Instrument Fixation Device for Trocar Position Stability
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Solution Overview
Problem
During minimally invasive surgery (MIS), there is a need for an improved and simplified means to fixate medical instruments and trocars within the trocar system, reducing the burden on surgical staff and preventing undesired movement of instruments and trocars.
Innovation Solution
The development of an instrument fixation device that connects to the trocar housing, allowing medical instruments of varying sizes to be locked in a fixed position within the cannula. This device features a mechanism with a translational actuation member that shifts between open and closed configurations, enabling secure locking of instruments with minimal ergonomic strain on surgical staff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a staff member manually holds the medical instrument or trocar in position during the procedure, then the position can be maintained, but the surgical staff bears excessive burden and ergonomic strain
Solution Approach 1:
The instrument fixation device enables self-fixation of the medical instrument within the trocar system. The device includes clamping surfaces and an actuation mechanism that allows the instrument to be securely held without requiring continuous manual support from surgical staff, thereby reducing ergonomic strain while maintaining position stability
Solution Approach 2:
The instrument fixation device acts as an intermediary mechanism between the medical instrument and the trocar housing. It provides a mechanical interface that secures the instrument in position through clamping surfaces and an actuation member, eliminating the need for direct manual holding by surgical staff
2Adaptability or versatility
If the trocar is allowed to move freely within the body cavity, then access flexibility is improved, but undesired movement and dislocation occur increasing incision tension
Solution Approach 1:
The trocar fixation system provides dynamic positioning capability. The fixation device can be adjusted between locked and unlocked states, allowing the trocar to be secured in a desired position to prevent dislocation and reduce incision tension, while still permitting repositioning when needed during the surgical procedure
3Productivity
If multiple trocars are inserted for simultaneous instrument use, then surgical capability is enhanced, but the complexity of fixing and accessing each trocar increases
Solution Approach 1:
The instrument fixation device is designed with universal applicability to work with multiple different medical instruments and trocar configurations. The standardized clamping mechanism and actuation system can secure various instrument types, reducing the overall complexity of managing multiple trocars while maintaining high surgical productivity
Data Source
Figure 1a~1b
Figure 1c
Figure 2a
AI summary
An instrument fixation device 1 for holding a medical instrument 32 in a trocar system 21 is disclosed herein. The trocar system 21 comprising a trocar cannula 21a and a trocar housing 21b, the instrument fixation device 1 comprising a trocar housing connector 2 adapted for connection between the instrument fixation device 1 and the trocar housing 21b. The instrument fixation device 1 comprising an instrument receiving opening 3 and an open configuration allowing the medical instrument 32 to move freely in the longitudinal direction L and a closed configuration wherein the medical instrument 32 is restrained from movement in the longitudinal direction L by clamping of the medical instrument 32 between a first and second opposing clamping surface 6,7 of the instrument fixation device 1 with a clamping force being directed in a transverse direction T. The instrument fixation device 1 comprising an actuation member 8 configured shifting the configuration of the instrument fixation device 1 between the open configuration and the closed configuration, by means of a translational movement of the actuation member 8, the translational movement being in the transverse direction T of the instrument fixation device 1 and wherein the closed configuration of the instrument fixation device 1 includes a sub-set of positions with varying distances between the first and the second opposing clamping surface 6,7 in each of the positions in the sub-set of positions. Disclosed herein is also a trocar fixation assembly comprising a trocar fixation device and an instrument fixation device and a trocar system comprising a trocar and the trocar fixation assembly.