CN202554636U - Punch-proof and blood return prevention indwelling needle - Google Patents

Abstract

The utility model provides a punch-proof and blood return prevention indwelling needle. The indwelling needle comprises a puncture steel needle assembly and an indwelling catheter assembly, wherein a check valve for preventing blood from flowing out is arranged in the indwelling catheter assembly; the puncture steel needle assembly is connected with a recycle driving device, and a recycle cylinder for recycling the puncture steel needle assembly is arranged at the rear end of the puncture steel needle assembly; and under driving of the recycle driving device, the puncture steel needle assembly returns back to the recycle cylinder. According to the punch-proof and blood return prevention indwelling needle, in a normal process of withdrawing a puncture steel needle, the check valve is used for blocking blood in the catheter base so as to prevent blood from overflowing and causing pollution, meanwhile, the pinpoint of the puncture needle is shielded in the recycle cylinder, so that medical staff cannot be punctured accidently by the used puncture needle or affected. Furthermore, a spring is arranged in the puncture-proof device, when a lock catch is pressed down to withdraw the needle, the puncture steel needle assembly can automatically return back to the recycle cylinder, so the medical staff can take operation conveniently with one hand.

Description

Anti-acupuncture anti-bleeding indwelling needle

technical field

The utility model relates to an infusion apparatus used for intravenous infusion for clinical patients in the medical field, in particular to an indwelling needle used for clinical puncture infusion and capable of preventing acupuncture and blood return.

Background technique

At present, indwelling needles are increasingly widely used clinically. When in use, guide the indwelling catheter into the veins of the human body through the puncture steel needle. After seeing the return of blood, confirm that the puncture is successful, pull out the puncture steel needle, and keep the indwelling catheter in the vein. , an external infusion device, and the liquid medicine is injected into the human body through the indwelling catheter. After the operator sees the return of blood, he must press the vein with his left hand, pull out the puncture needle with his right hand and quickly connect the prepared infusion set for infusion. There will be blood leakage and liquid leakage, which will easily infect the operator. At the same time, when the medical staff takes out the puncture needle, they will often be accidentally stabbed by the needle point, causing infection. If the patient is infected with SARS, AIDS, hepatitis B or other infectious diseases Patients, the consequences of cross-infection are unimaginable.

Contents of the invention

The purpose of this utility model is to provide an anti-acupuncture and anti-blood return indwelling needle, which can be inserted into the indwelling catheter after venous puncture, and when the puncture needle is withdrawn, the check valve in the catheter seat works to prevent blood from flowing out, which is convenient The medical staff connects the infusion device, and at the same time, shields the puncture needle in the recovery barrel, thereby preventing the medical staff from being accidentally stabbed by the exposed puncture needle.

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

An anti-needle puncture and anti-blood return indwelling needle, which includes a puncture steel needle assembly and an indwelling catheter assembly, and a check valve to prevent blood from flowing out is arranged in the indwelling catheter assembly; the puncture steel needle assembly is connected to The driving device is recovered, and a recovery cylinder for recovering the puncture needle assembly is set at the rear end of the puncture needle assembly. Driven by the recovery drive device, the puncture needle assembly is returned to the recovery cylinder.

The indwelling catheter assembly includes an indwelling catheter and a catheter base communicated with each other, wherein the indwelling catheter is fixed on the hollow catheter base, and the check valve is located inside the catheter base.

The check valve includes a fixing frame matched with the inner diameter of the catheter seat, a hollow core rod runs through the fixing frame, a through hole is provided at the front of the core rod, and a plug is provided at the front end of the core rod, and the diameter of the plug is greater than or equal to The diameter of the core rod.

A terminal is provided at the rear end of the core rod, and a spring is provided between the terminal and the fixing frame.

The puncture steel needle assembly includes a needle base and a needle tube fixed on the needle base. The base of the needle tip slope of the needle tube exposes the front end of the indwelling catheter by 0.01-0.5 mm; The buckle fits.

The lock buckle is "Z" shape, the upper end of the lock buckle is a pressing hand surface, and the lower end is a buckle matching with the groove.

The recovery driving device is a compression spring located between the needle base and the recovery cylinder, and the compression spring is sleeved on the steps of the needle base.

The recovery cylinder is composed of a recovery front cylinder and a recovery rear cylinder, and the combined inner hollow length is greater than the total length of the puncture needle assembly.

