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Alveolar-arterial oxygen gradient

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https://www.readbyqxmd.com/read/29764373/a-subclinical-high-tricuspid-regurgitation-pressure-gradient-independent-of-the-mean-pulmonary-artery-pressure-is-a-risk-factor-for-the-survival-after-living-donor-liver-transplantation
#1
Yosuke Saragai, Akinobu Takaki, Yuzo Umeda, Takashi Matsusaki, Tetsuya Yasunaka, Atsushi Oyama, Ryuji Kaku, Kazufumi Nakamura, Ryuichi Yoshida, Daisuke Nobuoka, Takashi Kuise, Kosei Takagi, Takuya Adachi, Nozomu Wada, Yasuto Takeuchi, Kazuko Koike, Fusao Ikeda, Hideki Onishi, Hidenori Shiraha, Shinichiro Nakamura, Hiroshi Morimatsu, Hiroshi Ito, Toshiyoshi Fujiwara, Takahito Yagi, Hiroyuki Okada
BACKGROUND: Portopulmonary hypertension (POPH) is characterized by pulmonary vasoconstriction, while hepatopulmonary syndrome (HPS) is characterized by vasodilation. Definite POPH is a risk factor for the survival after orthotopic liver transplantation (OLT), as the congestive pressure affects the grafted liver, while subclinical pulmonary hypertension (PH) has been acknowledged as a non-risk factor for deceased donor OLT. Given that PH measurement requires cardiac catheterization, the tricuspid regurgitation pressure gradient (TRPG) measured by echocardiography is used to screen for PH and congestive pressure to the liver...
May 15, 2018: BMC Gastroenterology
https://www.readbyqxmd.com/read/29707971/human-multilineage-differentiating-stress-enduring-cells-exert-pleiotropic-effects-to-ameliorate-acute-lung-ischemia-reperfusion-injury-in-a-rat-model
#2
Hiroshi Yabuki, Shohei Wakao, Yoshihiro Kushida, Mari Dezawa, Yoshinori Okada
Posttransplantation lung ischemia-reperfusion (IR) injuries affect both patient survival and graft function. In this study, we evaluated the protective effects of infused human multilineage-differentiating stress-enduring (Muse) cells, a novel, easily harvested type of nontumorigenic endogenous reparative stem cell, against acute IR lung injury in a rat model. After a 2-h warm IR injury induction in a left rat lung, human Muse cells, human mesenchymal stem cells (MSCs), and vehicle were injected via the left pulmonary artery after reperfusion...
January 1, 2018: Cell Transplantation
https://www.readbyqxmd.com/read/29684443/modified-porcine-surfactant-enriched-by-recombinant-human-superoxide-dismutase-for-experimental-meconium-aspiration-syndrome
#3
Jana Kopincova, Pavol Mikolka, Maros Kolomaznik, Petra Kosutova, Andrea Calkovska, Daniela Mokra
AIMS: Combination of exogenous surfactant with antioxidant enzyme recombinant human superoxide dismutase (rhSOD) was tested in the treatment of experimental meconium aspiration syndrome as oxidative processes play key role in its pathogenesis. MATERIAL AND METHODS: Young New Zealand rabbits were instilled by saline (Sal group) or by meconium suspension (Mec group). Some of meconium-instilled animals were treated by surfactant alone (Surf group) or surfactant in combination with rhSOD (Surf + SOD group) and oxygen-ventilated for 5 h...
April 20, 2018: Life Sciences
https://www.readbyqxmd.com/read/29675687/clinical-characteristics-in-lymphangioleiomyomatosis-related-pulmonary-hypertension-an-observation-on-50-patients
#4
Xiuxiu Wu, Wenshuai Xu, Jun Wang, Xinlun Tian, Zhuang Tian, Kaifeng Xu
Lymphangioleiomyomatosis (LAM) is a rare diffuse cystic lung disease. Knowledge on LAM-related pulmonary hypertension (PH) is limited. This study aimed to analyze the clinical characteristics of LAM with elevated pulmonary artery pressure (PAP) and evaluate the potential efficacy of sirolimus. The study involved 50 LAM patients who underwent echocardiography. According to the tricuspid regurgitation velocity (TRV), these patients were divided into the TRV ≤ 2.8 m/s group and TRV > 2.8 m/s group. Both groups comprised 25 females with an average age of 38...
