CN103127580B - Singlehanded safety indwelling needle - Google Patents

Abstract

The invention discloses a one-handed safety indwelling needle, which comprises a main body of the indwelling needle, a protective sheath connected behind the main body of the indwelling needle, and a puncture needle installed in the main body of the indwelling needle and the protective sheath. The puncture needle is U-shaped with a protruding handle, and the protective cover also has a protruding handle. Pressing the two handles in opposite directions can separate the puncture needle from the main body of the indwelling needle, and make the puncture needle fall into the protective cover. The indwelling needle disclosed by the invention can be operated with one hand, simultaneously achieves the purposes of safety protection and prevention of cross-infection, and is convenient for clinical use.

Description

One-hand safety indwelling needle

technical field

The invention belongs to the field of medical care, relates to a transfusion medical device, in particular to a one-handed safety indwelling needle which can be operated by 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.

In recent years, the infection of AIDS, hepatitis virus, etc. caused by the sharp edge of blood-contaminated injection needles in medical personnel has become a widespread concern. At present, many indwelling needles on the market still adopt the structure in which the puncture tip is exposed after the used puncture needle is separated from the hose, which is very easy to puncture the medical staff and threaten the health and life of the medical staff.

Contents of the invention

In view of this, the problem to be solved by the present invention is to provide a safe venous indwelling needle with a simple structure, easy to use, which can complete the whole puncture process with one hand and has a needle point protection function.

A one-handed safety 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 U-shaped, and one end thereof is a needle point for puncturing part, the other end is the handle part of the puncture needle used for operation, the protective cover is provided with a chute, the handle part of the puncture needle is actively arranged in the chute, and 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: a flexible tube for indwelling in the human body, a connecting tube for connecting an infusion set, and a Y-shaped tee for connecting the flexible tube and the connecting tube.

Further, for the three interfaces of the tee, the first interface is connected to the hose, the second interface is connected to the connecting pipe, the third interface is connected to the protective sleeve, and the end of the third interface is provided with a sealing A plug is provided in the center of the sealing plug with a first through hole through which only one puncture needle can pass through, and a groove is provided on the end surface of the third interface.

Further, a one-hand clamp and a joint are respectively provided at the middle section and the end of the connecting pipe.

Further, a needle tip protection sheath is also arranged outside the flexible tube.

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

Further, the tail end of the protective sheath is closed, including: a main body of the protective sheath and a sealing piece located at the top of the protective sheath, a second through hole is provided in the center of the sealing piece to allow only one puncture needle to pass through, and the protective sheath A groove cutout is also provided inside the main body, and a needlepoint groove is provided on the surface of the puncture needle, and the groove cutout can engage with the needlepoint groove.

Further, the distance between the incision of the groove and the closure piece is greater than the length from the tip of the needle point to the groove of the needle point, and the elastic sheet device is located inside the front end of the protective sheath and is buckled with the main body of the indwelling needle.

Further, a protective sheath handle is provided on the side of the protective sheath.

Further, the spring device includes a hook perpendicular to the groove cut and extending beyond the protective cover, a fixing column perpendicular to the hook and used to fix the elastic device, and a fixed column parallel to the fixing column and The elastic elastic piece abutted between the hook and the main body of the protective sheath is arranged behind the fixing column, and the protective sheath and the main body of the indwelling needle are fastened 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 .

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.

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

Fig. 2 is a schematic diagram of the main structure of the indwelling needle of the one-handed safety indwelling needle in the embodiment of the present invention;

Fig. 3 is a schematic structural view of the puncture needle of the one-handed safety indwelling needle in the embodiment of the present invention;

Fig. 4 is a schematic structural view of the protective sleeve of the one-handed safety indwelling needle in the embodiment of the present invention;

Fig. 5 is the shrapnel device inside the protective cover in the embodiment of the present invention;

Fig. 6-1 and Fig. 6-2 are diagrams of steps of using the one-handed safety indwelling needle in the embodiment of the present invention.

