Derivative works — US Patent 12239333

Defensive Disclosure Document for US Patent 12239333

This document outlines derivative variations of the core claims of US Patent 12239333, "Single insertion delivery system for treating embolism and associated systems and methods," for defensive publishing purposes. The aim is to create readily available prior art to render future incremental improvements by competitors as obvious or non-novel.

Independent Claim 1 Derivatives (Method for clot removal with two valve inserts)

Claim 1 (Recap): A method for removing clot material from a patient's blood vessel, involving: (1) inserting a guide catheter, (2) advancing an interventional device, (3) connecting an attachment member with a hemostasis valve and branch lumen, (4) retracting device/clot with aspiration, (5) inserting a first valve insert to open the hemostasis valve, (6) withdrawing the interventional device through the first valve insert (continuous lumen), (7) removing the first valve insert and replacing with a second valve insert, (8) tightening the second valve insert to seal around a component, and (9) aspirating the guide catheter again through the branch lumen.

1.1 Material & Component Substitution: Bioresorbable Polymer Inserts with Magnetic Retention

Enabling Description:
A method wherein the first and second valve inserts (650, 860) are fabricated from a bioresorbable polymer, such as polylactic-co-glycolic acid (PLGA) or polycaprolactone (PCL), designed to degrade within a specified timeframe (e.g., 24-72 hours) post-procedure. The engagement features (652, 862) on these inserts, instead of mechanical snap-fits, incorporate small, biocompatible ferromagnetic particles or a thin ferromagnetic layer. Corresponding magnetic elements (e.g., neodymium iron boron micro-magnets) are embedded within the attachment member (408) to provide a reversible, secure magnetic coupling, thereby retaining the inserts. The tensioning mechanism of the second valve insert (860) utilizes a shape memory alloy (e.g., Nitinol) collar that constricts upon an external thermal or electrical signal, replacing traditional screw-thread tightening for sealing around the guidewire.

graph TD
    A[Insert Guide Catheter] --> B[Advance Interventional Device]
    B --> C[Attach Attachment Member (Magnetic)]
    C --> D{Retract Device & Aspirate}
    D --> E[Insert First Bioresorbable Insert (Magnetic Retention)]
    E --> F[Withdraw Interventional Device]
    F --> G[Remove First Insert]
    G --> H[Insert Second Bioresorbable Insert (Magnetic Retention & Nitinol Seal)]
    H --> I[Activate Nitinol Seal]
    I --> J[Aspirate Guide Catheter]
    J --> K{Additional Pass?}
    K -- Yes --> B
    K -- No --> L[Remove Catheter System]

1.2 Operational Parameter Expansion: Cryo-Aspiration with Dynamic Lumen Control

Enabling Description:
A method for large-volume, high-viscosity clot removal, potentially in pulmonary arteries up to 50mm in diameter, utilizing cryo-aspiration. The guide catheter (206) and attachment member (408) are constructed from cryogenically compatible polymers (e.g., PTFE with reinforced braiding). The aspiration system is enhanced with a closed-loop cryocooler (e.g., Stirling cycle cooler) positioned proximally, delivering a cryo-agent (e.g., supercooled saline or inert gas) to the distal lumen of the guide catheter (206). This creates a localized hypothermic zone (e.g., 0-4°C) around the clot material (PE) to increase its viscosity and structural integrity, reducing fragmentation during retraction. The first valve insert (650) is designed with active lumen dilation capabilities, using miniature inflatable micro-balloons or radially expanding Nitinol stents integrated into its structure, actuated pneumatically or electrically, to dynamically match the expanding clot diameter (up to 30% larger than the guide catheter's relaxed internal diameter) during withdrawal, preventing stripping. The aspiration pressure can reach -700 mmHg (relative to atmospheric).

