P1.6 CAROTID-RADIAL PULSE TRANSIT TIME COMPARED TO THE PULSE ARRIVAL TIME TO THE CAPILLARY BED OF THE FINGER TIP DURING AND AFTER AEROBIC EXERCISE IN YOUNG HEALTHY SUBJECTS

2014 ◽  
Vol 8 (4) ◽  
pp. 130
Author(s):  
N. Potocnik ◽  
H. Lenasi
Keyword(s):  
Aerobic Exercise ◽  
Transit Time ◽  
Healthy Subjects ◽  
Arrival Time ◽  
Pulse Transit Time ◽  
Radial Pulse ◽  
Pulse Arrival Time ◽  
Capillary Bed ◽  
Finger Tip ◽  
Pulse Arrival

scholarly journals Difference in Pulse Arrival Time at Forehead and at Finger as a Surrogate of Pulse Transit Time

2016 ◽  
Author(s):  
Jesus Lazaro ◽  
Raquel Bailon ◽  
Pablo Laguna ◽  
Vaidotas Mazoras ◽  
Andrius Rapalis ◽  
...  
Keyword(s):  
Transit Time ◽  
Arrival Time ◽  
Pulse Transit Time ◽  
Pulse Arrival Time ◽  
Pulse Arrival

scholarly journals Author Correction: Weighing Scale-Based Pulse Transit Time is a Superior Marker of Blood Pressure than Conventional Pulse Arrival Time

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Stephanie L.-O. Martin ◽  
Andrew M. Carek ◽  
Chang-Sei Kim ◽  
Hazar Ashouri ◽  
Omer T. Inan ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Transit Time ◽  
Arrival Time ◽  
Pulse Transit Time ◽  
Pulse Arrival Time ◽  
Pulse Arrival

scholarly journals Weighing Scale-Based Pulse Transit Time is a Superior Marker of Blood Pressure than Conventional Pulse Arrival Time

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Stephanie L.-O. Martin ◽  
Andrew M. Carek ◽  
Chang-Sei Kim ◽  
Hazar Ashouri ◽  
Omer T. Inan ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Time Delay ◽  
Correlation Coefficient ◽  
Transit Time ◽  
Arrival Time ◽  
Mean Squared Error ◽  
Pulse Transit Time ◽  
Pulse Arrival Time ◽  
Squared Error ◽  
Pulse Arrival

Abstract Pulse transit time (PTT) is being widely pursued for cuff-less blood pressure (BP) monitoring. Most efforts have employed the time delay between ECG and finger photoplethysmography (PPG) waveforms as a convenient surrogate of PTT. However, these conventional pulse arrival time (PAT) measurements include the pre-ejection period (PEP) and the time delay through small, muscular arteries and may thus be an unreliable marker of BP. We assessed a bathroom weighing scale-like system for convenient measurement of ballistocardiography and foot PPG waveforms – and thus PTT through larger, more elastic arteries – in terms of its ability to improve tracking of BP in individual subjects. We measured “scale PTT”, conventional PAT, and cuff BP in humans during interventions that increased BP but changed PEP and smooth muscle contraction differently. Scale PTT tracked the diastolic BP changes well, with correlation coefficient of −0.80 ± 0.02 (mean ± SE) and root-mean-squared-error of 7.6 ± 0.5 mmHg after a best-case calibration. Conventional PAT was significantly inferior in tracking these changes, with correlation coefficient of −0.60 ± 0.04 and root-mean-squared-error of 14.6 ± 1.5 mmHg (p < 0.05). Scale PTT also tracked the systolic BP changes better than conventional PAT but not to an acceptable level. With further development, scale PTT may permit reliable, convenient measurement of BP.