April 19, 2018: Frontiers of Medicine
https://www.readbyqxmd.com/read/29629058/effect-of-propofol-and-isoflurane-on-gas-exchange-parameters-following-one-lung-ventilation-in-thoracic-surgery-a-double-blinded-randomized-controlled-clinical-trial
#5
Shima Sheybani, Alireza Sharifian Attar, Sogol Golshan, Shadi Sheibani, Majid Rajabian
Background: The use of anesthetic drugs with minimal inhibitory effects on the hypoxic pulmonary vasoconstriction (HPV) could have a decisive role in preventing the hypoxemia during one-lung ventilation (OLV). Objective: The aim of this study was to compare the effects of propofol and isoflurane on the changes in gas exchange parameters following OLV in thoracic surgery. Methods: This double-blinded randomized controlled clinical trial was conducted on patients who were candidates for elective right thoracotomy referred to the central operating room of Ghaem Hospital in Mashhad, Iran, during February 2016-2017...
February 2018: Electronic Physician
https://www.readbyqxmd.com/read/29609450/hepatopulmonary-syndrome-caused-by-hypothalamic-obesity-and-nonalcoholic-fatty-liver-disease-after-surgery-for-craniopharyngioma-a-case-report
#6
Dai Jung, Go Hun Seo, Yoon-Myung Kim, Jin-Ho Choi, Han-Wook Yoo
Hypothalamic obesity is often complicated in patients with craniopharyngioma due to hypothalamic damage by the tumor itself, treatment modalities, and associated multiple pituitary hormone deficiency. Hypothalamic obesity causes secondary diseases such as nonalcoholic fatty liver disease (NAFLD) and diabetes mellitus (DM). We report a 19-year-old female who was diagnosed with craniopharyngioma, developed hypothalamic obesity after tumor resection, and progressed to hepatopulmonary syndrome. She manifested NAFLD 1 year after tumor resection...
March 2018: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29605198/gas-exchange-and-breathing-pattern-in-women-with-postmenopausal-bone-fragility
#7
F Polverino, J P de Torres, C Santoriello, A Capuozzo, I Mauro, Joselyn Rojas-Quintero, B D'Agostino, M Pistolesi, B Celli, M Polverino, C A Owen
BACKGROUND: Little is known about the relationship between bone fragility and respiratory function. We hypothesized that women with osteoporosis or osteopenia, without cardio-pulmonary disease, have perturbations in the pattern of breathing and gas exchange. METHODS: In 44 women with bone fragility (BF, T score: < -1), and 20 anthropomorphically-matched control women (T score > -1) we compared pulmonary function tests, central respiratory drive (mouth occlusion pressure or P 0...
April 2018: Respiratory Medicine
https://www.readbyqxmd.com/read/29599604/review-article-update-on-current-and-emergent-data-on-hepatopulmonary-syndrome
#8
REVIEW
Stergios Soulaidopoulos, Evangelos Cholongitas, George Giannakoulas, Maria Vlachou, Ioannis Goulis
Hepatopulmonary syndrome (HPS) is a frequent pulmonary complication of end-stage liver disease, characterized by impaired arterial oxygenation induced by intrapulmonary vascular dilatation. Its prevalence ranges from 4% to 47% in patients with cirrhosis due to the different diagnostic criteria applied among different studies. Nitric oxide overproduction and angiogenesis seem to be the hallmarks of a complicated pathogenetic mechanism, leading to intrapulmonary shunting and ventilation-perfusion mismatch. A classification of HPS according to the severity of hypoxemia has been suggested...
March 28, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29573542/pulmonary-transit-time-derived-from-pulmonary-angiography-for-the-diagnosis-of-hepatopulmonary-syndrome
#9
He Zhao, Jiaywei Tsauo, Xiaowu Zhang, Huaiyuan Ma, Ningna Weng, Luhua Wang, Xiao Li
BACKGROUND & AIMS: Pulmonary transit time (PTT) is the transit time of blood from the right side of the heart to the left side of the heart. The aim of the present study was to evaluate the role of the PTT derived from pulmonary angiography in the diagnosis of hepatopulmonary syndrome (HPS). METHODS: From December 2014 to September 2015, all patients with chronic liver disease and/or portal hypertension undergoing a venous interventional radiologic procedure at our institution were eligible for inclusion in this prospective study...
