Infusion Insertion Device with Automatic Detachment
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Solution Overview
Problem
Existing insertion devices for infusion sets and sensor arrangements cause pain and irritation during application and are complex to use, with prior solutions either irritating the puncture site upon detachment or requiring numerous operating steps.
Innovation Solution
An insertion device with a housing and holding means, featuring opposing leaf spring elements or spring shackles, allows the insertion head to be temporarily held and then moved independently for piercing, with a drive mechanism enabling cannulas or piercing tips to protrude and penetrate the skin, separating from the device to avoid irritation and simplify application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insertion head is held firmly by the holding means during insertion, then the insertion head can be securely positioned, but the detachment process may irritate the puncture site
Solution Approach 1:
The device is divided into functionally independent segments: the holding means that secures the insertion head during preparation, and the drive means that propels the insertion head independently through the skin. The detachment occurs automatically after insertion, separating the holding function from the insertion function to avoid irritation.
Solution Approach 2:
The holding means temporarily secures the insertion head in a ready position before insertion, allowing proper positioning and preparation. The drive means is pre-loaded with energy (spring or gas pressure) to automatically propel the insertion head through the skin without requiring manual detachment that could irritate the puncture site.
2Speed
If spring force is used to abruptly place the infusion set on the application site, then insertion speed is increased, but the puncture site may be irritated by subsequent detachment
Solution Approach 1:
The harmful function of manual detachment is extracted from the system. The drive means automatically propels the insertion head through the skin and achieves automatic separation, eliminating the need for manual detachment that causes irritation while preserving the beneficial high-speed insertion.
Solution Approach 2:
The drive means with pre-loaded spring or gas pressure performs the insertion automatically without manual intervention. The system self-regulates the insertion process and automatic detachment occurs after penetration, making the device self-sufficient and eliminating irritation-causing manual operations.
3Loss of time
If automatic separation is implemented as soon as insertion occurs, then friction losses are reduced and pain phase is shortened, but the device becomes more complex to operate
Solution Approach 1:
The holding means and drive means are combined in a single integrated device. The holding means secures the insertion head during preparation, while the drive means automatically propels it through the skin. This unified design simplifies operation by eliminating the need for separate manual detachment steps, reducing both complexity and pain duration.
4Reliability
If multiple operating steps are required for insertion, then precise control is achieved, but the device becomes complicated to use
Solution Approach 1:
The holding means pre-positions the insertion head in a secure, ready state with all alignment and preparation steps completed beforehand. The drive means is pre-loaded with energy and automatically executes the insertion upon activation. This preliminary preparation maintains precise control while reducing operational complexity by eliminating intermediate manual steps.
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 solution provides a short insertion phase with minimal pain, prevents puncture site irritation, and simplifies the application process while being easier to handle than existing devices.
Implementation Method 1
holding means, e.g. two opposing leaf spring elements or spring shackles, with which the insertion head to be applied can be temporarily held
Implementation Method 2
drive means, with which the insertion head to be applied, when the insertion device is ready for application, can be moved from a first position
Data Source
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AI summary
The device has an infusion cannula (11) and/or a puncture point for piercing into a body of a patient. A housing is provided with a contact area (2) for fitting of the device on an application point at the body of the patient during application of an insertion head (12). A housing part (1a) is moved into a basic position after insertion of the insertion head into a retaining unit. The retaining unit separates the insertion head to start an insertion movement such that the device performs a larger part of the insertion movement lost by the retaining unit. Independent claims are also included for the following: (1) an arrangement comprising an insertion device (2) a method for applying an insertion head.