CN1039728A - 具有自定位注射针防护装置的静脉注射导管 - Google Patents

具有自定位注射针防护装置的静脉注射导管 Download PDF

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CN1039728A
CN1039728A CN89106713A CN89106713A CN1039728A CN 1039728 A CN1039728 A CN 1039728A CN 89106713 A CN89106713 A CN 89106713A CN 89106713 A CN89106713 A CN 89106713A CN 1039728 A CN1039728 A CN 1039728A
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弗朗西斯·P·勒米厄
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0612Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0618Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for protecting only the distal tip of the needle, e.g. a needle guard
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0606"Over-the-needle" catheter assemblies, e.g. I.V. catheters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3273Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel freely sliding on needle shaft without connection to syringe or needle

Abstract

本发明描述了一种静脉注射的导管,它包括一个导管和套筒装置以及一个注射针和套筒装置。一个注射针防护装置包括一个圆筒形远端部分和一个带槽的近端凸缘,所说的防护装置位于注射针套筒的远端上的注射针附近。注射针在靠近注射针尖处有一个槽。当注射针从导管上抽出时,注射针防护装置沿注射针滑动,直到带槽的凸缘与注射针槽相接合,这把防护装置的筒状远端部分锁紧在注射针尖上。

Description

本发明涉及静脉注射导管,特别涉及使用后能覆盖插管针尖以防止用后的注射针造成意外伤害的静脉注射导管。
把液体输注到一个病人的外围静脉内的静脉注射导管是用在静脉注射治疗的最常用装置中的一种。静脉注射导管通常按两种型式生产:一种是通过型注射针导管,其中一个导管是通过注射针插管并进入病人的静脉;另一种是盖住型注射针导管,其中注射针和同轴的外层导管被插入静脉中并且注射针穿过安置就位的导管而被抽出。
一个典型的盖住型注射针的静脉注射导管需要使用者在注射针尖和导管在病人静脉内正确定位后取出然后处理一个弄脏的注射针。一旦注射针从导管中抽出,使用者立即优先处置的是灌注装置的连接和定位准备,包括把导管安接在病人身上。由于这些是紧急的,注射针通常在附近刚被垂下然后就被回收。因为在这时注射针是暴露的并且位于接近使用者正在接通导管的位置上,所以意外的自身遭受注射针的伤害是通常的。为了防止使用者接触肝炎和爱滋病的客观需要,这就增加了保护使用者不受注射针意外伤害的需要。
针对这种需要的一种导管设计如美国专利申请(申请日是1987年3月5日、顺序号为022132)所示。在该申请中所示的导管包括一个安装有一个滑动的注射针防护装置的细长体。当注射针从安置就位的导管中抽出时,使用者推动在注射针防护装置远端上的凸出物,由此从壳体并沿注射针方向把注射针保护装置滑出,直到防护装置的远端覆盖注射针尖并且防护装置的近端锁在壳体上。然后注射针和防护装置能够被置于一侧使得注射针尖完全被保护。
虽然在该专利申请中所描述此装置提供了针对注射针意外伤害的完备保护,但是要求超过注射针长度的一个滑动注射针防护装置必然需要一个相当长的和体积庞大的装置。此外,由于使用者在防护装置将超过注射针尖而锁住就位之前必须沿整个注射针长度推动防护装置的凸出物,因此对于使用者用小手和手指来操作的装置是稍麻烦的。
