تأثير تدفق الدم في اليد على مورفولوجيا موجات تخطيط التحجم لأطراف الأصابع وسرعة موجة النبض
The Effect of Hand Blood Flow on the Peripheral Fingertip Plethysmographic Waveforms Morphology and Pulse Wave Velocity
- الباحث
- شيماء أحمد عبدالله
- المشرف
- بسام الكيلاني - سمر عمران عيسى
- الجامعة
- الجامعة المستنصرية
- الكلية / القسم
- الطب / الفيزياء الطبية
- الشهادة
- ماجستير
- السنة
- 2022
- لغة الرسالة
- انكليزي
- الكلمات المفتاحية
- Photoplethysmography;Pulse wave velocity;Hand blood flow;Waveform morphology
Abstract
Monitoring blood perfusion and vascular assessment (arterial disease, arterial compliance and aging, endothelial function) are of vital importance for cardiovascular health. As a result, a variety of strategies have been created over the years. Photoplethysmography (PPG) is a type of optical method. for monitoring changes in blood volume in vascular tissue. It is well recognized for its use in oximetry (pulse oximetry) to estimate arterial blood oxygen saturation. In the lab, hand-elevation and hand-lowering procedures were used to alter peripheral blood flow in order to gain a better knowledge of the elements that affect the shape of peripheral digital pulse wave (DPW) data. The DPW signals of 15 healthy volunteers were recorded. during a hand-elevation and hand-lowering techniques in which the right hand was raised and lowered relative to heart level, while the left hand remained static. DPW signals were obtained from the right middle fingertip using a piezoelectric finger pulse transducer connected to power Lab data Acquisition Unit 26T. DPW features were identified using a feature- detection algorithm. The pulse width, time to peak (TTP), the rising time (TRise), the time to maximum slope (TTMas), the time to the minimum slope (TTMiS), the time to peak/width ratio (TTP/W ratio) were calculated from 30sec DPW signals at three different positions on the right hand in regard to the heart level.i.e. 35 cm above heart level (+35 cm), at the level of the heart (0 cm), and 35 cm below the level of the heart (-35 cm). DPW characteristics were found to vary with hand position. On lowering the hand to -35 cm relative to heart level, DPW width from the middle finger increased by 6 %, while lowering the arm decreased the
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