WO2016015364A1 - Safe blood sampling needle - Google Patents

Abstract

Disclosed is a safe blood sampling needle, comprising a needle base (2), a needle sleeve (5), a needle head (6), a sliding part (1), a handle (7) and limiting mechanisms. The needle base (2) is cylindrical. One end of the needle base (2) is fixed and in communication with the needle head (6), and the other end is provided with a port connected with an external conveying pipe. The sliding part (1) is shaped like a cylinder with two open ends and is movably arranged on the needle base (2) in a sleeved mode. The length, in the moving direction, of the sliding part (1) is larger than that of the needle head (6). The length, in the axial direction, of the needle base (2) is larger than that of the needle head (6). The limiting mechanisms are arranged on the sliding part (1) and the needle base (2). The handle (7) is adjacent to the needle base (2) and is fixed to the sliding part (1). The sliding part (1) is provided with a protecting cover (4). The sliding part (1) and the protecting cover (4) are fixed. A joint part between the protecting cover (4) and the sliding part (1) is smooth. The blood sampling needle avoids the use of a spring type needle head and is further provided with the protecting cover (4) for protecting the sliding part (1) and being smoothly joined with the sliding part (1), and therefore the pain of patients is relieved.

Description

 Safety blood collection needle This application requires a Chinese patent application on July 28, 2014.

Priority of CN201410363854.6. This application cites the entire text of the above-mentioned Chinese patent application. Technical field

 The invention relates to a blood collection needle, in particular to a safety blood collection needle. Background technique

 The blood sampling technique is now quite mature, but it does not reach the goal of not collecting blood from the patient, or the initial process of the test is performed by the blood collection needle and the blood collection tube. Therefore, the blood collection needle is currently the largest in the world. One of the medical device products. However, it is worth noting that millions of people occur every year in hospitals around the world due to needle breakage or improper handling of medical personnel. Statistics published by the American Medical Association show that only about 1 million health care workers in the United States are accidentally injured by blood-collecting needles each year. At least a thousand of them are infected with hepatitis B virus, hepatitis C virus and HIV attached to the needle. The cost of first aid treatment for each medical staff and patient who is injured by a broken needle is $3,000 per person.

 Domestic and foreign companies have been vigorously investing in the research and development of safe blood collection medical equipment. At present, there are many safe blood collection needles on the market. These safety blood collection equipments have many shortcomings: First, the production cost is high; second, the production process is complicated; the third is production. The quality is difficult to guarantee; the fourth is the cumbersome operation of medical personnel; the fifth is that the safety function is difficult to guarantee.

At present, the commonly used disposable blood collection needle needs to be put on the needle sleeve to protect the needle before use, for example, to prevent the needle from being bent or collided. When using, when pulling out the needle sleeve, it is easy to cause a risk of bruising, but the real danger is after the blood collection is completed, after being taken out from the blood collection person, when it is disposed of, whether it is put into a professional disposal box or The upper needle sleeve is vulnerable to bruises, causing serious consequences such as medical staff infection. In response to this defect, some blood collection needles use a technique of a telescopic needle. After the blood collection is completed, the needle is retracted into a protective sleeve for protecting the needle by using a spring force such as a spring. In this way, although the needle can be effectively protected and the medical staff is prevented from being bruised, the patient suffers great pain due to the mechanical action of the needle retracting.

 In addition, when the blood collection needle is operated, it often needs to be attached to the skin, and when the existing blood collection needle is in operation, the components and parts of the blood collection needle are often not smooth, or there is a gap. As a result, the patient's skin may be pinched or stuck, which may aggravate the patient's pain. Summary of the invention

 The technical problem to be solved by the present invention is to overcome the defects of the prior art that the safety is low and the pain of the patient is easily aggravated, and a blood collection needle with higher safety and less pain of the patient is provided.

 The present invention solves the above technical problems by the following technical solutions:

 A safety lancet comprising a needle seat, a needle sleeve and a needle, the needle sleeve being sleeved on the needle, wherein the safety lancet further comprises a sliding member, a handle and a limit The needle hub is cylindrical, one end of the needle seat is fixed and communicates with the needle, and the other end is provided with an interface connected with an external conveying pipe;

 The sliding member is a cylindrical shape with two ends open and is sleeved on the needle seat, and the length of the sliding member in the moving direction is greater than the length of the needle;

 The axial length of the needle hub is greater than the length of the needle;

 The limiting mechanism is disposed on the slider and the needle seat, and is configured to fix the slider to the needle seat after the sliding member slides to completely shield the needle;

 The handle abuts the needle seat and is fixed to the slider;

 The sliding member is provided with a protective cover for protecting the limiting mechanism;

 The slider is fixed to the protective cover, and a joint between the protective cover and the slider is smooth.

That is, the blood collection needle of the present invention has a needle holder longer than the needle, so that the above-mentioned cylindrical shape The slider can then slide back and forth over the hub such that the needle switches between being obscured by the slider and fully exposed. The limit mechanism is used to limit the movement of the slider.

