CN105193480A - Bone marrow puncture needle - Google Patents

Abstract

The invention discloses a bone marrow puncture needle, comprising a needle body, a needle holder and a loose core, wherein the needle body is a pipe body, and the head of the needle body is an inclined needle tip; the head of the needle holder is connected with the tail part of the needle body, and the tail part of the needle holder is provided with a holder hole communicated with the needle body; the loose core extends into the needle body via the needle holder, and the head of the loose core is provided with an inclined sharp head with the same inclination as the inclined needle tip, and when the loose core is in a state of matching with the needle body, the inclined plane of the inclined sharp head and that of the inclined needle tip are coplanar, and meanwhile, the tail part of the loose core extends out of the tail part of the needle holder. According to the bone marrow puncture needle, the drain guiding capacity can be reliably ensured, and the blockage of a drain guiding passage of the needle body is not easily generated in a puncture process.

Description

Marrow puncture needle

Technical field

The present invention relates to a kind of marrow puncture needle.

Background technology

Marrow puncture needle and the common medical puncture needle of routine are similar, and principal character comprises one to follow cast needle body for the needle stand and be connected with such as syringe.Be fixedly connected with between needle stand with needle body, the cavity in needle stand is used for needle body and being communicated with such as between syringe.

Needle body is current mainly contains three kinds of structures, and a kind of structure is needle structure as shown in Figure 2, and visibly, the main body of needle body 1 is a pipe fitting, and tube head is chamfered formation needle point, this kind of needle body because of its structure simple, cost is low and become current the most frequently used a kind of needle body.But due to operations such as such as bone marrow aspirations, puncture needle is mainly used to drain, and the axis hole 14 in Fig. 2 is conduction holes, directly cut sth. askew due to its needle point needle body 1 that is tubulose and form, thus, the equivalent caliber of conduction hole is identical with the caliber of needle body 1.Drain ability is strong, but axis hole 14 and needle body edge have sharp cutting edge, have dissection to human body, and in practical operation, the when injected organism tissue that axis hole 14 is easily cut blocked.

For injection operation, blocking can't produce too much influence, and injecting the hydraulic coupling produced can rinse out the tamper of the mouth of pipe.But drain exactly can not meet the eliminating of mouth of pipe tamper.

In view of this, another kind of needle structure is as shown in Figure 1 found in the operations such as such as drain.Conduction hole in needle body shown in Fig. 1 mainly contains two kinds, can be used alone, also can compound use.One is needle point 13 is cone, and the needle point 13 of taper has two to three axial hole 12, for being communicated with pipe and drain site in needle body.Although wherein also there is dissection in axial hole 12, cutting edge is more blunt, usually can not cut away when injected organism tissue, therefore can not produce blocking.Although but having multiple axial hole 12, drain ability is relatively low.

Needle body 1 in FIG also has multiple radial hole, in other words side opening 11, for improving drain ability.Comparatively speaking, under having the condition in side opening 11 and axial hole 12, drain ability strengthens greatly simultaneously, but, should be appreciated that drain site is often smaller, side opening 11 along the axial array of needle body 1 has larger axial distribution, and the liquid of drain may includes the liquid of its hetero-organization.

No. CN104414691Ath, China patent document discloses a kind of marrow puncture needle, and its needle body front end is flush end, additionally, is provided with an acuminous nook closing member of band, for shutoff needle body front end, then opens side opening to carry out drain in front end.This kind of structure and the structure comparison shown in Fig. 1 similar, but the simple side opening that uses carries out drain, not only drain ability, and needs axially have certain distribution distance at needle body due to side opening, and drain point can not accurate perception.In addition, nook closing member coordinates needle body, and its front end has table top, causes the puncture ability of needle body to decline.

Summary of the invention

Therefore, under the object of the present invention is to provide a kind of condition stronger in guarantee puncture ability, drain ability also by the marrow puncture needle of Reliable guarantee, and can be not easy the blocking producing needle body drainage channel in piercing process.