stateDiagram
    state "Deployment" {
        [*] --> Insert_Catheter
        Insert_Catheter --> Advance_Device
        Advance_Device --> Engage_Clot
    }
    state "Clot Retrieval Pass" {
        Engage_Clot --> Retract_Device_Cryo_Aspirate: Apply Cryo-agent, -700mmHg
        Retract_Device_Cryo_Aspirate --> Insert_First_Insert_Dynamic: Actively Dilate Lumen
        Insert_First_Insert_Dynamic --> Withdraw_Device_No_Stripping
        Withdraw_Device_No_Stripping --> Remove_First_Insert
        Remove_First_Insert --> Insert_Second_Insert_Sealed
        Insert_Second_Insert_Sealed --> Re_Aspirate_Cryo_Guide: Clear Residual
    }
    state "Procedure End" {
        Re_Aspirate_Cryo_Guide --> Check_Clot_Removal
        Check_Clot_Removal -- More Clot --> Engage_Clot
        Check_Clot_Removal -- No More Clot --> Remove_Catheter
        Remove_Catheter --> [*]
    }

1.3 Cross-Domain Application: Industrial Sediment Retrieval in Submersible Piping

Enabling Description:
A method for removing sediment and particulate build-up from submerged industrial piping systems (e.g., wastewater treatment plant intake pipes, chemical process lines) up to 200mm in diameter. The "guide catheter" is a robust, chemically resistant polymer conduit (e.g., HDPE or PVDF) temporarily installed upstream of the blockage. The "interventional device" is a mechanical grabber or auger tool, powered by a subsea hydraulic motor, advanced through this conduit. The "attachment member" is a high-pressure valve assembly, integrated with a large-diameter branch lumen for aspiration, attached to the conduit. During retraction of the grabber tool with collected sediment, a first valve insert, made of hardened ceramic or abrasion-resistant steel, is inserted to create a smooth, continuous flow path, preventing damage to the primary valve seals from abrasive particulates. After removing the grabber tool, a second valve insert with an adjustable elastomeric seal is inserted and tightened around a residual guidewire or cleaning brush, enabling high-flow aspiration (up to 10 m³/hr) to remove residual fine sediments from the conduit.

flowchart TD
    A[Install Industrial Conduit] --> B[Advance Hydraulic Grabber]
    B --> C[Attach High-Pressure Valve Assembly]
    C --> D{Retract Grabber & Aspirate Sediment}
    D --> E[Insert Ceramic Valve Insert]
    E --> F[Withdraw Grabber/Sediment]
    F --> G[Remove Ceramic Insert]
    G --> H[Insert Elastomeric Seal Insert]
    H --> I[Tighten Seal Insert around Cleaning Brush]
    I --> J[Aspirate Conduit (High Flow)]
    J --> K{More Sediment?}
    K -- Yes --> B
    K -- No --> L[Remove Conduit System]

1.4 Integration with Emerging Tech: AI-Optimized, IoT-Monitored Thrombectomy with Blockchain Provenance

Enabling Description:
A method for AI-optimized thrombectomy where the catheter system (200), attachment member (408), and valve inserts (650, 860) are equipped with embedded IoT sensors. Micro-electromechanical systems (MEMS) pressure sensors, optical spectroscopy clot composition sensors, and miniature accelerometers are integrated along the guide catheter (206) and interventional device (ID). The attachment member (408) includes flow rate and temperature sensors in its branch lumen (444). Data from these sensors is transmitted via a low-power wireless module (e.g., Bluetooth Low Energy 5.0) to a local edge computing unit. An AI algorithm (e.g., a deep reinforcement learning model) running on this unit analyzes real-time sensor data to dynamically optimize aspiration pressure, retraction speed, and first valve insert lumen diameter for maximal clot removal and minimal vessel trauma. The AI also determines the optimal timing for switching between valve inserts. All procedural parameters, sensor readings, and clot removal events (including before/after images) are securely logged onto a private blockchain (e.g., Hyperledger Fabric), ensuring an immutable record for regulatory compliance, supply chain verification of device components, and patient outcome analysis.

sequenceDiagram
    participant ID as Interventional Device
    participant GC as Guide Catheter
    participant AM as Attachment Member
    participant S as IoT Sensors
    participant ECU as Edge Computing Unit (AI)
    participant BC as Blockchain Network
    participant OP as Operator Console

