KR102268926B1 - Medical fluid injector having bolus counter - Google Patents

Abstract

The present invention provides a medicament injector comprising a housing, a bolus bag, a bolus button, and a bolus counter. The bolus bag includes a container with an open upper portion, a seat for shielding the upper portion of the container, and a check valve for opening and closing the chemical outlet of the container. The check valve is operated to open the chemical outlet when the internal pressure of the container rises.

Description

Medicine fluid injector with bolus counter {MEDICAL FLUID INJECTOR HAVING BOLUS COUNTER}

An embodiment of the present invention relates to a drug injector mainly used for the purpose of administering a liquid analgesic to a patient.

In general, opioid analgesics are administered to patients who require pain management for the purpose of pain relief. When opioid analgesics are administered in excess, cardiopulmonary arrest may occur due to respiratory difficulties due to muscle stiffness in the patient, and vice versa. It is very important to administer a certain amount within a predetermined range because the drug effect is reduced if the amount is small. Therefore, in the art, a drug injector that provides a drug solution such as an analgesic to a patient in a certain amount is used, and Korean Patent No. 10-1126213 and Korean Patent No. 10-1638969 disclose such a drug injector. are doing With reference to these publications, a chemical injector according to the prior art will be described as follows.

The prior art drug injector continuously injects the drug to the patient through the first transfer line, and additionally injects the drug to the patient through the second transfer line and the bolus device to increase the amount of the drug administered to the patient when necessary. It is configured to be able to increase temporarily. The bolus device includes a bolus bag on the second transfer line, and when the bolus button is operated, the bolus bag is pressed while the chemical solution stored in the bolus bag is discharged. .

According to the bolus device, the drug injector according to the prior art may additionally administer the drug by directly manipulating the bolus button according to the patient's condition, but the number of bolus injections according to the operation of the bolus button by the patient In order to prevent overdosage of the drug by managing the drug, the patient himself has to count and recognize the number of bolus injections, so there is a problem inevitably inconvenient in terms of use. In addition, since even an administrator (doctor, etc.) cannot accurately grasp the number of bolus injections made by a patient, there is a problem in that it is difficult to maximize the therapeutic effect by adjusting the dosage of the drug solution.

Republic of Korea Patent Publication No. 10-1126213 (2012.03.26.) Republic of Korea Registered Utility Model Publication No. 20-0465726 (2013.03.08.) Republic of Korea Patent Publication No. 10-1638969 (2016.07.12.) Republic of Korea Patent Publication No. 10-1739368 (2017.06.08.)

An embodiment of the present invention is to provide a medicament injector that allows a user (patient, administrator, etc.) to more accurately recognize the number of bolus injections.

Problems to be solved are not limited thereto, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, a housing provided with a button opening at an upper end (ceiling); A container disposed inside the housing and having a chemical inlet and a chemical outlet and having an open upper portion for storing a chemical in communication with the chemical inlet and the chemical outlet, a sheet that is deformed when the open upper portion of the container is shielded and pressurized; And, including a check valve for opening and closing the chemical outlet, a bolus bag; a bolus button comprising a button movably inserted into the button opening and a push rod extending downward from the button, wherein the push rod presses the seat when the button is moved downward by a pressing operation; A medicament injector may be provided, including a bolus counter configured to operate with the force of the button being pressed and moved downward, and to count the number of bolus injections according to the pressing operation of the button. At this time, the check valve may be operated to open the chemical solution outlet by the increased pressure when the seat is pressed by the push rod to increase the pressure inside the chemical solution storage.

Specifically, the check valve may include: a movable member passing through the chemical solution outlet to be movable along the chemical solution outlet; an opening and closing member provided on the movable member to open and close an outlet end of the chemical solution outlet according to a moving direction of the movable member; By including an elastic member for a check valve for imparting an elastic force to the movable member in a direction in which the opening and closing member closes the chemical outlet, the seat is pressed by the push rod to increase the internal pressure for storing the chemical, While the movable member overcomes the elastic force of the elastic member for the check valve, the opening and closing member may be moved in a direction in which the chemical solution outlet is opened.

