JP2010142438A - Liquid mixed injection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid mixed injection device which can improve the retention of the injection implement while the retention of a liquid and air on the inside can be prevented without growing in size. <P>SOLUTION: The liquid mixed injection device A is formed of a chamber section 11, a main upstream tube 12, a downstream tube, and an accessory upstream tube 14 which are connected to the chamber section 11 respectively, an injection section 20 which is attached to an opening of the accessory upstream tube 14, and a cock 30 which is provided in the chamber section 11. Additionally, medicinal solution can be injected into the accessory upstream tube 14 from a syringe by inserting a male lure section of the syringe into a slit 20a of the injection section 20. Moreover, after the medicinal solution proceeds to the accessory upstream tube 14 side from the direction that proceeds to the chamber section 11 from the main upstream tube, a partitioning wall 17 which regulates the medical solution so that it proceeds to the downstream tube from the chamber section 11 is formed around a moving domain where the male lure section in the accessory upstream tube 14 proceeds and recedes. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid co-infusion device that is connected to a plurality of infusion tubes or the like used for medical treatment and allows a liquid such as a drug solution to flow between the infusion tubes.

  Conventionally, a predetermined medicinal solution, nutrient, physiological saline, and the like have been supplied into a patient's body using a plurality of infusion tubes. In such a case, a liquid co-infusion device such as a medical stopcock is used. The infusion tubes are used to communicate or block each other (for example, see Patent Document 1). The flow path switching device (liquid co-injection device) includes a first branch portion, a second branch portion, and a third branch portion that are erected from the outer periphery of the cylindrical shaft portion holding portion, and from the hollow chamber in the shaft portion holding portion. The apparatus main body is constituted by branching out three branch paths. And, in the hollow chamber of the apparatus main body, a sliding body having a cylindrical shaft portion provided with the first flow path and the second flow path is rotatably provided, and by rotating the sliding body, Three branch paths can be switched.

  In addition, the holding portion that holds the sliding body is provided with a through hole corresponding to the first and second flow paths in the region where the third branch path is provided. For this reason, the infusion solution passes through one through hole from the first flow path and enters the region where the third branch path is provided, and then passes through the other through hole to pass through the second flow path. Flowing into. In addition, a diaphragm provided with a slit is attached to the third branch passage, and the tip of the lure is passed through the slit to mix other chemicals from the lure into the region where the third branch passage is provided. be able to.

In addition, a liquid co-infusion device has also been developed in which a branch pipe is formed in the middle part of the housing in which both ends of the co-infusion port and outlet are formed, and a cylindrical hollow body is integrally provided in the inner cavity of the housing. (For example, refer to Patent Document 2). In this liquid co-infusion tool, it is provided with a connection part having a blunt needle that is slidably and rotatably fitted to the connection part (mixed injection port side) of the housing, and when this connection tool is attached to the connection part of the housing, A gap is formed between the tip of the blunt needle and the tip of the cylindrical hollow body. For this reason, a chemical | medical solution can be inject | poured into the infusion solution which flows into an outflow port through the lumen | bore of a housing from a branch pipe.
Japanese Patent No. 3719443 JP-A-11-33124

  However, in the conventional flow path switching device according to Patent Document 1 described above, the two through holes are provided in the wall portion provided to close the branch pipe in which the third branch path is formed. In order to prevent the tip of the lure from coming into contact with the wall, it is necessary to increase the length between the diaphragm and the through hole. As a result, the space of the third branch passage becomes larger, and the liquid tends to stay or the apparatus becomes larger. Moreover, since the conventional liquid co-infusion device according to Patent Document 2 described above can be applied only to a connector having a constant-shaped blunt needle, a structure suitable for luer connection is desired.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a liquid co-infusion device capable of preventing liquid and air from staying inside without increasing the size and improving the holding power of the injection device. Is to provide.

  In order to achieve the above-mentioned object, the structural features of the liquid co-infusion device according to the present invention include a chamber part, a main upstream pipe, a downstream pipe, and a secondary upstream pipe connected to the chamber part, respectively, and a secondary upstream pipe The liquid infusion device is provided with an elastic injection part provided with a slit that can be opened and closed in accordance with the insertion / removal of the injection tool, and the liquid flowing in from the main upstream pipe is sub-upstream from the direction toward the chamber part. After moving to the tube side, a partition wall is formed around the moving area where the tip of the injection tool in the auxiliary upstream tube or the chamber portion moves forward and backward, so as to advance from the chamber portion to the downstream tube. This is because the tip of the injection tool is prevented from contacting.

