This paper considers the criterion of minimum compression work to derive an expression for the interstage pressure of a multistage compressor with intercooling that includes the gas properties, pressure drops in the intercoolers, different suction gas temperatures, and isentropic efficiencies in each compression stage. The analytical expression for the interstage pressures is applied to estimate the number of compression stages and to evaluate its applicability in order to estimate interstage pressures in the operation of multistage compressors, which can be especially useful when their measurements are not available.
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http://dx.doi.org/10.3390/e23030351 | DOI Listing |
J Clin Med
July 2024
Division of Pediatric Critical Care Medicine, Cardinal Glennon Children's Hospital, Saint Louis, MO 63104, USA.
Pediatr Cardiol
February 2024
Thomas P. Graham Jr. Division of Pediatric Cardiology, Department of Pediatrics, Vanderbilt University Medical Center, 2200 Children's Way, Suite 5230 DOT, Nashville, TN, 37205, USA.
Background: Turner syndrome (TS) is associated with left-sided cardiac lesions, including hypoplastic left heart syndrome (HLHS). Mortality as high as 80-90% has been reported following stage I single-ventricle palliation (S1P) in patients with TS and HLHS (TS + HLHS). The specific factors that relate to poor outcomes are not well understood.
View Article and Find Full Text PDFJ Aerosol Med Pulm Drug Deliv
February 2024
Applied Particle Principles, LLC, Hamilton, Virginia, USA.
Cascade impactors are essential for measuring the aerodynamic particle size distribution delivered by metered dose, dry powder, and similar inhalable drug products. For quality control of used impactors, periodic optical inspection of the nozzles of each impactor stage (stage mensuration) is currently the only method sufficiently precise to test whether used impactors are suitable for continued use, in accord with pharmacopeial standards. Here, we demonstrate a new method for quality control of used impactors.
View Article and Find Full Text PDFSemin Thorac Cardiovasc Surg
April 2024
Department of Cardiovascular Surgery, Boston Children's Hospital, 300 Longwood Avenue, Boston, MA, 02115. Electronic address:
Single-stage ventricular septation for double-inlet left or right ventricle (DILV or DIRV) has historically been associated with poor outcomes. We hypothesize that staged ventricular septation may demonstrate favorable clinical outcomes to be an alternative to Fontan palliation. This single-center retrospective study reviewed patients with DILV or DIRV who underwent staged ventricular septation between 2015-2021.
View Article and Find Full Text PDFCardiol Young
August 2023
Medical College of Wisconsin, Department of Pediatrics, Division of Pediatric Cardiology, Milwaukee, WI, USA.
Objectives: We investigated the efficacy and complication profile of intranasal dexmedetomidine for transthoracic echocardiography sedation in patients with single ventricle physiology and shunt-dependent pulmonary blood flow during the high-risk interstage period.
Methods: A single-centre, retrospective review identified interstage infants who received dexmedetomidine for echocardiography sedation. Baseline and procedural vitals were reported.
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