WO2019019168A1 - Indwelling needle having movable grooved sealing member - Google Patents
Indwelling needle having movable grooved sealing member Download PDFInfo
- Publication number
- WO2019019168A1 WO2019019168A1 PCT/CN2017/094956 CN2017094956W WO2019019168A1 WO 2019019168 A1 WO2019019168 A1 WO 2019019168A1 CN 2017094956 W CN2017094956 W CN 2017094956W WO 2019019168 A1 WO2019019168 A1 WO 2019019168A1
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- WIPO (PCT)
- Prior art keywords
- needle
- needle tube
- sliding sleeve
- sealing member
- hole
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- 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
Definitions
- the present invention relates to an indwelling needle, and more particularly to an indwelling needle having a movable sealing groove seal.
- Fig. 1 In the prior art indwelling needle technique, as shown in Fig. 1, it consists of a catheter assembly 1, a barrier member 2 mounted in its inner cavity, a puncture needle tube 3, and an operating handle 4 fixed to the needle tube.
- the barrier member 2 is composed of a sealing material.
- the cross section of the material is not preset.
- the puncture needle tube 3 is longitudinally penetrated from the center of the cross section, and the cross section of the barrier member after the needle is removed is elastically restored without remaining the pores, thereby effectively blocking the liquid.
- the catheter hub of the catheter assembly is made of a transparent or translucent material to facilitate the return of blood from the lumen of the transparent catheter hub during puncture, and the blood can flow into the lumen of the transparent catheter hub for puncture.
- the tip of the needle is provided with a tip opening 3.1 and a puncture observation. Return the side hole 3.2 of the blood, so that the blood flows into the lumen of the needle through the tip opening 3.1, and then flows out through the blood return side hole 3.2, enters the annulus between the needle tube and the catheter, and then flows into the lumen of the transparent catheter seat to determine whether the needle tip penetrates. Intravascular. In this configuration, the indwelling needle is withdrawn after the puncture is completed, especially when the needle portion of the needle is partially withdrawn into the barrier member, and the barrier member must be of sufficient length to completely cover the end opening and the blood returning hole on the needle tube at the same time.
- the blood in the lumen of the transparent catheter can not pass through the lumen of the front end of the needle tube and the blood return side hole overflows outside the catheter seat, thereby causing blood pollution.
- Such a sufficient length of the barrier member inevitably increases the contact area between the barrier member and the outer surface of the needle tube passing therethrough, and the frictional resistance is greatly increased during the natural needle withdrawal process, which causes inconvenience to the indwelling needle operation, during the needle withdrawal process, Care must be taken to secure the catheter assembly to prevent it from being pulled out of the blood vessel during withdrawal.
- the object of the present invention is to overcome the deficiencies in the prior art and to provide an indwelling needle having a movable sealing groove seal which has less needle withdrawal resistance and at the same time effectively blocks puncture blood exposure.
- the object of the present invention is achieved by the following route.
- An indwelling needle with a movable sealing seal comprising a catheter assembly, a barrier member mounted in the inner cavity thereof, a puncture needle tube and an operating handle fixed to the needle tube, the tip end of the needle tube is provided with a tip opening and a side hole for puncture and blood returning.
- the side hole is located behind the opening, the distance between the front end point of the opening and the rear end point of the side hole is a sharp hole distance, and the catheter seat has a lateral indwelling channel, the main point of which is that a cavity is arranged in the inner cavity of the catheter assembly behind the blocking member.
- a sealing groove sealing member is inserted in the inner cavity of the sliding sleeve, the front end surface of the sealing member is closely attached to the rear end surface of the blocking member, the rear end surface of the sealing member is in contact with the inner side wall of the sliding sleeve, and the outer peripheral wall of the sliding sleeve and the conduit assembly
- the inner cavity wall slides and has a damped connection
- the sealing member is an elastic body
- the needle tube penetrates the sealing member and the inner side wall of the sliding sleeve
- the needle tube behind the side hole is provided with a radially convex annular convex card
- the sliding sleeve side wall Set up The diameter of the middle hole of the needle insertion tube is between the outer diameter of the annular convex card and the outer diameter of the needle tube, and the length of the barrier member is smaller than the distance of the tip hole.
