CN103110997B - Straight type single-hand remaining needle - Google Patents

Abstract

The invention discloses a straight type single-hand remaining needle which comprises a remaining needle body, a protection cover and a puncture needle, wherein the protection cover is connected with the rear portion of the remaining needle body, and the puncture needle is installed in the remaining needle body and the protection cover. The puncture needle is L-shaped and provided with a protruding handle. The puncture needle can be separated with the remaining needle body by moving the puncture needle handle backwards, and the puncture needle can drop into the protection cover. The remaining needle can achieve single-hand operations and meanwhile achieve the purposes of safe protection and cross infection preventing, and thus the remaining needle is convenient in clinical use.

Description

A straight one-handed indwelling needle

technical field

The invention belongs to the field of medical care and relates to an infusion medical device, in particular to a safe straight indwelling needle which can be operated with one hand.

Background technique

The intravenous indwelling needle can reduce the pain caused by repeated punctures, protect blood vessels, facilitate clinical medication and emergency rescue, and reduce the workload of nursing staff.

At present, the indwelling needles on the market are mainly composed of flexible tubes and puncture needles. When puncturing, the operator needs to fix the puncture site with his left hand and tighten the local skin, and hold the needle with his right hand to perform puncture. After blood returns, the operator needs to loosen the left hand that fixed the puncture site. , fix the indwelling needle hose with the left hand and send the tube forward, and pull out the needle core with the right hand to complete the puncture. During the whole process, the operator must cooperate with both hands to operate the indwelling needle, so that the puncture can be successfully completed. However, for infants who are prone to struggle, elderly patients with relatively loose skin, or adults who are twitching or restless, loosen the left hand that fixes the puncture site and fix the indwelling needle hose with the left hand, which may cause the front end of the hose Detachment of the blood vessel makes the subsequent tube delivery fail. At present, there is no indwelling needle that can complete the whole puncture process with one hand.

Regarding the straight indwelling needle, the straight indwelling needle currently used in clinical practice often needs to press the front part of the indwelling needle hose to stop bleeding, and at the same time quickly connect the connector or infusion set. This operation is difficult to complete and it is easy to cause blood to flow out along the hose. other than the needle.

In recent years, it has become a widespread concern that medical personnel are infected with AIDS and hepatitis viruses due to false punctures by blood-contaminated injection needles and other sharp blades. At present, many indwelling needles on the market still expose the puncture tip after the used puncture needle is separated from the hose, which can easily injure medical staff and threaten the life and health of medical staff.

Contents of the invention

In view of this, the problem to be solved by the present invention is to provide a safe straight one-handed indwelling needle with simple structure, convenient use, one-handed completion of the entire puncture process and needle tip protection function.

A straight single-handed indwelling needle, comprising a main body of the indwelling needle and a puncture needle, characterized in that it also includes a protective cover connected behind the main body of the indwelling needle, the puncture needle is L-shaped, and includes a needle tip part for puncturing, And the handle part of the puncture needle which is perpendicular to the needle point and used for operation, the protective cover is provided with a chute, the handle part of the puncture needle is actively arranged in the chute, the indwelling needle main body and the protective cover It is connected by an elastic sheet device, and the elastic sheet device is separated by sliding and touching the elastic sheet device on the handle part of the puncture needle, so as to realize the disassembly and assembly between the indwelling needle main body and the protective sheath.

Further, the indwelling needle body includes an infusion hose, a bucket-shaped indwelling needle handle and a positive pressure connector. A one-way valve is provided at the connection port between the infusion hose and the indwelling needle handle. Through threaded connection, grooves are opened on the end surface of the positive pressure joint.

Further, the indwelling needle body is also equipped with a needle tip protection sleeve.

Further, the protective cover is a cylindrical container with a closed end, and the positive pressure joint connected to the main body of the indwelling needle at the end, the front end of the protective cover is provided with a sealing sheet, and the center of the sealing sheet is provided with a A through hole through which the puncture needle passes, a groove cut is also provided in the protective cover, and a needle point groove is provided on the surface of the puncture needle, and the groove cut can be engaged with the needle point groove.

