WO2014169429A1 - 与体外留置导管接驳的医用输液接头 - Google Patents

与体外留置导管接驳的医用输液接头 Download PDF

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Publication number
WO2014169429A1
WO2014169429A1 PCT/CN2013/074245 CN2013074245W WO2014169429A1 WO 2014169429 A1 WO2014169429 A1 WO 2014169429A1 CN 2013074245 W CN2013074245 W CN 2013074245W WO 2014169429 A1 WO2014169429 A1 WO 2014169429A1
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WIPO (PCT)
Prior art keywords
joint
base
inner cavity
cavity
connector
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PCT/CN2013/074245
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English (en)
French (fr)
Inventor
陈永曦
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福建省百仕韦医用高分子股份有限公司
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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 CN201380075554.1A priority Critical patent/CN105228670B/zh
Priority to PCT/CN2013/074245 priority patent/WO2014169429A1/zh
Publication of WO2014169429A1 publication Critical patent/WO2014169429A1/zh

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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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • 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
    • A61M39/22—Valves or arrangement of valves
    • A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
    • A61M39/286—Wedge clamps, e.g. roller clamps with inclined guides
    • A61M39/287—Wedge formed by a slot having varying width, e.g. slide clamps

Definitions

  • the present invention relates to a device for introducing a medium into a body, and more particularly to a medical infusion connector that is coupled to an indwelling catheter.
  • the medical infusion connector consists of a connector 1 and a connector body 2 attached thereto, which is also commonly referred to as a heparin cap.
  • Infusion set needle from connector body 2
  • the top sealant plug is inserted.
  • the infusion tube is pulled out of the infusion set, the original space occupied by the needle tube is close to the vacuum, and a recompression occurs in the indwelling catheter.
  • the blood will flow back from the blood vessel into the indwelling catheter, and the blood will be blocked by the blood to block the indwelling catheter, and the infusion can not be re-infused. It may cause a blood clot that can cause harm to the patient. Therefore, the medical staff usually needs to take a sealed syringe with a puncture needle to rinse the indwelling catheter. When the sealing operation is performed, the syringe needle penetrates from the heparin cap rubber plug and enters the heparin cap lumen, which must occupy the heparin cap.
  • the medical staff needs to withdraw the sealing tube liquid while withdrawing the syringe needle, and fill the space occupied by the needle tube to avoid recompression in the indwelling catheter.
  • This kind of operation is cumbersome and still leaves the space that the sealing liquid can not be filled.
  • the negative pressure will still be generated.
  • it is customary to clamp the extension tube to the tube after the flow clamp is clamped.
  • the component slides in the direction, so that the extension tube is gradually squeezed, and the liquid in the extension tube is squeezed into the inner cavity of the indwelling catheter to drive out the backflow blood, but the sliding resistance is large when the stop clamp and the extension tube are clamped, and the extension tube is easily extended.
  • the tube is elongated and thinned.
  • the catheter assembly is pulled repeatedly, and the extension tube is severely broken to cause hemorrhage.
  • the catheter assembly is left and attached to the patient's body, and the length of the extension tube is limited. Be cautious, the catheter assembly will be pulled out of the patient's body. In order to avoid the above accidents, the medical staff should be cautious when operating. Sometimes the length of the stop clip is not enough, or the blood in the catheter can not be completely cleaned, so this operation is invisible. Increased the workload and psychological burden of medical staff.
  • the present invention aims to overcome the deficiencies of the prior art and to provide a medical infusion connector that can eliminate negative pressure and is convenient to operate and is connected to an indwelling catheter.
  • the object of the present invention is achieved by the following route.
  • the medical infusion connector connected to the extracorporeal indwelling catheter comprises a connecting seat and a joint body, and the connecting rod front end is connected with the extension tube of the indwelling duct, and the main point of the composition is that the utility model further comprises a joint base, and the joint base or the connection
  • the seat body is integrated or split, but is fixed to the connecting seat.
  • the front part of the joint body is inserted into the inner cavity of the joint base and has a device for spirally adjusting the axial displacement, between the joint body and the joint base cavity or the joint body and Between the inner cavity of the connecting seat or between the inner body of the joint body and the inner cavity of the joint base and the inner cavity of the connecting seat, there is a space in which the joint body is spirally adjusted to axially move, and the inner cavity of the joint communicates with the inner cavity of the connecting seat.
