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1.
Sensors (Basel) ; 21(4)2021 Feb 11.
Artigo em Inglês | MEDLINE | ID: mdl-33670225

RESUMO

The regular monitoring of erythema, one of the most important skin lesions in atopic (allergic) dogs, is essential for successful anti-allergic therapy. The smartphone-based dermatoscopy enables a convenient way to acquire quality images of erythematous skin. However, the image sampling to evaluate erythema severity is still done manually, introducing result variability. In this study, we investigated the correlation between the most popular erythema indices (EIs) and dermatologists' erythema perception, and we measured intra- and inter-rater variability of the currently-used manual image-sampling methods (ISMs). We showed that the EIBRG, based on all three RGB (red, green, and blue) channels, performed the best with an average Spearman coefficient of 0.75 and a typical absolute disagreement of less than 14% with the erythema assessed by clinicians. On the other hand, two image-sampling methods, based on either selecting specific pixels or small skin areas, performed similarly well. They achieved high intra- and inter-rater reliability with the intraclass correlation coefficient (ICC) and Krippendorff's alpha well above 0.90. These results indicated that smartphone-based dermatoscopy could be a convenient and precise way to evaluate skin erythema severity. However, better outlined, or even automated ISMs, are likely to improve the intra- and inter-rater reliability in severe erythematous cases.


Assuntos
Doenças do Cão/diagnóstico por imagem , Eritema/veterinária , Interpretação de Imagem Assistida por Computador , Pele/diagnóstico por imagem , Animais , Cães , Eritema/diagnóstico por imagem , Reprodutibilidade dos Testes , Índice de Gravidade de Doença , Manejo de Espécimes
2.
J Small Anim Pract ; 62(4): 293-299, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33432617

RESUMO

OBJECTIVES: To describe the CT characteristics of uterine and vaginal mesenchymal tumours in dogs and to discuss imaging findings of the tumour types encountered. MATERIALS AND METHODS: Retrospective study on female dogs with confirmed histological diagnosis of uterine and vaginal mesenchymal tumours and available CT images. RESULTS: 120 records obtained through a medical record search were manually evaluated for eligibility, and 11 dogs presenting masses associated with the genital tract were identified. Of these 11 dogs, 7 dogs met the inclusion criteria and were included in the study. A clear degree of overlap was present between measurements of maximal diameter of benign and malignant tumours; however, malignant neoplasms tended to occupy a larger portion of the pelvic canal. Objective measurements of length suggest that malignant tumours were longer than benign forms. Bone involvement was only observed with malignancy. CLINICAL SIGNIFICANCE: Although CT is likely to play a limited role in the advanced workup of uterine and vaginal mesenchymal neoplasms, CT may represent a more accessible diagnostic tool than MRI and results of this study may help imagers familiarise themselves with their appearances.


Assuntos
Doenças do Cão , Neoplasias , Neoplasias Vaginais , Animais , Doenças do Cão/diagnóstico por imagem , Cães , Feminino , Imagem por Ressonância Magnética , Neoplasias/veterinária , Estudos Retrospectivos , Tomografia Computadorizada por Raios X/veterinária , Neoplasias Vaginais/diagnóstico por imagem , Neoplasias Vaginais/veterinária
3.
J Small Anim Pract ; 62(3): 178-186, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33496045

RESUMO

OBJECTIVES: To assess the accuracy of the lung ultrasound protocol Vet BLUE, using thoracic CT as the reference standard, for the detection of thoracic pathology in dogs and cats. MATERIALS AND METHODS: Animals that had thoracic ultrasound and thoracic CT were prospectively recruited between May 2017 and September 2018. The Vet BLUE protocol was performed on animals at the time of admission by veterinarians with basic training in emergency ultrasound. A board-certified radiologist, blinded to the Vet BLUE findings, reviewed the CT images. RESULTS: CT was abnormal in 64.5% (20/31) animals. The number of CT sites positive for alveolar-interstitial syndrome was 24.2% (60/248). When using CT as the reference standard, detection of ≥3 B lines with thoracic ultrasound had a sensitivity of 18.33% and specificity of 98.4% for detection of site specific alveolar-interstitial syndrome. The sensitivity of Vet BLUE to detect alveolar-interstitial syndrome increased to 56.9% when including the presence of any B line as abnormal. Overall accuracy for detection of alveolar-interstitial syndrome based on these two criteria was 79% and 73%, respectively. Vet BLUE correctly identified consolidation in 58.3% (14/24) sites, pleural effusion in 66.6% (2/3) cases, pneumothorax in 33.3% (1/3) cases and intrathoracic mass in 25% (1/4) cases. CLINICAL SIGNIFICANCE: The Vet BLUE protocol is a useful technique to detect alveolar-interstitial syndrome and other thoracic pathology but should not be used as a sole imaging method. Detection of ≥3 B lines is highly suggestive of alveolar-interstitial syndrome and warrants further diagnostics.