The chemical outlet is formed in the vertical direction, the movable member may be movable in the vertical direction. In addition, the push rod may press the movable member by placing the sheet between the movable member and the movable member according to a distance moved downward when the sheet is pressed.

The bolus bag may further include a closing cap coupled to the container with the sheet placed between the container and the container.

A stop flange may be provided between the button and the push rod to contact the upper and lower surface of the housing to limit the upper movement of the button. The bolus counter includes a count disk rotatably fitted to the outer periphery of the push rod; first teeth provided along the circumferential direction at a predetermined angle unit on the upper surface of the count disk and each having a first inclined surface inclined in the circumferential direction; At least one second tooth provided to have a second inclined surface corresponding to the first inclined surface on the lower surface of the stop flange and rotating the count disk while the second inclined surface is in contact with the first inclined surface when moving downward; an elastic member for applying an elastic force to the count disk to move the count disk upward; The first inclined surface and the second inclined surface corresponding to each other in contact with the upper and lower surfaces of the housing when the count disk is moved upward by the elastic member protruding from the circumference of the count disk above the height of the first teeth a spacer to be spaced apart; Guide teeth provided along the circumferential direction by the set angle unit on the outer circumferential surface of the count disk, each having a first guide surface inclined in the same circumferential direction as the first inclined surface on the upper portion; A guide groove is provided on the inner periphery of the housing into which at least one of the guide teeth is fitted when the count disk is moved upward by the elastic member, and a second guide surface corresponding to the first guide surface is provided at the lower portion. It may include a formed guide. Accordingly, when the count disk is moved downward by the bolus button, it is rotated at a partial angle of the set angle by the first inclined surface and the second inclined surface corresponding to each other, and is moved upward by the elastic member. The first guide surface and the second guide surface may be rotated by the remaining angle of the set angle, and the second inclined surface may be arranged to correspond to another adjacent first inclined surface.

A button cover for protecting the button protruding through the button opening may be formed at the upper end of the housing to completely surround the rest except for one of the periphery of the button. The button cover may be provided with a clip for carrying or a strap connector for connecting a carrying strap.

The chemical injector according to an embodiment of the present invention may further include a button holder for maintaining the bolus bag in a pressurized state by moving the button downward. The button holder includes a body for pressing the button; It may include hooking legs disposed in the circumferential direction at the lower portion of the body and bent at the lower end in the circumferential direction. At the upper end of the housing, slots into which the locking legs are respectively inserted are provided in the circumferential direction, and when the locking legs are inserted into the slot and rotated, separation is prevented, and the button is pressed by the body when the lower end is caught in the slot length may be formed.

Means of solving the problem will be more specific and clear through the examples, drawings, etc. described below. In addition, various solutions other than the solutions mentioned below may be additionally suggested.

According to an embodiment of the present invention, the number of bolus injections can be accurately counted through the bolus counter and provided to a user such as a patient or an administrator. In addition, according to this method, it is possible to prevent the problem that the administration of the chemical solution is made excessively.

In addition, the treatment effect can be improved by establishing a treatment (pain management) strategy based on the number of bolus injections provided.

1 and 2 are perspective views showing a chemical injector according to a first embodiment of the present invention, viewed from different directions.
3 is an exploded perspective view showing the chemical injector according to the first embodiment of the present invention.
4 is a cross-sectional view illustrating the configuration and operation of the bolus bag of FIG. 3 .
FIG. 5 is a cross-sectional view showing a part of the bolus counter of FIG. 3 .
6 is a perspective view showing the bolus button and second teeth of FIGS. 3 and 5 .
7A and 7B are perspective views showing the count disk, first teeth, spacer, guide teeth and guide of FIGS. 3 and 5 ;
8 is an exploded perspective view showing a chemical injector according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. For reference, in the drawings referenced to describe the embodiment of the present invention, the size of the component, the thickness of the line, etc. may be expressed somewhat exaggeratedly for the convenience of understanding. In addition, the terms used to describe the embodiments of the present invention are mainly defined in consideration of functions in the present invention, and thus may vary according to the intentions and customs of users and operators. Therefore, it would be appropriate to interpret the terms based on the content throughout the present specification.

