COMPUTED TOMOGRAPHIC IMAGING OF NASAL DISEASE IN 100 DOGS

One hundred dogs with nasal disease were evaluated by computed tomography (CT). Certain findings were significantly correlated with neoplasia. These included patchy areas of increased density within soft tissue opacity, destruction of part or all of the ethmoid bones, abnormal soft tissue in the retrobulbar spaces, destruction of one or both the lateral maxillae, destruction of the nasal bone or rostral dorsal maxilla, or hyperostosis of the lateral maxilla. Combinations of these findings were even more significant for neoplasia. No single finding or combination of findings was absolutely definitive of neoplasia. The results of this study are useful in indicating that biopsy results should be questioned if one or more of the above factors is present and a diagnosis of inflammation is made.     

小型中央空调系统热经济学优化设计分析

建立了户式中央空调常用制冷剂HCFC22热物性的仿真模型，在VC 环境下编制了仿真程序；提出了户式中央空调系统的热经济学优化方法，对典型的户式中央空调系统进行了热力学和热经济学优化，并对两者优化结果进行了比较。结果表明，户式中央空调系统的热经济学优化方法能够克服热力学优化方法的弊端，有利于减少系统的年生产费用，是一种值得推广使用的新方法。     

Comparison of unilateral versus bilateral nasal catheters for oxygen administration in dogs

Objective: To determine the effect of bilateral nasal oxygen supplementation on tracheal airway and arterial blood gas parameters. Design: Original research. Setting: Research Laboratory. Animals: Eight normal dogs. Interventions: None. Measurements: Intra‐tracheal oxygen concentration and arterial oxygen partial pressure at three different oxygen flow rates given through either unilateral or bilateral nasal catheters. Main results: F_IO₂ and PaO₂ were significantly increased with higher total oxygen flow rates, but the increase was the same whether the higher flow was delivered through one nasal catheter or divided and administered though two nasal catheters. The use of bilateral nasal catheters allowed a tracheal F_IO₂ as high as 0.60 with minimal patient discomfort. Conclusions: The benefit of bilateral nasal catheters for oxygen supplementation is the ability to provide high total oxygen flows with decreased risk of patient discomfort. If the desired oxygen flow can be achieved with a unilateral nasal catheter, then the only benefit of bilateral catheters is increased patient comfort. The use of bilateral nasal oxygen catheters for oxygen supplementation can result in an F_IO₂ that is high enough to produce oxygen toxicity with prolonged administration.     

Chronic Nasal Disease in the Dog: Its Radiographic Diagnosis

The radiographic signs of 40 dogs with chronic nasal disease were tabulated and compared with the definitive diagnoses. Erosion of the vomer bone and/or an external mass were present in 16 of 18 dogs that had nasal tumors. Areas of radiolucency in the nasal cavity were present in 8 of 15 dogs that had nasal fungal disease. Radiographic examination did not provide a highly reliable diagnosis for all dogs with chronic nasal disease.     

Devitalization of salmonellae in fish meals with propionic acid

Animal protein feeds are regarded as a potential source of salmonellae for the animal and human population. Decontamination is carried out by various methods. At the present time, propionic acid is recommended for this purpose but different levels of concentration have been given by various authors. In our experiments broth cultures of the following serotypes were used for artifical contamination: Salmonella typhimurium, S. taksony and S. senftenberg. The infected fish meal always contained 200,000 salmonellae in 1 g. The addition of 3% propionic acid resulted in an immediate devitalization of salmonellae. The addition of 2% propionic acid caused devitalization within 49 days. Salmonella senftenberg was found to be the most resistant of the three serotypes tested. The active substance must be perfectly homogenized. The addition of 0.3% propionic acid has proved effective in broth.     

COMPUTED TOMOGRAPHIC IMAGING OF THE EQUINE HEAD

The head from three horses euthanized due to diseases unrelated to the head and neck was imaged using computed tomography (CT). Gross cross-sectional slices of equine head #1 and skeleton of equine head #2 were compared with the CT images of the three equine heads to identify normal structures of the cranium, brain, paranasal sinuses, nasal cavity, and teeth. Labeled transverse CT images of the equine head are presented sequentially as a reference for normal anatomy.     

岩溶山区植被破坏前后土壤团聚体稳定性研究

用C-D试剂浸提和浸泡振荡处理两种方法分析了岩溶地区不同土地利用方式和植被类型土壤的水稳性团聚体变化情况。利用方式和植被类型对土壤团聚体的形成有较大影响,不仅影响到土壤表层团聚体的组成和质量,而且对表层以下不同深度的土壤团聚体特征均有较大影响。土壤中游离氧化铁铝对提高土壤团聚体稳定性影响也表现显著,但浸泡振荡处理后水稳性团聚体含量的下降大于C-D试剂浸提处理。     

Efficacy of chemotherapy and palliative hypofractionated radiotherapy for cats with nasal lymphoma

Nasal lymphoma (NL) is the most common nasal tumor in cats, and radiotherapy, chemotherapy, or a combination of these treatments have been described as the treatment for this disease. However, the previous studies included various machines and protocols of radiotherapy. Therefore, we aimed to retrospectively compare the prognosis among cases treated with palliative hypofractionated radiotherapy, chemotherapy, and a combination of them with united machine and protocol of radiotherapy. When compared overall survival and progression free survival, there was no significant difference among these three groups. The data of this study suggested that similar efficacy could be achieved by palliative hypofractionated radiotherapy, chemotherapy, or a combination of them.     

Nasopharyngeal nephroblastoma in a 3-month-old Boer goat

A 3-mo-old, female Boer goat was presented because of respiratory difficulties. Tachypnea and inspiratory dyspnea were noted during physical examination. Thoracic radiographs were unremarkable; however, upper airway and nasal passage radiographs revealed a soft tissue mass within the nasal passages. The patient underwent cardiorespiratory arrest and did not respond to resuscitation efforts during endoscopy. A large, pedunculated, semi-firm mass originated from the soft palate and obstructed 90% of the nasopharynx on autopsy. Histologically, the mass was composed of primitive cells that multifocally formed tubules and glomeruloid structures intermingled with areas of fusiform and blastemal cells. The neoplastic cells were positive for cytokeratin (tubular and glomeruloid cells), vimentin (fusiform population and blastemal cells), and Wilms tumor 1 protein (glomeruloid structures) on immunohistochemistry, consistent with a triphasic nephroblastoma. To our knowledge, nasopharyngeal nephroblastoma has not been reported previously in any species.