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The Bistos BT-350 is a microprocessor-based cardiotocograph (CTG) engineered for continuous antepartum monitoring, displaying, and recording of the Fetal Heart Rate (FHR) and Uterine Contractions (UC/TOCO). Utilizing highly sensitive 1MHz multi-crystal pulsed Doppler probes, it tracks fetal health dynamics precisely during non-stress tests (NST). The device converts clinical biometric echoes into dual-waveform trends, offering internal computerized CTG diagnostic interpretation to assist obstetric professionals in evaluating fetal well-being before labor.
| Parameter | Specification |
| Monitored Parameters | FHR 1, FHR 2 (Twin Fetus), UC (Uterine Contraction), FM (Fetal Movement) |
| Safety Certifications | KFDA, CE, FDA |
| Display Screen | 7-inch Wide TFT Color LCD Screen (Rotatable layout) |
| FHR Technology | Pulsed Doppler with Autocorrelation processing (9-Crystal Probe) |
| Ultrasound Frequency | 0.985 MHz ($\pm$2% accuracy) |
| Ultrasound Intensity | 10 mW/$cm^2$ or less |
| FHR Measurement Range | Dual channel, 30 to 240 bpm / 50 to 210 bpm ($\pm$2%) |
| UC (TOCO) Method | External pressure transducer with DC to 0.5Hz frequency response |
| UC Measurement Range | 0 to 99 / 100 relative units (with Auto-Zero / Reference control) |
| Fetal Movement Detection | Auto-detection of dual fetal movement + manual event marker |
| Internal Trend Memory | 450 hours of continuous data retention (approx. 3 hours per patient for 150 patients) |
| Printer Mechanism | High-speed integrated Thermal Array System |
| Compatible Paper | Z-fold format, 150 mm width $\times$ 13.5 meters length |
| Printing Speed Options | 1, 2, 3 cm/min (standard tracking) or 10 cm/min (rapid trend dump) |
| Device Interfaces | RS-232C, RJ45 Ethernet LAN, USB Host (Data export), Bluetooth (Optional) |
| Main Power Input | AC 100V to 240V, 50/60Hz (Output: DC 18V, 2.5A) / Consumption: 80VA |
| Battery Option | 14.8V Rechargeable Lithium-Ion battery pack (supports up to 3–5 hours) |
| Waterproofing Grade | Transducer Probes (DOP & UC): IPX8 Rated |
| Dimensions & Weight | Main Console: 326 (W) $\times$ 276 (D) $\times$ 96 (H) mm / Net Weight: 2.8 kg |
Automated CTG Interpretation: Built-in algorithm analyzes baseline values, accelerations, decelerations, and fetal movement to display a diagnostics assessment summary on-screen or at the tail end of printouts.
Cross-Channel Verification (CCV): Automatically cross-checks FHR signals when twin monitoring is active. If the two Doppler channels register overlapping heart traces, a specialized alarm flags potential signal cross-talk or maternal signal contamination.
IPX8 Waterproof Probes: Probes are completely sealed and certified for deep water-submersion, making the system ideal for water birth environments.
DOP2 Heart Rate Offset: Includes a toggle feature that shifts the secondary twin FHR trend line vertically by +20 bpm on the grid display, preventing overlapping lines for clear legibility.
PC & Central Station Compatibility: Directly bridges into BCM-350 Central Monitoring Software via LAN or RS-232 to remotely monitor up to 16 live bedside terminals.
Flexible Graphic Modes: The 7-inch rotatable LCD panel switches smoothly between real-time rolling trace grids and giant high-visibility font layouts for bedside checking.
USB Trend Data Portability: Allows nurses to dump stored internal records directly onto a standard USB memory stick without needing an active PC network hookup.
Multi-Language Interactive Interface: Supports 13 default internal system languages combined with an on-screen visual "Quick Guide" to simplify midwife operations.
Zoom-In Print Focus: Enlarges specific FHR windows on paper to help clinicians inspect localized, highly dynamic cardiac deceleration areas closer.
Obstetric Clinics & Private Practices: Conducting routine Non-Stress Tests (NST) to verify baseline cardiac safety curves during late-stage check-ups.
Hospital Labor Rooms & Delivery Suites: Continuous cardiotocography tracking during active stages of induced labor.
Water Birth Delivery Facilities: Safe fetal monitoring using fully submerged, water-tight transducer arrays.
Bistos BT-350 Fetal Monitor Main Station
2 $\times$ Waterproof Ultrasound Doppler Probes (FHR)
1 $\times$ External Uterine Contraction Pressure Probe (UC/TOCO)
1 $\times$ Patient Handheld Event Marker Button Cable
3 $\times$ Elastic Transducer Probe Positioning Belts
2 $\times$ Packs of Z-Fold Thermal Recording Paper Grid Packs
1 $\times$ 250ml Medical Ultrasound Coupling Gel Bottle
Medical Grade External Power Adapter & Country-Specific AC Cord
User Operational Instruction & Field Service Manual
