CN209751900U - Guide wire and guide wire assembly - Google Patents

Abstract

The utility model relates to a guide wire and a guide wire assembly. The technical solution is: including the guide wire body, the guide wire body includes a spring tube and a support inner core placed in the spring tube, both ends of the support inner core are fixedly connected with the spring tube, and the support inner core is a tube with a central cavity. Hollow tubular, the tail end of the guide wire body is fitted with a connector for syringe connection. The operator can withdraw the guide wire remaining in the patient's body through the connector and connect the syringe. If there is blood drawn back, it can be determined that the guide wire is in the deep vein. If no blood is withdrawn, it can be judged that the guide wire is not in the deep vein, so as to realize the accurate judgment of the accurate placement of the guide wire in the vein, thereby avoiding blind placement of dilators and catheters, and achieving the purpose of reducing damage.

Description

Guidewires and Guidewire Components

technical field

The utility model relates to a medical device, in particular to a guide wire and a guide wire assembly used in deep vein puncture catheterization.

Background technique

Deep venous catheterization is an essential technique for establishing venous access in critically ill patients. The purpose is to: ① understand the comprehensive situation of effective blood volume, cardiac function and peripheral circulation resistance.

② Identify acute circulatory failure of unknown cause.

③ When a large amount of blood transfusion and fluid replacement are required, it can be used to observe the dynamic changes of blood volume and the danger of circulatory overload.

④ It can be used as a way of massive blood transfusion and fluid replacement for critically ill patients, major operations and emergency situations.

Take internal jugular vein puncture as an example. During the operation, the patient should lie supine, remove the pillow and head up, turn the head to the opposite side, if necessary, raise the back of the shoulders, and lower the head by 15-30°. Routine disinfection, sterile hole towels, and local anesthesia at the puncture point. Try it on with a regular needle first. After confirming the position, perform the puncture, point with the index finger of the left hand, and hold the puncture needle in the right hand, and draw back while inserting the needle. After seeing venous blood, fix the needle, insert a length-marked non-damaging guide wire, and pull out the puncture needle together with the syringe. The dilator is used to dilate the skin, and the guide wire is inserted into the catheter, and the length of indwelling is about 10-15cm. Withdraw the guide wire, draw back the catheter to see blood, rinse with heparin saline, connect the heparin cap, and fix it with a sterile dressing.

During the process of "inserting a non-traumatic guide wire with length markers", the guide wire may not be placed in the deep vein, but placed in the surrounding tissue, which is not easy for the operator to detect. After the operator gives the "dilator to expand the skin, insert the catheter through the guide wire", the operator will find it difficult to "insert the catheter through the guide wire", or after "inserting the catheter through the guide wire", the operator will find that the catheter is withdrawn In the absence of blood, it was determined that the catheter was unsuccessfully placed in the deep vein. Then remove the catheter and re-puncture the catheter. This will cause unnecessary injury to the patient.

Contents of the invention

Purpose of the invention of the utility model: In order to overcome the defects of the prior art, the utility model provides a guide wire that can determine the condition of deep vein insertion.

In order to achieve the above object, the utility model provides the following technical solutions:

A guide wire, including a guide wire body, the guide wire body includes a spring tube and a support inner core placed in the spring tube, the two ends of the support inner core are fixedly connected with the spring tube, and it is characterized in that: the support inner core is Hollow tubular with a central cavity.

By adopting the above technical solution, the support inner core of the guide wire adopts a hollow tubular design, so that the guide wire has a central cavity, and the operator can withdraw the guide wire temporarily in the patient's body through the connector and connect the syringe. If there is blood drawn back, it can be determined that the guide wire is in the deep vein. If no blood is withdrawn, it can be determined that the guide wire is not in the deep vein, thereby avoiding the insertion of dilators and catheters, and achieving the purpose of reducing damage.

Preferably, the front end of the guide wire body is in the shape of a hook. This structural design makes it difficult for the guide wire to damage blood vessels during puncture.

