Arthroscopic Positioning Instrument for Stable Drilling
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Solution Overview
Problem
Conventional arthroscopic surgical instruments are difficult to use for small joints due to size limitations, causing instability and increased risk of intersecting suture paths during drilling, leading to prolonged surgery times.
Innovation Solution
An arthroscopic positioning instrument with a handle featuring a finger holding member, palm holding member, and connecting members, allowing for stable grip and clear visibility of the drilling area, including an arched guiding groove and adjustable connecting tubes to ensure accurate and non-intersecting suture paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the conventional surgical positioning instrument is made small for wrist joint surgery, then the instrument can be used for small joints, but the operator cannot properly hold it and the drilling operation becomes difficult
Solution Approach 1:
The positioning instrument is divided into distinct functional segments: a handle assembly for operator control, a positioning member for locating the bone, and a guiding cylinder for drill alignment. This segmentation allows each component to be optimized independently - the handle can be sized for comfort while the positioning member remains compact for small joint access.
2Volume of moving object
If the operator holds the small positioning instrument with fingers, then the instrument can be used for small joints, but the operator's hand cuts off the view of the drilling hole
Solution Approach 1:
The instrument design allows the positioning member to engage the bone surface while the handle extends away from the surgical site. This intermediary arrangement enables the operator to hold the handle at a distance that does not obstruct the visual field of the drilling area, solving the visibility problem while maintaining instrument functionality.
3Manufacturing precision
If the operator carefully drills in a very small area to prevent suture path intersection, then the drilling precision can be maintained, but the surgery time is prolonged
Solution Approach 1:
The positioning member is pre-positioned on the bone surface to establish the correct drilling location before the drilling operation begins. The guiding cylinder is pre-aligned to define the exact trajectory. This preliminary positioning ensures that subsequent drilling operations are precise and efficient, reducing the need for repeated attempts and minimizing surgery time.
Solution Approach 2:
The instrument replaces manual drilling guidance with a mechanical guidance system consisting of the guiding cylinder and positioning member. This mechanical system objectively defines the drilling path and prevents suture path intersection through its physical structure, eliminating the need for careful manual judgment and reducing drilling errors.
4Area of stationary object
If the conventional positioning instrument is used for small joints, then it can access small areas, but even slight shaking causes improper drilling operation
Solution Approach 1:
The handle assembly is designed with an asymmetric grip configuration where the thumb rest and finger grips are positioned to provide stable hand control. This asymmetric design creates a natural hand posture that minimizes shaking and provides mechanical stability during drilling operations in small joints.
Data Source
AI summary
An arthroscopic positioning instrument is provided to overcome the problem of inconvenient operation of the modern arthroscopic positioning instrument. The arthroscopic positioning instrument includes a handle, a positioning member and a guiding cylinder is disclosed. The handle includes a finger holding member, a palm holding member and at least one connecting member. The palm holding member is connected to the finger holding member via the at least one connecting member. The finger holding member includes one end provided with an engaging portion and an arched guiding groove. The palm holding member does not intrude into a maximum axial range of the engaging portion. The positioning member includes an arched end and a hook end. The arched end is received in the arched guiding groove. The guiding cylinder is coupled with the engaging portion of the finger holding member.