WO2015154301A1

WO2015154301A1 - Medical switch connector

Info

Publication number: WO2015154301A1
Application number: PCT/CN2014/075144
Authority: WO
Inventors: 陈永曦
Original assignee: 福建省百仕韦医用高分子股份有限公司
Priority date: 2014-04-11
Filing date: 2014-04-11
Publication date: 2015-10-15

Abstract

A medical switch connector for use in liquid diversion, convergence, injection, drawing, and drainage in medical procedures. Infusion connectors (4) of the medical switch connector are sealedly connected to a corresponding part of a connector base (1) in a way that allows movements relative to the connector base (1). A valve that opens or closes with movements of the infusion connectors (4) relative to the connector base (1) is bridged between an infusion channel (4.1) of the inner core of the infusion connectors (4) and a solution-transferring cavity (1.3) of the inner core of the connector base (1). The infusion channels (4.1) are in communication with a solution-outlet channel (1.2) of the inner core of a solution-outlet connector via the valve and the solution-transferring cavity (1.3). Based on such structure, when a penetrating needle is withdrawn at the completion of an infusion, no negative pressure is generated and a medicinal solution injection channel can be closed off, thus allowing for intermittent infusion. The three-way connector can be used in a swapped direction, that is, the solution-outlet connector is used as the infusion connectors (4), while the infusion connectors (4) are used as the solution-outlet connector; this is applicable in a scenario of medicinal solution diversion, that is, one extremity is used for solution supply, while multiple extremities are used for solution output.

Description

Medical switch connector

Instruction content

技术领域 Technical field

The invention relates to a medical medical auxiliary device, which is a connection switch for liquid shunting, confluence and pumping drainage in medical operation, in particular to a medical switch joint.

背景技术 Background technique

In the field of existing medical technology, in order to realize the operation of liquid confluence and pumping and drainage, the method shown in Fig. 1 is adopted, which is Y. The type connector is directly connected to the external indwelling catheter to form a multi-channel communication channel, and the Y-connector interface branch end is fixed with a needle infusion connector or a needleless infusion connector, and the infusion connector is used for connecting a medical device such as an infusion set. This kind of Y The type joint is not suitable for the application of liquid medicine, that is, one end of the liquid supply, multi-end liquid discharge; in the case of infusion, when the infusion is finished, after the heparin sodium is flushed, the puncture needle is withdrawn, which will generate negative pressure, causing the patient's blood to flow backwards. Intravascular indwelling catheter end, need to drive the reverse flow of blood in the catheter, the operation is too cumbersome, if you do not drive blood operation, Y The type joint must be connected with an expensive needle-free joint capable of generating positive liquid flow, which has a small economic burden on the patient; and in the case of intermittent infusion, the liquid injection channel cannot be shut off, and the liquid flow regulating valve is used to cut off the liquid. Flow due to external shutdown switch distance Y There is still a distance between the type joints, which will cause the infusion of the drug solution to diffuse into the truncated lumen, so that the patient is under-medicated. Therefore, in order to achieve intermittent drug delivery, the puncture needle of the infusion system needs to be pulled out to disconnect the liquid supply. When necessary, the puncture needle is re-attached, and then the liquid supply is turned on. In the case of infusion and drainage, there is the same problem as the intermittent infusion, and the above operation is also cumbersome.

发明内容 Summary of the invention

The object of the present invention is to overcome the deficiencies in the prior art, and to provide a negative pressure without a negative pressure after the infusion is withdrawn, and the medicine injection channel can be shut off, and the intermittent infusion can be performed. Convenient, suitable for medical switch joints used in medical applications.

The object of the invention is achieved by the following techniques:

The medical switch joint comprises a joint seat, an infusion joint and a liquid outlet joint, and one or two or more infusion joints are respectively connected with the joint seat, and the joint seat is connected with the human body indwelling device catheter through the liquid outlet joint, and the constituent points thereof are: infusion The joint is sealingly connected with the corresponding part of the joint seat in a manner movable relative to the joint seat, and a valve opened or closed by the movement of the infusion joint relative to the joint seat is bridged between the infusion passage of the inner core of the infusion joint and the inner core of the joint seat Between the liquid passages, the infusion passage communicates with the liquid outlet of the liquid outlet joint through the valve and the liquid passage.

