Antibody Fixing on Medical Instrument Surfaces
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Solution Overview
Problem
Existing methods for fixing antibodies on medical instrument surfaces either fail to firmly attach the antibodies or reduce their activity, posing challenges for biochip applications and medical diagnostics.
Innovation Solution
A method involving pre-treatment, hole preparation, post-treatment, and antibody fixation using chemical corrosion to create a multicrystal phase structure with uniform holes, allowing for physical adsorption and maintaining antibody activity, including steps like ultrasonic washing, acid solution corrosion, and pH-adjusted buffer solutions for effective antibody attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If chemical bonding method is used to fix antibody on solid surface, then the degree of firmness is improved, but the activity of the antibody is reduced
Solution Approach 1:
The patent creates a porous surface structure with uniform holes on the medical instrument surface. These pores provide physical anchoring sites for the antibody through adsorption, achieving both firm attachment and preservation of antibody activity. The porous structure allows the antibody to bind firmly while maintaining its functional properties.
Solution Approach 2:
The patent modifies the surface parameters of the medical instrument by creating uniform holes with specific size distributions. This parameter change transforms the surface from a smooth structure to a porous one, enabling physical adsorption of antibodies while maintaining their activity. The controlled pore size and distribution are critical parameters that facilitate both firmness and activity preservation.
2Reliability
If physical adsorption method is used to fix antibody on solid surface, then the activity of the antibody is maintained, but the degree of firmness is reduced
Solution Approach 1:
The patent employs a porous surface structure with uniformly distributed holes that provide physical anchoring sites for antibody adsorption. This porous configuration enables the antibody to attach firmly through physical interactions while preserving its activity, resolving the contradiction between firmness and activity maintenance.
Solution Approach 2:
The patent transitions from a two-dimensional smooth surface to a three-dimensional porous structure with holes of varying depths. This dimensional change creates additional anchoring opportunities for the antibody, enhancing the degree of firmness while maintaining the activity through proper orientation and access to binding sites.
3Manufacturing precision
If chemical corrosion is used to prepare holes in the surface, then the uniformity of holes is improved, but the complexity of the process is increased
Solution Approach 1:
The patent replaces complex mechanical drilling or laser processing methods with chemical corrosion processes to create uniform holes in the metal surface. The chemical corrosion method uses controlled chemical reactions to etch holes of uniform size and distribution, simplifying the overall process while achieving high manufacturing precision.
Solution Approach 2:
The patent controls the uniformity of holes by precisely adjusting chemical corrosion parameters such as corrosion time, temperature, and chemical concentration. By optimizing these parameters, the process achieves uniform hole formation without requiring complex mechanical systems, thereby reducing process complexity while maintaining manufacturing precision.
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 method achieves a high degree of antibody firmness while preserving activity, suitable for medical instruments like stents and biochips, effectively preventing in-stent restenosis and antithrombotic formation, and providing reliable detection results.
Implementation Method 1
fixing the antibody on the surface of the instrument by the attraction between positive and negative charge and physical adsorption effect of holes
Data Source
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AI summary
A method for fixing antibody on the surface of a medical instrument, mainly includes: 1) pre-treating the instrument surface; 2) preparing holes: preparing multicrystal phase structure which has holes of the same size in the surface of the instrument by chemical corrosion, electrochemical corrosion, anodic oxidation, micro-arc oxidation, or micro-arc nitridation; 3) post-treating the instrument surface; 4) fixing the antibody: immersing the bare metal scaffold which has holes in its surface into a buffer solution containing antibody, adjusting the pH value of the antibody buffer solution, fixing the antibody on the surface of the instrument by the attraction between positive and negative charge and hole effect; and 5) confirming the effectiveness of the fixed antibody by artificial simulation hemodynamics and detecting method of antibody activity in the scaffold surface. The method can promote the degree to which the antibody is firmly fixed on the surface of the instrument, and keep high activity of the antibody on the surface of medical instrument.