 Since the stopper mechanism on the slider may be erroneously operated due to an external collision, a protective cover is provided on the slider to protect the stopper mechanism on the slider. In addition, the joint between the protective cover and the slider is set to be smooth due to the contact of the patient's skin.

 In use, in the initial state, the sliding member is fixed to the needle seat through the limiting mechanism, (ie, the needle is completely exposed), the needle sleeve is first removed, and blood is collected; after the blood collection is completed, the fixing of the sliding member and the needle holder is released, The slider slides in the direction of the needle until the slider completely shields the needle, and the slider is once again fixed to the needle holder (through the limit mechanism). In this way, since the needle sleeve can be shielded by wearing the needle sleeve, the safety is greatly improved.

 In addition, the handle is fixed on the needle seat, on the one hand, the handle can be held by hand during operation, and on the other hand, the handle is pressed against the needle seat, so that only one thumb is needed while pressing the handle and the slide to perform an active operation. This makes the operation more convenient than existing blood collection needles.

 Preferably, the limiting mechanism includes a first elastic washer and two second elastic washers; the first elastic washer is attached to an inner circumference of the sliding member away from the end of the needle, and The edge of the first elastic gasket is smoothly fitted to the inner wall of the sliding member;

 Two of the second elastic gasket sleeves are affixed to the needle hub, and the second elastic gasket is configured to be used when the slider slides to completely shield the needle or the needle is completely exposed The first resilient washer is snapped to limit movement of the slider.

 That is, when the slider slides in the direction of the needle to the shielding needle or the needle is completely exposed, in order to fix the slider and the needle holder, the second elastic washer and the inner circumference of the slider on the outer circumference of the needle seat as the limiting mechanism The first elastic washer on the upper side is snap-fitted. Since the first elastic gasket is smoothly fitted to the inner wall of the slider, it can be smoothly pushed to a position where it is engaged with the second elastic gasket.

 Preferably, the limiting mechanism comprises an elastic fastener and two card slots;

The two card slots are disposed on the needle seat, the elastic fastener is disposed on the sliding member, and the two card slots and the elastic fastener are used for sliding the slider to completely cover Needle or needle When fully exposed, it is engaged with the elastic fastener to limit the movement of the slider.

 That is to say, the sliding member slides along the axial direction of the needle seat, and when the blood collection is required, the elastic fastener on the sliding member is engaged with the slot of the needle holder at the end close to the needle holder, and the needle is completely exposed. After the blood collection is completed, when the needle needs to be shielded, slide the slider to the elastic fastener to engage with the card slot at the other end of the needle holder to cover the needle. Further, the elastic fastener as used herein refers to a fastener which maintains the engagement relationship by the elastic force in the prior art, and the engagement relationship can be released as long as an external force greater than the elastic force is applied.

 Preferably, the sliding member is provided with at least one anti-slip zone.

 Here, the anti-slip zone is set to allow the finger to have greater friction when pushing the slider. For example, a rubber material having a large coefficient of friction may be wrapped around the slider or an area on the slider may be waved/ The pit is shaped to increase the contact area of the finger against the slider.

 Preferably, the sliding member is made of an elastic material, and the sliding member is integrally formed with the elastic fastener. The needle holder is integrally formed with the card slot, and the sliding member is provided with a plurality of hollow regions.

 Here, the hollowed out area is provided on the one hand so that the position of the needle can still be observed by the naked eye when the slider shields the needle, so that the operation is more safe; on the other hand, the first elastic snap member is arranged integrally with the sliding member. At the time, the hollowed out area provides an active space for the action of the first elastic snap fastener.

 Preferably, the sliding member comprises a smooth end surface, and an extending angle of the end surface and an axial line of the needle holder have an angle of 5 to 10 degrees.

 Here, since the needle is inserted into the human body for blood collection, the axis of the needle and the needle hub is usually at an angle of 5 to 10° with respect to the skin plane, which means that when the safety lancet is operated, the slider is in contact with the skin. The angle of the surface is also 5~10° with the above-mentioned axis, which can make the blood collection process smoother and reduce the pain of the patient.

The positive progress of the invention is as follows: the sliding member is arranged to slide on the needle seat to shield the needle, so that the safety of the needle treatment after blood collection is greatly improved; since the use of the spring type needle is avoided and the protective cover is further provided to protect the sliding member And smooth joint with the slider, reducing the pain of the patient. DRAWINGS 1 is a schematic view showing the structure of a safety lancet according to a preferred embodiment of the present invention.

 Figure 2 is a cross-sectional view taken along line A-A of Figure 1. detailed description

 The invention is further illustrated by the following examples, which are not intended to limit the invention.

