Adhesive-Free Dressing for Cylindrical Body Parts
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Solution Overview
Problem
Conventional transdermal drug delivery systems face challenges such as skin irritation, limited size due to adhesive issues, and incompatibility of drugs with adhesives, leading to inadequate delivery rates and skin irritation, especially for cylindrical body parts.
Innovation Solution
A flexible, adhesive-free dressing with a non-adherent lining and peripheral securement means that allows for easy application and removal, incorporating energy sources like iontophoretic, sonophoretic, or photophoretic driving energy to enhance drug delivery, and using liposomal or nano-encapsulations for improved flux and broader molecule delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is used to secure the transdermal patch to the skin, then the patch can be held in place for drug delivery, but skin irritation occurs and removal causes pain and re-injury
Solution Approach 1:
The patent removes the adhesive component entirely from the transdermal patch system. Instead of using adhesive to secure the patch, the invention employs a non-adhesive backing layer that secures the patch through mechanical means such as friction fit or snap-fit mechanisms, completely eliminating the source of skin irritation and painful removal
Solution Approach 2:
The patent introduces an intermediary securing mechanism between the patch and skin that does not involve direct adhesive contact. This intermediary mechanism (such as a removable adhesive strip on the periphery or a mechanical fastening system) allows the patch to be secured without the adhesive being in contact with the skin or wound area
2Productivity
If the transdermal patch size is increased to improve drug delivery rate, then more drug can be delivered, but adhesive-related skin irritation and compatibility issues worsen
Solution Approach 1:
By removing the adhesive component that limits patch size due to skin irritation concerns, the patent enables the development of larger transdermal patches that can deliver higher doses of medication without proportionally increasing skin irritation or compatibility problems
Solution Approach 2:
The patent changes the fundamental parameter of patch size by eliminating the adhesive constraint, allowing patches to be made larger to achieve sufficient drug delivery rates without relying on flux enhancers that cause additional skin irritation
3Productivity
If flux enhancers are added to small transdermal patches to achieve sufficient delivery rates, then drug delivery rate improves, but skin irritation is exacerbated
Solution Approach 1:
The patent eliminates the need for flux enhancers by removing the adhesive constraint that forced patches to be small. With larger patch areas achievable without adhesive, sufficient drug delivery rates can be obtained through increased surface area alone, avoiding the use of irritating flux enhancers
Solution Approach 2:
Instead of using chemical flux enhancers to partially compensate for small patch area, the patent employs excessive action by making the patch area itself sufficiently large to achieve the required drug delivery rate through passive diffusion alone
4Reliability
If adhesive is used on cylindrical body parts, then the patch can be secured, but application and removal become difficult and cause re-injury
Solution Approach 1:
The patent removes adhesive from the skin-contacting surface, replacing it with a non-adhesive backing that secures through mechanical means. This allows the patch to be applied and removed by simple mechanical actions (such as peeling off a peripheral adhesive strip or releasing a snap-fit) without the difficult pulling and tearing associated with adhesive removal from cylindrical surfaces
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
Enables secure, efficient, and hygienic drug delivery to cylindrical body parts with reduced skin irritation, increased delivery rates, and expanded compatibility with various molecules, allowing for larger surface area treatment without adhesive-related issues.
Implementation Method 1
incorporating energy sources like iontophoretic, sonophoretic, or photophoretic driving energy to enhance drug delivery
Implementation Method 2
incorporating energy sources like iontophoretic, sonophoretic, or photophoretic driving energy to enhance drug delivery
Implementation Method 3
incorporating energy sources like iontophoretic, sonophoretic, or photophoretic driving energy to enhance drug delivery
Implementation Method 4
using liposomal or nano-encapsulations for improved flux and broader molecule delivery
Implementation Method 5
using liposomal or nano-encapsulations for improved flux and broader molecule delivery
Data Source
AI summary
A dressing having a flexible sleeve shaped to accommodate a substantially cylindrical body portion, the sleeve having a lining which is substantially non-adherent to the body part being bandaged and having a peripheral securement means which attaches two peripheral portions to each other without those portions being circumferentially adhered to the sleeve portion.