Collection of Breath and Sweat to Identify Indicators of Hypoglycemia

Type 1 Diabetes Mellitus Clinical Trial

Official title:

Collection of Breath and Sweat to Identify Indicators of Hypoglycemia

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03600116
• Other study ID #: 2018P000868
• Status: Completed
• Start date: May 24, 2018
• Est. completion date: November 20, 2018

Study information

• Verified date: February 2022
• Source: Massachusetts General Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Subjects with type 1 diabetes will be observed in the diabetes research center clinic following a meal and an insulin injection. Breath and sweat samples will be collected at intervals throughout the visit, with increased frequency during hypoglycemia. Collaborators with the MITRE Corporation will perform analyses on these samples to identify any relationships between volatile organic compounds in breath and sweat and hypoglycemia.

Description:

Subjects enrolled in the study will have clinical type 1 diabetes managed with rapid acting insulin. After consent and enrollment, they will arrive to the study visit having fasted the night before. Subjects will be given a meal, and will be given an insulin injection for this meal, calculated based on their prescribed meal to carbohydrate ratio as well as a correction bolus to correct their current plasma glucose value down to 40 mg/dL based on their prescribed insulin sensitivity factor. Following the insulin injection, subjects will eat breakfast and be observed in the clinic setting. Blood, breath, and sweat samples will be collected throughout the study visit with increased frequency of collection during hypoglycemia. Collaborators with the MITRE Corporation will perform analyses on these samples to identify any relationships between volatile organic compounds in breath and sweat and hypoglycemia. After subjects reach the hypoglycemia threshold, they will be allowed to eat and drink and their blood sugar will be monitored for stability prior to discharge.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 18
• Est. completion date: November 20, 2018
• Est. primary completion date: November 20, 2018
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Informed consent by the subject documented prior to any study procedures

• Age = 18 years

• Have had clinical type 1 diabetes for at least one year

• Willing and able to avoid deodorant, scented lotions, and scented laundry detergent on your clothes on the day of the visit

Exclusion Criteria:

• Unable to provide informed consent (e.g. impaired cognition or judgment)

• Unable to safely comply with study procedures and reporting requirements (e.g. impaired memory or unable to speak and read English)

• Current participation in another diabetes-related clinical trial that, in the judgment of the principal investigator, will compromise the results of this study or the safety of the subject

• Pregnancy (positive urine HCG), breast feeding, plan to become pregnant in the immediate future, or sexually active without use of contraception

• Subjects must use acceptable contraception for the two weeks prior to the study, throughout the study and for the two weeks following the study.

• Acceptable contraception methods include:

• Oral contraceptive pill (OCP)

• Intrauterine Device (IUD, hormonal or copper)

• Male condoms

• Female condoms

• Diaphragm or cervical cap with spermicide

• Contraceptive patch (such as OrthoEvra)

• Contraceptive implant (such as Implanon, Nexplanon)

• Vaginal ring (such as NuvaRing)

• Progestin shot (such as Depo-Provera)

• Male partner with a vasectomy proven to be effective by semen analysis

• Abnormal EKG consistent with coronary artery disease or increased risk of malignant arrhythmia including, but not limited to, evidence of active ischemia, prior myocardial infarction, proximal LAD critical stenosis (Wellen's sign), prolonged QT interval (> 440 ms). Non-specific ST segment and T wave changes are not grounds for exclusion in the absence of symptoms or history of heart disease. A reassuring evaluation by a cardiologist after an abnormal EKG finding may allow participation.

• History of hypoglycemic seizures (grand mal) or coma in the last year

• History of poor venous access or inadequate venous access as determined by trial nurse or physician at time of screening

• Hemoglobin < 12 g/dl for men, < 11 g/dl for women

• Any factors that, in the opinion of the principal investigator would interfere with the safe completion of the study

Related Conditions & MeSH terms

• Diabetes Mellitus, Type 1
• Hypoglycemia
• Type 1 Diabetes Mellitus

Locations

Country	Name	City	State
United States	Massachusetts General Hospital (MGH) Diabetes Research Center	Boston	Massachusetts

Sponsors (2)

Lead Sponsor	Collaborator
Massachusetts General Hospital	Mitre Medical Corp.

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Identification of Volatile Organic Chemical Indicators of Hypoglycemia	Exploration via chemical analysis of clinical samples taken from diabetics' breath and sweat, using gas chromatograph-mass spectrometry (GC-MS) and liquid chromatograph-mass spectrometry (LC-MS), to determine the volatile organic compounds whose varying concentrations might correlate with diabetics' blood sugar concentrations in the normoglycemic and hypoglycemic ranges.	Up to 12 months