{
    "title": "Nanomagnetic Blood Cleaning System",
    "inventor_name": "Donald Ingber",
    "publication_year": 2009,
    "device_name": "Nanomagnetic Blood Cleaning System",
    "goal": "Reduce mortality from sepsis by removing pathogenic bacteria from blood and augmenting antibiotic efficacy.",
    "problem_addressed": "Bloodstream bacterial infections (sepsis) that cause organ failure and death.",
    "concept_summary": "The system uses microscopic plastic-coated iron-oxide beads functionalized with antibodies that bind to target bacteria. Blood mixed with the beads is passed through a dialysis-type flow channel where an electromagnet creates a magnetic field gradient that pulls the bead-pathogen complexes out of the blood stream, allowing cleaned blood to return to the patient.",
    "detailed_description": null,
    "category": "Medical & Dental Technologies",
    "principles": [
        "Magnetic separation (magnetophoresis)",
        "Antibody-mediated targeting of pathogens",
        "Laminar flow microfluidics",
        "Electromagnetic field gradient"
    ],
    "scientific_domains": [
        "Biomedical Engineering",
        "Immunology",
        "Microfluidics",
        "Magnetism"
    ],
    "mechanisms_of_action": [
        "Antibody-coated iron oxide beads bind to bacteria",
        "Electromagnet attracts beads, pulling them out of the blood flow",
        "Separated beads and attached bacteria are collected as waste"
    ],
    "materials": [
        "Iron oxide (magnetic core)",
        "Plastic coating",
        "Specific antibodies"
    ],
    "energy_sources": [
        "Electromagnet power (electricity)"
    ],
    "inputs": [
        "Patient blood",
        "Antibody-coated magnetic beads"
    ],
    "outputs": [
        "Pathed blood",
        "Pathogen-laden bead waste"
    ],
    "claimed_performance": "In vitro tests removed up to 80 % of the pathogens from blood.",
    "experimental_evidence": "In vitro experiments reported removal of up to 80 % of pathogens, sufficient for remaining bacteria to be cleared by antibiotics.",
    "replication_status": null,
    "keywords": [
        "magnetic bead separation",
        "sepsis",
        "blood purification",
        "antibody targeting",
        "microfluidic device",
        "electromagnet"
    ],
    "related_technologies": [
        "Magnetic--cell separation",
        "Dialysis machines",
        "Microfluidic particle sorters"
    ],
    "controversy_level": "low",
    "confidence_score": 0.9,
    "practicability_score": 0.7,
    "fringe_score": 0.2,
    "evidence_strength": 0.6,
    "risk_score": 0.2,
    "trl_estimate": 4,
    "source_urls": [
        "http://www.fastcompany.com/blog/kit-eaton/technomix/magnetic-blood-cleaning-trick-could-save-lives-star-trek-style",
        "http://www.popsci.com/scitech/article/2009-06/dr-magneto"
    ],
    "organizations": [
        "Harvard Medical School",
        "Children's Hospital"
    ],
    "applications": [
        "Sepsis treatment",
        "Blood purification in intensive care",
        "Potential removal of circulating cancer cells"
    ],
    "limitations": [
        "Current data limited to in-vitro experiments",
        "Requires extracorporeal blood handling",
        "Potential immunogenicity of injected beads",
        "Scale-up and regulatory approval not demonstrated"
    ],
    "open_questions": [
        "Efficacy and safety in vivo (animal and human trials)",
        "Optimal bead size and coating for different pathogens",
        "Long-term effects of residual magnetic beads",
        "Cost and scalability of the magnetic separation system"
    ],
    "red_flags": [],
    "evidence_quotes": [
        "The system works by removing dangerous bacteria not by using fine porous filtration, but instead the power of magnets.",
        "Microscopic plastic-coated beads of iron oxide are treated with antibodies that seek out the infecting cells, and attach to them.",
        "In tests it removed up to 80 % of the pathogens, which is enough that the rest can be easily cleared up with traditional antibiotic remedies.",
        "Ingber is confident his technique will perform well when he moves on to animal experimentation later this year.",
        "The machine operates more quickly than traditional antibiotic treatment."
    ]
}