WO2015154302A1 - 带药液过滤功能医用输液接头 - Google Patents

带药液过滤功能医用输液接头 Download PDF

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Publication number
WO2015154302A1
WO2015154302A1 PCT/CN2014/075145 CN2014075145W WO2015154302A1 WO 2015154302 A1 WO2015154302 A1 WO 2015154302A1 CN 2014075145 W CN2014075145 W CN 2014075145W WO 2015154302 A1 WO2015154302 A1 WO 2015154302A1
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WO
WIPO (PCT)
Prior art keywords
medical
infusion
connector
channel
needle tip
Prior art date
Application number
PCT/CN2014/075145
Other languages
English (en)
French (fr)
Inventor
陈永曦
Original Assignee
福建省百仕韦医用高分子股份有限公司
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Filing date
Publication date
Application filed by 福建省百仕韦医用高分子股份有限公司 filed Critical 福建省百仕韦医用高分子股份有限公司
Priority to PCT/CN2014/075145 priority Critical patent/WO2015154302A1/zh
Priority to CN201480078746.2A priority patent/CN106456872A/zh
Publication of WO2015154302A1 publication Critical patent/WO2015154302A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/02—Access sites
    • A61M39/04—Access sites having pierceable self-sealing members
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
    • A61M2005/1657—Filter with membrane, e.g. membrane, flat sheet type infusion filter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/02—Access sites
    • A61M2039/0205—Access sites for injecting media
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/02—Access sites
    • A61M39/0208—Subcutaneous access sites for injecting or removing fluids
    • A61M2039/0226—Subcutaneous access sites for injecting or removing fluids having means for protecting the interior of the access site from damage due to the insertion of a needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/02—Access sites
    • A61M39/0208—Subcutaneous access sites for injecting or removing fluids
    • A61M2039/0241—Subcutaneous access sites for injecting or removing fluids having means for filtering
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7545—General characteristics of the apparatus with filters for solid matter, e.g. microaggregates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids

Definitions

  • the invention relates to a medical device for infusion outside the body, in particular to a medical infusion connector with a liquid filtering function.
  • the intravenous infusion set infusion needle is used in combination with the intravenous indwelling needle for infusion, as shown in Figure 1.
  • This infusion connector is more risky during use, especially for special patients such as infants, the elderly, and people with consciousness disorders.
  • the intravenous infusion steel needle is broken, and the broken end remains in the indwelling needle heparin cap. If it is found and treated in time, the sharp broken needle will enter the blood vessel with the infusion solution, penetrate into the blood vessel wall and soft tissue, and cause bleeding and infection. Damage caused by foreign matter reaction.
  • the object of the present invention is to provide a safer use for preventing broken needles or debris from entering human blood vessels according to the deficiencies of the prior art. Medical infusion connector with liquid filtration function.
  • the object of the present invention is achieved by the following route.
  • the utility model comprises a joint base docked with the extracorporeal indwelling catheter assembly and a docking joint connected with the medical fluid infusion device, the joint base and the joint or the integral structure or the split structure but integrated, and both of which are in the inner cavity
  • the infusion channel having mutual communication is characterized in that it further comprises a chemical liquid filtering component
  • the medical fluid filter assembly is composed of a filter membrane and a needle tip stop member, which is installed in the infusion channel, and the infusion channel is isolated into a pre-filtration channel and a filtered channel.
  • the needle tip stopping member comprises a blocking plate and an overflow passage, and a projection surface of the filtering front passage on the needle tip stopping member is located in the blocking plate, and the blocking plate is composed of a solid plate or a hollow plate with a hole bent or a porous plate with an inclined pore,
  • the liquid passage is either located outside the barrier plate or on the bent aperture and the inclined aperture on the barrier plate.
  • the infusion channel is isolated by isolation filtration.
  • the tip of the needle inserted from the pre-filtration channel is either blocked by the solid plate or blocked by the bent pore or blocked by the inclined pores. Block the needle tip and penetrate further.
  • the filter membrane removes debris and acts in a dual role, thereby effectively preventing broken needles and debris from entering the passage of the liquid filtering assembly.
