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WO2019024073A1 - 一种安全留置针 - Google Patents

一种安全留置针 Download PDF

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Publication number
WO2019024073A1
WO2019024073A1 PCT/CN2017/095961 CN2017095961W WO2019024073A1 WO 2019024073 A1 WO2019024073 A1 WO 2019024073A1 CN 2017095961 W CN2017095961 W CN 2017095961W WO 2019024073 A1 WO2019024073 A1 WO 2019024073A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
syringe
soft
puncture
puncture needle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/095961
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English (en)
French (fr)
Inventor
张兢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Medfaith Medical Devices Co Ltd
Original Assignee
Anhui Medfaith Medical Devices Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201710657165.XA external-priority patent/CN107469189A/zh
Priority claimed from CN201720963222.2U external-priority patent/CN208726430U/zh
Application filed by Anhui Medfaith Medical Devices Co Ltd filed Critical Anhui Medfaith Medical Devices Co Ltd
Publication of WO2019024073A1 publication Critical patent/WO2019024073A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Definitions

  • the invention discloses a safe indwelling needle and belongs to the technical field of medical equipment.
  • Indwelling needle refers to a needle that penetrates into a blood vessel for a long time and can be placed in a blood vessel for a long time, which can alleviate the pain of multiple injections of patients, especially for patients with edema.
  • Intravenous indwelling needle is a commonly used medical device in nursing work, which has the advantages of convenient use and reduced the number of punctures for patients, thereby reducing the repeated puncture during clinical infusion, reducing the puncture pain of the patient and the workload of the clinical nursing staff, thus It has been widely used in today's clinical practice.
  • intravenous indwelling needles generally include: a puncture needle, an indwelling needle, and an infusion catheter.
  • a puncture needle In use, first, the user inserts the puncture needle through the infusion needle into the injection position of the patient, and then introduces the indwelling needle into the patient's blood vessel through the puncture needle guide, and finally, the puncture needle is withdrawn, leaving the indwelling needle in the patient's blood vessel, and using Apply the film to fix it.
  • an infusion tube is placed in the indwelling needle for dripping.
  • the invention discloses a low-cost, safe and easy-to-operate indwelling needle, which reduces the situation that the hard needle tube of the indwelling needle is pulled out, stabbed by others, or causes medical personnel to cross-infect or even use the indwelling needle again.
  • a safety indwelling needle of the present invention includes a cap, a clamping member, a syringe, an inner stopper, a soft needle, a soft needle hub, a puncture needle, a needle hub, a hose, a sleeve and a sleeve.
  • the cap is slidably engaged with the syringe, and the clamping member is mounted on the syringe.
  • the inner plug is fixedly mounted in the syringe.
  • the soft needle is integrally formed with the soft needle hub.
  • the soft needle is set in the inner plug, and the soft needle is Also fixedly mounted in the syringe, the puncture needle is fixedly mounted with the puncture needle hub and the hose, the puncture needle is slidably engaged with the syringe, the puncture needle is slidably engaged with the soft needle, and one end of the sleeve is connected with the hose
  • the buckle is connected, and the other end of the sleeve is fixed to the sleeve bolt.
  • the front end of the barrel is provided with a butterfly wing fixing device, and the needle barrel is provided with at least one elastic piece and at least one surface protrusion in a circumferential direction, and the elastic piece and the surface protrusion are spaced apart.
  • each of the elastic pieces is provided with a hook member.
  • the outer surface of the front end of the puncture needle holder is provided with a first buckle groove, a convex portion and a second buckle groove.
  • the cap is a circular vertebral body having a small diameter at the front end and a large diameter at the rear end.
  • the front end of the outer surface of the cap is provided with a plurality of vertical protrusions, and the inner surface of the rear end of the cap is provided with a bead.
  • the clamping member is provided with a butterfly-shaped clamping body and a clamping protrusion, and the butterfly-shaped clamping body is integrally formed with the clamping protrusion.
