Philips HeartStart XL M4735A Defibrillator

Philips HeartStart XL M4735A Monitor/Defibrillator

The Philips HeartStart XL M4735A is a high-performance defibrillator and monitor designed to meet advanced resuscitation and monitoring needs. This semi-automatic external defibrillator offers two modes of operation—Automated External Defibrillation (AED) Mode and Manual Mode—providing versatile options for both defibrillation and pacing. In AED mode, it analyzes the patient’s ECG and advises on shock delivery with clear voice prompts and display messages. In Manual Mode, it grants full control over energy settings, synchronized cardioversion, and optional noninvasive pacing. The device features multi-functional electrodes with slide-off adult paddles that reveal pediatric electrodes, ensuring safe treatment for all age groups. With a rapid charge time (0 to 360 joules in less than 3 seconds on battery), robust battery life, and built-in diagnostics, the HeartStart XL M4735A is engineered for speedy response in emergencies.

Key Features

• Dual-Mode Operation:
  • AED Mode: Analyzes the ECG, provides voice prompts and visual messages, and advises shock delivery.
  • Manual Mode: Allows manual control of defibrillation energy settings, synchronized cardioversion, and noninvasive pacing.
• Multi-Functional Electrodes:
  • Utilize the same pads for both pacing and defibrillation; adult electrodes slide off to expose pediatric electrodes.
• Rapid Charging:
  • Charges from 0 to 360 joules in less than 3 seconds with battery power, ensuring readiness during emergencies.
• Integrated Monitoring & Recording:
  • 12-lead ECG monitoring with selectable leads and configurable alarm settings.
  • Built-in thermal array recorder stores up to 28 events with detailed annotations.
• User-Friendly Interface:
  • Bright 5-inch display (available in EL or LCD versions) provides clear visual feedback of patient status.
  • Intuitive controls and preset heart rate alarms simplify operation during high-pressure situations.
• Robust Battery System:
  • Rechargeable sealed lead-acid battery ensures up to 100 hours of monitoring or multiple full-energy discharges.
• Additional Optional Modules:
  • External pacemaker and SpO₂ modules can be added for enhanced patient care.

Detailed Specifications

Physical Specifications

• Dimensions:
  • Height: 7.5 in (19 cm)
  • Width: 14.8 in (37.6 cm)
  • Depth: 13.7 in (34.6 cm)
  • Weight: 13.2 lbs (6 kg)

Defibrillator Specifications

• Waveform: Damped sinusoidal (Lown)
• Output Energy Options:
  • Available settings: 2, 3, 5, 7, 10, 20, 30, 50, 70, 100, 150, 200, 300, and 360 joules
• Charge Control:
  • Operated via push-button on the apex paddle and front panel
• Charge Time:
  • <3 seconds to 360 joules with battery; <15 seconds on AC
• Armed Indicators:
  • Charge done tone, charge done lamp on the apex paddle, and energy available indicated on the display
• Paddle Configuration:
  • Standard adult paddles (83 cm²) that slide off to reveal pediatric electrodes (21 cm²)
  • 10 ft (3 m) paddle cord; full range of internal paddles available
• Optional Paddle Contact Indicator:
  • 3-color LED bar graph on the sternum paddle (optional)

Monitor & Recorder Specifications

• ECG Inputs:
  • ECG viewing via paddles or patient cable; selectable leads (I, II, III, aVR, aVL, aVF, V Leads, etc.)
  • “Leads Off” message and dashed baseline alert for disconnected leads
• Display:
  • 5-inch diagonal display (EL or LCD – TFT Color)
  • Resolution: 320 x 240; Sweep Speed: 29 mm/sec nominal
  • Viewing time: 4 seconds
• Heart Rate:
  • Digital readout from 15 to 300 BPM with three preset high/low alarm pairs (optional configurable pairs)
• Thermal Array Recorder:
  • Stores and prints 3 seconds pre- and 8 seconds post-event data for up to 28 events
  • Annotates events with time, date, heart rate, ECG/defibrillator mode, selected/actual delivered energy, peak current, and patient impedance
  • Recorder configurable for real-time or 6-second delayed operation
• Paper Output:
  • Paper size: 50 mm x 30 m (100 ft)

Battery Specifications

• Type: Rechargeable sealed lead-acid battery, 4 Ah, 12 V nominal
• Charge Time:
  • Approximately 2 hours to 90% capacity; 18 hours to full capacity
• Capacity:
  • Up to 2½ hours of monitoring, 50 full-energy discharges, or 1 hour of monitoring/recording
• Battery Indicators:
  • Illuminated LED during charging; LOW BATTERY message when capacity is low

Optional Modules

• External Pacemaker (Optional):
  • Current Pulse Amplitude: 10–200 mA
  • Pulse Width: 20 msec; Rate: 40–180 ppm; Modes: Demand or Fixed Rate
  • Refractory Period: 340 msec (for 40–80 ppm) or 240 msec (for 90–180 ppm)
• SpO₂ Module (Optional):
  • Measurement Range: 0–100%
  • Accuracy: ±2.5% (65–80%) or ±1.5% (80–100%); Resolution: 1%; Averaging: 8 beats
  • Alarm delay: 10 seconds after low threshold is reached; INOP alerts for sensor issues
• Advisory Mode (Optional):
  • Analysis time: 7–10 seconds; default energy protocols: 200J, 200J, 360J; stores ~200 events and 50 ECG strips
• Waveform:
  • Damped sinusoidal (Lown)