Catheter Light Irradiation Tip Geometry to Prevent Blood Coagulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light irradiation systems used in conjunction with catheters, such as those for PDT and NIR-PIT, inadvertently irradiate body fluids within the catheter, leading to blood coagulation and damage to normal cells, and this issue is not adequately addressed in existing devices.
Innovation Solution
A light irradiation system design featuring a catheter with a through-hole and a light irradiation device having a large diameter portion that pushes body fluids out of the catheter lumen, preventing irradiation of these fluids and minimizing tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light irradiation is performed using a catheter and light irradiation device, then cancer treatment effectiveness is improved, but body fluids within the catheter are inadvertently irradiated causing blood coagulation and tissue damage
Solution Approach 1:
The patent extracts the harmful body fluids from the light irradiation path by using a large diameter portion to push fluids out of the catheter lumen before irradiation, separating the fluids from the treatment zone to prevent unwanted irradiation effects
Solution Approach 2:
The large diameter portion performs a preliminary action by pushing body fluids out of the catheter lumen before the light irradiation device begins treatment, ensuring fluids are removed in advance to prevent harmful irradiation effects during cancer treatment
2Length of stationary object
If the light irradiation device is inserted into the catheter, then deep tissue irradiation is enabled, but body fluids infiltrating the catheter lumen are exposed to light irradiation
Solution Approach 1:
The large diameter portion extracts body fluids from the catheter lumen by pushing them outward, removing the harmful element (fluids) from the irradiation path while maintaining deep tissue irradiation capability
Solution Approach 2:
The patent addresses the fluid irradiation problem not by changing the light path dimension, but by acting in the radial dimension - using the large diameter portion to push fluids radially outward from the lumen, separating them from the axial light irradiation path
3Ease of operation
If a small diameter light irradiation device is used, then insertion is easier, but body fluids are more likely to contact the irradiation portion
Solution Approach 1:
The light irradiation device is segmented into two functional portions: a distal light irradiation portion for treatment and a proximal large diameter portion for fluid displacement, allowing each segment to perform its specific function effectively
Solution Approach 2:
The large diameter portion acts as an intermediary mechanism between the insertion force and the body fluids, using its larger size to generate sufficient push force to displace fluids from the lumen without directly contacting or irritating the fluids
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 system effectively suppresses light irradiation of body fluids, reducing coagulation and tissue damage by ensuring the light irradiation device is positioned to avoid irradiating body fluids, while allowing smooth insertion and alignment with the catheter.
Implementation Method 1
a light irradiation portion that outputs irradiation light to the outside
Implementation Method 2
a large diameter portion that is distal to the light irradiation portion and has an outer diameter larger than an outer diameter of the light irradiation portion... configured to push out body fluid infiltrating a lumen of the catheter
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A light irradiation having an elongated shape and being inserted into a catheter for use, includes a light irradiation portion being provided on a distal end side of a light irradiation device and outputting irradiation light to an outside, and a large diameter portion being distal to the light irradiation portion and having an outer diameter larger than an outer diameter of the light irradiation portion.