  • the syringe is a cylinder having a small diameter at the front end and a large diameter at the rear end; the front end of the syringe is recessed inwardly with a circular hole having the same center of the syringe, the diameter of the circular hole being larger than the diameter of the soft needle needle;
  • the outer surface of the front end of the barrel is sequentially provided with a first protrusion, a second protrusion and a third protrusion; the first protrusion, the second protrusion and the third protrusion of the front end of the barrel and the inner surface of the rear end of the cap are convex Slip fit.
  • the butterfly wing fixing device is provided with a plurality of curved hooks, one end of the mounting joint is integrally formed with the syringe, and the curved hook of the other end of the mounting joint is buckled on the convex hole of the clamping protrusion. Inside the station.
  • the rear end of the syringe is provided with a stopper.
  • the length of the puncture needle is greater than the length of the soft needle; the length of the syringe is greater than the length of the puncture needle.
  • the invention also discloses a method for using the safety indwelling needle.
  • the puncture needle and the soft needle are opened into the part to be treated, the sleeve body, the puncture needle and the puncture needle holder are outwardly moved away from the syringe by pulling the sleeve. Sliding, the puncture needle gradually leaves the soft needle and enters the inner cavity of the syringe, and after the soft needle leaves the portion to be treated, the puncture needle seat gradually moves backward, and the hook member under the elastic piece of the syringe is trapped in the first buckle groove and behind the syringe barrel.
  • the end body is also buckled into the second buckle groove of the puncture needle seat, so that the puncture needle seat can no longer undergo axial displacement under the blocking action of the first convex portion of the puncture needle seat.
  • the indwelling needle of the present invention has a simple structure and a clever design.
  • the plurality of convex rings are arranged on the inner surface of the cap, and the first protruding portion, the second protruding portion and the third protruding portion are disposed at the front end of the barrel, and the sliding force of the cap and the syringe is large.
  • the cap will not be scattered randomly, avoiding the danger of puncture needle sticking or contamination.
  • the puncture needle tube is retracted into the syringe, and the axial displacement does not occur again, so that the puncture needle is safely stored, thereby reducing safety hazards.
  • the indwelling needle of the invention is simple and convenient to use, convenient and quick to remove the needle, and convenient to externally connect other syringes or infusions.
  • the indwelling needle of the invention has low production cost and good generalization.
  • FIG. 2 Schematic diagram of the assembly structure of the indwelling needle
  • Figure 7 Schematic diagram of the three-dimensional structure of the syringe
  • Figure 8 A-A cross-section of the indwelling needle when not in use
  • Figure 9 Cross section of the indwelling needle B-B when not in use
  • Figure 10 is a perspective view of the indwelling needle when in use
  • Figure 11 is a cross-sectional view of the A-A surface of the indwelling needle after use
  • FIG. 12 Schematic diagram of the indwelling needle B-B after use.
  • the front end refers to a direction that coincides with the direction of the needle tip of the indwelling needle, and the rear end is the opposite direction of the front end.
  • a safety indwelling needle includes a cap (1), a clamping member (2), a syringe (3), an inner stopper (4), a soft needle (5), a soft needle hub (6), a puncture needle (7), Puncture needle hub (8), hose (9), sleeve (10) and sleeve (11).
  • the cap (1) is slidably engaged with the syringe (3), the clamping member (2) is mounted on the syringe (3), the inner plug (4) is fixed in the syringe (3), and the soft needle (5) is soft.
  • the needle hub (6) is fixedly mounted, and the soft needle (5) is fixedly mounted in the syringe (3), and the puncture needle (7) is fixedly mounted together with the needle hub (8) and the hose (9).
  • the puncture needle (7) is slidably engaged with the syringe (3), and the puncture needle (7) is slidably engaged with the soft needle (5), and one end of the sleeve body (10) is snap-connected with the puncture needle hub (8).
  • the other end of the sleeve (10) is bolted to the sleeve (11).
  • the cap (1) is a circular vertebral body having a small front end diameter and a large rear end diameter, and the front end of the outer surface of the cap (1) is provided with a plurality of vertical protrusions, and the cap (1) The inner surface of the rear end is provided with a plurality of beads in turn.
  • the protrusion is provided on the outer surface of the cap to increase the surface friction of the cap.