In this way, the infusion connector corresponding to the switch can be arbitrarily turned off or opened through the valve, and the intermittent infusion can be performed, and the operation is convenient. Since the valve is closer to the indwelling device catheter than the heparin cap on the infusion connector, no negative pressure is generated when the puncture needle is withdrawn and the heparin sodium needle is pulled out.

This infusion connector essentially becomes the control switch for this valve.

The object of the present invention can also be achieved by the following means.

The infusion joint is pre-tensioned with the joint spring in a manner of moving up and down relative to the joint seat, and the inflating joint of the lower end of the moving stroke is locked with the joint seat, and is released by the spring to the infusion joint of the high end of the moving stroke. Free, the low end and the high end point respectively correspond to the closing and opening of the valve.

The structure of the control switch described above is actually a structure in which the single-pencil ballpoint pen presses and controls the pen core to move up and down. Specifically, in the present case, the ball-point pen end pressing head and the refill correspond to the infusion connector of the present application, and the ball-point pen cylinder is equivalent to the present invention. The joint of the application, since this configuration is a well-known technique, will not be described again here.

The infusion joint is connected to the joint seat in a manner of rotating relative to the joint seat, and the two end points of the rotation stroke respectively correspond to the closing and opening of the valve.

The axis of this rotational connection either intersects or bisects coaxially or perpendicularly to the axis of the infusion connector.

Further optimization of this construction is:

The joint seat has a cylindrical shape, and one end of the infusion joint is sleeved with the cylindrical shape, and the rotation axis of the socket is coaxial with the axis of the cylinder, but obliquely intersects with the axis of the infusion joint, and the circle of the joint seat The cylindrical inner cavity is an over-liquid chamber, and a cylindrical through-hole is penetrated through the cylindrical side wall of the socket, and the infusion port which is rotated to the open end end is connected with the through-hole.

When there are two infusion joints, the two infusion joints are respectively installed at both ends of the cylindrical joint.

The liquid outlet joint is composed of a conical male joint and a movable nut which is inserted into the outer periphery thereof. The rear end of the male joint has a convex ring card whose nut axis movement is limited, and the male joint is inserted into the conical female joint connected with the extracorporeal indwelling catheter. The movable nut and the female connector are screwed together.

Due to the snapping action of the movable nut and the ring card, the outer peripheral surface of the liquid outlet joint and the inner surface of the female joint can be closely matched, so that the liquid outlet channel communicates with the inner cavity of the female joint and the lumen of the indwelling catheter.

In summary, the present invention has the following advantages over the prior art: after the infusion is finished, the negative pressure is not generated after the puncture needle is withdrawn, and the liquid injection channel can be shut off, and the intermittent infusion can be performed, and the operation is convenient and suitable. Medical use in a variety of occasions. The three-way joint can be used in the direction of reversing, that is, the liquid outlet joint is used as the infusion joint, and the infusion joint is used as the liquid outlet joint. At this time, it can be used for the liquid medicine shunting occasion, that is, one end liquid supply, multi-end liquid discharge, which is a Unexpected effects.

附图说明： BRIEF DESCRIPTION OF THE DRAWINGS:

Fig. 1 is a schematic view showing the structure of a connector of the prior art connected to a hose of a human external indwelling device.

Fig. 2 is a structural schematic view showing the connection of the medical switch joint of the embodiment 1 of the present invention and the hose of the external human body indwelling device.

3 is a structural schematic view showing the medical switch connector of the preferred embodiment of the present invention connected to the female connector of the external human body indwelling device.

Figure 4 is a left side view of the medical switch connector of Figures 2 and 3.