Detailed ways

The invention discloses a safe venous indwelling needle which 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 one-handed safety indwelling needle, the overall structure is shown in Figure 1, including three main parts: indwelling needle body 1, puncture needle 2 and protective sheath 3. 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 , the indwelling needle body 1 includes a flexible tube 11 indwelling in the human body, a connecting tube 12 , and a tee 14 connecting the flexible tube 11 and the connecting tube 12 . The hose 11, the connecting pipe 12 and the tee 14 are integrally formed as a whole. The other end of the connecting pipe is provided with a joint 13, and the middle section of the connecting pipe is equipped with a one-hand clamp 16. The indwelling needle body 1 also includes a needle tip protection cover 15 . There are three ports of the tee 14 : the first port leads to the hose 11 , the second port leads to the connecting pipe 12 , and the third port is used to connect with the protective cover 3 . One or a circle of grooves 17 is formed on the end surface of the third interface, and the grooves 17 are used to engage with the protective cover 3 . The end of the third interface is also provided with a sealing plug 18, and the center of the sealing plug 18 is opened to allow only one puncture needle to pass through the first through hole. Further, the through hole has a shielding cover connected with the sealing plug 18, so The shielding cover is tilted up due to the passage of the puncture needle 2. When the puncture needle 2 exits the through hole, the shielding cover automatically falls back due to the elasticity of the material and blocks the through hole. At this time, the third interface is completely closed, which can avoid the indwelling needle. Liquid leaks. In the above-mentioned tee 14, the flexible tube 11 is guided into the blood vessel through the puncture needle, and the infusion set is connected to the joint 13, and the infused liquid can flow through the joint 13 and the connecting tube 12 to the flexible tube 11 that has been placed in the blood vessel. In order to achieve intravenous infusion or medication. The one-hand clamp 16 can clamp the connecting tube 12 during the intermittent use of the indwelling needle, thereby preventing the blood from flowing back to the indwelling needle 1 . The needle tip protection cover 15 is a facility for protecting the indwelling needle when the needle is not in use.

As shown in FIG. 3 , the puncture needle 2 includes a puncture needle point 23, a puncture needle handle 21 and a guide rod 22 connecting the puncture needle point 23 and the puncture needle handle 21. The shape of the guide rod 22 is similar to a U shape, and the puncture needle point 23 A section of the U-shaped guide rod 22 is in a straight line, and the puncture needle handle 21 is perpendicular to the other end of the U-shaped guide rod 22 . The front part of the puncture needle point 23 is provided with a needle point groove 24, and the part from the puncture needle point 23 to the needle point groove 24 is a hollow structure, which is beneficial for medical personnel to observe the blood return during the puncture process.

As shown in Figure 4, the shape of the protective cover 3 is similar to a cylinder with a closed end, and its structure includes: a protective cover main body 35, a protective cover handle 31 vertically arranged on the side of the protective cover main body 35, a handle at the top of the protective cover 3 Closure sheet 32. The tail end of the main body of the protective sheath 3 is closed, and the top end is connected with the third interface of the tee 14 in the indwelling needle main body 1 through the protective sheath sealing piece 32 . The protective cover main body 35 has a channel on one side of the protective cover handle 31, which is also the channel through which the puncture needle guide rod 22 passes. An opening is provided in the middle part of the handle 31 of the protective sheath, and the opening is a gap for the handle 31 of the puncture needle to pass through. The inside of the protective cover main body 35 is provided with a groove cutout 33, and the groove cutout 33 is for when the puncture needle groove 24 retreats to this position, the groove cutout 33 can be engaged with the needle point groove 24 at the front part of the puncture needle point 23 to start The elastic device 34 enables the separation of the protective sheath 3 and the indwelling needle main body 1 . A second through hole is provided in the central part of the protective sheath sealing piece 32 for only one puncture needle to pass through. The second through hole also has a shielding cover whose structure is the same as that of the first through hole. When the puncture needle 2 retreats until the needle point 23 enters the protective cover 3, the opening of the sealing piece of the protective cover 3 is closed, so that the puncture needle point 23 cannot be exposed.

As shown in Figures 4 and 5, an elastic device 34 is provided at the end of the protective cover 3 close to the tee 14, and the device 34 includes a hook 341 perpendicular to the notch 33 of the groove and extending out of the protective cover. , a fixing column 342 perpendicular to the hook 341 for fixing the spring device, and an elastic piece 343 arranged behind the fixing column 342 and laterally against the inner wall of the protective cover 3 and the hook 341 . The working principle of the shrapnel device 34 is: when the puncture needle 2 passes through the notch 33, the notch 33 is forced to open, the shrapnel 343 is compressed, and the rear end of the hook 341 with the fixed column 342 as the fulcrum faces the inner wall of the protective cover 3. Close together so that the front section of the hook 341 clamps down on the groove 17 at the end of the third interface of the tee 14, so that the protective sleeve 3 and the tee 14 remain relatively fixed; When the groove 24 is fully engaged with the groove notch 33, due to the small diameter of the needle point groove 24, the elastic piece 343 can be stretched to make the groove notch 33 descend. At this time, the front section of the hook 341 can rise through the fulcrum of the fixing column 342, Thus, the hook 341 is released from the groove 17 of the third interface, and the protective sheath 3 and the indwelling needle main body 1 can be separated.

