Evidence map›Paper›PMID 26370244›Full record

Trial reportJournal of diabetes science and technology2015

Stress Testing of an Artificial Pancreas System With Pizza and Exercise Leads to Improvements in the System's Fuzzy Logic Controller.

Richard Mauseth, Sandra M Lord, Irl B Hirsch, Robert C Kircher, Don P Matheson, Carla J Greenbaum

Registry-linked trialAbstract readClinical Trial
In one paragraph

Trial report in Journal of diabetes science and technology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03748251 (Demystifying the Pizza Bolus), which is not on this map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT03748251 nacompletednot on this mapstarted 2018, after this paper: background citation

Demystifying the Pizza Bolus: the Effect of Dough Fermentation Time on Glycemic Response in Children With Type 1 Diabetes Mellitus Receiving Sensor-augmented Pump Therapy

TypeinterventionalSponsorUniversity of Campania Luigi VanvitelliRan2018 to 2018Enrolled38ConditionsDiabetes Mellitus, Type 1Armsthe patients ate a pizza that fermented for 8 hours, the patients ate a pizza that fermented for 24 hours
3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

  1. Observational
  2. Article
  3. Automated Insulin Delivery Algorithms.Diabetes spectrum : a publication of the American Diabetes Association · 2019
    Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Review
  10. Artificial Intelligence Methodologies and Their Application to Diabetes.Journal of diabetes science and technology · 2018
    Article
  11. Review
  12. Article
  13. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Richard MausethDepartment of Pediatrics, University of Washington, Seattle, WA, USA Dose Safety, Inc, Seattle, WA, USA richardmausethmd@msn.com.
Sandra M LordBenaroya Research Institute, Seattle, WA, USA.
Irl B HirschSchool of Medicine, University of Washington, Seattle, WA, USA.
Robert C KircherDose Safety, Inc, Seattle, WA, USA.
Don P MathesonDose Safety, Inc, Seattle, WA, USA.
Carla J GreenbaumBenaroya Research Institute, Seattle, WA, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundUnder controlled conditions, the Dose Safety artificial pancreas (AP) system controller, which utilizes "fuzzy logic" (FL) methodology to calculate and deliver appropriate insulin dosages based on changes in blood glucose, successfully managed glycemic excursions. The aim of this study was to show whether stressing the system with pizza (high carbohydrate/high fat) meals and exercise would reveal deficits in the performance of the Dose Safety FL controller (FLC) and lead to improvements in the dosing matrix.

methodsTen subjects with type 1 diabetes (T1D) were enrolled and participated in 30 studies (17 meal, 13 exercise) using 2 versions of the FLC. After conducting 13 studies with the first version (FLC v2.0), interim results were evaluated and the FLC insulin-dosing matrix was modified to create a new controller version (FLC v2.1) that was validated through regression testing using v2.0 CGM datasets prior to its use in clinical studies. The subsequent 17 studies were performed using FLC v2.1.

resultsUse of FLC v2.1 vs FLC v2.0 in the pizza meal tests showed improvements in mean blood glucose (205 mg/dL vs 232 mg/dL, P = .04). FLC v2.1 versus FLC v2.0 in exercise tests showed improvements in mean blood glucose (146 mg/dL vs 201 mg/dL, P = .004), percentage time spent >180 mg/dL (19.3% vs 46.7%, P = .001), and percentage time spent 70-180 mg/dL (80.0% vs 53.3%, P = .002).

conclusionStress testing the AP system revealed deficits in the FLC performance, which led to adjustments to the dosing matrix followed by improved FLC performance when retested.

Indexed as

AlgorithmsExerciseFuzzy LogicInsulin Infusion SystemsPancreas, ArtificialStress, PhysiologicalAdultBlood GlucoseBlood Glucose Self-MonitoringDiabetes Mellitus, Type 1Dietary CarbohydratesDietary FatsDrug Dosage CalculationsEquipment DesignFemaleHumansBlood GlucoseDietary CarbohydratesDietary FatsHypoglycemic AgentsInsulinAPartificial pancreasclosed loopfuzzy logic

Identifiers

PMID26370244
PMCPMC4667297

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.