Surgical Fixing Tool for Heart Surface Stabilization
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Solution Overview
Problem
Existing surgical fixing tools struggle to maintain stability at the central operation site on a heart surface during off-pump coronary artery bypass procedures, as the site moves vertically with heartbeats, making vascular anastomosis challenging.
Innovation Solution
A surgical fixing tool with a support unit, position adjusting unit, and displacement position detection unit that surrounds and fixes the operation site, using suction pads and hydraulic fluid to adjust the position relative to the heart surface, preventing vertical movement by detecting and compensating for heartbeat-induced displacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a surgical fixing tool is used to fix the peripheral portion of the heart surface, then movements of the peripheral portion are inhibited, but the operation target site at the central position moves vertically in response to heartbeats
Solution Approach 1:
The support unit is designed with movable components that can dynamically adjust to the heartbeat-induced movements. The suction pads can move vertically while maintaining suction contact, allowing the support unit to adapt to the dynamic nature of the beating heart rather than rigidly constraining it.
Solution Approach 2:
The support unit is divided into multiple independent suction pads that can move relative to each other. This segmentation allows different portions of the support unit to independently accommodate local movements of the heart surface while maintaining overall stability for the operation site.
2Ease of operation
If an artificial cardiopulmonary device is used to immobilize the heart, then vascular anastomosis can be performed easily, but the device is expensive, bulky, and causes inflammatory reactions
Solution Approach 1:
The invention extracts and isolates only the necessary function of the artificial cardiopulmonary device - local immobilization of the operation site - without requiring the entire heart-lung bypass system. The support unit provides localized stabilization while the rest of the heart continues to beat naturally, eliminating the need for complex cardiopulmonary support equipment.
Solution Approach 2:
The support unit acts as an intermediary device between the beating heart and the surgical instruments. It provides a stable platform for vascular anastomosis while allowing the heart to maintain its natural beating rhythm, serving as a mediator that enables precise surgery without requiring complete heart immobilization.
3Reliability
If the heart is allowed to beat during surgery, then the artificial cardiopulmonary device is not needed, but the operation target site moves making vascular anastomosis difficult
Solution Approach 1:
The support unit applies localized stabilization only to the specific operation site where vascular anastomosis is performed, while leaving the rest of the heart free to beat naturally. This local quality approach ensures that the beneficial effects of heart beating (reduced inflammation) are maintained throughout most of the heart, while the specific operation area receives the stability needed for precise surgery.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable and stable vascular anastomosis by inhibiting vertical movement of the operation site, facilitating precise surgical procedures without the need for bulky artificial cardiopulmonary devices.
Implementation Method 1
a movable suction unit (12) having a suction pad (21, 22) held in a lower portion of the fixing base (11) so as to hold the heart (H) surface S by suction
Implementation Method 2
the actuator chamber (51, 52) volume is changed according to a hydraulic fluid pressure
Implementation Method 3
a drive unit (55) which feeds the hydraulic fluid to the actuator members (51, 52)
Data Source
AI summary
A surgical fixing tool for vascular anastomosis inhibits an operation site on a surface of a living body such as a heart from moving along a height direction of the surface of the living body. The fixing tool has a position adjusting unit disposed in a support unit 10 that adjusts a relative position between the support unit and the fixed living body local site. A displacement position detection unit detects a displacement position of a local site. Based on a detected displacement, the position adjusting unit changes and adjusts a relative position between the support unit and the fixed local site.