  In the liquid co-infusion device according to the present invention, a predetermined liquid can flow from the main upstream pipe to the downstream pipe through the chamber part, and another liquid can flow from the auxiliary upstream pipe to the downstream pipe through the chamber part. it can. The liquid flowing from the main upstream pipe to the downstream pipe through the chamber portion does not flow in a straight line, but by providing a partition in the sub upstream pipe or the chamber portion, the inside of the chamber portion temporarily moves to the sub upstream pipe side. After flowing, it flows from the sub upstream pipe side to the downstream pipe through the chamber portion. For this reason, for example, when the liquid co-infusion device is arranged so that the sub upstream pipe side is on the upper side, the liquid flowing from the main upstream pipe to the downstream pipe through the chamber part enters the chamber part from the main upstream pipe. Once flowing upward and over the partition wall, it flows from the chamber part to the downstream pipe.

  As a result, the liquid flows through the upper side of the space in the sub upstream pipe, and air does not stay in the sub upstream pipe or the chamber part, and does not flow along the liquid flow path. In addition, no liquid stays inside the sub-upstream pipe or the chamber. Thereby, it is not necessary to perform a troublesome operation to remove the accumulated air, and it is possible to suppress the generation of bacteria in the sub upstream pipe and the chamber part. In addition, the partition wall is formed around the moving region where the tip of the injection tool in the auxiliary upstream pipe and the chamber part advances and retreats, that is, the partition wall is separated from the tip of the injection tool located in the movement region. Therefore, when injecting another liquid from the injection device into the sub-upstream tube or the chamber, the tip of the injection device will contact the partition even if the injection device is inserted deeply into the slit of the elastic injection portion. There is no contact.

  For this reason, it is not necessary to increase the size of the chamber part and the sub-upstream pipe in order to provide the partition wall. In addition, the force with which the elastic injection part holds the injection tool can be improved. In this case, the other liquid may be mixed with a predetermined liquid supplied from the main upstream pipe inside the secondary upstream pipe or the chamber part, or only the other liquid may be mixed downstream via the secondary upstream pipe or the chamber part. It may flow into a tube. The other liquid may be the same type of liquid as that supplied from the main upstream pipe in the sense that the liquid is not supplied from the main upstream pipe side. Moreover, as an elastic injection | pouring part, it can comprise with the stopper made from rubber provided with the slit, for example. According to this, when the supply of the other liquid is finished and the injection tool is removed from the elastic injection portion, the elastic injection portion returns to the original shape in which the slit is closed by the restoring force, so that the secondary upstream pipe is closed.

  In addition, when using a member made of a material other than rubber as the elastic injecting portion, one that can open and close the slit by the same action as rubber is used. Furthermore, it is preferable to provide a partition so as to divide the chamber portion into a wide space portion and a narrow space portion, arrange the wide space on the upstream side, and arrange the narrow space on the downstream side. According to this, since the liquid flowing in the chamber portion fills the wider space and flows to the narrower space beyond the partition wall, it is possible to more reliably prevent air and liquid from staying in the chamber portion.

  In addition, another structural feature of the liquid co-infusion device according to the present invention is that the partition wall is configured by a wall portion in which at least the edge of the moving region side of the partition surface perpendicular to the moving region is formed in a concave curved shape. It is in. According to this, the partition wall is positioned so as to be along the outer peripheral surface of the injection tool on one side of the distal end portion of the injection tool located inside the auxiliary upstream pipe or the chamber part through the slit of the elastic injection part. become. For this reason, the front-end | tip part of the injection tool which penetrates the slit of an elastic injection | pouring part, and a partition can be made to approach, and, thereby, the dead space of a sub upstream pipe or a chamber part can be minimized. The dead space in this case refers to a space where liquid or air is likely to stay.

  In addition, another structural feature of the liquid co-infusion device according to the present invention is that when the injection device is inserted into the slit for a predetermined length, the inner surface of the slit is deformed to move the injection device in the direction of travel. It is composed of a substantially plate-shaped valve body that cannot be restored to its original state by pushing it back, and when the injection tool is inserted into the slit at least a predetermined length around the tip of the injection tool. This is because the partition walls are located.

  The state in which the inner surface of the slit, i.e., the opposite cut surface, is deformed and cannot be restored to the original state by turning the injection tool in the direction of travel, is that the curvature of the elastic injection portion in the vicinity of the slit is In this state, the restoring force is greater in the direction of tightening the injection tool than in the direction of pushing back the injection tool. In this case, the injection tool inserted into the slit of the elastic injection part is held in a stable state, and in this state, another liquid is injected from the injection tool into the sub upstream pipe or the chamber part. Therefore, by placing the partition wall around the tip of the injection tool at this time, it is possible to provide a portion that overlaps the height direction of the partition wall and the axial direction of the injection tool. There is no wasted space in the tube. In addition, let predetermined length in this invention be insertion length when the outer peripheral surface front-end | tip part of an injection tool passes the corner | angular part of the outer surface of an elastic injection | pouring part, and the inner surface of a slit.