The outside of the indwelling catheter assembly and the puncture needle assembly is covered with a protective sheath.

Because the utility model adopts the above-mentioned solution, in the normal process of exiting the puncture needle, the function of the check valve can isolate the blood in the catheter seat, so as not to overflow and cause pollution. At the same time, the needle tip of the puncture needle is shielded in the recycling In the barrel, it prevents medical staff from being accidentally stabbed by the used puncture needle and causing infection. In addition, the utility model is equipped with a spring in the anti-acupuncture device. When the lock button is pressed to withdraw the needle, the puncture steel needle assembly will automatically return to the recovery cylinder, which is convenient for medical personnel to operate with one hand.

Description of drawings

Fig. 1 is a structural schematic diagram of the puncture steel needle assembly, the indwelling catheter assembly and the recovery cylinder of the utility model.

Fig. 2 is a structural schematic diagram of the protective sheath of the present invention.

Fig. 3 is a schematic diagram of the overall structure of the utility model.

Fig. 4 is a schematic structural view of the indwelling catheter assembly of the present invention.

Fig. 5 is a schematic structural view of the puncture needle assembly of the present invention.

Fig. 6 is a schematic structural view of the non-return valve of the present invention when it is not conducting.

Fig. 7 is a schematic diagram of the structure of the check valve of the present invention when it is turned on.

Fig. 8 is a structural schematic diagram of returning the puncture needle assembly of the utility model to the recovery cylinder.

Fig. 9 is a structural schematic diagram of the connection between the indwelling catheter assembly and the infusion device of the present invention.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model comprises a puncture steel needle assembly and an indwelling catheter assembly, and a check valve 13 to prevent blood outflow is arranged in the indwelling catheter assembly; and the puncture steel needle assembly is connected Recover the drive device, and set the recovery cylinder for recovering the puncture needle assembly at the rear end of the puncture needle assembly. Driven by the recovery drive device, the puncture needle assembly is returned to the recovery cylinder, and the catheter assembly and the puncture needle assembly are retained. A protective sleeve 6 is sheathed on the outside of the needle assembly.

As shown in Figure 4, the indwelling catheter assembly includes an indwelling catheter 11 and a catheter adapter 14 that communicate with each other, wherein the indwelling catheter 11 is fixed on the inner hollow catheter adapter 14 by a rivet 12, and the check valve 13 is located on the catheter adapter 14. Internal 6: The lower part of the inner cone head of 100, the check valve 13 is connected to the infusion device 7 to be in a conduction state during use, and will automatically close when the infusion device 7 is removed to prevent blood backflow.

As shown in Figures 6 and 7, the check valve 13 includes a fixed frame 133 that matches the inner diameter of the catheter seat 14, and a hollow core rod 131 runs through the fixed frame 133, and a through hole is provided at the front of the core rod 131, which is convenient The infusion flows out; and the front end of the core rod 131 is provided with a plug 134, which is a rubber pad, and the diameter of the plug 134 is greater than or equal to the diameter of the core rod 131. When the infusion is finished, in order to close the check valve 13 in time, a terminal 135 is provided at the rear end of the core rod 131 , and a spring 132 is provided between the terminal 135 and the fixed frame 133 . In the utility model, after the indwelling catheter is placed successfully, when the infusion device 7 is connected to start the infusion, the standard joint on the infusion device 7 pushes the core rod on the check valve 13, opens the channel, and starts to inject the liquid medicine into the human body After the infusion is completed, when the infusion device is removed, the external force is cancelled, and the passage is closed under the elastic force of the spring 132 of the check valve 13 to prevent the blood from flowing out.

As shown in Figure 5, the puncture steel needle assembly includes a needle base 22 and a needle tube 21 fixed on the needle base 22, wherein the rear end of the needle base 22 is provided with an air plug 23; the top of the needle base 22 is stepped, and the needle A groove is arranged on the top of the front end of the seat, and the groove is matched with the buckle 4 . The lock buckle 4 is "Z" shape, the upper end of the lock buckle 4 is a pressing hand surface, the lower end is a buckle matching with the groove, and the middle part is a circular inner hole. When the indwelling catheter assembly and the puncture steel needle assembly are combined in place, the root of the needle tip slope of the needle tube 21 exposes 0.01-0.5 mm from the front end of the indwelling catheter 11 .

