Haemostatic Spray Nozzle Assembly for Blood-Resistant Wound Coverage
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Solution Overview
Problem
Existing methods for applying surgical haemostatics to target sites, particularly haemorrhages, are inefficient and prone to having the haemostatic material flushed away by flowing blood, making it difficult to achieve effective and rapid haemostasis without manual pressure.
Innovation Solution
A sprayable applicator that delivers haemostatic paste as a spray through a nozzle assembly, utilizing a pressure generating unit to create a spray of microparticles that adhere to the wound and surrounding area, ensuring coverage and coagulation without manual compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If haemostatic paste is applied via syringe tip extrusion, then spatial precision is improved, but the haemostatic material is flushed away by flowing blood requiring manual compression
Solution Approach 1:
The patent changes the physical state and delivery parameters of the haemostatic material from high-viscosity paste to aerosolized spray droplets. This parameter change allows the material to be delivered without manual compression while maintaining retention, as the spray forms a conformal coating that adheres to the tissue surface
Solution Approach 2:
The patent replaces the mechanical extrusion system (syringe and plunger) with a pneumatic spray delivery system. The spray mechanism uses pressurized gas to atomize and deliver the haemostatic material, eliminating the need for manual compression while achieving reliable haemostatic retention
2Reliability
If manual compression is applied to fix haemostatic, then haemostatic retention is improved, but surgery procedure is interrupted
Solution Approach 1:
The spray-delivered haemostatic material is self-retaining, forming a conformal coating that adheres to the tissue surface without requiring external compression. The material's ability to self-form and self-adhere eliminates the need for manual intervention to maintain retention, allowing continuous surgical procedure
3Reliability
If pad or wound dressing is applied to stop bleeding, then haemostatic retention is improved, but application becomes difficult in laparoscopy
Solution Approach 1:
The patent replaces the mechanical pad/dressing application system with a spray delivery system that can reach target sites through narrow access channels. The spray mechanism can deliver haemostatic material to difficult-to-access areas without requiring physical manipulation of pads or dressings, significantly improving ease of operation in laparoscopic procedures
4Area of stationary object
If haemostatic paste is applied as blobs, then coverage is achieved, but uniform density over large area is not achieved
Solution Approach 1:
The patent segments the haemostatic material into fine aerosolized droplets that can be uniformly distributed over large areas. The atomization process divides the material into numerous small particles that conform to the tissue surface, achieving both large coverage area and uniform density distribution
Solution Approach 2:
The patent changes the delivery parameters from discrete paste blobs to continuous aerosol spray. This parameter change enables uniform distribution of material over large areas while maintaining consistent density, as the spray delivers a continuous stream of fine droplets that evenly coat the target surface
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 applicator provides rapid and effective haemostasis by creating a uniform layer of haemostatic paste that adheres to the wound, preventing flushing and allowing for faster bleeding cessation with improved spatial precision.
Implementation Method 1
a pressure generating unit at a proximal end of the delivery tube for forcing the paste out of the container, into and through the delivery tube, to generate a spray pressure at a proximal end of the nozzle assembly
Implementation Method 2
a nozzle assembly at a distal end of the delivery tube for delivering the paste as a spray, preferably as a spray of droplets or of microparticles
Implementation Method 3
The spray of paste will, when deposited on the haemorrhage and on the surrounding non-bleeding area, immediately stick together and stick to the surrounding non-bleeding area because of the high viscosity and the sticky quality of the paste
Implementation Method 4
The haemostatic agent in the paste will immediately start coagulating the blood of the wound
Data Source
AI summary
The invention regards a sprayable patch applicator for delivering a paste from a container, comprising: a delivery tube for connecting at a proximal end to the container, and a nozzle assembly at a distal end of the delivery tube for delivering the paste as a spray, preferably as a spray of droplets.