  • the inner cavity of the joint base and the connecting seat form a closed cavity, and the size of the closed cavity is changed by the joint body spirally adjusting the advancement and retreat of the axial displacement.
  • the closed cavity is enlarged; the joint body is advanced, and the closed cavity is reduced.
  • the joint body is retracted first, the closed cavity is enlarged, which is convenient for accommodating more liquid; when the infusion is finished, the needle tube is withdrawn, the joint body is advanced, and the closed cavity is enlarged from large to small, thereby filling the space occupied by the original needle tube and preventing negative Press or drain blood from the catheter into the blood vessel to eliminate negative pressure.
  • This method of preventing negative pressure and eliminating negative pressure is simple, effective, and convenient to operate.
  • the object of the present invention can also be achieved by the following means.
  • the device for adjusting the axial displacement of the spiral has a variety of specific configurations to choose from, two of which are disclosed below, one of which is:
  • the front section of the connector body is inserted into the inner cavity of the joint base and is screwed to the joint base.
  • rotating the joint body causes the joint body to spirally rotate relative to the joint base, thereby causing the joint body to advance spirally and spirally backward relative to the joint base.
  • An inner seal is disposed in front of the joint body and the joint base screw connection section.
  • the inner cavity of the joint base is a stepped cavity with a large front and a small small space.
  • the inner wall of the large cavity is provided with a screwing internal thread and a corresponding part of the connecting seat is locked, and the inner wall of the small cavity is provided with an internal thread of the advance and retreat and the joint body can be adjusted and screwed, and the inner and the backward are connected.
  • a thread is provided before the thread, and the inner seal is installed before the shoulder, and the section corresponding to the inner seal is a cylinder.
  • the front end of the joint body is a standard Luer taper section, and the corresponding passage in the inner cavity of the joint or in the inner cavity of the joint base is also a standard Luer taper.
  • This joint body is also known as the standard Lueryang joint.
  • the front end of the joint body is a standard Luer taper section, and the corresponding passage in the inner cavity of the joint seat is also a standard Luer taper.
  • the corresponding paragraph includes a portion of the joint that extends into the joint base to tighten the internal thread, and the front end of the joint body Extend into this corresponding paragraph of the connector and stretch it in here. or:
  • the joint base protrudes forwardly from the inner core of the section of the screwed internal thread, and the outer peripheral surface of the joint is a standard Luer taper section and protrudes into the inner cavity of the joint, corresponding to the inner cavity of the joint.
  • the paragraph is also a standard Luer taper and is connected with the outer peripheral surface of the stud.
  • the front end of the joint body is telescoped in the inner cavity of the joint base. As the joint body is stretched back and forth, the joint base cavity in front of the joint body is reduced accordingly. And increase.
  • Another specific configuration of the above-described apparatus for helically adjusting the axial displacement may be:
  • the joint body is composed of a screw rod and a lifting head, and the sealing rubber plug connected to the needle tube is located at the tail end of the screw rod, and the front portion of the screw rod is inserted into the inner cavity of the lifting head and spirally connected thereto, and the screw rod is also axially limited with the joint base.
  • the position is connected, and the lifting head is sleeved in the inner cavity of the joint base so as to be slidable back and forth with respect to the joint base.
  • the spiral rotation is decomposed into idling and forward and backward movement, wherein the idling is completed by the auger, and the forward and backward movement is performed by the lifting head.
  • the inner cavity of the joint base is a stepped cavity with a large front and a small small space, and the inner wall of the large cavity is provided with a screwing internal thread and a corresponding part of the connecting seat is locked, and the inner wall of the small cavity is provided with a cylindrical hole and a lifting joint for the clearance of the lifting head, the cylindrical hole
  • the length is greater than the length of the lifting head, and a shoulder is provided between the cylindrical hole and the screwing thread.
  • the front end of the lifting head is a standard Luer taper section, and the corresponding passage in the inner cavity of the connecting seat or the inner cavity of the joint base is also a standard Luer taper.