March 24, 2018: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/29478509/50-years-ago-in-the-journal-of-pediatrics-alveolar-arterial-oxygen-gradient-in-premature-infants-breathing-100-oxygen
#10
Ola Didrik Saugstad
No abstract text is available yet for this article.
March 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29452100/a-new-noninvasive-method-of-measuring-impaired-pulmonary-gas-exchange-in-lung-disease-an-outpatient-study
#11
John B West, Daniel R Crouch, Janelle M Fine, Dipen Makadia, Daniel L Wang, G Kim Prisk
BACKGROUND: It would be valuable to have a noninvasive method of measuring impaired pulmonary gas exchange in patients with lung disease and thus reduce the need for repeated arterial punctures. This study reports the results of using a new test in a group of outpatients attending a pulmonary clinic. METHODS: Inspired and expired partial pressure of oxygen (PO2 ) and Pco2 are continually measured by small, rapidly responding analyzers. The arterial PO2 is calculated from the oximeter blood oxygen saturation level and the oxygen dissociation curve...
February 13, 2018: Chest
https://www.readbyqxmd.com/read/29449947/reversible-platypnoea-orthodeoxia-syndrome-in-post-tuberculosis-bronchial-stenosis
#12
Geak Poh Tan, John Arputhan Abisheganaden, Soon Keng Goh, Akash Verma
Bronchial stenosis is known to complicate endobronchial tuberculosis despite medical therapy. It is often associated with dyspnoea. In severe cases, bronchial stenosis results in airflow obstruction, impaired secretion clearance, and can lead to respiratory failure. We present an unusual observation of platypnoea-orthodeoxia syndrome in a young woman with acute atelectasis due to post-tuberculosis bronchial stricture. Imaging revealed complete middle and right lower lobe atelectasis with a partially aerated right upper lobe...
April 2018: Respirology Case Reports
https://www.readbyqxmd.com/read/29260572/hypoxia-as-an-independent-predictor-of-adverse-outcomes-in-pulmonary-embolism
#13
Muthiah Subramanian, Srinivasan Ramadurai, Preetam Arthur, Sowmya Gopalan
Background The purpose of this study was to investigate the correlation between the computed tomography pulmonary artery obstruction index and parameters of functional lung impairment in acute pulmonary embolism, and establish the value of these parameters in prognosticating right ventricular dysfunction and 30-day mortality. Methods This study included 322 consecutive patients (mean age 45.6 ± 13.2 years, 46.9% male) with acute pulmonary embolism, free of other cardiopulmonary disease, who underwent computed tomography pulmonary angiography...
January 2018: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/29245324/clinical-efficacy-of-transjugular-intrahepatic-portosystemic-shunt-in-the-treatment-of-hepatopulmonary-syndrome
#14
Hongwei Zhao, Fuquan Liu, Zhendong Yue, Lei Wang, Zhenhua Fan, Fuliang He
Transjugular intrahepatic portosystemic shunt (TIPS) reduces the portal venous pressure of patients with hepatopulmonary syndrome (HPS).To describe the patients who underwent TIPS for the treatment of HPS.A retrospective study was performed on 81 patients with HPS and gastrointestinal hemorrhage treated with TIPS. Thirty patients underwent TIPS through the main portal vein (group A), 24 through the left branch of the portal vein (group B), and 27 through the right branch of the portal vein (group C). The partial pressure of arterial oxygen (PaO2), alveolar-to-arterial oxygen partial pressure gradient (A-aPO2), oxygen saturation (SO2), and complications were recorded and compared...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29242121/postinduction-butorphanol-administration-alters-oxygen-consumption-to-improve-blood-gases-in-etorphine-immobilized-white-rhinoceros
#15
Peter Buss, Michele Miller, Andrea Fuller, Anna Haw, Eliza Stout, Francisco Olea-Popelka, Leith Meyer
OBJECTIVE: To investigate the effects of postinduction butorphanol administration in etorphine-immobilized white rhinoceros on respiration and blood gases. STUDY DESIGN: Randomized crossover study. ANIMALS: A group of six sub-adult male white rhinoceros. METHODS: Etorphine, or etorphine followed by butorphanol 12 minutes after recumbency, was administered intramuscularly [2.5 mg etorphine, 25 mg butorphanol (1000-1250 kg), or 3...