The present invention is by the following technical solutions:

A kind of marrow puncture needle, comprising:

Needle body is body, and head is oblique needle point;

Needle stand, the head of this needle stand connects the afterbody of described needle body, and the afterbody of this needle stand then has the bore be communicated with needle body; And

Loose core, this is loosed core and probes into needle body via described needle stand, and this head of loosing core has the oblique tip identical with described oblique needle point gradient, and when loosing core with needle body mated condition, the inclined-plane of oblique tip and the inclined-plane of oblique needle point coplanar, meanwhile, this afterbody of loosing core leans out from the afterbody of needle stand.

Above-mentioned marrow puncture needle, in certain embodiments, described in loose core and comprise the end head with described oblique tip and the core bar being connected this end head;

Wherein, end head is that polygon prism structure or side are provided with along the through slot axially arranged of loosing core;

Core bar then and in needle body leaves gap between pipe, for through slot or multiple edge body structure and the fit clearance of pipe in core bar and being communicated with of bore.

Preferably, described core bar is polygon prism structure.

Alternatively, described polygon prism structure is positive six prism structures, and core bar cross section is less than end head tail end cross section;

Wherein, the interior pipe of needle body is connected in the tail end of end head.

Alternatively, also comprise a sealing cap, this sealing cap has centre bore, and this sealing cap have coordinate with described bore probe into portion, and make centre bore and bore coaxial line;

Described core bar leans out via described centre bore;

The diameter of centre bore is less than the diameter of pipe in needle body.

Alternatively, described sealing cap has one for holding the outer hoop of needle stand afterbody.

Alternatively, the afterbody of described sealing cap is a flange, and this flange is held by described outer hoop.

Alternatively, the head end of described centre bore has a counterbore, and the internal diameter of this counterbore is identical with the inner tube diameter of needle body.

Alternatively, be provided with ventilative water suction and consider cover in described head counterbore, the internal diameter of this water suction worry cover is identical with the diameter of core bar or external radius of a circle.

Alternatively, the tail end of the centre bore of described sealing cap has tail counterbore;

The tail end of described core bar is provided with an end socket coordinated with the hermetic seal of described tail counterbore.

In some preferred embodiments, described needle body comprises front needle body and rear needle body;

Wherein, front needle body is the body of rigidity, and the afterbody side of this front needle body is provided with lever, and tail end is provided with front pipe joint;

Rear needle body is transparent tube body, and the head end of this rear needle body is provided with the rear pipe joint mating with described pipe joint and be connected.

According to marrow puncture needle of the present invention, for needle body configuration is loosed core, during production, loosing core to coordinate with needle body together encapsulates, and during use, open encapsulation and puncture, after puncture, extraction is loosed core, connection needle stand and drainage device.Due to the existence of loosing core, the blocking of pipe in needle body can not be produced in piercing process, and comparatively speaking, the needle body axis hole through-current capability with oblique needle point is strong, thus drain ability can by reliable guarantee.

Accompanying drawing explanation

Fig. 1 is known a kind of needle structure schematic diagram.

Fig. 2 is known the most frequently used a kind of needle structure schematic diagram.

Fig. 3 is the incomplete decomposing schematic diagram according to a kind of marrow puncture needle of the present invention.

Fig. 4 is loosed core and the schematic cross-sectional view of needle body fit structure part.

Fig. 5 is a kind of needle head structure schematic diagram.

Fig. 6 is a kind of structural representation of a direction of sealing cap.

Fig. 7 is another the direction structure schematic diagram corresponding to Fig. 6.

Fig. 8 is a kind of pulled core structure schematic diagram.

Fig. 9 is a kind of assembled needle structure schematic diagram.

Figure 10 is assembled needle structure explosive view.

In figure: 1. needle body, 11. side openings, 12. axial hole, 13. needle points, 14. axis holes, 15. oblique needle points, 16. bodys, needle body after 17., needle tube body after 171., joint after 172., 173. connect hole, needle body before 18., 181. front connectors, needle tube body before 182., 183. levers.

2. needle stand, 21. connecting portions, 22. flanges, 23. bore, 24. pedestals.

3. sealing cap, 31. counterbores, 32. via holes, 33. probe into portion, 34. clamp grooves, 35. outer hoops, 36. tail counterbores.

4. loose core, 41. oblique tips, 42. end head, 43. core bars, 44. end sockets, 45. draw rings.

5. gas channel.

Detailed description of the invention

Should be appreciated that in puncture needle technical field, the one end at needle point 13 place of puncture needle is head end, and also referred to as front end, relative one end is called tail end, also can be called seat end or rear end.In view of end to end known by those skilled in the art, therefore, in orientation, use the position distinguishing puncture needle axis end to end.