 1 is a schematic structural view of a safety lancet of the present embodiment, and FIG. 2 is a cross-sectional view of FIG. 1 along A-A. As shown in FIG. 1 to 2, the safety lancet according to the embodiment includes:

 The needle holder 2, the slider 1, the handle 7, the needle sleeve 5, the needle 6 and a limiting mechanism, the needle sleeve 5 is sleeved on the needle 6, the needle holder 2 is cylindrical, and one end of the needle holder 2 is fixed and communicates with the needle 6 The other end is provided with an interface connected with an external duct;

 The slider 1 is a cylindrical shape with open ends and is sleeved on the needle holder 2, and the length of the slider 1 in the movable direction is larger than the length of the needle 6.

 The axial length of the hub 2 is greater than the length of the needle 6.

 The limiting mechanism includes an elastic fastener 11 and a card slot 31 and a card slot 32.

 The card slot 31 and the card slot 32 are disposed on the hub 2, and the elastic fastener 11 is disposed on the slider 1. The slot 31, the slot 32 and the elastic fastener 11 are used to slide the slider 1 to completely shield the needle 6 or When the needle 6 is completely exposed, it is engaged with the elastic fastener 11 to restrict the movement of the slider 1.

 The handle 7 abuts the needle hub 2 and is fixed to the slider 1.

 A protective cover 4 for protecting the stopper mechanism is provided on the slider 1.

 The slider 1 is fixed to the protective cover 4, and the joint between the protective cover 4 and the slider 1 is smooth. The slide member 1 is provided with an anti-slip zone 12 and an anti-slip zone 13.

 The sliding member 1 is made of an elastic material, the sliding member 1 is integrally formed with the elastic fastening member 11, the needle holder 2 is integrally formed with the slot 31 and the slot 32, and the sliding member 1 is provided with a plurality of hollow areas (not shown in the figure). ).

The slider 1 includes a smooth end face with a 5 between the extended face of the end face and the axis of the hub. The angle of the. Since the needle 6 is inserted into the human body for blood collection, the axis of the needle 6 and the needle hub 2 is usually at an angle of 5 to 10° with respect to the skin plane, which means that the slider 1 is in contact with the skin when the safety lancet is operated. The angle of the surface is also 5~10° with the above-mentioned axis, which can make the blood collection process smoother and reduce the pain of the patient.

 On the other hand, there is no seam at the joint between the protective cover 4 and the slider 1 on the surface in contact with the skin, and the patient's skin is not caught during operation.

 While the invention has been described with respect to the embodiments of the present invention, it is understood that the scope of the invention is defined by the appended claims. A person skilled in the art can make various changes or modifications to these embodiments without departing from the principles and spirit of the invention, for example, instead of using a snap structure such as a resilient fastener and a card slot, The elastic washers are fastened to each other such as the sliders, etc., but these changes and modifications fall within the scope of the present invention.

Claims

Rights request A safety lancet comprising a needle seat, a needle sleeve and a needle, the needle sleeve being sleeved on the needle, wherein the safety lancet further comprises a sliding member, a handle and a needle a limiting mechanism, the needle hub is cylindrical, one end of the needle seat is fixed and communicates with the needle, and the other end is provided with an interface connected with an external conveying pipe;  The sliding member is a cylindrical shape with two ends open and is sleeved on the needle seat, and the length of the sliding member in the moving direction is greater than the length of the needle;  The axial length of the needle hub is greater than the length of the needle;  The limiting mechanism is disposed on the slider and the needle seat, and is configured to fix the slider to the needle seat after the sliding member slides to completely shield the needle;  The handle abuts the needle seat and is fixed to the slider;  The sliding member is provided with a protective cover for protecting the limiting mechanism;  The slider is fixed to the protective cover, and a joint between the protective cover and the slider is smooth.  2. The safety lancet according to claim 1, wherein the limiting mechanism comprises a first elastic washer and two second elastic washers;  The first elastic gasket is attached to an inner circumference of the sliding member away from the end of the needle, and the edge of the first elastic gasket is smoothly fitted to the inner wall of the sliding member;  Two of the second elastic gasket sleeves are affixed to the needle hub, and the second elastic gasket is configured to be used when the slider slides to completely shield the needle or the needle is completely exposed The first resilient washer is snapped to limit movement of the slider.  The safety lancet according to claim 1 or 2, wherein the limiting mechanism comprises an elastic fastener and two card slots; The two card slots are disposed on the needle seat, the elastic fastener is disposed on the sliding member, and the two card slots and the elastic fastener are used for sliding the slider to completely cover Needle or needle When fully exposed, it is engaged with the elastic fastener to limit the movement of the slider.  The safety lancet according to any one of claims 1 to 3, characterized in that the slider is provided with at least one anti-slip zone.  The safety lancet according to claim 3, wherein the sliding member is made of an elastic material, the sliding member is integrally formed with the elastic fastener, and the needle holder is integrated with the card slot. Forming, the sliding member is provided with a plurality of hollowed out areas.  6. A safety lancet according to at least one of claims 1 to 5, wherein the slider comprises a smooth end face, the extended face of the end face and the axis of the hub There is an angle of 5~10°.