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5 results on '"Novellas, Rosa"'

1. CT characterisation of feline adrenal glands.

Author

Mallol C, Altuzarra R, Espada Y, Tobón Restrepo M, Serrano E, and Novellas R

Subjects
Animals, Body Weight physiology, Female, Male, Reference Values, Retrospective Studies, Adrenal Glands anatomy & histology, Adrenal Glands diagnostic imaging, Cats anatomy & histology, Cats physiology, Tomography, X-Ray Computed veterinary
Abstract

Objectives: The objectives of this study were to describe the CT characteristics of the adrenal glands in healthy cats, to provide normal reference biometry for adrenal gland size and attenuation values, and to investigate the association with age, sex, laterality and body weight., Methods: Retrospective evaluation of 30 CT studies of healthy adult cats recruited from September 2013 to July 2015 was performed. Healthy cats >1 year of age were included based on the absence of clinical signs, unremarkable physical examination, normal results of the complete blood count, biochemical profile, feline immunodeficiency virus, feline leukaemia virus and Bartonella species infection tests. The relationship between gland biometry (size and attenuation values) and the age, sex, laterality and body weight of cats were tested by two-way ANOVA. The intraclass correlation coefficient was assessed and mean, SD, range and reference interval provided., Results: Twenty-seven cats were included. Bilobed, arrowhead and oval adrenal gland shape patterns were recognised, the first being most common. No statistically significant differences were observed between the biometric parameters (length, height and attenuation values) and age, sex, laterality or body weight of the cats. Regarding the width of the adrenal glands, there was a statistically significant effect of sex and laterality. T he length (11.6 ± 2.1 mm) and height (6.1 ± 1.3 mm) were the most consistent biometrical parameters to describe adrenal glands., Conclusions and Relevance: Adrenal gland shape, size and attenuation CT data of healthy feline patients are provided in this study, as well as normal reference intervals for morphometric characterisation based on adrenal length and height.

Published
2020
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2. Doppler ultrasonographic estimation of renal and ocular resistive and pulsatility indices in normal dogs and cats.

Author

Novellas R, Espada Y, and Ruiz de Gopegui R

Subjects
Animals, Eye diagnostic imaging, Kidney diagnostic imaging, Pulsatile Flow, Reference Values, Regional Blood Flow, Renal Artery physiology, Ultrasonography, Doppler, Arteries physiology, Cats physiology, Dogs physiology, Eye blood supply, Kidney blood supply
Abstract

Resistive index (RI) and pulsatility index (PI) are indirect measurements of blood flow resistance that may be used to evaluate vascular changes in renal and ophthalmologic diseases. To our knowledge, no reports are available describing values for renal and ocular PI index in the unsedated dog and ocular RI and PI indices in the unsedated cat. The purpose of this study was to measure normal values for both intrarenal and ocular RI and PI within the same subject in unsedated clinically normal dogs and cats. Twenty-seven dogs and 10 cats were considered healthy by means of physical examination, CBC, biochemical profile, urinalysis, and ultrasonography. Systolic blood pressure was measured by Doppler ultrasonography. Intrarenal and ocular arteries were scanned by pulsed Doppler ultrasonography to calculate RI and PI. No significant differences were noted between the values obtained for the right vs. the left kidney and eye. The upper values of these indices were calculated as mean + 2 standard deviations resulting in 0.72 and 1.52 for dog renal RI and PI; 0.7 and 1.29 for cat renal RI and PI; 0.76 and 1.68 for dog ocular RI and PI; and 0.72 and 1.02 for cat ocular RI and PI.

Published
2007
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3. Anatomic, computed tomographic, and ultrasonographic assessment of the lymph nodes in presumed healthy adult cats: the abdomen, pelvis, and hindlimb

Author

Tobon Restrepo, Mauricio, Novellas, Rosa, Aguilar, Adrià, Moll, Xavier, Espada, Yvonne, Diagnostische beeldvorming, CS_Welfare & emerging diseases, Diagnostische beeldvorming, and CS_Welfare & emerging diseases

Subjects
General Veterinary, General Medicine, veterinary(all), Hindlimb, Pelvis, Imaging, Feline, Abdomen, Cats, Animals, Abdominal, Prospective Studies, Tomography, X-Ray Computed, Computed tomography, Lymph nodes
Abstract

Background The computed tomography (CT) and ultrasonography (US) features of lymph nodes of the abdomen, pelvis, and hindlimb in healthy cats are poorly described in the current literature. A prospective anatomic and reference interval study was therefore performed. The lymph nodes of six feline cadavers were identified, and dimensions were measured (length, width, and height). The lymph nodes from 30 healthy adult cats were identified and measured using CT (pre- and postcontrast) and US. The identification and dimensions of the separate lymph nodes were compared between imaging techniques and the anatomic study. Results The identification of lymph nodes was most frequent in CT, and the dimensions were overall larger than those identified and measured in US and the anatomic study. The caudal epigastric and sacral lymph nodes were not identified in the anatomic study. The ischiatic, lumbar aortic, internal iliac, and caudal epigastric lymph nodes were not visualized in US. The height presented the main statistical differences among techniques. The lymph nodes were mainly homogeneous in pre- and postcontrast CT and US images. Some lymph nodes showed a hyperattenuating periphery with a hypoattenuating center (on pre- and postcontrast images) and a hypo-/isoechoic periphery with a hyperechoic center, representing the hilar fat. The lymph nodes were commonly elongated and rounded except for the jejunal lymph nodes, which had an irregular shape. Conclusions The assessment of most of the abdominal, pelvic, and hindlimb lymph nodes in the cat is feasible using CT and US, with CT performing best. Factors like the amount of adipose tissue and contrast administration subjectively improved the lymph node visualization and assessment. The measurements and features reported are proposed as reference values.

