Laparoscopic Gallbladder Extraction Device with Cutting Capture
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Solution Overview
Problem
Current laparoscopic cholecystectomy procedures face inefficiencies in removing gallbladders due to bile leakage and the need for additional time when gallbladders are full or large, often requiring enlargement of incisions and manual extraction methods.
Innovation Solution
A surgical instrument with a handle assembly, elongated body, and a capture portion that includes sharpened members for cutting tissue, allowing for efficient retrieval of gallbladders through a minimally invasive incision by transitioning between open and closed configurations, facilitated by a linkage system and trigger mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a retrieval bag is used to contain the gallbladder during removal, then bile leakage is prevented, but the extraction time increases and the procedure becomes more complex
Solution Approach 1:
The capture portion is pre-loaded into the elongated body portion in a compact state before the procedure. The sharpened members are positioned in advance to automatically engage the gallbladder tissue when the capture portion is deployed, eliminating the need for manual bagging and preparation time during the critical extraction phase.
Solution Approach 2:
The harmful element (gallbladder with bile) is completely enclosed within the capture portion's sealed chamber, physically separating it from the surgical field. The sharpened members cut the tissue to secure it inside, ensuring bile containment without requiring additional retrieval bags or complex manual containment procedures.
2Ease of operation
If the incision is enlarged to remove a large or stone-filled gallbladder, then extraction is facilitated, but tissue damage increases and minimally invasive benefits are reduced
Solution Approach 1:
The capture portion dynamically transforms from a compact loaded state to an expanded deployment state within the body cavity. The elongated body portion acts as a delivery mechanism that maintains the capture portion in a constrained configuration during insertion, then allows expansion once positioned, enabling adaptation to gallbladders of various sizes without incision enlargement.
Solution Approach 2:
The extraction problem is solved by adding the dimensional aspect of the elongated body portion that extends through the incision. The capture portion operates in three-dimensional space within the body cavity, allowing it to accommodate large gallbladders internally while maintaining a small external profile during insertion and removal through the standard incision.
3Adaptability or versatility
If manual extraction methods with clamps are used to remove the gallbladder piece by piece, then extraction is achieved for large gallbladders, but surgical time increases significantly
Solution Approach 1:
Multiple functions are merged into a single integrated device: the elongated body portion serves as both delivery mechanism and structural support, while the capture portion combines containment, cutting (via sharpened members), and extraction functions. This eliminates the need for separate clamps, scissors, and manual manipulation steps, allowing complete gallbladder removal in one action regardless of size or stone content.
Solution Approach 2:
The capture portion is designed as a universal extraction device that handles all gallbladder types (small, large, stone-filled, bile-filled) through its expandable chamber and sharp cutting members. The single device replaces multiple specialized tools and manual techniques, providing consistent efficient extraction across all surgical scenarios without requiring technique changes or additional instruments.
Data Source
AI summary
A surgical instrument for removing a gallbladder is provided. The surgical instrument includes a handle assembly, an elongated body portion extending distally from the handle assembly, and a capture portion operably mounted on a distal end of the elongated body portion. The capture portion defines a tissue receiving opening when in an open configuration and is configured for receipt through an incision when in the capture portion is in a closed configuration. The capture portion includes at least one sharpened member for cutting tissue received within the tissue receiving opening as the capture portion moves from the open configuration to the closed configuration. Also provided is a method of removing a gallbladder using a surgical instrument.