Assuntos
Doenças do Gato , Doenças do Cão , Pneumotórax , Médicos Veterinários , Animais , Doenças do Gato/diagnóstico por imagem , Gatos , Doenças do Cão/diagnóstico por imagem , Cães , Humanos , Pulmão/diagnóstico por imagem , Pneumotórax/diagnóstico por imagem , Pneumotórax/veterinária , Ultrassonografia/veterinária
4.
J Small Anim Pract ; 62(2): 114-122, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33403667

RESUMO

OBJECTIVES: Cytological biopsies are an integral additional test to an abdominal ultrasound when a lesion is identified, but there is little published on factors that that may impact achieving a clinically useful sample of gastrointestinal lesions obtained by ultrasound-guided fine-needle cytologic biopsy. This retrospective, descriptive study aimed to assess factors that may influence the clinical usefulness of submitted cytological samples collected from gastrointestinal lesions by ultrasound-guided percutaneous fine-needle cytologic biopsy. MATERIAL AND METHODS: Gastrointestinal cytological samples obtained from 25 dogs and 19 cats over 2.5 years were reviewed and determined as clinically useful or clinically useless as per the cytology report. Variables dependent on the ultrasound exam that were used in the analysis included lesion location, lesion thickness, loss of gastrointestinal layering, and the number of slides submitted. RESULTS: Thirty (30/44) of the submitted cytological samples were considered clinically useful. Factors associated with achieving a clinically useful sample in univariable models included the number of slides submitted and the thickness of the lesion. However, these two variables appear inter-related, as a weak correlation existed between them. Where histologic biopsies were obtained, a clinically useful sample had a partial or complete agreement with histology in three of 12 and eight of 12 cases, respectively. CLINICAL SIGNIFICANCE: Ultrasound-guided fine-needle cytological biopsies of gastrointestinal masses provided a clinically useful sample in two-third of the cases, especially if more slides were provided to the cytologist and thicker lesions were sampled.


Assuntos
Doenças do Gato , Doenças do Cão , Animais , Biópsia por Agulha Fina/veterinária , Doenças do Gato/diagnóstico por imagem , Gatos , Doenças do Cão/diagnóstico por imagem , Cães , Estudos Retrospectivos , Ultrassonografia de Intervenção/veterinária
5.
J Small Anim Pract ; 62(4): 272-278, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33346909

RESUMO

OBJECTIVES: (1) To report the clinical features of luxation of the superficial digital flexor tendon in dogs and (2) to report the outcome and complications of a novel surgical technique where postoperative immobilisation was not used. MATERIALS AND METHODS: Medical records from one Swedish veterinary hospital were retrospectively reviewed for cases of superficial digital flexor tendon treated by the author, between July 2007 and August 2019, where a temporary restraining pin was used as part of the surgical repair. RESULTS: Twenty-three procedures were performed in 19 dogs. Fourteen of the dogs were Shetland Sheepdogs with five other breeds represented. Lateral luxation occurred in all but one case. Minor complications occurred in eight cases (35%). Major complications requiring unplanned surgery occurred in three cases (13%). All cases ultimately returned to their pre-injury level of activity. CLINICAL SIGNIFICANCE: The use of a temporary restraining pin is useful in the surgical repair of superficial digital flexor tendon luxation. All cases were successfully treated without using post-operative immobilisation of the tarsal joint. Plain radiography is unreliable in the identification of morphological defects of the calcaneus.