The utility model also provides a guide wire assembly capable of judging the situation of deep vein insertion, including a guide wire body, the guide wire body includes a spring tube and a support inner core placed in the spring tube, and the two ends of the support inner core are connected to the spring tube Fixed connection, characterized in that: the supporting inner core is a hollow tube with a central cavity, and the tail end of the guide wire body is fitted with a connector for the syringe to connect to. Under this structural design, the support inner core of the guide wire adopts a hollow tubular design, so that the guide wire has a central cavity, and the operator can withdraw the guide wire temporarily in the patient's body through the connector and connect the syringe. If there is blood drawn back, it can be determined that the guide wire is in the deep vein. If no blood is withdrawn, it can be determined that the guide wire is not in the deep vein, thereby avoiding the insertion of dilators and catheters, and achieving the purpose of reducing damage.

Below in conjunction with accompanying drawing, the utility model is further described.

Description of drawings

Fig. 1 is the structural representation of guidewire assembly of specific embodiment of the present utility model;

Fig. 2 is an exploded view of a connector of a specific embodiment of the present invention;

Fig. 3 is a structural schematic diagram of a connector of a specific embodiment of the present invention.

Detailed ways

Referring to accompanying drawing 1, a kind of guide wire disclosed by the utility model comprises a guide wire body 1, and the guide wire body 1 includes a spring tube 11 and a supporting inner core 12 placed in the spring tube 11, and the two ends of the supporting inner core 12 are It is fixedly connected with the spring tube 11 , and the support inner core 12 is a hollow tube with a central cavity 121 . The supporting inner core and the spring tube can be fixed by traditional welding connection, and the welding place is guaranteed to be smooth and not block the port of the central cavity.

The front end of the guide wire body 1 is hook-shaped, such as the U-shaped hook-shaped front part 1-1 as shown in the figure.

As shown in FIGS. 1-3 , the tail end of the guide wire body 1 is fitted with a connector 2 for connecting a syringe. The connector 2 is detachably matched with the tail of the guide wire body 1 . In this way, the operation of the guide wire can avoid the influence of the connector. Of course, the guide wire can also be designed with a fixedly connected connector.

In this specific embodiment, the connector 2 includes a fixing tube 21, a locking rubber column 22 and a locking cap 23. The fixing tube 21 is provided with an installation cavity 210, and one end of the installation cavity 210 of the fixing tube 21 has a bottom 211. The bottom 211 is provided with a guide wire insertion hole 212 for the guide wire body 1 to penetrate, and the outer wall of the other end of the fixed tube 21 is provided with a connecting external thread 213, and the locking rubber column 22 is placed in the installation cavity 210 of the fixed tube 21 Inside, the locking rubber column 22 has a locking hole 221 corresponding to the guide wire insertion hole 212 on the bottom 211 for the guide wire body 1 to pass through, and the locking cap 23 includes a screwed nut body 231 , the screw nut body 231 is screwed with the connecting external thread 213, the screw nut body 231 is coaxially provided with a central column 232, and the center of the central column 232 has a guide wire positioning hole 233 for inserting the guide wire body 1 A connector 234 is coaxially extended outside the screw nut body 231, the inner cavity of the connector 234 is coaxially communicated with the guide wire positioning hole 233, and the end of the guide wire positioning hole 233 has a stepped surface 2331 for the end of the guide wire body 1 Position limit, the central column 232 is screwed on the connecting external thread 213 with the screw nut body 231 and inserted into the installation cavity 210 of the fixed pipe 21, and the central column 232 is screwed into the connecting external thread with the screw nut body 231 213 to press the locking rubber column 22 on the bottom 211 to deform and form the locking rubber column 22 to clamp the locking guide wire body 1 . During operation, pass the guide wire body through the guide wire insertion hole, the locking hole of the locking rubber column, and the guide wire positioning hole of the center column in sequence, and then screw the nut body and screw it on the connecting external thread of the fixed tube. With the tightening of the screw nut body, the central column presses the locking rubber column against the bottom of the installation cavity of the fixed tube and makes the locking rubber column elastically deform, and the locking hole is squeezed and deformed to clamp the locking guide wire The main body, so that the connector is fixedly connected with the guide wire body, the structure is simple, and the connection and assembly of the connector and the guide wire body are simple and convenient.

The bottom 211 is a conical shape that protrudes toward the installation cavity 210, and the guide wire insertion hole 212 is located at the top of the cone. Start 211-2. The tapered cavity is convenient for the guide wire body to be inserted into the guide wire insertion hole, and the tapered convex surface is convenient for locking the deformation of the rubber column.