  • the clamping member (2) is provided with a butterfly-shaped clamping body (21) and a clamping protrusion (22), a butterfly-shaped clamping body (21) and a clamping protrusion (22).
  • the clamping protrusion is provided with a circular hole which is recessed inward.
  • the syringe (3) of the present embodiment is a cylinder having a small front end diameter and a large rear end diameter.
  • the front end of the barrel is recessed inwardly with a circular hole having the same center as the barrel, and the diameter of the circular hole is larger than the diameter of the soft needle tube.
  • the front end of the front end of the barrel is provided with a first protrusion (31), a second protrusion (32) and a third protrusion (33), and the first protrusion (31) and the second protrusion (32) And the third protrusion (33) is in sliding engagement with the bead of the inner surface of the rear end of the cap.
  • the inner surface of the rear end of the cap and the outer surface of the front end of the barrel are designed to increase the surface friction so that the cap is not easily dropped, thereby preventing the puncture needle from stabbing others and reducing cross infection.
  • the front end of the syringe of the present embodiment is provided with a butterfly wing fixing device (34), and the butterfly wing fixing device (34) is provided with a plurality of curved hooks.
  • One end of the butterfly wing fixture (34) is integrally formed with the syringe (3), and the other end of the fixing device (34) is snapped into the boss of the clamping projection (22).
  • the barrel of this embodiment is provided with two elastic pieces (35) and two surface protrusions (37) in the circumferential direction, and the elastic piece (35) and the surface protrusions (37) are spaced apart.
  • the shrapnel and the syringe are integrally formed, one side of the shrapnel is connected with the syringe, and the other three sides are not connected with the syringe, so that the shrapnel can be deformed in a certain margin in the radial direction.
  • a stopper (36) is formed at the rear end of the barrel opposite to the elastic piece.
  • the three surface protrusions integrally formed on the surface of the barrel body are designed to increase the surface friction of the barrel, and the medical staff does not easily slide down when holding the needle barrel.
  • the indwelling needle of this embodiment is provided with a member (38) on the lower surface of the rear end of each of the elastic pieces (35).
  • a first buckle groove (81), a convex portion (82) and a second buckle groove (83) are sequentially disposed on the outer surface of the front end of the puncture needle holder.
  • the first buckle groove (81), the protrusion portion (82) and the second buckle groove (83) are coaxially disposed.
  • the first member (38) of the lower surface of the barrel elastic piece can be just inserted into the first buckle groove (81), and the stopper body (36) at the rear end of the barrel can be just embedded. Inside the second buckle groove (83).
  • the length of the puncture needle (7) of the indwelling needle of the present embodiment is larger than the length of the soft needle (5); the length of the syringe (3) is larger than the length of the puncture needle (7).
  • This design allows the puncture needle to penetrate the soft needle and expose part of the puncture needle and the puncture needle to easily enter the part of the patient to be treated. When the puncture needle is completely withdrawn into the syringe, the length of the syringe is larger than the puncture needle. This design allows the puncture needle to "fall back".
  • the puncture needle (7) completely penetrates the soft needle (5), and the needle tip is exposed, and most of the puncture needle hub (8) is also covered in the syringe (3), and the cap ( 1) The condom is on the syringe (3).
  • the puncture needle (7) and the soft needle (5) are removed by pulling the sleeve (11).
  • the puncture needle hub (8) slides outwardly away from the syringe (3), the puncture needle (7) gradually leaves the soft needle and enters the inner cavity of the syringe, and the soft needle (5) is retained in the blood vessel.
  • the puncture needle holder (8) gradually moves backward, and the elastic piece (35) undergoes a radial upward deformation under the action of the protrusion on the surface of the puncture needle hub (8), and then gradually pulls the sleeve (11), in the barrel spring piece (35)
  • the lower hook member (38) is caught in the first buckle groove (81), and the stopper body (36) at the rear end of the syringe barrel is also inserted into the second buckle groove (83) of the puncture needle holder, at the puncture needle seat Under the blocking action of the first convex portion (82), the axial position of the puncture needle holder is no longer allowed to occur.
