Surgical Drape Young's Modulus Peeling Prevention
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Solution Overview
Problem
Conventional surgical drapes tend to peel off from uneven or curved surfaces during surgery, such as hands, legs, or heads, leading to safety issues due to the entry of blood and other fluids into the incision site.
Innovation Solution
A surgical drape with a tacky layer having a Young's modulus of 0.1 to 5.0 MPa or less and a piercing strength of 4.0 N or less, combined with a flexible film-like base material, is designed to prevent peeling by maintaining contact with the skin even on low-smoothness or high-curvature surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional surgical drape with higher Young's modulus is used, then the drape has sufficient structural strength and piercing resistance, but it peels off from uneven or curved skin surfaces during surgery
Solution Approach 1:
The patent applies parameter changes by reducing the Young's modulus of the drape material to 0.1-5.0 MPa, transforming it from a rigid structure to a flexible one that can conform to uneven skin surfaces. This parameter change allows the drape to maintain both adequate strength (≥2.0 N piercing strength) and reliable adherence to curved surfaces like hands, legs, and heads during surgical procedures
2Ease of operation
If a rigid drape material is used, then the drape maintains its shape and provides good handling properties, but it cannot maintain contact with high-curvature surfaces such as hands, legs, or heads
Solution Approach 1:
The patent employs flexible shells and thin films by using a drape material with Young's modulus of 0.1-5.0 MPa, which is sufficiently flexible to conform to high-curvature anatomical surfaces while maintaining adequate mechanical strength. This flexibility enables the drape to adapt to various body parts including hands, legs, and heads, solving the adaptability problem
3Reliability
If the drape peels off from the skin during incision, then the surgical field is exposed to blood and fluids, but increasing the drape's rigidity causes peeling on uneven surfaces
Solution Approach 1:
The patent resolves this contradiction through parameter changes by optimizing the Young's modulus to a specific range (0.1-5.0 MPa) that balances flexibility and strength. This optimized parameter range prevents peeling on uneven surfaces while maintaining adequate piercing strength (≥2.0 N), thereby ensuring reliable prevention of blood and fluid entry into the surgical field
Data Source
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Figure 3
AI summary
The present invention provides a surgical drape such that even when it is incised or punctured with a surgical tool in a state where it is pasted to an uneven surface having a low smoothness or to a part having a high curvature, such as a hand, a leg, or the head, a part subjected to incision or the like and its surroundings are unlikely to peel off, the surgical drape having excellent handling properties and safety. The surgical drape is a surgical drape 10 provided with a tacky layer 5 to be incised or punctured with a surgical tool, the tacky layer 5 having a tacky surface 2 to be brought into contact with a region including a surgery site of a living body. The surgical drape 10 has a Young's modulus of 10.0 MPa or less and may further be provided with a film-like base material 15 disposed by lamination on a surface on an opposite side of the tacky surface 2 of the tacky layer 5.