Disposable Array Micro Injection Needle Head for Rapid Insulin Delivery
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Solution Overview
Problem
Existing insulin injection devices face challenges in performing vertical hypodermic injections rapidly, leakproofly, painlessly, and conveniently at various sites without muscle injection, leading to suboptimal patient adherence and glycemic control in diabetes management.
Innovation Solution
A disposable array-type micro injection needle head with multiple thin, short needle tubes and a prefilled syringe design, allowing for simultaneous vertical injection without skin pinching, featuring a cylindrical column, upper and lower needle seats, and a pipetting needle for efficient medication delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single needle tube is used for injection, then the injection device is simple in structure, but the injection time is long and patient adherence is reduced
Solution Approach 1:
The single needle tube is segmented into multiple needle tubes (e.g., 5 needle tubes arranged in a cross pattern) within the same needle head. This allows simultaneous injection at multiple sites, dramatically reducing injection time while maintaining structural simplicity through the integrated needle head design.
2Reliability
If a long needle tube is used to ensure subcutaneous injection, then injection depth is sufficient, but pain is increased and patient adherence is reduced
Solution Approach 1:
The needle tubes are designed with locally optimized properties: thin walls (0.03-0.08mm thickness) and small outer diameter (0.2-0.4mm) to minimize pain, while maintaining sufficient length (3-12mm) to ensure subcutaneous injection depth. The needle head structure ensures proper positioning to achieve reliable subcutaneous delivery without excessive length that would cause pain.
3Reliability
If the needle head stays in the skin for 6-10 seconds as instructed, then insulin absorption is complete, but medicine liquid drops off the needle head
Solution Approach 1:
The needle head structure includes a flared base and positioning features that pre-establish proper insertion depth and angle. The multiple needle tubes are arranged to optimize distribution, and the needle head geometry preliminarily ensures correct positioning to prevent drop-off while maintaining absorption completeness.
4Ease of operation
If injection is performed at the same site repeatedly, then injection technique is simple, but subcutaneous fat tissue hyperplasia and sclerosis occur
Solution Approach 1:
The injection site is segmented into multiple locations through the array of needle tubes (e.g., 5 tubes in cross pattern). This allows simultaneous injection at multiple sub-sites within the injection area, preventing repeated injection at the exact same spot and avoiding fat tissue hyperplasia while maintaining simple operation through a single needle head insertion.
Data Source
AI summary
The invention discloses a disposable array-type micro injection needle head which comprises a lower needle seat which is configured as a cylindrical column opening at one end and having a top cap at the other end and which is configured to be connected with an injection reservoir; an upper needle seat which is located above the top cap of the lower needle seat with a cavity formed between the upper needle seat and the top cap; a through-hole formed in the top cap which is configured for communicating the cylindrical column with the cavity, wherein a pipetting needle is mounted in the through-hole which has one end communicated with the cavity and the other end located in the cylindrical column and which is configured for extracting injection from the injection reservoir into the cavity; and at least two needle tubes mounted in the upper needle seat, each of which has one end comprising a needle tip for puncturing and for injecting the injection and the other end for mounting on the upper needle seat and for communicating with the cavity. The needle head can be used directly on existing insulin pen, or the cylindrical column can be provided inside it with an injection reservoir to form a disposable prefilled syringe. By using a plurality of thin, short needle tubes for injecting simultaneously, vertical hypodermic injection of medicines such as insulin can be preformed rapidly, leakproof, painlessly, safely and conveniently at various sites of a human body, without needing to pinch skin, while a potential trouble that the medicines be injected into muscles can be avoided. Patient adherence to the treatment regimen and the treatment effect are improved.