Assuntos
Calcâneo , Doenças do Cão , Luxações Articulares , Animais , Doenças do Cão/diagnóstico por imagem , Doenças do Cão/cirurgia , Cães , Luxações Articulares/veterinária , Radiografia , Estudos Retrospectivos , Tendões
6.
Am J Vet Res ; 81(12): 940-949, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33251842

RESUMO

OBJECTIVE: To evaluate the effect of kernel and window settings on the assessment of small and complicated vasculature in CT angiographic (CTA) images of kidneys, jejunum with mesentery, and tumors in dogs. ANIMALS: 20 healthy dogs and 20 dogs with tumors. PROCEDURES: Images from CTA performed previously in dogs were reconstructed with 3 different combinations of kernel and window settings (soft kernel with soft tissue window, soft kernel with bone window, and sharp kernel with bone window), and reconstructed images of the left kidney and the jejunum with the mesentery in healthy dogs and tumors in affected dogs were evaluated by reviewers blinded to the settings. RESULTS: For images of kidney and jejunum with mesentery, reviewers' scores for the conspicuity of vascularity in the arterial phase and the differentiation of the organs from the adjacent structures were significantly higher when viewed in bone window (vs soft tissue window) regardless of kernel setting. For images of head and gastrointestinal tumors, reviewers' scores for differentiation of intratumoral vasculature were higher when viewed in sharp kernel with bone window versus other setting combinations. However, the conspicuity of gastrointestinal, hepatic, or splenic tumoral vessels from the adjacent structures had higher reviewer scores for images in soft kernel with soft tissue window, compared with other setting combinations. CONCLUSIONS AND CLINICAL RELEVANCE: Results indicated that reconstruction of CTA images with sharp kernel combined with bone window settings might have clinical utility in evaluating and planning treatments for dogs with various tumors; however, additional research is warranted to further identify effects of various kernel and window setting combinations on assessments of small and complicated vasculature in larger and more diverse populations of dogs with and without tumors.


Assuntos
Doenças do Cão , Neoplasias , Angiografia , Animais , Angiografia por Tomografia Computadorizada/veterinária , Doenças do Cão/diagnóstico por imagem , Cães , Cabeça , Neoplasias/diagnóstico por imagem , Neoplasias/veterinária , Tomografia Computadorizada por Raios X/veterinária
9.
PLoS One ; 15(10): e0240091, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33002083

RESUMO

Hydrocephalus occurs more often in brachycephalic individuals of different species. Detailed analysis of rostral cranial fossa-region of cerebrospinal fluid outflow-is necessary to understand causes leading to hydrocephalus in specimens with shortened skull. The objective of the study was to determine morphology and morphometry of rostral cranial fossa in brachycephalic dogs. Skulls of 126 dogs of different breeds and morphotypes were examined using computed tomography. Linear and volumetric measurement in the region of rostral cranial fossa and skull base were made. In brachycephalic dogs there is shortening of rostral cranial fossa which is linked with the volume reduction of this region. There are differences in skull base shape between brachycephalic dogs and other morphotypes. Similarities between brachycephalic dogs and patients with craniosynostoses were noted.


Assuntos
Craniossinostoses/veterinária , Doenças do Cão/diagnóstico por imagem , Doenças do Cão/patologia , Crânio/diagnóstico por imagem , Crânio/patologia , Tomografia Computadorizada por Raios X , Animais , Craniossinostoses/diagnóstico por imagem , Craniossinostoses/patologia , Cães
10.
J Small Anim Pract ; 61(11): 659-668, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33035379

RESUMO

OBJECTIVE: To re-evaluate the anatomy and classification of congenital extrahepatic portosystemic shunts entering the caudal vena cava at the level of the omental foramen. MATERIAL AND METHODS: A retrospective review of a consecutive series of dogs undergoing CT angiography as part of the diagnostic work-up for a congenital extrahepatic portosystemic shunt. RESULTS: In total, 53 dogs met the inclusion criteria revealing four anatomically distinct omental foramen shunt types; one of which (32 of 53 dogs) showed no shunting blood flow through the right gastric vein and three of which (21 of 53 dogs) involved shunting flow through this vessel. The anatomy of these four distinct shunt types, as defined by CT angiography, was found to be highly consistent. In all cases, regardless of the tributary vessels, the left gastric vein was the final vessel that communicated with the caudal vena cava. Using these findings, a more accurate naming classification for congenital portosystemic shunts entering the caudal vena cava at the level of the omental foramen was proposed. CLINICAL SIGNIFICANCE: A precise pre-treatment anatomical classification of congenital extrahepatic portosystemic shunts entering the caudal vena cava at the level of the omental foramen is important for a more complete understanding of the severity of clinical signs and prognosis, and for the better communication between clinicians and researchers in this clinical field.


