Balloon Guide Catheter Positive Venting Residual Air
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Solution Overview
Problem
Conventional balloon guide catheters require arduous prepping steps to purge residual air, which can lead to human error and potential harm if not done correctly, deterring physicians from using them due to the complexity and time inefficiency.
Innovation Solution
A balloon guide catheter with positive venting that includes a semi-encircling inflation lumen and microporous membrane exhaust vents, allowing residual air to be purged by inflation medium without the need for vacuum, ensuring complete air expulsion before balloon inflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multi-step vacuum purging process is used to remove residual air, then complete air expulsion can be achieved, but the prepping process becomes complex and time-consuming
Solution Approach 1:
The inflation lumen is segmented into multiple sections with different functions: a first section with a microporous membrane for air venting, and a second section for balloon inflation. This segmentation allows residual air to be purged through the microporous membrane while the inflation medium is retained in the second section, eliminating the need for complex vacuum purging steps.
Solution Approach 2:
The air venting function is extracted from the main inflation lumen by creating a separate vent path through the microporous membrane. This allows residual air to be removed independently from the inflation medium, simplifying the prepping process while ensuring complete air expulsion.
2Object-generated harmful factors
If conventional vacuum purging is used to remove residual air, then air can be expelled from the catheter, but the process requires multiple repetitive steps increasing time consumption
Solution Approach 1:
The microporous membrane is pre-installed in the inflation lumen to provide automatic air venting capability. When inflation medium is introduced, it automatically purges residual air through the membrane without requiring repetitive vacuum steps, significantly reducing prepping time while ensuring complete air removal.
3Object-generated harmful factors
If vacuum or negative pressure is applied to purge residual air, then air can be removed from the inflating lumen, but the process requires additional equipment and steps
Solution Approach 1:
The microporous membrane enables the inflation lumen to self-purge residual air automatically when inflation medium is introduced. The membrane's selective permeability allows air to escape while retaining the inflation medium, eliminating the need for external vacuum equipment or complex purging procedures.
4Device complexity
If residual air is not completely purged from the catheter, then the prepping process can be simplified, but air may be exhausted into the blood vessel causing harm to the patient
Solution Approach 1:
The microporous membrane is strategically positioned in the inflation lumen to provide localized air venting functionality. The membrane's specific pore structure allows complete air expulsion while preventing inflation medium leakage, ensuring patient safety without requiring complex prepping 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
Simplifies the prepping process, reduces the risk of residual air entering the body, and enhances procedural efficiency by eliminating the need for negative pressure, while maintaining the benefits of balloon guide catheters.
Implementation Method 1
a microporous membrane at the distal end of the catheter shaft, the microporous membrane permitting passage of air trapped within the inflating lumen, but preventing passage of liquid through the membrane
Data Source
Figure 1A
Figure 1B~1C
Figure 1D
AI summary
A balloon guide catheter including a catheter shaft having a main lumen defined therein extending axially therethrough to receive a guidewire therein and an inflation lumen defined axially therein arranged semi-encircling the main lumen. The inflation lumen having an inlet port radially outward from the catheter shaft and an exhaust vent(s) disposed proximate the distal end of the catheter shaft. The exhaust vent(s) being disposed longitudinally through a distal terminating end of the inflation lumen or radially inward in fluid communication with the main lumen. A porous membrane is disposed at the exhaust vent(s) to permit only gas to pass therethrough. Secured about the outer surface proximate the distal end of the catheter shaft and coinciding with the inlet port is a balloon.