Further, the surface of the puncture needle is provided with a needle tip groove, and the part of the puncture needle from the needle tip to the groove is a hollow needle tube.

Further, the distance between the groove cutout and the sealing sheet is greater than the length from the tip of the puncture needle point to the needle point groove.

Further, the elastic device includes a hook perpendicular to the cutout of the groove and extending beyond the protective cover, and a hook arranged parallel to the sealing sheet and abutted between the hook and the protective cover. An elastic shrapnel, the shrapnel is located between the sealing sheet and the notch of the groove, the hook and the sealing sheet are vertically fixed in a cross shape, and the protective sleeve can be buckled with the main body of the indwelling needle through the hook.

Compared with the prior art, the present invention has the following advantages:

(1) The entire puncture process can be completed with one hand, freeing the operator's hand to fix the skin or puncture the side limbs, thereby making the puncture of the indwelling needle more accurate, reducing the harm to the patient's body, and improving the medical staff. work efficiency.

(2) The protective cover structure of the puncture needle is used to protect the puncture needle in time, avoiding the exposure of the needle tip, and eliminating the phenomenon that the puncture needle is easy to stab medical staff or other personnel, so as to achieve the purpose of safety protection and prevention of cross-infection .

(3) Combined use of one-way valve and positive pressure connector to ensure that blood will not flow out of the indwelling needle along the infusion hose after the indwelling needle is punctured, simplifying the operation steps of the straight indwelling needle and improving clinical reliability of use.

(4) The positive pressure connector and the indwelling needle handle are connected through threads, and the model is the same as the standard infusion connector. During the indwelling needle indwelling period, the connector can be replaced as needed.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Figure 1 is a schematic diagram of the overall structure of a straight one-handed indwelling needle in an embodiment of the present invention;

2 is an overall structural diagram of the main body of the indwelling needle in the embodiment of the present invention;

3 is an exploded view of the main body of the indwelling needle in the embodiment of the present invention;

Fig. 4 is a schematic structural view of a puncture needle in an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a protective cover in an embodiment of the present invention;

6 is a schematic structural view of the shrapnel device in the embodiment of the present invention;

Fig. 7-1 to Fig. 7-3 are diagrams showing the steps of using the straight indwelling needle in the embodiment of the present invention.

Detailed ways

The invention discloses a safe straight venous indwelling needle that can complete the whole puncture and catheter delivery operation with one hand. The invention will be specifically described below according to the preferred embodiment shown in the accompanying drawings.

A straight one-handed indwelling needle. The overall structure is shown in FIG. The indwelling needle main body 1 is connected with the protective sheath 3 , and the puncture needle 2 passes through the center of the indwelling needle main body 1 and the protective sheath 3 .

As shown in FIG. 2 and FIG. 3 , the indwelling needle body 1 includes an infusion tube 11 indwelling in the human body, a bucket-shaped indwelling needle handle 13 , and a positive pressure connector 14 for connecting with a protective sheath 3 or an infusion set. A one-way valve 12 is provided at the connection between the infusion hose 11 and the indwelling needle handle 13 , and the indwelling needle handle 13 is connected to the positive pressure connector 14 through threads (not shown in the figure). Among them, the infusion hose 11 is guided into the blood vessel through the puncture needle 2, and the infusion set is connected to the positive pressure joint 14, and the infused liquid can flow to the infusion hose 11 indwelling in the blood vessel through the positive pressure joint 14 and the indwelling needle handle 13 In order to achieve intravenous infusion or medication. The positive pressure joint 14 can ensure that when the infusion or medication is finished, the infusion set or syringe is separated from the indwelling needle main body 1, a momentary positive pressure is generated inside the positive pressure joint 14, so that the liquid in the indwelling needle flows to the blood vessel, thereby avoiding blood return. blood vessel blockage. The one-way valve 12 can ensure the flow direction of the liquid in the indwelling needle, so that the liquid can only flow from the positive pressure connector 14 to the infusion hose 11. When the indwelling needle is indwelling in the human blood vessel, its one-way control function can reduce the indwelling needle The occurrence probability of blood coagulation blocking the infusion hose 11. The end surface of the positive pressure joint 14 is provided with one or a circle of grooves 15 . The indwelling needle main body 1 also includes a needle tip protection cover 4, which is a protection device when the indwelling needle is not in use.

