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Sterilization Validation Engineering & Testing Services

Sterilization validation, bioburden, endotoxin, and EO residual testing for medical devices in FDA-registered, ISO 13485-certified facilities.

Two laboratory technicians in white lab coats conducting bioburden testing, handling test tubes with liquid samples near a sterilization chamber in a controlled lab setting.

Ensuring Medical Device Sterility & Compliance

Sterilization validation is a critical step in medical device manufacturing, ensuring that products meet regulatory requirements, patient safety standards, and market expectations. At Life Science Outsourcing (LSO), we provide comprehensive sterilization validation engineering and testing services, designed to help medical device manufacturers validate, verify, and maintain sterilization effectiveness.

As an FDA-registered, ISO 13485-certified contract manufacturer, our sterilization validation services support compliance with ISO 11135, ISO 17665, and ISO 11737 standards, covering a full range of biological, chemical, and particulate testing.

Comprehensive Sterilization Validation
& Testing Services

Bacterial Endotoxin Testing

Bacterial endotoxin testing (BET), or LAL testing, ensures that medical devices and materials meet pyrogen-free requirements to prevent harmful inflammatory responses in patients. LSO provides:

  • Limulus Amebocyte Lysate (LAL) testing for pyrogen detection
  • USP <85> and ISO 11737-1 compliant methodologies
  • Endotoxin detection for single-use and reusable medical devices
A laboratory technician in a sterile environment performing bacterial endotoxin testing using a pipette and microplate.
Two laboratory technicians in white lab coats conducting bioburden testing, handling test tubes with liquid samples near a sterilization chamber in a controlled lab setting.

Bioburden Testing

Bioburden testing measures the microbial contamination levels on a medical device before sterilization. Our services include:

  • ISO 11737-1 compliant bioburden testing
  • Quantification of aerobic, anaerobic, and fungal contaminants
  • Routine monitoring for process validation and control

Cytotoxicity Testing

Cytotoxicity testing evaluates the potential toxic effects of a medical device on living cells, ensuring biocompatibility and patient safety. LSO offers:

  • ISO 10993-5 compliant cytotoxicity testing
  • Elution, agar overlay, and direct contact assays

Comprehensive biocompatibility assessments

Medical lab technician pipetting cell culture media into test tubes during cytotoxicity testing for medical device biocompatibility in a sterile lab.
Scientist examining microbial samples under a microscope in a sterile lab environment for medical device testing.

EO Residual Testing

Regulatory-compliant labeling is critical for traceability, UDI compliance, and patient safety. LSO offers:

  • UDI-compliant labeling solutions
  • Tamper-evident and specialty labels
  • Full lot traceability and ERP-integrated tracking

Microbial Identifications

Microbial identification is essential for understanding contaminant sources and mitigating risks in medical device manufacturing. Our testing includes:

  • Genotypic and phenotypic microbial identification
  • Bacterial, fungal, and yeast classification
  • Root cause analysis for contamination events
Close-up of a gloved hand holding a petri dish with microbial colonies growing on agar, used for bioburden testing in laboratory environments.
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Particulate Analysis

Particulate contamination can compromise device safety and performance. LSO’s particulate analysis ensures that devices meet USP <788> and ISO 8536-4 standards. Our capabilities include:

  • Subvisible particulate testing for injectable and implantable devices
  • Laser diffraction and light obscuration particle size analysis
  • Environmental particulate monitoring for cleanroom compliance

Sterility Testing

Sterility testing confirms that medical devices are free from viable microorganisms after sterilization. Our services include:

  • ISO 11737-2 compliant sterility testing
  • Direct immersion and membrane filtration methods
  • Testing for steam, EtO, gamma, and e-beam sterilized products

Why LSO?

  • FDA-Registered, ISO 13485-Certified – Ensuring compliance with the highest industry standards
  • End-to-End Manufacturing & Assembly – From prototyping to full-scale production
  • Bicoastal & Nearshore Operations – Facilities in California, New Hampshire, and Costa Rica for cost-effective, scalable solutions
  • Quick-Turn Services – Faster sterilization, validation, and lot release to accelerate market entry
  • Proven Expertise in Medical Devices – Supporting orthopedics, neuromodulation, cardiovascular devices, and more

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