  • the thread for achieving advance and retreat adjustment is a trapezoidal thread.
  • a joint jacket is wrapped around the outer circumference of the joint and fixed to the joint body.
  • the present invention has the following advantages over the prior art: the method of preventing negative pressure and eliminating negative pressure is simple, effective, and convenient to operate.
  • FIG. 1 is a schematic structural view of an indwelling needle in the prior art
  • FIG. 2 is a schematic view showing the structure of an indwelling needle of a medical infusion connector connected to an indwelling catheter according to the present invention
  • FIG. 3 is a schematic structural view of a medical infusion connector connected to an indwelling catheter according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic structural view of a medical infusion connector connected to an indwelling catheter in accordance with Embodiment 2 of the present invention in a state in which the connector body is advanced into position.
  • FIG. 5 is a schematic view showing the structure of the medical infusion connector connected to the indwelling catheter in the second embodiment of the present invention after the connector body is retracted.
  • Figure 6 is a schematic view showing the structure of a medical infusion connector connected to an indwelling catheter in accordance with a preferred embodiment of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • an indwelling needle for a medical infusion connector connected to an indwelling catheter is provided by a connector 1 and a connector body 2 , joint base 3, sealant plug 5, extension tube 6, stop clip 7 and conduit assembly.
  • a medical infusion connector connected to an indwelling catheter including a connector 1, a connector body 2, and a connector base 3
  • the front end of the connecting seat is connected with the extension pipe 6 of the indwelling conduit, the joint base 3 and the connecting seat 1 are separately constructed but fixed to the connecting seat 1, and the front part of the joint body 2 is inserted in the inner cavity of the joint base 3 and the joint Base 3
  • the spiral connection, the joint body 2 and the inner space of the connecting seat 1 and the inner cavity of the joint base 3 have a joint body 2 spirally adjusting the axial displacement space, and the inner body of the joint body 2 communicates with the inner cavity of the connecting seat.
  • the inner cavity is a stepped cavity with a front large and a small small, and the inner wall of the large cavity is provided with a screwing internal thread and a corresponding part of the connecting seat 1 is locked, and the inner wall of the small cavity is provided with the internal thread and the joint body 2
  • the screw connection can be adjusted, and a shoulder is provided before the internal thread is advanced and retracted.
  • the section corresponding to the inner seal 4 of the joint body 2 is a cylinder.
  • Connector body 2 The front end is a standard Luer taper section, and the corresponding section in the inner cavity of the connecting seat 1 is also a standard Luer taper, and the corresponding paragraph includes a portion of the connecting seat 1 that extends into the joint base 3 to tighten the internal thread, and the joint body 2 The front end projects into this corresponding section of the connector 1 and expands and contracts there.
  • the above advance and retraction threads are a trapezoidal thread.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the medical infusion joint connected with the extracorporeal indwelling catheter includes a connecting base 1, a joint body 2 and a joint base 3
  • the front end of the connecting seat is connected to the extension pipe 6 of the indwelling catheter.
  • This embodiment is improved on the basis of the first embodiment.
  • the joint base 3 protrudes forwardly from the inner core of the section of the screwed internal thread, and the stud 31
  • the outer peripheral surface is a standard Luer taper section and extends into the inner cavity of the connecting seat 1 (not shown in the figure, refer to FIG. 3), and the corresponding passage in the inner cavity of the connecting seat 1 is also a standard Luer taper. With the stud 31 The outer peripheral surface is connected.
  • the standard Luer taper is no longer set at the front end of the joint body 2, and the front end of the joint body 2 is only telescoped in the inner cavity of the joint base 3, and the joint base in front of the joint body 2 with the front and rear expansion and contraction of the joint body 2 3
  • the cavity shrinks and increases accordingly.
  • a joint casing 9 is wrapped around the outer periphery of the joint body 2 and fixed to the joint body 2.
  • a medical infusion connector connected to an indwelling catheter including a connector 1, a connector body 2, and a connector base 3
  • the front end of the connecting seat is connected with the extension pipe 6 of the indwelling conduit, the joint base 3 and the connecting seat 1 are separately constructed but fixed to the connecting seat 1, and the front part of the joint body 2 is inserted into the inner cavity of the joint base 3, and the joint body 2
  • the inner cavity is in communication with the inner cavity of the connector.
