Heart Failure Injection Catheter With Adjustable Single-Dose Control
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Solution Overview
Problem
Existing heart failure treatment devices face challenges such as inconsistent dosing due to fixed injection module lengths, residual medication affecting subsequent doses, and limited single-use operations, leading to suboptimal therapeutic outcomes and inefficiencies.
Innovation Solution
A drug injection device with a reservoir tube and movable components allowing adjustable extension length, enabling precise dose control and temporary storage of medication for repeated injections, along with mechanisms for venting residual medication and preventing over-injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed-length injection module is used, then the device structure is simple, but accurate dose control cannot be achieved
Solution Approach 1:
The injection module employs a movable tube that can slide relative to the injection needle, transforming the fixed structure into a dynamic one. This allows the effective injection length to be adjusted by moving the tube to different positions, thereby controlling the medication dose delivered while maintaining a relatively simple overall device structure
Solution Approach 2:
The injection module is divided into separable components including the injection needle, movable tube, and reservoir tube. The movable tube acts as an independent segment that can be positioned at different locations along the injection needle, enabling flexible dose control through component arrangement rather than requiring a completely complex integrated structure
2Loss of substance
If the injection module performs a single injection, then the structure is simple, but medication waste occurs due to residual volume
Solution Approach 1:
The movable tube can be detached from the injection needle after use, separating the used injection components from the reservoir tube that still contains medication. This allows the reservoir tube to be reused for subsequent injections while the injection needle and tube are discarded, thereby recovering and reusing the majority of the medication supply and minimizing waste
Solution Approach 2:
The injection system is segmented into reusable and disposable parts. The reservoir tube containing the medication supply is designed to be reusable, while the injection needle assembly is designed as a disposable component. This segmentation allows the expensive medication-containing portion to be recovered and reused, reducing overall medication waste
3Manufacturing precision
If quantitative injection relies on physician experience, then the device is easy to operate, but dosing variations occur
Solution Approach 1:
The movable tube can be positioned at different fixed locations along the injection needle, with each position corresponding to a specific dose. This dynamic positioning system provides pre-determined dosing options that reduce reliance on physician estimation while maintaining straightforward operation through simple tube repositioning
Solution Approach 2:
The device enables precise control of the injection parameter (dose volume) by changing the physical position of the movable tube. Different tube positions correspond to different effective injection lengths and thus different medication volumes, providing accurate dosing control without requiring complex operational procedures
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 accurate dose control and efficient multiple injections with reduced residual medication impact, improving therapeutic outcomes and injection efficiency.
Implementation Method 1
a first check valve is mounted on the administration tube
Implementation Method 2
an outer side of the connecting tube is fixedly connected to a second check valve
Implementation Method 3
multiple clamping blocks are fixedly connected around an inner wall of the reservoir tube close to the sealing plate, multiple clamping slots matched with the clamping blocks are formed around a side of the injection piston towards the sealing plate
Data Source
AI summary
The present invention discloses a drug injection device for heart failure, and key technical solutions thereof are as follows: The device includes a delivery catheter and an abutting component disposed at one end of the delivery catheter. Multiple guide holes are formed in the abutting component. A reservoir tube is slidably connected in the delivery catheter. Multiple injection needles in communication with the reservoir tube are disposed at one end of the reservoir tube close to the abutting component. The multiple injection needles are slidably inserted in the multiple guide holes respectively in one-to-one correspondence. A sealing plate is rotatably connected in an inner wall of one end of the reservoir tube close to the injection needle. The present invention has the following technical effects: By providing the reservoir tube, the present invention enables adjustment of the movable tube's extension length from the injection tube during operation. This controls the distance between the injection piston and the sealing plate, where a space volume between the injection piston and the sealing plate is a total dosage of the single-dose medication. In this way, accurate dose control is achieved for each injection.