Pulse arrival time is not an adequate surrogate for pulse transit time as a marker of blood pressure

2011 ◽  
Vol 111 (6) ◽  
pp. 1681-1686 ◽  
Author(s):  
Guanqun Zhang ◽  
Mingwu Gao ◽  
Da Xu ◽  
N. Bari Olivier ◽  
Ramakrishna Mukkamala
Keyword(s):  
Blood Pressure ◽  
Transit Time ◽  
Time Delays ◽  
Arrival Time ◽  
Mean Squared Error ◽  
Pulse Transit Time ◽  
Pulse Arrival Time ◽  
Squared Error ◽  
Evaluation Metric ◽  
Pulse Arrival

Pulse transit time (PTT) is a proven, simple to measure, marker of blood pressure (BP) that could potentially permit continuous, noninvasive, and cuff-less BP monitoring (after an initial calibration). However, pulse arrival time (PAT), which is equal to the sum of PTT and the pre-ejection period, is gaining popularity for BP tracking, because it is even simpler to measure. The aim of this study was to evaluate the hypothesis that PAT is an adequate surrogate for PTT as a marker of BP. PAT and PTT were estimated through the aorta using high-fidelity invasive arterial waveforms obtained from six dogs during wide BP changes induced by multiple interventions. These time delays and their reciprocals were evaluated in terms of their ability to predict diastolic, mean, and systolic BP (DBP, MBP, and SBP) per animal. The root mean squared error (RMSE) between the BP parameter predicted via the time delay and the measured BP parameter was specifically used as the evaluation metric. Taking the reciprocals of the time delays tended to reduce the RMSE values. The DBP, MBP, and SBP RMSE values for 1/PAT were 9.8 ± 5.2, 10.4 ± 5.6, and 11.9 ± 6.1 mmHg, whereas the corresponding values for 1/PTT were 5.3 ± 1.2, 4.8 ± 1.0, and 7.5 ± 2.2 mmHg ( P < 0.05). Thus tracking BP via PAT was not only markedly worse than via PTT but also unable to meet the FDA BP error limits. In contrast to previous studies, our results quantitatively indicate that PAT is not an adequate surrogate for PTT in terms of detecting challenging BP changes.

scholarly journals Arterial Parameters in Type-2 Diabetes and Healthy Subjects by using Impedance Plethysmography: A Case-control Study

2021 ◽  
Author(s):  
Yogesh Kishorbhai Kacha ◽  
Chetankumar Bhalabhai Desai ◽  
Hemant B Mehta ◽  
Chinmay J Shah
Keyword(s):  
Healthy Subjects ◽  
Arrival Time ◽  
Case Control Study ◽  
Impedance Plethysmography ◽  
Pulse Arrival Time ◽  
Males And Females ◽  
Pulse Arrival ◽  
Type 2 Diabetic ◽  
Control Study

Introduction: A reduced blood supply to lower limb, due to arterial disease, is a common cause of foot ulceration in patients with Diabetes Mellitus (DM). Impedance Plethysmography (IPG) is based on the measurement of changes in the electrical resistance (impedance) caused by blood volume changes. Aim: To compare parameters of type-2 diabetic subjects with those of healthy subjects along with different age group and to associate with Blood Flow Index (BFI), Fasting Blood Sugar (FBS), Post-Prandial Blood Sugar (PP2BS) and Body Mass Index (BMI). Materials and Methods: This case-control study was conducted at Government Medical College and in UHTC, Bhavnagar, Gujarat, India, from May 2012 to August 2013 on 100 healthy subjects and 100 type-2 diabetic subjects. IPG arterial parameters like BFI, Pulse Arrival Time (PAT), Pulse Termination Time (PTT), Differential Pulse Arrival Time (DPAT), Z0 (Basal impedance) recorded. The data were analysed by unpaired t-test and ANOVA test. Results: This study had 200 subjects of age more than 30 years. The diabetic subjects included 56 males and 44 females whereas the healthy subjects included 67 males and 33 females. There was bilateral significant reduction of BFI, PAT at knee, ankle and calf segment among diabetics group in males and females; and a bilateral significant reduction of PTT at ankle segment among diabetic males and females. DPAT value increased at knee, calf and ankle segment on both sides in male and female; except right ankle segment in diabetic group in females as compared to healthy subjects. Z0 increased at knee, ankle and calf segment in diabetic group on both side in males and females. BFI decreased with an increase in the duration of diabetes. The effect of FBS, PP2BS and BMI in diabetic subjects suggested a negative association with BFI. Conclusion: There was decrease in BFI, PAT, PTT and increase in DPAT in the knee, calf and ankle region of diabetic subjects. BFI negatively correlated with FBS, PP2BS and BMI among diabetics and decreased with increased duration of DM

Sign in / Sign up

Export Citation Format

Share Document