- the needle when the catheter is successfully inserted, the needle is withdrawn and the needle portion of the needle is partially withdrawn into the barrier, the blood-receiving side hole of the needle exits the barrier and enters the sealing seal, and the tip opening of the needle is still in the catheter holder. Or in the barrier member, but because the blood return side hole is sealed by the sealing groove seal, the blood is blocked from entering the inner lumen of the needle tube through the tip opening of the needle tube, and then overflows the outer passage of the catheter seat through the blood return side hole. Continue to withdraw the needle tube until the blood return side hole of the needle tube completely enters the sealing groove seal.
- the annular convex card on the needle tube abuts against the inner side wall of the outer sliding sleeve of the sealing member, and then continues to withdraw the needle tube to drive the sealing member and the sliding sleeve to slide together.
- the needle tube carries the sealing member and the sliding sleeve out of the lumen of the catheter seat, and the sealing groove seal prevents the blood from overflowing through the blood returning side hole, so that the needle can be easily withdrawn.
- the object of the invention can also be achieved by the following means:
- the position of the center of the sealing member through the needle tube may not be provided with a through hole or a slit, or a slit may be preset to facilitate the penetration of the needle tube, and a through hole slightly smaller than the outer diameter of the needle tube may be longitudinally penetrated.
- the annular convex card is either a flat shape or an olive shape.
- This smooth ramp-like transition facilitates the sliding of the needle tube in the catheter and seal through-holes.
- the present invention has the following advantages over the prior art: the needle withdrawal resistance is small, the operation is convenient, and at the same time, the blood can be effectively prevented from overflowing through the blood return side hole.
- FIG. 1 is a schematic view showing the structure of an indwelling needle in the prior art.
- Figure 2 is a schematic view showing the structure of an indwelling needle having a movable sealing groove seal according to the present invention
- Figure 3 is a schematic view of a needle tube and a catheter in the present invention.
- Figure 4 is a schematic view showing the state of needle withdrawal of an indwelling needle having a movable sealing groove seal according to the present invention
- Figure 5 is a schematic view showing the state of needle withdrawal of an indwelling needle having a movable sealing groove seal according to the present invention
- Figure 6 is a schematic view showing the state of needle withdrawal of an indwelling needle having a movable sealing groove seal according to the present invention
- Figure 7 is a schematic view showing the state of the indwelling needle having the movable sealing groove seal after the needle is removed;
- an indwelling needle having a movable sealing seal includes a catheter assembly 1, a barrier member 2 mounted in the lumen thereof
- the puncture needle 3 is composed of an operation handle 4 fixed to the needle tube.
- the barrier member 2 is composed of a sealing material, and the puncture needle tube 3 is longitudinally penetrated from the center of the cross section, and the cross section of the barrier member after the needle is removed is elastically restored without remaining the pores, thereby effectively blocking the liquid.
- the catheter hub of the catheter assembly is made of a transparent or translucent material to facilitate the return of blood from the lumen of the transparent catheter hub during puncture, and the blood can flow into the lumen of the transparent catheter hub for puncture.
- the tip of the needle is provided with a tip opening 3.1 and a puncture observation.
- the side hole 3.2 is located behind the opening 3.1, and the distance between the front end point of the opening 3.1 and the rear end point of the side hole 3.2 is the sharp hole distance.
- the needle tube behind the side hole 3.2 is provided with a radially convex annular convex card 3.3, which is either flat or in the shape of an olive. There is a smooth ramp-shaped transition between the rear end of the annular convex card 3.3 and the needle tube 3.
- a sliding sleeve 6 is disposed in the inner cavity of the catheter assembly 1 behind the barrier member 2, and a sealing groove sealing member 5 is plugged in the inner cavity of the sliding sleeve 6, and the front end surface of the sealing member 5 and the blocking member 2 are The rear end surface of the sealing member 5 is in contact with the inner side wall of the sliding sleeve 6.