  • the butterfly-shaped grip is fixed to the surface of the patient's skin by a medical tape.
  • the indwelling needle of the embodiment has a simple structure, a cap, a holding member, a syringe, a soft needle and a soft needle hub, and the puncture needle and the puncture needle are integrally formed structures, so that the cost of manufacturing each component is low.
  • the puncture needle tube is completely retracted into the syringe, thereby forming an indwelling needle of a safe structure.
  • the above-mentioned indwelling needle is easy to operate and has a good generalization.

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

一种结构安全的留置针，包括盖帽(1)、夹持部件(2)、针筒(3)、内塞(4)、软针(5)、软针针座(6)、穿刺针(7)、穿刺针针座(8)、软管(9)、套体(10)和套座(11)。盖帽(1)与针筒(3)通过滑动配合，夹持部件(2)安装在针筒(3)上，内塞(4)安装在针筒(3)内，软针(5)与软针针座(6)一体成型，该软针(5)套装在内塞(4)内，该软针(5)固定安装在针筒(3)内；穿刺针(7)与穿刺针针座(8)和软管(9)固定连接，穿刺针(7)与针筒(3)滑动配合，穿刺针(7)与软针(5)滑动配合；套体(10)的一端与穿刺针针座(8)卡扣连接，套体(10)的另一端与套座(11)螺栓固定。当将穿刺针(7)抽出后，针筒(3)的钩件(38)陷入穿刺针针座(8)的扣槽(81)内以形成锁紧状态，使穿刺针(7)包裹在针筒(3)内。该留置针使用简单便捷、进针退针方便快捷，生产成本低，具有很好的推广性。

Description

一种安全留置针 一种安全留置针
技术领域
本发明公开一种安全的留置针，属于医疗器材技术领域。
背景技术
留置针是指长期打吊瓶时一次刺入血管、可长时间留置在血管中的针头，可以减轻患者多次注射的痛苦，特别对于出现浮肿的患者
静脉留置针是护理工作中的常用医疗器械，具有使用方便，减少对患者穿刺次数的作用，从而也减少了临床输液时反复穿刺，降低了病人的穿刺痛苦以及临床护理人员的工作量，因而在当今的临床中已经获得广泛应用。
现有的静脉留置针中，一般包括 ：穿刺针、留置针以及输液导管。 使用时，首先，使用者将穿刺针联通留置针插入患者的注射位置，然后，通过穿刺针导引将留置针导入患者血管，最后，将穿刺针抽出，使留置针留在患者血管中，并用敷贴贴膜固定。使用时，将一输液管穿设于留置针内进行点滴。
发明内容
本发明公开一种成本低、安全易操作的留置针，减少留置针的硬针管被抽出后、刺伤他人、或造成医务人员交叉感染、甚至再次使用留置针的情况。
本发明的一种安全留置针包括盖帽、夹持部件、针筒、内塞、软针、软针针座、穿刺针、穿刺针针座、软管、套体和套座。
该盖帽与针筒滑动配合，夹持部件安装在针筒上，该内塞固定安装在针筒内，该软针与软针针座一体成形，该软针套装在内塞内，且软针也固定安装在针筒内，该穿刺针与穿刺针针座和软管固定安装在一起，该穿刺针与针筒滑动配合，该穿刺针与软针滑动配合，该套体的一端与软管卡扣连接，该套体的另一端与套座螺栓固定。
