BF-II Digital Spirometer with PC Connectivity, Data Storage & Printing

Overview

The BF-II Digital Spirometer is a compact, portable clinical spirometry device engineered for precision measurement of key pulmonary ventilation parameters—including forced vital capacity (FVC), forced expiratory volume in one second (FEV₁), tidal volume (VT), maximum voluntary ventilation (MVV), and instantaneous flow rates—under standardized breathing maneuvers. It operates on the principle of infrared photoelectric flow sensing, utilizing a non-contact, low-inertia optical transducer to detect real-time airflow velocity across the laminar-to-turbulent transition range typical of human expiration. This sensor architecture ensures high repeatability (>98% intrasession coefficient of variation per ATS/ERS guidelines) and minimal drift during repeated use. The instrument integrates a low-power microcontroller unit (MCU) based on CMOS technology, coupled with LED-based digital display and membrane switch interface, enabling stable operation in diverse clinical environments—from outpatient respiratory clinics to occupational health screening stations and sports medicine laboratories.

Key Features

• Infrared photoelectric flow sensor with zero mechanical wear, optimized for dynamic flow response across 20–300 L/min range
• Dual power mode: AC 220 V mains operation or internal rechargeable battery (up to 8 hours continuous use)
• On-device LED display with real-time waveform visualization and numeric readout of VC, FEV₁, VT, MVV, and peak expiratory flow (PEF)
• USB 2.0 interface compliant with CDC ACM class drivers for plug-and-play connectivity to Windows-based PCs
• Embedded firmware supports automatic calibration verification via built-in reference pulse generator and user-initiated zero-flow compensation
• Low power consumption (≤6 W), CE-marked housing with IP20 ingress protection for clinical desktop deployment

Sample Compatibility & Compliance

The BF-II Spirometer is validated for use with standard disposable mouthpieces (ISO 21647:2020 compliant) and bacterial/viral filters meeting ISO 10993-5 biocompatibility requirements. It conforms to the essential performance criteria outlined in ISO 26782:2022 (Respiratory function—Spirometers) and aligns with technical specifications referenced in ATS/ERS 2005 and 2019 spirometry standardization documents. While not certified for standalone regulatory submission under FDA 510(k) or EU MDR Class IIa, its measurement accuracy (≤±5% FS across all primary parameters) satisfies routine clinical screening thresholds defined in national occupational health protocols (e.g., GBZ 188–2014 in China, OSHA 1910.134 Appendix D). Device firmware includes audit-ready event logging for calibration date, operator ID (via PC software input), and test session timestamps—supporting GLP-aligned documentation workflows.

Software & Data Management

A dedicated Windows application (v3.2+, compatible with Windows 10/11 64-bit) enables full bidirectional communication with the BF-II unit. The software provides automated data capture of up to 200 test sessions per patient record, including time-stamped flow-volume loops, volume-time curves, and derived indices. All datasets are stored in encrypted SQLite format with SHA-256 hash integrity verification. Export options include CSV (for statistical analysis in SPSS or R), PDF (with customizable clinic header and signature field), and direct thermal printer output (ESC/POS protocol compatible). Audit trail functionality logs user login/logout events, parameter edits, and report generation actions—meeting foundational traceability requirements for internal quality assurance and ISO 9001:2015 clause 8.5.2.

Applications

The BF-II Spirometer serves as a primary assessment tool in multiple evidence-based practice domains: longitudinal monitoring of obstructive and restrictive ventilatory defects in pulmonology outpatient settings; pre-employment and periodic surveillance spirometry for workers exposed to respirable dusts or vapors; perioperative pulmonary risk stratification prior to thoracic or upper abdominal surgery; functional capacity evaluation in geriatric wellness programs; and objective quantification of ventilatory adaptation during endurance training regimens. Its portability and battery operation make it suitable for field deployments in mobile health units and rural primary care centers where infrastructure limitations preclude use of larger desktop spirometers.

FAQ

Is the BF-II Spirometer FDA-cleared or CE-marked for diagnostic use?
The device carries CE marking under the EU Medical Device Directive 93/42/EEC (Class I, self-certified) and complies with harmonized standards EN ISO 13485:2016 and EN ISO 26782:2022. It is not FDA 510(k)-cleared and is intended for screening and monitoring—not definitive diagnosis—per manufacturer labeling.
Can the software generate reports compliant with ATS/ERS reporting templates?
Yes. The PC software includes configurable report layouts that map to ATS/ERS 2019 minimum reporting standards, including predicted value derivation (using NHANES III equations), lower limits of normal (LLN), and Z-score calculation for FEV₁/FVC ratio.
What is the recommended calibration frequency and procedure?
A 3-L syringe calibration check is advised before each daily use session per ISO 26782:2022 section 7.3. Full electronic calibration requires authorized service center intervention every 12 months or after 5,000 measured breaths.
Does the device support Bluetooth or wireless data transmission?
No. Data transfer is exclusively via USB 2.0 cable to ensure deterministic latency and electromagnetic compatibility in clinical environments with high RF noise density.
Are consumables such as mouthpieces and filters included in the base configuration?
The standard package includes one reusable calibrated flow head, two disposable mouthpieces, and one hydrophobic filter. Additional consumables are available as optional SKUs with lot-traceable packaging.