In this case, the recovery driving device is a compression spring 5 located between the needle base 22 and the recovery cylinder, and the compression spring 5 is sleeved on the steps of the needle base 22 . The recovery cylinder is composed of a recovery front cylinder 31 and a recovery rear cylinder 32. The combined inner hollow length is greater than the total length of the puncture needle assembly. The front end of the recovery front cylinder 31 has a chute that cooperates with the lock buckle 4 to act as a fixed guide. The locking buckle 4 works; the compression spring 5 should have sufficient length and elastic force to return the puncture steel needle assembly to the bottom of the recovery back cylinder 32, so that the needle point is not exposed.

The working process of the utility model is: remove the protective cover 6 to prepare for venipuncture, after confirming that the puncture is successful, press the lock 4 while pulling out the puncture steel needle, after pressing the lock 4, the buckle of the lock 4 Separated from the needle base 22, the puncture steel needle assembly is recovered into the recovery cylinder 31, 32 by the elastic force of the compression spring 5. When the recovery cylinders 31, 32 are recovered to the cylinder body 31, 32 after the puncture steel needle assembly is recovered, the needle point is shielded in the cylinder body 31, 32, so that people will not be stabbed. When the puncture needle assembly withdraws, the check valve 13 in the catheter base 14 is activated to prevent the outflow of blood and prevent blood return.

It should be noted that the protective sheath 6 protects the needle tip of the needle tube 21 , the indwelling catheter 11 and the lock 4 from being activated during the handling and taking process.

Claims (9)

1. An anti-acupuncture and anti-blood return indwelling needle, which includes a puncture steel needle assembly and an indwelling catheter assembly, characterized in that: a check valve (13) is provided in the indwelling catheter assembly to prevent blood from flowing out; The puncture needle assembly is connected to the recovery driving device, and a recovery cylinder for recovering the puncture needle assembly is set at the rear end of the puncture needle assembly, driven by the recovery drive device, the puncture needle assembly returns to the recovery in the barrel. 2. The anti-acupuncture and anti-blood return indwelling needle according to claim 1, characterized in that: the indwelling catheter assembly includes an indwelling catheter (11) and a catheter adapter (14) communicating with each other, wherein the indwelling catheter ( 11) It is fixed on the catheter base (14) which is hollow inside, and the check valve (13) is located inside the catheter base (14). 3. The anti-acupuncture and anti-blood return indwelling needle according to claim 2, characterized in that: the check valve (13) includes a fixed frame (133) that matches the inner diameter of the catheter seat (14), and the hollow The core rod (131) runs through the fixing frame (133), the front part of the core rod (131) is provided with a through hole, and the front end of the core rod (131) is provided with a plug (134), and the diameter of the plug (134) is greater than or equal to that of the core rod (131) diameter. 4. The anti-acupuncture and anti-blood return indwelling needle according to claim 3, characterized in that: a terminal (135) is provided at the rear end of the core rod (131), and the terminal (135) is connected with the fixing frame (133) ) between springs (132). 5. The anti-acupuncture and anti-blood return indwelling needle according to claim 2, characterized in that: the puncture steel needle assembly includes a needle seat (22) and a needle tube (21) fixed on the needle seat (22), The root of the needle tip slope of the needle tube (21) exposes 0.01-0.5 mm from the front end of the indwelling catheter (11); a groove is provided on the top of the front end of the needle holder (22), and the groove is matched with the lock (4). 6. The anti-acupuncture and anti-blood return indwelling needle according to claim 5, characterized in that: the lock (4) is "Z" shaped, the upper end of the lock (4) is a pressing hand surface, and the lower end is a Grooves fit snaps. 7. The anti-acupuncture and anti-blood return indwelling needle according to claim 5, characterized in that: the recovery driving device is a compression spring (5) located between the needle seat (22) and the recovery cylinder, and the compression spring (5 ) on the step of the needle seat (22). 8. The anti-acupuncture and anti-blood return indwelling needle according to claim 1, characterized in that: the recovery cylinder is composed of a recovery front cylinder (31) and a recovery rear cylinder (32), and the combined inner hollow length is greater than Overall length of the needle assembly. 9. The anti-acupuncture and anti-blood return indwelling needle according to claim 1, characterized in that: the outside of the indwelling catheter assembly and the puncture needle assembly is covered with a protective sheath (6).

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