    OP->GC: Insert Guide Catheter
    OP->ID: Advance Interventional Device
    ID->AM: Attach to Attachment Member
    loop Clot Removal Passes
        OP->ECU: Request Clot Retrieval
        ECU->AM: Control Aspiration & Retraction (AI-Optimized)
        S->ECU: Stream Real-time Data (Pressure, Flow, Clot Comp.)
        AM->OP: Display Live Metrics
        OP->AM: Insert First Valve Insert (AI-Guided)
        OP->ID: Withdraw Interventional Device
        OP->AM: Remove First Insert & Replace Second (AI-Guided)
        AM->ECU: Adjust Seal (AI-Optimized)
        AM->ECU: Re-Aspirate Guide Catheter
        ECU->BC: Log Procedure Data (Timestamp, Sensor Data, AI Actions)
        BC->BC: Verify & Immutable Record
        OP->ECU: Determine Next Step (AI-Assisted)
    end
    OP->GC: Remove Catheter System

1.5 The "Inverse" or Failure Mode: Controlled Defragmentation and Drug Delivery System

Enabling Description:
A method where the system is primarily designed for controlled defragmentation of large, intractable clots and targeted thrombolytic drug delivery, rather than complete mechanical extraction in a single piece. If a clot (PE) is too large or adherent, the interventional device (ID) features an ultrasonic fragmentation tip. During initial retraction, the aspiration pressure is intentionally kept low (e.g., -50 mmHg) to minimize distal embolization, and a first valve insert (650) is used that has a perforated inner lumen lined with a thrombolytic agent (e.g., tPA). This insert is activated to slowly release the drug as the fragmented clot passes through, initiating chemical dissolution. If the primary hemostasis valve (445) in the attachment member (408) experiences excessive pressure buildup or is compromised, an integrated pressure relief mechanism (e.g., a burst disk or spring-loaded valve) automatically vents the aspiration lumen to an external sterile collection bag, preventing proximal backflow into the patient and ensuring safe operation. The second valve insert (860) is designed with a porous membrane that allows continuous low-flow irrigation/drug infusion (e.g., heparinized saline) while maintaining a partial hemostasis, preventing total vessel occlusion even in failure scenarios.

stateDiagram
    state "Initial Engagement" {
        [*] --> Insert_Catheter_LowFlow
        Insert_Catheter_LowFlow --> Advance_Device_Fragmentation
        Advance_Device_Fragmentation --> Engage_Intractable_Clot
    }
    state "Controlled Defragmentation & Drug Delivery Pass" {
        Engage_Intractable_Clot --> Retract_Device_LowAspirate: Ultrasonic Fragmentation, -50mmHg
        Retract_Device_LowAspirate --> Insert_First_Insert_Perforated: Thrombolytic Release
        Insert_First_Insert_Perforated --> Process_Clot_Fragments
        Process_Clot_Fragments --> Check_Pressure_Relief: If > Threshold, Vent Safely
        Process_Clot_Fragments --> Remove_First_Insert
        Remove_First_Insert --> Insert_Second_Insert_Porous: Continuous Low-Flow Irrigation
        Insert_Second_Insert_Porous --> Monitor_Vessel_Condition
    }
    state "Termination" {
        Monitor_Vessel_Condition -- Clot Resolved --> Remove_Catheter_Safe
        Monitor_Vessel_Condition -- Persistence --> Engage_Intractable_Clot
        Remove_Catheter_Safe --> [*]
    }

Independent Claim 9 Derivatives (Method for clot removal with actuated attachment member)

Claim 9 (Recap): A method for intravascular treatment of clot material, involving: (1) inserting a guide catheter and advancing an interventional device, (2) coupling an attachment member with a tubular member (central lumen) and actuation mechanism, (3) retracting device/clot with aspiration, (4) determining if more passes are needed, (5) if so, actuating the attachment member to open the tubular member (continuous lumen), (6) withdrawing the interventional device, (7) returning the attachment member to its sealed state, and (8) aspirating the guide catheter through a branch lumen.

2.1 Material & Component Substitution: Self-Healing Elastomer Tubular Member with Piezoelectric Actuation

Enabling Description:
A method wherein the tubular member (1372) of the attachment member (1108) is constructed from a self-healing, biocompatible elastomer (e.g., a polyurethane-urea with embedded microcapsules of healing agent). This material can autonomously repair minor punctures or tears that might occur during device insertion/withdrawal, enhancing durability and hemostatic integrity over multiple passes. The actuation mechanism (1375) for collapsing and expanding the tubular member (1372) is replaced by an array of annular piezoelectric transducers (e.g., PZT ceramic rings) embedded within the housing (1370) of the attachment member (1108). These transducers are controlled by an external electrical signal to generate radial compression or expansion forces, precisely controlling the diameter of the tubular member's central lumen (1374) to maintain hemostasis or open for interventional device passage. The buttons (1378) are replaced by capacitive touch sensors that activate the piezoelectric array.