An embodiment of the present invention may be used to administer a drug solution, such as an analgesic or antibiotic, to an administration target such as a patient.

The configuration of the chemical injector according to the first embodiment of the present invention is shown in FIGS. 1 to 7 .

In Fig. 3, reference numerals 1 and 2 denote a chemical liquid inlet hose and a chemical liquid outlet hose, respectively. The drug solution from the drug solution source is sequentially provided to the drug solution administration target patient via the drug solution inlet hose 1 and the drug solution outlet hose 2 . The chemical liquid branching mechanism 3 is connected to the chemical liquid inlet hose 1 , and the chemical liquid merging mechanism 4 is connected to the chemical liquid outflow hose 2 . The chemical liquid branching mechanism 3 and the chemical liquid joining mechanism 4 are connected to each other by first and second two transfer lines 10 and 20 .

Referring to FIG. 3 , the chemical liquid branching mechanism 3 is a single inlet pipe 3i to which the chemical liquid inlet hose 1 is connected to the inlet, and the two transfer lines 10 and 20 branched from the inlet pipe 3i. It includes two flow rate control tubes (3a, 3b) respectively connected to either end of either end. For reference, the two flow control tubes 3a and 3b may be capillary tubes. The chemical liquid merging mechanism 4 is a single confluence pipe 4j having a chemical solution outlet hose 2 connected to the outlet, and branched from the confluent pipe 4j at the end of the other one of both ends of the two transfer lines 10 and 20 . It includes two branch pipes 4a and 4b connected respectively. An injection unit (eg, an injection needle or a catheter, etc.) for injecting the chemical to the patient may be connected to the tip of the chemical solution outlet hose 2 . As the first transfer line 10 and the second transfer line 20 , an elastically deformable silicone tube, a PVC tube, or the like may be applied.

The chemical injector according to the first embodiment of the present invention includes the chemical liquid inlet hose 1, the chemical liquid outlet hose 2, the chemical liquid branch mechanism 3, the chemical liquid confluence mechanism 4, and the first transfer line ( 10) and a second transfer line 10, 20 together with a housing 30, a bolus bag 40, a bolus button 50 and a bolus counter 60.

1 and 3 , the housing 30 includes housing bodies 30A and 30B and a housing cap 30C. The housing body 30A, 30B has an open top, and the housing cap 30C covers the open top of the housing body 30A, 30B. The housing 30 has an inner space defined by the housing bodies 30A and 30B and the housing cap 30C. The housing bodies 30A and 30B are composed of a left body 30A and a right body 30B coupled to each other in pairs. The housing cap 30C may be coupled to cover the upper portions of the housing bodies 30A and 30B to prevent the housing bodies 30A and 30B from being separated into the left body 30A and the right body 30B.

For reference, in the chemical liquid branching mechanism 3, the inlet of the inlet pipe 3i is exposed to the outside through the bottom of the housing 30 (the lower ends of the housing bodies 30A and 30B) in the inner space of the housing 30. It may be disposed in the lower region. In addition, the chemical liquid confluence mechanism 4 may be disposed in a lower region of the inner space of the housing 30 such that the outlet of the confluence pipe 4j is exposed to the outside through the bottom of the housing 30 .

