Floating-Seal Medical Puncturing Device for Precise Needle Placement
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Solution Overview
Problem
Existing medical devices for injecting medication into the suprachoroidal space lack precision in needle placement and stability in injection speed, relying heavily on manual skill which can lead to inconsistent results.
Innovation Solution
A medical puncturing device with a syringe barrel, floating seal, and needle base that allows for precise control of needle depth and steady injection, featuring a system with a syringe barrel, floating seal, and needle base that enables elastic engagement and advancement, along with a flowable composition lumen for controlled delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a regular syringe is used for injection into the suprachoroidal space, then the device complexity is low, but the manufacturing precision of needle placement is insufficient
Solution Approach 1:
The device is divided into distinct functional modules: a needle assembly with depth control mechanism, a syringe barrel with volume markings, and a plunger assembly with ratchet mechanism. Each module independently contributes to precision while maintaining overall device manageability.
Solution Approach 2:
The needle depth is pre-determined by the length of the needle protruding from the hub before insertion. The hub includes depth indicators that are set in advance, allowing the operator to select the appropriate needle extension length based on patient anatomy without requiring complex real-time adjustments during the procedure.
2Reliability
If manual control of the plunger is used, then the device complexity is low, but the stability of injection speed is insufficient
Solution Approach 1:
The syringe barrel includes volume markings that provide visual feedback to the operator about the amount of medication remaining and injected. This allows for controlled delivery by monitoring the volume changes during injection.
Solution Approach 2:
The ratchet mechanism on the plunger allows for periodic, controlled advancement of the plunger in discrete increments. This prevents continuous uncontrolled movement and enables steady, manageable injection speeds by advancing the plunger in controlled steps rather than continuous pressure.
3Measurement precision
If manual determination of needle depth by medical personnel is used, then the device complexity is low, but the measurement precision of needle depth is insufficient
Solution Approach 1:
The needle depth is pre-determined by the length of the needle protruding from the hub before insertion. The hub includes depth indicators that are set in advance, allowing the operator to select the appropriate needle extension length based on patient anatomy without requiring complex real-time adjustments during the procedure.
Solution Approach 2:
The device replaces manual estimation and experience-based depth determination with a mechanical measurement system. The hub includes depth indicators and the needle assembly has marked length increments, transforming the subjective manual assessment into an objective mechanical measurement that can be directly read from the device.
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 achieves precise needle placement and steady injection, ensuring accurate delivery of medication to the suprachoroidal space or other tissue voids, cavities, or vessels, with defined volume control.
Implementation Method 1
the floating seal and the needle base are configured to elastically engage each other
Data Source
AI summary
A medical puncturing device and a system comprising medical apparatuses configured to be assembled into the medical puncturing device. The device or system comprises: a syringe barrel (1) comprising a distal closed end and a proximal open end; an elastic movement unit comprising an actuation member (2) and a floating seal (3) inside the syringe barrel (1), where the actuation member (2) and a floating seal (3) are capable of forming an elastic connection such that the actuation member (2) and floating seal (3) are capable of moving forward and backward relative to one another; a hollow puncture needle (6) fixedly connected to the actuation member (2) and proximal to the floating seal (3), where the hollow puncture needle (6) comprises a needle distal opening (6a) and a needle body opening (6b); and a flowable composition lumen (7) enclosed by the syringe barrel distal closed end, an inner wall of the syringe barrel, and the floating seal (3). The device or system is configured to advance the hollow puncture needle (6) distally. Prior to use, the needle distal opening (6a) can be proximal to the floating seal (3), within the floating seal (3), between the floating seal (3) and a distal seal (8) at the syringe barrel distal closed end, within the distal seal (8), or distal to the distal seal (8). The hollow puncture needle (6) is advanced through the floating seal (3) and the syringe barrel distal closed end, thereby connecting the flowable composition lumen (7), the needle body opening (6b), and the needle distal opening (6a). The present disclosure enables injection, access, expansion, and/or device implantation in an apparent or potential tissue void, cavity, or vessel, and is especially useful for achieving precise control of puncturing depth and needle placement, as well as steady injection and injection of a defined volume.