Hemostatic Microfiber Mat Prevents Platelet Wicking
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Solution Overview
Problem
Existing hemostatic methods, such as those using zeolites or polysaccharide particles, face issues like pain during removal, risk of embolisms, allergic reactions, and reduced effectiveness due to particle shedding into blood vessels, along with manufacturing complexity and cost, while current fibrous media have large pores that reduce hemostatic efficiency.
Innovation Solution
A biocompatible wound dressing made of hydrophilic microfibers with small pore sizes, arranged to prevent platelet wicking and secured to prevent shedding, manufactured from a single polymer material for ease of use and cost-effectiveness, with optional embedding of hemostatic agents for enhanced clotting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zeolite particles are used to accelerate blood clotting, then bleeding is stopped effectively, but the particles can become entrained in blood vessels causing embolisms and require painful removal
Solution Approach 1:
The patent employs a porous matrix material that provides a structured framework to hold hemostatic agents while preventing particle shedding into blood vessels. The porous structure allows blood contact for clotting acceleration but confines particles within the matrix, eliminating embolism risk and removing the need for painful particle removal.
Solution Approach 2:
The invention creates a composite structure combining a porous matrix material with embedded hemostatic particles. This composite approach integrates the hemostatic effectiveness of particles like zeolites or polysaccharides with the safety benefits of a confining matrix structure, achieving both clotting acceleration and particle containment.
2Reliability
If loose particles are applied to the wound, then clotting is accelerated, but the particles are difficult to apply and can be washed away by flowing blood
Solution Approach 1:
The patent integrates hemostatic particles within a porous matrix structure to create a composite dressing. This integration ensures particles remain in position during application and blood flow, eliminating the washing away problem while maintaining clotting acceleration effectiveness.
Solution Approach 2:
The porous matrix provides a stable structure that holds hemostatic particles in fixed positions, allowing reliable application to wounds. The porous structure permits blood contact for clotting while preventing particle displacement by flowing blood.
3Ease of operation
If particles are embedded in a wound dressing, then application is easier, but the dressing complexity and manufacturing cost increase
Solution Approach 1:
The patent utilizes a porous matrix material that can be manufactured as a single integrated structure with embedded hemostatic particles. This approach simplifies the dressing design compared to multi-layer constructions, reducing manufacturing complexity while maintaining ease of application.
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 dressing effectively accelerates blood clotting, reduces the risk of clot-promoting particles entering the bloodstream, is easy to apply, and is cost-effective to manufacture, with improved hemostatic properties and biocompatibility.
Implementation Method 1
The pore size of such particles should be such that water is able to be readily adsorbed by the particles
Implementation Method 2
the porous particles absorb the water from blood allowing the natural fibrinogens within the blood to coagulate
Implementation Method 3
the pore size sufficiently small to inhibit wicking platelets from a wound into the pores
Data Source
AI summary
A wound dressing and a method for enhancing the clotting comprising a plurality of hydrophilic microfibers bonded to each other to form a mat with the plurality of microfibers having a pore size sufficiently small to inhibit wicking platelets from a wound into the microfibers so that when applied to a wound the blood coagulates and the microfibers remain external to the wound.