CN102028481A - Safe pen type blood taking needle - Google Patents

Abstract

The invention relates to a safe pen type blood taking needle, comprising a sheath, an outer cylinder, a needle seat, a needle tube, a spring and a blood stopping sleeve, wherein the lower section of the needle seat is provided with a spring supporting platform, and the periphery of the needle seat is provided with a disc which is connected with the platform by utilizing a cross bridge; the inner edge of the disc is also provided with a pair of arc plain films protruding towards an axle center, and the outer edge of the disc is also provided with a pair of fins expanding downwards and outwards; the front end of the outer cylinder is provided with a conical head, an inner hole of the conical head is communicated with an intracavity of the outer cylinder, a pair of arc stand columns extending into the cylinder is arranged at the inner hole wall of the conical head facing towards the inner side of the cylinder, and an extroversion curling edge is arranged at the bottom of the stand columns; the inner wall of the lower section of the outer cylinder is provided with an annular protruding ridge; and the arc plain films can be embedded with the extroversion curling edge at the bottom of the arc stand columns so that the spring is compressed in the intracavity of the conical head by the needle seat. After blood-taking is completed, a blood taking tube is necessarily and deeply inserted, a cap stopper of the blood taking tube ensures that the arc fins and the arc plain films which are arranged at the lower section of the needle seat are expanded outwards to disengage the clamping of the extroversion curling edge, the needle seat is released, and the spring is returned to drive the needle seat and the needle tube to be shrunk into the cylinder. The annular protruding ridge at the lower section of the outer cylinder prevents the arc fins from sliding down so that the needle seat and the needle tube are hidden in the intracavity of the outer cylinder.

Description

A kind of pen type safety blood taking pin

(1) technical field

The present invention relates to a kind of pen type blood taking needle, a kind of specifically pen type blood taking needle with safe needle holder cooperates with vacuum test tube, is used for the gatherer process of venous blood specimen.

(2) background technology

People are used for correctly diagnosing the illness by various means collections, acquisition Human Physiology, pathological information; Wherein the collection to blood preparation has following three kinds of approach usually: (1), subcutaneous blood sampling are used for the simple and easy differential counting of blood constituent is detected more; Subcutaneous (the solid or prismatic) blood taking needles that use more; (2), venous blood collection, can carry out detailed detection to nosetiology in hematology, the blood and other related discipline indexs, in clinical, use very extensively, use pen type or split type vein blood taking needle more; (3), arterial blood drawing, how in critical emergency case, aterial blood gas indexes following is detected, use lessly, use the arterial blood drawing special syringe to gather more.Collection and check to blood preparation, its objective is by detection bacteriology, virological infection level in analyzing and testing, acquisition blood blood component and the blood of blood constituent, to understand Human Physiology and pathologic condition, or the effect after the understanding Drug therapy, and to advancing of disease, lapse to and judgement etc. is made in prognosis.

In venous blood collection, various countries clinical medical and nursing personnel, most pen type blood taking needle or split type vein blood taking needles of using; The present invention only relates to the blood sampling lancet device in the venous blood gatherer process.

The pen type blood taking needle: its structure is the needle tubing that connects, and all there is sharp cutting edge at its two ends; Hypomere is fixed on the needle stand in the needle tubing, and front end is called that venipuncture needle, rear end are called collection blood pin, collection blood wire surface has blood resistance unit, needle tubing two ends that protective casing (structure is seen accompanying drawing 1) is arranged.During use, blood taking needle spun is fixed on the needle holder outer cylinder front end, implements venipuncture, after the success, vacuum test tube is inserted needle holder rear end cavity, make collection blood pin rear end cutting edge pass blood resistance unit and run through and thrust the vacuum tube plug, under suction function, in blood suction blood taking tube; So repeatedly, can realize the collection of multitube time blood specimen; Blood sampling finishes, and extracts venipuncture needle, and local hemostasis to depleted blood taking needle, needs the nurse once more with blood taking needle front end sheath, is enclosed within the blood taking needle appearance again, rotates needle body then, and blood taking needle is taken off from needle holder, blood taking needle is discarded in the waste holder again; Nurse's both hands overlap process again in this operation, and owing to multiple reason, nurse's finger is usually easily stabbed by needle point, and needle stick injury takes place, and causes the infection or the propagation of blood borne disease, as hepatitis C, acquired immune deficiency syndrome (AIDS); Consequence is extremely serious.