因此,人们希望能用一个小的注射针防护装置可靠地保护注射针,并且最好从病人身上抽出注射针时能自动地移动注射针防护装置到超过注射针尖的位置,而不需要使用者作任何特殊动作的干预。
按照本发明的原理,提供了一种带有自定位注射针防护装置的静脉注射导管。注射针防护装置被定位在注射针和注射针套筒连接处的注射针附近。在使用导管之前,具有足够的长度刚好覆盖注射针远端部分的防护装置是定位在导管套筒内。在它的近端,筒状的防护装置包括一个开口的锁紧凸缘,该凸缘把防护装置限制在导管套筒之内。当注射针从病人身上抽出时,防护装置将保持在导管套筒内,直到锁紧凸缘与被定位邻近注射针远端的一个槽相接合为止。由此,当注射针完全从导管中抽出时,防护装置锁紧定位在超过注射针尖的位置上。
图1表示了一个按照本发明的原理构造的静脉注射导管的透视图;
图2是图1所示的静脉注射导管的部分剖面图,但不包括注射针防护装置;
图3表示了注射针防护装置就位在导管套筒中的图2所示的剖面图;
图4是图3所示的注射针防护装置的详细剖面图;
图5表示了被定位在注射针近端时的注射针防护装置;
图6表示了被锁紧在注射针远端时的注射针防护装置;
图7表示本发明的带槽的静脉注射导管注射针的另一个实施例的部分剖面图;
图8表示了装有即时血液泻放探测装置的一种带槽静脉注射导管注射针的部分剖面图。
首先参看图1,所示的是按照本发明的原理构造的静脉注射导管。导管10包括一个由氟化乙烯丙烯或聚氨基甲酸脂材料制成的管子15。管子15在它的远端成锥状,使之易于滑进由一个中空注射针12在病人身上形成的一个开口中。导管管子15的近端同轴地固定在一个导管套筒16、18的远端内。双重直径的套筒在它的近端处终止在一个凸出物或连接件14上,所说的凸出物或连接件14适于把导管套筒装到一个操纵静脉注射液体源的管子装置上。
导管10用中空的注射针12接合,所说的中空注射针12在它的近端被固接到一个注射针套筒20上。注射针套筒20是中空的并包括一个被近端定位的凸缘23,模注到凸缘上的是一个中空的泻放室26,它由诸如聚丙烯或者聚碳酸脂的透明的或半透明的聚合物制成。注射针的近端终止在套筒20处,但只除去了泻放室。
插进泻放室26中的(图1中所示的是插入前的分离状态)是一个泻放塞30。泻放塞30是用聚合材料制成的并且当被插进泻放室时将有摩擦地保持就位。泻放塞体包括一个较小直径的远端32,其尺寸适于与泻放室26成摩擦配合,还包括一个具有凸形侧面的稍微成方形的近端34,这使得泻放塞很容易地被抓住并插进泻放室中。泻放塞30是中空的并具有一个贯穿整个泻放塞体的孔36。孔36的远端开口在图1中可见。由一个多孔材料制成的插入件是位于孔36内。多孔插入件能透过泻放室排出的空气流,而此时泻放室充满了血液,但是插入件的小孔是足够的小以阻止血液流动通过。
接下来参看图2,在剖面图中详细地图示了导管15和它的套筒16和18,注射针12以及注射针套筒20。导管15的近端通过一个衬套40被固定在导管套筒的远端16的通道17内。衬套40被定位在导管15的腔体的近端内。通过把衬套40压入导管的腔体内,衬套引起导管的近端膨胀以与通道17的内表面相接触,由此把套筒和导管锁定在一起,以防止它们之间的轴向运动。衬套40在它的近端成向外的锥形,以形成一个起到相对于通道17可靠地定位衬套40的作用的凸缘42。
中空的注射针12从它的远端尖部经导管15和衬套40伸展并进入到在注射针套筒20中心处的通道27内。注射针12的近端用环氧树脂24被固接在注射针套筒20的远端上。注射针12的近端伸展超过环氧树脂并进入到通道中,因此注射针的腔体在装配操作时将不为环氧树脂被填充。
注射针套筒20的远端28的直径比大部分注射针套筒上的直径小。选定这个较小的直径端是为了连接到导管套筒18的开口近端上。
在一个通常的导管和引导器注射针装置中,注射针套筒的较小直径的远端通常是细长的锥状以基本上占据导管套筒的近端内壁。在本发明中的导管装置中,人们可以看出在导管套筒近端18内的腔体的大部分22是未填充的,而只有注射针12伸展通过此区域。保留在导管套筒内的这个空间的原因参照附图3就清楚了。
