Anti-Extravasation Sheath Fluid Management

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Extravasation of fluid during arthroscopic shoulder surgery leads to adverse effects such as tracheal compression, hemarthrosis, thrombophlebitis, compartment syndrome, and infection, prolonging recovery time and causing discomfort, due to the inability to effectively manage fluid flow and drainage in the surgical field.

Innovation Solution

The anti-extravasation inflow/outflow sheath, a multi-lumen tube with fluid ports and drainage apertures, allows for controlled fluid inflow and outflow, and drainage from surrounding tissues, reducing extravasation by facilitating fluid management during arthroscopic procedures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If fluid is introduced into the surgical site to expand the joint and control bleeding, then the surgical field is maintained and visibility is improved, but fluid extravasation into surrounding tissues occurs causing adverse effects

Engineering Contradiction:

Improvesurgical field visibilityVSAvoidfluid extravasation effects

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The sheath is divided into multiple lumens (inflow lumen, outflow lumen, drainage lumen) that are segmented and dedicated to specific fluid management functions. This segmentation allows independent control of fluid inflow, outflow, and drainage pathways, preventing uncontrolled extravasation while maintaining surgical field expansion

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The anti-extravasation sheath acts as an intermediary device between the irrigation fluid source and the surgical site. It mediates fluid flow by providing controlled pathways through its multi-lumen structure, filtering and directing fluid to prevent harmful extravasation into surrounding tissues while maintaining necessary surgical field pressure

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If traditional single-lumen sheaths are used for fluid management, then the device structure is simple, but fluid flow control and drainage capability are insufficient leading to extravasation

Engineering Contradiction:

Improvesheath structureVSAvoidfluid management effectiveness

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The multi-lumen sheath performs multiple functions within a single device: maintaining surgical field expansion, controlling fluid outflow, and draining extravasated fluid. This multi-functionality integrates what would otherwise require separate devices into one comprehensive solution

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If fluid extravasation is allowed to occur, then the surgical procedure can proceed without additional drainage devices, but patient complications increase and recovery time is prolonged

Engineering Contradiction:

Improvesurgical procedure simplicityVSAvoidrecovery time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The drainage lumen is pre-configured within the sheath to proactively prevent and drain fluid extravasation before it accumulates to harmful levels. This preliminary drainage action prevents complications such as compartment syndrome and hemarthrosis, avoiding the need for additional drainage devices and reducing recovery time

Inventive Principle:

Principle #10Preliminary action

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

This solution maintains a clear surgical field, reduces fluid extravasation, and eliminates the need for a third irrigation instrument, thereby minimizing complications and shortening recovery time.

Implementation Method 1

The body or central portion of the sheath is provided with a plurality of drainage apertures. Each drainage aperture communicates with one or more of the drainage lumens inside the tube, thereby allowing fluid to drain from the tissue surrounding the surgical site

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Implementation Method 2

During surgery, fluid is introduced into the surgical site of field to expand the joint and control bleeding

Methodology Applied

Scientific EffectFluid pressure: Pressure Increase

Data Source

PatentUS9186055B2Anti-extravasation sheath

Publication Date: 2015.11.17 CANNUFLOW INC

AI summary

The devices shown provide for the minimization of extravazation during arthroscopic surgery. The anti-extravazation sheath having a plurality of drainage apertures disposed in a central portion of the outer tube allows a surgeon to drain excess fluids from the tissue surrounding the surgical field during an arthroscopic surgical procedures when the drainage apertures are disposed within the tissue surrounding an arthroscopic surgical field outside of the joint capsule.