Medical Probe Cuff Pressure Management via Respiration Synchronization
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Solution Overview
Problem
Existing intubation probes with inflatable cuffs can cause injuries due to prolonged pressure on blood circulation pathways and excessive inflation, and the use of metallic threads for probe formation can damage tissues during insertion.
Innovation Solution
A medical probe with an inflatable cuff that inflates during inspiration and deflates during expiration, using air flow to manage pressure and prevent tissue damage, along with a flexible guide thread for molding and visibility, and additional conduits for suctioning secretions to prevent clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cuff is inflated throughout the intubating period to fix the probe, then the probe remains securely fixed, but blood circulation in the region is stopped causing injuries to the patient
Solution Approach 1:
The cuff is inflated and deflated periodically synchronized with the patient's respiration cycle. During inspiration, the cuff inflates to secure the probe; during expiration, it deflates to allow blood circulation. This periodic action maintains probe fixation while preventing continuous compression of blood vessels, thereby resolving the contradiction between stable fixation and blood circulation preservation.
2Shape
If a metallic thread is inserted into the probe tube to conform it, then the probe can be shaped correctly, but the metallic thread may damage organs or tissues if it exceeds the tube length
Solution Approach 1:
The harmful metallic thread is extracted from the probe tube after serving its conformation purpose. The probe is designed with a balloon cuff that can be inflated and deflated, eliminating the need for a metallic thread to maintain shape. This extraction removes the source of potential tissue damage while preserving the probe's ability to conform to the required shape during insertion.
3Stability of the object's composition
If the cuff is excessively inflated to ensure secure fixation, then the probe remains firmly fixed, but injuries to the patient are caused by excessive pressure
Solution Approach 1:
The cuff system transitions from a static inflated state to a dynamic system that alternates between inflation and deflation based on respiration phase. The cuff inflates during inspiration to provide secure fixation, then deflates during expiration to reduce pressure on tissues. This dynamic behavior allows the probe to maintain firm fixation while preventing excessive pressure injuries through periodic pressure reduction.
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 probe reduces the risk of injury by managing cuff pressure with natural respiration rhythms, preventing tissue damage from metallic threads, and maintaining airway patency, while allowing for effective suctioning of secretions to maintain airflow.
Implementation Method 1
a first cuff (3) arranged around the tube (1) in a region of its external wall, said first cuff being inflatable by means of a first conduit (5) located at the tube wall
Implementation Method 2
The probe is further provided with means (4) that provide the tube (1) with an elastic memory, located on the tube wall
Data Source
AI summary
A probe for medical use comprising a tube (1) and a cuff (3) located around the tube (1) in a region of its external wall, the cuff (3) being inflatable through a conduit (5) arranged at the wall of the tube (1), linking the interior of the tube (1) to the interior of the cuff (3), the inflation and deflation of the cuff (3) being determined by the rhythms of the inspiration and expiration of air, respectively.