Syringe Operation Detection Device for Objective Force Evaluation
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Solution Overview
Problem
It is challenging to objectively assess the power applied to a syringe plunger during blood collection or drug administration, as it depends on individual hand feel, making it difficult for experienced professionals to teach beginners and evaluate the appropriateness of the operation, especially since frictional forces vary by syringe manufacturer and size.
Innovation Solution
A syringe operation detection device with a female joint part, male joint part, and a coupling container that includes a pressure, flow rate, or flow velocity sensor, along with a controller to determine if the operation meets predetermined criteria, providing feedback through light, image, or sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a load sensor is used to measure the power applied to a plunger, then the power application can be measured, but it is impossible to determine whether an appropriate drawing force or injection force is being applied due to variations in frictional force between syringe barrel and plunger depending on manufacturer and size
Solution Approach 1:
The patent introduces a fluid medium (saline solution or air) as an intermediary between the plunger and the measurement system. Instead of directly measuring the frictional force between plunger and barrel, the system measures the pressure or flow rate of the fluid that transmits the force. This intermediary approach eliminates the problem of varying frictional forces because the fluid pressure/flow rate directly reflects the plunger movement characteristics without being confounded by syringe-specific friction variations.
Solution Approach 2:
The patent replaces the direct mechanical measurement system (load sensor measuring plunger force) with a fluid-based measurement system (pressure sensor or flow rate sensor measuring fluid properties). This substitution transforms the measurement from directly sensing mechanical friction to sensing fluid dynamics, which are more consistent and less affected by syringe manufacturing variations.
2Ease of manufacture
If practice syringes are manufactured dedicated for practice use, then practice can be performed, but the practice outcome cannot be successfully made use of since various syringes need to be used in medical facilities
Solution Approach 1:
The detection device is designed with universal adaptability to work with various syringe types. The coupling container can accommodate different syringe barrel dimensions, and the sensor system can measure fluid pressure/flow rate regardless of the specific syringe model. This allows the same detection device to be used across different syringes in medical facilities, making practice outcomes transferable to real medical scenarios.
Solution Approach 2:
The detection device creates a measurement system that copies the essential operational characteristics of various syringes without requiring practice syringes to be identical to medical syringes. By measuring fluid pressure and flow rate, the system captures the key operational parameters that are consistent across different syringe types, allowing practice with one syringe to transfer to others.
3Measurement precision
If frictional force between syringe barrel and plunger is measured, then power application can be quantified, but the measurement varies depending on syringe manufacturer and size making objective evaluation impossible
Solution Approach 1:
The patent changes the measurement parameter from direct mechanical friction force to fluid pressure or flow rate. These fluid parameters are less sensitive to syringe manufacturing variations and size differences. The pressure sensor measures the pressure exerted by the fluid during plunger movement, while the flow rate sensor measures the fluid flow characteristics, both of which provide consistent measurements across different syringe types.
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
Enables objective evaluation of syringe operations, allowing for the detection of appropriate drawing or injecting states, facilitating training and ensuring accurate medical procedures by providing real-time feedback on the operator's technique.
Implementation Method 1
the detector detecting a pressure, flow velocity, or flow rate of a fluid moving between the syringe barrel and the syringe needle
Implementation Method 2
the detector detecting a pressure, flow velocity, or flow rate of a fluid moving between the syringe barrel and the syringe needle
Implementation Method 3
the detector detecting a pressure, flow velocity, or flow rate of a fluid moving between the syringe barrel and the syringe needle
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3
AI summary
Provided is a syringe operation detection device 1 for detecting a drawing or injecting operation of a plunger 120 in a syringe 100. A female joint part 52 is joined to a barrel tip 116 of the syringe 100, a male joint part 60 is joined to a needle hub 132 of a syringe needle 130, and a coupling container 70 is placed between the female joint part 52 and the male joint part 60, for allowing them to be continuous with each other while being closed externally. A detector for detecting a pressure, flow velocity, or flow rate of a fluid moving therein is placed in any one of the coupling container 70, the female joint part 52, and the male joint part 60. As a result, there is provided the syringe operation detection device capable of being applied to a syringe actually used and evaluating a drawing or injecting state in objective terms.