keyword
MENU ▼
Read by QxMD icon Read
search

Transpulmonary

keyword
https://www.readbyqxmd.com/read/28798197/corp-measurement-of-lung-function-in-small-animals
#1
Jason H T Bates
The measurement of lung function in mice and rats is crucial for understanding how well small animal models of pulmonary disease recapitulate human clinical pathology, but brings with it the challenge of making accurate measurements in animals as small as a mouse. Overcoming these challenges can be achieved in a number of ways, each based on a model idealization of how the lung works as a mechanical system. Accordingly, it is important to understand the theoretical basis on which an assessment of lung function rests in order to interpret experimental measurements appropriately...
August 10, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28775071/the-acute-effects-of-long-acting-bronchodilators-on-small-airways-detected-in-copd-patients-by-single-breath-n2-test-and-lung-p-v-curve
#2
Matteo M Pecchiari, Pierachille Santus, Dejan Radovanovic, Edgardo Giacomo D'Angelo
Small airways represent the key factor of chronic obstructive pulmonary disease (COPD) pathophysiology. The effect of different classes of bronchodilators on small airways is still poorly understood and difficult to assess. Hence, the acute effects of tiotropium (18 µg) and indacaterol (150 µg) on closing volume (CV) and ventilation inhomogeneity were investigated and compared in 51 stable patients (mean age (SD): 70±7 years; 82% males) with moderate to very severe COPD. Patients underwent body-plethysmography, arterial blood gas-analysis, tidal expiratory flow limitation (EFL), dyspnea assessment, and simultaneous recording of single breath nitrogen test (SBN) and transpulmonary pressure-volume curve (PL-V), before and one hour after drug administration...
August 3, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28762333/risk-factors-for-hemoptysis-complicating-17-18-gauge-ct-guided-transthoracic-needle-core-biopsy-multivariate-analysis-of-249-procedures
#3
Guillaume Chassagnon, Jules Gregory, Marc Al Ahmar, Pierre Magdeleinat, Paul Legmann, Joel Coste, Marie Pierre Revel
PURPOSE: We aimed to identify modifiable and nonmodifiable risk factors for hemoptysis complicating computed tomography (CT)-guided transthoracic needle biopsy. METHODS: All procedures performed in our institution from November 2013 to May 2015 were reviewed. Hemoptysis was classified as mild if limited to hemoptoic sputum and abundant otherwise. Presence of intra-alveolar hemorrhage on postbiopsy CT images was also evaluated. Patient- and lesion-related variables were considered nonmodifiable, while procedure-related variables were considered modifiable...
August 1, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28742775/estimation-of-stroke-volume-and-stroke-volume-changes-by-electrical-impedance-tomography
#4
Fernando José da Silva Ramos, André Hovnanian, Rogério Souza, Luciano C P Azevedo, Marcelo B P Amato, Eduardo L V Costa
BACKGROUND: Electrical impedance tomography (EIT) is a noninvasive imaging method that identifies changes in air and blood volume based on thoracic impedance changes. Recently, there has been growing interest in EIT to measure stroke volume (SV). The objectives of this study are as follows: (1) to evaluate the ability of systolic impedance variations (ΔZsys) to track changes in SV in relation to a baseline condition; (2) to assess the relationship of ΔZsys and SV in experimental subjects; and (3) to identify the influence of body dimensions on the relationship between ΔZsys and SV...
July 24, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28708679/transpulmonary-pressure-describes-lung-morphology-during-decremental-positive-end-expiratory-pressure-trials-in-obesity
#5
Jacopo Fumagalli, Lorenzo Berra, Changsheng Zhang, Massimiliano Pirrone, Roberta R De Santis Santiago, Susimeire Gomes, Federico Magni, Glaucia A B Dos Santos, Desmond Bennett, Vinicius Torsani, Daniel Fisher, Caio Morais, Marcelo B P Amato, Robert M Kacmarek
OBJECTIVES: Atelectasis develops in critically ill obese patients when undergoing mechanical ventilation due to increased pleural pressure. The current study aimed to determine the relationship between transpulmonary pressure, lung mechanics, and lung morphology and to quantify the benefits of a decremental positive end-expiratory pressure trial preceded by a recruitment maneuver. DESIGN: Prospective, crossover, nonrandomized interventional study. SETTING: Medical and Surgical Intensive Care Units at Massachusetts General Hospital (Boston, MA) and University Animal Research Laboratory (São Paulo, Brazil)...
