CN105013044A - One-way valve type retaining needle - Google Patents

One-way valve type retaining needle Download PDF

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Publication number
CN105013044A
CN105013044A CN 201510459936 CN201510459936A CN105013044A CN 105013044 A CN105013044 A CN 105013044A CN 201510459936 CN201510459936 CN 201510459936 CN 201510459936 A CN201510459936 A CN 201510459936A CN 105013044 A CN105013044 A CN 105013044A
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CN
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needle
hose
way valve
protective
formula
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CN 201510459936
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Chinese (zh)
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CN105013044B (en )
Inventor
杨慧玲
牛迎花
高晶
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西安交通大学第一附属医院
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Abstract

The invention discloses a one-way valve type retaining needle. The one-way valve type retaining needle comprises a hose and a steel needle body coaxially arranged in the hose; an opening in the end of the hose is obliquely arranged to form an oval end face, a seal membrane is arranged on the oval end face in a sealing mode, a gap is formed in the middle of the seal membrane in the direction of the long axis of the seal membrane, and the arrangement of the gap meets the conditions that when liquid with certain pressure is contained in the hose, the gap is opened, the liquid flows into a blood vessel from the gap, and when the pressure in the hose disappears, the gap is closed. According to the one-way valve type retaining needle, blood returning thrombus and hose blocking can be avoided, and operation is convenient.

Description

单向瓣膜式留置针 Way valve indwelling needle of formula

技术领域 FIELD

[0001] 本发明属于医疗器械技术领域,具体涉及单向瓣膜式留置针。 [0001] The present invention belongs to the technical field of medical devices, particularly catheter-type directed way valve.

背景技术 Background technique

[0002]留置针在临床上广泛使用,但普通静脉留置针由于多种原因易导致堵管的发生,从而缩短了留置时间,在一定程度上降低了留置针的使用价值;增加了患者痛苦及经济负担,甚至影响了正常治疗的顺利进行;为静脉炎、血栓的发生埋下隐患。 [0002] indwelling needle is widely used clinically, but the average number of reasons intravenous catheter easily lead to plugging, shortening the dwell time, reducing the value of the indwelling needle is used to some extent; and increase the suffering of patients economic burden, and even affect the smooth progress of the normal treatment; as phlebitis, thrombosis lay hidden.

[0003] 普通留置针均采用导管前端圆形的开口,因此开口为持续开放状态,容易造成血液返流而堵塞导管,即使目前已不断的规范封管方法或使用正压接头等来进行预防堵管的发生,但如果患者穿刺侧肢体弯曲或用力时可使血管内压力增大致使血液返流。 [0003] Normal use of the indwelling needle are circular distal opening of the catheter, thus opening the open state is continued, likely to cause reflux of blood clogging of the catheter, even if the specification has been continuously sealed tube method or using positive-pressure connector or the like for prevention block generating tube, but the resulting increase in pressure within the blood vessels regurgitation if the patient puncture force or bending limbs.

发明内容 SUMMARY

[0004] 针对上述现有技术的不足,本发明提供了一种避免出现回血血栓及堵管、且方便操作的单向瓣膜式留置针。 [0004] For the above-described deficiencies of the prior art, the present invention provides a return of blood to avoid plugging and thrombosis occurs, and easy to operate one-way valve type catheter.

[0005] 为解决上述技术问题,本发明采用如下技术方案,单向瓣膜式留置针,包括软管和钢针,钢针同轴设置于软管内,软管端部的开口倾斜设置,以形成一椭圆形端面,椭圆形端面上密封设置有密封膜,密封膜的中间位置上沿其长轴方向开设有一缝隙,缝隙的设定满足:当软管内有一定压力的液体时,缝隙打开,液体由缝隙流入血管内,当软管内压力消失时,缝隙关闭。 [0005] To solve the above problems, the present invention adopts the following technical solution, indwelling needle way valve type, comprising a hose and a needle, needle coaxially disposed within the hose, the hose end opening portion inclined to forming an elliptical end face, the end face of an elliptical seal provided with a sealing membrane, defines an intermediate position along the longitudinal direction of the sealing film has a gap, the gap is set to satisfy: when a certain fluid pressure within the hose, the slit opening the liquid flows into the vessel by a gap, the inner hose when the pressure disappears, the slit closed.

[0006] 进一步地,该密封膜位于缝隙两侧的部分的厚度比其他部分的厚度薄。 [0006] Further, on both sides of the slit portion of the thickness of the sealing film thickness is thinner than other portions.

