Thumbtack Needle Dressing for Rapid, Stable Hemostasis
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Solution Overview
Problem
Existing hemostatic dressings suffer from limited hemostatic speed, easy detachment, patient discomfort, creation of airtight wounds, and secondary damage during removal, leading to ineffective hemostasis and increased infection risk.
Innovation Solution
A thumbtack needle dressing combining a patch layer, drug groove, and hollow thumbtack needle with a self-adhesive hemostatic drug layer, featuring a fixing strap and antimicrobial/anti-inflammatory drugs, providing physical and drug-induced hemostasis with improved stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional hemostatic dressings are used, then hemostasis can be achieved through pressure and absorption, but the hemostatic speed and effect are limited
Solution Approach 1:
The patent combines the thumbtack needle structure with hemostatic materials to create an integrated dressing system. The needle body provides mechanical penetration and anchoring while the hemostatic material layer provides pharmacological action, merging mechanical and chemical hemostasis mechanisms to achieve both rapid and reliable hemostasis
Solution Approach 2:
The dressing comprises multiple material layers including a thumbtack needle structure, hemostatic material layer, and patch layer. This composite structure integrates different material properties - the needle provides structural anchoring while the hemostatic material provides bleeding control, creating a synergistic effect that overcomes the limitations of single-material dressings
2Reliability
If conventional hemostatic dressings are applied, then hemostasis can be performed, but the dressings are easy to fall off or shift
Solution Approach 1:
The dressing is divided into distinct functional segments: the thumbtack needle portion for penetration and anchoring, the hemostatic material layer for bleeding control, and the patch layer for coverage. This segmentation allows each component to perform its specific function optimally while maintaining overall stability through the interconnected structure
Solution Approach 2:
The thumbtack needle is pre-positioned and anchored into the tissue before the hemostatic material is applied. This preliminary anchoring action ensures that the entire dressing assembly remains stable and cannot easily fall off or shift during the hemostasis process
3Reliability
If conventional dressings are used, then hemostasis can be achieved, but patient comfort is reduced due to tightness and stuffiness
Solution Approach 1:
The patch layer is designed as a thin, flexible film that conforms to the body surface while maintaining breathability. This thin-film structure provides the necessary coverage and protection without creating the tightness and stuffiness associated with conventional bulky dressings, thereby improving patient comfort while maintaining hemostatic effectiveness
4Reliability
If conventional hemostatic dressings are adhered to the wound, then hemostasis is achieved, but the wound healing is difficult due to airtight environment
Solution Approach 1:
The hemostatic material layer and patch layer are designed with porous structures that allow fluid permeation and gas exchange. This porous design maintains the hemostatic effect by providing contact pressure and drug delivery while simultaneously preventing the creation of a completely airtight environment, thereby reducing the risk of bacterial infection and promoting wound healing
5Productivity
If conventional dressings are removed and replaced, then fresh hemostatic material can be applied, but the wound is damaged due to tearing
Solution Approach 1:
The dressing incorporates a dynamic removal mechanism where the thumbtack needle can be safely extracted without causing wound damage. The needle is anchored in the tissue during use but can be removed through a controlled action that does not tear the wound edges, allowing for dressing replacement while preserving wound integrity
Solution Approach 2:
The thumbtack needle structure allows for the extraction of the dressing from the wound site through a controlled removal action. The needle's anchoring mechanism enables it to be pulled out without causing damage to the underlying tissue or wound edges, facilitating easy dressing replacement while protecting wound integrity
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
Achieves rapid, stable hemostasis with reduced infection risk and enhanced patient comfort, promoting wound healing and reducing secondary damage.
Implementation Method 1
the hemostatic drug layer is a self-adhesive layer provided with a hemostatic drug
Implementation Method 2
the hollow thumbtack needle includes a needle body and a needle tip, the needle body is communicated with the drug groove
Implementation Method 3
the patch layer is provided with a fixing strap to adjust and fit
Data Source
AI summary
A thumbtack needle dressing for hemostasis after an operation includes a dressing body and a hollow thumbtack needle. The dressing body includes a patch layer, a drug groove and a hemostatic drug layer connected in sequence. The hollow thumbtack needle includes a needle body and a needle tip, the needle body is communicated with the drug groove, the hollow thumbtack needle penetrates through the hemostatic drug layer to make the needle body and the needle tip expose from the hemostatic drug layer, and a needle cap is further provided on the needle tip. The drug groove is provided with a drug, and the hemostatic drug layer is a self-adhesive layer provided with a hemostatic drug. The patch layer is provided with a fixing strap to adjust and fit. The thumbtack needle dressing can achieve precise drug delivery and localized high-concentration medication.