Assuntos
Doenças do Cão , Animais , Doenças do Cão/diagnóstico por imagem , Cães , Sistema Porta/diagnóstico por imagem , Veia Porta , Derivação Portossistêmica Cirúrgica/veterinária , Estudos Retrospectivos , Veia Cava Inferior/diagnóstico por imagem
11.
PLoS One ; 15(9): e0238598, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32886725

RESUMO

OBJECTIVE: To quantify changes in the patellar tendon length following surgical correction of medial patellar luxation in dogs and evaluate potential risk factors associated with patellar tendon elongation. STUDY DESIGN: Retrospective case series (n = 50). METHODS: Dogs that underwent surgery for medial patellar luxation correction and had 2-3 months follow up were included. Digital radiographs were utilized to quantify the patellar tendon length to patellar length ratio at various follow-up points. Odds ratio comparisons between potential risk factors associated with changes in patellar tendon length were performed. RESULTS: Post-operative patellar tendon lengthening of ≥ 5% was observed in 20% of stifles and post-operative patellar tendon shortening of ≥ 5% was observed in 22% of stifles at the 2-3 month follow up period. The risk factors including age, body weight, trochleoplasty and grade of medial patellar luxation were not significantly associated with risk of patellar tendon elongation. Patellar tendon lengthening was not associated with recurrence of luxation. CONCLUSION: Patellar tendon lengthening and shortening can be observed in dogs following common medial patellar luxation corrective procedures in the short term follow up period. Patellar tendon lengthening does not appear to be associated with age, weight, trochleoplasty, grade of luxation, or risk of luxation recurrence.


Assuntos
Doenças do Cão/diagnóstico por imagem , Doenças do Cão/cirurgia , Luxação Patelar/veterinária , Ligamento Patelar/diagnóstico por imagem , Animais , Cães , Luxação Patelar/diagnóstico por imagem , Luxação Patelar/cirurgia , Ligamento Patelar/cirurgia , Período Pós-Operatório , Radiografia
13.
Vet J ; 262: 105505, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32792095

RESUMO

The purpose of this study was to develop a computer-aided detection (CAD) device based on convolutional neural networks (CNNs) to detect cardiomegaly from plain radiographs in dogs. Right lateral chest radiographs (n = 1465) were retrospectively selected from archives. The radiographs were classified as having a normal cardiac silhouette (No-vertebral heart scale [VHS]-Cardiomegaly) or an enlarged cardiac silhouette (VHS-Cardiomegaly) based on the breed-specific VHS. The database was divided into a training set (1153 images) and a test set (315 images). The diagnostic accuracy of four different CNN models in the detection of cardiomegaly was calculated using the test set. All tested models had an area under the curve >0.9, demonstrating high diagnostic accuracy. There was a statistically significant difference between Model C and the remainder models (Model A vs. Model C, P = 0.0298; Model B vs. Model C, P = 0.003; Model C vs. Model D, P = 0.0018), but there were no significant differences between other combinations of models (Model A vs. Model B, P = 0.395; Model A vs. Model D, P = 0.128; Model B vs. Model D, P = 0.373). Convolutional neural networks could therefore assist veterinarians in detecting cardiomegaly in dogs from plain radiographs.


Assuntos
Cardiomegalia/veterinária , Aprendizado Profundo , Doenças do Cão/diagnóstico por imagem , Radiografia Torácica/veterinária , Animais , Cardiomegalia/diagnóstico por imagem , Cães , Redes Neurais de Computação , Estudos Retrospectivos
14.
J Vet Sci ; 21(4): e52, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32735091

RESUMO

BACKGROUND: Intradural-intramedullary intervertebral disc extrusion (IIVDE) is a rare condition of intervertebral disc disease. However, the diagnosis of IIVDE is challenging because the prognosis and imaging characteristics are poorly characterized. OBJECTIVES: We aimed to describe the clinical and imaging characteristics of tentatively diagnosed IIVDE in dogs to assess the prognostic utility of neurological grade and magnetic resonance imaging (MRI) findings. METHODS: Twenty dogs were included in this retrospective cohort study. RESULTS: Nonchondrodystrophic breeds (n = 16) were more predisposed than chondrodystrophic breeds. Most dogs showed acute onset of clinical signs. Neurological examination at admission showed predominant non-ambulatory paraparesis (n = 9); paresis (n = 16) was confirmed more frequently than paralysis (n = 4). Follow-up neurological examination results were only available for 11 dogs, ten of whom showed neurological improvement and 8 showed successful outcomes at 1 month. The characteristic MRI findings include thoracic vertebra (T)2 hyperintense, T1 hypointense, intramedullary linear tracts with reduced disc volume, and cleft of the annulus fibrosus. None of the MRI measurements were significantly correlated with neurological grade at admission. Neurological grade did not differ according to the presence of parenchymal hemorrhage, parenchymal contrast enhancement, and meningeal contrast enhancement. Neurological grades at admission showed a statistical correlation with those observed at the 1-month follow-up (r = 0.814, p = 0.02). CONCLUSIONS: IIVDE is a rare form of disc extrusion commonly experienced after physical activity or trauma and most frequently affects the cranial-cervical and thoracolumbar regions of nonchondrodystrophic dog breeds. Neurological score at admission emerged as a more useful prognostic indicator than MRI findings in dogs with suspected IIVDE.