[0007] 进一步地,该椭圆形端面与软管管壁的夹角为α,夹角α的角度范围为40〜45度。 [0007] Further, the angle between the end surface of the elliptical tube wall is an angular range [alpha], [alpha] angle of 40~45 degrees.

[0008] 进一步地,该钢针的头部可拆卸安装有保护帽。 [0008] Further, the head portion of the needle protective cap is detachably attached.

[0009] 进一步地,该保护帽的顶部还连接有尾丝。 [0009] Further, the top of the protective cap is also connected to the end of wire.

[0010] 进一步地,该软管的尾部一体式连接有套管座,套管座的下端可拆卸连接有保护套,套管座的侧壁上设置有与其内腔相连通的延长管;套管座内设置有密封塞,钢针4的尾部穿过密封塞固定安装在位于保护套内的固定件上。 [0010] Further, the tail of the hose is integrally connected to the cannula hub, the lower end of the cannula is detachably connected to a seat protective cover, is provided with a lumen in communication with its extension pipe on the side wall of the sleeve holder; sleeve the inner tube is provided with a sealing plug holder, needle tail plug 4 through the sealing member fixedly mounted on the fixing of the protective jacket.

[0011] 进一步地,该套管座下端部的管壁沿其长度方向开有“F”形槽,“F”形槽包括横向固定部和竖向滑动部,保护套的前端部设置有头端,头端设置有与“F”形槽相配合的突起,“F”形槽的长度满足以下条件:通过调整突起在“F”形槽上不同横向固定部的位置,能带动钢针上下移动,进而使钢针的头部由缝隙伸出或缩回。 [0011] Further, the lower end wall of the sleeve portion seat along the longitudinal direction of the opening "F" shaped groove, "F" shaped groove comprises a lateral and vertical sliding portion fixed portion, the distal end portion of the protective sleeve is provided with a head end, the head end is provided with a groove-shaped projection cooperating "F", the length "F" shaped groove satisfies the following conditions: by adjusting the projection position in different transverse groove-shaped fixing portion "F", can drive the needle up and down moving the head further extension or retraction of the needle slot.

[0012] 进一步地,该固定件固定安装在保护套内。 [0012] Further, the fixing member is fixedly mounted in a protective sleeve.

[0013] 进一步地,该固定件可移动设置在所述保护套内,所述固定件上固定连接有柄翼,所述保护套上沿其长度方向开设有导向槽,所述柄翼位于导向槽内并沿其走向上下移动;所述保护套、导向槽的长度满足以下条件:所述柄翼在导向槽内向下移动时,能带动钢针的头部缩进保护套内。 [0013] Further, the fixing member is movable in the protection sleeve, a fixed member fixed to said handle flap is connected to the protective guide sleeve defines a groove along its length, the handle is located in the guide flap and along the groove to move up and down; the protective sheath, the length of the guide groove satisfy the following condition: when the handle flap is moved downward in the guide groove, the needle can be retracted to drive the head protective sheath.

[0014] 本发明单向瓣膜式留置针具有如下优点:1.软管的端部由密封膜密封,且开设有一缝隙,输液时,在液体的压力下,缝隙打开,输液结束后,缝隙关闭,避免了血液倒流入软管,避免了留置针堵管、静脉炎、血栓等的发生。 [0014] Formula way valve indwelling needle of the present invention has the following advantages: 1. The end of the hose is sealed by a sealing film, and defines a gap, infusion, liquid under pressure, the slit is opened, after the infusion, to close the gap , to avoid the reverse flow of blood tube, a catheter to avoid plugging, phlebitis, thrombosis occurs. 2.缝隙两侧的密封膜额厚度壁较薄,在进行输液时,在外界压力的作用下,易于缝隙打开,应形成输液通道。 The amount of the sealing film thickness of the wall on both sides of the slit 2 is thinner, during infusion, under the effect of outside pressure, the slit opens easily, should form the infusion passage. 3.软管端部的开口倾斜设置,增加了软管的流线型,减少了血管内血流的阻力和对血管壁的摩擦。 3. The inclined opening end of the hose, the hose increases streamlined, reducing blood flow resistance in the vessel wall and the friction. 4.钢针的端部的尖锐处套有保护帽,防止钢针在穿过缝隙时,将瓣膜的边缘划伤。 At the sharp end of the sleeve 4. A needle with a protective cap to prevent the needle when passing through the slit, the edges of the valve scratch. 5.保护帽的顶端设置有尾丝,当需要去除保护帽时,医护人员直接牵拉尾丝,即可去除保护帽,避免了污染。 The top of the protective cap is provided with a tail wire, when necessary to remove the protective cap, pulling tail wire staff directly, the protective cap can be removed, to avoid contamination. 6.提高了留置针的使用价值和患者依从性。 6. Increase the value and compliance of the patient catheter. 7.设置有保护套,在拔出钢针时,使钢针缩进保护套内,避免刺伤医护人员。 7 is provided with a protective cover, when removing the needle in the needle retracted protective sheath, to avoid health care workers hurt.

