Frequent Pleural Fluid Removal for Outpatient Management
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Solution Overview
Problem
Current methods for treating pleural effusion are inadequate in providing quick and effective relief from symptoms, as they often result in prolonged treatment times, high recurrence rates, and unsatisfactory success rates, especially for outpatient treatments, due to the rapid re-accumulation of fluid in the pleural space.
Innovation Solution
A method involving frequent fluid removal treatments from the pleural space, administered every 12 to 72 hours, with each treatment removing progressively less fluid until two consecutive treatments remove less than 300 mL, utilizing devices like pleural catheters, and potentially incorporating pleurodesis treatments to promote adhesion between pleural layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fluid removal frequency is increased to every 12-72 hours, then symptom relief speed and treatment effectiveness improve, but treatment complexity and patient burden increase
Solution Approach 1:
The patent applies preliminary action by performing multiple fluid removal treatments at frequent intervals (every 12-72 hours) before the pleural space can re-accumulate significant fluid. This proactive approach prevents rapid re-accumulation from compromising treatment effectiveness, allowing the pleural layers to adhere properly during the critical early period after fluid removal.
Solution Approach 2:
The patent implements periodic action through scheduled fluid removal treatments at regular intervals of every 12-72 hours. This systematic periodic intervention maintains therapeutic effect by preventing fluid re-accumulation while creating a manageable treatment schedule that balances efficacy with patient burden.
2Reliability
If fluid removal amount is limited to less than 300 mL per treatment, then recurrence rate decreases and treatment success improves, but total treatment time increases
Solution Approach 1:
The patent applies segmentation by dividing the total fluid removal into multiple small sessions of less than 300 mL each, performed frequently rather than removing large volumes in single sessions. This segmented approach allows the pleural space to heal and adhere between treatments, preventing recurrence while systematically reducing total fluid burden over time.
Solution Approach 2:
The patent uses partial action by removing only small amounts (less than 300 mL) of fluid per treatment session, which is insufficient for complete drainage but optimal for promoting pleural adhesion and preventing recurrence. This controlled partial removal strategy prioritizes long-term success over rapid complete drainage.
3Reliability
If pleurodesis is incorporated to promote adhesion, then recurrence prevention improves, but procedure complexity and potential complications increase
Solution Approach 1:
The patent uses an intermediary approach by incorporating pleurodesis agents (chemical or mechanical) that facilitate adhesion between pleural layers. These intermediaries promote permanent closure of the pleural space, preventing recurrence, while the frequency-limited treatment schedule minimizes exposure to potential complications.
Data Source
AI summary
The present invention provides methods of treating pleural effusion in a subject, comprising removing fluid from the pleural space at an increased frequency, as compared to previous methods.