Needle Insertion Assistance Device with Depth Blocking
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Solution Overview
Problem
Existing methods for inserting needles into human body parts, such as the epidural space, face challenges in precise control and stability, often leading to unintentional advancement into sensitive areas like the subarachnoid space or spinal cord, due to lack of effective handling and control mechanisms.
Innovation Solution
A needle insertion assistance device with a supporting plate, base, syringe holder, needle blocker, handle, and angle adjusting assembly that stabilizes the needle and prevents over-advancement by blocking the needle's forward movement and allowing controlled insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the needle is held directly by one or two human hands, then the needle can be inserted into the epidural space, but it is easy to unintentionally advance the needle through the epidural space into the subarachnoid space or spinal cord due to sudden patient movement or too much advancement
Solution Approach 1:
The patent introduces a depth controller device as an intermediary between the operator's hands and the needle. This device includes a blocking member that can be positioned to prevent the needle from advancing beyond a predetermined depth, thereby providing reliable control while maintaining ease of operation
Solution Approach 2:
The depth controller is prepared in advance with the blocking member positioned at the desired insertion depth before the needle insertion procedure begins. This preliminary setup ensures that the needle cannot accidentally advance too far, even if the operator applies excessive force or the patient moves suddenly
2Reliability
If a depth controller with a screw blocking mechanism is used to prevent over-advancement, then needle advancement can be controlled, but the device itself can be easily advanced forward together with the needle, causing unintentional over-advancement
Solution Approach 1:
The patent introduces a stationary support structure as an intermediary between the depth controller and the needle. The blocking member engages with this stationary structure, preventing the entire device from being inadvertently advanced forward while maintaining reliable needle depth control
Solution Approach 2:
The patent separates the blocking function from the support function by extracting the blocking member as a distinct component that can be independently positioned and locked, preventing it from moving with the needle while the support structure remains stationary
3Manufacturing precision
If the epidural space is very narrow, then precise needle placement is required, but the needle can be unintentionally advanced through the epidural space into the subarachnoid space
Solution Approach 1:
The patent applies preliminary anti-action by positioning the blocking member before needle insertion to counteract any potential over-advancement force. The blocking member is pre-positioned at the correct depth to prevent the needle from entering the subarachnoid space, even if excessive force is applied during insertion
Data Source
AI summary
A needle insertion assistance device is provided to easily hold a needle device, which comprises a syringe and a needle having a needle wing and being attached to the syringe, in order to more reliably control the advancement of the needle during insertion of the needle into a targeted part of a human body for many medical purposes. One embodiment of the needle insertion assistance device may comprise a supporting plate, a base connected hingedly to a rear surface of the supporting plate, and a syringe holder securely affixed to a top surface of the base to slidably hold the syringe on the base and prevent the syringe from moving from side to side. This embodiment of the needle insertion assistance device may further include a needle blocker, a handle, and an angle adjusting assembly.