附图说明 BRIEF DESCRIPTION

[0015] 图1是本发明单向瓣膜式留置针的结构示意图; [0015] FIG. 1 is a schematic way valve formula indwelling needle of the present invention;

[0016] 图2是本发明单向瓣膜式留置针钢针穿过缝隙的示意图; [0016] FIG. 2 is a way valve of the present invention of formula indwelling needle through the needle slot schematic;

[0017]图3是本发明单向瓣膜式留置针软管的侧视图; [0017] The present invention FIG 3 is a side view of the indwelling needle of formula way valve hose;

[0018]图4是本发明中软管与保护套的结构示意图; [0018] FIG. 4 is a structural diagram of the present invention, the protective sheath of the hose;

[0019] 其中:1.软管;2.密封膜;3.保护帽;4.钢针;5.尾丝;6.延长管;7.保护套;8.柄翼;9.套管座;10.密封塞;11头端;12.“F”形槽;13.突起;14.固定件;15.导向槽。 [0019] wherein: a hose; 2 sealing film; protective cap 3; needle 4; 5 wire; extension pipe 6; 7 protective sheath; handle flap 8; 9 cannula hub........ ;. a sealing plug 10; terminal 11;. 12 "F" shaped groove;. protrusions 13; 14 holder; 15 guide groove.

具体实施方式 detailed description

[0020] 如图1和图2所示,本发明单向瓣膜式留置针,包括软管I和钢针4,钢针4同轴设置于软管I内,软管I端部的开口倾斜设置,以形成一椭圆形端面,椭圆形端面上密封设置有密封膜2,密封膜2的中间位置上沿其长轴方向开设有一缝隙2-1,缝隙2-1的设定满足:当软管I内有一定压力的液体时,缝隙2-1打开,液体由缝隙2-1流入血管内,当软管I内压力消失时,缝隙2-1关闭。 [0020] FIGS. 1 and 2, the check valve type indwelling needle of the present invention, comprising a hose 4 I and needle, needle 4 disposed coaxially within the hose I, the opening end portion of the inclined tube I arranged to form an oval-shaped end surface, the end surface of the elliptical seal provided with a sealing film 2, the sealing film 2 on an intermediate position along the longitudinal direction defines a slit 2-1, the gap is set to satisfy the 2-1: when the soft when the liquid pressure in the pipe has some I, the slit 2-1 is opened, the liquid flows from the intravascular slit 2-1, when the pressure inside the hose I disappear, close the gap 2-1. 软管I端部的开口倾斜设置,保证了缝隙2-1的长度,以使液体能够顺畅地流入血管。 I open hose end portion inclined, to ensure that the length of the slot 2-1, so that the liquid can flow smoothly into the blood vessel. 如图3所示,椭圆形端面与软管I管壁的夹角为α,夹角α的角度范围为40〜45度。 As shown in FIG. 3, the angle between the end face of the hose elliptical wall of I [alpha], [alpha] is an angle range of 40~45 degrees angle. 密封膜2位于缝隙2-1两侧的部分的厚度比其他部分的厚度薄。 The thickness of the slit 2 is located on both sides of portion 2-1 of the sealing film thickness is thinner than the other portions. 钢针4的头部设置有保护帽3,当钢针4的头部由缝隙2-1穿出时,保护帽3用于防止钢针4的头部划伤缝隙2-1两侧的密封膜2。 Head 4 is provided with a needle protective cap 3, when the head 4 of the needle piercing the slit 2-1, the protective sealing cap 3 for preventing the needle head portion 4 on both sides of the scratch slot 2-1 2 film.

