Single-Operator Medical Insertion Device with Force Feedback
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Solution Overview
Problem
Current catheter treatment methods require two doctors to manually manipulate delivery wires and catheters, leading to increased operational complexity, difficulty in sensing delicate patient variations, and higher costs due to the need for a master-slave drive system with multiple components.
Innovation Solution
A single-operator insertion device that includes a drive device with a torque generator, speed reducer, and foot switches for controlling the movement of medical linear bodies, along with a measurement and informative system for compressive force, allowing a single doctor to manually handle and control the insertion of medical linear bodies into bodily vessels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two doctors manually manipulate delivery wire and catheter, then the medical linear body can be inserted, but the operational complexity increases and the cost increases due to needing multiple operators
Solution Approach 1:
The patent combines the manipulation of both the catheter and delivery wire into a single operator's control. The operator holds the catheter while the delivery wire is automatically fed through the catheter using a drive mechanism, merging two manual manipulation tasks into one coordinated operation. This eliminates the need for two doctors working in liaison while maintaining precise control over both components.
Solution Approach 2:
The delivery wire feeding mechanism operates automatically once the catheter is positioned, eliminating the need for a second operator to manually feed the wire. The drive mechanism self-regulates the wire feed rate based on the catheter's movement, providing self-service functionality that reduces operational complexity while maintaining ease of use.
2Productivity
If two doctors manipulate delivery wire and catheter in liaison, then the insertion can be performed, but the time required increases due to coordination needs
Solution Approach 1:
The drive mechanism continuously feeds the delivery wire through the catheter at a controlled rate, eliminating interruptions and coordination delays between two operators. The wire feed rate is continuously adjusted to match the catheter advancement speed, ensuring uninterrupted insertion and reducing total procedure time while maintaining operational efficiency.
3Ease of manufacture
If a master-slave drive system is used, then the costs are reduced, but the device complexity increases due to multiple components
Solution Approach 1:
The patent extracts and eliminates the complex master-slave drive system components, retaining only the essential drive mechanism for feeding the delivery wire. By removing the master-slave architecture and its multiple components, the device becomes simpler to manufacture while maintaining cost-effectiveness through reduced part counts and assembly requirements.
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
The device enables a single doctor to perform catheter treatments efficiently, reduces operational complexity, and lowers costs by eliminating the need for a multi-component master-slave system while ensuring precise control and minimizing insertion resistance.
Implementation Method 1
The driving roller and the driven roller have rotation surfaces and a rotation surface, respectively, cooperating to pinch the medical linear body
Implementation Method 2
The hole has an inner circumferential surface provided with a seal in contact with an outer circumferential surface of the rotary unit and sealing an interior of the casing externally
Data Source
AI summary
There is provided an insertion device allowing a doctor to alone perform an operation to insert a medical linear body. The insertion device, operated to insert a delivery wire (104) into a human body (131) through a blood vessel (132), includes a foot switch (41, 46) generating and outputting a signal to control starting/stopping a drive device (1) moving the delivery wire (104) in its longitudinal direction. Furthermore, the insertion device includes an insertion force sensor (60) operative to measure longitudinally compressive force exerted to the delivery wire (104), and a speaker (92) and a display (93) informing an operator of the compressive force measured by the insertion force sensor (60).