Pulsatile Perfusion Control for Whole-Body Resuscitation
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Solution Overview
Problem
Existing methods for treating hemorrhages and other medical conditions in mammalian circulatory systems are inadequate in restoring blood volume and maintaining organ perfusion, often leading to increased risk of vascular injury and cellular damage.
Innovation Solution
A perfusion system that includes a reservoir, cannula, fluid line, pressure and flow sensors, and a pulse generation system to deliver pulsatile flow of perfusate through a single entry point, controlled by vital sign sensors to maintain physiological parameters and administer therapeutic compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing methods are used to treat hemorrhages, then treatment can be provided, but blood volume restoration is inadequate and organ perfusion cannot be maintained
Solution Approach 1:
The system employs a pulse generation system that delivers pulsatile flow of perfusate through the cannula, mimicking natural cardiac function. This periodic action creates pressure waves that effectively distribute perfusate throughout the circulatory system, restoring blood volume and maintaining organ perfusion more effectively than continuous flow methods
2Stress or pressure
If aggressive perfusion is used to restore blood volume, then blood pressure can be increased, but vascular injury risk increases
Solution Approach 1:
The system incorporates pressure sensors and flow sensors that continuously monitor circulatory parameters and provide feedback to the pulse generation system. This feedback mechanism allows the system to dynamically adjust pulse amplitude and frequency to maintain blood pressure within safe ranges, preventing vascular injury while effectively restoring perfusion
Solution Approach 2:
The pulse generation system dynamically adjusts its operation based on real-time physiological conditions. By varying pulse characteristics according to patient needs and circulatory status, the system can effectively raise blood pressure when needed while avoiding excessive pressure that would cause vascular damage
3Device complexity
If simple perfusion systems are used, then device complexity is reduced, but oxygen transfer rates cannot be maintained
Solution Approach 1:
The perfusion system integrates multiple functions into a unified platform: the pulse generation system handles flow dynamics, while vital sign sensors monitor physiological parameters, and the control system coordinates oxygen delivery. This multi-functional integration maintains oxygen transfer rates without requiring separate complex systems for each function
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 system effectively restores blood pressure and volume, reduces vascular injury risk, and maintains oxygen transfer rates, enabling prolonged resuscitation and metabolic support for patients with hemorrhages or other conditions.
Implementation Method 1
a pulse generation system. The pulse generation system includes a pulse generator configured to generate pulsatile flow of perfusate from the reservoir to the cannula along the fluid line
Implementation Method 2
a pressure sensor configured to measure pressure along the fluid line
Implementation Method 3
a flow sensor configured to measure a flow rate along the fluid line
Implementation Method 4
the system further includes a heat exchanger configured to control a composition of gasses within the perfusate
Data Source
AI summary
A perfusion system for treatment of a patient experiencing at least one medical condition includes a reservoir configured to receive perfusate, a cannula configured to fluidly couple the reservoir to an arterial blood vessel of a mammal through a single entry point, a fluid line fluidly coupling the reservoir to the cannula, a pressure sensor configured to measure pressure along the fluid line, a flow sensor configured to measure a flow rate along the fluid line; and a pulse generation system. The pulse generation system includes a pulse generator configured to generate pulsatile flow of perfusate from the reservoir to the cannula along the fluid line based on one or more signals generated by at least one of the pressure sensor or the flow sensor. The perfusion system is configured to perfuse an entire circulatory system of the mammal to treat a patient experiencing at least one medical condition.