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US-12616789-B2 - Extensible drug injection device and operation method therefor

US12616789B2US 12616789 B2US12616789 B2US 12616789B2US-12616789-B2

Abstract

The present invention relates to an extensible drug injection device capable of injecting a drug from a location away from a patient, and an operation method therefor. Disclosed is a drug injection device comprising: a first sub-line of which one end joins with a main line, connected from a first drug storage part for storing a first drug to be injected into a patient to the body of the patient such that the first drug flows therein, and of which the other end is extended to the other side; a second drug injection part which is connected to the first sub-line and which injects a second drug that is different from the first drug; and a second drug pumping part which is connected to the first sub-line, and which pushes, to the main line, the second drug having been injected by the second drug injection part into the first sub-line.

Inventors

  • Hyunjung KOH

Assignees

  • THE CATHOLIC UNIVERSITY OF KOREA INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Dates

Publication Date
20260505
Application Date
20200604
Priority Date
20190605

Claims (10)

  1. 1 . A drug injection device, comprising: a first sub-line of which a first end joins with a main line, connected from a first drug storage part for storing a first drug to be injected into a body of a patient such that the first drug flows therein; a second drug injection part which is connected to a second end of the first sub-line and is configured to apply pressure to inject a second drug that is different from the first drug; and a second drug pumping part which is connected to the first sub-line, and is configured to apply pressure to push the second drug which has been injected into the first sub-line by the second drug injection part toward the main line, wherein the second drug pumping part comprises: a pumping solution injector for injecting a pumping solution to push the second drug into the main line; a third sub-line for connecting the pumping solution injector to the first sub-line; a pumping solution suction line branched from the third sub-line at a location between the pumping solution injector and a junction where the third sub-line joins with the first sub-line, the pumping solution suction line defining a flow path for supplying a pumping solution to be sucked into the pumping solution injector; and a sliding lock valve located on the third sub-line between the junction where the third sub-line joins with the first sub-line and a point where the pumping solution suction line is coupled, wherein the sliding lock valve comprises: a valve body including a communication hole which is open at both ends to be connected to a tube of the third sub-line and defines a fluid passage through the valve body, and a sliding slit formed in a direction intersecting the communication hole; and a shutter disposed within the sliding slit and configured to block a fluid flow or regulate a flow rate through the communication hole according to a sliding movement of the shutter, wherein a protrusion having elasticity is formed at a predetermined interval in one of the sliding slit or the shutter in contact with the sliding slit, and a groove is formed at an interval corresponding to the predetermined interval of the protrusion in the other one of the sliding slit or the shutter in contact with the sliding slit such that the protrusion and the groove are snapped by elasticity.
  2. 2 . The drug injection device of claim 1 , wherein the second drug injection part comprises: a second drug injector for injecting the second drug; and a second sub-line for connecting the second drug injector to the first sub-line.
  3. 3 . The drug injection device of claim 1 , wherein the pumping solution suction line is in communication with the first drug storage part.
  4. 4 . The drug injection device of claim 1 , wherein one end of the pumping solution suction line connected to the third sub-line is formed to have a curved end in the third sub-line towards the pumping solution injector.
  5. 5 . The drug injection device of claim 1 , wherein the third sub-line is joined with the first sub-line at a point where the second drug injection part is connected to the first sub-line or at a rear side thereof.
  6. 6 . The drug injection device of claim 1 , wherein an amount of the pumping solution injected by the pumping solution injector at once is equal to or more than an internal volume of the first sub-line.
  7. 7 . The drug injection device of claim 1 , further comprising a backflow prevention valve disposed at any one point selected from a point where the first sub-line is connected to the main line, a point where the second drug injection part is connected to the first sub-line, or a point where the second drug pumping part is connected to the first sub-line, wherein the backflow prevention valve is configured to restrict a flow of the drug or pumping solution.
  8. 8 . The drug injection device of claim 7 , wherein the backflow prevention valve comprises: a rim in close contact with an inner circumferential surface of a tube forming the first sub-line to the third sub-line; one or more membranes formed of a flexible material and curved to form at least a portion of a hemisphere while protruding from the rim to a front side in a flow direction of a fluid, and formed to be closed while overlapping each other when the fluid flows in a direction opposite to a flow and to be opened when the fluid flows in a flow direction; and a fine mesh formed on the rim and provided behind the membrane.