classDiagram
    class GuideCatheter {
        +lumen: channel
        +distal_end: position
    }
    class InterventionalDevice {
        +engage_clot()
        +withdraw()
    }
    class AttachmentMember {
        +tubular_member: SelfHealingElastomer
        +actuation_mechanism: PiezoelectricArray
        +branch_lumen: channel
        +seal()
        +unseal()
        +aspirate()
    }
    class PiezoelectricArray {
        +apply_radial_force(signal: electrical)
    }
    class CapacitiveSensor {
        +detect_touch(): boolean
    }

    GuideCatheter --o AttachmentMember
    InterventionalDevice --o GuideCatheter
    AttachmentMember --o PiezoelectricArray
    CapacitiveSensor --> AttachmentMember: controls

2.2 Operational Parameter Expansion: Ultra-High Frequency Pulsatile Aspiration with Real-time Pressure Feedback

Enabling Description:
A method for thrombectomy in highly tortuous or fragile vessels (e.g., intracranial or renal arteries) using ultra-high frequency pulsatile aspiration. The RA device (100) incorporates a micro-reciprocating pump capable of generating aspiration pulses at frequencies ranging from 500 Hz to 2 kHz, with peak negative pressures reaching -400 mmHg and rapid pressure cycling. The attachment member (1108) is equipped with a MEMS pressure sensor directly embedded within the wall of the tubular member (1372) to provide real-time intra-lumen pressure feedback. This feedback is used by a proportional-integral-derivative (PID) control algorithm to dynamically adjust the actuation mechanism (1375) and the pulsatile aspiration parameters. The tubular member (1372) is expanded to its maximal diameter (matching the guide catheter lumen) to allow frictionless passage of the interventional device (ID) during withdrawal, then precisely sealed (e.g., to within 0.1mm of the guidewire diameter) during pulsatile aspiration, optimizing clot capture and minimizing vessel wall trauma from high-frequency pressure fluctuations.

sequenceDiagram
    participant ID as Interventional Device
    participant GC as Guide Catheter
    participant AM as Attachment Member
    participant PS as Pressure Sensor (MEMS)
    participant RP as Reciprocating Pump (RA Device)
    participant PID as PID Controller
    participant OP as Operator

    OP->GC: Insert Guide Catheter
    OP->ID: Advance Interventional Device
    ID->AM: Couple Attachment Member
    loop Multiple Passes
        OP->RP: Initiate Pulsatile Aspiration (500Hz-2kHz)
        RP->AM: Generate Aspiration
        AM->PS: Measure Intra-lumen Pressure
        PS->PID: Send Pressure Feedback
        PID->RP: Adjust Pump Parameters
        PID->AM: Adjust Actuation Mechanism (for sealing)
        OP->AM: Actuate (Open) Tubular Member
        AM->ID: Withdraw Interventional Device
        OP->AM: Release Actuation (Seal Tubular Member)
        AM->RP: Resume Pulsatile Aspiration (Guide Catheter)
        OP->OP: Assess Need for More Passes
    end
    OP->GC: Remove Catheter

2.3 Cross-Domain Application: Precision Filtration and Recovery in Pharmaceutical Synthesis

Enabling Description:
A method for precision filtration and recovery of fine particulate catalysts or sensitive biological precipitates from fluid streams in pharmaceutical synthesis processes. The "guide catheter" is a sterile, electropolished stainless steel conduit in a closed-loop reactor system. The "interventional device" is a retractable micro-filter or a harvesting probe. The "attachment member" is an aseptic valve assembly coupled to the conduit. This assembly includes a tubular member made from a chemically inert, autoclavable polymer (e.g., PEEK or reinforced silicone) forming a central lumen. An automated actuation mechanism (e.g., pneumatic piston or servo-motor driven cam) precisely collapses the tubular member to seal around the harvesting probe during aspiration, preventing cross-contamination or loss of material. To withdraw the harvesting probe, the actuation mechanism is commanded to fully open the tubular member, creating a smooth, unobstructed flow path to avoid damaging the delicate filter membrane or disturbing collected precipitates, ensuring high yield and purity.