在图3中人们可以看出一个注射针尖防护装置30被定位在导管套筒的腔体内。图4是注射针尖防护装置30的一个放大了的剖面图,它象一个带凸缘的圆柱体。防护装置的圆柱形远端部分32有一个内孔,其直径能使远端部分32光滑地沿注射针12滑过。因此,圆柱形部分32的内径比注射针的外径稍大一点。在防护装置30的近端是一个带有中心圆孔36的圆形锁紧凸缘34,所说的圆孔36与圆柱形部分32的内孔同轴。凸缘孔36的直径比注射针12的外径稍微小一点。凸缘34和圆柱形部分32的一个近端由一个扩展槽38被水平地开槽。注射针尖防护装置30用柔性材料制成,因此凸缘和圆柱形部分将象如下所述那样可以弯曲开启和再次关闭。
同时参看图3和图5,当导管和引导器注射针在使用之前装配时,注射针尖防护装置是在注射针尖上滑动以滑到一个邻近注射针套筒20的远端的位置上。由于凸缘孔36的直径比注射针的外径稍小一点,因而注射针将在膨胀槽38的位置上把注射针尖防护装置打开。导管和导管套筒在注射针上滑动,直到套筒18如图3所示与注射针套筒的远端相接合。从而注射针尖防护装置30在导管套筒的腔体22内被闭合。凸缘34的伸展使得凸缘的顶部和底部与导管套筒的内壁相接合,如图中标号39所示。由此,注射针尖防护装置适当地被保持在导管套筒腔体22内。为了确保注射针尖防护装置保持在腔体22内,人们可以进一步希望形成从导管套筒的内壁伸展恰为邻近防护装置的指定位置的凸起物,如图中44所示。
当使用者已经恰当地把注射针尖和导管的远端定位在病人的动脉或者静脉内之后,如在泻放室内出现血液来指示,从导管中抽出注射针和注射针套筒以为把导管装置装到导管套筒上作准备。当注射针开始抽出时,注射针尖防护装置30沿注射针滑动,但由于凸缘34和导管套筒在39的接合,它仍保持就位在腔体22中。注射针尖防护装置30如图5所示沿注射针滑动。最终抽出注射针,因而靠近注射针12针尖的一个接合槽50与凸缘34对准。在这一瞬间,防护装置的膨胀槽38弹回闭合而围绕孔36的凸缘的边缘与槽50相接合。由于凸缘不再伸开,所以它不再保持在导管套筒内,但它将离开腔体22与注射针12和槽50相接合,如图6所示。然后,注射针可以安全地置于一侧而没有意外伤害的危险。
在一个按照本发明的原理构造的静脉注射导管中,人们可以希望确保由成功的静脉穿刺术引起的初始血液“泻放”被立即导引经过注射针腔到达泻放室26,而没有任何血液泄漏出接合槽50。为了提供这个功能,接合槽50可以如图7所示由一个薄膜52所覆盖。薄膜52可以在槽的位置上部分地或整个地围绕注射针12。薄膜52将密封接合槽以防止血液在这一点上泄漏出注射针,但是它必须是足够的柔软,因此它将膨胀而没有破裂,虽然防护装置凸缘34与槽50相接合。因此注射针防护装置30可靠地与接合槽50相接合,而薄膜52防止了任何血液泄漏通过槽。
然而,为了某些应用,人们希望能取得开式接合槽50的优点。用于静脉穿刺术的标准技术要求开业医生目视观察在注射针套筒泻放室内的血液以确定注射针尖和导管是在血管内。对于小尺寸的静脉注射导管,血液的泻放是很小的,并且在传送到泻放室的过程中它不能被即刻目视观察。况且还有应该避免人们在静脉穿刺术位置和在导管近端的泻放室之间的目视所存在的错觉。因此,人们希望提供血液泻放的更快速探测,并希望避免开业医生从静脉穿刺术位置目视的需要。
这些目的能够通过利用槽50来早期探测甚至少量的血液泻放而被解决。如图8所示,槽50恰恰位于接近注射针尖和导管15的锥状末端19。当血管被刺破时,血液将向上流动经注射针腔至槽50,如图中54所示它将充满槽的腔。然后血液将流经注射针12和导管15之间的小区域(如图中的56所示)。当该在腔内的血流扩展超过皮肤线时(由虚线60表示),血液在导管和注射针之间是可见的,如图中58所示。因而这个小的血液泻放58通过在静脉穿刺术位置的透明或半透明的导管时被立即看见,这表明开业医生静脉穿刺术是成功的。
人们可以意识到按这种方法的血液泻放探测消除了对于在注射针套筒的近端上的泻放室的需要。因此,从排放的泻放塞的血液泄漏能被防止。此外,也不需要血液充满整个注射针腔,如果需要它也可以接近槽50被阻塞或终止。因而增强了甚至对小血液泻放的快速探测。
从上面对本发明的说明,对于使用者来说另外的技术提高和改进将是明显的。例如,为了确保接合槽50和注射针尖防护装置的凸缘34之间的恰当对准,人们希望在导管套筒18的内侧和在注射针套筒20远端28的外缘和注射针尖防护装置的边缘39处形成配合槽和凸出部分。通过以这种方式处理导管部件,接合槽50的纵向边缘将保持与防护装置的膨胀槽38相对准,以确保在接合槽内防护装置凸缘的接合。