FIG. 5 is a cross-sectional view showing the structure of an infusion connector in a medical switch joint according to an embodiment of the present invention.

Figure 6 is a left view of Figure 5.

FIG. 7 is a schematic diagram of an ON state of a medical switch joint according to an embodiment of the present invention.

Label description:

1 Connector seat 1.1 Flow through hole 1.2 Outlet channel 1.3 Over-fluid chamber 2 Seal ring 3 End cap 4 Infusion connector 4.1 Infusion channel 4.2 Small hole channel 4.3 Mounting hole 4.4 Rotate the sliding cavity.

The invention will now be described in greater detail with reference to the drawings.

具体实施方式 detailed description

Example 1

As shown in Figure 2, Figure 4 and Figure 5, Figure 6, the medical switch connector consists of the connector seat 1, the infusion connector 4 , the liquid outlet joint and the valve composition, the joint seat 1 is a T-shaped body formed by three cylindrical bodies, and the end portions of the upper end cylinders of the T-shaped body are symmetrically arranged with the end cover 3 and the sealing ring 2 The lateral cylindrical cavity is the liquid passage 1.3, and the vertical cylindrical body is the liquid outlet joint, and the inner cavity is the liquid outlet passage 1.2, and the liquid outlet passage 1.2 is connected with the liquid passage chamber 1.3. Connector seat 1T The outer circumference of the upper half of the glyph has a stepped shaft shape, and the liquid outlet joint body is directly fixed to the external indwelling catheter; the lower part of the infusion joint 4 has a rotary sliding cavity 4.4, the cavity and the joint seat 1 The outer ends of the stepped shafts at both ends are matched by the transition fit and the sealed joint, and can be freely rotated on the stepped shaft. The axial direction of the bore is at an angle with the axis of the infusion joint, the infusion channel is an inner conical channel, and the bottom of the channel is a small hole. Channel 4.2 It is in communication with the rotary sliding bore 4.4. The annular seal ring 2 is made of medical elastic soft material and is placed in the rotary sliding cavity 4.4. The two end faces are mounted in the cavity, and the end face of the sealing ring 2 is closely attached to the end face of the cavity. Connector seat 1 The stepped shaft at both ends passes through the inner hole of the sealing ring 2 and rotates the sliding cavity 4.4. The end of the shaft is flush with the end surface of the sealing ring 2, and the step surface is in close contact with the other end surface of the sealing ring 2. End cap 3 It is a stepped cylinder, the small end is matched with the two ends of the liquid chamber 1.3 on the joint seat 1 , the small end of the end cover passes through the sealing ring, and is inserted into the hole at both ends of the liquid chamber 1.3 to achieve tight sealing fit, and the end cover 3 The intermediate step surface tightly presses the end face of the sealing ring 2 and is fixed to the upper end faces of the upper half of the 1T word of the joint. A through hole is formed in the cylindrical side wall corresponding to the rotating sliding cavity 4.4. When rotating the infusion connector 4 to the opening end, the small hole channel 4.2 coincides with the through hole 1.1, and the two are connected, so that the infusion channel 4.1 passes through the small hole channel 4.2, the small hole through the hole 1.2 The liquid chamber 1.3 is connected to the liquid outlet channel 1.2.

The invention is so effective: when the two infusion joints are in the same plane as the joint seat axis, the infusion joint small hole passage 4.2 and the joint seat through the liquid small hole 1.1 is approximately 90 degrees offset, because the outer peripheral surface of the stepped shaft of the joint seat has a sealing fit with the surface of the rotating sliding cavity of the infusion joint, the infusion channel 4.1 and the overflow chamber 1.3 All are closed, and each channel is different from each other. When one of the infusion connector infusion operations is required, simply swing the infusion connector and make the small hole channel 4.2 and the through hole 1.1 Approximate overlap, such that the side infusion connector passes through the small hole channel 4.2, the through hole 1.1 and the overflow chamber 1.3 and the outlet channel 1 , 2 Connect, you can infuse or draw fluid. When this side channel is not required, the liquid channel can be shut off by simply swinging back the infusion connector. When one of the infusion channels is already connected and the other side of the infusion channel is needed, the other side of the infusion port can be oscillated as described above, so that the other infusion channel communicates with the outlet channel, thus realizing the liquid confluence infusion function, If necessary, any of the channels can be cut off at any time for intermittent infusion. According to medical needs, by oscillating the infusion connector, it is also easy to pump the volume of the suction chamber and infuse the drug.

