JP2003093505A - Infusion appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an infusion tube device capable of preventing the contamina tion of clothing or bedding with blood or an infusion during disconnection of an infusion tube even if pulling force is applied to the connection part of the infusion tube when a patient moves his arm or turns in sleep. SOLUTION: An L-shaped locking groove, which comprises an axial longitudinal groove part opened at the end part of the locking groove and the lateral groove part circumferentially formed from the deep part of the longitudinal groove part, is provided to the connector of an extension tube and the locking projection locked with the L-shaped locking groove is provided to the outer periphery of the connector insertion part of a main tube. After the connector insertion part is inserted axially in the connector in such a state that the locking projection is aligned with the longitudinal groove part of the locking groove, it is revolved circumferentially to lock the locking projection with the lateral groove part to connect the tubes to constitute the infusion appliance preventing the disconnection of the tubes even if pulling force acts on the connection part.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion device used for infusing blood, nutrients, drugs and the like into a body by infusion. 2. Description of the Related Art A conventional infusion device has a drip tube having a needle which can pierce a rubber stopper of an infusion solution container at one end, and a tapered cylindrical connector insertion portion at the other end. A main tube, an extension tube having a connector to which a connector insertion portion of the main tube is inserted and connected at one end, and an extension tube having a needle attachment portion for attaching a venous needle to the other end, the downstream side of the drip tube; The flow rate of an infusion agent flowing inside is controlled by a flow rate control valve attached to the main tube. [0003] However, in such a configuration, the main tube and the extension tube are connected by inserting a connector insertion portion into a connector, and in this state, the needle of the main tube is connected. When piercing the rubber stopper of the infusion solution container, puncturing the venous needle attached to the needle attachment part of the extension tube into the venous blood vessel such as the arm, and performing infusion by fixing the venous needle with tape or the like, If the patient moves his arm or turns over and pulls on the main tube and the extension tube, the connector insertion part will come off from the connector and blood will flow out of the blood vessel through the extension tube, There was a drawback that the infusion solution leaked out of the main tube and soiled clothing and bedding. In addition, in order to prevent the above-mentioned drawbacks, since the connector insertion part is inserted in the connector in advance and the part is wound around with a tape so as not to come off, there is a drawback that it is troublesome. . The present invention has been made in view of the above-mentioned drawbacks, and
The connection between the main tube and the extension tube can be easily performed, and even if the patient moves his arm or turns over and a pulling force is applied to the connection, the connection can be reliably prevented from being disconnected. It aims to provide an infusion device. To achieve the above object, the present invention provides a drip tube having a needle at one end having a needle penetrating an infusion container, and a tapered cylindrical connector at the other end. A main tube having an insertion portion, an extension tube having a connector to which a connector insertion portion of the main tube is inserted and connected at one end, and a needle mounting portion for mounting a venous needle at the other end; An infusion device comprising: a flow control valve for adjusting the flow rate of an infusion flowing through the inside attached to the downstream main tube; An L-shaped engaging groove formed of a lateral groove formed in a circumferential direction from a back portion of the main tube, and engaging with the L-shaped engaging groove on an outer peripheral portion of a connector insertion portion of the main tube. After inserting the connector insertion portion into the connector in the axial direction with the engagement projection and the vertical groove portion of the engagement groove aligned with each other, the connector insertion portion is rotated in the circumferential direction to engage. The infusion device is configured so that the projection is engaged with the lateral groove and connected, and the connection is not released even when a pulling force is applied. Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. In the first embodiment of the present invention shown in FIGS. 1 to 3, reference numeral 1 denotes a main tube, and the main tube 1 has a needle 3 inserted at one end into a rubber stopper 2a of an infusion solution container 2.
A transfusion tube 4 made of a transparent synthetic resin, which is visible from the needle 3 and having a drip in which the infusion flowing from the needle 3 is dropped, is attached to the other end via a rubber connection tube 5. Is attached. The air reservoir 6 has an air reservoir 7 protruding laterally at a central portion, and a tapered tubular connector insertion portion 8 integrally formed at a tip portion. In the present embodiment, one engagement protrusion 9 is formed on the outer peripheral portion of the connector insertion portion 8. Reference numeral 10 denotes an extension tube. The extension tube 10 has a connector 12 having an insertion hole 11 at one end, into which a connector insertion portion 8 formed at the tip of the air reservoir tube 6 is connected to be connected to the main tube 1. And a needle mounting member 14 having a needle mounting portion 14a for mounting the venous needle 13 at the other end.
Reference numeral 15 designates the connector insertion portion 8 as the connector 12
An engagement groove formed in the outer periphery of the connector 12 so as to be able to engage with the engagement projection 9 when the connector 12 is inserted and connected. The overall shape of the vertical groove portion 15a in the L-shape is formed by a vertical groove portion 15a in the core direction and a horizontal groove portion 15c formed so that the side on the end side in the circumferential direction from the deep end of the vertical groove portion 15a becomes an inclined surface 15b. In the embodiment, one is formed. In addition, this engagement groove 1
5 may be provided at equal positions, such as two or three, and an engagement protrusion 9 may be provided on the outer peripheral portion of the connector insertion portion 8.
May be provided in the same number as the engagement grooves 15. Reference numeral 16 denotes a flow control valve mounted on the main tube 1 on the downstream side of the drip tube 4 so as to be movable. The existing flow control valve 16 opens and closes a passage by pressing the main tube 1. It is used. When the infusion device 17 having the above structure is used, first, the main tube 1 and the extension tube 10 are connected by inserting the connector insertion portion 8 at the tip of the air reservoir 6 into the insertion hole 11 of the connector 12. I do. That is, in this connection, the connector insertion portion 8 is inserted in the support core direction with the engagement projection 9 and the vertical groove portion 15a of the engagement groove 15 being aligned with the connector 12, and when the connector insertion portion 8 abuts, it is rotated in the circumferential direction as it is. Then, the engagement projection 9 engages with the side of the lateral groove 15c and comes into contact with the inclined surface 15b of the side of the lateral groove 15c.
