Remote Drug Injection Line With Backflow and Bubble Control
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Solution Overview
Problem
Existing methods for administering additional drugs to patients are hindered by the need for close proximity to the patient due to equipment or patient posture, and there is a risk of infection, making it difficult to access and inject drugs effectively.
Innovation Solution
A drug injection device with a first sub-line connected to a main line, a second drug injection part, and a second drug pumping part, allowing injection from a location away from the patient, using a pumping solution to push the second drug through a system of sub-lines and valves to ensure unidirectional flow and prevent backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate line or injector is connected to the medical fluid line for additional drug administration, then the additional drug can be administered, but the operation requires close proximity to the patient which becomes difficult when equipment surrounds the patient or patient posture limits access
Solution Approach 1:
The second sub-line for additional drug injection is nested within the first sub-line of the primary infusion system. The second drug injection part is connected to the first sub-line, allowing the additional injection line to be contained within the existing infusion line structure, enabling distant operation without adding external complexity
Solution Approach 2:
A pumping solution injector is introduced as an intermediary device to push the second drug through the first sub-line to the main line. This mediator enables the second drug to reach the patient through the existing infusion pathway without requiring direct connection to the patient, solving the accessibility problem
2Ease of operation
If a second drug injection part connected to the first sub-line is used to inject additional drug from a distance, then accessibility is improved, but the risk of fluid backflow and contamination increases
Solution Approach 1:
Backflow prevention valves are installed at critical points in the first sub-line and second sub-line to preemptively prevent fluid from flowing backward. These valves are positioned before backflow can occur, blocking the reverse flow path and preventing contamination from entering the injection system
Solution Approach 2:
The pumping solution injector acts as a controlled intermediary that unidirectionally pushes fluid forward. By using this mediator to actively propel the second drug through the system, the design ensures forward-only flow, preventing backflow and maintaining system reliability
3Ease of operation
If the second drug is injected into the first sub-line and pushed to the main line, then drug administration from distance is achieved, but foreign substances and bubbles may cause medical accidents
Solution Approach 1:
A filter is installed in the first sub-line at the connection point where the second sub-line joins. This porous filtering structure allows the second drug to pass through while blocking foreign substances, glass dust, and air bubbles, ensuring only clean fluid reaches the patient through the main line
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables convenient drug administration from a distance, filters foreign substances, and decomposes bubbles to prevent medical accidents, improving treatment efficiency and safety.
Implementation Method 1
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
Implementation Method 2
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
Implementation Method 3
a pumping solution injector for injecting a pumping solution to push the second drug injected into the first sub-line to the main line
Implementation Method 4
a sliding lock valve located in the third sub-line between a point where the third-subline is joined to the first sub-line and a point where the pumping solution suction line is connected, and selectively opening or closing the third sub-line
Implementation Method 5
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
Data Source
AI summary
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.