Magnetic Compression Ureter-Ileal Conduit Anastomosis

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional surgical methods for forming anastomosis between the ureter and ileal conduit after cystectomies, such as those used in bladder cancer treatment, are lengthy and inefficient, particularly for patients with ureteral strictures following robotic surgery.

Innovation Solution

The use of magnetic compression anastomosis techniques involving rare earth magnets placed within catheters to compress tissue between the ureter and ileal conduit, either with or without radioactive materials, to form a side-to-side anastomosis, potentially reducing surgery time and complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional surgical methods are used to form anastomosis between ureter and ileal conduit, then reliable connection is achieved, but surgical time and complexity increase significantly

Engineering Contradiction:

Improveanastomosis connection reliabilityVSAvoidsurgical time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces conventional mechanical suture-based anastomosis with a magnetic compression system. Magnets applied to the exterior of the ureter and ileal conduit generate magnetic attraction force that compresses the tissues together, eliminating the need for time-consuming suturing while maintaining reliable connection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the physical parameter of tissue connection from mechanical interlocking (sutures) to magnetic compression. By controlling the magnetic field strength and compression force, the system achieves reliable anastomosis faster than conventional methods, directly addressing the time-reliability contradiction.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If conventional surgical methods are used to form anastomosis between ureter and ileal conduit, then reliable connection is achieved, but surgical complexity increases

Engineering Contradiction:

Improveanastomosis connection reliabilityVSAvoidsurgical procedure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical suturing procedures with a simpler magnetic compression system. The magnets are applied externally through the catheter, eliminating the need for internal sutures, tissue handling, and knot tying, thereby reducing surgical complexity while maintaining connection reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The catheter acts as an intermediary device that delivers the magnets to the target location and facilitates the magnetic compression. This intermediary system simplifies the surgical procedure by providing a straightforward mechanism for applying compression force without requiring complex direct tissue manipulation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of time

If magnetic compression is applied to compress tissue between ureter and ileal conduit, then surgical time is reduced, but sufficient compression force must be generated to form anastomosis

Engineering Contradiction:

Improvesurgical timeVSAvoidcompression force

Core Design Contradiction:

Loss of timeVSForce

Solution Approach 1:

The patent uses magnetic attraction force instead of mechanical compression devices to generate the necessary compression force. The magnetic field provides sufficient force to compress the ureter and ileal conduit tissues together, forming the anastomosis quickly and effectively without requiring complex mechanical compression apparatus.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This method allows for the formation of anastomosis with reduced surgical time and complexity, enabling quicker recovery and potentially more efficient stricture management without the need for lengthy conventional surgical repairs.

Implementation Method 1

compressing tissue trapped between the first and second magnets based on a magnetic attraction force generated by the magnets

Methodology Applied

Scientific EffectMagnetic attraction force: Magnetism

Implementation Method 2

The at least one of the first and second magnets may optionally include a radioactive material. The method can further include exposing the trapped tissue to radiation from the at least one magnet.

Methodology Applied

Scientific EffectRadiation: Radiation

Data Source

PatentUS9332990B2Ureter to ileal conduit anastomosis using magnetic compression and related delivery devices and methods

Publication Date: 2016.05.10 WAKE FOREST UNIVERSITY HEALTH SCIENCES INC

AI summary

Magnetic compression anastomosis can be carried out by placing cooperating magnets, one in the ileal conduit and one in the ureter, to lock together and form the anastomosis. The magnets may be placed to form a side-to-side anastomosis. At least one of the magnets can include radioactive material. Catheters may be used to place the magnets, and the catheters may have at least one deflatable or retractable tissue spacer.