Intracavitary Atomizing Nozzle for Gas-Free Therapeutic Delivery
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Solution Overview
Problem
Existing medical instruments for introducing fluid-like therapeutic substances into body cavities are complex, inefficient in distribution, require gas flow complicating closed cavity applications, and risk substance leakage due to high dead volume and lack of nebulization verification.
Innovation Solution
A medical instrument with a nozzle head and flexible tube, featuring an impact device for atomization without gas addition, ensuring wide atomization angles and small droplet sizes for optimal distribution within body cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional catheter with separate needle and syringe is used for intracavitary injection, then the injection procedure can be performed, but the procedure requires multiple steps (puncture, threading, injection) increasing complexity and time
Solution Approach 1:
The patent combines the needle, syringe, and catheter into a single integrated intracavitary injection device. The needle assembly is permanently coupled to the syringe barrel, which is pre-filled with therapeutic substance, eliminating the need for separate components and manual assembly steps while maintaining the ability to perform puncture, thread, and inject functions.
Solution Approach 2:
The integrated device performs multiple functions: the needle penetrates the cavity wall, the syringe delivers the therapeutic substance, and the catheter provides a pathway for injection. This multi-functional design replaces the conventional separate needle-syringe-catheter system, reducing procedural steps while achieving all necessary injection functions.
2Productivity
If a conventional catheter requires threading through a delivery device before injection, then the injection can be performed, but the procedure time increases and operational complexity increases
Solution Approach 1:
The therapeutic substance is pre-filled into the syringe barrel before the procedure, and the needle is pre-attached to the syringe assembly. This preliminary preparation eliminates the need for threading the catheter through a delivery device during the procedure, reducing both procedure time and operational complexity while ensuring the device is ready for immediate use.
3Reliability
If therapeutic substance is stored in the catheter lumen, then injection is possible, but crystallization may occur reducing reliability
Solution Approach 1:
The device segments the therapeutic substance storage from the injection pathway. The syringe barrel serves as the storage chamber where the therapeutic substance is held in liquid form, while the catheter lumen serves only as the injection pathway. This segmentation prevents prolonged storage in the narrow catheter lumen, reducing the risk of crystallization and maintaining substance stability.
Solution Approach 2:
The syringe barrel acts as an intermediary storage chamber between the external environment and the catheter lumen. By storing the therapeutic substance in the larger-volume syringe barrel rather than the catheter lumen, the device maintains better temperature control and reduces concentration effects that could lead to crystallization, thereby improving injection reliability.
Data Source
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AI summary
The invention relates to a medical instrument (100) for introducing a fluid therapeutic substance into a cavity of a body, the medical instrument (100) comprising: a nozzle (110) having a nozzle head (111) for atomising the fluid therapeutic substance to be introduced; an at least substantially elongate and at least substantially rigid shaft (120), at one end (121) of which the nozzle head (111) is mounted; and a flexible tube (140) which is located inside the elongate shaft (120) and is fluidically connected to the nozzle head (111), the nozzle (110) comprising an impact device (130) which has an impact body (131) located in front of a nozzle opening (112) of the nozzle head (111) at least substantially coaxial with respect to the nozzle opening (112).