By Fitiger Engineering Team  
Reviewed by Fitiger Product Safety Team
 
Technical interpretation based on third‑party challenge-testing data (CY2506164N-4 / CY2506164N-3) and authoritative reprocessing principles

TL;DR

• Independent laboratory testing validated the Fitiger EasyPumpVac (FAC‑01 platform) reprocessing approach: cleaning first, followed by 75% medical alcohol immersion disinfection.
• Under a worst‑case challenge using the minimum labeled immersion time (5 minutes), the disinfection study reported ≥6‑log reduction for four representative bacteria and ≥3‑log reduction for Mycobacterium terrae; conclusion: disinfection validation passed.
• Cleaning validation reported total protein residue approximately 0.3–0.4 μg/cm², well below the report acceptance limit of ≤6.4 μg/cm²; conclusion: cleaning validation passed.
• Together, these results support the recommended reprocessing procedure for reusable components when users follow the full Instructions for Use (IFU).

Executive Summary

• This white paper discloses core reprocessing validation data (cleaning + disinfection) for the Fitiger EasyPumpVac series (based on the FAC‑01 manual negative‑pressure suction platform), including the effectiveness of a 75% alcohol immersion disinfection method under a minimum immersion time challenge condition of 5 minutes.
• The validation used a standardized challenge workflow (inoculate → dry/fix → disinfect → extract/recover → culture and count) to demonstrate acceptable microbial reduction under high contamination load.
• Disinfection validation results: ≥6‑log reduction for four representative bacteria and ≥3‑log reduction for Mycobacterium terrae; report conclusion: disinfection validation passed.
• Cleaning validation results: total protein residue approximately 0.3–0.4 μg/cm², significantly below the acceptance limit of ≤6.4 μg/cm²; report conclusion: cleaning validation passed.
• In line with authoritative reprocessing principles, manufacturers are expected to provide validated reprocessing instructions and select disinfection intensity based on contact-risk level. Fitiger chose a more conservative validation endpoint (including Mycobacterium challenge) to reduce cross-contamination risk and improve verifiability.

1. Why must Fitiger anti‑choking devices undergo cleaning/disinfection validation?

Anti‑choking suction devices are emergency-contact devices: during a choking event, components may contact perioral skin, saliva, and secretions, and there is a possibility of repeated use across home or institutional settings. This makes a validated reprocessing pathway essential (cleaning to remove organic residues + disinfection to reduce microbial load). Without validated reprocessing, there is risk of secondary contamination and cross‑infection.

Fitiger selected third‑party validation for the following technical reasons:

• Emergency conditions are uncontrolled: contamination type and burden vary, so effectiveness must be demonstrated under worst‑case conditions.
• Reusable characteristics: reusable devices should provide repeatable, executable, and verifiable reprocessing instructions to meet regulatory and institutional procurement expectations (schools, transportation, eldercare, first responders, etc.).
• Material and structural complexity: mask surfaces and internal container surfaces can create microbial ‘harbor sites’; challenge testing verifies disinfectant contact and sufficient exposure time.
• User consistency: validation fixes key process parameters (concentration, time, and step order) as minimum acceptable standards to reduce misuse risk.  

  

                          

2. Validation Evidence and Study Design

• Evidence Source:
• Third‑party laboratory validation reports: CY2506164N‑4 (disinfection method effectiveness) and CY2506164N‑3 (cleaning method effectiveness), both approved on 2025‑06‑30.
• Method Transparency:
• Worst‑case design using high inoculum challenge + drying fixation + minimum exposure time; log‑reduction calculated with positive/negative controls and recovery correction.
• Scope:
• Applies to reprocessing of reusable EasyPumpVac (FAC‑01 platform) components; users must follow the full IFU.
• Compliance Baseline:
• Manufacturers are expected to provide validated reprocessing instructions and select disinfection intensity using risk-based classification; this white paper interprets Fitiger’s program under authoritative principles.
• Reproducibility:
• Reports include sample details, groups, strain identifiers, culture conditions, calculation methods, and pass conclusions for third‑party review.

3. Authoritative requirements for reprocessing devices contacting skin and/or mucosal areas

Key point: Regulations often do not hard-code a universal required log-reduction value. Instead, manufacturers are expected to
(a) provide executable reprocessing instructions,
(b) scientifically validate the effectiveness of those instructions,and
(c) select disinfection/sterilization level based on the body-contact risk level (intact skin vs mucosa vs sterile tissue).

Principle summary:

• Risk classification (Spaulding) and disinfection level: noncritical items contacting intact skin typically use cleaning plus low-level disinfection; semicritical items contacting mucosa or non-intact skin often require at least high-level disinfection depending on use and risk.
• FDA expectations for reusable medical devices: reprocessing instructions (cleaning, disinfection/sterilization, drying, inspection, etc.) should be scientifically validated and clearly presented in labeling/IFU.
• ISO 17664 series: requires manufacturers to provide information for processing (cleaning, disinfection or sterilization, etc.) to ensure safe and effective reuse.

4. Fitiger EasyPumpVac validation design (challenge conditions and verifiability)

4.1 Disinfection Validation (CY2506164N‑4)

Disinfectant & method: after rinsing/cleaning, immerse in 75% medical alcohol for ≥5 minutes and air dry naturally (the study used 5 minutes as the challenge condition).

