Implanted Magnetic Pump for Targeted Brain Tumor Therapy
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Solution Overview
Problem
Current treatments for brain tumors, such as malignant gliomas, are invasive, costly, and often ineffective due to limitations in drug delivery across the blood-brain barrier, development of drug resistance, and severe side effects from systemic chemotherapy, which necessitates a more reliable and targeted method for treating brain tumors.
Innovation Solution
A magnetically controlled pump is implanted into the brain to deliver multiple chemotherapeutic agents directly to the tumor site at a controlled rate, utilizing a flexible polymer pouch with electromagnetic coils to expand and contract, allowing for localized delivery of medication and analysis of cerebral fluid to adjust treatment based on individual patient needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If systemic chemotherapy is used to treat brain tumors, then the treatment can be administered non-invasively, but the delivery across the blood-brain barrier is limited and causes severe side effects
Solution Approach 1:
The invention segments the drug delivery system into two parts: an implanted pump device that stores and delivers chemotherapy agents locally at the tumor site, and a separate reservoir system. This segmentation allows the pump to be implanted minimally invasively while achieving reliable local delivery through the blood-brain barrier via direct tumor injection, resolving the contradiction between non-invasive administration and delivery effectiveness.
Solution Approach 2:
The implanted pump acts as an intermediary device between the external control system and the tumor site. It receives control signals remotely, stores chemotherapy agents, and delivers them directly to the tumor through implanted catheters, thereby achieving both non-invasive operation and reliable delivery effectiveness.
2Reliability
If surgery is performed to remove the tumor, then the mass effect can be reduced and tissue diagnosis obtained, but the procedure is invasive and cannot cure the malignant tumor
Solution Approach 1:
The invention replaces the mechanical surgical removal approach with a chemical therapy delivery system. Instead of physically removing the tumor through invasive surgery, the system uses an implanted pump to deliver chemotherapy agents directly to the tumor site, achieving tumor treatment through chemical means rather than mechanical removal, thereby reducing surgical invasion and damage.
3Ease of operation
If radiation is used to treat the tumor, then the treatment can be administered non-invasively, but the brain can only be radiated so much without developing severe sequelae
Solution Approach 1:
The implanted pump serves as an intermediary that enables prolonged non-invasive chemotherapy delivery. It can be programmed to deliver multiple chemotherapy agents over extended periods (weeks to months), providing durable treatment effect without the cumulative damage limits of radiation therapy.
Solution Approach 2:
The pump system enables continuous or prolonged chemotherapy delivery through the blood-brain barrier, maintaining treatment effectiveness over time without the severe sequelae that limit radiation therapy. The system can operate continuously or in cycles for extended durations, providing sustained therapeutic action.
4Reliability
If local intratumoral therapy is used, then the drug delivery can be targeted, but the spread of chemotherapy is limited to the injection site and some adjacent normal brain
Solution Approach 1:
The implanted pump system provides multi-functional delivery capabilities: it can inject chemotherapy agents through multiple catheters positioned at different locations within the tumor, and the system can be programmed to deliver different agents at different rates. This multi-functionality expands the effective delivery coverage area while maintaining targeted delivery, resolving the contradiction between targeted delivery and delivery coverage.
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 approach enables continuous, targeted medication delivery with reduced side effects, improved efficacy, and the ability to monitor and adjust treatment in real-time, enhancing the effectiveness of chemotherapy while minimizing exposure to normal tissues and avoiding the limitations of traditional treatments.
Implementation Method 1
A magnetically controlled pump is implanted into the brain to deliver multiple chemotherapeutic agents directly to the tumor site at a controlled rate, utilizing a flexible polymer pouch with electromagnetic coils to expand and contract
Implementation Method 2
The pouch is alternately expanded and contracting by magnetic solenoid. When contracted, a medicating agent is pushed out of the pouch through a plurality of needles. When the pouch is expanded, surrounding cerebral fluid is drawn into the space between the double walls of the pouch
Data Source
AI summary
A magnetically controlled pump is implanted into the brain of a patient and delivers a plurality of medicating agents at a controlled rate corresponding to the specific needs of the patient. The current invention comprises a flexible double walled pouch that is formed from two layers of polymer. The pouch is alternately expanded and contracting by magnetic solenoid. When contracted, a medicating agent is pushed out of the pouch through a plurality of needles. When the pouch is expanded, surrounding cerebral fluid is drawn into the space between the double walls of the pouch from which it is drawn through a catheter to an analyzer. Cerebral fluid drawn from the patient is analyzed. The operation of the apparatus and hence the treatment is remotely controlled based on these measurements and displayed through an external controller.