Vacuum-Suction Injection Apparatus for Automated Drug Delivery
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Solution Overview
Problem
Existing injection apparatuses require repeated manual operation, leading to practitioner fatigue and significant drug loss, especially with low proficiency, as they necessitate inserting and removing needles multiple times during drug injection.
Innovation Solution
An injection apparatus utilizing vacuum suction pressure to automatically inject a predetermined dosage of drug by sensing the suction pressure with a microcomputer-controlled system, including a motor, solenoid valve, and suction pressure sensor, which inserts and retracts the needle assembly without manual operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual needle insertion and drug injection operation is performed repeatedly, then drug injection can be administered, but practitioner fatigue increases rapidly
Solution Approach 1:
The injection apparatus performs self-service by automatically inserting and retracting the needle assembly, and automatically injecting the drug based on vacuum suction detection, eliminating the need for repeated manual operations by the practitioner
Solution Approach 2:
The manual mechanical operation of needle insertion and drug injection is replaced by an automated system that uses vacuum suction pressure detection to trigger motor-driven needle actuation and drug injection
2Productivity
If automatic injection is performed without precise control, then injection speed increases, but considerable drug loss occurs
Solution Approach 1:
The system uses feedback from the vacuum suction pressure sensor to detect needle insertion into the skin and automatically controls the injection process, ensuring precise dosing and preventing drug loss through uncontrolled injection
Solution Approach 2:
Manual injection control is replaced by an automated motor-driven system that precisely controls piston movement based on vacuum detection signals, enabling accurate dosage delivery without practitioner error
3Device complexity
If needle insertion depth and suction pressure are not precisely controlled, then injection process is simplified, but bruising risk increases
Solution Approach 1:
The system precisely controls and adjusts suction pressure parameters and needle insertion depth to optimize injection conditions, minimizing skin trauma and bruising while maintaining an automated simple operation process
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
The apparatus reduces practitioner fatigue by automating the injection process, prevents drug loss by blocking further injection after the predetermined dosage, and allows for precise dosing with adjustable suction pressure, minimizing the risk of bruising.
Implementation Method 1
suction pressure generated through the first suction pipe (541), thereby vacuum suction pressure is generated at the needle assembly (120) brought into contact with the skin
Implementation Method 2
a suction pressure sensor (560) to sense the suction pressure generated through the first suction pipe (541)
Implementation Method 3
a solenoid valve (570) connected to the fifth suction pipe (545) to control opening and closing
Data Source
AI summary
The present invention uses an injection apparatus comprising: an injector which includes a mounting part on which a syringe is mounted, a needle assembly having a plurality of needles, a motor and a screw for actuating a piston of the syringe forward and backward; and a main body for controlling the forward and backward actuation of the piston of the syringe and drug injection. The present invention is configured as follows: a vacuum suction pressure is formed in the needle assembly that is in contact with the skin; injection is performed so that a drug is injected through a needle after it is determined that the needle is in close contact with the skin by comparing a sensed vacuum suction pressure value with a preset vacuum suction pressure value; and if injection is completed, the needle assembly is separated from the skin.