Trocar Needle Auxiliary Grip for Rotation-Free Insertion
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Solution Overview
Problem
Existing trocar needles are difficult to grip, prone to rotation, and can cause damage due to sliding and rotating, leading to improper insertion and potential harm to patient organs, blood vessels, and nerves, and existing solutions do not adequately address these issues.
Innovation Solution
A trocar instrument with a fastening groove on the outer surface and an auxiliary device featuring a hook and flange structure that allows for stable grip, prevents rotation, and enables easy removal with one hand, while minimizing interference with drainage tubing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a trocar needle is made of metallic material in a cylindrical shape, then the structure is simple and easy to manufacture, but it is difficult to grip when the surgical gloves are stained with body fluid
Solution Approach 1:
The trocar needle is divided into a needle body and a separate auxiliary gripping device. The auxiliary device can be attached to the needle body when gripping is needed and removed when not needed, providing grip enhancement without permanently complicating the needle structure
Solution Approach 2:
An auxiliary gripping device acts as an intermediary between the user's hand and the trocar needle. This device provides the necessary friction and grip while allowing the original simple metallic needle structure to remain unchanged
2Ease of operation
If the trocar needle is made bendable by about 20 to 30 degrees, then convenience is improved when penetrating skin, but the needle is likely to rotate during penetration causing damage to organs, blood vessels and nerves
Solution Approach 1:
The auxiliary gripping device is attached to the trocar needle before penetration to prevent rotation. By securing the needle with this device, the harmful rotational movement is counteracted before it can cause damage to organs, blood vessels, or nerves
Solution Approach 2:
The auxiliary gripping device is attached in advance to the trocar needle to establish control and prevent rotation before the actual penetration occurs. This preliminary securing action ensures safe operation during the bending and penetration process
3Object-affected harmful factors
If the trocar needle is intentionally used in a region covered by wrinkles, such as the armpit, then cosmetic appearance is improved, but the needle may be inserted at an undesired position due to difficulty in control
Solution Approach 1:
The auxiliary gripping device provides preliminary control and stabilization of the trocar needle, preventing unintended movement or rotation that could lead to insertion at undesired positions in difficult-to-access areas like the armpit
Solution Approach 2:
By attaching the auxiliary gripping device before insertion, the user establishes firm control over the needle, enabling precise positioning even in cosmetically sensitive areas with wrinkles or difficult anatomy
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 provides a stable grip, prevents rotation, allows easy removal, and ensures accurate insertion, reducing the risk of damage and improving surgical precision.
Implementation Method 1
capable of applying not only a frictional force but also a push/pull force to the contact surfaces of the gripping fingers
Data Source
AI summary
An auxiliary device for use in a trocar instrument, including a trocar needle having a fastening groove formed on an outer circumferential surface thereof. The auxiliary device includes: a body into which at least a portion of the trocar needle is inserted; and a hook connected to the body and configured to be inserted into the fastening groove of the trocar needle. The hook includes a fixing portion fixed to the body and a coupling portion extending from one end of the fixing portion and configured to be inserted into the fastening groove when the trocar needle is disposed inside the body. A gap is formed between the fixing portion and the coupling portion.