January 2018: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29229259/effects-of-positive-airway-pressure-and-mechanical-ventilation-of-the-lungs-during-cardiopulmonary-bypass-on-pulmonary-adverse-events-after-cardiac-surgery-a-systematic-review-and-meta-analysis
#16
Yi-Chia Wang, Chi-Hsiang Huang, Yu-Kang Tu
OBJECTIVE: To investigate whether different ventilation strategies during cardiopulmonary bypass (CPB) can improve outcomes in adult cardiac surgery patients. DESIGN: Systematic review of randomized controlled trials with meta-analyses. SETTING: Clinical trials for human studies up to July 2016 were obtained from electronic databases (Medline, Embase, PubMed, and the Cochrane Central Register of Controlled Trials) and reference lists of relevant randomized trials and review articles...
April 2018: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/29192374/impact-of-bacterial-translocation-on-hepatopulmonary-syndrome-a-prospective-observational-study
#17
Ki Tae Suk, Moon Young Kim, Soung Won Jeong, Jae Young Jang, Yoon Ok Jang, Soon Koo Baik
BACKGROUND/AIMS: Hepatopulmonary syndrome (HPS) is characterized by a defect in oxygenation induced by pulmonary vascular dilatation in cirrhosis. While severe HPS is responsible for a high rate of mortality, the prevalence and pathophysiology of HPS are not fully elucidated. We evaluated the prevalence and pathophysiology of HPS in patients with cirrhosis. METHODS: A total of 142 patients with cirrhosis who underwent saline-agitated contrast echocardiography were enrolled in this prospective observational study...
January 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29131002/low-tidal-volume-positive-end-expiratory-pressure-versus-high-tidal-volume-zero-positive-end-expiratory-pressure-and-postoperative-pulmonary-functions-in-robot-assisted-laparoscopic-radical-prostatectomy
#18
Murat Haliloglu, Beliz Bilgili, Mehtap Ozdemir, Tumay Umuroglu, Nurten Bakan
OBJECTIVE: The aim was to compare the effects of low tidal volume (VT) and moderate positive end-expiratory pressure (PEEP) with high VT and zero end-expiratory pressure (ZEEP) on postoperative pulmonary functions and oxygenation in patients undergoing robot-assisted laparoscopic radical prostatectomy. SUBJECTS AND METHODS: Forty-four patients were randomized into low VT-PEEP and high VT-ZEEP groups. The patients were ventilated with a VT of 6 mL/kg and 8 cm H2O PEEP in the low VT-PEEP group and a VT of 10 mL/kg and 0 cm H2O PEEP in the high VT-ZEEP group...
2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/29125632/median-sternotomy-versus-intercostal-thoracotomy-for-lung-lobectomy-a-comparison-of-short-term-outcome-in-134-dogs
#19
Seth Bleakley, Kevin Phipps, Brian Petrovsky, Eric Monnet
OBJECTIVE: To compare short-term outcomes between dogs undergoing lung lobectomy via median sternotomy (MS) or intercostal thoracotomy (ICT). STUDY DESIGN: Retrospective case control study. METHODS: Medical records of dogs that underwent lung lobectomy via MS or ICT at a single institution were reviewed for demographics, intraoperative findings, and postoperative management and outcomes. Dogs with pleural effusion, pneumonia, migrating foreign body, lung abscess, spontaneous pneumothorax, or lung lobe torsion were excluded...
January 2018: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/29118307/prevention-of-pulmonary-edema-after-minimally-invasive-cardiac-surgery-with-mini-thoracotomy-using-neutrophil-elastase-inhibitor
#20
Satoshi Yamashiro, Ryoko Arakaki, Yuya Kise, Yukio Kuniyoshi
PURPOSE: Unilateral re-expansion pulmonary edema (RPE) is a rare but one of the most critical complications that may occur after re-expansion of a collapsed lung after minimally invasive cardiac surgery (MICS) with mini-thoracotomy. METHODS: We performed a total of 40 consecutive patients with MICS by right mini-thoracotomy with single-lung ventilation between January 2013 and June 2016. We divided the patients into control group (n = 13) and neutrophil elastase inhibitor group (n = 27)...
February 20, 2018: Annals of Thoracic and Cardiovascular Surgery
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