As shown in FIG. 4 , the puncture needle 2 is L-shaped, including a puncture needle point 21 and a handle 23 . The front part of the puncture needle point 21 is provided with a needle point groove 22, and the structure from the puncture needle point 21 to the needle point groove 22 is hollow, which is beneficial for medical staff to observe the blood return during the puncture process.

As shown in FIG. 5 , the shape of the protective sheath 3 is similar to a cylinder with a closed end and a slightly larger front end. The top of the protective sheath 3 is provided with a sealing piece 32 , which is connected to the end of the positive pressure joint 14 with the indwelling needle main body 1 . A hole is opened on the side of the protective cover 3 , and the hole is the movable track of the puncture needle handle 23 . The inside of the protective cover 3 is provided with a groove cutout 31. When the needlepoint groove 22 of the puncture needle retreats to this position, the groove cutout 31 can be engaged with the needlepoint groove 22 at the front of the puncture needle 2, and the shrapnel device 34 is activated, so that The protective sheath 3 can be separated from the indwelling needle main body 1 . A through hole is opened in the center of the sealing sheet 32 of the protective sleeve, and only one puncture needle can pass through. Further, the through hole has a shielding cover connected to the sealing sheet 32, and the shielding cover is tilted due to the passage of the puncture needle 2. After the puncture needle 2 withdraws from the through hole, the shielding cover automatically falls back due to the elasticity of the material and blocks the through hole, so that the puncture needle tip cannot be exposed.

As shown in Figure 6, an elastic device 34 is also provided at the end of the protective cover 3 close to the positive pressure joint, which includes a hook 35 perpendicular to the groove cutout and extending out of the protective cover, and a The rear of the fixing column 36 is laterally against the elastic piece 37 between the inner wall of the protective cover 3 and the hook 35, and the hook 35 is fixedly connected with the sealing piece 32 in a cross shape, and the hook 35 and the sealing piece 32 are connected to each other. A part of it is used as a fixed column 36. The working principle of the shrapnel device is: when the puncture needle 2 passes through the notch 31, the notch 31 is forced to open, the shrapnel 37 is compressed, and the rear end of the hook 35 with the fixed column 36 as the fulcrum faces the inner wall of the protective cover 3. Close together so that the front section of the hook 35 clamps down on the groove 15 at the end of the positive pressure joint 14, so that the protective cover 3 and the indwelling needle main body 1 remain relatively fixed; When the notch 31 is fully engaged, due to the small diameter of the needle point notch 22, the shrapnel 37 can be stretched to lower the notch 31. At this time, the front part of the hook 35 can rise through the fulcrum of the fixing column 36, so that the hook 35 The protective sheath 3 and the indwelling needle main body 1 can be separated by releasing the groove 15 of the positive pressure connector 14 .

As shown in Figure 7-1 to Figure 7-3, the usage method of the disclosed embodiment of the present invention: routinely tie a tourniquet, disinfect the skin, connect the infusion set and exhaust, prepare the indwelling needle film and other things, and then use the left hand Tighten the skin or assist in immobilizing a patient's limb, all with the right hand. Pinch both sides of the protective cover 3 with the thumb and middle finger of the right hand, place the index finger at the handle 23 of the puncture needle, keep the needle stable, and pull out the needle protection cap 4 . Insert the needle directly above the target blood vessel at a suitable angle, place the indwelling needle after seeing the blood return, push the index finger backward, so that the puncture needle tip 21 slowly partly exits the infusion tube 11, pinch the protective sheath 3 with the thumb and middle finger of the right hand to push the entire indwelling needle Enter the blood vessel, and at the same time control the movement of the handle 23 with the index finger, so that the infusion hose 11 enters the blood vessel and the puncture needle 2 retreats in the infusion hose 11 until the infusion hose 11 completely enters the blood vessel, and after the puncture needle tip 21 is completely out of the positive pressure joint 14, At this time, the needle tip groove 22 reaches the groove cutout 31 in the protective sheath, and the spring device 34 is activated to separate the positive pressure joint 14 from the protective sheath 3 . Simultaneously, the shield cover in the middle of the sealing sheet 32 falls back, and the through hole is sealed to prevent the needle tip from being exposed. After the puncture process is completed, the tourniquet is loosened, and the indwelling needle film is pasted. Then connect the infusion set to the positive pressure connector 14 and get final product. Due to the combined use of the one-way valve 12 and the positive pressure joint 14, it can be ensured that the blood will not flow out of the indwelling needle. Put the protective sheath 3 and the puncture needle 2 that has entered the protective sheath 3 into the designated recycling device.