[0021] 本发明单向瓣膜式留置针,密封膜2与软管I 一体连接,且密封膜2与软管I的连接处光滑过渡。 [0021] The present invention is a one-way valve type catheter, the sealing film and the hose 2 is integrally connected to I, and the sealing film 2 at the connection of the hose I a smooth transition. 插入人体血管时,避免伤到血管,保护帽3的顶部还设置有尾丝5,尾丝5穿过缝隙2-1,用以医护人员牵拉以去除保护帽3。 When inserted into the human blood vessels, to avoid injury to the blood vessel, the top of the protective cap 3 is further provided with a tail wire 5, the end of wire 5 through the slit 2-1 to health care workers to remove the protective cap 3 is pulled. 人手不用直接接触保护帽3,避免了污染。 Staff do not have direct contact with the protective cap 3, to avoid contamination.

[0022] 如图4所示,本发明单向瓣膜式留置针,软管I的尾部一体式连接有套管座9,套管座9的下端可拆卸连接有保护套7,套管座9的侧壁上设置有与其内腔相连通的延长管6 ;套管座9内设置有密封塞10,钢针4的尾部穿过密封塞10固定安装在位于保护套7内的固定件14上。 [0022] As shown, the one-way valve type indwelling needle of the present invention, tail portion connected to the hose 4 I integral with a sleeve holder 9, the lower end of the cannula holder 9 is detachably connected to a protective cover 7, the cannula holder 9 is provided with a lumen connected thereto through the side wall of the extension pipe 6; inner cannula holder 9 is provided with a sealing plug 10, the tail needle 4 passes through the sealing plug fixing member 10 is fixedly mounted on the protective sleeve 7 on 14 . 套管座9下端部的管壁沿其长度方向开有“F”形槽12,“F”形槽12包括横向固定部和竖向滑动部,保护套7的前端部设置有头端11,头端11设置有与“F”形槽12相配合的突起13,“F”形槽的长度满足以下条件:通过调整突起13在“F”形槽12上不同横向固定部的位置,能带动钢针4上下移动,进而使钢针4的头部由缝隙2-1伸出或缩回。 9 the lower end wall of the sleeve portion seat along the longitudinal direction of the opening "F" shaped slot 12, "F" shaped groove 12 includes a fixed portion and a lateral vertical sliding portion, the distal end portion of the protective sleeve 7 is provided with a head end 11, head end 11 is provided with a "F" shaped groove 12 cooperating projections 13, the length "F" shaped groove satisfies the following conditions: 13 by adjusting the projection position in different transverse fixing portion "F" shaped groove 12, can drive 4 needle moves up and down, thereby enabling the needle head portion 4 of the extension or retraction by a gap 2-1. 固定件14固定安装在保护套7内。 Fixing member 14 is fixedly mounted in a protective sleeve 7.

[0023] 如图1所示,为本发明单向瓣膜式留置针的结构示意图,使用时,转动保护套7,使突起13与相应的形槽12对应,以使头端11向套管座9内移动,使钢针4穿出缝隙2-1,然后去除保护帽3,给患者穿刺,穿刺成功后,旋转保护套7并取下,钢针4被拔出。 [0023] FIG. 1, a schematic structural diagram of Formula way valve indwelling needle of the present invention, in use, the protective sleeve 7 is rotated, the projection 13 corresponding to the respective shaped grooves 12, 11 so that the head end to the cannula hub moving the inner needle 4 9 2-1 piercing slit, and then the protective cap 3 is removed, the puncture to the patient, after successful puncture, and remove the rotating protective sheath 7, needle 4 is pulled out. 然后从软管6处输液或者注射,在压力的作用下,缝隙2-1打开,液体进入血管,外部压力消失时,缝隙2-1关闭。 Then the hose 6 from the infusion or injection, under pressure, the slit 2-1 is opened, the liquid into the vessel, the external pressure disappears, closing the gap 2-1. 防止回血形成血栓,避免了患者出现静脉炎的风险。 To prevent the return of blood clots, patients avoid the risk of phlebitis.

[0024] 实施例2 [0024] Example 2

[0025] 本实施例与实施例1的不同点在于,本发明单向瓣膜式留置针,固定件14可移动设置在所述保护套7内,所述固定件14上固定连接有柄翼8,所述保护套7上沿其长度方向开设有导向槽15,所述柄翼8位于导向槽15内并沿其走向上下移动;所述保护套7、导向槽15的长度满足以下条件:所述柄翼8在导向槽15内向下移动时,能带动钢针4的头部缩进保护套7内。 [0025] The present embodiment differs from Embodiment 1 in that the one-way valve type indwelling needle of the present invention, the fixed member 14 movably disposed within the protective sheath 7, 8 of the fixed handle member 14 fixedly connected with the flap the protective sleeve 7 defines along its length a guide groove 15, the flap 8 is located within the handle 15 and to move up and down along the guide grooves; the protective sheath 7, the length of the guide groove 15 satisfy the following condition: the moving said handle flap 8, the head 4 can drive the needle in the retracted within the guide groove 15 within the protective sheath 7. 钢针4不会刺伤到医护人员。 4 needle does not hurt to health care.

