Dual Check Valve Applicator for One-Handed Hemostatic Delivery
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Solution Overview
Problem
Existing delivery devices for hemostatic materials require two-handed operation, are time-consuming to prepare, result in material wastage, and lack precise control over delivery location and rate, especially for viscous materials.
Innovation Solution
A one-handed delivery device with a trigger mechanism, pusher, valve, and cannula system that allows for controlled delivery of hemostatic materials through a two-way check valve, enabling one-handed operation and reducing material wastage by incorporating a flushing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a stylet is inserted into the back-end of the delivery tube to expel hemostatic material, then the material can be delivered to the bleeding site, but the procedure requires two-handed operation and may leave material in the delivery tube causing waste
Solution Approach 1:
The delivery device is segmented into distinct functional components: a delivery tube for material transport, a stylet for actuation, and a flushing mechanism for cleanup. This segmentation allows each component to perform its specific function efficiently, enabling one-handed operation while minimizing material waste through the flushing capability that removes residual material from the delivery tube.
Solution Approach 2:
The device incorporates a flushing mechanism that allows the delivery tube to clean itself by flushing out residual hemostatic material. This self-service feature eliminates the need for manual cleaning by the surgeon, enabling one-handed operation while preventing material wastage by removing stuck material from the delivery tube.
2Quantity of substance
If viscous hemostatic material is delivered through a syringe, then the material can be applied to the bleeding site, but higher pressure forces are required and manual extrusion is difficult
Solution Approach 1:
The delivery tube is designed with a curved or tapered configuration that reduces resistance to material flow. The curved geometry allows viscous hemostatic material to move more easily through the delivery tube with lower pressure forces, making manual extrusion feasible while maintaining adequate material delivery quantity.
Solution Approach 2:
The device utilizes hydraulic principles by employing a stylet that transmits mechanical force efficiently through the delivery tube. The stylet's design creates a pressure transmission mechanism that amplifies the applied force, enabling easier extrusion of viscous materials compared to direct manual squeezing of a syringe.
3Quantity of substance
If hemostatic material is loaded into the delivery tube by filling via syringe, then the material can be delivered, but the process is time intensive
Solution Approach 1:
The device is designed with a pre-loaded configuration where the delivery tube can be filled with hemostatic material before the surgical procedure. The stylet mechanism is pre-positioned to facilitate quick loading. This preliminary preparation reduces intraoperative time by eliminating the need for time-intensive syringe filling during the procedure.
Solution Approach 2:
The delivery tube is designed with a geometry that replicates the syringe loading process more efficiently. The internal structure of the delivery tube is optimized to allow rapid material transfer from the syringe, reducing the time required for loading while maintaining complete material delivery.
4Ease of operation
If the stylet is inserted to expel hemostatic material, then the material can be delivered, but the stylet may not translate all the way through the delivery tube leaving material in the delivery tube
Solution Approach 1:
The device incorporates a flushing mechanism that extracts residual hemostatic material from the delivery tube by introducing a flushing agent. This extraction capability ensures that the stylet can fully expel material while any remaining material is subsequently removed by the flush, preventing wastage.
Solution Approach 2:
The flushing mechanism extends the useful action of material expulsion by continuously flushing the delivery tube after the stylet retraction. This continuous action ensures complete material delivery while preventing residual material from causing wastage, maintaining the useful function throughout the entire delivery process.
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 provides precise administration of hemostatic materials with reduced preparation time, minimized waste, and improved control over delivery location and rate, enhancing surgical efficiency and reducing material loss.
Implementation Method 1
The delivery device may include a check valve, such as a two-way check valve, a user-selectable stopcock valve, or other related valve mechanisms. The check valve may be configured to allow the composition to flow from the first syringe, through the valve, through the cannula, and out of a distal end of the cannula. The check valve may prevent the composition from flowing back toward the first syringe.
Implementation Method 2
The pusher may include a plurality of teeth, and the trigger mechanism may include a ratchet, the ratchet configured to engage with the plurality of teeth of the pusher. The trigger mechanism may be configured to convert rotational motion into linear motion to actuate the plunger.
Data Source
AI summary
Delivery devices, delivery systems, and related methods, for precise administration of hemostatic compositions are disclosed, which may include a trigger mechanism, a pusher, a valve, and a cannula. The pusher is configured to engage with the trigger mechanism, retain a first syringe, a least by coupling with a plunger of the first syringe. The valve is fluidly coupled to the first syringe. The valve is further configured to engage with a second syringe, in fluid communication with both the valve and the first syringe. The cannula extends distally from and is fluidly coupled to the valve. Activation of the trigger mechanism causes the pusher and the plunger of the first syringe to translate in a distal direction, to expel a composition out of the first syringe, through the valve, through the cannula, and out of a distal end of the cannula.