  • the object of the present invention can also be achieved by the following means.
  • the needle tip stop member is a thin plate-like member composed of a central solid blocking plate and a plurality of through holes that surround the periphery of the blocking plate as a liquid passage.
  • the needle tip stop member is composed of a plurality of solid blocking plates which are axially staggered and covered along the infusion channel, and the adjacent two blocking plates are separated by an aperture.
  • the needle tip stop member is a cylindrical member with a top closed, a bottom opening, and a plurality of through holes distributed in the side wall, the outer diameter of which is smaller than the diameter of the infusion channel at the corresponding position, and the closed top is blocked.
  • the middle section of the infusion channel has a section with a large aperture, so that there are two steps in front and rear, and the cylindrical member is disposed on the rear step, and the top portion is spaced apart from the front step, and the interval is between the outer side of the tubular member and the inner wall of the infusion channel
  • the spacing and the plurality of through holes in the side wall of the tubular member and the inner cylindrical portion of the cylindrical member are sequentially connected to form a bent over-liquid passage.
  • the filter membrane is a sheet-like filter that is laminated with the tip stop and located behind the tip stop.
  • the other is: the filter plug is placed on the liquid passage of the needle tip stop.
  • the tip stopper is also the skeleton of the filter.
  • the filter installation portion is provided with a vent hole communicating with the outside, and the vent hole is provided with a venting plug which is permeable to liquid and liquid.
  • the medical fluid filter assembly is sandwiched between the joint base of the split structure and the docking joint.
  • the lower end of the joint is a flange-shaped upper mounting plate having a concave shape
  • the upper end of the joint base is a flange-shaped concave lower mounting plate
  • the pharmaceutical filter assembly is installed on the upper and lower mounting plates. In the inner cavity.
  • the adapter is either a needle connector or a needleless connector or a positive pressure connector that provides positive fluid flow after removal of the infusion set or syringe.
  • the present invention has the following advantages over the prior art: it can effectively prevent broken needles or debris from entering the human blood vessel, is safe to use, and at the same time, has a compact structure.
  • FIG. 1 is a schematic view showing the structure of an infusion connector and an indwelling needle in the prior art.
  • FIG. 2 is a schematic view showing the structure of a medical infusion connector with a liquid filtering function according to Embodiment 1 of the present invention.
  • 3 and 4 are a perspective view and a front cross-sectional view of the needle tip stop member in the embodiment 1.
  • Figure 5 is a schematic view showing the structure of a medical infusion connector with a liquid filtering function according to Embodiment 2 of the present invention.
  • Figure 6 is a schematic view showing the structure of a medical infusion connector with a liquid filtering function according to Embodiment 3 of the present invention.
  • 7 and 8 are a perspective view and a front cross-sectional view of the needle tip stop member in the third embodiment.
  • Figure 9 is a schematic view showing the structure of a medical infusion connector with a liquid medicine filtering function according to Embodiment 4 of the present invention.
  • Figure 10 is a schematic view showing the structure of a medical infusion joint with a liquid filtering function according to a preferred embodiment of the present invention.
  • a medical infusion connector with a medical liquid filtering function including a joint base 1 and a liquid filtering assembly 2 connected to the extracorporeal indwelling catheter assembly 2 And a connection joint with the chemical infusion device 3, the chemical liquid filter assembly 2 is sandwiched between the joint base 1 of the split structure and the joint 3, the joint base 1 and the joint 3
  • the split body is constructed but integrated, and both have internal infusion channels.
  • the medical liquid filter assembly 2 is composed of a filter membrane 21 and a needle tip stop member 22, which are installed in the infusion channel, and the infusion channel is isolated.
  • the filter front passage 41 and the filtered rear passage 42 are a sheet-like filter membrane laminated with the needle tip stop member 22 and located behind the needle tip stop member 22.
  • Connector 3 The lower end is a flange-shaped concave upper mounting plate, and the upper end of the joint base 1 is a flange-shaped concave lower mounting plate, and the pharmaceutical filter assembly 2 is mounted on the upper and lower mounting plates. In the inner cavity.
