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Mechanical ventilators

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https://www.readbyqxmd.com/read/28822818/phrenic-long-term-facilitation-following-intrapleural-ctb-sap-induced-respiratory-motor-neuron-death
#1
Nicole L Nichols, Taylor A Craig, Miles A Tanner
Amyotrophic lateral sclerosis (ALS) is a devastating disease leading to progressive motor neuron degeneration and death by ventilatory failure. In a rat model of ALS (SOD1(G93A)), phrenic long-term facilitation (pLTF) following acute intermittent hypoxia (AIH) is enhanced greater than expected at disease end-stage but the mechanism is unknown. We suggest that one trigger for this enhancement is motor neuron death itself. Intrapleural injections of cholera toxin B fragment conjugated to saporin (CTB-SAP) selectively kill respiratory motor neurons and mimic motor neuron death observed in SOD1(G93A) rats...
August 16, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28822745/discordant-perceptions-of-prognosis-and-treatment-options-between-physicians-and-patients-with-advanced-heart-failure
#2
Amrut V Ambardekar, Jennifer T Thibodeau, Adam D DeVore, Michelle M Kittleson, Rhondalyn C Forde-McLean, Maryse Palardy, Maria M Mountis, Linda Cadaret, Jeffrey J Teuteberg, Salpy V Pamboukian, Rongbing Xie, Lynne W Stevenson, Garrick C Stewart
OBJECTIVES: This study assessed patient and physician perceptions of heart failure (HF) disease severity and treatment options. BACKGROUND: The prognosis for ambulatory patients with advanced HF on medical therapy is uncertain, yet has important implications for decision making regarding transplantation and left ventricular assist device (LVAD) placement. METHODS: Ambulatory patients with advanced HF (New York Heart Association functional class III to IV, Interagency Registry for Mechanically Assisted Circulatory Support profiles 4 to 7) on optimized medical therapy were enrolled across 11 centers...
August 3, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28822739/experimental-characterization-and-model-identification-of-the-nonlinear-compressible-material-behavior-of-lung-parenchyma
#3
Anna M Birzle, Christian Martin, Lena Yoshihara, Stefan Uhlig, Wolfgang A Wall
The mechanical properties of lung parenchyma are essential both in lung function and biology; consequently, experimental methods are developed to describe the mechanical behavior of lung parenchyma. During breathing and mechanical ventilation, volume change is the physiologically dominating deformation mode of lung parenchyma; nevertheless, most studies examine lung tissue in mainly isochoric tension tests. In this paper, a novel experimental method for the quantification of the compressible material behavior at high volume changes of viable lung parenchyma is proposed...
August 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28822399/chest-tube-removal-in-simple-pneumothorax-does-water-seal-duration-matter
#4
Lindsay C Bridges, Danny J Torrent, Catalina Mosquera, Michael R Bard
Timing of chest tube (CT) removal after transition from suction to water-seal (WS) varies when treating traumatic simple pneumothoraces (PTXs). Longer periods of WS may identify slow-occurring PTXs reducing CT replacement, whereas shorter periods may expedite patient disposition and have associated cost savings. Prior studies support the need for an interval of WS. We compare durations of WS, looking at rates of CT reinsertion. A 10-year retrospective review on trauma patients with a simple PTX requiring a CT was performed...
August 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28822398/variability-in-perioperative-fasting-practices-negatively-impacts-nutritional-support-of-critically-ill-intubated-patients
#5
Molly J Douglas, David Ciraulo
The aim of the study was to quantify nutritional losses related to pre- and postoperative fasts in critically ill intubated patients and to explore whether shorter fasts are safe and appropriate in this population. A retrospective review of mechanically ventilated adults undergoing surgery more than 24 hours after admission to a Level I trauma center over 15 months was done, which yielded 132 procedures and 81 unique patients. Ninety per cent of preoperative periods and 43 per cent of postoperative periods were affected by nonmedical barriers to feeding...