[0026] 上述单向瓣膜式留置针的使用方法与实施例1的不同之处在于:在取下保护套7前,向后滑动固定件14以使钢针4缩进保护套7内。 [0026] The formula way valve needle placement method used in Example 1 except that: before removing the protective sheath 7, the slide 14 rearwardly so that the fixing member 4 retracted needle guard 7.

Claims (9)

  1. 1.单向瓣膜式留置针,其特征在于,包括软管(I)和钢针(4),所述钢针(4)同轴设置于软管(I)内,所述软管(I)端部的开口倾斜设置,以形成一椭圆形端面,所述椭圆形端面上密封设置有密封膜(2); 所述密封膜(2)的中间位置上沿其长轴方向开设有一缝隙(2-1),所述缝隙(2-1)的设定满足:当所述软管(I)内有一定压力的液体时,所述缝隙(2-1)打开,液体由所述缝隙(2-1)流入血管内,当所述软管(I)内压力消失时,所述缝隙(2-1)关闭。 1. The catheter way valve type, characterized in that a hose comprising (I) and the needle (4), said needle (4) disposed coaxially within the tube (I), the hose (I ) open end portion disposed obliquely to form an elliptical end face of the elliptical end face seal is provided with a sealing film (2); defines a slot intermediate position along the longitudinal direction of the sealing film (2) of the ( 2-1), the slot (2-1) is set to satisfy: when a certain fluid pressure within the hose (the I), the slot (2-1) opened, liquid from said slot ( 2-1) flows into the vessel, when the hose (I) the pressure is removed, the slits (2-1) off.
  2. 2.根据权利要求1所述的单向瓣膜式留置针,其特征在于,所述密封膜(2)位于缝隙(2-1)两侧的部分的厚度比其他部分的厚度薄。 The formula of the one-way valve as claimed in claim 1, indwelling needle, characterized in that the sealing film (2) located in the thickness of the gap portion (2-1) on both sides of thinner than other portions.
  3. 3.根据权利要求1或2所述的单向瓣膜式留置针,其特征在于,所述椭圆形端面与软管(I)管壁的夹角为α,所述夹角α的角度范围为40〜45度。 The unidirectional valve of claim 12 of formula or as claimed in claim catheter, wherein the elliptical end face of the hose (I) [alpha] is the angle between the tube wall, the angle range of the angle [alpha] is 40~45 degrees.
  4. 4.根据权利要求1或2所述的单向瓣膜式留置针,其特征在于,所述钢针(4)的头部可拆卸安装有保护帽(3)。 The unidirectional valve of claim 12 of formula or as claimed in claim indwelling needle, wherein said needle (4) is detachably attached to the head of the protective cap (3).
  5. 5.根据权利要求4所述的单向瓣膜式留置针,其特征在于,所述保护帽(3)的顶部还连接有尾丝(5)。 The indwelling needle Formula way valve according to claim 4, characterized in that the top of the protective cap (3) is further connected to a tail wire (5).
  6. 6.根据权利要求1、2、3、4、或5所述的单向瓣膜式留置针,其特征在于,所述软管(I)的尾部一体式连接有套管座(9),所述套管座(9)的下端可拆卸连接有保护套(7),所述套管座(9)的侧壁上设置有与其内腔相连通的延长管¢);所述套管座(9)内设置有密封塞(10),所述钢针(4)的尾部穿过密封塞(10)固定安装在位于所述保护套(7)内的固定件(14)上。 According to claim 3, 4, or 5, said check valve type catheter, characterized in that the hose (I) is integrally connected to the tail of the cannula hub (9), the the lower end of said cannula hub (9) is detachably connected to a protective sleeve (7) is provided with a lumen in communication with its extension pipe ¢ sidewall of the cannula holder (9)); said cannula hub ( 9) is provided with a sealing plug (10), said needle (4) of the tail through the sealing plug (10) fixedly mounted within the protective sheath positioned (7) of the fixing member (14).
