Negative Positive Pressure Therapy Device Edema Prevention
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Solution Overview
Problem
Continuous application of negative pressure in existing negative pressure therapy devices can lead to edema, as they fail to maintain the necessary pressure gradient for effective treatment without causing ischemic conditions, prompting the need for an alternative approach that incorporates positive pressure to prevent and reverse edema.
Innovation Solution
The integration of a positive pressure system into a conventional negative pressure, thermal energy therapy device, allowing for intermittent application of positive pressure in conjunction with negative pressure to promote vasodilation and prevent edema, which can be atmospheric or hyperbaric pressure applied before, after, or between negative pressure intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous negative pressure is applied in conventional negative pressure therapy devices, then vasodilation is achieved, but edema occurs due to loss of pressure gradient
Solution Approach 1:
The patent implements periodic alternation between negative pressure and positive pressure phases. During negative pressure phases, vasodilation is promoted; during positive pressure phases, edema is prevented by restoring pressure gradient. This periodic action resolves the contradiction by temporarily switching pressure modes to achieve both therapeutic benefits while avoiding harmful effects.
Solution Approach 2:
The patent dynamically changes pressure parameters by switching between negative and positive pressure states. The pressure magnitude and duration are adjusted to optimize vasodilation during negative pressure phases while preventing edema during positive pressure phases. This parameter modulation resolves the contradiction between achieving treatment efficacy and avoiding edema.
2Use of energy by moving object
If negative pressure is maintained to promote vasodilation, then thermal energy transfer is enhanced, but ischemic conditions may occur
Solution Approach 1:
The patent uses periodic alternation between negative pressure (enhancing thermal energy transfer through vasodilation) and positive pressure (preventing ischemic conditions by restoring perfusion pressure). This temporal modulation allows the system to achieve enhanced thermal energy transfer while periodically preventing ischemic complications.
Solution Approach 2:
The patent applies positive pressure in advance or between negative pressure phases to counteract potential ischemic effects before they occur. This preliminary anti-action prevents blood flow termination that could lead to ischemia, while still allowing negative pressure phases to enhance thermal energy transfer during vasodilation.
3Reliability
If hard seal is used to maintain negative pressure, then vacuum tightness is achieved, but tourniquet effect occurs terminating blood flow
Solution Approach 1:
The patent implements periodic alternation between negative pressure phases (requiring vacuum-tight sealing for effective treatment) and positive pressure phases (where the seal becomes less restrictive, allowing blood flow restoration). This temporal separation resolves the contradiction by allowing hard sealing during negative pressure while preventing tourniquet effect during positive pressure recovery phases.
Solution Approach 2:
The patent dynamically adjusts seal characteristics and pressure levels. The seal maintains vacuum tightness during negative pressure phases but allows increased permeability or pressure equalization during positive pressure phases, preventing tourniquet effect. This dynamic adaptation resolves the contradiction between maintaining seal integrity and preventing blood flow termination.
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
This combination of negative and positive pressure therapy effectively reduces the risk of edema and enhances the treatment efficacy by maintaining a balanced pressure gradient, ensuring effective vasodilation and thermal energy transfer while minimizing the risk of ischemic conditions.
Implementation Method 1
a vacuum system that creates a negative pressure in the enclosure
Implementation Method 2
The integration of a positive pressure system into a conventional negative pressure, thermal energy therapy device, allowing for intermittent application of positive pressure
Implementation Method 3
a thermal energy system having a thermal energy contacting element wherein the venous plexus area is supposed to contact the thermal energy contacting element
Implementation Method 4
a seal positioned at the enclosure's opening to maintain the negative pressure in the enclosure
Data Source
AI summary
A negative/positive pressure, thermal energy therapy device is described in this application. The present invention uses a conventional negative pressure, thermal energy device and/or an alternative embodiment thereof and adds a significant modification. The modification is that positive pressure, not just ambient pressure, is at least occasionally applied to the patient's body contained in the negative pressure, thermal energy device.