  Further, another structural feature of the liquid co-infusion device according to the present invention is that the thickness of the partition wall approaches the distal end portion located on the opening side of the secondary upstream pipe from the proximal end portion located on the chamber portion side. It is to make it thinner. In this case, for example, it is preferable to make the front end side of the partition wall thinner by making the outer surface of the partition wall parallel to a moving region where the injection tool advances and retreats and tilting the inner surface of the partition wall with respect to the outer surface. According to this, the part facing the injection tool can be made thin while maintaining the strength of the partition wall. In addition, since the portion where the right-angled corner is formed on the lower side of the partition wall can be reduced, the portion where air or liquid is likely to stay can be further reduced.

  Further, another structural feature of the liquid co-infusion device according to the present invention is that a liquid channel is formed between the chamber portion and the chamber portion and the main upstream pipe by rotating in a predetermined direction. The present invention resides in that a cock capable of communicating or blocking between the chamber portion and the downstream pipe and between the chamber portion and the sub upstream pipe is provided in the chamber portion. According to this, the communication state between the branch pipes provided in the liquid co-infusion device can be arbitrarily switched.

(First embodiment)
Hereinafter, a liquid co-infusion device according to a first embodiment of the present invention will be described in detail with reference to the drawings. 1 to 6 show a liquid co-infusion device A according to the embodiment, and this liquid co-infusion device A is attached to the co-infusion device body 10 via the co-infusion device body 10 and the cap portion 21 in the present invention. It comprises an injection part 20 and a cock 30 as such an elastic injection part. The co-injector main body 10 has a substantially cylindrical chamber portion 11 arranged with the axial direction facing forward and backward (hereinafter, FIG. 3 is the front, and the vertical and horizontal directions will be described with reference to FIG. 3). The main upstream pipe 12 and the downstream pipe 13 extending substantially along the same axis while maintaining an angle of 180 degrees on both the left and right sides of the chamber section 11, and the chamber section 11 orthogonal to the main upstream pipe 12 and the downstream pipe 13. And an auxiliary upstream pipe 14 provided at the upper part of the pipe.

  Three communication holes 12a and 14a (see FIG. 7) and the like (the remaining one communication hole is not shown) are formed at a substantially central position in the axial direction of the chamber portion 11 at intervals of 90 degrees along the circumference. The insides of the main upstream pipe 12, the sub upstream pipe 14, and the downstream pipe 13 communicate with these communication holes 12a and 14a, respectively. The diameter of the communication hole 14a that connects the sub upstream pipe 14 and the chamber portion 11 is set to be larger than the diameter of the other communication holes 12a and the like. Further, as shown in FIG. 7, both the left and right sides (in FIG. 7) of the inner peripheral surface of the portion extending from the communication hole 14a communicating the chamber portion 11 and the sub upstream pipe 14 to the approximate center in the axial direction of the sub upstream pipe 14 A thick partition wall 16 that divides the flow path from the main upstream pipe 12 to the downstream pipe 13 back and forth is formed in a portion from the front side to the back side of the paper.

  The partition wall 16 is provided at the lower side portion of the sub upstream pipe 14, and is provided at the left and right portions of the inner peripheral surface in a state of being spaced from the front and rear portions of the inner peripheral surface of the sub upstream pipe 14. It is connected. A central portion in the width direction on the front surface of the partition wall 16 is formed as an arcuate vertical curved surface projecting forward, and a central portion in the width direction on the rear surface of the partition wall 16 is formed in a planar vertical surface. Yes. A partition wall 17 extending upward is formed at the front portion of the upper surface of the partition wall 16. The partition wall 17 is formed along the front edge portion on the upper surface of the partition wall 16, and the left and right portions are formed in a straight line extending left and right in the plan view shown in FIG. 8, and the center portion projects forward. It is formed in an arc shape.

  For this reason, the liquid flowing from the main upstream pipe 12 to the downstream pipe 13 flows from the inside of the main upstream pipe 12 to the rear side of the chamber portion 11 through the communication hole 12a, and then the rear side of the sub upstream pipe 14 is divided into a partition wall. 16 flows upward along the rear surface. Further, the liquid rises along the rear surface of the partition wall 17 on the upper surface of the partition wall 16. Then, the liquid flows through the upper surface of the partition wall 17 to the lower side along the front surface of the partition wall 16 through the front side of the sub upstream pipe 14, and then flows into the chamber portion 11. It flows into the downstream pipe 13 through a communication hole not shown.

  That is, the part from the lower surface to the rear surface, the upper surface, and the rear surface of the partition wall 17 of the partition wall 16 constitutes one surface of the flow path extending from the communication hole 12a through the chamber portion 11 to the sub-upstream pipe 14, and A portion from the front surface to the front surface of the partition wall 16 constitutes one surface of a flow path extending from the sub upstream pipe 14 through the chamber portion 11 to a communication hole (not shown). Further, the main upstream pipe 12 is formed integrally with the chamber portion 11, and the opening side portion of the main upstream pipe 12 is constituted by a female connector portion 12 b in which a connecting thread portion is formed on the outer peripheral surface. Yes.