- the outer peripheral wall of the sliding sleeve 6 slides with the inner wall of the catheter assembly 1 and has a damped connection.
- the central portion of the sealing member 5 longitudinally penetrates a slit for facilitating the penetration of the needle tube.
- the diameter of the middle hole of the sleeve 6 disposed on the rear wall is between the outer diameter of the annular convex card and the outer diameter of the needle tube, and the length of the barrier member is smaller than the distance between the sharp holes.
- the contact area between the inner retaining needle and the needle tube is much reduced, so that the axial sliding friction between the two is much smaller, especially for the large-sized indwelling needle, which makes the puncture and needle removal operation more portable.
- the needle tube carries the sealing member and the sliding sleeve out of the lumen of the catheter seat, as shown in Figs. 6 and 7, the sealing sealing member prevents blood from passing through the blood returning side. The hole overflows and is contaminated, so that the needle can be easily withdrawn.
Abstract
An indwelling needle having a movable grooved sealing member, comprising a catheter assembly (1), a barrier member (2) mounted in the inner cavity of the catheter assembly, a puncture needle tube (3), and an operating handle (4) fixedly connected to the needle tube (3). A sliding sleeve (6) is provided in the inner cavity of the catheter assembly (1) behind the barrier member (2); a grooved sealing member (5) is plugged in the inner cavity of the sliding sleeve (6); the front end surface of the sealing member (5) is in close contact with the rear end surface of the barrier member (2); the rear end surface of the sealing member (5) is in contact with the inner side wall of the sliding sleeve (6); the outer peripheral wall of the sliding sleeve (6) slides relative to the wall of the inner cavity of the catheter assembly (1), and the sliding sleeve (6) is connected to the catheter assembly (1) by means of a damper; the central portion of the sealing member (5) is longitudinally penetrated by a through hole with a size equal to or slightly larger than the outer diameter of the needle tube (3); the needle tube (3) behind a side hole (3.2) is provided with an annular radially convex ring (3.3); the diameter of an intermediate hole that is coaxial with the through hole of the sealing member (5) and provided on the rear wall of the sliding sleeve (6) is between the outer diameter of the annular convex ring (3.3) and the outer diameter of the needle tube (3); and the length of the barrier member (2) is less than the distance of a sharp hole. The following advantages are provided: the needle removal resistance is small; the operation is convenient; and the contamination caused by the blood overflowing through a blood return side hole can be effectively avoided.
Description
本发明涉及一种留置针，特别是一种具有活动封槽密封件的留置针。The present invention relates to an indwelling needle, and more particularly to an indwelling needle having a movable sealing groove seal.
现有留置针技术中如图1所示，其由导管组件1、安装在其内腔的阻隔件2、穿刺针管3和与针管固接的操作手柄4组成。阻隔件2由密封材料组成，材料的截面上不预设孔道，穿刺针管3从截面中央纵向贯穿，撤针后的阻隔件截面又弹性恢复而不残留孔道，从而有效阻隔液体。导管组件中导管座是由透明或半透明材料制成，便于穿刺时从透明导管座内腔观察回血，而为了穿刺时血液能够流入透明导管座内腔，针管前端设有一尖端开口3.1和穿刺观察回血的侧孔3.2，这样血液通过尖端开口3.1流入针管内腔，再通过回血侧孔3.2流出，进入针管与导管之间的环隙，再流入透明导管座内腔，即可判断针尖是否刺入血管内。而这种构造留置针，在穿刺完成后撤出针管，特别在针管针头部分撤至阻隔件内，必须保证阻隔件有足够长度，能完全同时包住针管上的将端开口和回血侧孔，才不致于透明导管座内腔的血液透过针管前端内腔及回血侧孔溢出导管座外，而造成血液污染。这样足够长度的阻隔件，必然产生了阻隔件与穿过其内的针管外表面接触面积增大，自然撤针过程中摩擦阻力大大增加，给留置针操作造成诸多不便，在撤针过程中，必须小心固定住导管组件，以免撤针过程中被拔出脱离血管。