Dual Hypotube Suture Cutting Device for Tissue Puncture Closure
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Solution Overview
Problem
Current tissue puncture closure devices require manual cutting of sutures outside the patient, leading to complications and additional procedural complexity, as well as the risk of infections from suture protrusion through the skin.
Innovation Solution
A tissue puncture closure device with an integrated suture cutting mechanism, featuring a compaction member and a suture cutting member with apertures and cutting surfaces, allowing for suture cutting within the percutaneous incision, eliminating the need for external cutting instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cutting of suture outside the patient is used, then the procedure is simple to perform, but the risk of infection increases and procedural time increases
Solution Approach 1:
The suture cutting function is merged with the compaction member by integrating a cutting surface directly onto the compaction member structure. This allows the suture to be cut within the percutaneous incision during the same procedure step when the sealing pad is being compacted, eliminating the need for separate external cutting operations and reducing infection risk.
2Productivity
If integrated suture cutting mechanism is used, then infection risk is reduced and procedural time is shortened, but device complexity increases
Solution Approach 1:
The cutting surface is integrated directly onto the compaction member, merging two functions (compaction and cutting) into a single component. This approach shortens procedural time by eliminating separate cutting steps while avoiding the need for entirely separate cutting devices, thus limiting the increase in overall device complexity.
Solution Approach 2:
The compaction member is designed with multi-functionality by incorporating a cutting surface, allowing it to perform both the compaction of the sealing pad and the cutting of the suture. This universal design reduces the number of separate components needed, thereby limiting the increase in device complexity while improving productivity.
3Ease of operation
If suture is cut outside the patient, then the cutting process is simple, but additional procedural steps are required
Solution Approach 1:
The cutting surface is prepared and positioned on the compaction member before the procedure begins. During the procedure, the suture is cut as part of the compaction step itself, rather than requiring a separate subsequent cutting step. This preliminary preparation of the cutting mechanism eliminates additional procedural time while maintaining operational simplicity.
Data Source
AI summary
A tissue puncture closure device includes an anchor, a sealing pad, a compaction member, a suture, and a suture cutting member. The compaction member is configured to compress the sealing pad toward the anchor. The compaction member includes a sidewall and a first aperture defined in the sidewall. The suture cutting member is positioned in the compaction member and includes a suture cutting member sidewall and a second aperture defined in the suture cutting member sidewall. The suture is coupled to the sealing pad and anchor, and a portion of the suture extends through the first and second apertures. Relative movement between the compaction member and the suture cutting member severs the suture.