Should be appreciated that the interior pipe of puncture needle is all pipe usually.

Should be appreciated that puncture needle not necessarily straight tube structure, but it axially can not be misunderstood because of non-straight tube structure, axis can be curve, the axis of such as urban pipe network.

Be widely used in medical field a lot of year about oblique needle point 15, it substantially connects head and is found in Fig. 2, and be that body is cut sth. askew and formed, the inclined-plane of oblique needle point 15 is also known as domatic, and cutting edge is sharp, thus is widely used in medical field and is used for puncture.But head is sharp-pointed, the sharp meeting of cutting edge produces cutting to tissue, uses this type of puncture needle, easily causes its axis hole 14 blocked.

See a kind of marrow puncture needle shown in Figure of description 3, its entire length is at 15cm ~ 20cm usually, is called as syringe needle in some applications on the whole, and its afterbody is used for being connected with other drainage devices, such as injector syringe, medical collection vacuum tube etc.See Figure of description 3, its basic structure comprises needle body 1, needle stand 2 and looses core 4.Correspondingly, if drainage device is for gathering vacuum tube, then needle stand 2 should be furnished with perforator, such as puncture needle.

Wherein about described needle body 1, see Figure of description 5, in certain embodiments, the entirety of needle body 1 adopts rigidity body, and be generally stainless pipe structure, in some high-quality puncture needles, needle body 1 adopts Nitinol pipe.

In order to meet good drain ability, see Figure of description 5, the head of needle body 1 is oblique needle point 15, and also show oblique needle point 15 in Fig. 2, figure and cut sth. askew for body and form, the deburring of cutting edge edge, to ensure puncture ability.

Oblique needle point 15 can not change the through-current capability of axis hole 14, thus has good drain ability, but has and have good cutting power with oblique needle point 15, under satisfied puncture rapidly condition, has and a certain amount ofly organizes cut, thus cause blocking drainage channel.

Following puncture needle structure, for ensure the smoothness meeting puncture condition under, can not be too much cut away tissue, and the problem causing drainage channel blocked.

About needle stand 2, lid needle stand 2 is structural portion of puncture needle and other equipment connections, is that needle stand 2 configures different syndetons according to the difference of drainage device.Due in the present invention, needle stand 2 demand fulfillment loose core 4 extraction, therefore, it should contain a hole, for be communicated with in needle body 1 manage.

In view of this, see Figure of description 5, the head of described needle stand 2 connects the afterbody of described needle body 1, Ying Zhi, and this kind of connection is the routine connection of this area, does not repeat them here.

Wherein the afterbody of this needle stand 2 then has the bore 23 be communicated with needle body.

Should be appreciated that the title of bore 23 just for distinguishing other holes, its title does not have specific restriction.

As previously mentioned, needle stand 2 can be used for being connected with such as syringe, and also can be connected with collection vacuum tube, its structure is different, but inevitably all must have runner, hole structure in other words, therefore, has the space of 4 devices of loosing core.

And then as shown in Figure 8, in figure, loose core 4 main body be a shaft, the body 16(being analogous to needle body 1 sees Fig. 5).4 are loosed core about described, this is loosed core and 4 probes into needle body via described needle stand 2, and this loose core 4 head there is the oblique tip 41 identical with described oblique needle point 15 gradient, and loose core 4 with needle body 1 mated condition time, the inclined-plane of oblique tip 41 and the inclined-plane of oblique needle point 15 coplanar, namely loose core and 4 to coordinate with needle body 1, still maintain good puncture ability.

Meanwhile, this loose core 4 afterbody lean out from the afterbody of needle stand 2, the part leant out, is positioned at operator and will looses core 4 extractions.

Based on said structure, because oblique needle point 15 is coplanar with oblique tip 41, make the inner cutter hole of oblique needle point 15, the edge of axis hole 14 is weakened in other words, the outer of simple oblique needle point 15 can not produce ring-type cutting structure, thus, consequent cut down organize less or do not have.

After puncture, 4 extractions of loosing core, connect needle stand in drainage device, can carry out drainage procedure, whole operating process is very convenient.