  9. 9 . The drug injection device of claim 1 , wherein the shutter comprises: a slate inserted into the sliding slit to adjust a degree of opening of the communication hole; a handle formed on one side of the slate so as to be exposed from the sliding slit to the outside of the valve body; and a bent part connecting the slate and the handle and provided to be bent on one side.
  10. 10 . The drug injection device of claim 1 , further comprising a housing for accommodating the second drug injection part and the second drug pumping part.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a national phase application under 35 U.S.C. § 371 of International Application No. PCT/KR2020/007269, filed Jun. 4, 2020, which claims priority to and the benefit of Korean Patent Application No. 10-2019-0066817 filed on Jun. 5, 2019, the contents of which applications are incorporated herein by reference in their entirety. BACKGROUND Field of the Disclosure The present invention relates to an extensible drug injection device and an operation method therefor, and more specifically to an extensible drug injection device capable of injecting a drug from a location away from a patient and an operation method therefor. Description of Related Art In clinical treatment of patients, a method of administering a medical fluid for the purpose of treatment is frequently applied. The medical fluid is placed in a bag or bottle containing the medical fluid or drug at a position higher than the patient, and the medical fluid is continuously administered by connecting a medical fluid line to the patient through the medical fluid line. Meanwhile, when an additional drug or injection solution is to be administered to the patient, a separate line may be connected to the medical fluid line, or the drug may be administered by an injector. However, this method needs to be carried out in close proximity to the patient, and there is a need for a method of solving this problem because there are cases where it is difficult to access because there are a lot of equipment or medical devices installed around the patient, and where it may be difficult to inject a drug if access is difficult due to the patient's posture or the risk of infection. SUMMARY OF THE INVENTION The present invention has been devised in view of the above points, and it is an object of the present invention to provide an extensible drug injection device capable of injecting an additional drug from a location away from a patient. The problems of the present invention are not limited to the problem mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description. According to one aspect of the present invention for solving the aforementioned problem, disclosed is a drug injection device, including a first sub-line of which one end joins with a main line, connected from a first drug storage part for storing a first drug to be injected into a patient to the body of the patient such that the first drug flows therein, and of which the other end is extended to the other side, a second drug injection part which is connected to the first sub-line and which injects a second drug that is different from the first drug, and a second drug pumping part which is connected to the first sub-line, and which pushes, to the main line, the second drug having been injected by the second drug injection part into the first sub-line. The second drug injection part may include a second drug injector for injecting a second drug and a second sub-line for connecting the second drug injector to the first sub-line. The second drug pumping part may include a pumping solution injector for injecting a pumping solution to push the second drug injected into the first sub-line to the main line, and a third sub-line for connecting the pumping solution injector to the first sub-line. The drug injection device may further include a pumping solution suction line connected to the third sub-line between a point where the third sub-line is joined to the first sub-line and the pumping solution injector, and supplying a pumping solution suctioned by the pumping solution injector. The pumping solution suction line may be in communication with the first drug storage part. One end of the pumping solution suction line connected to the third sub-line may be formed to have a curved end in the third sub-line towards the pumping solution injector. The third sub-line may be joined with the first sub-line at a point where the second drug injection part is connected to the first sub-line or at a rear side thereof. The amount of a pumping solution injected by the pumping solution injector at once may be equal to or more than the internal volume of the first sub-line. The drug injection device may further include a backflow prevention valve provided at one or more points of a point where the first sub-line is connected to the main line, a point where the second drug injection part is connected to the first sub-line, and a point where the second drug pumping part is connected to the first sub-line, and provided such that the flow of the drug or pumping solution flows only towards the main line. Alternatively, the drug injection device may further include a backflow prevention valve provided in the pumping solution suction line such that the flow of the pumping solution flows only towards the main line. The backflow prevention valve may include a rim in close contact with an inner circumf