  • the joint body is composed of a screw rod 21 and a lifting head 22, and a sealing rubber plug 5 connected to the needle tube is located at the end of the screw rod 21, and the front portion of the screw rod 21 is inserted into the lifting head 22
  • the inner cavity is spirally connected thereto, and the auger 21 is also axially connected to the joint base 3, and the lifting head 22 is sleeved in the inner cavity of the joint base 3 so as to be slidable back and forth with respect to the joint base 3.
  • Joint base 3 The inner cavity is a stepped cavity with a large front and a small small space.
  • the inner wall of the large cavity is provided with a screwing internal thread and the corresponding part of the connecting seat 1 is locked (the connecting seat 1 is not shown in the figure, refer to Fig.
  • the inner wall of the small cavity is provided with a cylindrical hole and a lifting joint 22, and the length of the cylindrical hole is larger than the length of the lifting head 22, so that the lifting head 22 or even the joint body 2 It has a space for spiral adjustment of axial displacement.
  • the front end of the lifting head 22 is a standard Luer taper section, and the corresponding section in the inner cavity of the connecting seat 1 is also a standard Luer taper.

Abstract

一种与体外留置导管接驳的医用输液接头，用于防止及消除负压。包括接头基座（3），此接头基座（3）或者与连接座（1）一体构造或者分体构造但与连接座（1）固接，接头体（2）前段插置在接头基座（3）内腔中并具有螺旋调节轴向推移的装置，接头体（2）与接头基座（3）内腔之间、或者接头体（2）与连接座（1）内腔之间、或者接头体（2）与接头基座（3）内腔以及连接座（1）内腔之间具有接头体（2）螺旋调节轴向推移的空间，接头体（2）内腔与连接座（1）内腔连通。

Description

与体外留置导管接驳的医用输液接头 说明书
技术领域
本发明涉及一种将介质引入体内的装置，特别是一种与体外留置导管接驳的医用输液接头。
背景技术
