Eccentric Fluid Injection Pipe With Fixed Joint
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Solution Overview
Problem
Existing fluid injection devices face challenges in effectively removing larger excised tissues due to limited suction channel size in concentric designs, and in eccentric designs, vibration issues lead to inaccurate fluid injection and noise production.
Innovation Solution
A fluid injection device with an eccentrically inserted injection pipe and a suction pipe, where the injection pipe is fixed to the suction pipe near the injection opening, increasing suction channel size and reducing vibration, along with a mark on the suction pipe to indicate the injection opening for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the injection pipe is inserted concentrically into the suction pipe, then the structure is simple and easy to manufacture, but the suction channel size becomes too small to remove larger excised tissues
Solution Approach 1:
The injection pipe is inserted eccentrically (non-concentrically) into the suction pipe, creating an asymmetric structure where the injection pipe is positioned closer to one side of the suction pipe inner wall. This asymmetric arrangement increases the suction channel size on the opposite side, enabling removal of larger excised tissues while maintaining manufacturing simplicity
2Area of stationary object
If the injection pipe is inserted eccentrically into the suction pipe, then the suction channel size increases allowing removal of larger tissues, but vibration is generated at the injection opening causing inaccurate fluid injection
Solution Approach 1:
The injection pipe is fixed to the suction pipe at a position away from the injection opening (proximal end), performing a preliminary stabilizing action before the injection process begins. This preliminary fixation prevents vibration generation during high-pressure fluid injection, ensuring accurate fluid delivery to the target surgery portion while maintaining the eccentric configuration for large tissue removal
3Area of stationary object
If the injection pipe is inserted eccentrically into the suction pipe, then the suction channel size increases, but the position of the injection opening cannot be directly recognized by visual check
Solution Approach 1:
A mark (such as a colored indicator, notch, or contrasting feature) is provided on the suction pipe to indicate the position of the injection opening. This visual marking allows surgical staff to easily recognize and locate the injection opening position during procedures, overcoming the difficulty of detecting the eccentric injection opening position without affecting the eccentric structure for large tissue removal
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 larger tissue removal with improved surgical vision and accurate fluid injection by increasing suction channel size and minimizing vibration-induced noise and misalignment.
Implementation Method 1
a suction pipe (80) projecting from the pulse generator (20)... capable of removing liquid or excised tissues by suction
Implementation Method 2
a pulse generator (20) which converts fluid into pulse flow... sharply changes the volume of a fluid chamber by using a volume varying unit to convert fluid into pulse flow and inject the pulse flow through an injection opening as pulses at high speed
Data Source
AI summary
A fluid injection device includes: a pulse generator which converts fluid into pulse flow; a suction pipe projecting from the pulse generator; an injection pipe which is eccentrically inserted into the suction pipe such that the outer circumferential surface of the injection pipe contacts the inner circumferential surface of the suction pipe, and has an injection opening communicating with the pulse generator; and a suction channel and a suction opening formed between the inner circumferential surface of the suction pipe and the outer circumferential surface of the injection pipe, wherein the injection pipe is fixed to the inner circumferential surface of the suction pipe in the vicinity of the injection opening.