Claims (11)

1、一种带有自锁注射针防护装置的静脉注射导管包括:
一个导管装置,它包括一个被装在一个中空导管套筒上的导管;
一个引导器注射针装置,它包括一个具有一个远端针尖的中空注射针,所说的注射针在接近它的近端处被固定在一个注射针套筒上,所说的注射针套筒的远端适于与所说的中空导管套筒相接合,并且所说的注射针包括用于接合一个注射针防护装置的装置;
一个适于限制在所说的中空导管套筒内的注射针防护装置,所说的注射防护装置包括具有用于接合所说注射针的所说接合装置的装置的一个近端部分并包括在所说的近端部份与所说注射针的所说接合装置相接合时,用于伸展超过所说注射针尖的一个远端部份。
2、按照权利要求1所述的静脉注射导管,其中所说注射针的所说接合装置包括一个位于邻近所说注射针的所说远端针尖的接合槽。
3、按照权利要求2所述的静脉注射导管,其中所说注射针防护装置的所说远端部分包括一个其内径稍大于所说注射针外径的圆柱形部分。
4、按照权利要求3所述的静脉注射导管,其中所说注射针防护装置的所说近端部分包括一个具有与所说的远端圆柱形部分对准的中心孔的凸缘,并且所说注射针防护装置的接合装置包括一个通过所说凸缘的轴向上对准的膨胀槽。
5、按照权利要求4所述的静脉注射导管,其中当所说的凸缘孔的边缘与所说注射针的接合槽相接合时,所说的注射针防护装置与所说的注射针锁紧接合。
6、按照权利要求4所述的静脉注射导管,其中所说的凸缘孔的直径小于所说注射针的外径;
由此当所说的注射针整个直径穿过所说的凸缘孔时,所说的注射针在所说的膨胀槽附近展开所说的凸缘。
7、按照权利要求1所述的静脉注射导管,其中所说的注射针防护装置还包括一个在所说注射针接合装置和所说注射针防护装置的接合装置连接之前用于把所说注射针防护装置保持在所说导管套筒内的装置。
8、按照权利要求1所述的静脉注射导管,其中所说注射针防护装置的所说近端部分包括一个具有一个中心孔的径向伸展的凸缘,并且所说的保持装置包括一个通过所说的凸缘的轴向上对准的膨胀槽,
由此,当所说的膨胀槽开启响应于所说注射针通过所说中心孔的通道时,所说的凸缘与所说的导管套筒相接触。
9、一种能在插管中快速探测血液的静脉注射导管包括:
一个导管装置,它包括一个被装在一个中空导管套筒上的导管;
一个引导器注射针装置,它包括一个具有从所说导管的远端伸展的远端头的插管,所说的插管包括一个位于它的壁上的槽,它用于血液通道到所说插管和所说导管之间的区域中,
因此,血液的存在可以在所说插管和所说导管之间目视探测。
10、按照权利要求9所述的静脉注射导管,其中所说导管由一个透明的或半透明的材料制成。
11、一个具有自锁注射针防护装置的静脉注射导管包括:
一个导管装置,它包括一个被装在一个导管套筒上的导管;
一个引导管注射针装置,它包括一个具有一个远端针尖的中空注射针,所说的注射针在接近它的近端处被装到一个注射针套筒上,并且所说的注射针包括一个用于接合一个注射针防护装置的装置;
一个注射针防护装置,它初始定位在所说注射针套筒远端处的所说注射针附近,所说的注射针防护装置包括具有用于接合所说注射针的所说接合装置的装置的一个近端部分并包括在所说近端部分与所说注射针的所说接合装置相接合时,用于伸展超过所说注射针尖的一个远端部分。
CN89106713A 1988-07-11 1989-07-11 带有自定位针头护套的静脉施药导管 Expired - Lifetime CN1027137C (zh)

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EP0352928B1 (en) 1992-12-30
DE68904136D1 (de) 1993-02-11
CA1313099C (en) 1993-01-26
CN1027137C (zh) 1994-12-28
AU611817B2 (en) 1991-06-20
EP0352928A1 (en) 1990-01-31
JPH0299070A (ja) 1990-04-11
PT91106A (pt) 1990-02-08
JP2925167B2 (ja) 1999-07-28
ZA895233B (en) 1991-03-27
PH25761A (en) 1991-10-18
EP0352928B2 (en) 1995-08-30
BR8903380A (pt) 1990-02-13
ATE83937T1 (de) 1993-01-15
KR0136100B1 (ko) 1998-04-25
NZ229821A (en) 1991-06-25
KR900001386A (ko) 1990-02-27
MX169084B (es) 1993-06-21
US4952207A (en) 1990-08-28
PT91106B (pt) 1997-08-29
AU3802789A (en) 1990-01-11
DE68904136T2 (de) 1996-01-25

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