In the prior art indwelling needle technique, as shown in Fig. 1, it consists of a catheter assembly 1, a barrier member 2 mounted in its inner cavity, a puncture needle tube 3, and an operating handle 4 fixed to the needle tube. The barrier member 2 is composed of a sealing material. The cross section of the material is not preset. The puncture needle tube 3 is longitudinally penetrated from the center of the cross section, and the cross section of the barrier member after the needle is removed is elastically restored without remaining the pores, thereby effectively blocking the liquid. The catheter hub of the catheter assembly is made of a transparent or translucent material to facilitate the return of blood from the lumen of the transparent catheter hub during puncture, and the blood can flow into the lumen of the transparent catheter hub for puncture. The tip of the needle is provided with a tip opening 3.1 and a puncture observation. Return the side hole 3.2 of the blood, so that the blood flows into the lumen of the needle through the tip opening 3.1, and then flows out through the blood return side hole 3.2, enters the annulus between the needle tube and the catheter, and then flows into the lumen of the transparent catheter seat to determine whether the needle tip penetrates. Intravascular. In this configuration, the indwelling needle is withdrawn after the puncture is completed, especially when the needle portion of the needle is partially withdrawn into the barrier member, and the barrier member must be of sufficient length to completely cover the end opening and the blood returning hole on the needle tube at the same time. The blood in the lumen of the transparent catheter can not pass through the lumen of the front end of the needle tube and the blood return side hole overflows outside the catheter seat, thereby causing blood pollution. Such a sufficient length of the barrier member inevitably increases the contact area between the barrier member and the outer surface of the needle tube passing therethrough, and the frictional resistance is greatly increased during the natural needle withdrawal process, which causes inconvenience to the indwelling needle operation, during the needle withdrawal process, Care must be taken to secure the catheter assembly to prevent it from being pulled out of the blood vessel during withdrawal.
发明内容Summary of the invention
本发明的目的在于克服现有技术中的不足之处，而提供一种撤针阻力较小、同时又能有效阻隔穿刺血液外露的一种具有活动封槽密封件的留置针。SUMMARY OF THE INVENTION The object of the present invention is to overcome the deficiencies in the prior art and to provide an indwelling needle having a movable sealing groove seal which has less needle withdrawal resistance and at the same time effectively blocks puncture blood exposure.
本发明的目的是通过以下途径来实现的。The object of the present invention is achieved by the following route.
一种具有活动封槽密封件的留置针，包括导管组件、安装在其内腔的阻隔件、穿刺针管和与针管固接的操作手柄，针管前端设有一尖端开口和穿刺观察回血的侧孔，侧孔位于开口的后方，开口前端点与侧孔后端点之间的距离为尖孔距离，导管座上具有侧向留置通道，其组成要点在于：阻隔件后方的导管组件的内腔中设置有一种滑动套，一种封槽密封件塞设在滑动套内腔中，密封件前端面与阻隔件后端面紧贴，密封件后端面与滑动套内侧壁贴触，滑动套外周壁与导管组件内腔壁滑动且具阻尼连接，密封件是一种弹性体，针管贯穿该密封件以及滑动套内侧壁，侧孔后方的针管上设置有一种径向凸起的环形凸卡，滑动套侧壁上设
置的穿设针管的中间孔直径介于此环形凸卡外径与针管外径之间，阻隔件长度小于尖孔距离。An indwelling needle with a movable sealing seal, comprising a catheter assembly, a barrier member mounted in the inner cavity thereof, a puncture needle tube and an operating handle fixed to the needle tube, the tip end of the needle tube is provided with a tip opening and a side hole for puncture and blood returning. The side hole is located behind the opening, the distance between the front end point of the opening and the rear end point of the side hole is a sharp hole distance, and the catheter seat has a lateral indwelling channel, the main point of which is that a cavity is arranged in the inner cavity of the catheter assembly behind the blocking member. a sliding sleeve, a sealing groove sealing member is inserted in the inner cavity of the sliding sleeve, the front end surface of the sealing member is closely attached to the rear end surface of the blocking member, the rear end surface of the sealing member is in contact with the inner side wall of the sliding sleeve, and the outer peripheral wall of the sliding sleeve and the conduit assembly The inner cavity wall slides and has a damped connection, the sealing member is an elastic body, the needle tube penetrates the sealing member and the inner side wall of the sliding sleeve, and the needle tube behind the side hole is provided with a radially convex annular convex card, the sliding sleeve side wall Set up
The diameter of the middle hole of the needle insertion tube is between the outer diameter of the annular convex card and the outer diameter of the needle tube, and the length of the barrier member is smaller than the distance of the tip hole.