In certain embodiments, loose core 4 main body can be outside the part except oblique tip 41 and tail structure, be the column of cross section homogenizing, the interior pipe of column and body 16 can adopt matched in clearance.

Should be appreciated that matched in clearance belongs to the one of machinery cooperation, do not represent to there is gap between two parts that generation coordinates, but the relation of tolerance range.Under this structural condition, because frictional force is little, be conducive to loosing core 4 with the assembling of body 16 and extraction.

In addition, condition declivity needle point 15 can form good end face with the inclined-plane of oblique tip 41 under such configuration, does not affect puncture ability, and the dissection produced reduces.

This structure can produce swabbing action when loosing core 4 extraction, before not connecting drainage device, may produce pollution.

Therefore, in certain embodiments, loose core 4 and body 16 interior pipe between leave gap, this gap is different from the matched in clearance of mechanical field, does not belong to the relation of tolerance range.

Gap is used for through-flow air, thus when loosing core 4 extraction, does not produce swabbing action, and to cause before liquid carrying by drain out.

But under the condition of 4 stiffness by itself deficiencies that what the existence in gap made loose core, by the impact of puncture pressure, oblique tip 41 can not keep coplanar with the inclined-plane of oblique needle point 15, can produce certain dissection.

Therefore, the structure that arranges in gap needs to take into full account.

In certain embodiments, loose core 4 agent structure be regular prism structure, such as triangular prism, quadrangular ... eight prisms, loose core 4 inner face be regular polygon, the interior pipe of body 16 is circular, the circumscribed circle of this circle formation regular polygon, produce supporting role, when having gas channel 5, loose core 4 be not easy because of puncture pressure produce deflection, and ensure puncture normally carry out the restriction with cutting power.

Particularly, see Figure of description 4, loose core 4, essence is the sectional view of core bar 43 part in Fig. 8, loose core in figure 4 core bar 43 be positive six prism structures, the section constitution of the interior pipe of needle body 1 is loosed core the circumscribed circle in 4 cross sections herein, visible in figure, gas channel 5 is by Reliable guarantee.

In addition, during due to puncture, body fluid also has certain pressure, if keep the unimpeded of gas channel 5 on the whole in piercing process, still have body fluid and enter into gas channel 5, and pollution looses core 4, therefore, in the configuration shown in fig. 8, loose core 4 tail end an end socket 44 can be set, to keep the air-tightness of gas channel 5 in piercing process, that is when oblique tip 41 is with oblique needle point 15 coplanar, end socket 44 can block gas channel 5 just, keep air-tightness, in other words, now have certain intrinsic pressure in gas channel 5, opposed body hydraulic coupling, and too much the entering in gas channel 5 of body fluid can not be made.

And loose core in the process of 4 at pull, because the axial length of end socket 44 is smaller, after pulling out certain length, gas channel 5 is through, so loose core 4 suction (being configured to the situation of piston) eliminate.

As shown in Figure 8, loose core 4 as previously mentioned, core bar 43 and oblique tip 41 can be that the body of rod in homogenizing cross section processes on the whole.

In certain embodiments, adopt multi-segmental structure, loosing core namely 4 comprises the end head 42 with described oblique tip 41 and the core bar 43 being connected this end head 42, and each sections adopts different cross section specifications.

Wherein, preferably, end head 42 is polygon prism structure, and in order to first to ensure the through-flow structure of end head 42, the basic cross section of end head 42 is circular in certain embodiments, and side is provided with along 4 through slots axially arranged of loosing core, in order to form gas channel 5.

As shown in Figure 4, in core bar 43 and needle body 1, between pipe, leave gap, such as, gas channel 5 shown in Fig. 4 or the gas channel 5 of other versions, for through slot or multiple edge body structure and the fit clearance of pipe in core bar and being communicated with of bore 23.

When core bar 43 cross section is less than the cross section of the end head 42 of oblique tip 41, core bar 43 can adopt column structure.

In certain embodiments, as shown in Figure 8, described core bar 43 is polygon prism structure, easily process, and through-flow characteristic is better.

Through overtesting, when finding that described polygon prism structure is positive six prism structure, can under in guarantee, gas channel 5 have the condition of good through-flow characteristic, loosing core 4 still has good rigidity.