In this state, when a force is applied so as to further rotate, the connection is completed in a state where the engagement protrusion 9 is pressed along the inclined surface 15b. When this connection is completed, the vein needle 13 is mounted on the needle mounting portion 14a of the needle mounting member 14. Next, the needle 3 attached to the drip tube 2 is attached to the stand S in the same manner as before.
Penetrates the rubber stopper 2a of the infusion solution container 2 suspended in
After the infusion solution is guided to the tip of the venous needle 13 in a state where about half of the infusion tube 2 is stored, the flow control valve 16 is closed. Thereafter, the preparation is completed when the venous needle 13 is punctured into a venous blood vessel such as a patient's arm and the venous needle 13 is fixed with the tape T. In this state, the flow is adjusted by gradually loosening the flow control valve 16 and adjusting the speed while observing the infusion of the infusion agent flowing from the needle 3 into the infusion tube 2. [0009] In the case where the main tube 1 and the extension tube 10 are connected as described above, even when a patient moves his arm or turns over and a pulling force is applied during infusion, the connector 12 and the extension tube 10 are connected. Looseness or disconnection of the connection with the connector insertion portion 8 can be reliably prevented. Next, different embodiments of the present invention shown in FIGS. 4 to 10 will be described. In addition,
In the description of these different embodiments, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and redundant description will be omitted. In the second embodiment of the present invention shown in FIGS. 4 to 6, the main difference from the first embodiment of the present invention is that the engagement groove 15A is connected to the connector 12 of the lateral groove 15c.
In the infusion device 17A having the engagement groove 15A formed as described above, the patient may move his arm or turn over even if the connector 12 is formed without providing an inclined surface on the side of the end of the infusion device. Even if a pulling force is applied, the connector 12
The connection between the connector and the connector insertion portion 8 can be prevented from coming off. The third embodiment of the present invention shown in FIGS. 7 to 10 is mainly different from the first embodiment of the present invention in that an engaging groove 15B is formed on the inner wall of the connector 12 on the outer peripheral surface. The infusion device 17B in which the engagement groove 15B is formed in the point that it is formed so as not to penetrate can provide strength so that the portion of the connector 12 where the engagement groove 15B is formed does not bend. . As is apparent from the above description, the following effects can be obtained in the present invention. (1) The connector of the extension tube is provided with an L-shaped engagement groove which is open at the end, and an engagement projection which engages with the L-shaped engagement groove is provided on the outer periphery of the connector insertion portion of the main tube. Since the connector is provided and configured, the connector can be connected to the lateral groove by simply rotating in the circumferential direction after inserting the connector insertion portion into the connector with the engagement protrusion along the engagement groove. Therefore, the connection operation is easy, and even when a pulling force acts on the connection portion, the connector insertion portion can be reliably prevented from being detached from the connector. (2) According to the above (1), it is possible to reliably prevent the connector insertion portion from coming off from the connector and coming off. Can be prevented. In addition, it is possible to save the trouble of winding and fixing the connection portion with a tape or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of a use state showing a first embodiment of the present invention. FIG. 2 is an explanatory diagram of a separated state showing the first embodiment of the present invention. FIG. 3 is an enlarged perspective view of a connector insertion portion of an air reservoir and a connector. FIG. 4 is an explanatory diagram of a state of use showing a second embodiment of the present invention. FIG. 5 is an explanatory diagram of a separated state showing a second embodiment of the present invention. FIG. 6 is an enlarged perspective view of a connector insertion portion of the air reservoir and a connector. FIG. 7 is an explanatory diagram of a state of use showing a third embodiment of the present invention. FIG. 8 is an explanatory view of a separated state showing a third embodiment of the present invention. FIG. 9 is an enlarged perspective view of a connector insertion portion of the air reservoir and a connector. [Description of Signs] 1: Main tube, 2: Infusion agent container, 3: Needle, 4: Drip tube, 5: Connection tube, 6: Air reservoir, 7: Air reservoir, 8: Connector insertion portion, 9: Engagement projection,
10: extension tube, 11: insertion hole,
12: connector, 13: venous needle,
14: Needle mounting member, 14a: Needle mounting portion, 15, 15A, 15B: Engagement groove, 15a: Vertical groove portion, 15
b: inclined surface, 15c: lateral groove,
16: Flow control valve, 17, 17A, 17B: Infusion device
S: stand, T: tape.

Claims (1)

Claims: 1. A main tube having a drip tube having a needle at one end having a needle penetrating into an infusion solution container, and having a tapered cylindrical connector insertion portion at the other end, and a connector of the main tube. An extension tube having a connector to which an insertion portion is inserted and connected at one end, and an extension tube having a needle attachment portion for attaching a venous needle to the other end, and an infusion flowing through an interior attached to a main tube downstream of the drip tube. In the infusion device comprising a flow rate adjusting valve for adjusting the flow rate, the connector of the extension tube has a longitudinal groove portion in the axial direction opening to the end portion, and a lateral groove portion formed in a circumferential direction from a depth portion of the longitudinal groove portion. L
The main tube is provided with an engagement protrusion which engages with the L-shaped engagement groove on an outer peripheral portion of the connector insertion portion. After inserting in the axial direction with the longitudinal grooves of the engaging grooves aligned with the longitudinal grooves, then rotating in the circumferential direction to engage the engaging protrusions with the lateral grooves and connect them, and a pulling force is applied. An infusion device characterized in that the connection is not disconnected.