这样，当穿刺置管成功后，后撤针管，针管针头部分撤至阻隔件内时，针管上回血侧孔退出阻隔件外，进入封槽密封件内，而针管尖端开口仍还在导管座内或在阻隔件内，但由于回血侧孔受到封槽密封件的密封，也就阻隔了血液通过针管尖端开口进入针管内腔，再通过回血侧孔溢出导管座外通道。继续后撤针管，直至针管回血侧孔完全进入封槽密封件内，针管上环形凸卡与密封件外滑动套内侧壁相抵，再继续后撤针管，带动密封件及滑动套一起滑移，最后针管将密封件及滑动套带出导管座内腔，封槽密封件杜绝了血液通过回血侧孔溢出污染，因而能够从容撤针操作。Thus, when the catheter is successfully inserted, the needle is withdrawn and the needle portion of the needle is partially withdrawn into the barrier, the blood-receiving side hole of the needle exits the barrier and enters the sealing seal, and the tip opening of the needle is still in the catheter holder. Or in the barrier member, but because the blood return side hole is sealed by the sealing groove seal, the blood is blocked from entering the inner lumen of the needle tube through the tip opening of the needle tube, and then overflows the outer passage of the catheter seat through the blood return side hole. Continue to withdraw the needle tube until the blood return side hole of the needle tube completely enters the sealing groove seal. The annular convex card on the needle tube abuts against the inner side wall of the outer sliding sleeve of the sealing member, and then continues to withdraw the needle tube to drive the sealing member and the sliding sleeve to slide together. The needle tube carries the sealing member and the sliding sleeve out of the lumen of the catheter seat, and the sealing groove seal prevents the blood from overflowing through the blood returning side hole, so that the needle can be easily withdrawn.
阻隔件长度越小，则撤针阻力越小越方便操作，但其至少应当大于针尖开口的长度。The smaller the length of the barrier, the less convenient the needle withdrawal resistance is, but it should be at least greater than the length of the needle tip opening.
本发明的目的还可以通过以下途径来实现：The object of the invention can also be achieved by the following means:
密封件中央贯穿针管的位置可以不设置通孔或者缝隙，也可以预设一缝隙便于针管贯穿，还可以纵向贯穿有一与针管外径稍小一点的通孔。The position of the center of the sealing member through the needle tube may not be provided with a through hole or a slit, or a slit may be preset to facilitate the penetration of the needle tube, and a through hole slightly smaller than the outer diameter of the needle tube may be longitudinally penetrated.
环形凸卡或者是一扁平状，或者是一橄榄形状。The annular convex card is either a flat shape or an olive shape.
环形凸卡后端与针管之间具有光滑斜坡形过渡。There is a smooth ramp-shaped transition between the rear end of the annular cam and the needle.
这种光滑斜坡形过渡便于针管在导管以及密封件通孔中的滑动。This smooth ramp-like transition facilitates the sliding of the needle tube in the catheter and seal through-holes.
综上所述，本发明相比现有技术具有如下优点：撤针阻力小，操作方便，同时又能有效杜绝了血液通过回血侧孔溢出污染。In summary, the present invention has the following advantages over the prior art: the needle withdrawal resistance is small, the operation is convenient, and at the same time, the blood can be effectively prevented from overflowing through the blood return side hole.
图1是现有技术中一种留置针结构示意图。1 is a schematic view showing the structure of an indwelling needle in the prior art.