Challenge design highlights:

• Target microorganisms: Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Mycobacterium terrae (strain identifiers provided in the report).
• Inoculum & fixation: inoculate 200 μL suspension onto the internal surfaces of the canister and large mask, then dry for 60 minutes in a biosafety cabinet to increase adhesion difficulty.
• Worst‑case parameter: the minimum manufacturer-claimed immersion time (5 minutes) was used as the challenge condition.
• Recovery & enumeration: wipe + extraction recovery, membrane filtration/plate counting, corrected by a recovery-efficiency factor, then log‑reduction calculated.
• Control system: positive control (inoculated, not disinfected) and negative control (not inoculated, disinfected) confirm test validity.

4.2 Cleaning Validation (CY2506164N‑3)

Cleaning workflow (per report): running-water rinse (≥30 s) → enzymatic detergent 1 mL:300 mL soak 2 min → brush 2 min (mask + canister) → rinse + soft-bristle brush 1 min → gauze wipe dry + air gun drying for canister interior.

Validation endpoints: no visible soil + total protein residue ≤6.4 μg/cm² (report limit).

5. Core results disclosure: disinfection and cleaning validation outcomes

5.1 Disinfection validation: log‑reduction results (minimum 5-minute challenge)

Table 1. Disinfection validation log-reduction results under minimum 5-minute immersion challenge conditions. Source: Third-party laboratory report CY2506164N-4.

Interpretation: The report pass threshold is bacteria ≥6‑log and Mycobacterium terrae ≥3‑log. Log‑reduction ranges under challenge conditions were above the thresholds.

5.2 Cleaning validation: protein residue results

Table 2. Cleaning validation protein residue results. Source: Third-party laboratory report CY2506164N-3.

Interpretation: Cleaning validation demonstrates that ‘cleaning first’ controls organic residues far below the acceptance limit, providing a stable and repeatable prerequisite for subsequent disinfection.

6. Comparison against ‘minimum expectations’: Fitiger chose a more conservative validation path

Many noncritical items that contact intact skin are typically associated with a ‘cleaning + low-level disinfection’ principle in authoritative guidance. However, in real emergencies an anti‑choking suction device may contact the perioral area and secretions. To reduce uncertainty, Fitiger adopted a more conservative validation strategy: third‑party challenge testing verified ≥6‑log reduction for common bacteria and included a Mycobacterium challenge meeting a ≥3‑log threshold.

What this means (no exaggeration — technical meaning only):

• Meeting and exceeding thresholds at the minimum 5-minute exposure suggests additional process margin against real‑world variation.
• Including a Mycobacterium challenge is a more conservative difficulty setting that improves coverage for more tolerant organisms (disinfection level still depends on IFU and intended context).
• Together with cleaning validation, this forms complete chain-of-evidence: cleaning reduces organic load, then disinfection reduces microbial load.

7. Validated reprocessing SOP

1. Disassemble: remove mask and other detachable parts per IFU.
2. Pre‑rinse: rinse under running water for ≥30 seconds until no visible contamination remains.
3. Enzymatic cleaning: add 1 mL enzymatic detergent to 300 mL water; soak for 2 minutes.
4. Brush: total 2 minutes (brush mask surfaces and canister interior surfaces).
5. Rinse & secondary brush: rinse and brush with a soft‑bristle brush for 1 minute.
6. Dry: wipe with gauze; the canister interior may be dried with an air gun.
7. Disinfect: fully immerse in 75% medical alcohol; time ≥5 minutes.
8. Air dry: remove and air dry naturally to avoid re‑contamination; store only after fully dry.

8. Technical FAQ

Q1: Why validate immersion disinfection instead of only wipe disinfection?

A: Immersion increases contact with complex surfaces and potential recesses/internal areas. Validating the minimum exposure time under worst‑case challenge aligns with engineering verification and reproducibility expectations.

Q2: Why use 5 minutes?

A: The report specifies the manufacturer’s instruction as ‘immerse for at least 5 minutes.’ The study used the minimum allowed immersion time as the challenge condition, which validates effectiveness at the lowest permitted parameter.

Q3: What is the basis for saying this is ‘more conservative’ than minimum expectations?

A: Authoritative guidance for many noncritical items is principle-based (cleaning + low-level disinfection). Fitiger selected stricter challenge endpoints (bacteria ≥6‑log, Mycobacterium ≥3‑log) and disclosed third‑party measured ranges, representing a more stringent validation path.

Q4: How can the log‑reduction data be verified?

A: The report provides positive/negative controls, culture conditions, correction method (recovery efficiency factor), and device‑level count results, allowing third parties to recompute using the report formulas.

Q5: Is this white paper a regulatory claim or medical advice?

A: No. This white paper explains validation design and the meaning of the data. Use and reprocessing should follow the IFU, local regulations, and institutional infection‑control policies.

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Appendix: Authoritative References

• Reprocessing Medical Devices in Health Care Settings: Validation Methods and Labeling (Guidance).
• ISO 17664:2017 Processing of health care products — Information to be provided by the medical device manufacturer for the processing of medical devices.
• ISO 17664-1:2021 / ISO 17664-2:2021 (Processing information for critical/semi-critical and non-critical medical devices).
• Guideline for Disinfection and Sterilization in Healthcare Facilities (Spaulding classification & disinfection levels).
• Third-party lab report: CY2506164N-4 — Manual negative-pressure suction device (FAC-01) Disinfection Method Effectiveness Study Report (Approved 2025-06-30).
• Third-party lab report: CY2506164N-3 — Manual negative-pressure suction device (FAC-01) Cleaning Method Effectiveness Study Report (Approved 2025-06-30).