  The downstream pipe 13 is formed integrally with the chamber part 11, and is composed of a base end part 13a on the chamber part 11 side and a male luer part 13b on the front end side that is formed narrower than the base end part 13a. Yes. Further, the male luer portion 13b is formed in a tapered shape in which the distal end side portion is thinner than the proximal end portion 13a side portion. The sub upstream pipe 14 is configured by a cylindrical portion provided on the upper portion of the chamber portion 11, and engagement protrusions 14 b and 14 c are formed on the left and right of the upper end side portion on the outer peripheral surface. And the cap part 21 for fixing the rubber injection | pouring part 20 with the sub upstream pipe 14 is attached to the upper end outer peripheral surface of this sub upstream pipe 14 via engagement protrusion 14b, 14c.

  The injection part 20 is made of a disc-like elastic member having elasticity such as natural rubber, synthetic rubber, or elastomer, and a slit 20a penetrating vertically is provided at the central part thereof. The slit 20 a is formed in a straight line passing through the center point of the injection part 20, and is formed in a portion excluding the outer peripheral part of the injection part 20. The cap portion 21 has a shape in which frame-shaped engaged portions 22a and 22b are formed on the left and right sides of the lower edge portion of the shallow circular cap-shaped main body 21b in which a mixed injection port 21a including a circular hole portion is formed at the center. The engaged parts 22a and 22b are detachably attached to the auxiliary upstream pipe 14 by engaging the engaged portions 22a and 22b with the engaging protrusions 14b and 14c of the auxiliary upstream pipe 14, respectively.

  Then, the injection part 20 is attached to the inside (lower surface side) of the cap part 21, and the cap part 21 in that state is put on the upper end surface of the sub upstream pipe 14, and the engaged parts 22a and 22b of the cap part 21 are sub upstream. By engaging with the engaging protrusions 14 b and 14 c of the pipe 14, the injection part 20 is fixed to the upper end opening of the sub upstream pipe 14 via the cap part 21. The slit 20a of the injection part 20 fixed to the upper end opening of the sub upstream pipe 14 is configured so that a liquid such as a chemical liquid (hereinafter referred to as a chemical liquid) is not injected from the sub upstream pipe 14 into the chamber part 11 side. It becomes a state closed by elasticity.

  Moreover, when inject | pouring a chemical | medical solution from a sub upstream pipe, the chemical | medical solution of syringe 25 is inserted by inserting the male luer part 25a (refer FIG. 9) of the syringe 25 as an injection tool which concerns on this invention into the slit 20a of the injection | pouring part 20, for example. The accommodating part 25b and the sub upstream pipe 14 can be connected. At that time, the male luer part 25 a and the injection part 20 are brought into a close contact state due to the elasticity of the injection part 20. In this case, as shown in FIG. 10, the injection portion 20 is deformed so that the inner surface (both cut surfaces) of the slit 20a faces downward. At this time, the lower end portion of the male luer portion 25a is the edge of the slit 20a. If it is located below the part, the injection part 20 cannot push back the male luer part 25a, and the syringe 25 maintains that state.

  The rear opening of the chamber portion 11 is closed with a lid member 15 as shown in FIG. The lid member 15 is a flange-shaped locking portion that protrudes to the outside at the peripheral edge of the rear opening of the stepped cylindrical body 15a whose front end face is closed and whose rear side is slightly larger in diameter than the front side. It is formed in a shape provided with 15b. The outer diameter of the locking portion 15 b is substantially equal to the outer diameter of the chamber portion 11, and the outer diameter of the large diameter portion of the stepped cylindrical body 15 a is slightly smaller than the inner diameter of the chamber portion 11. The outer diameter of the small-diameter portion of the stepped cylindrical body 15a is slightly smaller than the outer diameter of the large-diameter portion, and the cock 30 is between the outer peripheral surface of the stepped cylindrical body 15a and the inner peripheral surface of the chamber portion 11. The rear end portion is slidably inserted.

  As shown in FIG. 11, the cock 30 includes a substantially cylindrical cock main body 31 and an operation unit 32 connected to the front end of the cock main body 31. And the cock main body 31 is installed in the chamber part 11 in the state which inserted the front-end | tip part (rear end part) between the inner peripheral surface of the chamber part 11 and the outer peripheral surface of the stepped cylindrical body 15a of the cover member 15. By rotating the operation unit 32, the operation unit 32 rotates around the axis of the chamber unit 11. Further, on the outer peripheral surface of the cock body 31, two groove portions 33 and 34 are formed side by side in the axial direction. The groove portion 33 is formed of a concave portion extending substantially half a circumference along the circumference at a portion slightly rearward from the axial center on the outer peripheral surface of the cock main body 31.