Assuntos
Doenças do Cão/diagnóstico , Degeneração do Disco Intervertebral/veterinária , Deslocamento do Disco Intervertebral/veterinária , Vértebras Torácicas/patologia , Animais , Doenças do Cão/diagnóstico por imagem , Cães , Feminino , Degeneração do Disco Intervertebral/diagnóstico , Degeneração do Disco Intervertebral/diagnóstico por imagem , Deslocamento do Disco Intervertebral/diagnóstico , Deslocamento do Disco Intervertebral/diagnóstico por imagem , Imagem por Ressonância Magnética/veterinária , Masculino , Estudos Retrospectivos , Vértebras Torácicas/diagnóstico por imagem
15.
J Vet Sci ; 21(4): e58, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32735096

RESUMO

BACKGROUND: Quantitative evaluation of renal cortical echogenicity (RCE) has been tried and developed in human and veterinary medicine. OBJECTIVES: The objective of this study was to propose a method for evaluating RCE quantitatively and intuitively, and to determine associations between ultrasonographic renal structural distinction and estimated glomerular filtration rate (eGFR) in canine chronic kidney disease (CKD). METHODS: Data were collected on 63 dogs, including 27 with normal kidney function and 36 CKD patients. Symmetric dimethylarginine and creatinine concentrations were measured for calculating eGFR. RCE was evaluated as 3 grades on ultrasonography images according to the distinction between the renal cortex and outer medulla. The RCE grade of each kidney was measured. RESULTS: There was a significant difference in eGFR between the group normal and CKD (p < 0.001). As mean of RCE grades (the mean values of each right and left kidney's RCE grade) increases, the proportion of group CKD among the patients in each grade increases (p < 0.001). Also, severity of RCE (classified as "high" if any right or left kidney evaluated as RCE grade 3, "low" otherwise) and eGFR is good indicator for predicting group CKD (p < 0.001). CONCLUSIONS: The degree of distinction between the renal cortex and the outer medulla is closely related to renal function including eGFR and the RCE grade defined in this study can be used as a method of objectively evaluating RCE.


Assuntos
Doenças do Cão/diagnóstico por imagem , Taxa de Filtração Glomerular , Córtex Renal/diagnóstico por imagem , Medula Renal/diagnóstico por imagem , Insuficiência Renal Crônica/veterinária , Ultrassonografia/veterinária , Animais , Doenças do Cão/fisiopatologia , Cães , Insuficiência Renal Crônica/diagnóstico por imagem , Insuficiência Renal Crônica/fisiopatologia
18.
Aust Vet J ; 98(10): 499-503, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32671818

RESUMO

This retrospective case study aims to evaluate the accuracy of menace response, response to nasal stimulation and proprioceptive placing in diagnosing forebrain lesion in dogs. A total of 145 client-owned dogs investigated by magnetic resonance imaging study of the brain between December 2017 and June 2019 were evaluated. Seventy-one dogs with no magnetic resonance imaging-detectable intracranial and significant cerebrospinal fluid abnormality or recent history of seizure (<48 h) served as controls. Binary regression analysis was performed to determine the sensitivity, specificity and likelihood ratios of each selected test. Older age at presentation was a significant risk factor for the presence of a forebrain lesion. Menace (62.5%) and proprioceptive deficits (40.5%) were common findings in all dogs. They were also significantly associated with the presence of forebrain abnormality. Moreover, they were more sensitive (77.3% and 82.2%, respectively) and specific (50.0% and 62.5%, respectively) when applied to dogs aged 6 years or older. Nonetheless, all of these tests' likelihood ratios, and thus reliability are poor. These neurological tests are commonly employed for diagnosing forebrain disease in dogs, yet are not highly accurate in diagnosing forebrain abnormality. Clinicians should interpret these clinical test results along with the patient history when designing a diagnostic plan.


