کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
875744 910799 2015 6 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
A dual mode breath sampler for the collection of the end-tidal and dead space fractions
ترجمه فارسی عنوان
نمونه ای از نفس دوگانه برای جمع آوری فواره های نهایی و فرسوده
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کلمات کلیدی
نمونه گیری نفس، تحلیل نفس، پایان جزر و مد، فضای مرده
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
چکیده انگلیسی


• A dual mode breath sampler for dead space and end-tidal fractions.
• Automatic sampling over single and multiple breaths.
• The breath sampler has low pressure drop, small dead volumes and can be portable.
• Efficient and correct sampling of volatile organic compounds.
• Compliance with the standard ISO 9241 on the ergonomics of human–computer interaction.

This work presents a breath sampler prototype automatically collecting end-tidal (single and multiple breaths) or dead space air fractions (multiple breaths). This result is achieved by real time measurements of the CO2 partial pressure and airflow during the expiratory and inspiratory phases. Suitable algorithms, used to control a solenoid valve, guarantee that a Nalophan® bag is filled with the selected breath fraction even if the subject under test hyperventilates. The breath sampler has low pressure drop (<0.5 kPa) and uses inert or disposable components to avoid bacteriological risk for the patients and contamination of the breath samples. A fully customisable software interface allows a real time control of the hardware and software status. The performances of the breath sampler were evaluated by comparing (a) the CO2 partial pressure calculated during the sampling with the CO2 pressure measured off-line within the Nalophan® bag; (b) the concentrations of four selected volatile organic compounds in dead space, end-tidal and mixed breath fractions.Results showed negligible deviations between calculated and off-line CO2 pressure values and the distributions of the selected compounds into dead space, end-tidal and mixed breath fractions were in agreement with their chemical–physical properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Medical Engineering & Physics - Volume 37, Issue 6, June 2015, Pages 539–544
نویسندگان
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