在临床医疗上，当患者需要多次输液时，通常会使用体外留置导管，人体外留置导管与输液器的驳接方式分为有针和无针驳接。现有技术中的一种有针驳接方式如图 1 所示，医用输液接头由连接座 1 以及与其固接的接头体 2 组成，这种接头体 2 通常又称为肝素帽。输液器针管从接头体 2 顶部的密封胶塞插入。输液终了拔出输液器针管的同时，针管原占据的空间接近真空从而在留置导管内产生复压，血液会从血管倒流进留置导管内，倒流血液造成血液凝固堵塞留置导管，无法再次输液，严重的可能产生血栓，给病患造成伤害。因此，医务人员通常需要取一支带有穿刺针管的封管注射器对留置导管进行冲洗封管，封管操作时注射器针管从肝素帽胶塞穿入，进入肝素帽内腔，必然占据肝素帽内腔空间，而封管结束时，医务人员需要边撤出注射器针管边推注封管液，添补针管占据的空间，以免在留置导管内形成复压。这种操作繁琐且仍然会残留封管液最终无法填补的空间，负压仍会产生，为了弥补这种不足，习惯上在别上止流夹夹紧延长管后，需要将止流夹往导管组件方向滑动，令延长管逐渐被挤压，将延长管内液体挤入留置导管内腔，赶出倒流血液，但止流夹与延长管夹紧时滑动阻力大，拉拔延长管，易将延长管拉长变细，导管组件在留置期间，经多次拉拔，严重的会拉断延长管而造成溢血，加上导管组件留置粘贴在病患身体上，延长管长度有限，要是拉拔不慎，会将导管组件拉脱离病患身体，为了避免上述事故发生，医务人员操作时谨小慎微，有时止流夹拉拔长度不够，还是不能完全保证将导管内血液驱赶干净，故这种操作方式无形增加了医护人员工作量和心理负担。
发明内容
本发明目的在于克服现有技术的不足之处而提供一种可以消除负压且操作方便的与体外留置导管接驳的医用输液接头。
本发明的目的是通过以下途径来实现的。
与体外留置导管接驳的医用输液接头，包括连接座和接头体，连接座前端与留置导管的延长管接驳，其组成要点在于：还包括一种接头基座，此接头基座或者与连接座一体构造或者分体构造但与连接座固接，接头体前段插置在接头基座内腔中并具有螺旋调节轴向推移的装置，接头体与接头基座内腔之间或者接头体与连接座内腔之间或者接头体与接头基座内腔以及连接座内腔之间具有接头体螺旋调节轴向推移的空间，接头体内腔与连接座内腔连通。
这样接头基座与连接座两者内腔构成一密闭型腔，利用接头体螺旋调节轴向推移的进退改变密闭型腔容积大小。接头体退后，密闭型腔增大；接头体推进，密闭型腔减小。输液工作时，接头体先退后，密闭型腔增大，便于容纳更多液体；输液结束针管退出同时，接头体推进，密闭型腔由大变小，从而填补原针管占据的空间，防止负压或者排出导管内血液进入血管以消除负压。这种防止负压及消除负压的方式简单、有效、操作方便。
本发明的目的还可以通过以下途径来实现。
螺旋调节轴向推移的装置有多种具体的构造可供选择，以下公开其中的两种，一种是：
接头体前段插置在接头基座内腔中并与接头基座螺旋连接。
这样，转动接头体让接头体相对接头基座螺旋转动，从而让接头体相对接头基座螺旋式前进和螺旋式后退。
接头体与接头基座螺旋连接段的前方设置有一种内密封件。
接头基座内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座对应部分锁接，小型腔内壁设置进退内螺纹与接头体可调节螺旋连接，进退内螺纹之前设置有一种挡肩，内密封件安装在此挡肩之前，接头体与此内密封件对应的段落是一种圆柱。
接头体前端是一种标准鲁尔锥度段，连接座内腔中或接头基座内腔中对应的段落也是一种标准鲁尔锥度。
这种接头体又称标准鲁尔阳接头。
接头体前端是一种标准鲁尔锥度段，连接座内腔中对应的段落也是一种标准鲁尔锥度，此对应段落包括连接座伸入到接头基座旋紧内螺纹的部分，接头体前端伸入到连接座的此对应段落并在此中伸缩。或者是：
接头基座在旋紧内螺纹的段落的内芯向前突伸一突柱，此突柱外周面是一种标准鲁尔锥度段并伸入到连接座内腔中，连接座内腔中对应的段落也是一种标准鲁尔锥度并与该突柱外周面连接，接头体前端在接头基座内腔中伸缩，随着接头体的前后伸缩，接头体前方的接头基座容腔随着相应缩小和增大。
上述螺旋调节轴向推移的装置的另一种具体构造可以是：
接头体由螺旋杆和升降头组成，与针管接驳的密封胶塞位于螺旋杆尾端，螺旋杆前段插置在升降头内腔中并与其螺旋连接，螺旋杆还与接头基座轴向限位连接，升降头以可相对接头基座前后滑移的方式套置在接头基座的内腔中。
这样，由于螺旋杆被轴向限位，螺旋转动被分解成空转和前后移动，其中空转由螺旋杆完成，前后移动则由升降头完成。
