Minimitters
The Mini-Logger 2000 is a tool that monitors bodily conditions of a subject
and records them for later analysis. The records can then be downloaded into a
computer and graphed. The system consists of a telemetric heart rate monitor,
a temperature probe, and an activity switch. The heart rate monitor reads
either the heart rate or the inter-beat interval from electrical pulses in the
surface of the skin. The activity monitor is a mercury switch that is worn
on the wrist and registers movement.
Attaching the Mini-Logger to a
person
|
- Attach the activity sensor to a wrist
- Attach the heart rate watch to the same wrist
- Attach the activity sensor to the other wrist
- Wrap the telemetric heart-rate monitor around the subject's chest and attach
velcroe
- Place temperature probe in the navel for external skin temperature. The
tympanic canal (in the ear) may be used for internal temperature.
The Mini-Logger 2000 controls start time, stop time, and sensor configuration
according to its software's settings. Any information collected by the
minimitter may be downloaded to a computer for graphing. The minimitter
has a mark button to indicate times of irregularity. These marks appear as
triangle on the X-axis of the graphs (see below).
Sample Graphs and Analysis
|
- This is a graph of the subject's circadian rhythms over a 48-hour period.
The red triangles are marker points for irregularities in the readings. The activity
graph can be used as a comparison for sleep/awake time. While the subject was asleep,
the heart rate lowered and stabilized and the external skin temperature stabilized.
- This is a graph of the circadian rhythms of a different subject over 23
½
hours. Once again, activity may be used to determine the status of the subject. The heart rate drops considerably and
stabilizes along with the temperature during sleep.