The usage method of the embodiment disclosed in the present invention: routinely tie a tourniquet, sterilize the skin, connect the infusion set and the indwelling needle joint 13, exhaust air, and after preparing the indwelling needle film and other things, the left hand can tighten the skin or assist in fixing the patient The limbs are operated entirely with the right hand. The right thumb and forefinger are respectively against the handle 31 of the protective cover and the handle 21 of the puncture needle. At this time, force should not be applied to each other, as long as the needle can be held stably. Pull out the needle tip protection sheath 15, insert the needle at an appropriate angle directly above the blood vessel according to the shape of the blood vessel, and place the indwelling needle flat after seeing the blood return, and apply force with the index finger and thumb of the right hand to make the puncture needle handle 21 and the protective sheath handle 31 move toward each other At this time, the puncture needle 2 retreats outward in the hose 11, and the direction of the right hand and the strength of the right thumb and index finger are controlled so that the puncture needle does not move relative to the skin puncture point and the hose is sent into the blood vessel. After one-third to two-thirds enter the blood vessel, coordinately control the movement of the right hand and the index finger of the right hand, so that the puncture needle point 23 moves backward and the flexible tube 11 continues to move forward until the puncture needle 2 completely enters the protective cover 3, and at the same time softly The tube 11 completely enters the blood vessel. At this time, the needle point groove 24 on the puncture needle 2 reaches the groove incision 33 in the protective sheath 3, the shrapnel device 34 is activated, the protective sheath 3 is separated from the indwelling needle main body 1, and the protective sheath seals the piece 32 at the same time. The small hole in the middle is sealed to prevent the needle tip from being exposed; at the same time, the puncture needle handle 21 meets the protective sheath handle 31. After the puncture process is completed, loosen the tourniquet, adjust the drip rate of the liquid, and stick the indwelling needle film. Put the protective sheath 3 and the puncture needle 2 that has entered the protective sheath 3 into the designated recycling device.

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

(1) The protective sleeve 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 .

(2) The entire puncture process can be completed with one hand, which frees the operator's hand to fix the skin or puncture the side limbs, so that the puncture of the indwelling needle is more accurate, reducing the harm to the patient's body and improving the medical staff. work efficiency.

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 contains 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 (9)

1. a single-hand safety remaining needle, comprise remaining needle main body and puncture needle, it is characterized in that, also comprise the protective sleeve that is connected to described remaining needle main body rear, described puncture needle is U-shaped, its one end is the tip portion for puncturing, the other end is the puncture needle handle part for operating, described protective sleeve is provided with a chute, described puncture needle handle part is actively arranged in described chute, between described remaining needle main body and protective sleeve, be connected by a shrapnel device, described shrapnel device touches shrapnel device by the slip of puncture needle handle part and separates, to realize the dismounting between described remaining needle main body and protective sleeve, described protective sleeve tail end sealing, comprise: protective sleeve main body and the closure plate that is positioned at protective sleeve top, described closure plate central authorities are provided with one and only hold the second through hole that a root puncture pin passes through, described protective sleeve body interior is also provided with a groove otch, described puncture needle surface is provided with a needle point groove, described groove otch can engage with this needle point groove, described shrapnel device comprises perpendicular to described groove otch and extends to the grab beyond protective sleeve, perpendicular to described grab and for the fixed leg of fixation spring tab device, and parallel with described fixed leg and establish and be against the elastic shell fragment that has between grab and described protective sleeve main body.

2. single-hand safety remaining needle according to claim 1, is characterized in that, described remaining needle main body comprises: for being retained in flexible pipe in human body, for connecting the connection tube of transfusion device and for connecting the Y-type three way type of described flexible pipe and connection tube.

3. according to the single-hand safety remaining needle described in any one claim in claim 2; it is characterized in that; three interfaces of described threeway; first interface is connected with described flexible pipe; the second interface is connected with described connection tube, and the 3rd interface is connected with protective sleeve, and described the 3rd interface end is provided with a sealing-plug; sealing plug central authorities are provided with one and only hold the first through hole that a root puncture pin passes through, and described the 3rd interface end surface is provided with groove.

4. single-hand safety remaining needle according to claim 2, is characterized in that, is respectively equipped with one-hand clip and joint at stage casing and the end of described connection tube.

5. single-hand safety remaining needle according to claim 2, is characterized in that, also disposes needle point protective sleeve outward at described flexible pipe.

6. single-hand safety remaining needle according to claim 1, is characterized in that, described puncture needle surface is provided with a needle point groove, and described puncture needle is hollow needle tubing from needle point to groove position.

7. single-hand safety remaining needle according to claim 1; it is characterized in that; distance between described groove otch and closure plate is greater than the most advanced and sophisticated length to needle point groove of described needle point, and described shrapnel device is positioned at protective sleeve front end inside, interlocks with remaining needle main body.

8. single-hand safety remaining needle according to claim 1, is characterized in that, described protective sleeve side is provided with a protective sleeve handle.

9. single-hand safety remaining needle according to claim 1, is characterized in that, described shell fragment is arranged at the rear of described fixed leg, and described protective sleeve and remaining needle main body interlock by described grab.