图2本发明所述一种具有活动封槽密封件的留置针的结构示意图；Figure 2 is a schematic view showing the structure of an indwelling needle having a movable sealing groove seal according to the present invention;
图3是本发明中的一种针管与导管的示意图；Figure 3 is a schematic view of a needle tube and a catheter in the present invention;
图4是本发明所述一种具有活动封槽密封件的留置针的撤针状态示意图；Figure 4 is a schematic view showing the state of needle withdrawal of an indwelling needle having a movable sealing groove seal according to the present invention;
图5是本发明所述一种具有活动封槽密封件的留置针的撤针状态示意图；Figure 5 is a schematic view showing the state of needle withdrawal of an indwelling needle having a movable sealing groove seal according to the present invention;
图6是本发明所述一种具有活动封槽密封件的留置针的撤针状态示意图；Figure 6 is a schematic view showing the state of needle withdrawal of an indwelling needle having a movable sealing groove seal according to the present invention;
图7是本发明所述一种具有活动封槽密封件的留置针的撤针完毕后的状态示意图；Figure 7 is a schematic view showing the state of the indwelling needle having the movable sealing groove seal after the needle is removed;
下面结合附图对本发明进行更详尽的描述。The invention will now be described in greater detail with reference to the drawings.
最佳实施例：Best embodiment:
参照图2，一种具有活动封槽密封件的留置针，包括导管组件1、安装在其内腔的阻隔件2、
穿刺针管3和与针管固接的操作手柄4组成。阻隔件2由密封材料组成，穿刺针管3从截面中央纵向贯穿，撤针后的阻隔件截面又弹性恢复而不残留孔道，从而有效阻隔液体。导管组件中导管座是由透明或半透明材料制成，便于穿刺时从透明导管座内腔观察回血，而为了穿刺时血液能够流入透明导管座内腔，针管前端设有一尖端开口3.1和穿刺观察回血的侧孔3.2，这样血液通过尖端开口3.1流入针管内腔，再通过回血侧孔3.2流出，进入针管与导管之间的环隙，再流入透明导管座内腔，即可判断针尖是否刺入血管内。Referring to Figure 2, an indwelling needle having a movable sealing seal includes a catheter assembly 1, a barrier member 2 mounted in the lumen thereof
The puncture needle 3 is composed of an operation handle 4 fixed to the needle tube. The barrier member 2 is composed of a sealing material, and the puncture needle tube 3 is longitudinally penetrated from the center of the cross section, and the cross section of the barrier member after the needle is removed is elastically restored without remaining the pores, thereby effectively blocking the liquid. The catheter hub of the catheter assembly is made of a transparent or translucent material to facilitate the return of blood from the lumen of the transparent catheter hub during puncture, and the blood can flow into the lumen of the transparent catheter hub for puncture. The tip of the needle is provided with a tip opening 3.1 and a puncture observation. Return the side hole 3.2 of the blood, so that the blood flows into the lumen of the needle through the tip opening 3.1, and then flows out through the blood return side hole 3.2, enters the annulus between the needle tube and the catheter, and then flows into the lumen of the transparent catheter seat to determine whether the needle tip penetrates. Intravascular.
参照图3，侧孔3.2位于开口3.1的后方，开口3.1前端点与侧孔3.2后端点之间的距离为尖孔距离。侧孔3.2后方的针管上设置有一种径向凸起的环形凸卡3.3，环形凸卡3.3或者是一扁平状，或者是一橄榄形状。环形凸卡3.3后端与针管3之间具有光滑斜坡形过渡。Referring to Figure 3, the side hole 3.2 is located behind the opening 3.1, and the distance between the front end point of the opening 3.1 and the rear end point of the side hole 3.2 is the sharp hole distance. The needle tube behind the side hole 3.2 is provided with a radially convex annular convex card 3.3, which is either flat or in the shape of an olive. There is a smooth ramp-shaped transition between the rear end of the annular convex card 3.3 and the needle tube 3.