Referring to FIG. 4 , the bolus bag 40 includes a container 41 having an open top structure in which a chemical solution is stored, and an expansion sheet 42 for shielding the open top of the container 41 . The container 41 has a chemical liquid inlet 41a and a chemical liquid outlet 41b to which the second transfer line 20 is connected, respectively. Specifically, the chemical liquid from the upstream side of the second transfer line 20 flows into the chemical liquid inlet 41a and is stored in the container 41, and the chemical liquid stored in the container 41 is transferred through the chemical liquid outlet 41b. It is configured to have a connection structure discharged to the downstream side of the second transfer line (20). The position of the bolus bag 40 is fixed while being accommodated in the inner space of the housing 30 . The bolus bag 40 may be disposed in an intermediate region of the inner space of the housing 30 .

As the expansion sheet 42 , a sheet made of a silicone material may be applied. The expansion sheet 42 is expanded to be convex upward by the chemical solution introduced into the container 41 through the chemical solution inlet 41a, and is restored to its original state when the stored chemical solution is discharged through the chemical solution outlet 41b. Of course, depending on the chemical storage capacity of the bolus bag 40, the expansion sheet 42 is maintained flat without convexly expanding upward even when the chemical is introduced, and is concavely deformed downward when pressed by an external force. When the external force is removed, it can be restored flat to its original state by its own elasticity or the chemical liquid flowing into the container 41 . The chemical solution outlet 41b is opened and closed by a check valve 43 , and the chemical solution stored in the container 41 is restricted from being discharged by the check valve 43 . The check valve 43 has a configuration that is opened when the internal pressure of the container 41 rises as the expansion seat 42 is pressurized by an external force (refer to FIG. 4 ( b )).

Reference numeral 44 in FIG. 4 denotes a closing cap constituting the bolus bag 40, and the closing cap 44 is formed in a ring shape. The closing cap 44 is coupled to the edge at the top of the container 41 , and the expansion sheet 42 is placed between the container 41 and ultrasonically fused to the container 41 to separate the expansion sheet 42 . and maintain airtightness between the container 41 and the inflation sheet 42 . Depending on the implementation conditions, the closing cap 44 may be bolted to the container 41 without being ultrasonically fused to the container 41 . Of course, the present invention is not limited thereto, and the closing cap 44 can be coupled in various other ways that can prevent separation of the expansion sheet 42 and maintain airtightness between the container 41 and the expansion sheet 42 . can

The chemical liquid from the chemical liquid supply source is transferred along the chemical liquid inlet hose 1, and the chemical liquid from the chemical liquid inlet hose 1 is branched from the chemical liquid branch mechanism 3 to the first transfer line 10 and the second transfer line 20 ), respectively. The chemical liquid flowing into the first transfer line 10 is continuously injected into the patient through the chemical liquid merging mechanism 4 and the chemical liquid outlet hose 2 in sequence. The chemical liquid introduced into the second transfer line 20 is stored in the bolus bag 40 . The chemical liquid stored in the bolus bag 40 is discharged from the bolus bag 40 to the downstream side of the second transfer line 20 when the expanded expansion sheet 42 is pressed by an external force, and the chemical liquid merging mechanism (4) is combined with the chemical solution from the first transfer line 10, and then is injected into the patient through the chemical solution outlet hose (2).

The check valve 43 includes a lifting rod 431 and a lifting member (movable member) including a base 432 at the lower end of the lifting rod 431 . The lifting rod 431 and the base 432 may be integrally formed. The base 432 is formed to have a larger cross-sectional area than the exit end of the chemical solution outlet (41b). The base 432 is disposed at the exit end of the chemical solution outlet 41b, and the lifting rod 431 is movably passed through the chemical solution outlet 41b in the vertical direction along the chemical solution outlet 41b so that the upper end of the chemical solution outlet 41b ) is placed toward the inlet end.

The check valve 43 further includes a rubber cone 433 which is an elastic member for the check valve and an opening/closing member 434 made of an elastic material for opening and closing the outlet end of the chemical solution outlet 41b.