  • the needle tip stop member 22 is a thin plate-like member which is formed by a central solid blocking plate 221 And a plurality of through holes 222 surrounding the periphery of the blocking plate as a liquid passage.
  • the projection surface of the channel before the filtering is located in the blocking plate, that is, the projection surface is located on the blocking plate but the projected area is smaller than the area of the blocking plate.
  • This blocking plate consists of a solid plate.
  • the infusion needle on the infusion set passes through the sealant plug with the needle connector and enters the docking joint. Since the needle tip stopper is arranged on the filter membrane, the needle tip is prevented from penetrating the filter membrane, and the filter membrane is intact. There is no such concern when the infusion set is used with a needleless connector. Open the flow regulating valve on the infusion set.
  • the liquid is first filtered through the inner cavity of the joint, filtered through the liquid filtration membrane, and then passed through the inner cavity of the joint base to enter the lumen of the extension tube.
  • possible impurities in the liquid can be filtered. It avoids the damage of blood vessels in the chemical solution and avoids the foreign body reaction.
  • the connector 3 is a needleless connector.
  • the two solid blocking plates are formed by staggering the axial gaps along the infusion channel, and the adjacent two blocking plates are spaced apart. It is a liquid passage.
  • the adapter is either a needle connector or a needleless connector or a positive pressure connector that provides positive fluid flow after removal of the infusion set or syringe. Shown is a positive pressure connector with a positive liquid flow after removal of the infusion set or syringe.
  • Pharmaceutical filter assembly 2 The upper mounting plate of the installation is provided with a venting hole communicating with the outside, and a venting plug 5 with a gas permeable and liquid blocking is inserted in the venting hole.
