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15
Design and Theory of Operation
SIGMA Manual Number 41019
Revision AA
If the pump is currently operating in mL/hr delivery mode, the bolus rate value is entered in mL/hr
and the volume is entered in milliliter (mL). If the pump is operating in a non-mL/hr delivery mode
(for example mcg/kg/min), the bolus amount would be entered in mcg/kg however the ML/HR soft
key may be pressed in the setup screen to enter the bolus information in mL/hr format.
In either mode, the time is entered in minutes and seconds (min:sec). Limits are placed on the mini-
mum and maximum amount of time for the bolus delivery. The limit constraints are contained
within the software of the Spectrum pump and are necessary to control the maximum or minimum
flow rate of the bolus infusion.
The accuracy of the bolus volume is dependent upon the resultant flow rate that is obtained from the
calculation of volume to be delivered in the time requested. For example, if the maximum bolus vol-
ume is 300 mL, the maximum flow rate is obtained with a bolus time of 18:02 (min:sec) or a flow
rate of approximately 999 mL/hr. Using this maximum bolus volume, and delivering the volume in
the shortest amount of time, the mean value of 302 mL ±5% may be expected. Whereas using a min-
imum bolus volume (.5 mL), and delivering the volume in a reasonably short amount of time (1 min-
ute), the mean value of .52 mL ±16% may be expected.
Technical
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Type of pump - volumetric infusion pump.
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Operating principle - linear peristaltic
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Patient leakage: <15 micro amps, normal condition; <50 micro amps, single fault condition.
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Battery type: 7.2-volt battery pack consisting of (2) 3.6V/1.8 Ampere-hr rechargeable lith-
ium ion, or 7.2-volt battery pack consisting of (2) 3.7V/1.75 Ampere-hr rechargeable lith-
ium ion.
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Alarms:
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Air-In-Line
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Downstream Occlusion
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Upstream Occlusion
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Door Open, Door Not Latched
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Low and Depleted Battery
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AC Applied / Removed
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Battery Not Detected
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Infusion Complete
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Secondary Complete
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Secondary Delivery
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Primary Delivery
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User Inactivity
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Unload Set Caution
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System Errors
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Incomplete Titration Entry
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Slide Clamp Closed
NOTE:
For additional technical specifications, refer to the SIGMA Spectrum Operator’s
Manual.