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Micromini motionlogger

Manufactured by Ambulatory Monitoring
Sourced in United States

The Micromini-motionlogger is a compact and portable device designed for recording movement and activity data. It is a specialized piece of lab equipment used for monitoring and analyzing physical motion. The device captures movement information that can be further analyzed and interpreted by researchers or clinicians.

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6 protocols using micromini motionlogger

1

Actigraphy Measurement of Infant Sleep

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Nighttime sleep duration was measured via actigraphy (MicroMini-Motionlogger, Ambulatory Monitoring, Inc., Ardsley, New York, USA). Actigraphy is a validated tool used to measure sleep in pediatric populations, including infants and very young children (So et al., 2005 (link)). Infants wore actigraphs on their left ankle for 24 hours a day, for one week. Monitors were removed only during water-based activities. Data were downloaded from the monitors and assessed using the manufacturer’s software (Action4, Version 1.16, Ambulatory Monitoring, Inc., Ardsley, New York, USA). Although the use of sleep diaries is recommended when assessing pediatric sleep, they were not used in this study, in order to reduce participant burden and avoid potential data loss due to non-compliance with sleep diary completion (Tétreault et al., 2018 (link)).
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2

Pediatric Sleep-Wake Actigraphy Assessment

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Child movements were recorded in one-minute epochs using a micromini-motionlogger® (Ambulatory Monitoring, Incorporated) and interpreted as sleep or awake using the Sadeh algorithm provided in Action-W version 2.7.3. Following actigraphy best practice guidelines, actigraphs were worn for 7 consecutive 24-hour periods, and a parent-report sleep log was used to aid in interpreting the actigraphy data.30 Actigraphy is commonly used to index child activity/sleep patterns in healthy children, children with developmental concerns, and children born preterm.31 (link),32 (link) A minimum of five nights were required for analyses. The work of Thomas and Burr33 (link) has demonstrated that only 48 hours of data are required to assess circadian patterns via a cosinor model; therefore, we feel five nights are adequate. Each child’s raw minute-by-minute activity scores were smoothed using a moving average with a 60-minute window and then subjected to the cosinor model.
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3

Wrist Actigraphy and Sleep Diaries

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Sleep was measured via wrist actigraphy (either Micro-Mini-Motionlogger, Ambulatory Monitoring Inc, Ardsley, New York, USA (n = 12) or Actiwatch Spectrum, Philips Respronics, Bend Oregon, USA (n = 25) and sleep diaries. Participants wore wrist activity monitors on their non-dominant wrist for the entire duration of the study. Sleep was recorded in 1-min epochs and data analyzed using either the motionlogger analysis software package (Micro-Mini-Motionlogger devices) or actiware software package (Actiwatch Spectrum devices). Due to device error, actigraphy data was lost for six participants (5 African-Americans, 1 European-American). Participants completed sleep diaries within 10 min of waking, reporting on sleep onset and offset times and any wake during the sleep episode. The primary outcome measures for both actigraphy and sleep diaries was total sleep time (TST). Actigraphy has been validated against PSG [60 (link)–62 (link)].
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4

Actigraphy Assessment of Children's Sleep

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Sleep duration, wake episodes and latency were recorded for 5 nights pre- and postintervention via actigraphy (MicroMini-Motionlogger™, Ambulatory Monitoring Inc., Ardsley, NY, USA), which has good properties in detecting sleep in children (Meltzer et al., 2012 (link)). To provide sufficient measurement reliability, the following variables are reported as average times/scores over five nights (Huang et al., 2011 (link)):

Sleep onset and offset times

Sleep duration in minutes (total sleep period between onset and offset)

Minutes awake between sleep onset and offset

Sleep efficiency (total sleep time divided by time in bed)

Sleep latency (minutes taken to fall asleep)

Number of night wakings after sleep onset

Actigraphy data were augmented by parents completing a sleep diary detailing their child's bedtime and rising time, any intervals when the actigraph was removed and their perception of the child's periods of sleep.
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5

Infant Sleep Actigraphy Recording

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Infant movements during sleep were recorded in one minute epochs using a micromini-motionlogger® (Ambulatory Monitoring, Incorporated). Each infant wore the actigraph on their ankle (imbedded in a neoprene band). The actigraph data were interpreted as sleep or awake using the Sadeh algorithm provided in Action-W version 2.7.3. Following established actigraphy scoring guidelines (Acebo & LeBourgeois, 2006 ), we used the parentreport diary to index (a) time placed in bed, (b) time removed from bed in the morning, (c) any sensor removals, and (d) sleep that took place in moving objects (e.g., a car or swing). These diary-informed elements helped to clarify the usability of the actigraph data but they did not impact the actigraph sleep onset or morning rise time estimates (which were compared to the sleep diary estimates). Estimates were based on at least three 24-hour periods of valid data (Range 3 – 8 24-hour periods; M = 5.75, SD = 1.25). For the 75 enrolled families, 68 successfully completed the actigraphy recording week. The seven missing recordings reflected one equipment failure, one parent who did not want their infant to wear the actigraph, and five infants were upset by wearing the actigraph (and it was therefore removed).
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6

Objective Sleep-Wake Monitoring with Actigraphy

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The Micro-mini motionlogger (Ambulatory Monitoring Inc., Ardsley, NY) provided an objective estimate of sleep-wake patterns. The wristwatch-style device contains a biaxial piezoelectric sensor with an epoch length of 60-seconds. Families were instructed to press the event marker when attempting sleep and upon awakening. The system’s software utilized Sadeh’s algorithm, an approach validated against polysomnography in children.32 (link) Patients wore actigraphs throughout their hospitalization (up to 5 days), with most being four days.
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