Closed Arterial Blood Collection With Saline Flush Blood Return
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing arterial blood collection systems generate thrombus and interfere with pulse signal accuracy, leading to significant blood loss and anemia in ICU patients, and are not compatible with existing blood collection apparatus.
Innovation Solution
A closed type arterial blood collection apparatus with a saline bag, three-way valves, a guide tube, and a fluid conveying means, including a pump and pressure accumulation unit, to collect and transfuse initial blood without loss, ensuring thrombus-free operation and accurate pulse monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If initial blood is stored in an external reservoir, then blood loss is reduced, but thrombus generation occurs
Solution Approach 1:
The patent extracts the problematic reservoir component from the blood collection system. Instead of storing initial blood in an external reservoir, the system allows initial blood to mix with saline in the A-line and flushes it directly back to the patient, eliminating the reservoir that causes thrombus generation while maintaining blood conservation benefits
Solution Approach 2:
The patent introduces saline solution as an intermediary substance. Saline mixes with initial blood in the A-line, creating a flushable mixture that prevents thrombus formation while carrying blood components back to the patient. The saline acts as a mediator between blood collection and blood return
2Quantity of substance
If a reservoir is installed between catheter and transducer, then blood can be stored, but pulse signal accuracy deteriorates
Solution Approach 1:
The patent removes the reservoir from the monitoring pathway between catheter and transducer. By eliminating this intermediate component, pulse signals travel directly from the arterial line to the transducer without damping or distortion, maintaining measurement accuracy while still enabling blood conservation through the saline flush mechanism
Solution Approach 2:
The patent separates blood collection function from blood monitoring function. Blood conservation is achieved through the saline flush system, while pulse monitoring maintains accuracy by keeping the monitoring pathway free of interfering components like reservoirs
3Productivity
If initial blood is transfused under pressure, then blood is returned to patient, but thrombus generation increases
Solution Approach 1:
The patent maintains continuous saline flushing during the blood return process. The saline continuously mixes with and flushes blood components back to the patient, preventing thrombus formation even under pressure. This continuous action ensures thrombus prevention throughout the entire blood return process
Solution Approach 2:
The patent changes the physical state of blood by mixing it with saline solution. This parameter change (from pure blood to blood-saline mixture) reduces viscosity and prevents coagulation, allowing safe pressurized return of blood components to the patient
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
Prevents thrombus formation and maintains pulse signal integrity, minimizing blood loss and anemia while being compatible with existing systems.
Implementation Method 1
a pump configured to press an outer circumferential surface of the guide tube in a longitudinal direction thereof in order to push the blood in the guide tube in the longitudinal direction of the guide tube
Implementation Method 2
The pump is a peristaltic pump configured to press an outer circumferential surface of the guide tube in a longitudinal direction thereof
Implementation Method 3
a pressure accumulation unit configured to accumulate inner pressure of the guide tube increasing as the result of operation of the pump
Data Source
AI summary
A closed type arterial blood collection apparatus is disclosed. The closed type arterial blood collection apparatus includes a saline bag provided at a lower end thereof with a first port and a second port, an A line configured to connect an arterial blood vessel of a patient to the first port, a first three-way valve configured to open and close the A line, a blood collection unit configured to collect arterial blood through the first three-way valve, a second three-way valve provided between the first three-way valve and the first port, the second three-way valve being configured to open and close the A line, a guide tube configured to connect the second three-way valve to the second port, and a fluid conveying means configured to convey a fluid in the guide tube when the A line and the guide tube are connected to each other.