August 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28707173/intraoperative-ventilation-of-morbidly-obese-patients-guided-by-transpulmonary-pressure
#6
Lars Eichler, Katarzyna Truskowska, A Dupree, P Busch, Alwin E Goetz, Christian Zöllner
BACKGROUND: Bariatric surgery has proven a successful approach in the treatment of morbid obesity and its concomitant diseases such as diabetes mellitus and arterial hypertension. Aiming for optimal management of this challenging patient cohort, tailored concepts directly guided by individual patient physiology may outperform standardized care. Implying esophageal pressure measurement and electrical impedance tomography-increasingly applied monitoring approaches to individually adjust mechanical ventilation in challenging circumstances like acute respiratory distress syndrome (ARDS) and intraabdominal hypertension-we compared our institutions standard ventilator regimen with an individually adjusted positive end expiratory pressure (PEEP) level aiming for a positive transpulmonary pressure (P L) throughout the respiratory cycle...
July 14, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28701178/the-future-of-mechanical-ventilation-lessons-from-the-present-and-the-past
#7
REVIEW
Luciano Gattinoni, John J Marini, Francesca Collino, Giorgia Maiolo, Francesca Rapetti, Tommaso Tonetti, Francesco Vasques, Michael Quintel
The adverse effects of mechanical ventilation in acute respiratory distress syndrome (ARDS) arise from two main causes: unphysiological increases of transpulmonary pressure and unphysiological increases/decreases of pleural pressure during positive or negative pressure ventilation. The transpulmonary pressure-related side effects primarily account for ventilator-induced lung injury (VILI) while the pleural pressure-related side effects primarily account for hemodynamic alterations. The changes of transpulmonary pressure and pleural pressure resulting from a given applied driving pressure depend on the relative elastances of the lung and chest wall...
July 12, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28690287/stroke-volume-variation-svv-and-pulse-pressure-variation-ppv-as-indicators-of-fluid-responsiveness-in-sevoflurane-anesthetized-mechanically-ventilated-euvolemic-dogs
#8
Yusuke Endo, Jun Tamura, Tomohito Ishizuka, Takaharu Itami, Kiwamu Hanazono, Kenjiro Miyoshi, Tadashi Sano, Kazuto Yamashita, William W Muir
Changes in stroke volume variation (SVV) and pulse pressure variation (PPV) in response to fluid infusion were experimentally evaluated during vecuronium infusion and sevoflurane anesthesia in 5 adult, mechanically ventilated, euvolemic, beagle dogs. Sequential increases in central venous pressure (CVP; 3-7[baseline], 8-12, 13-17, 18-22 and 23-27 mmHg) were produced by infusing lactated Ringer's solution and 6% hydroxyethyl starch solution. Heart rate (beats/min), right atrial pressure (RAP, mmHg), pulmonary arterial pressure (PAP, mmHg), pulmonary capillary wedge pressure (PCWP, mmHg), transpulmonary thermodilution cardiac output (TPTDCO, L/min), stroke volume (SV, ml/beat), arterial blood pressure (ABP, mmHg), extravascular lung water (EVLW, ml), pulmonary vascular permeability index (PVPI, calculated), SVV (%), PPV (%) and systemic vascular resistance (SVR, dynes/sec/cm(5)) were determined at each predetermined CVP range...
July 10, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28679201/physiological-effects-of-the-open-lung-approach-during-laparoscopic-cholecystectomy-focus-on-driving-pressure
#9
Davide D'Antini, Michela Rauseo, Salvatore Grasso, Lucia Mirabella, Luigi Camporota, Antonella Cotoia, Savino Spadaro, Alberto Fersini, Rocco Petta, Rosaria Menga, Alberto Sciusco, Michele Dambrosio, Gilda Cinnella
BACKGROUND: During laparoscopy, respiratory mechanics and gas exchange are impaired because of pneumoperitoneum and atelectasis formation. We applied an open lung approach (OLA) consisting in lung recruitment followed by a decremental positive-end expiratory pressure (PEEP) trial to identify the level of PEEP corresponding to the highest compliance of the respiratory system (best PEEP). Our hypothesis was that this approach would improve both lung mechanics and oxygenation without hemodynamic impairment...
July 5, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28645107/effects-of-liraglutide-on-hemodynamic-parameters-in-patients-with-heart-failure
#10
Jin Ying Zhang, Xin Yun Wang, Xiang Wang
Glucagon-like peptide-1 analogues improve left ventricular function in patients with acute myocardial infarction. This study aimed to evaluate the effects of liraglutide on hemodynamic parameters in patients with heart failure. A total of 78 patients with heart failure were enrolled in this study between August 2014 and November 2015. Of these, 52 patients were randomized 1:1 to receive either liraglutide or placebo for 7 days. Hemodynamic measurements were made using transpulmonary thermodilution and arterial pulse contour analysis...
