COMPARISON OF FLUOROSCOPY AND COMPUTED TOMOGRAPHY FOR TRACHEAL LUMEN DIAMETER MEASUREMENT AND DETERMINATION OF INTRALUMINAL STENT SIZE IN HEALTHY DOGS          下载免费PDF全文

Jackie M. Williams  Ingar A. Krebs  Elizabeth A. Riedesel  Qianqian Zhao 《Veterinary radiology & ultrasound》2016,57(3):269-275

Tracheal collapse is a progressive airway disease that can ultimately result in complete airway obstruction. Intraluminal tracheal stents are a minimally invasive and viable treatment for tracheal collapse once the disease becomes refractory to medical management. Intraluminal stent size is chosen based on the maximum measured tracheal diameter during maximum inflation. The purpose of this prospective, cross‐sectional study was to compare tracheal lumen diameter measurements and subsequent selected stent size using both fluoroscopy and CT and to evaluate inter‐ and intraobserver variability of the measurements. Seventeen healthy Beagles were anesthetized and imaged with fluoroscopy and CT with positive pressure ventilation to 20 cm H₂O. Fluoroscopic and CT maximum tracheal diameters were measured by three readers. Three individual measurements were made at eight predetermined tracheal sites for dorsoventral (height) and laterolateral (width) dimensions. Tracheal diameters and stent sizes (based on the maximum tracheal diameter + 10%) were analyzed using a linear mixed model. CT tracheal lumen diameters were larger compared to fluoroscopy at all locations (P‐value < 0.0001). When comparing modalities, fluoroscopic and CT stent sizes were statistically different. Greater overall variation in tracheal diameter measurement (height or width) existed for fluoroscopy compared to CT, both within and among observers. The greater tracheal diameter measured with CT and lower measurement variability has clinical significance, as this may be the imaging modality of choice for appropriate stent selection to minimize complications in veterinary patients.  相似文献   

A pilot study on the effect of fat loading on the gastrointestinal tract of healthy dogs     

J.-S. Palerme  A. Silverstone  E. A. Riedesel  K. M. Simone  J. S. Pomrantz 《The Journal of small animal practice》2020,61(12):732-737

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Multinucleate erythrocytes in a brown kiwi (Apteryx mantelli)     

EKP Jillings  BD Gartrell  KJ Morgan  DH Hopcroft 《New Zealand veterinary journal》2013,61(2)

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Different Culture Media Requirements of IVF and Nuclear Transfer Bovine Embryos   总被引：3，自引：0，他引：3  

GF Mastromonaco  E Semple  C Robert  GJ Rho  DH Betts  WA King 《Reproduction in domestic animals》2004,39(6):462-467

Important differences exist between in vitro fertilized (IVF) and nuclear transfer (NT) bovine embryos. Studies have shown that although in vitro development is comparable, post-implantation survival is greatly reduced in NT embryos. In this study, we compare serum and bovine serum albumin (BSA) supplementation during oocyte maturation and embryo culture of IVF and NT embryos. In experiment 1, oocytes and embryos were randomly distributed into different treatment groups consisting of synthetic oviductal fluid (SOF) medium supplemented with either serum, fatty acid-free BSA (FAF) or fraction V BSA during maturation and/or culture to assess IVF embryo development. In experiment 2, oocytes were matured in SOF + serum or SOF + FAF and reconstructed embryos were cultured in SOF + FAF to assess NT embryo development. Among the IVF treatment groups, a greater number of blastocysts were observed in the steer serum (SER) group (IVM and IVC in SOF + serum) on day 6; however, no significant differences were seen in blastocyst development from day 8 onwards. Hatching frequencies on days 8 and 9 were significantly greater in groups with serum, with the exception of FAF (IVM and IVC in SOF + FAF) on day 9. For the NT treatment groups, the presence of serum during IVM resulted in a higher proportion of MII oocytes and increased blastocyst development and hatching rates were compared with supplementation of FAF. These results indicate that both serum and FAF provide comparable embryo development for IVF but not for NT bovine embryos.  相似文献   

Subcutaneous granuloma caused by Mycobacterium avium complex infection in a cat     

R. MALIK  L. GABOR  P. MARTIN  DH MITCHELL  DJ DAWSON 《Australian veterinary journal》1998,76(9):604-607

A localised subcutaneous swelling developed on the nasal bridge of a cat receiving chemotherapy for alimentary tract lymphosarcoma. Cytological and histological examination of representative samples of the lesion demonstrated pyogranulomatous inflammation and abundant acid-fast bacilli. A Mycobacterium sp was cultured from tissue excised from the lesion. Extensive testing at three reference laboratories indicated the strain was a member of the Mycobacterium avium complex. The infection was treated successfully by cytoreductive surgery and a 6 weeks course of orally administered clofazimine.  相似文献   

