کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5926462 1167361 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessment of upper airway dynamic properties using sternal phrenic nerve magnetic stimulation in awake subjects
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی فیزیولوژی
پیش نمایش صفحه اول مقاله
Assessment of upper airway dynamic properties using sternal phrenic nerve magnetic stimulation in awake subjects
چکیده انگلیسی

To assess upper airway (UA) dynamic properties, magnetic stimulation of the phrenic nerves (MSPN) is usually performed at cervical level or anterior-laterally at the neck base. We hypothesized that UA dynamic properties could be effectively assessed by MSPN performed at the sternal level. Instantaneous flow, pharyngeal and mask pressures were recorded in 12 healthy awake subjects. End-expiratory MSPN were applied in random order with a non-focal coil placed behind the 7th cervical vertebrae (C7-MS) and at the sternal level (a-MS). The percentage of flow-limited twitches was greater with a-MS (a-MS: 33% and C7-MS: 2%; P < 0.0001). For the non flow-limited twitches, maximal inspiratory flow was 36% greater (P < 0.001) and isoflow UA resistance was lower with a-MS (0.6 ± 0.1 and 0.9 ± 0.1 cm H2O l−1 s; P = 0.02). Maximal inspiratory flow of flow-limited twitches was 78% greater (P = 0.05) and isoflow UA resistance tended to be lesser with a-MS (0.9 ± 0.3 and 1.8 ± 0.7 cm H2O l−1 s; P = 0.09). a-MS could be a practical approach for assessing UA dynamic properties in awake subjects.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Respiratory Physiology & Neurobiology - Volume 178, Issue 2, 15 September 2011, Pages 218-222
نویسندگان
, , , ,