Cannula Cap Seal for Single-Port Surgical Instrument Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In minimally invasive surgery, using multiple cannulas for multiple surgical instruments complicates instrument management and maintains insufflation gas pressure, especially when transitioning instruments through a single access port, leading to potential gas leakage and reduced mobility.
Innovation Solution
A cannula cap system with an instrument guide attachment and a seal mechanism that captures between the guide and cannula attachment, providing a secure and flexible seal to maintain insufflation pressure and facilitate instrument mobility through a single cannula.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple surgical instruments are introduced through a single cannula, then the number of incisions is reduced, but it becomes difficult to manage instrument mobility and maintain insufflation pressure
Solution Approach 1:
The single cannula is segmented into multiple separate channels or lumens, allowing each surgical instrument to have its own dedicated pathway. This segmentation enables independent instrument manipulation and mobility while maintaining a single external incision site, thus reducing patient trauma without compromising ease of operation.
Solution Approach 2:
A seal mechanism acts as an intermediary component within the cannula system, preventing insufflation gas leakage at the instrument-cannula interface. This intermediary seal maintains positive pressure while allowing instruments to move freely within their respective channels, resolving the contradiction between maintaining pressure and ensuring instrument mobility.
2Object-affected harmful factors
If a single larger cannula is used to accommodate all instruments, then the number of incisions is reduced, but the cannula size increases and may cause more trauma
Solution Approach 1:
Instead of using one large cannula, the system employs a single cannula containing multiple smaller internal channels. This segmentation approach maintains a small external cannula diameter (minimizing incision size and trauma) while providing separate pathways for multiple instruments, thus achieving single-port access without increasing cannula size.
Solution Approach 2:
Multiple smaller instrument channels are nested within the single cannula structure, similar to nested dolls. This nesting configuration allows multiple instruments to pass through a small external cannula without requiring a larger diameter, thereby reducing patient trauma while maintaining single-port access.
3Adaptability or versatility
If instruments are frequently inserted and removed through the cannula, then surgical flexibility is improved, but insufflation gas leakage increases
Solution Approach 1:
Seals are pre-positioned at the instrument-cannula interface before instrument insertion. These preliminary seals are designed to automatically engage with instruments as they are inserted, maintaining insufflation pressure without requiring complex active sealing mechanisms. This preliminary sealing action allows flexible instrument exchange while preventing gas leakage.
Solution Approach 2:
The seal mechanism is designed to be dynamic, automatically adjusting and conforming to different instrument diameters and shapes as they are inserted or removed. This dynamic sealing capability maintains insufflation pressure throughout instrument exchanges, providing surgical flexibility without gas leakage.
Data Source
AI summary
A cannula cap is disclosed. A cannula cap according to some embodiments of the invention includes an instrument guide attachment; a cannula attachment; and a seal captured between the instrument guide attachment and the cannula attachment. In some embodiments, a cannula cap can include a lid; a locking ring; a base; and a cannula seal captured between the lid and the base.