flowchart TD
    A[Connect Sterile Conduit] --> B[Advance Harvesting Probe]
    B --> C[Couple Aseptic Valve Assembly]
    C --> D{Retract Probe & Filter/Harvest}
    D --> E[Automate Actuation (Open Valve)]
    E --> F[Withdraw Probe with Material]
    F --> G[Automate Actuation (Seal Valve)]
    G --> H[Aspirate Conduit (Residue Removal)]
    H --> I{More Filtration?}
    I -- Yes --> B
    I -- No --> J[Disconnect System]

2.4 Integration with Emerging Tech: Predictive Maintenance & Automated Actuation with Digital Twin

Enabling Description:
A method leveraging a digital twin for predictive maintenance and automated actuation. A digital twin of the entire clot retrieval system (1), including the attachment member (1108) and interventional device (ID), is continuously updated with real-time operational data (e.g., number of passes, clot material characteristics, actuation cycles, filament stress) streamed from embedded IoT sensors via a secure 5G connection. The digital twin predicts potential component wear (e.g., fatigue in the tubular member, degradation of the actuation mechanism) and suggests optimal replacement intervals or proactive maintenance actions. The actuation mechanism (1375) of the attachment member (1108) is automated using a high-precision servo motor, controlled by a local microcontroller. An AI model, trained on historical procedure data and the digital twin's simulations, dynamically adjusts the tubular member's opening and closing sequences and sealing pressure based on the predicted clot morphology and vessel characteristics to minimize stripping and optimize aspiration, overriding manual button presses (1378) for improved consistency and safety.

stateDiagram
    state "Initialization" {
        [*] --> System_Online
        System_Online --> Digital_Twin_Created
        Digital_Twin_Created --> Sensors_Streaming_Data
    }
    state "Operational Phase" {
        Sensors_Streaming_Data --> AI_Model_Predicting_Optimal_Actions
        AI_Model_Predicting_Optimal_Actions --> Auto_Actuate_Attachment_Member
        Auto_Actuate_Attachment_Member --> Retract_Device_Aspirate
        Retract_Device_Aspirate --> DT_Updates_State: Update Digital Twin
        DT_Updates_State --> AI_Model_Predicting_Optimal_Actions
    }
    state "Predictive Maintenance" {
        DT_Updates_State --> Monitor_Component_Health
        Monitor_Component_Health -- Wear Detected --> Suggest_Maintenance
        Suggest_Maintenance --> Operator_Action
    }
    state "End of Procedure" {
        Retract_Device_Aspirate --> Procedure_Complete
        Procedure_Complete --> System_Offline
        System_Offline --> [*]
    }

2.5 The "Inverse" or Failure Mode: Fail-Open Co-Aspiration for Distal Embolus Protection

Enabling Description:
A method wherein the attachment member (1108) is designed to default to a "fail-open" state to facilitate continuous co-aspiration and provide distal embolus protection in case of primary system failure or a highly friable clot. The actuation mechanism (1375) includes a default spring-biased configuration that holds the tubular member (1372) in a continuously expanded (unsealed) state, maintaining a constant diameter lumen equal to the guide catheter's inner diameter. Sealing (collapsing the tubular member) only occurs when a positive external force is applied (e.g., holding down buttons 1378 against the spring bias). If the operator releases the buttons or if there is a power failure to an electronic actuation system, the tubular member immediately reverts to its open state. This ensures a pathway for constant, albeit lower, aspiration through the guide catheter (206) even during interventional device (ID) withdrawal, continuously removing small emboli generated by a friable clot and minimizing distal embolization. A passive filter integrated into the branch lumen (444) captures any inadvertently aspirated large fragments.

graph TD
    A[Insert Guide Catheter] --> B[Advance Interventional Device]
    B --> C[Couple Attachment Member (Fail-Open Bias)]
    C --> D{Retract Device & Aspirate (Continuous Low Flow)}
    D -- Operator applies force --> E[Seal Tubular Member (Active)]
    E -- Operator releases force / Power failure --> F[Unseal Tubular Member (Fail-Open)]
    F --> G[Withdraw Interventional Device (Continuous Aspiration)]
    G --> H[Return to Sealed State (Manual Override)]
    H --> I[Aspirate Guide Catheter (Full Flow)]
    I --> J{Additional Pass?}
    J -- Yes --> B
    J -- No --> K[Remove Catheter System]

Independent Claim 16 Derivatives (Attachment member apparatus)

Claim 16 (Recap): An attachment member for a catheter system, comprising: (1) a housing with a first lumen, (2) a branch portion with a second lumen for aspiration, and (3) a valve within the first lumen including a tubular member (central lumen) and an actuation mechanism (to collapse/seal and expand/unseal).