  • the utility model relates to a cylindrical member with a top closed, a bottom opening and a plurality of through holes distributed on the side wall, wherein the outer diameter is smaller than the diameter of the infusion channel at the corresponding position, the closed top is the blocking plate, and the middle part of the infusion channel has a larger diameter.
  • a large passage thereby having two steps, the cylindrical member is disposed on the rear step, and the top portion is spaced apart from the front step, the interval and the interval between the outer side of the tubular member and the inner wall of the infusion passage and the side wall of the tubular member
  • the plurality of through holes and the inner cylinder of the cylindrical member are sequentially connected to form a bent over-liquid passage.
  • the needle tip stop member is also the skeleton of the filter membrane.
  • the filter membrane 21 is either an annular membrane that surrounds the periphery of the needle tip stop member 22.
  • filter 21 It is a filter element with fine pores, which is integrally inserted into the filter frame, and the filter frame is composed of a needle tip stop member 22.

Abstract

一种留置于身体外的输液用的带药液过滤功能的医用输液接头，包括与体外留置导管组件驳接的接头基座（1）和与药液输注器械驳接的驳接头（3），还包括一种药液过滤组件（2），药液过滤组件（2）由一种滤膜（21）和针尖止进件（22）组合在一起而组成，安装于输液通道中，将输液通道隔离成过滤前通道（41）和过滤后通道（42），针尖止进件（22）包括阻拦板（221）和过液通道（222）。该带药液过滤功能的医用输液接头可有效防止断针和碎屑进入人体血管，使用安全，结构较紧凑。

Description

带药液过滤功能医用输液接头 说明书内容
技术领域
本发明涉及一种留置于身体外输液用医疗器械，特别是一种 带药液过滤功能医用输液接头 。
背景技术
在静脉输液医疗场合， 静脉输液器输液针通过肝素帽与静脉留置针配合使用进行输液的方法，如图 1 所示，在国内医疗机构中使用较为普遍，这种输液接头在使用过程中 , 尤其是在给婴幼儿、老年、意识障碍等特殊患者使用时风险较大，由于病患躁动造成 静脉输液钢针折断，断端残留于静脉留置针肝素帽内，如果发现、处理不及时，锋利的断针会随着输注药液进入血管，刺入血管壁及软组织内，引发出血、感染、异物反应等损伤。并且输液过程中还可能发生穿刺胶塞落屑、塑料件受刮擦而产生的落屑以及接头配件内腔意外吸附的杂物碎屑，这些碎屑都有可能随输注药液进入血管内，引发异物反应。
发明内容
本发明的目的在于根据现有技术不足之处而提供一种可防止断针或碎屑进入人体血管的、使用较安全的 带药液过滤功能医用输液接头 。
本发明的目的是通过以下途径来实现的。
带药液过滤功能医用输液接头， 包括与体外留置导管组件驳接的接头基座和与药液输注器械驳接的驳接头，接头基座与驳接头或者一体构造或者分体构造但连接成一体，且二者内腔中均具有相互连通的输液通道，其组成要点在于：还包括一种药液过滤组件， 药液过滤组件由一种滤膜和针尖止进件组合在一起而组成，其安装于输液通道中，输液通道隔离成 过滤前通道和过滤后通道， 针尖止进件包括阻拦板和过液通道，过滤前通道在针尖止进件上的投影面位于此阻拦板内，此阻拦板或者由实心板组成或者由孔隙弯折的透空板组成或者由孔隙倾斜的透空板组成， 过液通道则或者位于此阻拦板以外或者位于阻拦板上的弯折孔隙以及倾斜孔隙上。