Published
2022

4. Anatomic, computed tomographic, and ultrasonographic assessment of the lymph nodes in presumed healthy adult cats: The head, neck, thorax, and forelimb

Author

Restrepo, Mauricio Tobón, Espada, Yvonne, Aguilar, Adrià, Moll, Xavier, Novellas, Rosa, Diagnostische beeldvorming, dCSCA AVR, CS_Welfare & emerging diseases, Diagnostische beeldvorming, dCSCA AVR, and CS_Welfare & emerging diseases

Subjects
Male, 0301 basic medicine, Histology, diagnostic imaging, Evolution, Tracheobronchial lymph nodes, Gross examination, 03 medical and health sciences, 0302 clinical medicine, Retropharyngeal lymph nodes, Behavior and Systematics, Forelimb, medicine, Animals, feline, Lymph node, Molecular Biology, Ecology, Evolution, Behavior and Systematics, Ultrasonography, Cancer staging, Ecology, business.industry, ultrasound, computed tomography, Anatomy, Cell Biology, Thorax, lymph node, gross anatomy, 030104 developmental biology, medicine.anatomical_structure, Deep cervical lymph nodes, Cats, Gross anatomy, Female, Lymph Nodes, Lymph, Tomography, X-Ray Computed, business, Head, Neck, 030217 neurology & neurosurgery, Developmental Biology
Abstract

Assessment of the lymph nodes is key in staging cancer patients. Descriptions of normal features of the feline lymph nodes using computed tomography (CT) and ultrasound (US) are limited. A prospective anatomic and comparative imaging study was performed. The frequency of identification and the size of the lymph nodes during gross pathology from 6 feline cadavers were compared to the images of lymph nodes from 30 presumed healthy adult cats obtained by CT and US. Measurements (length, width, and height) were compared among techniques. The CT and US features of the identified lymph nodes were also recorded. The frequency of identification of the lymph centers varied among techniques and individually. The mandibular lymph nodes were identified in 100% of the cadavers and in 100% of the healthy cats using CT and US. The medial retropharyngeal lymph nodes were identified in 100% of the cats using CT and US. The deep cervical lymph nodes were not visualized in the cadavers. The cranial mediastinal and tracheobronchial lymph nodes were not visualized using US. Lymph nodes showed a higher length on CT and higher width on US. The height was the most statistically significant variable measurement among techniques. On CT, lymph nodes were most frequently isoattenuating or slightly hypoattenuating to surrounding musculature, with homogeneous contrast enhancement. On US, most lymph nodes were isoechoic or hypoechoic to surrounding fat tissue. The lymph nodes were most frequently elongated or rounded.

Published
2021

5. CT characterisation of the feline os penis

Author

Restrepo, Mauricio Tobón, Altuzarra, Raúl, Espada, Yvonne, Domínguez, Elisabet, Mallol, Claudia, Novellas, Rosa, Diagnostische beeldvorming, dCSCA AVR, CS_Welfare & emerging diseases, Diagnostische beeldvorming, dCSCA AVR, and CS_Welfare & emerging diseases

Subjects
Male, medicine.medical_specialty, 040301 veterinary sciences, diagnostic imaging, Computed tomography, Bone and Bones, 0403 veterinary science, 03 medical and health sciences, Reference Values, Medical imaging, medicine, Animals, Small Animals, Retrospective Studies, 030304 developmental biology, 0303 health sciences, medicine.diagnostic_test, Genitourinary system, business.industry, genitalia, computed tomography, 04 agricultural and veterinary sciences, baculum, Baculum, Cats, Radiology, Tomography, X-Ray Computed, business, Penis, CT
Abstract

Objectives The aim of this study was to investigate the frequency of identification and to describe the CT features of the os penis in cats without genitourinary disorders. Methods CT studies from cats that underwent an abdominal or pelvic examination between October 2013 and May 2019 were reviewed retrospectively. Cats with no signs of urinary disease and with the external genitalia included in the scan were recruited. Length, width, height and pre- and post-contrast attenuation values of the os penis in soft tissue and bone algorithms were measured independently by two observers. Results Twenty-three cats met the inclusion criteria. A cylindrical bone-attenuating structure inside the glans penis compatible with the os penis was visible in 20/23 (87%) cats. Mean length, width and height values were 3.48 mm × 1.41 mm × 1.37 mm in the soft tissue algorithm, and 3.26 mm × 1.15 mm × 1.06 mm in bone algorithm. The size of the os penis was not significantly different in neutered vs intact cats, but it was significantly larger in soft tissue vs bone algorithm. Age and body weight did not influence os penis size. Pre-contrast mean ± SD attenuation was 216.7 ± 69.5 Hounsfield units (HU) for soft tissue and 320.1 ± 135.9 HU for bone algorithms. Post-contrast attenuation was 289.1 ± 68.8 HU for soft tissue and 383.4 ± 130.9 HU for bone algorithms. A significant correlation between the attenuation in bone algorithm with body weight was noted, where the os penis was less attenuating with increased body weight (pre-contrast: r = –0.479; P = 0.038). Conclusions and relevance The feline os penis is commonly seen on CT images, being more frequently detected than on radiographs. Its presence should not be mistaken for uroliths in the penile urethra.

Published
2020

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