Chest Seal Venting Channels to Prevent Blood Clot Blockage
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Solution Overview
Problem
Current chest seals used in prehospital settings for treating traumatic pneumothorax are susceptible to air flow blockage due to blood clots, which can lead to tension pneumothorax and respiratory failure, and lack effective fluid separation mechanisms.
Innovation Solution
The chest seal design incorporates one or more main channels and secondary channels to separate fluids, such as blood and air, without mechanically actuated components, ensuring indirect fluid communication to prevent blockage and enhance drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a one-way valve vented seal is used to allow air and fluid drainage, then air can be vented from the chest cavity, but blood clots can block the air flow path
Solution Approach 1:
The chest seal divides the drainage pathway into separate channels: a first channel for air venting and a second channel for blood drainage. This segmentation prevents blood clots from blocking the air venting path, as each fluid type has its own dedicated channel. The seal body includes multiple discrete channels that are spatially separated, allowing independent flow paths for air and blood.
Solution Approach 2:
The seal body acts as an intermediary structure that mediates between the chest wound and the external environment. It provides a controlled interface with multiple channels that selectively allow different fluids to pass through separate pathways, preventing direct contact between blood and the air venting mechanism.
2Ease of operation
If occlusive dressing is used to seal the chest wound, then respiratory mechanics are initially restored, but tension pneumothorax develops due to air accumulation
Solution Approach 1:
The chest seal transitions from a static occlusive barrier to a dynamic system with controlled venting. The one-way valve mechanism allows the seal to adapt its permeability based on pressure differentials, automatically venting air when pressure builds up while maintaining seal integrity during normal respiration. This dynamic response prevents tension pneumothorax without requiring manual intervention.
Solution Approach 2:
The seal changes its effective permeability parameter based on internal pressure conditions. When intrathoracic pressure increases due to air accumulation, the pressure differential opens the one-way valve, changing the seal from closed to partially open state. This parameter change allows passive venting while maintaining overall seal function.
3Reliability
If currently available one-way valve vented seals are used, then air can be vented effectively, but manufacturing complexity increases due to mechanically actuated components
Solution Approach 1:
The patent replaces complex mechanically actuated valve systems with a simpler pressure-differential driven one-way valve. Instead of using motors, sensors, or electronic controls, the valve operates passively based on natural pressure gradients between the chest cavity and external environment. This substitution maintains venting effectiveness while dramatically reducing mechanical complexity.
Solution Approach 2:
The chest seal system is self-regulating and requires no external power or control mechanisms. The one-way valve automatically opens and closes based on pressure differentials generated by respiratory mechanics and blood pressure. The system serves itself by using the body's own pressure variations to control the venting function, eliminating the need for external mechanical actuation systems.
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 design effectively separates and drains fluids, reducing the risk of blockage and improving respiratory function by preventing air accumulation, thus effectively treating pneumothorax.
Implementation Method 1
The at least one main channel is in fluid communication with the hub port, and the at least one main channel includes a main channel inlet at the hub port and a main channel outlet at a perimeter of the seal body. The first secondary channel includes a first secondary channel inlet at the at least one main channel and a first secondary channel outlet at the perimeter of the seal body.
Data Source
AI summary
A chest seal includes a seal body, a hub port at the seal body, at least one main channel at the seal body, and a first secondary channel at the seal body. The hub port extends from a first seal body side toward a second seal body side. The at least one main channel is in fluid communication with the hub port, and the at least one main channel includes a main channel inlet at the hub port and a main channel outlet at a perimeter of the seal body. The first secondary channel includes a first secondary channel inlet at the at least one main channel and a first secondary channel outlet at the perimeter of the seal body. The first secondary channel outlet is spaced apart about the perimeter of the seal body from the main channel outlet.