Incision Block Positioning Device with Spring-Loaded Pressing Element
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Solution Overview
Problem
Repeated use of positioning devices for medical instruments leads to attrition and slit wear, causing misalignment of incision blocks and planes during surgical procedures for implant placement.
Innovation Solution
A coupling mechanism between a reference star and incision block slits that uses a position determining element with a reference element and a pressing element, biased by a spring, to maintain precise contact and minimize wear effects, ensuring accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plates are inserted into guiding slits for positioning, then positioning function is achieved, but repeated use causes attrition and slit wear leading to misalignment
Solution Approach 1:
A coupling mechanism with a pressing element acts as an intermediary between the reference star and the incision block. The pressing element applies continuous contact force to maintain the reference element against the slit walls, preventing the reference star from shifting due to wear or clearance. This intermediary coupling ensures positioning accuracy throughout the service life of the device.
Solution Approach 2:
The coupling mechanism is designed to preliminarily establish and maintain a secure connection before and during the surgical procedure. The pressing element is pre-configured to apply contact force that prevents any potential misalignment from occurring during use, rather than correcting misalignment after it occurs.
2Ease of operation
If plates are used for positioning, then positioning is enabled, but wear and clearance cause excessive movement of reference star
Solution Approach 1:
The pressing element serves as a mediator that transmits contact force from the reference element to the slit walls. This continuous contact force eliminates gaps and clearance that would otherwise allow the reference star to move independently of the incision block, thereby maintaining measurement precision while preserving ease of operation.
Solution Approach 2:
The patent replaces a simple mechanical insertion system with a more sophisticated coupling mechanism that incorporates active pressing elements. This substitution transforms a passive positioning system into an active one that continuously maintains contact, preventing wear-induced misalignment.
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 solution enhances the accuracy of incision plane positioning by maintaining a consistent positional relationship between the reference star and incision block, reducing the impact of wear and allowing for precise navigation of surfaces during surgical procedures.
Implementation Method 1
at least one pressing element (14a, 14b... 14e), biased by a spring (12), to maintain contact with the reference element (13a, 13b... 13f)
Implementation Method 2
Spherical markers 22a, 22b, 22c, each having a reflective surface, are coupled to the arms, wherein two infrared cameras (not shown) detect infrared light reflected on the spherical markers 22a, 22b, 22c
Data Source
AI summary
The invention relates to a device for determining the position of a plane or recess of an instrument. The device includes a positioning element that has at least one reference marker, wherein a spatial position of the positioning element can be ascertained, and a position determining element coupled to the positioning element. The position determining element includes at least one reference element that defines a contact plane, and at least one pressing element.