  The groove 34 has a circumferential groove 34a that extends along the outer circumferential surface of the cock body 31 in parallel with the groove 33 at a portion slightly ahead of the axial center on the outer circumferential surface of the cock main body 31, and a circumferential groove 34a. It is comprised from the substantially L-shaped recessed part which consists of the axial direction groove part 34b bent from one edge part of this, and extended toward the rear part side of an axial direction. The axial groove 34 b of the groove 34 is provided at a position spaced apart from one end of the groove 33, and the other end of the circumferential groove 34 a of the groove 34 is the other end of the groove 33. It is located in the one side (front side in FIG. 11) along the circumferential direction.

  The lengths of the groove portion 33 and the groove portion 34 along the circumferential direction of the cock main body 31 are set to be approximately equal to the half circumference of the circumference, and the distance between the groove portion 33 and the circumferential groove portion 34a of the groove portion 34 and the groove portion 33 The distance between the groove 34 and the axial groove 34b is set substantially equal. A dam 35 along the outer peripheral surface of the cock body 31 is formed between the groove 33 and the circumferential groove 34 a of the groove 34. The cock main body 31 installed in the chamber portion 11 includes a portion of the outer peripheral surface where the groove portion 33 and the axial groove portion 34b of the groove portion 34 are formed, a communication hole 12a between the chamber portion 11 and the main upstream pipe 12, and a chamber. In accordance with the position of the communication hole between the portion 11 and the downstream pipe 13, the circumferential groove 34 a of the groove 34 is closed to face the front side portion of the inner peripheral surface of the chamber portion 11.

  Further, the portion where the dam portion 35 is formed on the outer peripheral surface of the cock body 31 is in a state of being in contact with the lower surface front end side portion of the partition wall 16 on the inner peripheral surface of the chamber portion 11. For this reason, as shown in FIG. 7, when the cock main body 31 is rotated so that the weir part 35 faces upward, the groove part 33 faces the inside of the main upstream pipe 12 (located on the rear side in FIG. 7). The chamber portion 11 and the main upstream pipe 12 communicate with each other through the groove portion 33. Further, the rear portion side (not shown, but located on the front side of the groove portion 33 in FIG. 7) of the axial groove portion 34b in the groove portion 34 is opposed to the inside of the downstream tube 13 and the chamber portion 11 and the downstream tube 13 Communicate with each other via the groove 34.

  In this case, the partition wall 16 is located above the dam portion 35, and the upper surface of the dam portion 35 and the lower surface of the partition wall 16 are in contact with each other in a substantially tight contact state. Since the space in the secondary upstream pipe 14 is located above the partition wall 16, the groove 33 and the groove 34 communicate with each other through the interior of the secondary upstream pipe 14. Therefore, in this state, the chemical solution can flow from the main upstream pipe 12 to the downstream pipe 13 via the chamber portion 11 and the sub upstream pipe 14. In this case, as shown by an arrow a in FIG. 11, the chemical solution flowing from the main upstream pipe 12 into the groove portion 33 passes through the upper partition wall 16 and the partition wall 17 (located in the upper part of the arrow a). Get over and flow into the groove 34.

  At this time, since the partition wall 17 formed on the upper surface of the partition wall 16 extends to the upper side in the sub upstream pipe 14, the chemical solution passes through the upper space in the sub upstream pipe 14 and has a wide space on the rear side. It is possible to detour and pass through a narrow part of the space on the front side from the inside, and it is possible to suppress a part of the air and the chemical liquid from staying inside the chamber part 11 and the sub upstream pipe 14. From this state, the cock 30 is rotated in one direction so that the groove 33 faces the inside of the downstream pipe 13 and when the outer peripheral surface of the cock body 31 faces the inside of the main upstream pipe 12, the inside of the chamber 11 and the downstream pipe 13. Are communicated with each other, and the interior of the chamber 11 and the main upstream pipe 12 are blocked.

  Further, from the state of FIG. 7, the cock 30 is rotated to the other side so that one end side portion of the groove portion 33 is kept in communication with the inside of the main upstream pipe 12, and the outer peripheral surface of the cock body 31 is When facing the inside of the downstream pipe 13, the inside of the chamber portion 11 and the downstream pipe 13 are blocked, and the inside of the chamber portion 11 and the main upstream pipe 12 communicate with each other. Thus, by rotating the cock 30, both the main upstream pipe 12 and the downstream pipe 13 can be communicated with the chamber portion 11, or only one can be communicated with the chamber portion 11.

  The operation unit 32 includes three operation pieces 32a, 32b, and 32c. The operation pieces 32a, 32b, and 32c correspond to the main upstream pipe 12, the sub upstream pipe 14, and the downstream pipe 13, respectively. Further, it is formed with an angle of 90 degrees. That is, as shown in FIG. 3, when the operation piece 32 a is in the position indicating the main upstream pipe 12, the operation piece 32 b is in the sub upstream pipe 14, and the operation piece 32 c is in the position indicating the downstream pipe 13, All of the pipe 14 and the downstream pipe 13 are in communication with each other via the chamber portion 11.

