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The case of a 2-year-old common European feline was admitted to the emergency room due to weakness, inactivity, and total anorexia of several days of evolution according to on-call veterinarians. Using emergency pleuropulmonary ultrasonography Veterinary Point of care ultrasound, pleural effusion with suspended particles is observed. Thoracentesis was performed, obtaining a fluid with characteristics of empyema, thoracic drains were placed for evacuation and pleural lavages. Upon admission, the patient presented severe myocardial contractile dysfunction with global dilation of the heart. In addition, there were signs of stasis or spontaneous ultrasound contrast, which correlates with prothrombotic events. Bacteriological cure was achieved with pharmacological management and drainage with daily washings after one month of treatment. Improvement is observed in cardiac function (with serial ultrasound monitoring) and thromboprophylaxis without evidence of alterations generated by thrombotic phenomena. Six months after the event occurred, the patient leads a normal life without requiring any support therapy. [ABSTRACT FROM AUTHOR]

Although congenital tracheal anomalies are not very common in veterinary medicine, they are still very important. Just as happens in human medicine, most possible variants are of very striking clinical presentation, due to the respiratory distress produced in patients. All require some type of surgical or minimally invasive correction in order to overcome the acute condition. Below is the case of a 10-month-old male feline that attended the emergency ward with acute inspiratory and expiratory dyspnea, who particularly presented marked inspiratory stridor. As a result of the patient's decease and subsequent necropsy and histopathology it was concluded that he presented segmental congenital tracheal stenosis due to absence of tracheal rings. [ABSTRACT FROM AUTHOR]

The numerical solution of partial differential equations with finite differences mimetic methods that satisfy properties of the continuum differential operators and mimic discrete versions of appropriate integral identities is more likely to produce better approximations. Recently, one of the authors developed a systematic approach to obtain mimetic finite difference discretizations for divergence and gradient operators, which achieves the same order of accuracy on the boundary and inner grid points. This paper uses the second-order version of those operators to develop a new mimetic finite difference method for the steady-state diffusion equation. A complete theoretical and numerical analysis of this new method is presented, including an original and nonstandard proof of the quadratic convergence rate of this new method. The numerical results agree in all cases with our theoretical analysis, providing strong evidence that the new method is a better choice than the standard finite difference method.