参照图2，阻隔件2后方的导管组件1的内腔中设置有一种滑动套6，一种封槽密封件5塞设在滑动套6内腔中，密封件5前端面与阻隔件2后端面紧贴，密封件5后端面与滑动套6内侧壁贴触，滑动套6外周壁与导管组件1内腔壁滑动且具阻尼连接，密封件5中央纵向贯穿有一便于针管贯穿的缝隙，滑动套6后壁上设置的穿设针管的中间孔直径介于此环形凸卡外径与针管外径之间，阻隔件长度小于尖孔距离。Referring to FIG. 2, a sliding sleeve 6 is disposed in the inner cavity of the catheter assembly 1 behind the barrier member 2, and a sealing groove sealing member 5 is plugged in the inner cavity of the sliding sleeve 6, and the front end surface of the sealing member 5 and the blocking member 2 are The rear end surface of the sealing member 5 is in contact with the inner side wall of the sliding sleeve 6. The outer peripheral wall of the sliding sleeve 6 slides with the inner wall of the catheter assembly 1 and has a damped connection. The central portion of the sealing member 5 longitudinally penetrates a slit for facilitating the penetration of the needle tube. The diameter of the middle hole of the sleeve 6 disposed on the rear wall is between the outer diameter of the annular convex card and the outer diameter of the needle tube, and the length of the barrier member is smaller than the distance between the sharp holes.
这种结构留置针内阻隔件与针管接触面积减小许多，因而两者之间轴向滑动摩擦力小了许多，尤其大规格留置针，可使得穿刺撤针操作更加轻便。在留置针穿刺血管之前，做好穿刺准备工作，当穿刺置管成功后，后撤针管，针管针头部分撤至阻隔件内时，针管上回血侧孔首先退出阻隔件外，进入封槽密封件内，如图4所示；而针管尖端开口仍还在导管座内或在阻隔件内，但由于回血侧孔受到封槽密封件的密封，也就阻隔了血液通过针管尖端开口进入针管内腔，再通过回血侧孔溢出导管座外通道。继续后撤针管，直至针管回血侧孔完全进入封槽密封件内，针管上凸卡与密封件外滑动套内侧面相抵，如图5、所示；再继续后撤针管，针管上凸卡与滑动套中间孔卡触，带动密封件及滑动套一起滑移，最后针管将密封件及滑动套带出导管座内腔，如图6、7所示，封槽密封件杜绝了血液通过回血侧孔溢出污染，因而能够从容撤针操作。The contact area between the inner retaining needle and the needle tube is much reduced, so that the axial sliding friction between the two is much smaller, especially for the large-sized indwelling needle, which makes the puncture and needle removal operation more portable. Before the indwelling needle punctures the blood vessel, the puncture preparation work is completed. When the puncture is successfully placed, the needle is removed and the needle portion of the needle is partially withdrawn into the barrier member. The blood return hole on the needle tube first exits the barrier member and enters the sealing groove seal. Inside, as shown in Figure 4; while the needle tip opening is still in the catheter hub or in the barrier, but because the blood return side hole is sealed by the sealing seal, the blood is blocked from entering the needle lumen through the needle tip opening Then, through the blood return side hole overflows the outer passage of the catheter seat. Continue to withdraw the needle tube until the blood return side hole of the needle tube completely enters the sealing groove seal. The convex card on the needle tube is opposite to the inner side surface of the sliding sleeve outside the sealing piece, as shown in Figure 5; then continue to withdraw the needle tube, the convex tube on the needle tube and The middle hole of the sliding sleeve is snapped, and the sealing member and the sliding sleeve are driven to slide together. Finally, the needle tube carries the sealing member and the sliding sleeve out of the lumen of the catheter seat, as shown in Figs. 6 and 7, the sealing sealing member prevents blood from passing through the blood returning side. The hole overflows and is contaminated, so that the needle can be easily withdrawn.
本实施例未述部分与现有技术相同。
The parts not described in this embodiment are the same as the prior art.