  Further, from the state shown in FIG. 3, when the operation portion 32 is rotated 90 degrees clockwise, the operation piece 32 b points to the main upstream pipe 12 and the operation piece 32 c points to the sub upstream pipe 14. The upstream pipe 12 and the sub upstream pipe 14 communicate with each other, and the sub upstream pipe 14 and the downstream pipe 13 are blocked from each other. Further, from the state of FIG. 3, when the operation portion 32 is rotated 90 degrees counterclockwise, and the operation piece 32 a reaches the sub upstream pipe 14 and the operation piece 32 b points to the downstream pipe 13, The upstream pipe 14 and the downstream pipe 13 communicate with each other, and the main upstream pipe 12 and the sub upstream pipe 14 are blocked.

  Further, as described above, the syringe 25 can be detachably attached to the auxiliary upstream pipe 14 via the injection part 20. The syringe 25 includes a chemical solution storage portion 25b for storing a chemical solution and a thin cylindrical male luer portion 25a. By inserting the male luer portion 25a into the slit 20a of the injection portion 20, the chemical solution storage portion 25b. And the auxiliary upstream pipe 14 can be communicated with each other. When this male luer part 25a is inserted into the slit 20a of the injection part 20, the male luer part 25a expands the slit 20a while moving the injection part 20 against the inner side of the auxiliary upstream pipe 14. Go.

  As a result, the vicinity of the slit 20a of the injection part 20 is pressed against the inner side of the auxiliary upstream pipe 14 by the pressing force of the male luer part 25a, and descends in a state of being in close contact with the male luer part 25a. When the male luer portion 25a is inserted into the slit 20a for a predetermined length and is in an appropriate state, the lower end portion of the injection portion 20 is in a state of approaching the partition wall 17, as shown in FIG. In this state, the force that the injection part 20 tries to push back the male luer part 25a is weakened, and the male luer part 25a maintains that state. Further, the inner peripheral surface of the auxiliary upstream pipe 14 and the injection part 20 and the male luer part 25a and the peripheral part of the slit 20a are brought into close contact with each other due to the elasticity of the injection part 20.

  And the front-end | tip part of the male luer part 25a will be in the state which approached the partition 17 on the inner surface side of the partition 17. FIG. For this reason, the main upstream pipe 12 and the downstream pipe 13 are connected to each other, and the chemical liquid is allowed to flow from the main upstream pipe 12 side toward the downstream pipe 13 side, while another chemical liquid injected from the syringe 25 is mixed with the chemical liquid. Can do. Further, another chemical solution can be allowed to flow from the syringe 25 to the downstream pipe 13 in a state where the inside of the chamber portion 11 and the main upstream pipe 12 are blocked.

  In this configuration, when supplying two types of drug solutions into the body of a patient (not shown), first, an infusion tube (not shown) in which an indwelling needle for puncturing and placing the patient in the downstream tube 13 is connected. N) Connect the rear end. Next, a male luer portion provided at the distal end portion of an infusion tube extending from a container or the like for storing one chemical solution to be supplied to the patient is connected to the main upstream pipe 12. Next, the male luer part 25a is passed through the slit 20a of the injection part 20 in a state where the other chemical liquid is sucked into the chemical liquid storage part 25b of the syringe 25.

  And after passing one chemical | medical solution through the infusion line containing the chamber part 11 and discharge | releasing all the air in an infusion line outside, medicinal solution, such as a container, is punctured and indwelled in the patient's body. The chemical solution is supplied to the patient by feeding the patient toward the patient. Further, the other chemical solution in the chemical solution storage portion 25 b of the syringe 25 is also appropriately injected into the chamber portion 11 through the sub upstream pipe 14. In this case, the male luer portion 25a and the inner surface of the slit 20a are in close contact. Further, since the lower surface of the injection portion 20 approaches the upper end portion of the partition wall 17 and the distal end portion of the male luer portion 25a is located on the inner surface side of the partition wall 17, only a small space is created inside the sub upstream pipe 14. In the chamber part 11 and the sub-upstream pipe 14, it is difficult to generate a place where a part of the air or the chemical liquid stays.

  That is, since the space part inside the chamber part 11 and the sub upstream pipe 14 becomes all the flow paths of a chemical | medical solution, it becomes difficult to accumulate air. Thereby, it is suppressed that air mixes in the chemical | medical solution supplied to a patient. In addition, part of the chemical solution does not stay inside the chamber portion 11 and the sub upstream pipe 14. And when supply of the chemical | medical solution from the syringe 25 is complete | finished and the male luer part 25a is pulled out from the slit 20a, the injection | pouring part 20 will be released from the press by the male luer part 25a, and will return to an original state with restoring force. Further, according to this liquid co-infusion device A, the cap part 21 attached to the sub upstream pipe 14 is closed by the injection part 20, so that air enters the sub upstream pipe 14 from the opening of the sub upstream pipe 14 and the bacteria propagate. It can also be suppressed.