Split type vein blood taking needle: its structure is on the flexible pipe tail end needle stand of venoclysis needle, connects a collection blood pin and constitutes (structure is seen accompanying drawing 2).It in use, also need the rotation of collection blood pin is fixed on the needle holder outer cylinder front end, hand-held venipuncture is implemented puncture at vein, after the success, vacuum test tube is inserted needle holder rear end cavity, make collection blood pin cutting edge pass blood resistance unit and thrust the vacuum tube plug, under suction function, blood is sucked blood taking tube.When needing, so repeatedly, can realize the multitube blood sampling; Blood sampling finishes, and extracts venipuncture needle, and local hemostasis is disposed depleted blood taking needle, needs nurse's hands to pinch collection blood pin needle stand appearance, rotates needle body then, and blood taking needle is taken off from needle holder, is discarded in the waste holder together with venipuncture needle; In the said process, because the blood sampling flexible pipe is longer, about 20 centimetres, the remaining blood in the venipuncture needle of front end and the flexible pipe, in the process that blood taking needle and flexible pipe take off, blood can trickle everywhere, contaminated environment or human body; At present, in clinical position, nurse and waste treatment personnel's finger also is very easy to be hindered by the blood taking needle spine, infects blood borne disease because of needle stick injury causes; Consequence is extremely serious.

Add up according to the American National medical department: the needle stick injury that occurs in injection puncture and blood collection procedure accounts for 26% of total injury incidence rate; Federal Government was issued " safety of acupuncture and prevention " bill in 2000: require medical institutions to be necessary for the employee safe medical apparatus is provided; U.S. National Institute Department of Health formulates blood source disease working standard: injection, puncture procedure rules, firmly stop: hands takes off syringe needle, bending syringe needle, from the broken needle head, overlap the behavior of syringe needle again.

China is because economy and historical reasons are to use the syringe puncture to gather or use the mode of above two kinds of blood taking needles collection more than clinical blood sampling is operated.According to China's medical statistics, scholarly journal report, the clinical care practitioner by the incidence rate of needle stick injury up to more than 80%.Endanger extremely serious.

In sum, clinical press for a kind of can be in above-mentioned blood collection procedure, can effectively avoid needle stick injury, eliminate the safe and reliable blood taking needle utensil of risk.Just at present, the domestic neither one of still not going back can be disclosed with the technical scheme of simple economy, practical safety.

(3) summary of the invention

The present invention is exactly the solution that proposes at the existing deficiency of above-mentioned venous blood collection process.Have safe, reliable, easy, practical, inexpensive, can simplify the clinical manipulation program, increase work efficiency, eliminate the characteristics of needle stick injury; Specifically, it is a kind of safety pen type blood taking needle that has needle holder, is used for the gatherer process of vacuum test tube to venous blood.

A kind of pen type safety blood taking of the present invention pin is realized by following scheme: a kind of pen type safety blood taking pin, form by urceolus, needle stand, spring, needle tubing, blood resistance unit, sheath; It is characterized in that: porose, the interior bonding needle tubing of needle stand central authorities, the needle stand hypomere has the spring support platform, its outer pocketed springs, the spring support platform links to each other with the disk inner edge that is positioned at its periphery by cross-bridges, the outstanding arc plain film in one subtend axle center is arranged, with the corresponding disk outer rim of arc plain film the arcuated fin piece of a pair of downward abduction is arranged with the vertical disk inner edge of cross-bridges.Front end at urceolus has conehead, and the conehead endoporus communicates with outer tube inner chamber, and the conehead endoporus dwindles in the port, forms a constriction step; On the outer cylinder front end wall of conehead basilar part, have two holes with the axle center symmetry, the arc column that axis is parallel and extend in tube is respectively arranged in inboard, two holes, the crimping of turning up is arranged at the column bottom; Urceolus hypomere inwall has the prominent ridge of an annular.