3.1 Material & Component Substitution: Smart Composite Housing with Electroactive Polymer Valve

Enabling Description:
An attachment member (1108) featuring a housing (1370) constructed from a smart composite material (e.g., carbon fiber reinforced polymer with embedded strain gauges and optical fibers). This housing provides structural integrity and allows real-time monitoring of stress and deformation. The valve within the first lumen (1371) utilizes a tubular member (1372) made of an electroactive polymer (EAP), such as a dielectric elastomer actuator (DEA) or ionic polymer-metal composite (IPMC). The actuation mechanism (1375) is an integrated micro-electrode array that applies voltage across the EAP tubular member, causing it to radially contract (seal) or expand (unseal) without mechanical moving parts like filaments (1376) or buttons (1378). The magnitude and polarity of the applied voltage directly control the lumen diameter (1374), allowing for precise, continuous adjustment of the hemostatic seal or full opening, and eliminating potential mechanical wear points.

classDiagram
    class AttachmentMember_SmartComposite {
        +housing: SmartComposite
        +first_lumen: Channel
        +branch_portion: Branch
        +second_lumen: Channel
        +valve: EAPValve
    }
    class SmartComposite {
        +material: CarbonFiberRP
        +embedded_sensors: StrainGauges, OpticalFibers
    }
    class EAPValve {
        +tubular_member: ElectroactivePolymer (DEA/IPMC)
        +actuation_mechanism: MicroElectrodeArray
        +collapse_seal(voltage: float)
        +expand_unseal(voltage: float)
        -central_lumen: Channel
    }
    class MicroElectrodeArray {
        +apply_voltage(target_EAP: ElectroactivePolymer, voltage: float)
    }

    AttachmentMember_SmartComposite "1" -- "1" SmartComposite : includes
    AttachmentMember_SmartComposite "1" -- "1" EAPValve : includes
    EAPValve "1" -- "1" MicroElectrodeArray : controls
    AttachmentMember_SmartComposite "1" -- "1" Branch : has

3.2 Operational Parameter Expansion: Variable-Stiffness Tubular Member for Extreme Pressure Gradients

Enabling Description:
An attachment member (1108) engineered for deployment in medical scenarios involving extreme pressure gradients (e.g., veno-venous extracorporeal membrane oxygenation (VV-ECMO) circuits with high-flow pumps, or arterial access under severe hypertension). The tubular member (1372) is fabricated from a novel, variable-stiffness polymer composite, such as a magnetorheological elastomer (MRE) or electrorheological fluid-filled membrane. An integrated electromagnetic coil or electrostatic field generator serves as the actuation mechanism (1375). By altering the magnetic or electric field strength, the stiffness and compliance of the tubular member (1372) can be rapidly and reversibly modulated. This allows the valve to dynamically adapt its sealing force and resistance to collapse, ensuring a robust hemostatic seal (e.g., against pressure differentials exceeding 500 mmHg) when required, while offering minimal resistance to interventional device (ID) passage (e.g., reducing friction coefficient by 80%) when the tubular member is in its expanded state.

stateDiagram
    state "Default: Low Stiffness" {
        direction LR
        Low_Stiffness --> Apply_Field : Increase Field
        Apply_Field --> High_Stiffness : Modulate Stiffness
        High_Stiffness --> Remove_Field : Decrease Field
        Remove_Field --> Low_Stiffness
    }
    state "Functionality" {
        Low_Stiffness : Device Passage, Minimal Resistance
        High_Stiffness : Robust Seal, High Pressure Differential
    }