该针筒前端设有蝴蝶翼固定装置，该针筒沿圆周方向设置至少一个弹片和至少一个表面凸起，该弹片和表面凸起间隔设置。
所述每一弹片的下表面设有一钩件。
该穿刺针座前端的外表面设有第一扣槽、凸起部和第二扣槽。
具体地，所述盖帽为前端直径小、后端直径大的圆椎体，该盖帽外表面的前端设置数条竖状凸起，该盖帽后端的内表面设置凸圈。
具体地，所述夹持部件设有蝴蝶状夹持体和夹持凸起，该蝴蝶状夹持体与夹持凸起一体成型。
具体地，所述针筒为前端直径小、后端直径大的筒体；该针筒前端向内凹设与针筒同圆心的圆孔，该圆孔直径大于软针针管的直径；该盖该针筒前端外表面依次设置第一突起部、第二突起部和第三突起部；该针筒前端的第一突起部、第二突起部和第三突起部与盖帽后端内表面的凸圈滑动配合。
具体地，所述蝴蝶翼固定装置设有多片弧形挂钩，该安装接头的一端与针筒一体成型，该安装接头的另一端的弧形挂钩卡扣在夹持凸起的圆孔的凸台内。
具体地，针筒后端设有挡体。
具体地，所述穿刺针的长度大于软针的长度；所述针筒的长度大于穿刺针的长度。
本发明还公开了安全留置针的使用方法，打开盖帽、穿刺针和软针进入需要处理的部位后，通过抽拉套座使套体、穿刺针以及穿刺针座沿着远离针筒方向向外滑动，穿刺针逐渐离开软针而进入针筒内腔，而软针留置需要处理的部位后，穿刺针座逐渐向后移动、针筒弹片下的钩件陷入第一扣槽内、针筒后端的挡体也扣入穿刺针座的第二扣槽内，在穿刺针座的第一凸起部的阻挡作用下，使得穿刺针座不得再发生轴向位移。
有益效果：
本发明的留置针结构简单、设计巧妙，通过在盖帽内表面设置多处凸圈、针筒前端设置第一突起部、第二突起部以及第三突起部，盖帽和针筒滑动摩擦力大，使得盖帽不会随意散落，避免安全穿刺针刺伤或污染的隐患。
留置针使用后、穿刺针针管退入针筒内，也不会再次发生轴向位移，使得穿刺针安全存放，进而降低安全隐患。
本发明的留置针使用简单便捷、进针退针方便快捷，同时方便外接其他注射器或输液，本发明的留置针生产成本低，具有很好的推广性。
附图说明
图1 留置针立体拆分图
图2 留置针组装结构示意图
图3 留置针俯视图
图4 留置针组装后剖面图
图5 盖帽剖面图
图6 夹持部立体图
图7 针筒立体结构示意图
图8 未使用时留置针A-A面剖面图
图9 未使用时留置针B-B面剖面图
图10使用时留置针立体示意图
图11 使用后留置针A-A面剖面示意图
图12 使用后留置针B-B剖面示意图 。
附图标记
1-盖帽、2-夹持部件、3-针筒、4-内塞、5-软针、6-软针座、7-穿刺针、8-穿刺针座、9-软管、10-套体、11-套座
21-夹持件蝴蝶部、22-夹持件凸起
31-第一突起部、32-第二突起部、33-第三突起部、34蝴蝶翼固定座、35-弹片、36-挡体、37-表面突起、38-钩件
81-第一扣槽、82-第一凸起部、83-第二扣槽
具体实施方式
以下通过具体实施例对本发明的技术方案作进一步阐述，其中所涉及的具体表述不作为本发明技术方案的限定，本领域技术人员在明白技术方案的基础上，所做的任何改进都属于本发明的保护范围。
本发明技术方案及实施例所指前端是指与留置针针尖方向一致的方向，而后端是前端的相反方向。
如图1、图2、图3和图4所示的留置针结构。一种安全留置针包括盖帽（1）、夹持部件（2）、针筒（3）、内塞（4）、软针（5）、软针针座（6）、穿刺针（7）、穿刺针针座（8）、软管（9）、套体（10）和套座（11）。
该盖帽（1）与针筒（3）滑动配合，夹持部件（2）安装在针筒（3）上，内塞（4）固定在针筒（3）内，软针（5）与软针针座（6）固定安装，该软针（5）固定安装在针筒（3）内，该穿刺针（7）与穿刺针针座（8）和软管（9）固定安装在一起，该穿刺针（7）与针筒（3）滑动配合，同时穿刺针（7）与软针（5）滑动配合，该套体（10）的一端与穿刺针针座（8）卡扣连接，该套体（10）的另一端与套座（11）螺栓固定。
