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  • Title: Use of the Cygnus GlucoWatch biographer at a diabetes camp.
    Author: Gandrud LM, Paguntalan HU, Van Wyhe MM, Kunselman BL, Leptien AD, Wilson DM, Eastman RC, Buckingham BA.
    Journal: Pediatrics; 2004 Jan; 113(1 Pt 1):108-11. PubMed ID: 14702457.
    Abstract:
    BACKGROUND: Detection and prevention of nocturnal hypoglycemia is a major medical concern at diabetes camps. OBJECTIVE: We conducted an open-label trial of the Cygnus GlucoWatch biographer to detect nocturnal hypoglycemia in a diabetes camp, a nonclinical environment with multiple activities. METHODS: Forty-five campers (7-17 years old) wore a biographer. The biographer was placed on the arm at 6:00 PM, with the low alarm set to 85 mg/dL (4.7 mmol/L). Overnight glucose monitoring occurred per usual camp protocol. Counselors were to check and record blood glucose values if the biographer alarmed. RESULTS: Biographers were worn for 154 nights by 45 campers. After a 3-hour warm-up period, 67% of biographers were calibrated, of which 28% were worn the entire night (12 hours). Thirty-four percent of readings were skipped because of: "data errors" (65%), sweat (20%), and temperature change (16%). Reported biographer values correlated with meter glucose values measured 11 to 20 minutes later (r = 0.90). Of 20 low-glucose alarms with corresponding meter values measured within 20 minutes, there were 10 true-positive alarms, 10 false-positive alarms, and no false-negative alarms. Campers reported sleep disruption 32% of the nights, and 74% found the biographer helpful. Campers reported they would wear the biographer 4 to 5 nights each week. CONCLUSIONS: Half of the biographer low-glucose alarms that had corresponding blood meter values were true-positive alarms, and the remaining were false-positive alarms. There was close correlation between the biographer and meter glucose values. The majority of campers found the biographer helpful and would use it at home.
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