The edge, lower ending opening place of needle stand turns up and expands, and can be connected with blood resistance unit is nested; Needle tubing runs through needle stand goes forward side by side into blood resistance unit, use binding agent, bonding firmly tube wall and needle stand, the crimping that turns up of the arc column bottom of the arc plain film of needle stand middle and lower part and urceolus inside is chimeric mutually, make needle stand spring is compressed in the space of needle stand spring support platform and the formation of urceolus conehead endoporus; Sheath is sleeved on the puncture needle appearance, closely cooperates with outer cylinder front end conehead appearance.

Above structure has been formed a kind of pen type safety blood taking of the present invention pin.

During use, operate: take off the front end sheath, the row vein puncture with conventional venous blood acquisition method, after the success, vacuum test tube is inserted needle holder rear end cavity, make collection blood pin cutting edge pass blood resistance unit and thrust the vacuum tube plug, under suction function, with blood suction blood taking tube.

When blood sampling finishes (last blood taking tube collection finishes), blood taking tube is taken off together with urceolus, the vein local hemostasis.Method of disposal to the blood taking needle after using is: external, firmly vacuum test tube is inserted the needle holder urceolus once more, the extruding of blood taking tube helmet outer rim can make the arcuated fin piece pressurized of needle stand outer rim and the abduction expansion, makes the arc plain film break away from the restriction of the crimping that turns up of arc column; Spring is discharged in urceolus, expand, needle tubing is recovered to outer tube inner chamber rapidly.Needle point is shielded, eliminate medical personnel by the danger of needle stick injury.

Because the present invention has adopted needle holder and the incorporate structure of blood taking needle to make the present invention in use, no longer need the nurse in rule of operation, blood taking needle to be connected the installation that spins, to unscrew the process of taking off with the needle holder urceolus, reduce operation link, eliminated the risk of needle stick injury.

Since type of the present invention adopted outside needle stand pocketed springs and use the arc plain film and the arc column outside crimping form mutual locking, the structure that cooperates needle stand hypomere arc abduction fin, make after blood sampling finishes, the firmly dark once more triggering mode of inserting blood taking tube (definitely), arc abduction fin is outwards stretched, the arc plain film is outer simultaneously to be moved, break away from the arc column locking of crimping that turn up to the arc plain film, needle stand is discharged, discharge under the resilient force of back at spring, driving the automatic retraction of blood taking needle enters in the needle holder urceolus, has disposable use, automatically ruin type after the use, syringe needle retraction automatically enters urceolus and conductively-closed, eliminate medical personnel by the generation of needle stick injury, also can alleviate nurse's work, increase work efficiency.

(4) description of drawings

Accompanying drawing 1 is common pen type blood taking needle structural representation;

The split type vein blood taking needle structural representation that accompanying drawing 2 is traditional;

Accompanying drawing 3 is overall structure decomposing schematic representations of a kind of pen type safety blood taking of the present invention pin;

Accompanying drawing 4 is needle stand structural representations of a kind of pen type safety blood taking of the present invention pin;

Accompanying drawing 5 is blood resistance unit structural representations of a kind of pen type safety blood taking of the present invention pin;

Accompanying drawing 6 is a kind of pen type safety blood taking of the present invention pin outer tube structure sketch maps;

Accompanying drawing 7 is self-contained structural representations of a kind of pen type safety blood taking of the present invention pin;

Accompanying drawing 8 is view that needle tip retracts enters the outer tube inner chamber of needle holder after the use of a kind of pen type safety blood taking of the present invention pin;

(5) specific embodiment

Accompanying drawing 1 is traditional split type vein blood taking needle, its structure is the flexible pipe at venoclysis needle, among the figure, venipuncture needle A1 structure is identical with function and venoclysis needle, on the other end tail end Connection Block A4 of intravenous needle flexible pipe A3, be connected with a single-ended collection blood pin A5, the outer rim of this needle stand A5 has the spiral silking.In use, the rotation of collection blood pin need be fixed on the needle holder outer cylinder front end; This pin is in blood collection procedure, because blood taking needle connection flexible pipe is longer, and about 20 centimetres, remaining blood in the venipuncture needle of front end and the flexible pipe can not all suction be clean by vacuum tube, in the process that blood taking needle and flexible pipe take off, blood can trickle everywhere, contaminated environment or human body; Owing to multiple reason, nurse and waste treatment personnel's finger also Chang Yi is stabbed by needle point, has the needle stick injury risk, and consequence is extremely serious.

