Skin Stapler Handle Assembly Using Paper Pulp and Retainer Ears
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Solution Overview
Problem
Existing disposable skin staplers are made from petroleum-based plastics, leading to biohazard waste and environmental pollution, as they require incineration after a single use, and lack sustainable recycling options.
Innovation Solution
The use of wood pulp products and an integrated sheathing system to protect stapler components from contamination, allowing for clean bin recycling of handle assemblies and separate biohazard disposal of staple mechanisms, reducing the volume of waste destined for incineration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If petroleum-based plastics are used to make disposable skin staplers, then the staplers can be manufactured inexpensively and disposed of after single use, but they create biohazard waste requiring incineration and cause environmental pollution
Solution Approach 1:
The stapler is divided into two separate components: a reusable handle assembly and a disposable staple cartridge. The handle assembly contains all mechanical components (trigger mechanism, anvil, magazine) and is sterilized and reused, while only the staple cartridge is disposed of after single use. This segmentation eliminates the need to incinerate the entire stapler, reducing biohazard waste volume significantly.
Solution Approach 2:
The reusable handle assembly is recovered after use through sterilization processes and returned to service, while only the contaminated staple cartridge is discarded. This allows the majority of the stapler (the handle assembly) to be recovered and reused multiple times, minimizing waste generation.
2Object-affected harmful factors
If entire staplers are incinerated after single use, then biohazard contamination is eliminated, but pollution increases and material consumption rises
Solution Approach 1:
By separating the stapler into reusable and disposable components, only the small staple cartridge needs to be incinerated or disposed of as biohazard waste, while the larger handle assembly is sterilized and reused. This dramatically reduces the volume of material subjected to incineration and associated pollution.
Solution Approach 2:
The handle assembly is recovered through sterilization and reused across multiple procedures, eliminating the need for repeated manufacturing and disposal cycles. Only the staple cartridge is discarded, minimizing the frequency and volume of waste disposal operations.
3Strength
If hard plastics are used to achieve necessary material strength in stapler components, then structural integrity is maintained, but recyclability is reduced
Solution Approach 1:
The handle assembly is designed for recovery and reuse rather than recycling. Its structural components are built to withstand repeated sterilization cycles and mechanical use, extending service life through multiple procedures. This eliminates the need for recycling while maintaining strength requirements.
Data Source
AI summary
A surgical stapler includes a handle assembly 80 made of paper pulp products or other eco-friendly material. The handle assembly and components of the staple mechanism housing are designed to accommodate the decreased material strength of the handle assembly. Handle retainer ears 110 are attached to the staple mechanism housing and prevent flexing of the lever grip. The retainer ears in combination with a raised circular boss 16 of the handle assembly facilities the use of lower strength materials, such as paper pulp products. An efficient staple housing mechanism includes a new return spring 120, a visual guide rod or alignment indicator 150 and a flattened stapler guide 130. An improved lever grip includes concentrically trimmed arc in the lever grip sidewalls 117. An improved lever grip includes an extended arched rear section 113 to comport with a new positive mating area 115 of the handle.