Electrocardiography‐guided and retrospective analysis of central venous catheter placement in the dog     

Andrew K Claude  Dean H Riedesel  Elizabeth A Riedesel 《Veterinary anaesthesia and analgesia》2010,37(2):97-105

Objective To compare the success rates of central venous catheter placement (CVCP) in dogs using electrocardiograph (ECG)‐guided and external landmark (‘blind’) techniques. To report success rates determined retrospectively of CVCPs in dogs using external landmarks at a tertiary referral institution. Study design Prospective blinded comparison of techniques. Retrospective analysis of case records. Animals Adult Beagles weighing 11.9 ± 2.6 kg were used in the experimental group (n = 38). Various breeds of dogs were in the retrospective clinical group (n = 33). Methods Laboratory dogs were anesthetized and CVCPs were placed using a modified Seldinger technique. Catheter tip position was first based on external landmarks and then the catheter was repositioned using an ECG‐guided placement. The ECG‐guided technique used the V‐lead with the positive electrode attached to the guide wire. Catheter placement was determined by moving the catheter cephalad and caudad to the point of maximum p‐wave amplitude and then withdrawing the catheter 1–2 cm from this point. Catheter position with each technique was determined using a lateral thoracic radiograph. Retrospective data were collected from the medical records of dogs that had CVCPs using anatomical landmarks and corresponding thoracic radiographs. Results The number of successful CVCP attempts was the same for both prospective groups (21/38). There was no statistically significant difference in success between the ECG‐guided technique and the blind technique. From the retrospective investigation 10/33 of the cases that fit the criteria had correct CVCPs. Conclusions and clinical relevance The odds of correctly placing a central venous catheter by ECG‐guidance were the same as the external landmark technique. The ECG‐guided technique may be useful in situations where external landmarks are not readily available.  相似文献   

Asymmetric scattering of polarized electrons by organized organic films of chiral molecules     

K Ray  SP Ananthavel  DH Waldeck  R Naaman 《Science (New York, N.Y.)》1999,283(5403):814-816

Electron transmission experiments demonstrate a large asymmetry in the scattering probability of polarized electrons by thin organized films of chiral molecules. This large asymmetry results from the interaction of the electron's wavefunction with many scatterers (molecules) in the organized monolayer structure and represents a manifestation of quantum interference on the scale of supramolecular lengths.  相似文献   

Right-to-left patent ductus arteriosus with dysplastic left ventricle in a dog     

S E O'Brien  E A Riedesel  R K Myers  D H Riedesel 《Journal of the American Veterinary Medical Association》1988,192(10):1435-1438

A 6-week-old Siberian Husky pup had an unusual group of congenital heart anomalies that included a right-to-left patent ductus arteriosus, a small left ventricular chamber and ascending aorta, and a dysplastic mitral valve that may have been stenotic. Anomalies were diagnosed, using cardiac catheterization, angiocardiography, and blood gas determinations. Findings were confirmed by postmortem examination.  相似文献   

The Effect of Prostaglandin E₂ on the Cervices of Dioestrous and Prepartum Mares     

DH Volkmann  HJ Bertschinger  ML Schulman 《Reproduction in domestic animals》1995,30(4):240-244

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Hypoxemia in the Acutely Traumatized Canine Patient     

Martha L. Buttrick DVM    Dean H. Riedesel DVM  PhD    Barbara A. Selcer DVM  Robert D. Barstad DVM  MS 《Journal of Veterinary Emergency and Critical Care》1992,2(2):73-79

One hundred acutely traumatized dogs were evaluated for the presence of cardiopulmonary abnormalities with thoracic radiographs, electrocardiography and arterial blood gas analysis. Fifty-seven dogs were found to have concurrent appendicular fracture(s) and thoracic injury as defined by an abnormality in one or more of the variables evaluated. Thoracic radiographs were abnormal in 44 dogs. Ventricular arrhythmias were identified in 17 dogs. Hypoxemia (PaO₂ < 80 mmHg) was detected in 25 dogs. Hypoxemia was noted with increased frequency in dogs with abnormal thoracic radiographs. Ventricular arrhythmias occurred more frequently in the hypoxemic group of dogs.
Although a relationship was noted between the presence of hypoxemia, radiographic changes of the thorax and ECG abnormalities, all three examinations provided important information for assessing the cardiopulmonary status of each patient.  相似文献