Hydrocolloid Dressing for Nipple Positioning After Mastectomy

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Solution Overview

Problem

Nipple malposition and necrotic complications are common issues following nipple-sparing mastectomies (NSM) and skin-sparing mastectomies (SSM), with existing methods like acellular dermal matrix (ADM) use leading to increased risks of complications such as nipple or skin necrosis and poor aesthetic outcomes.

Innovation Solution

A hydrocolloid dressing is used to position and elevate the nipple-areolar complex post-NSM/SSM, eliminating the need for ADM and intraoperative fill, by creating a wound healing environment that allows precise nipple placement and tissue perfusion, with adjustable designs to ensure optimal positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If acellular dermal matrix (ADM) is used to augment reconstruction, then proper skin envelope fill and nipple position are improved, but risks of complications such as nipple or skin necrosis increase

Engineering Contradiction:

Improvenipple positionVSAvoidnecrotic complications

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent removes ADM from the reconstruction process entirely, using only hydrocolloid dressing to achieve nipple positioning and skin envelope support, thereby eliminating ADM-related necrotic complications while maintaining positioning accuracy

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces expensive ADM with a simple, inexpensive hydrocolloid dressing that can be easily applied and removed, achieving similar positioning benefits without the complications associated with ADM

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Manufacturing precision

If high initial fill volume is used in tissue expanders, then nipple positioning is improved, but tissue stress and necrotic complications increase

Engineering Contradiction:

Improvenipple positioningVSAvoidtissue stress

Core Design Contradiction:

Manufacturing precisionVSStress or pressure

Solution Approach 1:

The hydrocolloid dressing is applied immediately after surgery to establish proper nipple positioning before tissue expansion begins, preventing the need for high initial fill volumes that would cause tissue stress and necrosis

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The hydrocolloid dressing acts as an intermediary support structure that maintains nipple positioning without requiring high tissue expander fill volumes, thereby reducing tissue stress and preventing necrotic complications

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If single stage reconstruction is performed, then operative time is reduced, but mastectomy flap tension and necrotic complications increase

Engineering Contradiction:

Improveoperative timeVSAvoidnecrotic complications

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent separates the positioning function (achieved immediately with hydrocolloid dressing) from the reconstruction function (performed during surgery), allowing single stage reconstruction without the tension and necrosis risks associated with attempting both simultaneously

Inventive Principle:

Principle #1Segmentation

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 hydrocolloid dressing significantly reduces nipple malposition and necrotic complications, achieving 97% correct nipple positioning and 70% reduction in necrotic complications, while minimizing tissue stress and operative time, resulting in improved aesthetic outcomes and reduced costs.

Implementation Method 1

Hydrocolloid dressings are commonly used to treat wounds and promote healing by providing a moist environment and absorbing exudate

Methodology Applied

Scientific EffectHydrocolloid absorption: Absorption (physical)

Implementation Method 2

The dressing is secured over the patient's breast, specifically with the dressing's main body disposed over the breast mound

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS10322034B1Hydrocolloid dressing for precise nipple positioning after nipple- or skin-sparing mastectomy

Publication Date: 2019.06.18 UNIV OF SOUTH FLORIDA

AI summary

An apparatus and method/technique that uses a hydrocolloid dressing that results in both improved circulation and aesthetic success with optimal nipple positioning. By applying a specific pattern of the adhesive hydrocolloid dressing to the mastectomy flaps, stability of the nipple-areolar complex (NAC) in the desired higher position could be achieved. In operation, the hydrocolloid dressing is placed over the breast after surgery (while also leaving the incision site uncovered), and remains in place for a suitable amount of time. The hydrocolloid dressing can be applied on either side or both sides of the nipple during expansion phase to precisely control nipple position. Different designs of the hydrocolloid dressing are contemplated herein.