如图5所示：本实施例中盖帽（1）为前端直径小、后端直径大的圆椎体，该盖帽（1）外表面的前端设置数条竖状凸起，该盖帽（1）后端的内表面依次设置多个凸圈。在盖帽外表面设置凸起是为了增加盖帽的表面摩擦力。
如图6所示：本实施例中夹持部件（2）设有蝴蝶状夹持体（21）和夹持凸起（22），蝴蝶状夹持体（21）与夹持凸起（22）一体成型，夹持凸起设有一个向内凹陷的圆孔。
如图7所示：本实施例的针筒（3）为前端直径小、后端直径大的筒体。该针筒前端向内凹设与针筒同圆心的圆孔，该圆孔直径大于软针针管的直径。该盖该针筒前端外表面依次设置第一突起部（31）、第二突起部（32）和第三突起部（33），该第一突起部（31）、第二突起部（32）和第三突起部（33）与盖帽后端内表面的凸圈滑动配合。上述盖帽后端内表面和针筒前端外表面的设计以增大表面摩擦，使得盖帽不容易掉落，进而避免穿刺针刺伤他人且降低交叉感染。
如图4所示：本实施例的针筒前端设有蝴蝶翼固定装置（34），该蝴蝶翼固定装置（34）设有多片弧形挂钩。该蝴蝶翼固定装置的（34）的一端与针筒（3）一体成型，该固定装置（34）的另一端卡扣在夹持凸起（22）的凸台内。
本实施例的针筒沿圆周方向设置两个弹片（35）和两个表面凸起（37），弹片（35）和表面凸起（37）间隔设置。弹片与针筒是一体成型，弹片的一边与针筒相连接，另三边与针筒不相连，这样使得弹片在径向方向可以做一定裕度的形变。与弹片相对处的针筒的后端形成一个挡体（36）。在针筒筒体表面一体成型的三个表面凸起是为了增加针筒的表面摩擦，当医护人员手持针筒不会轻易滑落。
由涂8可以看出：本实施例的留置针弹片的第一构件（38）与穿刺针针座表面上第一扣槽（81）、凸起部（82）和第二扣槽（83）为同轴设置。
本实施例的留置针在每一个弹片（35）的后端下表面设有一个构件（38）。在穿刺针座前端的外表面依次设有第一扣槽（81）、凸起部（82）和第二扣槽（83）。第一扣槽（81）、突起部（82）和第二扣槽（83）是同轴设置。由图11可以看出，当留置针使用时，针筒弹片下表面的第一构件（38）能正好嵌入第一扣槽（81）内，针筒后端的挡体（36）也能正好嵌入第二扣槽（83）内。
本实施例的留置针的穿刺针（7）的长度大于软针（5）的长度；针筒（3）的长度大于穿刺针（7）的长度。这样设计使得穿刺针能贯穿软针且露出部分穿刺针、穿刺针能很容易进入患者需要处理的部位。而当穿刺针完全退出进入针筒内，针筒长度大于穿刺针，这样的设计使得穿刺针能“全身而退”。
本实施例的留置针未使用时，穿刺针（7）完全贯穿软针（5），且露出针尖，穿刺针针座（8）的大部分也包覆在针筒（3）内，盖帽（1）安全套在针筒（3）上。
在具体使用时，打开盖帽（1）、穿刺针（7）和软针（5）进入需要处理的部位后，通过抽拉套座（11）使套体（10）、穿刺针（7）以及穿刺针座（8）沿着远离针筒（3）方向向外滑动，穿刺针（7）逐渐离开软针而进入针筒内腔，而软针（5）留置在血管内。穿刺针座（8）逐渐向后移动、弹片（35）在穿刺针针座（8）表面的突起部作用下发生径向向上的形变，然后逐渐抽拉套座（11），在针筒弹片（35）下的钩件（38）陷入第一扣槽（81）内、针筒后端的挡体（36）也扣入穿刺针座的第二扣槽（83）内，在穿刺针座的第一凸起部（82）的阻挡作用下，使得穿刺针座不得再发生轴向位移。通过医学胶带将蝴蝶状夹持部固定在患者皮肤表面。
本实施例的留置针结构简单、盖帽、加持部件、针筒、软针与软针针座，穿刺针与穿刺针都是一体成型的结构，使得制作各部件成本低。留置针使用后，穿刺针针管完全退入针筒内，进而形成一种安全结构的留置针。上述留置针易操作，具有很好的推广性。