Further, an arc-shaped ring-shaped protrusion 235 is provided on the outer peripheral surface of the starting position where the central column 232 is inserted into the installation cavity 210, and a ring-shaped protrusion 235 is provided in the port of the installation cavity 210 opposite to the bottom 211. Shaped anti-off convex edge 215, the cross-section shape of anti-off convex edge 215 is arc-shaped, and the ring-shaped protrusion 235 is matched with the stopper of anti-off convex edge 215. The mouth of the screw nut body 231 has an empty sleeve The connection external thread 213 of the fixed pipe 21 constitutes a relief opening 2311 where the internal thread of the nut body 231 is disengaged from the connection external thread 213. The protrusion 235 is located at a stop position cooperating with the anti-off convex edge 215 stop. After the internal thread of the screw-on nut body is disengaged from the external thread, the relief port of the screw-on nut body cooperates with the fixing pipe, and with the cooperation of the annular protrusion and the anti-off convex edge, the screw-on nut body is fixed in place. The tube is idling to prevent the locking cap from rotating out of the fixed tube, making the connector more convenient to use.

Holding fins 214 protrude from the outer wall of the fixing tube 21 . The fixing tube is provided with a holding part for hand-held operation of the fixing tube, which facilitates the operation of the connector.

Claims (8)

1. The utility model provides a seal wire, includes the seal wire body, the seal wire body includes the spring pipe and arranges the intraductal support inner core of spring in, support inner core both ends and spring pipe fixed connection, its characterized in that: the supporting inner core is in a hollow tubular shape with a central pore cavity.

2. The guidewire of claim 1, wherein: the front end of the guide wire body is in a hook shape.

3. The utility model provides a seal wire assembly, includes the seal wire body, the seal wire body includes the spring pipe and arranges the intraductal support inner core of spring in, support inner core both ends and spring pipe fixed connection, its characterized in that: the support inner core is a hollow tube with a central pore cavity, and the tail end of the guide wire body is matched with a connector for connecting an injector.

4. the guidewire assembly of claim 3, wherein: the connector is releasably engaged to the tail of the guidewire body.

5. The guidewire assembly of claim 4, wherein: the connector comprises a fixed pipe, a locking rubber column and a locking cap, wherein the fixed pipe is provided with an installation cavity, one end of the installation cavity of the fixed pipe is provided with a bottom, the bottom is provided with a guide wire insertion hole for a guide wire body to penetrate through, the outer side wall of the other end of the fixed pipe is provided with a connecting external thread, the locking rubber column is arranged in the installation cavity of the fixed pipe, the locking rubber column is provided with a locking hole which is correspondingly matched with the guide wire insertion hole on the bottom and is used for the guide wire body to penetrate through, the locking cap comprises a screwing nut body, the screwing nut body is in threaded screw fit with the connecting external thread, a central column is coaxially arranged in the screwing nut body, the center of the central column is provided with a guide wire positioning hole for the guide wire body to insert, a connector is coaxially extended outside the screwing nut body, the inner cavity of the connector is coaxially communicated with the guide, the central column is screwed in the connecting external thread along with the screwing screw cap body to extrude the locking rubber column on the bottom to deform so as to form a locking rubber column clamping locking guide wire body.

6. The guidewire assembly of claim 5, wherein: the bottom is a cone protruding towards the mounting cavity, the guide wire placing hole is located at the top end of the cone, the outer side of the bottom correspondingly forms a cone-shaped cavity, and the inner side of the bottom correspondingly forms a cone-shaped protruding surface.

7. The guidewire assembly of claim 5, wherein: the outer periphery that the center post inserted the top position in the installation cavity is equipped with convex annular arch, the installation cavity with be equipped with annular anticreep protruding edge in the relative port in end, the anticreep is protruding along cross sectional shape and is arc, and annular arch and the protruding backstop cooperation of following of anticreep, the oral area that connects the spiral shell body soon has the internal thread that the empty cover constitutes the spiral shell body in the connection external screw thread department of fixed pipe and the position mouth that lets that connects the external screw thread and throw off, annular arch is located and the protruding backstop position along the backstop complex of anticreep when letting the position mouth empty cover on connecting the external screw thread.

8. The guidewire assembly of claim 5, wherein: and a holding wing is convexly arranged on the outer wall of the fixed pipe.