By accompanying drawing 2 as can be known, traditional pen type blood taking needle, its structure is a minute hand B who connects needle stand; Its two ends all have sharp cutting edge; The middle hypomere of needle tubing is bonded and fixed in the needle stand B1, and its front end (long end) has blood resistance unit B3, two ends that the protective casing protection is arranged for venipuncture needle B2, rear end (short end) for collection blood pin B4, collection blood wire surface in addition; During use, the blood taking needle rotation is fixed on needle holder C outer cylinder front end; To using the disposal of the depleted blood taking needle in back, process needs the nurse once more with blood taking needle front end sheath as described above, is enclosed within the blood taking needle appearance again, and needle body is unclamped in rotation then, and blood taking needle is taken off from needle holder, blood taking needle is discarded in the waste holder again; In this process because nurse's both hands overlap crossed work again, clinical in (can owing to multiple reason), make nurse's operation accident collision occur, cause nurse's finger to be stabbed by needle point, there is serious needle stick injury risk equally in the operation of pen type blood taking needle.

By accompanying drawing 3 as can be known, a kind of pen type safety blood taking of the present invention pin is made up of several lower parts: needle tubing 1, spring 2, needle stand 3, blood resistance unit 4, urceolus 5, sheath 6.

Accompanying drawing 4 is structural representations of a kind of pen type safety blood taking of the present invention pin needle stand.There is a through hole 3a front end center of needle stand 3, bonding needle tubing 1 in the hole; By accompanying drawing 4-1., accompanying drawing 4-2. with accompanying drawing 4-3. as can be known; At the middle hypomere of needle stand 3, there is a ring-type outstanding, be spring support platform 3c, in the outer rim of support platform 3c one ring-type square position 3g is arranged, connect with cross-bridges 3f between the two, the arc plain film 3d of subtend axle center stretching, extension is arranged with the vertical direction of cross-bridges 3f in the ring-type square position; In the outer rim of two arc plain film 3d, the arcuated fin piece 3e of a pair of abduction is downwards arranged; The lower end of needle stand has a perforate identical with the upper end perforate, and the edge of perforate is to turn up and expands 3b.

Accompanying drawing 5 is blood resistance unit structural representations of a kind of pen type safety blood taking of the present invention pin.Blood resistance unit 4 is cryptomere cast objects made from elastomeric material, and the outer rim expansion of its perforate upper end 4a thickens 4b ringwise.

Accompanying drawing 6 is outer tube structure sketch maps of a kind of pen type safety blood taking of the present invention pin: urceolus 5 rounded barrel-like structures, and its inner hollow, the outside crimping of urceolus lower edge forms the handle 5e that shakes hands, there is circular conehead the urceolus upper end, its central authorities are porose, and the aperture is reduced into 5a, communicate with outer tube inner chamber; On the urceolus lateral wall of conehead basilar part, have two hole 5b with the axle center symmetry, an arc column that extends in tube is respectively arranged in inboard, two holes, the column bottom has the crimping of turning up, urceolus hypomere inwall that the prominent ridge 5c of one annular is arranged; Hypomere inwall in urceolus has the prominent ridge 5d of an annular, and the ring internal diameter that prominent ridge forms is less than the urceolus internal diameter.All there is sharp cutting edge at the two ends of needle tubing 1, outside suit needle stand of needle tubing and cementation, and the first half needle tubing that exposes needle stand is called venipuncture needle, is 1a; The lower end is 1b for collection blood pin; The aperture of spring 2 is greater than the external diameter of needle stand 3, and the length of spring 2 is greater than the spacing of needle stand 3 spring support platforms to venipuncture needle 1a needle point.