The rubber cone 433 applies an elastic force to the elevating members 431 and 432 so that the elevating members 431 and 432 are raised. The upper part is coupled to the lifting rod 431 in a state of being fitted to the outer periphery of the , and the lower end is supported around the inlet end of the chemical solution outlet (41b). The lifting rod 431 may have a hook for preventing the rubber cone 433 from being separated.

The opening/closing member 434 is interposed between the outlet end of the chemical solution outlet 41b and the base 432, is formed to have a larger cross-sectional area than the base 432, and due to the action of the rubber cone 433, the chemical solution outlet ( 41b) close to the periphery of the exit end to keep the chemical solution outlet 41b in a closed state.

In Fig. 4, reference numeral 41c denotes a communication path formed with a groove for communicating the circumference of the inlet end of the chemical solution outlet 41b and the inside of the chemical solution outlet 41b. The communication path 41c prevents the lower end of the rubber cone 433 from being in close contact with the inlet end of the chemical solution outlet 41b to delay or block the chemical injection into the chemical solution outlet 41b.

On the other hand, depending on the implementation conditions, etc., by applying a spring instead of the rubber cone 433 to apply an elastic force to the lifting members 431 and 432, the chemical solution outlet 41b may be maintained in a closed state by the opening and closing member 434. .

Referring to FIGS. 1 and 3 , the button opening 31 penetrates vertically from the upper end to the central portion of the housing cap 30C constituting the ceiling of the housing 30 . In addition, a bolus button 50 is disposed in the button opening 31 . Referring to FIGS. 3 and 6 , the bolus button 50 is an upper button 51 inserted into the button opening 31 so as to be linearly movable in the vertical direction, and a straight line downward from the button 51 . It includes a lower push rod (52) extended to have a structure, and a stop flange (53) provided between the button (51) and the push rod (52). As shown in FIG. 5 , the push rod 52 may be disposed in the upper region in the inner space of the housing 30 together with the stop flange 53 .

The push rod 52, when the button 51 is pressed, moves in the downward direction together with the button 51 to press the expanded expansion sheet 42 so that the chemical solution in the bolus bag 40 is discharged, and continues downward When moving to , the lifting members 431 and 432 of the check valve 43 are pressed with the expansion seat 42 interposed therebetween. When the inflated expandable sheet 42 is pressed, the opening/closing member 434 may be deformed by the internal pressure of the raised bolus bag 40 to release the closed state of the chemical solution outlet 41b. At this time, the lifting members 431 and 432 may also be lowered to some extent. When the check valve 43 is pressed, the lifting members 431 and 432 are lowered so that the opening/closing member 434 is spaced apart from the outlet end of the chemical liquid outlet 41b and its surroundings.

The stop flange 53 contacts the bottom surface of the upper end of the housing cap 30C to limit the upward movement of the button 51 .

The bolus counter 60 is configured to operate by the force of the bolus button 50 being operated and the button 51 being moved downward, and to count the number of bolus injections according to the operation of the bolus button 50 . The bolus counter 60 includes a count disc 61 , first teeth 62 , second teeth 63 , an elastic member 64 , a spacer 65 , and a guide tooth 66 . and at least one pair of guides (guides 67).

3 and the like, the count disk 61 is rotatably fitted around the push rod 52 to the outer periphery of the push rod 52 having a circular cross section. To this end, as shown in FIG. 7A , a through hole is formed in the central portion of the count disk 61 in the vertical direction.

5, 6, 7A, etc., the first teeth 62, the bar protruding at the same height from the upper surface of the count disk 61, the count disk 61 in a preset angle unit set in advance on the upper surface of the It is provided along the circumferential direction (eg, 24 first teeth may be provided in units of 15 degrees), and each has a first inclined surface 62a inclined in the circumferential direction. The second teeth 63 are provided along the circumferential direction in the same set angle unit as the first teeth 62 on the lower surface of the stop flange 53, protruding at the same height from the lower surface of the stop flange 53, , respectively, is formed to have a second inclined surface 63a of a shape corresponding to the first inclined surface 62a, and when moving downward with the stop flange 53, the second inclined surface 63a is formed with the first inclined surface 62a and The count disk 61 is rotated while making contact.

