Adhesive Protective Cap Structure for Reliable IV Catheter Fixation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
IV catheter assemblies have a high failure rate due to inadequate fixation of the catheter to the patient's skin, leading to accidental removal, blood leakage, and potential health risks, with existing protective caps not addressing this issue effectively.
Innovation Solution
A protective cap for needle devices that incorporates an adhesive solution stored in a cavity, allowing secure fixation of the catheter to the patient's skin after venipuncture, featuring a removable lid and a spout for easy application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional protective cap is used to cover the needle tip, then safety during packaging and transport is improved, but the cap is discarded after use and does not provide catheter fixation
Solution Approach 1:
The protective cap is transformed from a single-function safety cover into a multi-functional device that combines needle protection with catheter fixation capabilities. The cap includes both a needle cavity for covering the sharp tip and an adhesive cavity for securing the catheter to the patient's skin, allowing one component to serve multiple purposes in the catheter insertion and fixation process.
Solution Approach 2:
The invention merges the protective cap function with the fixation mechanism by integrating an adhesive cavity into the cap structure. The adhesive solution stored in the cavity is applied to the patient's skin to secure the catheter, combining what were previously separate functions (protection and fixation) into a single integrated component.
2Ease of operation
If the catheter is inserted without adequate fixation, then the insertion procedure is simpler, but the catheter may be accidentally pulled out causing blood leakage and infection risks
Solution Approach 1:
The adhesive solution is pre-loaded into the protective cap before the catheter insertion procedure begins. After the catheter is inserted into the vein and the needle is removed, the adhesive is applied to the patient's skin at the insertion site, providing immediate fixation. This preliminary preparation of the adhesive eliminates the need for separate fixation steps and ensures prompt securing of the catheter.
3Reliability
If adhesive solution is stored in the protective cap, then catheter fixation is improved, but the device complexity increases
Solution Approach 1:
The adhesive cavity is nested within the protective cap structure, with the adhesive contained in a dedicated compartment inside the cap body. The barrier membrane separates the adhesive from the needle cavity while utilizing the existing cap geometry, effectively nesting the fixation mechanism within the protective housing without requiring entirely separate components.
Solution Approach 2:
A flexible barrier membrane is used to separate the adhesive cavity from the needle cavity within the protective cap. This thin film structure provides effective separation while maintaining the compact integrated design, allowing the adhesive to be contained and dispensed without complicating the overall cap structure.
4Object-affected harmful factors
If the adhesive cavity is sealed with a lid, then adhesive contamination is prevented, but the ease of adhesive application is reduced
Solution Approach 1:
The protective cap is segmented into distinct functional zones: the needle cavity for needle protection, the adhesive cavity for storing the adhesive solution, and the spout for controlled dispensing. The lid seals the adhesive cavity to prevent contamination, while the spout provides a dedicated outlet for easy, controlled application of the adhesive to the patient's skin without requiring to open the entire cap.
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
The adhesive cap effectively secures the catheter to the patient, reducing failure rates and preventing accidental removal, thereby enhancing patient comfort and safety.
Implementation Method 1
an adhesive solution stored in a cavity, allowing secure fixation of the catheter to the patient's skin
Data Source
Figure 1~2
Figure 3
Figure 4~7
AI summary
A needle assembly (100) includes a catheter hub (102), a catheter tube (105), a needle hub (104), a needle (106), a needle tip (108) extending out the catheter tube (105). A protective cap (200, 300, 400) covers the catheter tube (105) and the needle tip (108). The protective cap (200, 300, 400) has a casing (210, 310) having a first opening (214) at a proximal end of the casing body (219, 319), a proximal cavity (220) having the needle tip (108) and the catheter tube (105) located in the proximal cavity (220), a second opening (212) at an end opposite the first opening (214) and opening into a distal cavity (230, 330). A lid (260, 360) is removably attached to a rim (211, 336) at the second opening (212) to seal a solution inside the distal cavity (230, 330). The solution is dispensable from the distal cavity (230, 330).