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The Actiwatch Range (Left to right; AW16/64, AWL,
AW Score)
Actigraphy provides a means for clinicians and researchers to measure
sleep quality in individuals suffering from sleep disorders, such as
insomnia, PLM, sleep apnea and others. An actigraph can also be used in
many other applications.
Actiwatches are small, rugged, actigraphy-based data loggers that
record a digitally integrated measure of gross motor activity. Each
model of Actiwatch actigraph is equipped with a highly sensitive
accelerometer as well as the ability to record data from a second input
or sensor. This second input makes them very useful for a wide variety
of research or clinical applications.
Actiwatch actigraphs currently come in the following models (new
models are in development) :
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AW-16 & AW-64 (with integral time mark generator)
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AW-L (with integral light sensor)
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AW-Score (with integral subjective scoring)
Actiwatch Applications
Activity level is recognized as a valuable indicator for medical
problems and can provide answers to many research questions. Activity
levels correlate with sleep/wake patterns, pain level, mood, energy
expenditure, fatigue/alertness and other quantifiable parameters. An
Actiwatch actigraph also provides an objective record for tracking and
documenting normal and abnormal sleep/wake patterns.
An example of the use of the Actiwatch is:
Sleep/Wake Patterns and General Activity Levels
A digitally integrated recording of wrist activity is a reliable
indicator of Sleep/Wake state. The Actiwatch is an actigraphy device
that is the size of a standard wrist watch. It allows for the recording
of the smallest movements for days, weeks, or even months.
When worn on the wrist, an Actiwatch actigraph can generate an
Activity record like the one shown below to be used as a tool to
document:
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Sleep/Wake Patterns
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Sleep Disorders
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Circadian Rhythms Disorders
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Disturbances brought on by Shift Work
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Basic Activity Levels
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Compliance with Exercise Routines
2 Day Actogram
Sleep Analysis
Actiwatches have been used in many research and clinical studies. Click
here to download a bibliography.
Click
Here to Download a Datasheet (PDF)
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AW16 & 64 Models
AW-16 & AW-64: Actigraphs with Integral Event Marker
These are the standard Actiwatch actigraph models. Actiwatch-16s and
-64s both have an event marker button that allows for the wearer to log
events of significance at the time they occur in the data record. Most
often this feature is used to depict Bed Times and Get up Times.
Like all of our Actiwatches, they use actigraphy principles to record
activity information and can be used for monitoring sleep quality.
The AW-64 is the actigraphy device of choice for diagnosing insomnia
and documenting circadian rhythms disorders.
AW-16 & AW-64 Actigraph Specifications:
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Weight: 16 grams
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Size: 28 x 27 x 10 mm
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Non-Volatile Memory: AW-16 = 16 Kbytes, AW-64 = 64 Kbytes
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Recording Time at one minute sample interval: AW-16 = 11 days,
AW-64 = 45 days
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Battery Life: 180 days
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Waterproof to IEC Standard 60529 IPX7 (water tight to a depth of
one meter for 30 minutes)
Click
Here to Download a Datasheet (PDF)
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AWL (with Light Sensor)
AW-L Actigraph with Integrated Light Sensor
The Actiwatch-L actigraph has a small, very high performance light
sensor integrated into its case in place of an event marker. With each
activity record that is recorded, the light level is also recorded in
Lux.
Like all of our Actiwatches, the AW-L uses actigraphy principles to
record activity information and can be used to analyze sleep quality.
The AW-L may be used to verify time, length and frequency of
treatments for SAD patients (Seasonal Affective Disorder). These values
may be correlated with changes in sleep/wake patterns from the
actigraphy record.
AW-L Actigraph Specifications
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Weight: 16 grams
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Size: 28 x 27 x 10 mm
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Non-Volatile Memory: 64 Kbytes
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Recording Time at one minute sample interval:15 days
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Lux Range: 0.1 to 150,000
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Battery Life: 180 days
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Waterproof to IEC Standard 60529 IPX7 (water tight to a depth of
one meter for 30 minutes)
Sample AW-L Actigram
Click
Here to Download a Datasheet (PDF)
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AW-Score Actigraph with Subjective Scoring
Like the other Actiwatches, the AW-Score actigraph uses actigraphy
principles to record activity information and can be used to analyze
sleep quality.
In addition to the objective activity data, Actiwatch-Score allows
for recording subjective scores for any parameter that can be classified
from 0-15 (scale is programmable), providing a strong enhancement to
Patient Diaries. The unique combination of activity and scoring provides
an excellent way to correlate activity with other subjective data
normally collected by a patient diary. It can also be used to document
the effectiveness of interventions on conditions of interest.
The Actiwatch-Score includes a programmable alarm to prompt the
patient to enter a quantifiable score. Alarms can be set to a schedule
or to sound at random intervals.
AW-Score Actigraph Specifications
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Weight: 19 grams
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Size: 31 x 28 x 10 mm
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Scoring Scale: 0 to 15
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Non-Volatile Memory: 32 kbytes
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Recording Time at one minute sample interval: 22 days**
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Drip tight to IEC Standard 60529 IP52 (resistant to dripping and
light splashing of liquids)
**Recording time will vary depending upon the alarm schedule that
has been programmed.
Sample AW-Score Graphs
Pain Intensity Scores Before Treatment
Pain Intensity Scores After Treatment
Click
Here to Download a Datasheet (PDF)
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Site by Rob Jones.
Copyright © 2008 Linton Instrumentation . All rights reserved.
Revised: June 09, 2008
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