Electric Surgical Stapler Motorized Anvil Control

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Solution Overview

Problem

Current surgical staplers are hand-powered, requiring significant physical force and lack an active compression indicator to optimize tissue compression, leading to potential tissue degradation and inconsistent stapling results.

Innovation Solution

A hand-held, electrically powered surgical stapler with a built-in tissue compression indicator and motorized anvil control, allowing precise control of staple firing and tissue compression force to prevent over-compression.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If hand-powered mechanical actuation is used for stapler closure and staple firing, then the device structure remains simple, but significant physical force (113.40 kg at staple cartridge) is required and tissue compression cannot be optimized

Engineering Contradiction:
Improvephysical force requiredVSAvoiddevice structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the hand-powered mechanical actuation system with an electric motor system. The motor is connected to the anvil and staple cartridge through a drive mechanism, enabling automated closure and staple firing without requiring the physician to manually apply 113.40 kg of force. This substitution reduces physical effort while accepting increased device complexity through the addition of motor components.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The electric motor system enables the stapler to perform closure and firing operations autonomously without continuous manual intervention. Once activated, the motor-driven mechanism automatically positions and actuates the staple cartridge and anvil, allowing the device to service itself through automated mechanical sequences controlled by electrical signals.

Inventive Principle:
Principle #25Self-service

2Reliability

If no active compression indicator is provided, then the device structure remains simple, but tissue degradation occurs due to over-compression or insufficient compression

Engineering Contradiction:
Improvestapling consistencyVSAvoidcompression monitoring system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent incorporates a compression indicator that provides real-time feedback to the physician during tissue compression. This indicator monitors the compression force applied between the anvil and staple cartridge, allowing the physician to adjust the compression level to achieve optimal tissue blanching without over-compression. The feedback mechanism ensures consistent and reliable stapling results by preventing tissue degradation.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The compression indicator allows the physician to perform preliminary assessment and adjustment of tissue compression before staple firing. By monitoring compression levels in advance, the physician can optimize tissue preparation and ensure appropriate compression force is applied, preventing both over-compression and insufficient compression that would lead to stapling failures.

Inventive Principle:
Principle #10Preliminary action

3Loss of information

If mechanical bar indicator is used for staple firing distance, then the device structure remains simple, but no information about tissue compression force is provided

Engineering Contradiction:
Improvecompression force informationVSAvoidindicator system
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent enhances the indicator system to serve multiple functions: it displays both the staple firing distance (similar to traditional mechanical indicators) and provides real-time information about tissue compression force. This multi-functional indicator eliminates information loss by simultaneously presenting both distance and compression force data to the physician, enabling comprehensive monitoring of stapling parameters.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The enhanced indicator system acts as an intermediary that translates mechanical compression force into visible information for the physician. By incorporating sensors or measurement mechanisms that convert physical compression into readable indicators, the system mediates between the mechanical action and the physician's decision-making, providing complete information about both position and compression force.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentEP3181063B1Surgical device
Publication Date: 2019.09.11 ETHICON ENDO SURGERY INC
  • EP3181063B1 patent drawingFigure 1
  • EP3181063B1 patent drawingFigure 2
  • EP3181063B1 patent drawingFigure 3

AI summary

A hand-held, electrically powered and controlled surgical stapler/cutter (1) comprises a handle (10, 11, 13) containing therein a selectively actuated, self-contained electric power supply (600) having at least one battery cell (602), at least part of an anvil control assembly (70, 100, 110, 112, 114, 116, 120, 130, 141, 142, 150, 160, 170, 180, 190, 192, 340), an electric motor (120) operatively coupled to the anvil control assembly and power supply, the electric motor being operable to actuate the anvil control assembly when the motor is supplied with power, at least one limit switch (610, 612, 614, 616) operable to detect an extent of actuation of the anvil control assembly, and at least part of an electrically-powered stapler/cutter control assembly (200, 210, 220, 230, 240, 252, 300, 320, 330, 340) electrically connected to the power supply.A surgical end effector (40, 50, 60) is connected to the handle (10, 11, 13) and operatively connected to each of the anvil control assembly and the stapler/cutter control assembly, the stapler/cutter control assembly stapling and cutting tissue disposed at the surgical end effector (40, 50, 60) when powered by the power supply.