is fixed to the outer wall of the connecting portion 31, and the connecting portion 31 is fixed to the outer wall of the connecting portion 31. One end is rotatably mounted on the other end of the catheter 22; the other end of the connecting portion 31 is rotatably mounted on the connector 4. The connector 4, the connecting portion 31, the catheter 22, and the soft needle tube 21 form a continuous pipeline. The puncture needle 12 can be inserted into or removed from the pipeline via the connector 4. When the puncture needle 12 is inserted into the pipeline, the needle tip of the puncture needle 12 is located outside the soft needle tube 21. When the puncture needle 12 is removed from the pipeline, the connector 4 seals the pipeline. The clamping member 5 is mounted on the soft tube 32 to block or open the pipeline of the soft tube 32. The trocar is connected to the branch pipe 3 on the catheter 22, and the connecting portion 31 of the branch pipe 3 is rotatably mounted on the catheter 22, which facilitates use on patients requiring puncture on both sides and avoids bending of the soft tube. Furthermore, the external pipeline is connected through the hose portion 32 of the branch pipe 3, and the clamping part 5 can be directly installed on the hose portion 32, so as to quickly realize the conduction and blocking of the hose portion 32 and the external pipeline, avoiding the need to fold the hose portion 32 or clamp it with hemostatic forceps, and making it more convenient to operate during use.

[0037] Furthermore, the connector 4 can insert the puncture needle 12, and after a successful puncture, when the puncture needle 12 is pulled out of the connector 4, the connector 4 can automatically close the channel formed by the connector 4, the connecting portion 31, the catheter 22, and the soft needle tube 21 to prevent blood from flowing out. Optionally, the connector 4 adopts a Luer connector, which is a prior art and will not be described in detail here.

[0038] like Figure 2As shown, the connecting portion 31 includes a first connecting portion 311 and a second connecting portion 312. One end of the first connecting portion 311 is pivotally mounted on the catheter 22, and the other end is pivotally mounted on the connector 4. One end of the second connecting portion 312 is mounted on the first connecting portion 311, and the other end of the second connecting portion 312 extends toward the connector 4. That is, the first connecting portion 311 and the second connecting portion 312 are connected at an angle. This arrangement can reduce the resistance to liquid flow in the pipeline and facilitate liquid circulation in the pipeline. Preferably, the angle between the first connecting portion 311 and the second connecting portion 312 is less than or equal to 45°, which can further reduce the resistance to liquid flow in the pipeline. Furthermore, the hose portion 32 is connected to the other end of the second connecting portion 312. When a patient needs treatment, the hose portion 32 is connected to the external pipeline. The opening and closing of the hose portion 32 are controlled by the clamping member 5, reducing the operational risk when the trocar is connected to the external pipeline. The hose portion 32 can also be connected to a syringe to determine the puncture status of the blood vessel, thereby facilitating further treatment of the patient.

[0039] Furthermore, if Figure 3 As shown, the clamping member 5 includes a first clamping arm 51 and a second clamping arm 52. The first clamping arm 51 and the second clamping arm 52 enclose a clamping channel. The hose portion 32 is disposed in the clamping channel. The first clamping arm 51 and the second clamping arm 52 can move closer to and farther from each other. When the first clamping arm 51 and the second clamping arm 52 are closer, the hose portion 32 is blocked, preventing the patient's blood from flowing out when the trocar is separated from the external tubing. When the first clamping arm 51 and the second clamping arm 52 are farther apart, the hose portion 32 is opened, and treatment can be performed on the patient. Optionally, the first clamping arm 51 and the second clamping arm 52 are integrally formed, ensuring the structural stability of the clamping member 5 and facilitating its processing.

[0040] In this embodiment, a stop portion 511 is provided at one end of the first clamping arm 51. When the first clamping arm 51 and the second clamping arm 52 are close to each other, the second clamping arm 52 can abut against the stop portion 511, thereby connecting the first clamping arm 51 and the second clamping arm 52. During use, the operator can directly pinch the first clamping arm 51 and the second clamping arm 52 so that the second clamping arm 52 abuts against the stop portion 511, thereby blocking the hose portion 32.

[0041] When using the trocar for puncture, in order to enable rapid blood return, a through hole 211 is provided on the peripheral wall of the soft needle tube 21 at the end away from the catheter 22. The through hole 211 is connected to the pipeline of the soft needle tube 21, and blood can be quickly returned through the through hole 211, thereby improving the success rate of puncture. Preferably, three through holes 211 are provided to increase blood flow.

[0042] Furthermore, in this embodiment, the trocar is further provided with a fixing wing 6, which is provided on the catheter 22 and close to one end of the soft needle tube 21. The fixing wing 6 has two winglets 61, which are provided on both sides of the catheter 22. During puncture, the operator can hold the winglets 61 to facilitate operation, thereby improving the success rate of puncture. Moreover, after the puncture is completed, the trocar can also be fixed by the fixing winglets 6, thereby improving the stability of the trocar fixation. Optionally, double-sided medical tape is provided on one side of the two winglets 61. After puncture, the protective layer of the double-sided medical tape can be torn off to quickly and preliminarily fix the trocar to prevent the trocar from falling off.

[0043] like Figure 4 As shown, the puncture needle assembly 1 further includes a needle cap 13 , and the needle tip of the puncture needle 12 can be inserted into the needle cap 13 , so as to facilitate the recovery of the puncture needle assembly 1 and avoid being pricked by the needle tip.