接头基座内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座对应部分锁接，小型腔内壁设置圆柱孔与升降头间隙配合套接，该圆柱孔长度大于升降头的长度，圆柱孔与旋紧螺纹之间具有一挡肩，一种内密封件安装在此挡肩之前，升降头的前端穿过此该内密封件的内孔突伸入连接座内腔中。
升降头前端是一种标准鲁尔锥度段，连接座内腔中或接头基座内腔中对应的段落也是一种标准鲁尔锥度。
上述实现进退调节的螺纹最好是一种梯形螺纹。
一种接头外套包覆在接头体外周并与接头体固接。
综上所述，本发明相比现有技术具有如下优点：防止负压及消除负压的方式简单、有效、操作方便。
附图说明
图 1 是现有技术中一种留置针的结构示意图
图 2 是使用本发明所述与体外留置导管接驳的医用输液接头的留置针结构示意图
图 3 是本发明实施例一所述与体外留置导管接驳的医用输液接头的结构示意图
图 4 是本发明实施例二所述与体外留置导管接驳的医用输液接头在接头体推进到位状态的结构示意图
图 5 是本发明实施例二所述与体外留置导管接驳的医用输液接头在接头体退后到位状态的结构示意图
图 6 是本发明最佳实施例所述与体外留置导管接驳的医用输液接头的结构示意图。
标号说明
1 连接座 2 接头体 21 螺旋杆 22 升降头
3 接头基座 31 突柱 4 内密封件 5 密封胶塞
6 延长管 7 止流夹 8 导管组件 9 接头外套。
具体实施方式
实施例一：
参照图 2 ，一种使用本发明所述与体外留置导管接驳的医用输液接头的留置针，由连接座 1 、接头体 2 、接头基座 3 、密封胶塞 5 、延长管 6 、止流夹 7 和导管组件组成。
参照图 3 ，与体外留置导管接驳的医用输液接头，包括连接座 1 、接头体 2 和接头基座 3 ，连接座前端与留置导管的延长管 6 接驳，接头基座 3 与连接座 1 分体构造但与连接座 1 固接，接头体 2 前段插置在接头基座 3 内腔中并与接头基座 3 螺旋连接，接头体 2 与连接座 1 内腔以及接头基座 3 内腔之间之间具有接头体 2 螺旋调节轴向推移的空间，接头体 2 内腔与连接座内腔连通。接头基座 3 内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座 1 对应部分锁接，小型腔内壁设置进退内螺纹与接头体 2 可调节螺旋连接，进退内螺纹之前设置有一种挡肩，内密封件 4 安装在此挡肩之前，接头体 2 与此内密封件 4 对应的段落是一种圆柱。接头体 2 前端是一种标准鲁尔锥度段，连接座 1 内腔中对应的段落也是一种标准鲁尔锥度，此对应段落包括连接座 1 伸入到接头基座 3 旋紧内螺纹的部分，接头体 2 前端伸入到连接座 1 的此对应段落并在此中伸缩。上述进退螺纹是一种梯形螺纹。
本实施例未述部分与现有技术相同。
实施例二：
参照图 4 、图 5 ，与体外留置导管接驳的医用输液接头，包括连接座 1 、接头体 2 和接头基座 3 ，连接座前端与留置导管的延长管 6 接驳，本实施例是在实施例一的基础上进行改进。接头基座 3 在旋紧内螺纹的段落的内芯向前突伸一突柱 31 ，此突柱 31 外周面是一种标准鲁尔锥度段并伸入到连接座 1 内腔中（图中未画出，可参考图 3 ），连接座 1 内腔中对应的段落也是一种标准鲁尔锥度并与该突柱 31 外周面连接。接头体 2 前端不再设置标准鲁尔锥度，而且接头体 2 前端只是在接头基座 3 内腔中伸缩，随着接头体 2 的前后伸缩，接头体 2 前方的接头基座 3 容腔随着相应缩小和增大。一种接头外套 9 包覆在接头体 2 外周并与接头体 2 固接。
本实施例未述部分与实施例一相同。
最佳实施例：
