Collection of Breath and Sweat to Identify Indicators of Hypoglycemia
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 18
- 试验地点
- 1
- 主要终点
- Identification of Volatile Organic Chemical Indicators of Hypoglycemia
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Only
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •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
排除标准
- •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
结局指标
主要结局
Identification of Volatile Organic Chemical Indicators of Hypoglycemia
时间窗: Up to 12 months
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.
次要结局
未报告次要终点
研究者
Steven J. Russell, MD, PhD
Principal Investigator
Massachusetts General Hospital