Surgical Kit with Blunt Tip and Sharp Extraction Needle

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Solution Overview

Problem

Current methods for tissue transplantation, such as fat suction and extraction, face challenges including high absorption rates of transplanted fat, difficulty in extracting and implanting tissue of small dimensions, and complications like bleeding and tissue trauma due to sharp needles and scissors, leading to increased risks of rejection and necrosis.

Innovation Solution

A kit comprising a penetration rod with a blunt tip for creating cavities, an implantation tube for maintaining the cavity, and a container for housing material, along with an extraction tube with a razor or scalpel sharp entrance end for precise tissue extraction, minimizing tissue trauma and allowing for controlled implantation and extraction with only one small skin opening.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a sharp needle is used for tissue extraction and implantation, then tissue can be precisely extracted and implanted, but tissue trauma and bleeding increase leading to higher rejection and necrosis risks

Engineering Contradiction:

Improvetissue extraction precisionVSAvoidtissue trauma and bleeding

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The device employs different tip geometries for different functions: a sharp needle portion for precise tissue extraction and a blunt portion for trauma-free implantation. This local differentiation of quality allows the same device to achieve both precise extraction and minimal trauma during implantation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of using a sharp needle for both extraction and implantation, the invention inverts the approach by using a blunt portion for implantation. This reversal eliminates tissue trauma during the implantation phase while maintaining extraction precision through the sharp needle portion.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If fat is centrifuged and cleaned to achieve a concentrate, then the fat can be easily injected, but 60-100% of the injected fat is absorbed by the body within a year

Engineering Contradiction:

Improveinjection easeVSAvoidfat retention rate

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The device enables preliminary preparation of the implantation site by creating a precise cavity before fat insertion. This preliminary action ensures proper positioning and containment of the fat graft, contributing to higher retention rates while maintaining ease of injection.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention replaces the traditional centrifugation and cleaning mechanical process with a direct extraction and implantation system that preserves fat morphology. This substitution eliminates the need for centrifugation while achieving both ease of operation and improved fat retention.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If segmental or core fat with intact morphology is transplanted, then absorption is reduced to below 5%, but the difficulty in extracting tissue of suitably small dimensions increases

Engineering Contradiction:

Improvefat retention rateVSAvoidtissue extraction difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The device segments the fat extraction and implantation processes into distinct phases using separate needle portions. The sharp needle portion enables precise extraction of small dimensions, while the blunt portion facilitates easy implantation of the intact fat segment, resolving the contradiction between extraction difficulty and retention rate.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The hollow tube acts as an intermediary that receives the extracted fat segment and transports it to the implantation site. This intermediary structure allows precise extraction of small fat dimensions while preserving intact morphology, enabling both ease of operation and high retention rates.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Productivity

If a hollow scalpel and sharp needle are used in sequence for extraction and implantation, then tissue can be extracted and implanted, but two wounds are made in the skin increasing complexity and trauma

Engineering Contradiction:

Improveextraction and implantation efficiencyVSAvoidnumber of skin wounds

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The invention merges the extraction needle and implantation needle into a single integrated device with different tip portions. This allows both extraction and implantation to be performed through the same skin opening, reducing the number of wounds from two to one while maintaining procedural efficiency.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single needle device performs multiple functions: sharp needle portion for tissue extraction, blunt portion for trauma-free implantation, and hollow tube for fat transport. This multi-functionality eliminates the need for separate extraction and implantation instruments, reducing skin wounds while maintaining productivity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8939915B2Surgical kits and methods

Publication Date: 2015.01.27 RESITU MEDICAL AB

AI summary

A kit for implantation of material into a body, a kit for extraction of tissue from a body and a tissue transplantation kit. A method for implanting material into a body, a method for extracting tissue from a body and a method for transplanting tissue into a body.