参照图 6 ，与体外留置导管接驳的医用输液接头，包括连接座 1 、接头体 2 和接头基座 3 ，连接座前端与留置导管的延长管 6 接驳，接头基座 3 与连接座 1 分体构造但与连接座 1 固接，接头体 2 前段插置在接头基座 3 内腔中，接头体 2 内腔与连接座内腔连通。接头体由螺旋杆 21 和升降头 22 组成，与针管接驳的密封胶塞 5 位于螺旋杆 21 尾端，螺旋杆 21 前段插置在升降头 22 内腔中并与其螺旋连接，螺旋杆 21 还与接头基座 3 轴向限位连接，升降头 22 以可相对接头基座 3 前后滑移的方式套置在接头基座 3 的内腔中。接头基座 3 内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座 1 对应部分锁接（连接座 1 图中未画出，可参考图 2 、图 3 ），小型腔内壁设置圆柱孔与升降头 22 间隙配合套接，该圆柱孔长度大于升降头 22 的长度，从而使升降头 22 乃至接头体 2 具有螺旋调节轴向推移的空间。圆柱孔与旋紧螺纹之间具有一挡肩，一种内密封件 4 安装在此挡肩之前，升降头的前端穿过此该内密封件 4 的内孔突伸入连接座 1 内腔中。升降头 22 前端是一种标准鲁尔锥度段，连接座 1 内腔中对应的段落也是一种标准鲁尔锥度。
本实施例未述部分与实施例一相同。

Claims (11)

  1. 与体外留置导管接驳的医用输液接头，包括连接座和接头体，连接座前端与留置导管的延长管接驳，其特征在于，还包括一种接头基座，此接头基座或者与连接座一体构造或者分体构造但与连接座固接，接头体前段插置在接头基座内腔中并具有螺旋调节轴向推移的装置，接头体与接头基座之间或者接头体与连接座内腔之间或者接头体与接头基座内腔以及连接座内腔之间具有接头体螺旋调节轴向推移的空间，接头体内腔与连接座内腔连通。
  2. 根据权利要求 1 所述的与体外留置导管接驳的医用输液接头，其特征在于，接头体前段插置在接头基座内腔中并与接头基座螺旋连接。
  3. 根据权利要求 2 所述的与体外留置导管接驳的医用输液接头，其特征在于，接头体与接头基座螺旋连接段的前方设置有一种内密封件。
  4. 根据权利要求 1 所述的与体外留置导管接驳的医用输液接头，其特征在于，接头基座内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座对应部分锁接，小型腔内壁设置进退内螺纹与接头体可调节螺旋连接，进退内螺纹之前设置有一种挡肩，内密封件安装在此挡肩之前，接头体与此内密封件对应的段落是一种圆柱。
  5. 根据权利要求 1 或 4 所述的与体外留置导管接驳的医用输液接头，其特征在于，接头体前端是一种标准鲁尔锥度段，连接座内腔中或接头基座内腔中对应的段落也是一种标准鲁尔锥度。
  6. 根据权利要求 5 所述的与体外留置导管接驳的医用输液接头，其特征在于，接头体前端是一种标准鲁尔锥度段，连接座内腔中对应的段落也是一种标准鲁尔锥度，此对应段落包括连接座伸入到接头基座旋紧内螺纹的部分，接头体前端伸入到连接座的此对应段落并在此中伸缩。
  7. 根据权利要求 5 所述的与体外留置导管接驳的医用输液接头，其特征在于，接头基座在旋紧内螺纹的段落的内芯向前突伸一突柱，此突柱外周面是一种标准鲁尔锥度段并伸入到连接座内腔中，连接座内腔中对应的段落也是一种标准鲁尔锥度并与该突柱外周面连接，接头体前端在接头基座内腔中伸缩，随着接头体的前后伸缩，接头体前方的接头基座容腔随着相应缩小和增大。
  8. 根据权利要求 1 所述的与体外留置导管接驳的医用输液接头，其特征在于，接头体由螺旋杆和升降头组成，与针管接驳的密封胶塞位于螺旋杆尾端，螺旋杆前段插置在升降头内腔中并与其螺旋连接，螺旋杆还与接头基座轴向限位连接，升降头以可相对接头基座前后滑移的方式套置在接头基座的内腔中。
  9. 根据权利要求 8 所述的与体外留置导管接驳的医用输液接头，其特征在于，接头基座内腔为一种前大后小的阶梯型腔，大型腔内壁设置旋紧内螺纹与连接座对应部分锁接，小型腔内壁设置圆柱孔与升降头间隙配合套接，该圆柱孔长度大于升降头的长度，圆柱孔与旋紧螺纹之间具有一挡肩，一种内密封件安装在此挡肩之前，升降头的前端穿过此该内密封件的内孔突伸入连接座内腔中。
  10. 根据权利要求 8 所述的与体外留置导管接驳的医用输液接头，其特征在于，升降头前端是一种标准鲁尔锥度段，连接座内腔中或接头基座内腔中对应的段落也是一种标准鲁尔锥度。
  11. 根据权利要求 1 所述的与体外留置导管接驳的医用输液接头，其特征在于，一种接头外套包覆在接头体外周并与接头体固接。
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