  Thus, in the liquid co-infusion device A according to the present embodiment, by providing the partition wall 16 and the partition wall 17 in the auxiliary upstream pipe 14 located at the upper part of the chamber portion 11, the chemical solution flowing from the main upstream pipe 12 is allowed to flow. After flowing from one side of the chamber part 11 into the sub-upstream pipe 14, it flows from the sub-upper pipe 14 to the downstream pipe 13 via the other side of the chamber part 11. For this reason, the chemical solution flows not only in the chamber part 11 but also in the auxiliary upstream pipe 14, and air does not stay in the chamber part 11 and the auxiliary upstream pipe 14, and does not flow. In addition, no chemical stays in the chamber 11 or the sub-upstream pipe 14.

  In this case, the chemical solution enters a wide part of the space on the rear side of the partition wall 17 in the auxiliary upstream pipe 14 from the chamber part 11, and then flows into the narrow part of the space on the front side of the partition wall 17 after exceeding the partition wall 17. It is possible to more reliably prevent air and liquid from staying in the portion 11. Accordingly, it is not necessary to perform a troublesome operation to remove the accumulated air, and it is possible to suppress the generation of bacteria in the chamber portion 11 and the sub upstream pipe 14. Further, since the partition wall 17 is formed around the moving area in the secondary upstream pipe 14 where the male luer portion 25a advances and retreats, another chemical solution is passed from the male luer portion 25a via the secondary upstream pipe 14 into the chamber portion 11. When the male luer part 25a is inserted deeply into the slit 20a of the injection part 20, the tip of the male luer part 25a does not contact the partition wall 17. For this reason, it is not necessary to enlarge the chamber part 11 and the sub upstream pipe 14 in order to provide the partition wall 17.

  In addition, since the shape of the central portion of the partition wall 17 in a plan view is a curved shape with a concave portion on the inner surface side, the male luer portion 25a located in the auxiliary upstream pipe 14 through the slit 20a of the injection portion 20 is inserted. The partition wall 17 is positioned along the periphery of the tip. For this reason, the front-end | tip part of the male luer part 25a which penetrates the slit 20a of the injection | pouring part 20 and the partition 17 can be made to approach, and, thereby, the dead space in the sub upstream pipe 14 can be minimized. Furthermore, since the cock 30 is provided in the chamber portion 11, the communication between the main upstream pipe 12, the downstream pipe 13 and the sub upstream pipe 14 provided in the liquid co-infusion device A can be arbitrarily switched.

(Second Embodiment)
FIG. 12 shows a liquid co-infusion device B according to the second embodiment of the present invention. In this liquid co-infusion device B, the inner surface of the partition wall 47 formed on the upper surface of the partition wall 46 is formed as an inclined surface, and the thickness of the partition wall 47 gradually decreases from the partition wall 46 side to the upper end side. About the structure of the other part of this liquid mixed injection tool B, it is the same as the liquid mixed injection tool A mentioned above. Accordingly, the same parts are denoted by the same reference numerals and the description thereof is omitted.

  According to this liquid mixture delivery device B, the portion facing the male luer portion 25a can be made thin while maintaining the strength of the partition wall 47. For this reason, the male luer portion 25a can be inserted below the center of the sub upstream pipe 14 in the vertical direction. Moreover, the partition wall 47 can be made closer to the moving region of the male luer part 25a, and the liquid co-infusion tool B can be reduced in size accordingly. Furthermore, since the corner (corner) sandwiched between the partition wall 46 and the partition wall 47 becomes an obtuse angle, air (bubbles) and chemicals are less likely to stay in this portion. Other functions and effects of the liquid mixture B are the same as the effects of the liquid mixture A described above.

(Third embodiment)
FIG. 13 shows a state in which a main body part, which is a main part of the liquid co-infusion device C according to the third embodiment of the present invention, is viewed from above. The main body of the liquid co-infusion device C has a substantially cylindrical chamber portion 51 (the inner surface of the bottom portion is shown in FIG. 13) arranged with the axial direction facing up and down, and 180 degrees on the left and right sides of the chamber portion 51. The main upstream pipe 52 and the downstream pipe 53 that extend substantially along the same axis while maintaining the angle of FIG. 5 are provided above the chamber section 51 so as to be orthogonal to the main upstream pipe 52 and the downstream pipe 53 and larger than the chamber section 51. It is comprised with the cylindrical sub upstream pipe 54 formed in the diameter. That is, this liquid co-infusion device C does not include a cock and a partition wall, and a partition wall 57 is formed at the bottom of the chamber portion 51.