[0044] Optionally, the trocar is further provided with a hemostatic plug 7, which is inserted into the end of the needle seat 11 away from the puncture needle 12. The hemostatic plug 7 can prevent blood from flowing out after puncture.

[0045] Optionally, a transparent portion is provided at one end of the needle holder 11, through which blood return after puncture can be observed to determine whether the puncture is successful.

[0046] The following is a detailed description of the puncture steps of the trocar provided by the embodiment of the present invention: before use, check the sealing of the outer packaging of the trocar and the expiration date, take out the product from the packaging and check the integrity of the equipment; select a suitable puncture point and disinfect the skin, hold the wing 61 with one hand, and puncture the target blood vessel with the needle tip of the puncture needle 12 facing up; when blood flow is observed in the transparent part of the needle seat 11, it means that the puncture of the puncture needle 12 is successful, and the needle tip is pushed forward again to ensure that the soft needle tube 21 enters the blood vessel, and then the remaining part of the soft needle tube 21 is continued to be pushed into the blood vessel until the interface between the soft needle tube 21 and the catheter 22, and the puncture needle 12 is properly retracted into the soft needle tube 21; after the puncture is completed, the protective layer of the double-sided medical tape on the wing 61 is torn off, and the trocar is fixed to the patient's skin by the fixing wing 6; then the puncture needle 12 is pulled out, and the puncture needle 12 is inserted into the needle cap 13, and disposed of according to the principles of medical waste disposal; the soft needle tube 21 is retained in the blood vessel, and the fixing wing 6 of the trocar is further fixed. The connecting portion 31 of the trocar is rotated to connect the flexible tube portion 32 to the external pipeline to perform the next operation on the patient, which is convenient to use and avoids bending of the flexible tube portion 32. The trocar can reduce the pain of repeated punctures for the patient by leaving the soft needle tube 21 in the blood vessel, is conducive to protecting the patient's blood vessels, and avoids swelling caused by the puncture needle 12.

[0047] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Trocar, characterized in that include: A puncture needle assembly (1) comprises a needle seat (11) and a puncture needle (12), wherein the puncture needle (12) is arranged on the needle seat (11); A trocar assembly (2) comprises a soft needle tube (21) and a catheter (22), wherein the soft needle tube (21) is fixedly connected to one end of the catheter (22); A branch pipe (3) comprises a connecting portion (31) and a hose portion (32) that are interconnected, one end of the hose portion (32) being fixed to the outer wall of the connecting portion (31), and one end of the connecting portion (31) being rotatably disposed on the other end of the conduit (22); A connector (4), wherein the other end of the connecting portion (31) is rotatably arranged on the connector (4), the connector (4), the connecting portion (31), the catheter (22) and the soft needle tube (21) form a through-channel, and the puncture needle (12) can be inserted into or pulled out of the channel through the connector (4); when the puncture needle (12) is inserted into the channel, the needle tip of the puncture needle (12) is located outside the soft needle tube (21); when the puncture needle (12) is pulled out of the channel, the connector (4) closes the channel; The clamping member (5) is arranged on the hose portion (32) and is used to block or open the pipeline of the hose portion (32).

2. The trocar according to claim 1, characterized in that: The connecting portion (31) comprises a first connecting portion (311) and a second connecting portion (312), wherein the two ends of the first connecting portion (311) are rotatably arranged on the conduit (22) and the connecting head (4), respectively; one end of the second connecting portion (312) is arranged on the first connecting portion (311), and the other end of the second connecting portion (312) extends in a direction close to the connecting head (4); the second connecting portion (312) and the first connecting portion (311) are arranged at an angle, and the hose portion (32) is arranged at the other end of the second connecting portion (312).

3. The trocar according to claim 1, characterized in that: The clamping member (5) comprises a first clamping arm (51) and a second clamping arm (52), wherein the first clamping arm (51) and the second clamping arm (52) are arranged to form a clamping channel, and the hose portion (32) is passed through the clamping channel. The first clamping arm (51) and the second clamping arm (52) can approach or move away from each other, so that the pipeline of the hose portion (32) is blocked or opened.

4. The trocar according to claim 3, characterized in that: A stop portion (511) is provided at one end of the first clamping arm (51); when the first clamping arm (51) and the second clamping arm (52) are close to each other, the second clamping arm (52) abuts against the stop portion (511), so that the first clamping arm (51) and the second clamping arm (52) are connected.

5. The trocar according to claim 1, characterized in that: A through hole (211) is provided on the peripheral wall of the soft needle tube (21) at one end away from the catheter (22), and the through hole (211) is communicated with the pipeline of the soft needle tube (21).

6. The trocar according to claim 1, characterized in that: The trocar further comprises a fixed wing (6), which is arranged on the catheter (22). The fixed wing (6) has two winglets (61), and the two winglets (61) are arranged on both sides of the catheter (22).

7. The trocar according to claim 6, characterized in that: One side of the two wings (61) is provided with double-sided medical adhesive tape.

8. The trocar according to any one of claims 1 to 7, characterized in that: The puncture needle assembly (1) further comprises a needle cap (13), and the needle tip of the puncture needle (12) is inserted into the needle cap (13).

9. The trocar according to any one of claims 1 to 7, characterized in that: The trocar further comprises a hemostatic plug (7), which is inserted into an end of the needle seat (11) away from the puncture needle (12).

10. The trocar according to any one of claims 1 to 7, characterized in that: The needle seat (11) is provided with a transparent portion, and the transparent portion is used to observe the blood return state after puncture.

Images