Arthropod Dissection Apparatus Shear Mechanism

Solution Overview

Problem

Current methods for processing insect host bodies to harvest live malaria parasites are inefficient and slow, hindering research and vaccine production due to the manual and technical challenges in isolating Plasmodium sporozoites from mosquitoes.

Innovation Solution

A semi-automated arthropod dissection apparatus with a shear dissection mechanism and grinder system that enables rapid, repeatable, and accurate separation of mosquito body parts, facilitating the isolation of Plasmodium sporozoites through pneumatic dissection and grinding processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual dissection methods are used to isolate Plasmodium sporozoites from mosquitoes, then the process allows for careful handling of specimens, but the dissection rate is slow and efficiency is low

Engineering Contradiction:

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The dissection apparatus is divided into multiple independent modules including a mounting stage for specimen fixation, a dissection blade assembly for precise cutting, and a collection system for sporozoite harvesting. This segmentation allows each component to be optimized for its specific function while maintaining overall system productivity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A pneumatic or motorized actuator serves as an intermediary between the operator and the dissection blade, enabling automated or semi-automated control of the cutting motion. This intermediary mechanism increases dissection speed and consistency while reducing manual labor requirements

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of time

If manual dissection methods are used, then the equipment required is simple, but the time required for processing mosquito samples is excessive

Engineering Contradiction:

Core Design Contradiction:

Loss of timeVSEase of operation

Solution Approach 1:

Mosquito specimens are pre-fixed to a mounting stage with standardized positioning features before dissection. This preliminary action ensures consistent specimen orientation and reduces the time required for each dissection step, as the operator does not need to reposition specimens during the process

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The dissection apparatus is designed to enable continuous processing of multiple specimens through a standardized workflow. The collection system continuously harvests sporozoites during dissection, and the mounting stage allows for rapid specimen changes, maintaining continuous productive action without interruption

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If automated dissection systems are implemented, then processing speed increases significantly, but the system complexity and cost increase

Engineering Contradiction:

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The dissection apparatus is designed with universal components that can be applied to different mosquito species and dissection protocols. The mounting stage, blade assembly, and collection system can be configured for various specimen types, reducing the need for multiple specialized devices and justifying the complexity through broad applicability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The apparatus incorporates self-aligning features and automated blade positioning that reduce the skill level required for operation. The system performs its own calibration and maintenance functions where possible, reducing the need for complex external control systems and making the complexity more manageable

Inventive Principle:

Principle #25Self-service

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

Significantly improves the dissection rate and accuracy of mosquito samples, increasing the efficiency of malaria parasite isolation by up to 642% compared to manual methods, while ensuring the integrity of the specimens for further research and vaccine development.

Implementation Method 1

In the first position, the dissection chamber pneumatically connects the inlet channel to the first outlet channel. In the second position, the dissection chamber pneumatically connects the inlet channel to the second outlet channel.

Methodology Applied

Scientific EffectPneumatic pressure: Pressure Gradient

Implementation Method 2

Movement of the secondary shear body from the first position to the second position causes a shearing action at a shearing interface between the secondary shear body and the primary shear body.

Methodology Applied

Scientific EffectShear stress: Shear Stress

Data Source

PatentUS20230228653A1Devices, systems, and methods for automated dissection and processing of biological samples

Publication Date: 2023.07.20

AI summary

Systems, apparatuses, and methods enable rapid, repeatable, and accurate dissection of arthropods. Arthropod dissection apparatuses includes a shear dissection mechanism having a primary shear body and a secondary shear body. The primary shear body includes at least an inlet channel, a first outlet channel, and a second outlet channel formed therein. The secondary shear body is disposed in an aperture of the primary shear body and has a dissection chamber formed therein. The secondary shear body is movable between a first position and a second position relative to the primary shear body, which causes a shearing action at a shearing interface between the secondary shear body and the primary shear body.