Gas-Assisted Endoscopic Applicator with Pressure Venting
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Solution Overview
Problem
Existing endoscopic tissue adhesive applicators face challenges in mixing and applying fibrin and thrombin effectively, particularly in laparoscopic procedures, where pressure buildup in the abdominal cavity can occur due to gas introduction, leading to over-inflation and inefficient mixing of non-homogeneous liquids.
Innovation Solution
A gas-assisted endoscopic tissue adhesive applicator system that includes a regulator module to vent excess gas from the abdominal cavity, paired with a spray set comprising syringes and elongated tubes within a tubular sheath, ensuring thorough mixing and controlled application of fibrin and thrombin as an aerosol without increasing abdominal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas is introduced through the spray applicator to propel reactive liquids, then mixing and delivery of fibrin and thrombin is achieved, but abdominal cavity pressure increases causing over-inflation
Solution Approach 1:
The patent introduces a gas venting system that acts as an intermediary to manage the gas introduced for propelling the tissue adhesive. The venting mechanism allows excess gas to escape from the abdominal cavity, preventing pressure buildup while maintaining the gas flow needed for effective mixing and delivery of the reactive liquids through the spray applicator.
Solution Approach 2:
The system dynamically adjusts gas flow parameters by introducing gas at controlled rates and providing a venting pathway. This parameter control ensures that sufficient gas pressure is maintained for effective spray delivery and mixing, while excess pressure is relieved through the venting mechanism, resolving the contradiction between delivery efficiency and pressure management.
2Stability of the object's composition
If internal swirling mixing is used for thick or high viscous fluids, then mixing occurs within the applicator, but mixing is only marginal or partial
Solution Approach 1:
The patent employs gas flow dynamics to enhance mixing of high viscosity fluids. By introducing gas through the spray applicator, turbulent flow patterns are created that effectively mix thick or high viscous reactive liquids such as fibrin and thrombin, overcoming the limitations of internal swirling mechanisms for viscous materials.
3Reliability
If external combining applicators are used, then premature mixing is avoided, but thorough mixing of solutions does not occur
Solution Approach 1:
The gas flow mechanism serves dual purposes: it propels the externally combined solutions through the applicator (preventing premature mixing) and simultaneously creates turbulent mixing patterns at the point of application. This pneumatic approach resolves the contradiction by maintaining solution separation during delivery while achieving thorough mixing at the target site.
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 ensures efficient mixing and application of fibrin and thrombin while maintaining stable abdominal pressure, preventing over-inflation and ensuring thorough mixing of the adhesives, enhancing surgical precision and safety.
Implementation Method 1
expels two liquid components, at least one of which is reactive, from separate syringes while simultaneously releasing a pressurized fluid, such as a compressed gas, around, adjacent to or proximate the reactive components resulting in thorough mixing of the reactive components as well as propulsion thereof in a commingled stream
Implementation Method 2
releasing a pressurized fluid, such as a compressed gas, around, adjacent to or proximate the reactive components resulting in thorough mixing of the reactive components
Implementation Method 3
a regulator module to vent excess gas from the abdominal cavity, paired with a spray set comprising syringes and elongated tubes within a tubular sheath, ensuring thorough mixing and controlled application of fibrin and thrombin as an aerosol without increasing abdominal pressure
Data Source
AI summary
An apparatus for making and administering two non-homogenous liquids to target tissue includes a spray comprising two syringes for containing the first and second non-homogenous liquid where the syringes are adapted to be removably coupled to an applicator. The applicator includes a pair of elongated tubes each having a tubular sheath at a proximal end, a distal end and a lumen in which the pair of elongated tubes are disposed. The apparatus includes a regulator module having an inlet port adapted for connection to a source of gas under pressure and a gas outlet port adopted for connection to the gas inlet port of the sheet. A vent gas inlet port is adapted for connection to a vent port of an endoscopic cannula where the regulator vents a quantity of gas from the endoscopic cannula approximately equal to a quantity of gas introduced at the gas inlet port of the sheet.