Philips Alice PDX Polysomnography PSG Device

How Philips Alice PDx Works

During a sleep study, appropriate sensors are connected to the patient and the Alice PDx recorder collects physiological information while the patient sleeps.

Depending on the configuration, measurements can include:

• Airflow Monitoring: Airflow sensors can record breathing through the nose and mouth, helping clinicians assess changes or interruptions in airflow during sleep.
• Respiratory Effort: Respiratory-effort sensors monitor chest and abdominal movement to help distinguish different patterns of breathing disturbance.
• SpO2 and Pulse Rate: A pulse-oximetry sensor measures oxygen saturation and pulse rate during the recording period. Changes in oxygen saturation can provide useful information when evaluating sleep-related breathing problems.
• ECG Monitoring: With the optional ECG configuration, the system can acquire ECG information for additional cardio-respiratory assessment. Philips lists optional ECG expansion capabilities for the Alice PDx.
• EEG, EOG and EMG: With the optional ExG configuration, the Alice PDx can acquire neurophysiological signals including EEG/EOG and EMG channels. This expands its use for more comprehensive sleep-study applications.
• Body Position and Snoring: The system can also record body position and snoring-related information, providing additional context for interpreting nighttime respiratory events.

Key Features of Philips Alice PDx

• Portable Sleep Diagnostic System

The compact Alice PDx is designed for portable sleep testing and can be used outside a conventional sleep laboratory when clinically appropriate. Philips describes it as an at-home diagnostic recording device for OSA screening and cardio-respiratory sleep-disorder assessment.

• Multiple Physiological Parameters

The base configuration records pressure-based flow with snore, thermal airflow, respiratory effort, body position, SpO2, pleth, pulse rate and a patient marker. Optional ECG and ExG configurations provide additional channels.

• Good Study Indicator

The device includes a Good Study Indicator, which helps indicate the amount of good-quality data collected during the recording period. This can help identify recordings where sensor application or data quality may need attention.

• Compact and Lightweight Construction

Philips lists the Alice PDx unit at approximately 12.7 × 7.62 × 5.08 cm and approximately 230 g without batteries, making it suitable for portable diagnostic applications.

• Connection with Compatible Respironics Therapy Devices

Philips documentation states that Alice PDx can connect with compatible Respironics therapy devices through appropriate cables to acquire additional therapy information alongside the sleep-study data.

Technical Specifications

Philips Alice PDx for Sleep Disorder Diagnosis

Sleep disorders can involve abnormalities in breathing, oxygen levels, brain activity, heart rhythm, muscle activity or sleep-related movement. A suitable sleep study allows these parameters to be recorded together rather than relying only on symptoms reported by the patient.

The Alice PDx can therefore support diagnostic assessment by collecting objective overnight information.

• Obstructive Sleep Apnea Assessment

The system can record airflow, respiratory effort, oxygen saturation, snoring and other parameters relevant to OSA evaluation.

• Cardio-Respiratory Sleep Assessment

Optional ECG and other channels can provide additional information when a broader cardio-respiratory evaluation is required.

• Follow-Up Studies

Philips identifies Alice PDx for follow-up as well as initial diagnostic assessment, allowing appropriate patients to undergo repeat sleep testing when clinically indicated.

• Portable and Home-Based Testing

Its portable design allows suitable patients to undergo sleep testing outside a traditional laboratory. However, the appropriate type of sleep study should always be determined by a qualified healthcare professional.

Philips Alice PDx Sleep Study Workflow

A typical sleep-diagnostic process may involve:

• Clinical Assessment – The patient is evaluated by a qualified healthcare professional.
• Test Selection – The clinician determines whether PSG or another sleep test is appropriate.
• Sensor Application – Required sensors are positioned according to the selected diagnostic protocol.
• Overnight Recording – Alice PDx records the selected physiological parameters.
• Data Transfer – Recorded information is transferred for analysis using the applicable system and software.
• Professional Interpretation – A qualified clinician reviews the recorded data.
• Treatment Planning – If a sleep disorder is identified, appropriate treatment can be recommended.

Philips also provides Sleepware G3, a software platform used with Alice sleep-testing systems for acquisition, scoring and physician review.

Applications of Philips Alice PDx

• Sleep Laboratories

The device can be incorporated into sleep-diagnostic workflows where portable or expanded sleep testing is appropriate.

• Hospitals

Hospitals can use suitable sleep-diagnostic equipment for evaluating patients with suspected sleep-related breathing disorders.

• Diagnostic Centres

Sleep and diagnostic centres can use portable sleep-recording systems for appropriate diagnostic services.

• Respiratory Clinics

Respiratory specialists may use sleep-study data as part of the assessment of suspected sleep-related breathing problems.

• Home Sleep Testing

The portable design makes Alice PDx suitable for appropriate home-based diagnostic workflows. Philips specifically describes it as a portable at-home diagnostic recording device.