August 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28822325/are-there-regional-tendencies-toward-controversial-screening-practices-a-study-of-prostate-and-breast-cancer-screening-in-a-medicare-population
#6
Eric Raffin, Tracy Onega, Julie Bynum, Andrea Austin, Donald Carmichael, Kristen Bronner, Philip Goodney, Elias S Hyams
INTRODUCTION: Prostate and breast cancer screening in older patients continue to be controversial. Balancing the desire for early detection with avoidance of over-diagnosis has led to competing and contradictory guidelines for both practices. Despite similarities, it is not known how these screening practices are related at the regional level. In this study, we examined how screening PSA and mammography are related within healthcare regions, and, to better understand what may be driving these practices, whether they are associated with local intensity of care...
August 16, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28821360/development-and-implementation-of-an-early-mobility-program-for-mechanically-ventilated-pediatric-patients
#7
Kristina A Betters, Kiran B Hebbar, David Farthing, Brittany Griego, Tricia Easley, Hartley Turman, Lauren Perrino, Stephanie Sparacino, Mary L deAlmeida
PURPOSE: Early mobility (EM) is being used in adult ICUs in an effort to treat and prevent intensive care unit acquired weakness (ICU-AW) and Post-Intensive Care Syndrome (PICS). Data supports children suffer from ICU-AW and PICS as well. Our objective was to create and implement an EM protocol for pediatric patients receiving invasive mechanical ventilation. METHODS: A multidisciplinary EM committee was formed to create and implement an EM protocol in a quarternary care PICU...
August 9, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28820799/regional-anesthesia-and-analgesia-after-surgery-in-icu
#8
Mathieu Capdevila, Séverin Ramin, Xavier Capdevila
PURPOSE OF REVIEW: The aim is to demonstrate that ICU physicians should play a pivotal role in developing regional anesthesia techniques that are underused in critically ill patients despite the proven facts in perioperative and long-term pain, organ dysfunction, and postsurgery patient health-related quality of life improvement. RECENT FINDINGS: Regional anesthesia and/or analgesia strategies in ICU reduce the surgical and trauma-stress response in surgical patients as well as complications incidence...
August 17, 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/28820753/prevention-of-exposure-keratopathy-in-critically-ill-patients-a-single-center-randomized-pilot-trial-comparing-ocular-lubrication-with-bandage-contact-lenses-and-punctal-plugs
#9
Itai Bendavid, Inbal Avisar, Irena Serov Volach, Amir Sternfeld, Idit Dan Brazis, Lewaa Umar, Yiftach Yassur, Pierre Singer, Jonathan David Cohen
OBJECTIVES: To compare the effectiveness of bandage contact lenses and punctal plugs with ocular lubricants in preventing corneal damage in mechanically ventilated and sedated critically ill patients. DESIGN: Single-center, prospective, randomized, pilot study. SETTING: Sixteen-bed, general ICU at a tertiary academic medical center. PATIENTS: Adults admitted to the ICU and anticipated to require mechanical ventilation and continuous sedation for greater than or equal to 4 days...
August 17, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28820175/noninvasive-mechanical-ventilation-in-early-acute-respiratory-distress-syndrome
#10
Alice Grassi, Giuseppe Foti, John G Laffey, Giacomo Bellani
Non invasive ventilation (NIV) has a well established role in the treatment of acute-on-chronic respiratory failure and cardiogenic pulmonary oedema. Its role in acute hypoxaemic respiratory failure has been increasingly investigated, but its impact on the management and the outcome of the subset of patients affected by acute respiratory distress syndrome (ARDS) is still to be determined. ARDS could be a risk factor for NIV failure and in these patient delayed endotracheal intubation can lead to an increased mortality...