Further, and core bar 43 cross section is less than end head 42 tail end cross section, for other structural allocation, and such as hereafter mentioned sealing cap 3.

Wherein, in the tail end of end head 42, be connected to the interior pipe of needle body 1, form state as shown in Figure 4.

Based on aforesaid structure, when loosing core 4 extraction, the existence of gas channel 5 can not produce piston effect, thus the situation that the pollution before can effectively avoiding drainage device to connect produces.

As shown in Figure 3, in a preferred embodiment, described marrow puncture needle is also furnished with a sealing cap 3, and this sealing cap 3 has centre bore, and as shown in Figure 6 and Figure 7, centre bore is a more piece sector hole, is divided into three parts, i.e. head counterbore 31, via hole 32 and tail counterbore 36.

What first need guarantee is that this sealing cap 3 has the portion that probes into 33 coordinated with described bore 23, this probes into portion 33 for cylindrical surface structure, coordinate with the inner cylinder face of bore 23, sealing cap 3 material is preferably medical grade rubber, self has elasticity, and its external diameter probeing into portion 33 slightly larger than the internal diameter of bore 23, thus can form good cooperation, thus make centre bore and bore 23 coaxial line, be beneficial to loose core 4 assembling.

And then described core bar 43 leans out via described centre bore, thus, be beneficial to loose core 4 extraction.

Further, the diameter of centre bore is less than the diameter of pipe in needle body 1, and like this, when loosing core 4 extraction, core bar 43 can be extracted out smoothly, and end head 42 is then stopped, then disassembles sealing cap 3, looses core 4 together to receive as medical waste with sealing cap 3.

In a preferred embodiment, such as, shown in Fig. 6, described sealing cap 3 has one for holding the outer hoop 35 of needle stand 2 afterbody, and sealing cap 3 can be fixed on needle stand 2 reliably, unlikelyly comes off.

Preferably, the afterbody of described sealing cap 3 is a flange 22, and this flange 22 is held by described outer hoop 35, and the existence of flange 22, is conducive to the operation of needle stand 2, and meanwhile, flange 22 was also conducive to dismantling sealing cap 3 with coordinating of outer hoop 35.

In a preferred embodiment, the head end of described centre bore has a counterbore 31, and the internal diameter of this counterbore 31 is identical with the inner tube diameter of needle body 1.

To should be appreciated that due to counterbore therefore, when the internal diameter about centre bore describes, should be as the criterion to datum hole, the via hole 32 namely shown in Fig. 6, counterbore is used for the accommodating of other structure divisions at mechanical field not as datum hole use.

The existence of head counterbore 31, is conducive to end head 42 fixing in sealing cap 3, thus together processes as medical waste.

Further, be provided with ventilative water suction in described head counterbore 31 and consider cover, diameter or the external radius of a circle of the internal diameter that this water suction worry is overlapped and core bar 43 are identical, water suction is considered cover and is generally the fluffy material of lightweight, such as sponge, lightweight, fluffy, and there is good breathability, including in of end head 42 and being communicated with of gas channel 5 can not be affected.

Cover is considered in water suction can sponge a small amount of body fluid that end head 42 adheres to, and avoids dripping.

Preferably, the tail end of the centre bore of described sealing cap 3 has tail counterbore 36, and what match with tail counterbore 36 is end socket 44, and as shown in Figure 8, the tail end of described core bar 43 is provided with an end socket 44 coordinated with the hermetic seal of described tail counterbore 36, forms the front shutoff of puncture reliably.

In order to be conducive to operation, being also provided with at the tail end of end socket 44 and gripping or other are conducive to manually operated structure.Draw ring 45 such as shown in Fig. 8.

Draw ring 45 can also replace with plates, and plates arrange annular knurl, to improve frictional force, facilitates finger to grip.

In practical operation, bone marrow sampling quantity does not need too much, and elongated needle body 1 normally stainless steel, cannot observe the amount entered in needle body 1 intuitively.

According to transparent material, its intensity has the requirement that cannot meet needle body 1.

In view of this, in a preferred embodiment, as Fig. 9 and 10, needle body 1 is configured to compound needle body, its main body comprises two parts, i.e. front needle body 18 and rear needle body 17.

Wherein, front needle body 18 is the body of rigidity, for ensureing enough rigidity and puncture ability, usually as conventional puncture needle, adopting stainless steel, can also adopt nickel-base alloy in certain embodiments.