Claims (9)

  1. 一种安全留置针，其特征在于：其包括盖帽（1）、夹持部件（2）、针筒（3）、内塞（4）、软针（5）、软针针座（6）、穿刺针（7）、穿刺针针座（8）、软管（9）、套体（10）和套座（11）；
    该盖帽（1）与针筒（3）滑动配合，该夹持部件（2）安装在针筒（3）上，该内塞固定安装在在针筒（3）内，该软针（5）与软针针座（6）一体成形，该软针（5）套装在内塞（4）内，同时该软针（5）与针筒（3）滑动配合，该穿刺针（7）与穿刺针针座（8）和软管（8）固定安装在一起，该穿刺针（7）与针筒（3）滑动配合，该穿刺针（7）与软针（5）滑动配合，该套体（10）的一端与穿刺针针座（8）卡扣连接，该套体（10）的另一端与套座（11）螺栓固定；
    所述针筒前端设有蝴蝶翼固定装置（34），该针筒沿圆周方向设置至少一个弹片（35）和至少一个表面凸起（37），该弹片（35）和表面凸起（37）间隔设置；所述每一弹片（35）的下表面设有一钩件（38）；
    该穿刺针座（8）前端的外表面设有第一扣槽(81)、凸起部（82）和第二扣槽（83）。
  2. 根据权利要求1所述的安全留置针，其特征在于：所述盖帽（1）为前端直径小、后端直径大的圆椎体，该盖帽（1）外表面的前端设置数条竖状凸起，该盖帽（1）后端的内表面依次设置多个凸圈。
  3. 根据权利要求1所述的安全留置针，其特征在于：所述夹持部件（2）设有蝴蝶状夹持体（21）和夹持凸起（22），该蝴蝶状夹持体（21）合夹持凸起（22）一体成型。
  4. 根据权利要求1所述的安全留置针，其特征在于：所述针筒（3）为前端直径小、后端直径大的筒体；该针筒前端向内凹设与针筒同圆心的圆孔，该圆孔直径大于软针针管的直径。
  5. 根据权利要求1所述的安全留置针，其特征在于：所述蝴蝶翼固定装置（34）设有多片弧形挂钩，该安装接头（34）的一端与针筒（3）一体成型，该安装接头（34）的另一端的弧形挂钩卡扣在夹持凸起（22）圆孔的凸台内。
  6. 根据权利要求1所述的安全留置针，其特征在于：所述针筒（3）后端设有挡体（36）。
  7. 根据权利要求1所述的安全留置针，其特征在于：所述穿刺针（7）的长度大于软针（5）的长度。
  8. 根据权利要求1所述的安全留置针，其特征在于：所述针筒（3）的长度大于穿刺针（7）的长度。
  9. 根据权利要求1~8所述的一种安全留置针的使用方法，其特征在于：打开盖帽（1）、穿刺针（7）和软针（3）进入需要处理的部位后，通过抽拉套座（11）使套体（10）、穿刺针（7）以及穿刺针座（8）沿着远离针筒（3）方向向外滑动，穿刺针（7）逐渐离开软针（5）而进入针筒（3）内腔，而软针（5）留置需要处理的部位后，穿刺针座（8）逐渐向后移动、针筒弹片（35）下的钩件（38）陷入第一扣槽（81）内、针筒后端的挡体（36）也扣入穿刺针座的第二扣槽（83）内，在穿刺针座的第一凸起部（82）的阻挡作用下，使得穿刺针（7）被锁在针筒（3）内。
PCT/CN2017/095961 2017-08-03 2017-08-04 一种安全留置针 Ceased WO2019024073A1 (zh)

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US6325781B1 (en) * 1998-10-20 2001-12-04 Mitsubishi Pencil Kabushiki Kaisha Puncturing device
CN2810623Y (zh) * 2005-07-21 2006-08-30 威海洁瑞医用制品有限公司 密闭式安全静脉留置针
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