The elastic member 64 is a coil spring, and serves to apply a predetermined elastic force to the count disk 61 to move the count disk 61 moved downward together with the bolus button 50 upward. do

The spacer 65 protrudes from the circumference of the count disk 61 beyond the height of the first teeth 62 , so that when the count disk 61 is moved upward by the elastic member 64 , the upper end of the housing cap 30C The first inclined surface 62a and the second inclined surface 63a corresponding to each other are spaced apart in contact with the bottom surface of the (see FIG. 5).

7A and 7B, the guide teeth 66 are provided along the circumferential direction in the same set angle unit as the first teeth 62 on the outer circumferential surface of the count disk 61, and the first It has a first guide surface 66a formed in a shape inclined in the same circumferential direction as the inclined surface 62a. The pair of guides 67 is a guide in which at least one of the guide teeth 66 is fitted when the count disk 61 is moved upward by the elastic member 64 on the inner periphery of the housing 30 . A groove 67b is provided, and a second guide surface 67a corresponding to the first guide surface 66a is formed in the lower portion.

In the bolus counter 60 as described above, when the count disk 61 is moved downward by the pressing operation of the button 51, the first inclined surface 62a and the second inclined surface 63a corresponding to each other When it is rotated at some angle (for example, 7.5 degrees) of the set angle and moved upward by the elastic member 64 as the pressing operation of the button 51 is released, the first guide surface 66a and the second guide surface ( 67a) by the remaining angle (eg, 7.5 degrees) of the set angle, the second inclined surface 63a corresponds to the other adjacent first inclined surface 62a.

Of course, when the button 51 is pressed again afterward, the count disk 61 is rotated again to the set angle, and the second inclined surface 63a corresponds to the next adjacent first inclined surface 62a, and the button 51 is rotated again. When is pressed again, the count disk 61 is set to rotate again to a set angle. Therefore, it is possible to rotate the count disk 61 in units of a set angle only by pressing the button 51 .

Referring to FIGS. 5 and 7A , the spacer 65 is formed in a ring shape, and a display unit 65a for displaying the number of bolus injections is provided on the upper surface. The display unit 65a may be a number displayed on the upper surface of the spacer 65 in units of a set angle along the circumferential direction. 1 and 3 , a display opening 32 exposing the display portion 65a is provided at the upper end of the housing cap 30C. The display opening 32 may be formed to have a size to expose only a number indicating the number of times of bolus injection.

1 to 3 , at the upper end of the housing cap 30C, a button cover 34 for protecting the button 51 protruding upward through the button opening 31 is disposed around the button 51 . It is formed so as to completely surround the rest except for either one. According to the button cover 34 formed in this way, it is possible to prevent the button 51 from being unintentionally pressed and bolus injection is made. 1 and 2 , the button cover 34 may be provided with a clip 71 for portability, and a hole or the like may be provided as a string connector 35 for connecting the portable string 72. may be

The chemical injector according to the first embodiment of the present invention temporarily stores the chemical from the bolus bag 40 and continuously flows the stored chemical to the chemical solution outlet hose 2 to operate the bolus button 50 again. It further includes a drug solution continuous outflow means 90 for additionally providing the drug solution to the patient for a predetermined time without doing so. The chemical solution continuous outflow means 90 may be connected to the chemical solution outlet 41b of the container 41 constituting the bolus bag 40 and the downstream inlet end of the second transfer line 20 so that the chemical solution can flow, It may be disposed in a lower region of the inner space of the housing 30 .