这样，以隔离过滤方式将输液通道隔离成 过滤前通道和过滤后通道。从过滤前通道插入的针尖或者被实心板所阻拦，或者被弯折孔隙所阻拦或者被倾斜孔隙所阻拦， 从而得以 阻拦针尖进一步刺入。滤膜滤除碎屑，双重作用，从而有效防止断针和碎屑进入药液过滤组件后通道。
本发明的目的还可以通过以下途径来实现。
关于针尖止进件有如下进一步的具体选择：
其中一种是：针尖止进件是一种薄板状构件，其由中央的实心阻拦板以及环围在阻拦板外围的复数个作为过液通道的透孔组成。
另一种是：针尖止进件由复数块实心阻拦板沿输液通道轴向间隔交错遮盖而组成，相邻两阻拦板间隔孔隙为过液通道。
再一种是：针尖止进件是一种顶部封闭、底部开口、侧壁分布有复数个透孔的筒状构件，其外径小于安装对应位置处的输液通道的孔径，封闭的顶部为阻拦板，输液通道中段有一个孔径较大的段落，从而具有前后两个台阶，筒状构件安设在后台阶上，其顶部与前台阶具有间隔，此间隔以及筒状构件外侧与输液通道内壁间的间隔以及筒状构件侧壁上的复数个透孔以及筒状构件内筒腔顺序连通组成弯折的过液通道。
关于滤膜可以有如下几种进一步的选择：
一种是：滤膜是一种片状滤膜，与针尖止进件层叠在一起并位于针尖止进件的后方。
另一种是：滤膜塞设在针尖止进件的过液通道上。
这时，针尖止进件还是滤膜的骨架。
滤膜安装处最好开设有与外界连通的排气孔，此排气孔中塞设有透气阻液的排气塞。
这样有利药液快速到达浸湿滤膜，让滤膜尽快发挥过滤功能，免去等待通过滤膜排气的时间。
药液过滤组件夹合在分体构造的接头基座与驳接头之间。
驳接头下端是一种法兰盘状的具有内凹的上安装盘，接头基座上端是一种法兰盘状的具有内凹的下安装盘，药业过滤组件安装在该上下安装盘之间的内凹腔中。
驳接头或者是一种有针接头，或者是一种无针接头，或者是一种具有拔除输液器或注射器后能产生正向液体流动的正压接头。
综上所述，本发明相比现有技术具有如下优点：可有效防止断针或碎屑进入人体血管，使用安全，与此同时，结构又较紧凑。
附图说明：
图 1 是现有技术中一种输液接头与留置针连接在一起的结构示意图。
图 2 是本发明实施例 1 所述 带药液过滤功能医用输液接头结构示意图。
图 3 、图 4 是实施例 1 中的针尖止进件的立体示意图和主剖视图。
图 5 是本发明实施例 2 所述 带药液过滤功能医用输液接头结构示意图。
图 6 是本发明实施例 3 所述 带药液过滤功能医用输液接头结构示意图。
图 7 、图 8 是实施例 3 中的针尖止进件的立体示意图和主剖视图。
图 9 是本发明实施例 4 所述 带药液过滤功能医用输液接头结构示意图。
图 10 是本发明最佳实施例所述 带药液过滤功能医用输液接头结构示意图。
下面结合附图对本发明进行更详尽的描述。
标号说明：
1 接头基座 2 药业过滤组件 21 滤膜 22 针尖止进件 221 阻拦板 222 透孔 223 间隔孔隙 3 驳接头
41 过滤前通道 42 过滤后通道 5 排气塞
具体实施方式
实施例 1 ：
参照图 2 ，带药液过滤功能医用输液接头， 包括与体外留置导管组件驳接的接头基座 1 、药液过滤组件 2 和与药液输注器械驳接的驳接头 3 ，药液过滤组件 2 夹合在分体构造的接头基座 1 与驳接头 3 之间，接头基座 1 与驳接头 3 分体构造但连接成一体，且二者内腔中均具有相互连通的输液通道。 药液过滤组件2由一种滤膜21和针尖止进件22组合在一起而组成，其安装于输液通道中，输液通道隔离成 过滤前通道 41 和过滤后通道 42 ，滤膜 21 是一种片状滤膜，与针尖止进件 22 层叠在一起并位于针尖止进件 22 的后方。驳接头 3 下端是一种法兰盘状的具有内凹的上安装盘，接头基座 1 上端是一种法兰盘状的具有内凹的下安装盘，药业过滤组件 2 安装在该上下安装盘之间的内凹腔中。
参照图 3 和图 4 ，针尖止进件 22 是一种薄板状构件，其由中央的实心阻拦板 221 以及环围在阻拦板外围的复数个作为过液通道的透孔 222 组成。 过滤前通道在针尖止进件上的投影面位于此阻拦板内，即：该投影面位于此阻拦板上但投影面积小于阻拦板的面积。此阻拦板由实心板组成 。
当输液时，输液器上输液针穿过有针接头的密封胶塞，进入驳接头内，由于滤膜上面设置了针尖止进件，防止针尖穿破滤膜，保护滤膜完好无损，而若输液器与无针接头配合使用时，则无此忧虑。打开输液器上流量调节阀，药液首先经过驳接头内腔，经过药液过滤膜过滤，再经过接头基座内腔，进入延长管连接座内腔，如此，药液中可能的杂质得以过滤，避免了药液中杂质对血管的伤害，同时避免了异物反应。