  7. 7.根据权利要求6所述的单向瓣膜式留置针,其特征在于,所述套管座(9)下端部的管壁沿其长度方向开有“F”形槽(12),所述“F”形槽(12)包括横向固定部和竖向滑动部,所述保护套(7)的前端部设置有头端(11),所述头端(11)设置有与“F”形槽(12)相配合的突起(13),所述“F”形槽的长度满足以下条件:通过调整突起(13)在“F”形槽(12)上不同横向固定部的位置,能带动所述钢针(4)上下移动,进而使钢针(4)的头部由缝隙(2-1)伸出或缩回。 The indwelling needle of formula way valve according to claim 6, wherein said cannula holder (9) the lower end wall of the opening portion along the length direction "F" shaped groove (12), said "F" shaped groove (12) comprises a fixed portion and a transverse vertical sliding portion, the protective sheath (7) of the distal end portion is provided with a head (11), said head (11) is provided with a "F" shape grooves (12) cooperating projections (13), the "F" shaped longitudinal groove satisfy the following condition: by adjusting the projection (13) in position (12) different lateral fixing portion "F" shaped slot, can drive said needle (4) move up and down, thereby enabling the needle (4) by the extension or retraction of the head gap (2-1).
  8. 8.根据权利要求6所述的单向瓣膜式留置针,其特征在于,所述固定件(14)固定安装在保护套(7)内。 The way valve according to claim 6 of formula catheter, wherein said fixing member (14) fixedly mounted in a protective sleeve (7).
  9. 9.根据权利要求6所述的单向瓣膜式留置针,其特征在于,所述固定件(14)可移动设置在所述保护套(7)内,所述固定件(14)上固定连接有柄翼(8),所述保护套(7)上沿其长度方向开设有导向槽(15),所述柄翼(8)位于导向槽(15)内并沿其走向上下移动;所述保护套(7)、导向槽(15)的长度满足以下条件:所述柄翼(8)在导向槽(15)内向下移动时,能带动钢针(4)的头部缩进保护套(7)内。 Way valve according to formula indwelling needle according to claim 6, wherein said fixing member (14) movably disposed within the protective sheath (7), fixedly connected to the fixing member (14) a handle flap (8), defines the protective guide groove (15) on the sleeve (7) along its longitudinal direction, said grip tab (8) of the guide groove (15) and vertically movable along its direction; the protective sheath (7), the length of the guide groove (15) satisfy the following condition: the grip tab (8) in the guide groove (15) within the moving needle can drive the head (4) of the protective sheath retracted ( 7).
CN 201510459936 2015-07-30 2015-07-30 Way valve indwelling needle of formula CN105013044B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1597000A (en) * 2004-07-21 2005-03-23 张商钱 Anti-countercurrent arteriovenous retention needle
US20080119704A1 (en) * 2006-10-04 2008-05-22 Mark Brister Analyte sensor
CN202590066U (en) * 2012-02-09 2012-12-12 张亚平 Antithrombotic anticoagulant type safe indwelling needle
CN103285450A (en) * 2013-03-25 2013-09-11 南通恒泰医疗器材有限公司 Multifunctional indwelling needle
CN203342135U (en) * 2013-03-25 2013-12-18 南通恒泰医疗器材有限公司 Multifunctional indwelling needle
CN204468877U (en) * 2015-01-28 2015-07-15 韩艳娇 Venous indwelling needle preventing blood backflow and blood clotting
CN204890813U (en) * 2015-07-30 2015-12-23 西安交通大学第一附属医院 Needle is kept somewhere to one -way valve formula

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1597000A (en) * 2004-07-21 2005-03-23 张商钱 Anti-countercurrent arteriovenous retention needle
US20080119704A1 (en) * 2006-10-04 2008-05-22 Mark Brister Analyte sensor
CN202590066U (en) * 2012-02-09 2012-12-12 张亚平 Antithrombotic anticoagulant type safe indwelling needle
CN103285450A (en) * 2013-03-25 2013-09-11 南通恒泰医疗器材有限公司 Multifunctional indwelling needle
CN203342135U (en) * 2013-03-25 2013-12-18 南通恒泰医疗器材有限公司 Multifunctional indwelling needle
CN204468877U (en) * 2015-01-28 2015-07-15 韩艳娇 Venous indwelling needle preventing blood backflow and blood clotting
CN204890813U (en) * 2015-07-30 2015-12-23 西安交通大学第一附属医院 Needle is kept somewhere to one -way valve formula

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