Snap-over Clamshell Port Cap for Tamper-Evident Medication Sealing

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Solution Overview

Problem

Current medical fluid containers lack effective mechanisms to prevent drug administration errors, tampering, and unauthorized access, particularly in emergency situations where quick handling increases the risk of incorrect or intentional substance additions or withdrawals.

Innovation Solution

A snap-over clamshell protective port cap that securely covers the injection port, featuring interlocking cylindrical halves with a hinge and puncture-resistant design, making it impossible to remove without visible damage, thus deterring unauthorized access and ensuring the integrity of medication solutions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If adhesive labels are used to indicate drug administration, then the method is simple and inexpensive, but the labels can be removed and do not offer resistance to subsequent needle penetration

Engineering Contradiction:

Improvesimplicity and low cost of labeling methodVSAvoidprotection against tampering and unauthorized access

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent employs a disposable port cap that is discarded after single use. This eliminates the need for reusable protective mechanisms while providing reliable tamper evidence. The cap is designed to be inexpensive yet effective, covering the port completely and showing visible damage if attempted to be removed or penetrated, thus resolving the contradiction between low cost and high reliability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Ease of operation

If a protective cap is designed to be completely removable, then it is easy to apply and remove, but it provides no evidence of tampering and offers no resistance to unauthorized access

Engineering Contradiction:

Improveease of application and removalVSAvoidtamper evidence and puncture resistance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The port cap incorporates a puncture-resistant barrier and tamper-evident design that preemptively prevents unauthorized access. The cap is designed to show visible damage or deformation if anyone attempts to penetrate or remove it without proper authorization, thus providing preliminary protection against tampering while maintaining ease of legitimate application.

Inventive Principle:

Principle #9Preliminary anti-action

3Strength

If the cap material is made rigid and puncture-resistant, then it deters unauthorized access, but it may be more difficult to manufacture and dispose of

Engineering Contradiction:

Improvepuncture resistance and deterrence of unauthorized accessVSAvoidmanufacturing complexity and disposal difficulty

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS8091727B2Snap-over clamshell protective port cap

Publication Date: 2012.01.10 HOSPIRA INC

AI summary

A single-use, clamshell protective cap for use primarily in healthcare settings in order to maintain the integrity of a medication solution. The cap has two halves, a cylindrical skirt, a puncture resistant lid portion, an interior flange, and an interlocking snap. When placed around a flanged injection port such as is found on a conventional fluid container and closed, the lid portion covers an access site on an injection port. After the cap is placed, the interior flange engages the port flange to prevent upward axial movement relative to the port, thereby preventing removal of the cap and thus deterring unwanted or erroneous drug administrations or withdrawals.