Assuntos
Doenças do Cão/diagnóstico por imagem , Doenças do Cão/diagnóstico , Animais , Cães , Imagem por Ressonância Magnética/veterinária , Prosencéfalo , Reprodutibilidade dos Testes , Estudos Retrospectivos
19.
Acta Vet Scand ; 62(1): 32, 2020 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-32563254

RESUMO

BACKGROUND: Lissencephaly is a brain malformation characterized by smooth and thickened cerebral surface, which may result in structural epilepsy. Lissencephaly is not common in veterinary medicine. Here, we characterize the first cases of lissencephaly in four Shih Tzu dogs, including clinical presentations and findings of magnetic resonance imaging of lissencephaly and several concomitant brain malformations. CASE PRESENTATION: Early-onset acute signs of forebrain abnormalities were observed in all dogs, which were mainly cluster seizures and behavioral alterations. Based on neurological examination, the findings were consistent with symmetrical and bilateral forebrain lesions. Metabolic disorders and inflammatory diseases were excluded. Magnetic resonance imaging for three dogs showed diffuse neocortical agyria and thickened gray matter while one dog had mixed agyria and pachygyria. Other features, such as internal hydrocephalus, supracollicular fluid accumulation, and corpus callosum hypoplasia, were detected concomitantly. Antiepileptic drugs effectively controlled cluster seizures, however, sporadic isolated seizures and signs of forebrain abnormalities, such as behavioral alterations, central blindness, and strabismus persisted. CONCLUSIONS: Lissencephaly should be considered an important differential diagnosis in Shih Tzu dogs presenting with early-onset signs of forebrain abnormalities, including cluster seizures and behavioral alterations. Magnetic resonance imaging was appropriate for ante-mortem diagnosis of lissencephaly and associated cerebral anomalies.


Assuntos
Anticonvulsivantes/uso terapêutico , Doenças do Cão/diagnóstico por imagem , Epilepsia/veterinária , Lisencefalia/veterinária , Animais , Doenças do Cão/congênito , Doenças do Cão/diagnóstico , Cães , Epilepsia/tratamento farmacológico , Epilepsia/etiologia , Feminino , Lisencefalia/complicações , Lisencefalia/diagnóstico , Lisencefalia/diagnóstico por imagem , Imagem por Ressonância Magnética/veterinária , Masculino
20.
Vet Radiol Ultrasound ; 61(4): 399-408, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32350994

RESUMO

Abdominal radiographs are commonly used in dogs and cats that present with gastrointestinal signs. When initial abdominal radiographs are equivocal for the presence or absence of gastrointestinal mechanical obstruction, follow-up abdominal radiographs may be recommended. Based on our review of the literature, no published study has been performed to evaluate the clinical utility of serial abdominal radiographs in such cases. The purpose of this study is to determine whether follow-up abdominal radiographs increase diagnostic accuracy for mechanical obstruction. A prospective cohort study was performed on client-owned dogs and cats with clinical concern for gastrointestinal mechanical obstruction and initial abdominal radiographs inconclusive for the presence of obstruction. Follow-up abdominal radiographs were performed between 7 and 28 h of the initial radiographs; an abdominal ultrasound performed within 3 h of the follow-up study served as the gold standard. A total of 57 patients (40 dogs and 17 cats) were recruited; 19 of 57 cases (11 dogs; 8 cats) were mechanically obstructed, all with nonradiopaque foreign bodies. Four blinded reviewers (2 radiologists, 1 radiology resident, 1 criticalist) separately assessed the initial and the combined initial/follow-up radiographic studies for diagnosis of mechanical obstruction; for each observer, there was no significant change in accuracy (P = .058-.87) for the diagnosis of mechanical obstruction. Given the lack of significant increase in diagnostic accuracy using follow-up radiographs in cases of occult gastrointestinal mechanical obstruction, other diagnostic options (eg, abdominal ultrasonography) could be considered when survey abdominal radiographs are inconclusive for the diagnosis of mechanical obstruction in dogs and cats.


Assuntos
Doenças do Gato/diagnóstico por imagem , Doenças do Cão/diagnóstico por imagem , Corpos Estranhos/veterinária , Obstrução Intestinal/veterinária , Ultrassonografia/veterinária , Animais , Gatos , Estudos de Coortes , Cães , Seguimentos , Corpos Estranhos/diagnóstico por imagem , Obstrução Intestinal/diagnóstico por imagem , Estudos Prospectivos , Radiografia , Radiografia Abdominal/veterinária
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