By with this understanding, the material that rear split 17 can adopt material softer, in order to the operability of satisfied puncture, the afterbody side of this front needle body 18 is provided with lever 183, as shown in Figure 10.

For realizing being connected with the coupling of rear needle body, the tail end of front needle body 18 is provided with front pipe joint.

Then needle body 17 adopts transparent tube body, is generally silica gel tube, or other rubber hose for medicals, and the head end of this rear needle body 17 is provided with the rear pipe joint mating with described pipe joint and be connected.

About the length of needle tube body 182 before front needle body 18, only need to consider paracentesis depth and operation window, therefore, generally speaking, relative to existing puncture needle, the length according to the needle body 1 of the puncture needle of combination type needle body can not be elongated significantly.

Claims (11)

1. a marrow puncture needle, is characterized in that, comprising:

Needle body (1) is body, and head is oblique needle point (15);

Needle stand (2), the head of this needle stand (2) connects the afterbody of described needle body (1), and the afterbody of this needle stand (2) then has the bore (23) be communicated with needle body; And

Loose core (4), this is loosed core, and (4) probe into needle body via described needle stand, and this head of loosing core (4) has the oblique tip (41) identical with described oblique needle point (15) gradient, and loose core (4) and needle body (1) mated condition time, the inclined-plane of oblique tip (41) and the inclined-plane of oblique needle point (15) coplanar, meanwhile, the afterbody of these loose core (4) leans out from the afterbody of needle stand (2).

2. marrow puncture needle according to claim 1, is characterized in that, described in loose core (4) comprise the end head (42) with described oblique tip (41) and the core bar (43) being connected this end head (42);

Wherein, end head (42) is provided with the through slot axially arranged along loose core (4) for polygon prism structure or side;

Core bar (43) then and between needle body (1) interior pipe leaves gap, for through slot or multiple edge body structure and the fit clearance of pipe in core bar and being communicated with of bore (23).

3. marrow puncture needle according to claim 2, is characterized in that, described core bar (43) is polygon prism structure.

4. marrow puncture needle according to claim 3, is characterized in that, described polygon prism structure is positive six prism structures, and core bar (43) cross section is less than end head (42) tail end cross section;

Wherein, the interior pipe of needle body (1) is connected in the tail end of end head (42).

5. marrow puncture needle according to claim 4, it is characterized in that, also comprise a sealing cap (3), this sealing cap (3) has centre bore, and this sealing cap (3) has the portion that probes into (33) coordinated with described bore (23), and make centre bore and bore (23) coaxial line;

Described core bar (43) leans out via described centre bore;

The diameter of centre bore is less than the diameter of needle body (1) interior pipe.

6. marrow puncture needle according to claim 5, is characterized in that, described sealing cap (3) has one for holding the outer hoop (35) of needle stand (2) afterbody.

7. marrow puncture needle according to claim 6, is characterized in that, the afterbody of described sealing cap (3) is a flange (22), and this flange (22) is held by described outer hoop (35).

8., according to the arbitrary described marrow puncture needle of claim 5-7, it is characterized in that, the head end of described centre bore has a counterbore (31), and the internal diameter of this counterbore (31) is identical with the inner tube diameter of needle body (1).

9. marrow puncture needle according to claim 8, is characterized in that, is provided with ventilative water suction and considers cover in described head counterbore (31), and the internal diameter of this water suction worry cover is identical with the diameter of core bar (43) or external radius of a circle.

10., according to the arbitrary described marrow puncture needle of claim 5-7, it is characterized in that, the tail end of the centre bore of described sealing cap (3) has tail counterbore (36);

The tail end of described core bar (43) is provided with an end socket (44) coordinated with the hermetic seal of described tail counterbore (36).

11. according to the arbitrary described marrow puncture needle of claim 1-7, and it is characterized in that, described needle body (1) comprises front needle body (18) and rear needle body (17);

Wherein, the body that front needle body (18) is rigidity, and the afterbody side of this front needle body (18) is provided with lever (183), and tail end is provided with front pipe joint;

Rear needle body (17) is transparent tube body, and the head end of this rear needle body (17) is provided with the rear pipe joint mating with described pipe joint and be connected.