  The partition wall 57 is connected to the downstream pipe 53 side portion in the chamber portion 51 with the front and rear portions of the inner peripheral surface in a state of being spaced from the left side portion of the inner peripheral surface of the chamber portion 51. In addition, the partition wall 57 is formed in a linear shape having front and rear portions extending in the front and rear directions in a plan view shown in FIG. 13, and a central portion is formed in an arc shape protruding toward the downstream pipe 53 side. For this reason, the chemical solution flowing from the main upstream pipe 52 to the downstream pipe 53 flows from the inside of the main upstream pipe 52 above the wide right side portion of the space of the chamber section 51, and then passes through the upper surface of the partition wall 57. And flows into the downstream pipe 53 from the lower left side of the chamber portion 51. About the structure of the other part of this liquid mixed injection tool C, it is the same as the liquid mixed injection tool A mentioned above. Accordingly, the same parts are denoted by the same reference numerals and the description thereof is omitted.

  According to this liquid co-infusion device C, other chemical liquids can be mixed from the sub upstream pipe 54 side to the chemical liquid supplied from the main upstream pipe 52 to the downstream pipe 53 side via the chamber portion 51. In addition, since this liquid co-infusion device C does not include a cock, it is not possible to switch the communication state between the main upstream pipe 52, the downstream pipe 53, and the sub upstream pipe 54. Other functions and effects of the liquid mixture delivery device C are the same as those of the liquid mixture delivery device A described above.

  Moreover, the liquid co-infusion device according to the present invention is not limited to the above-described embodiment, and can be modified as appropriate. In each of the above-described embodiments, the secondary upstream pipes 14 and 54 are formed in a cylindrical shape, and the partition walls 17, 47 and 57 are provided along the circumference of the secondary upstream pipes 14 and 54. The shape of the tube and the partition is not limited to this, and can be changed as appropriate. For example, the cross-sectional shape of the secondary upstream pipe is changed to a shape in which one side is configured by a semicircular portion having a smaller diameter than the secondary upstream tubes 14 and 54 described above, and the other side is configured by a semi-elliptical portion. A partition can be provided on the outer peripheral side of the elliptical portion. Further, the shape of the partition wall is not limited to the arc shape, but may be a flat shape or a curved shape other than the arc shape.

It is the perspective view which showed the liquid co-infusion tool concerning 1st Embodiment of this invention. It is a top view of a liquid co-infusion device. It is a front view of a liquid co-infusion device. It is a rear view of a liquid co-infusion device. It is a right view of a liquid co-infusion device. It is a left view of a liquid co-infusion device. It is sectional drawing of a liquid co-infusion device. It is the top view which showed the mixed injection tool main body. It is the front view which showed the state which inserted the syringe in the liquid co-infusion device. It is sectional drawing which showed the state which inserted the male luer part of the syringe in the slit of an injection | pouring part. It is the perspective view which showed the cock. It is sectional drawing which showed the liquid co-infusion device concerning 2nd Embodiment. It is the top view which showed the main body of the liquid mixture injection tool which concerns on 3rd Embodiment.

Explanation of symbols

  A, B, C ... Liquid co-infusion device, 11, 51 ... Chamber part, 12, 52 ... Main upstream pipe, 13, 53 ... Downstream pipe, 14, 54 ... Sub upstream pipe, 17, 47, 57 ... Bulkhead, 20 ... Injection part, 20a ... slit, 25 ... syringe, 25a ... male luer part, 30 ... cock.

Claims (5)

A chamber part, and a main upstream pipe, a downstream pipe and a sub upstream pipe connected to the chamber part, respectively, and a slit that can be opened and closed in accordance with the insertion / removal of the injection tool. A liquid co-infusion device provided with an elastic injection part,
A partition that regulates the liquid flowing in from the main upstream pipe from the direction toward the chamber portion to the sub upstream pipe side and then going from the chamber portion to the downstream pipe is provided as the sub upstream pipe or the chamber. A liquid co-infusion device, characterized in that it is formed around a moving area in which the tip of the injection tool advances and retracts so that the tip of the injection tool does not contact the partition wall.   The liquid co-infusion device according to claim 1, wherein the partition wall is configured by a wall portion in which at least an edge portion on the moving region side of the partition wall perpendicular to the moving region is formed in a concave curved shape.   When the injection device is inserted into the slit for a predetermined length, the inner surface of the slit is deformed and the injection device is pushed back by moving the injection device in the advancing direction. A substantially plate-shaped valve body that cannot be restored, and the partition is positioned around the tip of the injection tool when the injection tool is inserted into the slit at least the predetermined length. Item 3. A liquid co-infusion device according to item 1 or 2.   The thickness of the said partition is made to become so thin that it approaches the front-end | tip part located in the opening part side of the said sub upstream pipe from the base end part located in the said chamber part side. Liquid co-infusion device described in 1.   A liquid channel is formed between the chamber portion and the chamber portion, and is rotated in a predetermined direction so that the chamber portion and the main upstream pipe, the chamber portion and the downstream pipe, and the chamber portion and the chamber portion are rotated. The liquid co-infusion device according to any one of claims 1 to 4, wherein a cock capable of communicating with or blocking the sub upstream pipe is provided in the chamber portion.

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