August 17, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28820040/effect-of-interhospital-icu-relocation-on-patient-physiology-and-clinical-outcomes
#11
David R Janz, Yasin A Khan, Jennifer L Mooney, Matthew W Semler, Todd W Rice, Jessica L Johnson, Bennett P deBoisblanc
Relocation of large numbers of critically ill patients between hospitals is sometimes necessary and the risks associated with relocation may be high. In the setting of adherence to an interhospital intensive care unit (ICU) relocation protocol, we aimed to determine whether the interhospital relocation of all ICU patients in a single day is associated with changes in vital signs, device removal, and worse clinical outcomes. We conducted a prospective, observational, cohort study of all critically ill adults admitted to a tertiary medical center's ICUs on the day of a planned hospital relocation and exposed to interhospital ICU relocation compared with unexposed critically ill adults...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28820027/atelectasis-after-airway-extubation-during-veno-arterial-extracorporeal-membrane-oxygenation-support
#12
Hong Wang, Ming Jia, Bin Mao, Xiaotong Hou
Veno-arterial extracorporeal membrane oxygenation (VA ECMO) is used in cardiopulmonary failure patients to provide temporary assisted circulation. Usually, prolonged intubation and invasive mechanical ventilation are required in patients with ECMO support. We report on two cases of patients who had no pre-existing injuries of the affected lung, underwent VA ECMO support after open-heart surgery and received airway extubation (AE) or awake ECMO with the recovery of left ventricular ejection fraction. Atelectasis happened after AE and non-invasive positive pressure ventilation attenuated the atelectasis of one patient...
September 2017: Perfusion
https://www.readbyqxmd.com/read/28819793/the-mechanisms-underlying-the-production-of-discontinuous-gas-exchange-cycles-in-insects
#13
REVIEW
Philip G D Matthews
This review examines the control of gas exchange in insects, specifically examining what mechanisms could explain the emergence of discontinuous gas exchange cycles (DGCs). DGCs are gas exchange patterns consisting of alternating breath-hold periods and bouts of gas exchange. While all insects are capable of displaying a continuous pattern of gas exchange, this episodic pattern is known to occur within only some groups of insects and then only sporadically or during certain phases of their life cycle. Investigations into DGCs have tended to emphasise the role of chemosensory thresholds in triggering spiracle opening as critical for producing these gas exchange patterns...
August 17, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28819399/outcomes-of-cancer-therapy-administered-to-treatment-na%C3%A3-ve-lung-cancer-patients-in-the-intensive-care-unit
#14
Yen-Fu Chen, Jou-Wei Lin, Chao-Chi Ho, Ching-Yao Yang, Chia-Hao Chang, Tao-Min Huang, Chung-Yu Chen, Kuan-Yu Chen, Jin-Yuan Shih, Chong-Jen Yu
Objectives: Therapy outcomes for newly diagnosed, critically ill lung cancer patients have seldom been evaluated. This study evaluated therapy outcomes for treatment-naïve lung cancer patients in the intensive care unit (ICU). Materials and Methods: Patients were excluded if they had previously received lung cancer treatment, such as systemic chemotherapy, targeted therapy, radiotherapy, or surgical lung resection before ICU admission. The therapeutic strategies for the treatment-naïve patients were determined while they were in the ICU...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28818610/surfactant-and-continuous-positive-airway-pressure-for-the-prevention-of-chronic-lung-disease-history-reality-and-new-challenges
#15
REVIEW
Hany Aly, Mohamed A Mohamed, Jen-Tien Wung
The discovery of surfactant was one of the most significant research events to occur in the history of neonatology. Certainly, surfactant saved lives for premature infants who were otherwise considered non-viable. However, the prevention of chronic lung disease did not progress and it became clear that a significant portion of the help surfactant provides to the premature lung is counteracted by mechanical ventilation. A dilemma exists over the priorities in premature management to intubate and administer surfactant or not to intubate and support these infants non-invasively with the use of continuous positive airway pressure...
