Detachable Implant Delivery Catheter for Stable Positioning
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Solution Overview
Problem
Existing delivery devices for medical implants, such as those used in transapical cardiac surgeries, are cumbersome, unstable, and require complex holding systems that prolong operation time due to their large size and weight, affecting positioning accuracy and stability.
Innovation Solution
A detachable delivery device with a handle and catheter assembly connected by a flexible transmission shaft, allowing for independent movement and adjustment of the catheter assembly for precise positioning and reducing overall size for improved stability and convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a holding system is added to the delivery device to provide stable supporting force and multiple degrees of freedom, then positioning accuracy and stability are improved, but device weight and size increase, and operation time is prolonged
Solution Approach 1:
The patent extracts the holding system from the delivery device, separating the delivery function from the holding function. The delivery device becomes a lightweight, flexible catheter without the need for a bulky external holder, while positioning is achieved through the catheter's inherent flexibility and the operator's ability to manipulate it directly.
Solution Approach 2:
The patent introduces a flexible transmission shaft as an intermediary between the operator's hand and the delivery catheter. This transmission shaft allows for precise positioning and stabilization without requiring a separate holding system, as it can be directly manipulated to achieve the desired positioning accuracy.
2Reliability
If a holding system is added to the delivery device to provide stable supporting force and multiple degrees of freedom, then positioning accuracy and stability are improved, but device complexity and bulkiness increase
Solution Approach 1:
The patent removes the complex holding system from the delivery device architecture. The delivery catheter is designed to be self-sufficient without requiring an external holder, thereby eliminating the complexity associated with constructing, adjusting, and fastening holder components.
Solution Approach 2:
The flexible transmission shaft serves multiple functions: it transmits mechanical forces, enables positioning, provides stabilization, and allows for manipulation in multiple degrees of freedom. This multi-functionality eliminates the need for separate holding system components.
3Measurement precision
If a holding system is added to the delivery device to provide stable supporting force and multiple degrees of freedom, then positioning accuracy is improved, but operation time is prolonged due to construction, adjustment and fastening steps
Solution Approach 1:
The patent eliminates the time-consuming steps of constructing, adjusting, and fastening a holder by removing the holding system entirely. The flexible transmission shaft can be directly manipulated to achieve positioning accuracy without these preliminary setup steps.
Solution Approach 2:
The flexible transmission shaft is pre-configured with the necessary flexibility and mechanical properties to enable direct positioning without requiring additional setup steps. The catheter assembly is designed to be ready for immediate manipulation and positioning.
4Reliability
If a holding system is added to the delivery device to provide stable supporting force and multiple degrees of freedom, then positioning stability is improved, but device size increases adversely affecting convenience
Solution Approach 1:
The patent extracts the holding system from the delivery device, eliminating the need for a large external holder. The delivery catheter and flexible transmission shaft maintain positioning stability through their inherent flexibility and design, without requiring additional space for holder components.
Solution Approach 2:
The flexible transmission shaft is nested within or integrated with the delivery catheter assembly, allowing both components to work together in a compact configuration. This nesting eliminates the need for separate holder components that would increase overall device size.
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 enhances positioning accuracy and stability, reduces operation time, and improves the quality of medical implant procedures by allowing flexible and precise adjustments without the need for bulky holding systems.
Implementation Method 1
The catheter assembly further comprises a transmission assembly, the transmission assembly comprising a screw rod and a screw nut, wherein the screw rod is engaged with the screw nut that is fixedly connected to the outer tube assembly; when the transmission shaft is connected to the catheter assembly, the transmission shaft is connected to the screw rod so that the screw nut and the outer tube assembly are forced to move axially resulting from rotation of the screw rod due to rotation of the transmission shaft.
Data Source
AI summary
The present invention provides a delivery device for medical implants. The delivery device has a detachable structure and includes a handle (3) and a catheter assembly (1) that are separated from each other. The handle (3) and the catheter assembly (1) are connected by a transmission shaft (2). By configuring the handle (3) and the catheter assembly (1) to be separated from each other, the catheter assembly (1) has less weight than that of a traditional delivery assembly, so that the operator can position the medical implant and adjust the position of the medical implant by moving only the catheter assembly (1). The catheter assembly (1) is lighter in weight and smaller in size, which improves the stability, precision and accuracy of the operation. Moreover, the impact of vibration and/or movement of the handle (3) on the catheter assembly (1) are avoided, which further improves the stability and thus the quality of the operation.