Accompanying drawing 7 is overall structure sketch maps of a kind of pen type safety blood taking of the present invention pin; As seen from the figure: puncture needle tubing 1 is bonded in the needle stand 3, epimere is long slightly, be venipuncture needle 1a, it is short slightly that the hypomere of needle tubing exposes the part of needle stand, be collection blood pin 1b, the two length differs more than 1: 2, and the circular disk 3c of hypomere goes up bearing spring 2 in the needle stand 3,3b of portion and blood resistance unit 4 end 4a sockets are expanded in the lower end of needle stand, and blood resistance unit 4 will collect blood pin 1b and cover in the blister cavities fully; Needle stand 3 is positioned at the inner chamber epimere of urceolus 5, the a pair of arc plain film 3c that stretches to the axle center of the inner edge of the circular disk 3g of needle stand 3 is positioned at the chimeric locking of arc crimping 5c that arc column lower end that a pair of outside tube inner chamber of outer cylinder front end inwall perforate 5b inboard extends turns up; Thus, needle stand 3 is compressed in spring 2 in the space between needle stand and the urceolus conehead endoporus.The abduction arcuated fin piece 3e of the circular disk of hypomere in the needle stand 3, its outer rim is close to outer tube inner wall, and promptly two fin spacings equal the urceolus internal diameter; Fin arc inner edge dwindles gradually, is equaling blood taking tube bottle stopper outer radius, and a protruding change is arranged, and can make fin block the bottle stopper outer rim.There is sheath 6 outside of puncture needle 1, with the tight suit of conehead 5a of outer cylinder front end.

More than constitute the overall structure of a kind of pen type safety blood taking of the present invention pin.

Accompanying drawing 8 is that needle structure was ruined type, needle tubing and needle stand and retracted to the structural representation that is protected fully in the urceolus automatically after a kind of pen type safety blood taking of the present invention pin used; In conjunction with the accompanying drawings 7, accompanying drawing 8, when a kind of pen type safety blood taking pin of the present invention need use, pull up the sheath 6 of blood taking needle front end, according to the venipuncture routine, treating partly sterilised of puncture portion, tie up the vein tourniquet, hand-held safety blood taking pin urceolus 5 of the present invention, row vein puncture, wait to puncture successfully after, hold fixedly venipuncture needle 1a position of urceolus 5 (needle holder), an other hands is taken vacuum test tube, the plug end is inserted urceolus 5 tail end cavitys, and thumb is pressed the vacuum test tube bottom, and four refer to separately control urceolus crimping 5e, finger is firmly held mutually, vacuum test tube is inserted urceolus 5, make collection blood pin 1b puncture blood resistance unit and pass vacuum test tube front end plug, negative pressure of vacuum can enter vacuum test tube with the suction of vein blood vessel inner blood in the blood taking tube.After blood volume to be collected reaches requirement, extract blood taking tube; If desired, can above-mentioned repeatedly action, realize the collection of multitube venous blood.When treating that blood sampling finishes, it is slotting deeply in urceolus with vacuum test tube to exert oneself once more, the blood taking tube bottle stopper enters abduction fin depths, fin is fastened in the bottle stopper surface, and the arcuated fin piece 3e of needle stand 3 hypomere abductions outwards expanded, is shifted, needle stand is broken away from be positioned at the clamping down on of the crimping 5c that turns up, the i.e. releasing of the arc column lower end that outer tube inner chamber extends to turn up crimping 5c, needle stand is released the locking of arc-like sheet 3d entad on the needle stand circular disk; After extracting blood taking tube, at the active force of spring 2; Spring makes needle stand move to the urceolus lower end, drives needle tubing together to the inner retraction of urceolus.When arcuated fin piece runs into the prominent ridge 5d of the annular of urceolus 5 inwall hypomeres, be limited to this position, and can not continue to move down, simultaneously, the prominent ridge of annular is to the distance of the urceolus opening part length greater than needle stand hypomere collection blood pin, make needle stand 3 and collection blood pin 1b can not expose outside urceolus bottom outer rim, also make when blood taking tube is outwards extracted, can break away from the fastening force constraint between collection blood pin and the plug smoothly.Spring length is greater than the spacing of needle stand 3 spring support platform 3c to venipuncture needle point 1a; The prominent ridge 5d of annular to the distance between the urceolus conehead 5a greater than needle stand 3 arcuated fin pieces to the length between the venipuncture needle 1a; The prominent ridge 5d of wall circular is greater than needle stand 3 hypomere abduction arcuated fin piece 3e to the distance that collects blood resistance unit 4 lower ends outside the blood pin 1b to the distance at urceolus bottom end opening place in the urceolus hypomere.After above structure and condition had guaranteed that the needle tubing retraction enters in the urceolus, venipuncture needle point 1a and the outer blood resistance unit 4 of collection blood pin can not expose to outside the urceolus.