August 14, 2017: Seminars in Fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28818484/the-physiology-of-submaximal-exercise-the-steady-state-concept
#16
REVIEW
Guido Ferretti, Nazzareno Fagoni, Anna Taboni, Paolo Bruseghini, Giovanni Vinetti
The steady state concept implies that the oxygen flow is invariant and equal at each level along the respiratory system. The same is the case with the carbon dioxide flow. This condition has several physiological consequences, which are analysed. First, we briefly discuss the mechanical efficiency of exercise and the energy cost of human locomotion, as well as the roles played by aerodynamic work and frictional work. Then we analyse the equations describing the oxygen flow in lungs and in blood, the effects of ventilation and of the ventilation - perfusion inequality, and the interaction between diffusion and perfusion in the lungs...
August 14, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28817481/incorporating-dynamic-assessment-of-fluid-responsiveness-into-goal-directed-therapy-a-systematic-review-and-meta-analysis
#17
Joseph M Bednarczyk, Jason A Fridfinnson, Anand Kumar, Laurie Blanchard, Rasheda Rabbani, Dean Bell, Duane Funk, Alexis F Turgeon, Ahmed M Abou-Setta, Ryan Zarychanski
OBJECTIVE: Dynamic tests of fluid responsiveness have been developed and investigated in clinical trials of goal-directed therapy. The impact of this approach on clinically relevant outcomes is unknown. We performed a systematic review and meta-analysis to evaluate whether fluid therapy guided by dynamic assessment of fluid responsiveness compared with standard care improves clinically relevant outcomes in adults admitted to the ICU. DATA SOURCES: Randomized controlled trials from MEDLINE, EMBASE, CENTRAL, clinicaltrials...
September 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28816920/similar-metabolic-innate-immunity-and-adipokine-profiles-in-adult-and-pediatric-sepsis-versus-systemic-inflammatory-response-syndrome-a-pilot-study
#18
Theonymfi Tavladaki, Anna Maria Spanaki, Helen Dimitriou, Efmorfia Kondili, Christianna Choulaki, Dimitris Georgopoulos, George Briassoulis
OBJECTIVES: To examine whether the septic profiles of heat shock protein 72, heat shock protein 90α, resistin, adiponectin, oxygen consumption, CO2 production, energy expenditure, and metabolic pattern, along with illness severity, nutritional, and inflammatory indices, differ between adult and pediatric patients compared with systemic inflammatory response syndrome and healthy controls. To evaluate whether these biomolecules may discriminate sepsis from systemic inflammatory response syndrome in adult and pediatric patients...
August 12, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28816919/enteral-nutrition-practices-in-critically-ill-children-requiring-noninvasive-positive-pressure-ventilation
#19
Matthew K Leroue, Ryan J Good, Heather E Skillman, Angela S Czaja
OBJECTIVES: Evaluate the practice of providing enteral nutrition in critically ill children requiring noninvasive positive pressure ventilation. DESIGN: Retrospective cohort study. SETTING: PICU within a quaternary care children's hospital. PATIENTS: PICU patients older than 30 days requiring noninvasive positive pressure ventilation for greater than or equal to 24 hours from August 2014 to June 2015. Invasive mechanical ventilation prior to noninvasive positive pressure ventilation and inability to receive enteral nutrition at baseline were additional exclusionary criteria...
August 12, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28816096/management-of-severe-pulmonary-hemorrhage-in-a-neonate-on-veno-arterial-ecmo-by-the-temporary-clamping-of-the-endotracheal-tube-a-case-report
#20
Vaclav Vobruba, Tomas Grus, Frantisek Mlejnsky, Jan Belohlavek, Jan Hridel, Lukas Lambert
Severe pulmonary hemorrhage in the newborn is an infrequent, but life-threatening, event. A newborn with persistent pulmonary hypertension and a large persistent ductus arteriosus and open foramen ovale presented with hypoxemia and progressive right heart failure shortly after birth, requiring veno-arterial extracorporeal membrane oxygenation (ECMO) support. Twenty minutes after the initiation of ECMO, the patient developed severe pulmonary hemorrhage refractory to conventional treatment. As a last resort, the endotracheal tube was clamped...
August 1, 2017: Perfusion
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