June 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/28643321/global-end-diastolic-volume-could-be-more-appropiate-to-reduce-intraoperative-bleeding-than-central-venous-pressure-during-major-liver-transection
#11
Francisco Javier Redondo, Dawid Padilla, Ruben Villazala, Pedro Villaeiro, Victor Baladron, Natalia Bejerano
BACKGROUND: Central venous pressure often fails to identify the true value of cardiac preload. Our purpose is to investigate whether Global End-Diastolic Volume (GEDV) values can control hemodynamic parameters for the measurement of fluid volume, cardiac preload and blood loss during liver transection. METHODS: This was a prospective clinical study that included patients undergoing liver resection. All patients were monitored by means of PiCCO technology and 222 hemodynamic measurements were performed in 74 patients...
2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28633352/aortopulmonary-window-results-of-repair-beyond-infancy%C3%A2
#12
Sachin Talwar, Bharat Siddharth, Saurabh Kumar Gupta, Shiv Kumar Choudhary, Shyam Sunder Kothari, Rajnish Juneja, Anita Saxena, Balram Airan
OBJECTIVES: To study the anatomic and haemodynamic data and results of surgery in patients undergoing surgical repair of aortopulmonary window beyond infancy. METHODS: Between July 2005 and December 2015, 23 patients, older than 1 year undergoing surgery for aortopulmonary window were analysed retrospectively. Postoperative clinical and echocardiography follow-up were performed. RESULTS: Median age and weight at repair was 4 years (range 14 months-12 years) and 12 kg (range 3...
June 13, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28631764/-hemodynamic-effects-of-positive-end-expiratory-pressure
#13
Marco Marini, Giorgio Caretta, Fabio Vagnarelli, Fabiana Lucà, Emilia Biscottini, Alberto Lavorgna, Vincenza Procaccini, Letizia Riva, Gabriele Vianello, Nadia Aspromonte, Andrea Mortara, Renata De Maria, Piera Capasso, Serafina Valente, Michele Massimo Gulizia
The application of a positive end-expiratory pressure (PEEP), the cornerstone of noninvasive ventilation (NIV), causes hemodynamic changes in the cardiovascular system. To understand the benefits of NIV it is necessary to resume concepts of cardiovascular physiology and pathophysiology about cardiac function determinants, venous return, ventricular interdependence and heart-lung interaction, and to understand how PEEP interacts with them. The hemodynamic effects of PEEP are mediated by the increase in transpulmonary pressure, which results in increased pulmonary vascular resistance and in an attending small reduction of venous return in conditions of euvolemia, in a substantial reduction of left ventricular afterload and a potential positive effect on left ventricular stroke volume...
June 2017: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/28625165/transpulmonary-thermodilution-advantages-and-limits
#14
REVIEW
Xavier Monnet, Jean-Louis Teboul
BACKGROUND: For complex patients in the intensive care unit or in the operating room, many questions regarding their haemodynamic management cannot be answered with simple clinical examination. In particular, arterial pressure allows only a rough estimation of cardiac output. Transpulmonary thermodilution is a technique that provides a full haemodynamic assessment through cardiac output and other indices. MAIN BODY: Through the analysis of the thermodilution curve recorded at the tip of an arterial catheter after the injection of a cold bolus in the venous circulation, transpulmonary thermodilution intermittently measures cardiac output...
June 19, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28613203/-renal-tumors-percutaneous-ablation-by-microwave-initial-experience
#15
Juan Sebastian Toro-Gutierrez, Juan Jose Espejo-Herrero, Maria Sagrario Lombardo-Galera, Maria Eugenia Pérez-Montilla, Miguel Canis-López, Luis Zurera-Tendero, Juan Manuel Rubio
OBJECTIVE: To analyze retrospectively the safety and effectiveness of percutaneous microwave ablation of solid renal tumors, and also review different approach techniques. METHODS: It is a retrospective study approved by the ethics committee of both hospitals. 14 tumors with a mean size of 37 mm (12-50 mm) were treated in a single session, under general anesthesia and with CT guidance, in 14 patients (9 men) with a mean age of 66 years, using the ablation system AMICA by different approaches (trans pulmonary, trans peritoneal and retroperitoneal)...