Claims (6)

1. a pen type safety blood taking pin is made up of sheath (6), needle tubing (1), spring (2), needle stand (3), blood resistance unit (4) and urceolus (5); It is characterized in that: bonding needle tubing (1) in needle stand (3) central authorities porose (3a), the needle stand hypomere has spring support platform (3c), its periphery pocketed springs (2), spring support platform (3c) links to each other with disk (3g) inner edge by a cross-bridges (3f), with the vertical disk of cross-bridges (3f) (3g) inner edge the outstanding arc plain film (3d) in one subtend axle center, the arcuated fin piece (3e) that disk (3g) outer rim has a pair of downward abduction is arranged.Outer cylinder front end has conehead, the conehead endoporus dwindles (5a) at opening part, this hole communicates with urceolus (5) inner chamber, corresponding perforate (5b) is arranged on the outer tube wall of conehead basilar part, there is the arc column that extends in the subtend tube perforate (5b) inboard, the column bottom has the crimping of turning up (5c), urceolus hypomere inwall that the prominent ridge (5d) of one annular is arranged.

2. according to the said a kind of pen type safety blood taking pin of claim 1, it is characterized in that: the hypomere of needle stand (3) has a spring support platform (3c), and platform diameter is slightly larger than spring (2) race diameter.

3. according to the said a kind of pen type safety blood taking pin of claim 1, it is characterized in that: the periphery of spring support platform (3c) that is arranged in the hypomere of needle stand (3) has a disk (3g), (3f) interconnects by a cross-bridges, disk (3g) inner edge perpendicular to cross-bridges (3f) has the outstanding arc plain film (3d) in a subtend axle center, perpendicular to outer rim in the disk of cross-bridges the arcuated fin piece (3e) of a pair of downward abduction is arranged, the diameter of arcuated fin piece equals the urceolus internal diameter.

4. according to the said a kind of pen type safety blood taking pin of claim 1, it is characterized in that: the front end of urceolus has conehead, conehead is porose and communicate with outer tube inner chamber, on conehead basilar part urceolus antetheca, a pair of perforate (5b) is arranged, the inboard of (5b) is to there being a pair of arc column that extends in tube in the hole, basilar part at the arc column has the crimping of turning up (5c), the bottom margin of urceolus turns up to form and holds handle (5e), urceolus hypomere inwall has the prominent ridge (5d) of an annular, and the ring internal diameter that prominent ridge (5d) forms is less than urceolus (5) internal diameter.

5. according to the said a kind of pen type safety blood taking pin of claim 1, its spy is characterised in that: the length of spring (2) greater than needle stand from spring support platform (3c) distance to venipuncture needle point (1a).

6. according to the said a kind of pen type safety blood taking pin of claim 1, it is characterized in that: the distance that the prominent ridge (5d) of wall circular is located to conehead bore openings (5a) in the urceolus hypomere arrives length between the needle tip (1a) greater than needle stand hypomere arcuated fin piece (3e) base.The prominent ridge (5d) of wall circular is greater than needle stand hypomere arcuated fin piece (3e) base to the distance that collects blood resistance unit lower end outside the blood pin to the distance at urceolus lower ending opening place in the urceolus hypomere.

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