3.3 Cross-Domain Application: High-Purity Fluid Interface for Semiconductor Manufacturing

Enabling Description:
An attachment member (1108) configured as a high-purity fluid interface for introducing and withdrawing processing tools (e.g., microscopic inspection probes, chemical injectors) into ultra-clean fluidic channels within semiconductor manufacturing equipment (e.g., for wafer cleaning or etching). The housing (1370) is machined from a high-grade, passivated stainless steel or optical-grade quartz. The first lumen (1371) connects to the process fluid line. The branch portion (444) is designed for vacuum-assisted contaminant removal, connected to a high-purity nitrogen purge or dedicated vacuum pump. The valve comprises a tubular member (1372) made of ultra-high molecular weight polyethylene (UHMWPE) or a fluoropolymer (e.g., PFA) for chemical inertness and particle shedding resistance. The actuation mechanism (1375) is a pneumatic cylinder that precisely compresses or relaxes the tubular member (1372). This allows a hermetic seal (leak rate <10⁻⁹ mbar·l/s) around the inserted tool, preventing airborne particulate contamination, and ensures a smooth, particle-free path during tool withdrawal, critical for maintaining wafer yield.

flowchart TD
    A[Process Fluid Line] --> B[AttachmentMember_Semiconductor]
    B --> C{Tool Insertion/Withdrawal}
    C -- Insert Tool --> D[Pneumatic Actuator (Seal UHMWPE Valve)]
    D --> E[Process Fluid Flow]
    C -- Withdraw Tool --> F[Pneumatic Actuator (Open UHMWPE Valve)]
    F --> G[Vacuum-Assisted Purge (Branch Lumen)]
    G --> H[Tool Removed]
    H --> I[Process Completion]

3.4 Integration with Emerging Tech: AI-Driven Self-Calibrating Valve with Embedded Microfluidic Diagnostics

Enabling Description:
An attachment member (1108) with an AI-driven, self-calibrating valve and embedded microfluidic diagnostics. The housing (1370) incorporates a microfluidic channel network with optical sensors (e.g., micro-spectrometers, particle counters) at the junction of the first (1371) and second (442) lumens. These sensors perform real-time diagnostic analysis of aspirated fluid for residual clot material, blood cell lysis, or presence of infection markers. An integrated microcontroller runs an AI algorithm (e.g., a neural network) that uses this diagnostic data, along with pressure and flow sensor readings, to self-calibrate the actuation mechanism (1375) of the tubular member (1372). This AI-driven calibration optimizes the sealing pressure to minimize both leakage and frictional drag on the interventional device (ID), extending valve lifespan and ensuring consistent performance over multiple passes. The system can alert the operator to abnormal fluid composition or compromised valve integrity.

graph TD
    A[Catheter System Component] --> B[First Lumen (Housing)]
    B --> C[Valve (Tubular Member & Actuation)]
    C --> D[Second Lumen (Branch Portion)]
    D --> E[Aspiration System]

    C -- Control --> F[AI Controller (Microcontroller)]
    D -- Fluid Sample --> G[Microfluidic Diagnostics (Optical Sensors)]
    G -- Data --> F
    F -- Calibration Signal --> C
    F -- Alerts --> H[Operator Interface]
    B -- Pressure/Flow --> F

3.5 The "Inverse" or Failure Mode: Modular Sacrificial Liner with Bypass Port

Enabling Description:
An attachment member (1108) designed with a modular, sacrificial liner system and an emergency bypass port, to safely manage severe clot stripping events or valve failures. The tubular member (1372) is a disposable, replaceable cartridge featuring multiple, independently segmented, thin-walled polymer liners (e.g., silicone or polyurethane). The actuation mechanism (1375) is configured to only compress the outermost intact liner segment. If clot material (PE) strips and damages a liner, the system automatically detects a breach (e.g., via embedded conductive traces or differential pressure sensors) and the operator can mechanically rotate the cartridge to engage a new, undamaged liner segment. Furthermore, the housing (1370) includes a spring-loaded, normally-closed emergency bypass port connected directly from the first lumen (1371) to an external waste collection system. In the event of catastrophic valve failure (e.g., complete inability to seal) or an acute high-pressure event, this bypass port automatically opens at a predefined pressure threshold (e.g., 200 mmHg above normal operating pressure), diverting fluid and potentially stripped clot material away from the aspiration system and preventing backflow into the patient, ensuring patient safety as the primary goal.