Claims (5)
- 一种具有活动封槽密封件的留置针，包括导管组件、安装在其内腔的阻隔件、穿刺针管和与针管固接的操作手柄，针管前端设有一尖端开口和穿刺观察回血的侧孔，侧孔位于开口的后方，开口前端点与侧孔后端点之间的距离为尖孔距离，导管座上具有侧向留置通道，其特征在于，阻隔件后方的导管组件的内腔中设置有一种滑动套，一种封槽密封件塞设在滑动套内腔中，密封件前端面与阻隔件后端面紧贴，密封件后端面与滑动套内侧壁贴触，滑动套外周壁与导管组件内腔壁滑动且具阻尼连接，密封件是一种弹性体，针管贯穿该密封件以及滑动套内侧壁，侧孔后方的针管上设置有一种径向凸起的环形凸卡，滑动套侧壁上设置的穿设针管的中间孔直径介于此环形凸卡外径与针管外径之间，阻隔件长度小于尖孔距离。An indwelling needle with a movable sealing seal, comprising a catheter assembly, a barrier member mounted in the inner cavity thereof, a puncture needle tube and an operating handle fixed to the needle tube, the tip end of the needle tube is provided with a tip opening and a side hole for puncture and blood returning. The side hole is located behind the opening, the distance between the front end point of the opening and the rear end point of the side hole is a sharp hole distance, and the catheter seat has a lateral indwelling channel, wherein the inner part of the catheter assembly behind the blocking member is provided with a kind a sliding sleeve, a sealing groove sealing member is inserted in the inner cavity of the sliding sleeve, the front end surface of the sealing member is closely attached to the rear end surface of the blocking member, the rear end surface of the sealing member is in contact with the inner side wall of the sliding sleeve, and the outer peripheral wall of the sliding sleeve and the conduit assembly are The cavity wall slides and has a damped connection. The sealing member is an elastic body. The needle tube runs through the sealing member and the inner side wall of the sliding sleeve. The needle tube behind the side hole is provided with a radially convex annular convex card on the side wall of the sliding sleeve. The diameter of the middle hole through which the needle tube is disposed is between the outer diameter of the annular convex card and the outer diameter of the needle tube, and the length of the blocking member is smaller than the distance between the sharp holes.
- 根据权利要求1所述的一种具有活动封槽密封件的留置针，其特征在于，密封件中央贯穿针管的位置或者不设置通孔或者缝隙，也或者预设一缝隙便于针管贯穿，或者纵向贯穿有一与针管外径稍小一点的通孔。The indwelling needle with the movable sealing seal according to claim 1, wherein the central portion of the sealing member penetrates the position of the needle tube or the through hole or the slit is not provided, or a slit is preset to facilitate the penetration of the needle tube or the longitudinal direction. There is a through hole that is slightly smaller than the outer diameter of the needle tube.
- 根据权利要求1所述的一种具有活动封槽密封件的留置针，其特征在于，阻隔件长度至少应当大于针尖开口的长度。An indwelling needle having a movable sealing seal according to claim 1 wherein the length of the barrier member is at least greater than the length of the opening of the needle tip.
- 根据权利要求1所述的一种具有活动封槽密封件的留置针，其特征在于，环形凸卡或者是一扁平状，或者是一橄榄形状。An indwelling needle having a movable sealing seal according to claim 1, wherein the annular convex card is either a flat shape or an olive shape.
- 根据权利要求4所述的一种具有活动封槽密封件的留置针，其特征在于，环形凸卡后端与针管之间具有光滑斜坡形过渡。 An indwelling needle having a movable sealing seal according to claim 4, wherein the annular convex card has a smooth sloped transition between the rear end of the card and the needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/094956 WO2019019168A1 (en) | 2017-07-28 | 2017-07-28 | Indwelling needle having movable grooved sealing member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/094956 WO2019019168A1 (en) | 2017-07-28 | 2017-07-28 | Indwelling needle having movable grooved sealing member |
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| WO2019019168A1 true WO2019019168A1 (en) | 2019-01-31 |
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| PCT/CN2017/094956 WO2019019168A1 (en) | 2017-07-28 | 2017-07-28 | Indwelling needle having movable grooved sealing member |
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- 2017-07-28 WO PCT/CN2017/094956 patent/WO2019019168A1/en active Application Filing
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| US4311137A (en) * | 1980-04-30 | 1982-01-19 | Sherwood Medical Industries Inc. | Infusion device |
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