RESUMO
Doppler ultrasonography is used in the evaluation of hemodynamics, and the resistivity (RI) and pulsatility (PI) indexes provide information about resistance to blood flow within a vessel. This systematic review was carried out to evaluate renal RI and PI in clinically healthy and nonsedated cats and as well as their usefulness in the evaluation of kidney disease in cats. An electronic search in the PubMed, Scopus, and Web of Science databases was carried out using the terms "resistive index" or "resistivity index" or "pulsatility index;" "Doppler;" "renal" or "kidney;" and "cat" or "feline" in titles, abstracts, and keywords. Variables of interest related to experimental model features, research methods, and technical resources were extracted from the studies. The methodological quality was assessed with SYRCLE's risk of bias tool. Thus, 14 studies involving healthy and sick cats were selected. Interestingly, the upper limits estimated for both RI and PI varied among studies. The upper limits of renal RI for healthy cats varied between 0.64 and 0.72, while for PI, the values varied from 1.06 to 1.29. A limited number of studies evaluated cats with kidney disease. In most studies, RI values of kidneys with different conditions were significantly different from kidneys of healthy animals, indicating that RI values increase with kidney disease. The parameters body weight, heart rate, and age seem to influence the RI values. Standardized studies regarding its realization and description are still necessary to define normal values and analyze its applicability in the clinical diagnostic routine.
Assuntos
Doenças do Gato , Nefropatias , Animais , Doenças do Gato/diagnóstico por imagem , Gatos , Rim/diagnóstico por imagem , Nefropatias/veterinária , Artéria Renal/diagnóstico por imagem , Artéria Renal/fisiologia , Ultrassonografia DopplerRESUMO
Background: The urachus is a tubular structure continuous with the urinary bladder and the allantois in foetal mammals.It serves as a communication between these two structures. At birth, it loses its function and undergoes atrophy by fibrousproliferation within the lumen. When this atrophy process fails at some point, congenital anomalies of the urachus occur.These anomalies are rare in animals, and to our knowledge, the urachal cyst has not yet been described in dogs. The presentwork is unique in that it reports a case of this congenital defect in a dog. Our aim is to increase awareness and to discussthe clinical presentation, the imaging techniques used, and the final diagnosis of this anomaly.Case: A 3-year-old bitch Pit Bull was presented for veterinary assistance to investigate recurrent pseudopregnancy and anirregular estrous cycle. The animal presented in good bodily condition, and the white blood count and clinical biochemistrywere normal. At ultrasound, 2 tubular structures, filled by an echogenic fluid mimicking uterine topography, were foundextending through the umbilical and hypogastric regions. No alterations in structure, echogenicity or echotexture of theother organs were observed, including the ovaries and uterus. On exploratory laparotomy, a cystic structure was found,with 2 segments: the larger one was on the left side, attached to the apex of the bladder by its caudal portion; the otherwas on the right side, attached to the spleen by its cranial portion and to the apex of the bladder by its caudal portion inconnection with the left segment. The ovaries, uterus and uterine horns showed no macroscopic alterations. The structurewas removed, and after analysis (macroscopic morphology, wall histopathology and biochemistry of the contained fluid),it was...(AU)
Assuntos
Animais , Feminino , Cães , Cisto do Úraco/patologia , Cisto do Úraco/veterinária , Anormalidades Congênitas/veterinária , Laparotomia/veterinária , Ultrassonografia/veterináriaRESUMO
Background: The urachus is a tubular structure continuous with the urinary bladder and the allantois in foetal mammals.It serves as a communication between these two structures. At birth, it loses its function and undergoes atrophy by fibrousproliferation within the lumen. When this atrophy process fails at some point, congenital anomalies of the urachus occur.These anomalies are rare in animals, and to our knowledge, the urachal cyst has not yet been described in dogs. The presentwork is unique in that it reports a case of this congenital defect in a dog. Our aim is to increase awareness and to discussthe clinical presentation, the imaging techniques used, and the final diagnosis of this anomaly.Case: A 3-year-old bitch Pit Bull was presented for veterinary assistance to investigate recurrent pseudopregnancy and anirregular estrous cycle. The animal presented in good bodily condition, and the white blood count and clinical biochemistrywere normal. At ultrasound, 2 tubular structures, filled by an echogenic fluid mimicking uterine topography, were foundextending through the umbilical and hypogastric regions. No alterations in structure, echogenicity or echotexture of theother organs were observed, including the ovaries and uterus. On exploratory laparotomy, a cystic structure was found,with 2 segments: the larger one was on the left side, attached to the apex of the bladder by its caudal portion; the otherwas on the right side, attached to the spleen by its cranial portion and to the apex of the bladder by its caudal portion inconnection with the left segment. The ovaries, uterus and uterine horns showed no macroscopic alterations. The structurewas removed, and after analysis (macroscopic morphology, wall histopathology and biochemistry of the contained fluid),it was...