The parts not described in this embodiment are the same as those in the prior art.

Best embodiment:

Figure 3 As shown, the medical switch connector can be a free-standing three-way switch because the tap connector is not fixedly linked to the hose. The liquid outlet joint is composed of a conical male joint and a movable nut which is inserted into the outer periphery thereof. The rear end of the male joint has a convex ring card, the nut axis movement is limited by the ring card, and the male joint is inserted into the cone connected with the extracorporeal indwelling catheter. The female connector, the movable nut and the female connector are screwed together, and the outer peripheral surface of the liquid outlet joint and the inner surface of the female joint can be closely matched due to the snapping action of the movable nut and the ring card, so that the liquid outlet channel and the female joint cavity and The indwelling catheter lumen is connected.

When in a group of diseases, need to inject liquid medicine, and the hand is insufficient, you can use Figure 3 The independent three-way switch connects the switches in series, which can realize unified medicine supply, and at the same time, many people take medicine, which greatly saves manpower and reduces the labor intensity of medical personnel.

The parts not described in this embodiment are the same as those in the first embodiment.

Claims

The medical switch joint comprises a joint seat, an infusion joint and a liquid outlet joint, and one or two or more infusion joints are respectively connected with the joint seat, and the joint seat is connected with the human body indwelling device catheter through the liquid outlet joint, characterized in that the infusion joint The valve can be connected to the corresponding part of the joint seat in a manner movable relative to the joint seat, and a valve opened or closed by the movement of the infusion joint relative to the joint seat is bridged between the infusion channel of the inner core of the infusion joint and the core of the joint seat. Between the liquid chambers, the infusion channel communicates with the liquid outlet of the liquid outlet connector via the valve and the fluid passage.
The medical switch connector according to claim 1, wherein the infusion connector is pre-tensioned with the connector spring in a manner of moving up and down relative to the connector seat, and the moving stroke low end infusion connector and the connector block are locked and locked, and are released by the spring. The infusion connector that is ejected to the high end of the moving stroke is pressed down relative to the joint seat, and the lower end point and the upper end point respectively correspond to the closing and opening of the valve.
The medical switch connector according to claim 1, wherein the infusion joint is connected to the joint seat in a manner of rotating relative to the joint seat, and the two end points of the rotation stroke respectively correspond to the closing and opening of the valve.
The medical switch connector of claim 3 wherein the axis of the rotational connection either intersects or bisects coaxially or perpendicularly to the axis of the infusion connector.
The medical switch joint according to claim 3 or 4, wherein the joint seat has a cylindrical shape, and one end of the infusion joint is sleeved with the cylindrical shape, and the rotation axis of the socket is cylindrical and cylindrical. The axis is coaxial, but obliquely intersects with the axis of the infusion connector, the cylindrical inner cavity of the connector seat is an over-liquid chamber, and the cylindrical side wall of the socket penetrates through the small hole through the through hole, and rotates to the infusion port of the opening end The infusion channel is just in communication with the through-hole.
The medical switch connector according to claim 5, wherein when there are two infusion joints, the two infusion joints are respectively mounted at opposite ends of the cylindrical joint.
The medical switch connector according to claim 1, wherein the liquid outlet joint is composed of a conical male joint and a movable nut that is fitted into the outer periphery thereof, and the rear end of the male joint has a projection in which the nut axis movement is limited. The ring card and the male connector are inserted into the conical female connector connected with the external indwelling catheter, and the movable nut and the female connector are screwed.