Two-Step Skin Preparation for Accurate Blood Sampling
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Solution Overview
Problem
Current methods for preparing skin surfaces for patient samples, such as blood samples, are inadequate in removing contaminants like proteins, bacteria, and viruses, leading to inaccurate assay results due to residual contaminants on the skin.
Innovation Solution
A method involving two distinct wipes, one with a surfactant solution and another with an antiseptic solution, is used to clean the skin surface, where the surfactant wipe removes contaminants and the antiseptic wipe ensures surface sterility and facilitates blood collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single wipe with antiseptic solution is used, then the process is simple and quick, but contaminants like proteins are not effectively removed leading to inaccurate assay results
Solution Approach 1:
The single wiping step is segmented into two distinct wiping steps: first with a surfactant solution to remove protein contaminants, then with an antiseptic solution to achieve sterility. This segmentation allows each wipe to target specific contaminants, improving overall cleaning effectiveness and assay accuracy.
Solution Approach 2:
The surfactant wipe is applied as a preliminary action before the antiseptic wipe. By removing protein contaminants first, the surfactant wipe prepares the surface for subsequent antiseptic treatment, ensuring that the antiseptic can effectively reach and kill bacteria without being hindered by protein barriers.
2Measurement precision
If multiple wipes are used to remove contaminants, then cleaning effectiveness improves, but the time required for skin preparation increases
Solution Approach 1:
The cleaning process uses periodic action with two distinct wiping phases: first the surfactant wipe removes organic contaminants, then the antiseptic wipe eliminates microorganisms. Each phase is performed sequentially with optimal timing, ensuring thorough contaminant removal while maintaining efficient workflow and minimizing total preparation time.
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 approach significantly increases the removal of contaminants like PSA proteins, improving the accuracy of biological samples by reducing residual contaminants on the skin surface, thereby enhancing the reliability of subsequent assays.
Implementation Method 1
a first wipe, wherein the first wipe comprises a solution comprising a surfactant
Implementation Method 2
a second wipe, wherein the second wipe comprises an antiseptic solution
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Articles and methods for preparing a surface for obtaining a patient sample, such as blood, are generally provided. In some embodiments, the methods involve wiping a surface of skin of a patient in preparation for obtaining a sample (e.g., a blood sample) from the patient. In some embodiments, the methods involve wiping the surface of the skin with two or more wipes. For instance, the surface of the skin may be wiped with a first wipe comprising a surfactant and a second wipe comprising an antiseptic solution. Advantageously, the use of a first wipe including a surfactant followed by a second wipe may remove a higher amount of certain contaminants (e.g., proteins, bacteria, viruses) from the surface of the skin as compared to the use of a single wipe or by hand-washing alone.