Cannula Stabilizing Retainer With Movement-Absorbing Base
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Solution Overview
Problem
Intravenous cannulation procedures face issues with cannula stability due to the elastic nature of the cannula, leading to unwanted forces on the entry site during patient movement, causing discomfort, bruising, swelling, and potential occlusion or phlebitis, as well as risk of cannula dislodgement.
Innovation Solution
A tube stabilising device comprising a base member fixable to a patient's surface and a moveable tube retaining member that allows the cannula to move relative to the base member, absorbing movement and reducing forces on the entry site, featuring a support surface, cavity, and clips to securely retain the cannula in a straight or curved configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cannula is fixed rigidly to the patient's skin, then the cannula position is stable, but patient movement causes unwanted forces on the entry site leading to discomfort, bruising, and swelling
Solution Approach 1:
The tube retaining member is designed to be moveable relative to the base member, allowing dynamic adjustment and movement absorption. This enables the system to adapt to patient movement while maintaining cannula stability, preventing harmful forces from being transmitted to the entry site.
Solution Approach 2:
The tube retaining member acts as an intermediary between the fixed base member and the cannula. It absorbs and isolates movement forces, preventing direct transmission of harmful forces from patient movement to the cannula entry site while maintaining secure retention.
2Object-affected harmful factors
If the cannula is allowed to move freely, then patient comfort is improved, but the cannula may dislodge from the entry site
Solution Approach 1:
The moveable tube retaining member provides controlled movement capability within the cavity, allowing the cannula to move freely enough for patient comfort while the cavity boundaries and retention features prevent complete dislodgement, maintaining reliable retention.
Solution Approach 2:
The tube retaining member serves as an intermediary that provides both retention and movement freedom. It secures the cannula to prevent dislodgement while simultaneously allowing controlled movement to accommodate patient comfort needs.
3Reliability
If adhesive tape or sutures are used to fix the cannula, then the cannula is secured to the patient, but the elastic nature of the cannula exerts constant force on the entry site
Solution Approach 1:
The tube retaining member acts as an intermediary that absorbs and distributes the elastic forces exerted by the cannula. Instead of these forces being concentrated on the entry site, they are distributed through the moveable mechanism to the base member, reducing harmful localized forces.
Solution Approach 2:
The moveable tube retaining member allows the cannula to move dynamically in response to elastic forces, preventing these forces from being transmitted as constant stress to the entry site. The system absorbs elastic energy through controlled movement rather than resisting it rigidly.
Data Source
AI summary
A tube stabilising device (10, 20, 30) for a tube attached to a patient, comprising a base member (110, 210, 310) fixable to a surface, the base member having a support surface (112, 212, 312) for supporting the base member on a surface of the patient. The tube stabilising device further comprising a tube retaining member (120, 220, 320). The base member includes a cavity (114, 214, 314) configured to receive a flange (122, 222, 322) of the tube retaining member such that, when received, the cavity at least partially overlaps the flange so that the flange is retained by the base member, the tube retaining member is moveably attached to the base member and the flange is moveable within the cavity in any direction parallel to the support surface. The tube retaining member is configured to retain a tube extending from the patient such that, when retained, the tube is moveable relative to the base member.