Cited by 90Diabetes Management and ResearchIntravenous Infusion Technology and SafetyDiabetes Management and Education

Randomized Trial of Infusion Set Function: Steel Versus Teflon

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Patel, Parul J., Benasi, Kari, Ferrari, Gina, Evans, Mark G., Shanmugham, Satya, Wilson, Darrell M., Buckingham, Bruce A.·2014·Diabetes Technology & Therapeutics

Abstract

Background: This study compared infusion set function for up to 1 week using either a Teflon ® (Dupont ™ , Wilmington, DE) catheter or a steel catheter for insulin pump therapy in type 1 diabetes mellitus. Subjects and Methods: Twenty subjects participating in a randomized, open-labeled, crossover study were asked to wear two Quick-Set ® and two Sure-T ® infusion sets (both from Medtronic Minimed, Northridge, CA) until the infusion set failed or was worn for 1 week. All subjects wore a MiniMed continuous glucose monitoring system for the duration of the study. Results: One subject withdrew from the study. There were 38 weeks of Sure-T wear and 39 weeks of Quick-Set wear with no difference in the survival curves of the infusion sets. There was, however, a 15% initial failure rate with the Teflon infusion set. After 7 days, both types of infusion sets had a 64% failure rate. Overall, 30% failed because of hyperglycemia and a failed correction dose, 13% were removed for pain, 10% were pulled out by accident, 10% had erythema and/or induration of>10 mm, 5% fell out because of loss of adhesion, and 4% were removed for infection. The main predictor of length of wear was the individual subject. There was no increase in hyperglycemia or daily insulin requirements when an infusion set was successfully used for 7 days ( n =25 of 77 weeks). Conclusions: We found no difference between steel and Teflon infusion sets in their function over 7 days, although 15% of Teflon sets failed because of kinking on insertion. The strongest predictor of prolonged 7-day infusion set function was the individual subject, not the type of infusion set.

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Crossref · 10.1089/dia.2013.0119

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  • The overall EIS survival rate by the end of day 7 was greater than previously reported survival rates for standard IIS devices worn for similar durations (69%, 63%, 43%, 33%, and 32%).

    “The overall EIS survival rate of 77.8% (95% CI: 76.2–79.3) by the end of day 7 was greater than previously reported survival rates of 69% (n = 40 total participants and 80 total steel cannula sets),9 63% (n = 40 total participants, 80 total soft cannula sets),9 43% (n = 20 total participants, 40 total sets in non-lipohypertrophied tissue),18 33% (n = 20 total participants and 40 total sets in lipo”

    From Evaluation of Extended Infusion Set Performance in Adults with Type 1 Diabetes: Infusion Set Survival Rate and Glycemic Outcomes from a Pivotal Trial (2022) · cites this paper as [8]

    The citation is attached to the claimed 69% steel and 63% soft-cannula survival rates. The paper’s Results instead report that, at the end of day 7, 32% of steel sets and 33% of Teflon sets were functioning (page unavailable). (LLM, conf=0.88)

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  • Silent occlusions contribute to the occurrence of unexplained hyperglycemia and glycemic variability in patients using CSII.

    “Based on our findings as well as previous reports,15,16,18 we believe that silent occlusions contribute to the occurrence of unexplained hyperglycemia and glycemic variability in patients using CSII.”

    From Reduced Silent Occlusions with a Novel Catheter Infusion Set (BD FlowSmart): Results from Two Open-Label Comparative Studies (2016) · cites this paper as [15]

    The Discussion (page not available) describes unexplained hyperglycemia in CSII users that resolves after changing the infusion set, and reports unexpected hyperglycemia and/or infusion-set occlusion. It does not identify those occlusions as silent or establish that they contribute to glycemic variability. (LLM, conf=0.84)

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  • A 15% failure rate of polymer catheters over the 8-h period following insertion was observed by Patel et al., and nearly 9% of soft cannula insertions failed within a 6-h period by Renard et al.

    “Furthermore, a 15% failure rate of polymer catheters (blood glucose value of >250 mg/dL and not decreasing at least 50 mg in 1 h post–correction bolus) over the 8-h period following insertion was observed by Patel et al.15 and in nearly 9% of soft cannula insertions within a 6-h period by Renard et al,16 suggesting that existing polymer catheters have a tendency to fail upon insertion.”

    From Reduced Silent Occlusions with a Novel Catheter Infusion Set (BD FlowSmart): Results from Two Open-Label Comparative Studies (2016) · cites this paper as [15]

    The Results report a 15% failure rate on initial insertion of Teflon catheters due to kinking, detected hours later. They do not specify that all 15% failed within 8 hours; the Results describe those failures as occurring on the first day. The Introduction also gives a different primary failure threshold (>300 mg/dL), though the analysis included eight events above 250 mg/dL with an unsuccessful correction bolus. The Renard finding has a separate citation and is not judged here. (LLM, conf=0.88)

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  • Patel et al. found that the strongest predictor of IIS failure was by individual rather than IIS type.

    “However, in an open-label crossover study comparing 90° Teflon with steel, Patel et al. found that the strongest predictor of IIS failure was by individual rather than IIS type.3”
  • Detection of true causative associations between IIS failure rates and IIS characteristics will require prospective randomization, likely using each individual as their own control.

    “Ultimately, detection of true causative associations between IIS failure rates and IIS characteristics will require prospective randomization, likely using each individual as their own control in light of the findings by Patel et al. 3”

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Authors
Patel, P. J., Benasi, K., Ferrari, G., Evans, M. G., Shanmugham, S., Wilson, D. M., & Buckingham, B. A.
Affiliations
  • Stanford Medicine (US)
  • Stanford Medical Center
Venue
Diabetes Technology & Therapeutics
Published
2014-01
Volume
16
Issue
1
Pages
15-19
ISSN
  • 1520-9156 (ISSN-L)
  • 1557-8593
OpenAlex
W1972348237
Cited by
90
References
17
Citations by year
2026: 2 · 2025: 2 · 2024: 8 · 2023: 8 · 2022: 15 · 2021: 10 · 2020: 5 · 2019: 6 · 2018: 5 · 2017: 6 · 2016: 11 · 2015: 8 · 2014: 4
FWCI
6.04
Type
journal article
Language
en
Open access
Locations
  • Diabetes Technology & Therapeutics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Genentech
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Physical Sciences › Engineering › Biomedical Engineering › Intravenous Infusion Technology and Safety
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Education
Keywords
Teflon catheter, insulin pump therapy, type 1 diabetes, continuous glucose monitoring, hyperglycemia, insulin requirement
MeSH terms
Adolescent, Adult, Blood Glucose, Catheterization, Child, Diabetes Mellitus, Type 1, Equipment Design, Female, Glycated Hemoglobin, Humans, Hyperglycemia, Hypoglycemic Agents, Infusions, Intravenous, Insulin, Male, Monitoring, Physiologic, Polytetrafluoroethylene, Steel, Time Factors, Blood Glucose Self-Monitoring, Body Mass Index, Cross-Over Studies

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