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New features and performance of a next-generation SEVEN-day continuous glucose monitoring system with short lag time.
Diabetes Technol Ther. 2009 Dec; 11(12):749-55.DT

Abstract

BACKGROUND

The purpose of this study was to evaluate new features and performance of the SEVEN PLUS System (DexCom, Inc., San Diego, CA), a real-time continuous glucose monitoring (CGM) device. This study is the first to evaluate the SEVEN PLUS device.

METHODS

Fifty-three subjects were enrolled at three U.S. centers; 43 (81%) of the subjects had type 1 diabetes mellitus, and 10 (19%) had insulin-requiring type 2 diabetes mellitus. Subjects inserted and wore either one or two sensors for 7 days. A subgroup (n = 18) wore two sensors to track precision. Subjects participated in one 8-h in-clinic session with blood draws every 15 min on study Day 1, 4, or 7 to collect laboratory reference YSI instrument (YSI, Yellow Springs, OH) and self-measured plasma glucose (SMPG) reference measurements. For the remainder of the week, CGM was used as an adjunct to SMPG during home use.

RESULTS

The overall median absolute relative difference (ARD) versus YSI was 13.0%. Zones A and B of the Clarke Error Grid of CGM measurements were 73.8% and 22.1%, respectively. Precision ARD was 15.3 +/- 6.2% (mean +/- SD). The median ARD versus SMPG was 12.1%. Sensor life (89% lasted 7 days) was improved compared to the SEVEN device. The lag time obtained with various statistical measures between CGM and YSI were similar and estimated as a median of 8 min (interquartile range, 11 min) using the Pearson correlation coefficient. No serious adverse events or infectious complications were reported.

CONCLUSIONS

The performance of this new system compares favorably to the previous SEVEN device in terms of accuracy, precision, lag time, sensor life, and rate of data capture.

Authors+Show Affiliations

AMCR Institute, Escondido, California 92026, USA. tbailey@amcrInstitute.comNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article
Multicenter Study

Language

eng

PubMed ID

20001675

Citation

Bailey, Timothy, et al. "New Features and Performance of a Next-generation SEVEN-day Continuous Glucose Monitoring System With Short Lag Time." Diabetes Technology & Therapeutics, vol. 11, no. 12, 2009, pp. 749-55.
Bailey T, Zisser H, Chang A. New features and performance of a next-generation SEVEN-day continuous glucose monitoring system with short lag time. Diabetes Technol Ther. 2009;11(12):749-55.
Bailey, T., Zisser, H., & Chang, A. (2009). New features and performance of a next-generation SEVEN-day continuous glucose monitoring system with short lag time. Diabetes Technology & Therapeutics, 11(12), 749-55. https://doi.org/10.1089/dia.2009.0075
Bailey T, Zisser H, Chang A. New Features and Performance of a Next-generation SEVEN-day Continuous Glucose Monitoring System With Short Lag Time. Diabetes Technol Ther. 2009;11(12):749-55. PubMed PMID: 20001675.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - New features and performance of a next-generation SEVEN-day continuous glucose monitoring system with short lag time. AU - Bailey,Timothy, AU - Zisser,Howard, AU - Chang,Anna, PY - 2009/12/17/entrez PY - 2009/12/17/pubmed PY - 2010/3/25/medline SP - 749 EP - 55 JF - Diabetes technology & therapeutics JO - Diabetes Technol Ther VL - 11 IS - 12 N2 - BACKGROUND: The purpose of this study was to evaluate new features and performance of the SEVEN PLUS System (DexCom, Inc., San Diego, CA), a real-time continuous glucose monitoring (CGM) device. This study is the first to evaluate the SEVEN PLUS device. METHODS: Fifty-three subjects were enrolled at three U.S. centers; 43 (81%) of the subjects had type 1 diabetes mellitus, and 10 (19%) had insulin-requiring type 2 diabetes mellitus. Subjects inserted and wore either one or two sensors for 7 days. A subgroup (n = 18) wore two sensors to track precision. Subjects participated in one 8-h in-clinic session with blood draws every 15 min on study Day 1, 4, or 7 to collect laboratory reference YSI instrument (YSI, Yellow Springs, OH) and self-measured plasma glucose (SMPG) reference measurements. For the remainder of the week, CGM was used as an adjunct to SMPG during home use. RESULTS: The overall median absolute relative difference (ARD) versus YSI was 13.0%. Zones A and B of the Clarke Error Grid of CGM measurements were 73.8% and 22.1%, respectively. Precision ARD was 15.3 +/- 6.2% (mean +/- SD). The median ARD versus SMPG was 12.1%. Sensor life (89% lasted 7 days) was improved compared to the SEVEN device. The lag time obtained with various statistical measures between CGM and YSI were similar and estimated as a median of 8 min (interquartile range, 11 min) using the Pearson correlation coefficient. No serious adverse events or infectious complications were reported. CONCLUSIONS: The performance of this new system compares favorably to the previous SEVEN device in terms of accuracy, precision, lag time, sensor life, and rate of data capture. SN - 1557-8593 UR - https://www.unboundmedicine.com/medline/citation/20001675/New_features_and_performance_of_a_next_generation_SEVEN_day_continuous_glucose_monitoring_system_with_short_lag_time_ DB - PRIME DP - Unbound Medicine ER -