The positive pressure connector 14 is connected to the indwelling needle handle 13 through threads, and is the same type as the standard infusion connector. During the indwelling needle indwelling period, the connector can be replaced as required.

Compared with the prior art, the present invention has the following advantages:

(1) The entire puncture process can be completed with one hand, freeing the operator's hand to fix the skin or puncture the side limbs, thereby making the puncture of the indwelling needle more accurate, reducing the harm to the patient's body, and improving the medical staff. work efficiency.

(2) The protective cover structure of the puncture needle is used to protect the puncture needle in time, avoiding the exposure of the needle tip, and eliminating the phenomenon that the puncture needle is easy to stab medical staff or other personnel, so as to achieve the purpose of safety protection and prevention of cross-infection .

(3) Combined use of one-way valve and positive pressure connector to ensure that blood will not flow out of the indwelling needle along the infusion hose after the indwelling needle is punctured, simplifying the operation steps of the straight indwelling needle and improving clinical reliability of use.

(4) The positive pressure connector and the indwelling needle handle are connected through threads, and the model is the same as the standard infusion connector. During the indwelling needle indwelling period, the connector can be replaced as needed.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A straight single-handed retention needle, comprising a retention needle body and a puncture needle, characterized in that it also includes a protective cover connected behind the retention needle body, the puncture needle is L-shaped, and includes a needle point for puncture part, and the handle part of the puncture needle which is perpendicular to the needle point and used for operation, a chute is provided on the protective cover, and the handle part of the puncture needle is actively arranged in the chute, the main body of the indwelling needle and the protective cover They are connected by a shrapnel device, and the shrapnel device is separated by sliding and touching the shrapnel device of the handle part of the puncture needle, so as to realize the disassembly and assembly between the indwelling needle body and the protective cover, and the front end of the protective cover is provided with a sealing sheet , there is also a groove cut in the protective cover, a needle point groove is provided on the surface of the puncture needle, and the groove cut can be engaged with the needle point groove, and the shrapnel device includes a The groove is notched and extended to the hook outside the protective sleeve, and the elastic elastic piece is arranged parallel to the sealing sheet and abuts between the hook and the protective sleeve, and the elastic sheet is located between the sealing sheet and the groove Between the incisions, the hook and the sealing sheet are vertically fixed in a cross shape, and the protective sleeve can be buckled with the main body of the indwelling needle through the hook. 2. The straight one-handed indwelling needle according to claim 1, wherein the indwelling needle body includes an infusion hose, a bucket-shaped indwelling needle handle and a positive pressure connector, and the infusion hose and indwelling needle handle connection port A one-way valve is arranged at the position, and the indwelling needle handle and the positive pressure joint are connected through threads, and a groove is opened on the end surface of the positive pressure joint. 3. The straight one-handed indwelling needle according to claim 2, wherein the indwelling needle main body is also equipped with a needle tip protection cover. 4. The straight one-handed indwelling needle according to claim 2, characterized in that, the protective sheath is a cylindrical container with a closed end, and is connected to the positive pressure joint at the end of the indwelling needle main body, and the protective sheath The front end is provided with a sealing sheet, and the center of the sealing sheet is provided with a through hole through which only one puncture needle can pass. 5 . The straight one-handed indwelling needle according to claim 1 , wherein a needle point groove is provided on the surface of the puncture needle, and the part of the puncture needle from the needle point to the groove is a hollow needle tube. 6 . The straight one-handed indwelling needle according to claim 1 , wherein the distance between the incision of the groove and the sealing sheet is greater than the length from the tip of the puncture needle point to the groove of the needle point.