The drug solution continuous outflow means 90 includes a balloon and a backflow prevention mechanism. When the button 51 is pressed, the drug solution to be additionally administered to the patient flows into the balloon and after the balloon is inflated. , the balloon is contracted by its own restoring force to discharge the chemical solution stored in the balloon, and has a configuration in which the backflow is prevented by the backflow prevention mechanism when the chemical solution is discharged. Since the drug solution continuous outflow means 90 is configured and operates substantially the same as or similarly to the drug solution continuous outflow means disclosed in Korean Patent Publication No. 10-1126213, a detailed description thereof will be omitted.

Reference numeral 80 in FIG. 1 is a button holder for maintaining the bolus bag 40 in a pressed state by moving the button 51 downward. 1 and 2, the button holder 80 is disposed along the circumferential direction under the plate-shaped body 81 for pressing the button 51, and the plate-shaped body 81, and the lower end is the circumference It includes a plurality of legs 82 bent in the direction. A handle 83 may be provided on the upper portion of the body 81 . The handle 83 may be formed in a shape protruding upward. With the handle 83 , the user can easily handle the button holder 80 .

1 and 3, at the upper end of the housing cap 30C, a slot 33 into which each of the legs 82 of the button holder 80 is inserted from the upper side to the lower side is provided at regular intervals along the circumferential direction. is prepared with When the legs 82 are respectively inserted into the slots 33 and rotated, separation (movement in the upward direction) is prevented from the housing cap 30C, and when the bent lower ends are caught in the slots 33 , they are attached to the body 81 . By this, the button 51 is formed with a pressed length. At this time, the push rod 52 presses the check valve 43 and lowers the lifting members 431 and 432 to separate the opening/closing member 434 from the outlet end of the chemical solution outlet 41b and its surroundings.

According to the button holder 80 having such a configuration, in the chemical injector according to the first embodiment of the present invention, since the bolus bag 40 is maintained in a pressurized state, the chemical liquid flow path before use on a patient - that is, Priming that flows chemical liquid through chemical liquid inlet hose (1), chemical liquid outlet hose (2), chemical liquid branch mechanism (3), chemical liquid merging mechanism (4), transfer lines (10, 20), etc. to discharge air from chemical liquid flow path ( During the priming) operation, it is possible to significantly reduce the time the chemical is stored in the bolus bag 40 , whereby the priming operation can be performed quickly. The chemical injector according to the first embodiment of the present invention is used in a state in which the button holder 80 is removed after the priming operation is completed.

A chemical injector according to a second embodiment of the present invention is shown in FIG. 8 . As shown, the chemical injector according to the second embodiment of the present invention, compared with the first embodiment of the present invention, other configurations and actions are all the same, with respect to the first transfer lines (10a, 10b) ) is different only in that it further includes a flow control device (95, 96) for controlling the flow rate of the drug continuously injected to the patient through.

The first transfer lines 10a and 10b are provided in plurality, and accordingly, the chemical liquid branching mechanism 3 and the chemical liquid joining mechanism 4 are respectively three or more flow control tubes 3a, 3b, 3c and three or more branch pipes ( 4a, 4b, 4c). Among the flow control pipes (3a, 3b, 3c), the flow control pipes respectively connected to the first transfer lines (10a, 10b) are configured so that the chemical liquid flows at different flow rates.

The flow control device (95, 96), the rotatable knob (knob, 95), and the first transfer lines (10a, 10b) according to the rotation angle of the knob (95) by selectively opening and closing the first transfer line (10a, and a conduit opening/closing means 96 for opening all 10b) or closing at least one of the first transfer lines 10a and 10b.

Reference numeral 36 in FIG. 8 denotes a knob opening, and the knob 95 rotatably disposed in the inner space of the housing 30 is exposed to the outside through the knob opening 36 of the housing bodies 30A and 30B.

Such flow control devices 95 and 96 and their related configurations are configured and operated substantially the same as or similar to flow control devices disclosed in Korean Patent Publication Nos. 10-1638969 and 10-1739368, and thus, A more detailed description will be omitted.

