scholarly journals Effects of blood oxygen saturation on pulmonary artery remodeling in an in vitro perfusion circuit model

2021 ◽  
Vol 13 (4) ◽  
pp. 2169-2176
Author(s):  
Yao Liu ◽  
Bin Wen ◽  
Fengwen Zhang ◽  
Xiang-Bin Pan
Keyword(s):  
Pulmonary Artery ◽  
Oxygen Saturation ◽  
Circuit Model ◽  
Blood Oxygen ◽  
Blood Oxygen Saturation ◽  
In Vitro Perfusion ◽  
Artery Remodeling ◽  
Pulmonary Artery Remodeling

scholarly journals Optical Measurement of Blood Oxygen Saturation of Dental Pulp

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Satoko Kakino ◽  
Shinya Kushibiki ◽  
Azusa Yamada ◽  
Zenzo Miwa ◽  
Yuzo Takagi ◽  
...  
Keyword(s):  
Light Intensity ◽  
Oxygen Saturation ◽  
Dental Pulp ◽  
Optical Measurement ◽  
Blood Oxygen ◽  
Arterial Pulse ◽  
Blood Oxygen Saturation ◽  
Visible Wavelengths

The applicability of arterial pulse oximetry to dental pulp was demonstrated using in vitro and in vivo measurements. First, porcine blood of known oxygen saturation (SO2) was circulated through extracted human upper incisors, while transmitted-light plethysmography was performed using three different visible wavelengths. From the light intensity waveforms measured in vitro, a parameter that is statistically correlated to SO2 was calculated using the pulsatile/nonpulsatile component ratios of two wavelengths for different SO2. Then, values were measured in vivo for living incisors, and the corresponding SO2 values were calculated using the results of in vitro measurements. The estimated SO2 values of the upper central incisors measured in vivo were from 71.0 to 92.7%. This study showed the potential to measure the oxygen saturation changes to identify the sign of pulpal inflammation.

scholarly journals Stent implantation into ductus arteriosus: a new alternative of palliative treatment of duct-dependent pulmonary circulation

2016 ◽  
Vol 44 (1) ◽  
pp. 30
Author(s):  
Mulyadi M Djer ◽  
Bambang Madiyono ◽  
Sudigdo Sastroasmoro ◽  
Sukman T Putra ◽  
Ismet N Oesman ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Oxygen Saturation ◽  
Stent Implantation ◽  
Pulmonary Circulation ◽  
Ductus Arteriosus ◽  
Blood Oxygen ◽  
Blood Oxygen Saturation ◽  
Case Series Study

Background The technical aspects of ductal stenting have beenreported, but little is known about the fate of the duct after stentimplantation.Objectives To determine the effects of PDA stenting on the degreeof cyanosis, blood oxygen saturation, long-term patency of PDA,and the growth of pulmonary artery and its branches, in patientswith duct-dependent pulmonary circulation.Methods This was a case series study conducted at the Depart-ment of Pediatric Cardiology, Institut Jantung Negara (National HeartInstitute), Kuala Lumpur, Malaysia from November 1996 to Septem-ber 2001 on patients with duct-dependent pulmonary circulation whounderwent stent implantation. All patients were followed-up until oc-clusion or block occurred or until the end of follow-up time. The evalu-ation consisted of clinical manifestations, electrocardiography, chestx-ray, echocardiography, and cardiac catheterization.Results Stent was successfully implanted in 60 patients (84%),failed in 7 patients (10%) and contra indicated in 4 patients (6%).There was significant improvement on the degree of cyanosis afterstent implantation (p<0.0001). The blood oxygen saturation signifi-cantly increased from 74% (ranged 42-93; SD 12) before proce-dure, to 90% (ranged 62-100; SD 8) afterward (p<0.0001). The meanduration of follow-up time was 14.2 months (ranged 2.5-50.8; SD13) and the minimal patency of PDA was 11.2 months (ranged 1.1-47.7; SD 10.7) after implantation. At the end of follow-up, the stentswere widely patent in 33 patients (55%), stenotic in 15 patients (25%)and spontaneously occluded in 12 patients (20%). There was in-creased growth of pulmonary artery as measured by McGoon ratiofrom 1.23 (ranged 0.4-2.3; SD 0.4) to 1.81 (ranged 0.7-0.9; SD 0.57),and no distortion of pulmonary artery and its branches found.Conclusion Stent implantation into ductus arteriosus decreasedthe degree of cyanosis, increased blood oxygen saturation, main-tained long-term patency of ductus arteriosus, and promoted theincreased growth of pulmonary artery without distortion of pulmo-nary artery and its branches

scholarly journals Protective effect of sildenafil in pulmonary hypertensive child with congenital heart disease

2018 ◽  
Vol 4 (4) ◽  
Keyword(s):  
Pulmonary Hypertension ◽  
Pulmonary Artery ◽  
Oxygen Saturation ◽  
Pulmonary Artery Pressure ◽  
Primary Pulmonary Hypertension ◽  
Blood Oxygen ◽  
Blood Oxygen Saturation ◽  
Acceleration Time ◽  
Artery Pressure ◽  
Secondary Type

Objective Pulmonary hypertension has been described as an elevation in mean pulmonary artery pressure (PAP) >25 mmHg at rest or 30 mmHg during exercise, which can be classified into primary and secondary pulmonary hypertension.Methods In this study, subjects were divided into two groups of patients and controls. The patients were treated with Sildenafil for 3 months, starting with 0.2 mg/kg/dose, six times daily and then the dose was increased with an increment of 0.2 mg/kg/dose every 15 days. Echocardiography examination, including pulmonary artery pressure, tricuspid regurgitation velocity, and pulmonary artery acceleration time, as well as oxygen saturation (SpO2) rate were measured every 15 days.Results The results revealed that a significant decrease (P < 0.05) in the pulmonary artery and tricuspid pressure, and a significant increase (P < 0.05) in the rate of blood oxygen saturation and pulmonary artery acceleration time have been found.Conclusion The results of this study reveal that Sildenafil has a great effect in the treatment of the secondary type of pulmonary hypertension and has a negligible effect on primary pulmonary hypertension.