本实施例未述部分与现有技术相同。
实施例 2 ：
参照图 5 ， 带药液过滤功能医用输液接头，驳接头 3 是一种无针接头。
本实施例未述部分与实施例 1 相同。
实施例 3 ：
参照图 6 、图 7 和图 8 ，带药液过滤功能医用输液接头， 针尖止进件 22 由两块实心阻拦板沿输液通道轴向间隔交错遮盖而组成，相邻两阻拦板间隔孔隙 223 为过液通道。驳接头或者是一种有针接头，或者是一种无针接头，或者是一种具有拔除输液器或注射器后能产生正向液体流动的正压接头。图中所示是一种具有拔除输液器或注射器后能产生正向液体流动的正压接头。药业过滤组件 2 安装处的上安装盘上开设有与外界连通的排气孔，此排气孔中塞设有透气阻液的排气塞 5 。
本实施例未述部分与实施例 1 相同。
实施例 4 ：
参照图 9 ， 带药液过滤功能医用输液接头， 针尖止进件 22 是一种顶部封闭、底部开口、侧壁分布有复数个透孔的筒状构件，其外径小于安装对应位置处的输液通道的孔径，封闭的顶部为阻拦板，输液通道中段有一个孔径较大的段落，从而具有前后两个台阶，筒状构件安设在后台阶上，其顶部与前台阶具有间隔，此间隔以及筒状构件外侧与输液通道内壁间的间隔以及筒状构件侧壁上的复数个透孔以及筒状构件内筒腔顺序连通组成弯折的过液通道。滤膜 21 或者塞设在针尖止进件 22 侧壁的透孔上，这时，针尖止进件还是滤膜的骨架。滤膜 21 或者是一种套围在针尖止进件 22 外围上的环形滤膜。
本实施例未述部分与实施例 1 相同。
最佳实施例：
参照图 10 ， 带药液过滤功能医用输液接头，滤膜 21 是一种具有微细孔隙的滤芯，整体塞装在滤膜骨架内，滤膜骨架由 针尖止进件 22 构成。
本实施例未述部分与实施例 4 相同。

Claims (11)

  1. 带药液过滤功能医用输液接头， 包括与体外留置导管组件驳接的接头基座和与药液输注器械驳接的驳接头，接头基座与驳接头或者一体构造或者分体构造但连接成一体，且二者内腔中均具有相互连通的输液通道，其特征在于，还包括一种药液过滤组件， 药液过滤组件由一种滤膜和针尖止进件组合在一起而组成，其安装于输液通道中，输液通道隔离成 过滤前通道和过滤后通道， 针尖止进件包括阻拦板和过液通道，过滤前通道在针尖止进件上的投影面位于此阻拦板内，此阻拦板或者由实心板组成或者由孔隙弯折的透空板组成或者由孔隙倾斜的透空板组成， 过液通道则或者位于此阻拦板以外或者位于阻拦板上的弯折孔隙以及倾斜孔隙上。
  2. 根据权利要求1所述的带药液过滤功能医用输液接头，其特征在于，针尖止进件是一种薄板状构件，其由中央的实心阻拦板以及环围在阻拦板外围的复数个作为过液通道的透孔组成。
  3. 根据权利要求1所述的带药液过滤功能医用输液接头，其特征在于，针尖止进件由复数块实心阻拦板沿输液通道轴向间隔交错遮盖而组成，相邻两阻拦板间隔孔隙为过液通道。
  4. 根据权利要求1所述的带药液过滤功能医用输液接头，其特征在于，针尖止进件是一种顶部封闭、底部开口、侧壁分布有复数个透孔的筒状构件，其外径小于安装对应位置处的输液通道的孔径，封闭的顶部为阻拦板，输液通道中段有一个孔径较大的段落，从而具有前后两个台阶，筒状构件安设在后台阶上，其顶部与前台阶具有间隔，此间隔以及筒状构件外侧与输液通道内壁间的间隔以及筒状构件侧壁上的复数个透孔以及筒状构件内筒腔顺序连通组成弯折的过液通道，滤膜安装在针尖止进件上。
  5. 根据权利要求4所述的带药液过滤功能医用输液接头，其特征在于，滤膜或者塞设在针尖止进件侧壁的复数个透孔中，或者是一种具有微细孔隙的滤芯，整体塞装在针尖止进件的筒形空腔中。
  6. 根据权利要求1所述的带药液过滤功能医用输液接头，其特征在于，滤膜是一种片状滤膜，与针尖止进件层叠在一起并位于针尖止进件的后方。
  7. 根据权利要求1所述的带药液过滤功能医用输液接头，其特征在于，滤膜塞设在针尖止进件的过液通道上。
  8. 根据权利要求1所述的带药液过滤功能医用输液接头，其特征在于，滤膜安装处开设有与外界连通的排气孔，此排气孔中塞设有透气阻液的排气塞。
  9. 根据权利要求1所述的带药液过滤功能医用输液接头，其特征在于，药液过滤组件夹合在分体构造的接头基座与驳接头之间。
  10. 根据权利要求1所述的带药液过滤功能医用输液接头，其特征在于，驳接头下端是一种法兰盘状的具有内凹的上安装盘，接头基座上端是一种法兰盘状的具有内凹的下安装盘，药业过滤组件安装在该上下安装盘之间的内凹腔中。
  11. 根据权利要求1或9或10所述的带药液过滤功能医用输液接头，其特征在于，驳接头或者是一种有针接头，或者是一种无针接头，或者是一种具有拔除输液器或注射器后能产生正向液体流动的正压接头。
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