Although the present invention has been described above, the present invention is not limited by the disclosed embodiments and the accompanying drawings, and various modifications may be made by those skilled in the art without departing from the technical spirit of the present invention. In addition, the technical ideas described in the embodiments of the present invention may be implemented independently, or two or more may be implemented in combination with each other.

10: first transfer line
20: second transfer line
30: housing
31: button opening
32: display opening
40: bolus bag
41: courage
42: inflatable sheet
43: check valve
50: bolus button
51: button
52: push rod
53: stop flange
60: bolus counter
61: count disk
62: first tooth
63: second tooth
64: elastic member
65: spacer
66: guide tooth
67: Guide

Claims (5)

a housing having a button opening provided at an upper end thereof;
A container disposed inside the housing and having a chemical inlet and a chemical outlet in the vertical direction and having an open upper part for storing the chemical in communication with the chemical inlet and the chemical outlet, and shielding and pressing the open upper part of the container; A bolus bag comprising a seat, and a check valve for opening and closing the chemical outlet;
a bolus button comprising a button movably inserted into the button opening and a push rod extending downward from the button, wherein the push rod presses the seat when the button is moved downward by a pressing operation;
and a bolus counter configured to count the number of bolus injections according to the pressing operation of the button, which operates with the force of the button being pressed and moved downward;
The check valve may include: a movable member penetrating through the chemical solution outlet to be movable in a vertical direction along the chemical solution outlet; an opening and closing member provided on the movable member to close the chemical solution outlet when the movable member ascends and open the chemical solution outlet when the movable member descends; By including an elastic member for a check valve for applying an elastic force to the movable member in a direction in which the movable member is raised, when the seat is pressed by the push rod and the pressure inside the chemical solution storage is increased, the movable member is The check valve descends while overcoming the elastic force of the elastic member for the opening and closing member to open the chemical solution outlet,
The push rod lowers the movable member by placing the sheet between the movable member and the movable member according to a distance moved downward when the sheet is pressed, and pressing the movable member,
drug injector. The method according to claim 1,
further comprising a button holder for holding the button in a depressed state;
drug injector. delete The method according to claim 1 or 2,
The bolus bag further comprises a closing cap coupled to the container with the sheet between the container and the container,
drug injector. The method according to claim 1 or 2,
A stop flange is provided between the button and the push rod to limit the upper movement of the button in contact with the upper bottom surface of the housing,
The bolus counter is
a count disk rotatably fitted to the outer periphery of the push rod;
first teeth provided along the circumferential direction at a predetermined angle unit on the upper surface of the count disk and each having a first inclined surface inclined in the circumferential direction;
At least one second tooth provided on a lower surface of the stop flange to have a second inclined surface corresponding to the first inclined surface and rotating the count disk while the second inclined surface is in contact with the first inclined surface when moving downward;
an elastic member for applying an elastic force to the count disk to move the count disk upward;
The first inclined surface and the second inclined surface corresponding to each other in contact with the upper and lower surfaces of the housing when the count disk is moved upward by the elastic member protruding from the circumference of the count disk above the height of the first teeth a spacer to be spaced apart;
Guide teeth provided along the circumferential direction by the set angle unit on the outer circumferential surface of the count disk, each having a first guide surface inclined in the same circumferential direction as the first inclined surface on the upper portion;
A guide groove is provided on the inner periphery of the housing into which at least one of the guide teeth is fitted when the count disk is moved upward by the elastic member, and a second guide surface corresponding to the first guide surface is provided at the lower portion. By including a guide formed,
When the count disk is moved downward by the bolus button, it is rotated at a partial angle of the set angle by the first inclined surface and the second inclined surface corresponding to each other, and when moved upward by the elastic member, the second Rotated by the remaining angle of the set angle by the first guide surface and the second guide surface, the second inclined surface is arranged to correspond to the other adjacent first inclined surface,
drug injector.

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