scholarly journals PSIX-9 Impacts of bunk management on feedlot performance, carcass characteristics, hydrogen sulfide concentration and blood oxygen saturation in steers fed 25 or 50% modified distillers grains plus solubles

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 422-422
Author(s):  
Rebecca L Moore ◽  
Cierrah J Kassetas ◽  
Leslie A LeKatz ◽  
Bryan W Neville
Keyword(s):  
Hydrogen Sulfide ◽  
Oxygen Saturation ◽  
Management Strategy ◽  
Distillers Grains ◽  
Feed Ratio ◽  
Sulfide Concentration ◽  
Blood Oxygen ◽  
Blood Oxygen Saturation ◽  
Feedlot Performance ◽  
Arterial Blood

Abstract One hundred and twenty-six yearling angus steers (initial body weight 445.87 ± 7.13 kg) were utilized in a 2 x 2 factorial design to evaluate the impacts of bunk management and modified distillers grains plus solubles (mDGS) inclusion on feedlot performance, hydrogen sulfide concentrations and blood oxygen saturation. Treatments included bunk management strategy either control bunk management (CON; clean bunks at the time of next day’s feeding) or long bunk management (LONG; feed remaining at time of next day’s feeding), and two inclusion rates of mDGS either 25% or 50% (DM Basis). On d 0, 7, 14, 21, 28 and 35 rumen gas samples were collected via rumenocentesis, and arterial blood samples were collected on two steers from each pen. No differences (P ≥ 0.09) were observed for dry matter intake, average daily gain and gain-to-feed ratio for bunk management or mDGS inclusion. Hot carcass weight, ribeye area, marbling score and quality grade were not affected (P ≥ 0.48) by either bunk management or mDGS inclusion. Back fat was greater (P = 0.04) for CON steers compared to LONG (1.30 vs 1.12 ± 0.05cm, respectively), but was not affected (P = 0.59) by mDGS inclusion. Steers on CON had greater (P = 0.03) yield grades compared to LONG (3.21 vs 2.96 ± 0.11, respectively). Bunk management strategy did not impact hydrogen sulfide concentrations or blood oxygen saturation (P = 0.82). Hydrogen sulfide concentrations increased (P &lt; 0.001) with increasing mDGS inclusion. Blood oxygen saturation was influenced by day of sampling (P = 0.01). Blood oxygen saturation was not affected (P = 0.07) by mDGS inclusion. The fact that ruminal hydrogen sulfide concentrations increased while blood oxygen saturation remained similar raises questions about the quantity of hydrogen sulfide and metabolic fate of excess hydrogen sulfide in the blood of ruminant animals.

scholarly journals The Role of JAK/STAT Molecular Pathway in Vascular Remodeling Associated with Pulmonary Hypertension

2021 ◽  
Vol 22 (9) ◽  
pp. 4980
Author(s):  
Inés Roger ◽  
Javier Milara ◽  
Paula Montero ◽  
Julio Cortijo
Keyword(s):  
Pulmonary Hypertension ◽  
Smooth Muscle ◽  
Pulmonary Artery ◽  
Vascular Remodeling ◽  
Pulmonary Arteries ◽  
Clinical Manifestations ◽  
Different Types ◽  
Artery Remodeling ◽  
Stat Pathway ◽  
Pulmonary Artery Remodeling

Pulmonary hypertension is defined as a group of diseases characterized by a progressive increase in pulmonary vascular resistance (PVR), which leads to right ventricular failure and premature death. There are multiple clinical manifestations that can be grouped into five different types. Pulmonary artery remodeling is a common feature in pulmonary hypertension (PH) characterized by endothelial dysfunction and smooth muscle pulmonary artery cell proliferation. The current treatments for PH are limited to vasodilatory agents that do not stop the progression of the disease. Therefore, there is a need for new agents that inhibit pulmonary artery remodeling targeting the main genetic, molecular, and cellular processes involved in PH. Chronic inflammation contributes to pulmonary artery remodeling and PH, among other vascular disorders, and many inflammatory mediators signal through the JAK/STAT pathway. Recent evidence indicates that the JAK/STAT pathway is overactivated in the pulmonary arteries of patients with PH of different types. In addition, different profibrotic cytokines such as IL-6, IL-13, and IL-11 and growth factors such as PDGF, VEGF, and TGFβ1 are activators of the JAK/STAT pathway and inducers of pulmonary remodeling, thus participating in the development of PH. The understanding of the participation and modulation of the JAK/STAT pathway in PH could be an attractive strategy for developing future treatments. There have been no studies to date focused on the JAK/STAT pathway and PH. In this review, we focus on the analysis of the expression and distribution of different JAK/STAT isoforms in the pulmonary arteries of patients with different types of PH. Furthermore, molecular canonical and noncanonical JAK/STAT pathway transactivation will be discussed in the context of vascular remodeling and PH. The consequences of JAK/STAT activation for endothelial cells and pulmonary artery smooth muscle cells’ proliferation, migration, senescence, and transformation into mesenchymal/myofibroblast cells will be described and discussed, together with different promising drugs targeting the JAK/STAT pathway in vitro and in vivo.

Sign in / Sign up

Export Citation Format

Share Document