June 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28592081/-comparison-of-transthoracic-or-percutaneous-balloon-pulmonary-valvuloplasty-in-the-therapy-of-pulmonary-valve-stenosis
#16
Y Q Xie, J Yan, Z D Hua, W B Ouyang, K J Pang, Y B Zhang, G J Zhang, S J Li
Objective: To compare the clinical outcome of patients with pulmonary valve stenosis underwent transthoracic and percutaneous balloon pulmonary valvuloplasty. Methods: Clinical data of 806 patients diagnosed as pulmonary valve stenosis underwent transthoracic(171 patients as group A)or percutaneous balloon pulmonary valvuloplasty (635 patients as Group B) in Fuwai Hospital from February 2006 to January 2016 were analyzed retrospectively. There were 72 males in group A (42.1%) and 344 males in group B (54.2%)...
June 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28584436/titration-of-ideal-positive-end-expiratory-pressure-in-acute-respiratory-distress-syndrome-comparison-between-lower-inflection-point-and-esophageal-pressure-method-using-volumetric-capnography
#17
Nandakishore Baikunje, Inderpaul Singh Sehgal, Sahajal Dhooria, Kuruswamy Thurai Prasad, Ritesh Agarwal
The tenets of mechanical ventilation in acute respiratory distress syndrome (ARDS) include the utilization of low tidal volume and optimal application of positive end-expiratory pressure (PEEP). Optimal PEEP in ARDS is characterized by reduction in alveolar dead space along with improvement in the lung compliance and resultant betterment in oxygenation. There are various methods of setting PEEP in ARDS. Herein, we report a patient of ARDS, wherein we employed measurement of dead space using volumetric capnography to compare two different PEEP strategies, namely, the lower inflection point and transpulmonary pressure monitoring...
May 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28580728/late-graft-failure-in-heart-transplant-recipients-incidence-risk-factors-and-clinical-outcomes
#18
Ángela López-Sainz, Eduardo Barge-Caballero, Gonzalo Barge-Caballero, David Couto-Mallón, María J Paniagua-Martin, Leticia Seoane-Quiroga, Carmen Iglesias-Gil, José M Herrera-Noreña, José J Cuenca-Castillo, José M Vázquez-Rodríguez, María G Crespo-Leiro
AIM: To analyse the incidence, risk factors and clinical outcomes of late graft failure after heart transplantation. METHODS AND RESULTS: We conducted an observational, single-centre study based on 547 patients who underwent cardiac transplantation from 1991 to 2014 and who survived the in-hospital postoperative period. Late graft failure was defined as the first hospitalization due to this condition after discharge. Over a mean follow-up of 8.4 ± 6, 178 (32...
June 5, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28557569/the-global-end-diastolic-volume-gedv-could-be-more-appropiate-to-fluid-management-than-central-venous-pressure-cvp-during-closed-hyperthermic-intrabdominal-chemotherapy-with-co2-circulation
#19
Francisco Javier Redondo, David Padilla, Pedro Villarejo, Victor Baladron, Patricia Faba, Sergio Sánchez, José Ramón Muñoz-Rodríguez, Natalia Bejarano
BACKGROUND: Closed hyperthermic intraperitoneal chemotherapy (HIPEC) may increase abdominal pressure and effects of hemodynamic changes due to maintenance hyperthermia. Our aim was to analyze the safety and effectiveness of our closed technique with CO2 circulation in management fluid status and hemodynamic parameters by means of cardiac preload control measured by Global End Diastolic Values (GEDV) and a gas exchanger. MATERIAL AND METHODS: A Pilot Clinical Study that included 18 advanced ovarian cancer patients undergoing citoreductive surgery and HIPEC...
May 30, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28545875/regional-volume-characteristics-of-the-preterm-infant-receiving-first-intention-continuous-positive-airway-pressure
#20
Risha Bhatia, Peter G Davis, David G Tingay
OBJECTIVE: To determine whether applying nasal continuous positive airway pressure (CPAP) using systematic changes in continuous distending pressure (CDP) results in a quasi-static pressure-volume relationship in very preterm infants receiving first intention CPAP in the first 12-18 hours of life. STUDY DESIGN: Twenty infants at <32 weeks' gestation with mild respiratory distress syndrome (RDS) managed exclusively with nasal CPAP had CDP increased from 5 to 8 to 10 cmH2O, and then decreased to 8 cmH2O and returned to baseline CDP...
August 2017: Journal of Pediatrics
keyword
keyword
10656
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"