stateDiagram
    state "Operational" {
        [*] --> Intact_Liner
        Intact_Liner --> Seal_Device : Actuation Mechanism
        Intact_Liner --> Pass_Device : Actuation Mechanism
        Seal_Device --> Intact_Liner
        Pass_Device --> Intact_Liner
    }
    state "Failure Management" {
        Intact_Liner -- Liner Damaged --> Breached_Liner_Detected
        Breached_Liner_Detected --> Rotate_Cartridge : New Liner
        Breached_Liner_Detected --> Emergency_Bypass_Open : Pressure Threshold Exceeded
        Rotate_Cartridge --> Intact_Liner
        Emergency_Bypass_Open --> External_Waste : Divert Fluid
        Emergency_Bypass_Open --> System_Alert
        System_Alert --> Operator_Intervention
    }

Combination Prior Art Scenarios with Open-Source Standards

These scenarios combine elements of US Patent 12239333 with existing open-source standards to demonstrate obviousness or lack of novelty for potential future advancements.

US12239333 + DICOM (Digital Imaging and Communications in Medicine) + OpenCV (Open Source Computer Vision Library):
- Scenario: A clot retrieval system as described in US12239333, where the determination of whether it is necessary or desirable to redeploy the interventional device (Claim 1, block 1003; Claim 9, block 1403) is augmented by real-time fluoroscopic imaging. The fluoroscopic images, acquired in DICOM format (an open-source standard for medical imaging), are fed into a computer vision system utilizing the OpenCV library. This system performs automated image analysis (e.g., blob detection, edge detection, optical flow) to quantify residual clot burden, measure vessel patency, and track interventional device position. The visual data, processed by OpenCV, provides objective feedback to the operator or an AI system (as in derivative 1.4 or 2.4) to guide subsequent passes, eliminating subjective visual assessment via the clot reservoir.
- Obviousness Argument: The combination of a known medical procedure device (US12239333) with widely adopted medical imaging standards (DICOM) and common open-source image processing tools (OpenCV) to enhance visualization and decision-making for a medical practitioner would be an obvious step for a person having ordinary skill in the art seeking to improve diagnostic accuracy and procedural efficiency.
US12239333 + FHIR (Fast Healthcare Interoperability Resources) + SMART on FHIR (Substitutable Medical Applications and Reusable Technologies):
- Scenario: A clot retrieval system as described in US12239333, where all procedural data, including device serial numbers, operator actions (e.g., pump cycles, valve insert changes), aspiration volumes, estimated clot sizes, and patient vital signs, are automatically captured and securely transmitted to an Electronic Health Record (EHR) system. This data is formatted according to FHIR standards (an open-source standard for exchanging healthcare information) and made accessible to third-party applications (e.g., a post-procedure analytics tool or a remote consultation platform) via the SMART on FHIR framework. This enables real-time clinical decision support, retrospective outcome analysis, and automated billing, all integrated seamlessly into the existing healthcare IT infrastructure.
- Obviousness Argument: Given the push for interoperability and data-driven healthcare, it would be obvious for a PHOSITA to integrate a medical device (US12239333) with established open-source healthcare data exchange standards like FHIR and SMART on FHIR to improve data capture, facilitate clinical research, and enhance patient care coordination.
US12239333 + ROS (Robot Operating System) + Gazebo (Robot Simulator):
- Scenario: A semi-autonomous robotic system built upon the principles of US12239333, particularly for precise catheter and interventional device navigation (e.g., guide catheter 206, delivery sheath 204, pull member 202). The robotic components (e.g., motorized stages for catheter advancement, force-feedback manipulators) are controlled by software developed using ROS (an open-source framework for robot software development). The entire procedure, including simulated clot engagement, valve insert manipulation, and aspiration, is first simulated in a Gazebo environment (an open-source 3D robotics simulator) to optimize control algorithms and train AI models for autonomous operation. The physical system then executes these optimized trajectories for device advancement, retraction, and valve actuation, potentially enabling remote or tele-operated thrombectomy.
- Obviousness Argument: The application of widely available open-source robotics frameworks (ROS, Gazebo) to automate and enhance the precision of a medical device procedure (US12239333) would be an obvious extension for a PHOSITA in the field of medical robotics, aiming to improve consistency, reduce operator fatigue, and enable new surgical paradigms.