Low Volume Accurate Injector Pulsatile Pressure Control
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Solution Overview
Problem
Existing substance administration technologies, such as mesotherapy and insulin pens, face challenges in accurately delivering small, controlled doses of viscous substances like collagen and Botox to the skin with minimal discomfort, often using large needles that cause pain and leakage due to inadequate dosage regulation and needle size.
Innovation Solution
A hand-held device with a dosage regulator that uses a small-diameter needle (0.3-2.5 mm in length and <0.23 mm in diameter) and an electronic motor for pulsatile pressure delivery, allowing user-selectable dosages from 1-50 ul, specifically designed for viscous substances like Botox, which reduces discomfort and minimizes leakage by controlling the pressure and rate of injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional syringes and large needles are used for mesotherapy, then substance administration is possible, but dosage accuracy deteriorates and patient discomfort increases
Solution Approach 1:
The syringe barrel is divided into multiple discrete dose compartments, each containing a specific volume of substance. This segmentation allows precise control of dosage by injecting one compartment at a time, achieving accurate dosing while minimizing the total volume that causes discomfort.
Solution Approach 2:
The plunger assembly incorporates a spring mechanism that provides dynamic resistance during injection. This dynamic control allows the system to regulate pressure and flow rate automatically, improving dosage accuracy and reducing patient discomfort by controlling the injection rate.
2Ease of operation
If conventional syringes are used without dosage regulation, then substance administration is simple, but dosage control precision deteriorates
Solution Approach 1:
The syringe barrel is divided into multiple discrete dose compartments, each containing a specific volume of substance. This segmentation allows precise control of dosage by injecting one compartment at a time, achieving accurate dosing while minimizing the total volume that causes discomfort.
Solution Approach 2:
The spring mechanism in the plunger assembly provides automatic pressure regulation during injection. The system self-regulates the injection rate and pressure without requiring external control, maintaining ease of operation while improving dosage control precision through mechanical feedback.
3Productivity
If large needles are used for injection, then substance delivery is efficient, but leakage increases and patient discomfort worsens
Solution Approach 1:
The syringe barrel is divided into multiple discrete dose compartments, each containing a specific volume of substance. This segmentation allows precise control of dosage by injecting one compartment at a time, achieving accurate dosing while minimizing the total volume that causes discomfort.
Solution Approach 2:
The system changes the physical parameters of injection by using smaller needle gauges and controlling injection pressure through the spring mechanism. This parameter change reduces substance leakage while maintaining delivery efficiency through controlled, gradual injection of smaller volumes.
4Reliability
If multiple small injections are administered, then treatment coverage is improved, but procedure time increases
Solution Approach 1:
The syringe barrel is divided into multiple discrete dose compartments, each containing a specific volume of substance. This segmentation allows precise control of dosage by injecting one compartment at a time, achieving accurate dosing while minimizing the total volume that causes discomfort.
Solution Approach 2:
The spring mechanism enables continuous, automatic pressure regulation throughout the injection process. This continuous action allows multiple small doses to be administered in a smooth, uninterrupted manner, improving treatment coverage while minimizing procedure time through efficient, flowing injection.
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 device enables precise, painless administration of substances by regulating the pressure and volume of viscous substances through small needles, improving dosage accuracy and reducing discomfort associated with multiple injections.
Implementation Method 1
the motor being actuated by the dosage regulator in a pulsatile manner so as to produce brief periods of high pressure in the apparatus that expel a predetermined volume of the substance through the needle at a controlled rate
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Substance-administration apparatus (20) is provided, including a housing (22), and a needle (80), couplable to the housing (22), having a skin-insertion portion 0.3-2.5 mm in length and an outer diameter less than 0.23 mm. A dosage regulator (60) regulates a dosage of substance injected in a single injection through the needle (80). Dosage is selectable by a setting of the dosage regulator (60) as one of a plurality of selectable dosages. At least one dosage is less than or equal to 10 ul. An injection driver (54), activatable by a user, drives the substance through the needle (80). A motor coupled to the injection driver (54) is actuated by the dosage regulator (60) in a pulsatile manner to produce brief periods of high pressure in the apparatus (20) that expel a predetermined volume of the substance through the needle (80) at a controlled rate. Other applications are also described.