® | Minimed 508 |
Summary
The Minimed 508 is very similar in physical design as its predecessors the 507 and 507C, but with many additional software features added, as well as the addition of an optional remote control. The 508 supports flexible insulin delivery with 3 available basal programs and Audio and extended bolus options. It has a large backlit LCD screen for displaying information and is programmed with the use of 4 flush buttons on the front.
Technical Feature Details
Functional Feature Details
Basal rates can be programmed for between 0.0 to 35.0 units per hour in 0.1 unit increments. A user-programmable hourly basal cap is set at the factory for 2.0 units/hour (can be increased up to the 35.0 units per hour hard limit). Each basal profile can contain up to 48 segments which consist of the rate, start time, and duration. The segments can range from 30 minutes to 24 hours, in 30 minute increments.
The Audio bolus must be enabled within the "Setup II" menu before it can be used and a step size of either 0.5 or 1.0 units selected. To deliver an audio bolus, the "up" scroll button is pressed multiple times until the desired dosage is reached, followed by a press of the "act" button (for example, with a step size of 0.5 you would press the button 4 times to get a 2.0 unit bolus). Each time the button is pressed, a beep is sounded. Once the "act" button is pressed, the pump sounds a series of beeps to verify the dosage, and a second press of the "act" button is required to verify and activate delivery.
The Square Wave bolus program is an extended bolus which requires programming in the bolus amount as for a Normal bolus, plus a duration which can vary between 30 minutes to 8 hours in 30 minute increments. The "Variable Bolus" setting must be turned on under the "Setup II" screen before this feature can be used.
The Dual Wave bolus program is a variation of an extended bolus, and is basically a combination of a Normal bolus and a Square Wave bolus. First, the user is prompted to enter a bolus of insulin for immediate delivery (the Normal portion). Then, the user is prompted to enter an extended bolus amount with time duration (the Square Wave portion). As with the Square Wave bolus, the "Variable Bolus" setting must be turned on under the "Setup II" screen before this feature can be used.
It should be noted that a Normal or Audio bolus may be programmed concurrently with, and on top of, a Square Wave bolus or the extended portion of a Dual Wave bolus.
The main pump screen displays the time. By pressing the "sel" button, the user can step through the other 8 screens to access other features. All nine of these screens are listed below.
With special equipment available to medical providers, additional information can be retrieved from the pump using its two IR interface ports. This includes last 450 boluses with time/date, approximately 90 days of combined bolus/basal daily insulin totals, last 50 alarms with time/date, and last 50 primes with time/date.