MAGNETIC RESONANCE ARTHROGRAPHY OF THE CANINE STIFLE JOINT TECHNIQUE AND APPLICATIONS IN ELEVEN MILITARY DOGS     

Catherine M.  Banfield  DVM  MS  William B.  Morrison  MD 《Veterinary radiology & ultrasound》2000,41(3):200-213

The stifle joints of eleven military working dogs were evaluated using conventional magnetic resonance (MR) imaging and MR arthrography. A protocol optimizing MR imaging of the canine stifle joint is discussed, as well as potential uses for administration of intra-articular gadolinium. The technique for performing MR arthrography is described, and post-contrast image findings are reviewed. MR arthrography was performed by using an intra-articular injection of diluted gadolinium. Consistently good quality images were obtained, and no complications were clinically detected following MR arthrography. Cranial cruciate ligament abnormalities were seen in six dogs, meniscal abnormalities were visualized in nine menisci, and synovitis and medial ligament strain were seen in eight dogs. Surgical and post-mortem confirmation of these findings is discussed in seven dogs. Although MR arthrography adds an invasive procedure to conventional MR imaging, it can provide useful information on pathologic changes in the canine stifle joint.  相似文献   

MAGNETIC RESONANCE IMAGING OF THE NORMAL AND DISEASED FELINE MIDDLE EAR     

Ingrid  Allgoewer  DVM  Susanne  Lucas  DVM  Stephan Albert  Schmitz  MD 《Veterinary radiology & ultrasound》2000,41(5):413-418

The magnetic resonance imaging appearance of the feline middle ear is described in three healthy cats and in five cats with middle ear disease. Owing to the good spatial resolution, multiplanar slice orientation as well as display high contrast resolution of soft tissue, in particular fluids, MR imaging was helpful prior to surgery. It is superior to radiography which failed to allow identification of the abnormality in two of our five cats. MR imaging for middle ear disease should include dorsal and transverse plane images using T1- and T2-weighted sequences. In the presence of a mass within the bulla or the external ear canal application of contrast medium is helpful.  相似文献   

Heavy Metal Contamination of Soil and Vegetation in the Vicinity of Industries in Bangladesh     

Kashem  MD. Abul  Singh  Bal Ram 《Water, air, and soil pollution》1999,115(1-4):347-361

Water, Air, &; Soil Pollution - A study was conducted to investigate the heavy metal contamination of soil and vegetation in the vicinity of industries around Dhaka city in Bangladesh....  相似文献   

COMPUTED TOMOGRAPHIC EVALUATION OF FINNHORSE CADAVER FOREFEET WITH RADIOGRAPHICALLY PROBLEMATIC FINDINGS ON THE FLEXOR ASPECT OF THE NAVICULAR BONE     

Mirja  Ruohoniemi  DVM  Pekka  Tervahartiala  MD 《Veterinary radiology & ultrasound》1999,40(3):275-281

Computed tomography (CT) was performed on 12 Finnhorse cadaver forefeet with known radiographic changes in the navicular bone (poor corticomedullary junction, irregular appearance of the flexor central eminence, uneven or unequal thickness of the flexor cortex, and/or irregular outline of the proximal or distal flexor margin). The purpose was to confirm the radiographic findings and to investigate if further information of the flexor aspect of the bone could be gained with CT. In CT, the midsagittal outline as well as the internal structure of the bones varied greatly. Different combinations of trabecular and compact bone were seen within the flexor central eminence. Lucencies within the compact bone were commonly present in the proximal half of the eminence, but in five bones lucencies were also identified in the distal half. Due to partial overlapping of the bone and varying bony composition of the eminence, accurate radiographic evaluation of the shape and internal structure of the flexor central eminence was often found to be difficult. The flexor cortex usually appeared to be thinner in CT than in conventional radiographs. Medullary sclerosis and poor flexor corticomedullary junction were commonly overinterpreted radiographically. New bone formation on the proximal flexor margin of the navicular bone was generally visualized in radiographs, but CT allowed also the evaluation of the internal structure of the bone. In one navicular bone, an avulsion fragment on the distal flexor margin was seen in CT images; radiographically this fragment could not be visualized. It was concluded that the flexor aspect of the navicular bone may be difficult to assess reliably with conventional radiography.  相似文献   

Arthroscopic Subchondral Bone Plate Microfracture Technique Augments Healing of Large Chondral Defects in the Radial Carpal Bone and Medial Femoral Condyle of Horses   总被引：8，自引：0，他引：8  

D.D. Frisbie  DVM  MS  Diplomate ACVS    G.W. Trotter  DVM  MS  Diplomate ACVS    B.E. Powers  DVM  PhD  Diplomate ACVP    W.G. Rodkey  DVM  Diplomate ACVS    J.R. Steadman  MD    R.D. Howard  DVM  PhD  Diplomate ACVS    R.D. Park  DVM  PhD  Diplomate ACVR    C.W. McIlwraith  BVSc  PhD  Diplomate ACVS   《Veterinary surgery : VS》1999,28(4):242-255

OBJECTIVE: To evaluate the effect of arthroscopic subchondral bone microfracture on healing of large chondral defects in horses. STUDY DESIGN: Short- (4 months) and long-term (12 months) in vivo experimental chondral defect model. ANIMALS: 10 horses, aged 2 to 5 years. METHODS: Each horse had a 1 cm2 full-thickness chondral defect created in both radial carpal bones and both medial femoral condyles. One carpus and one femoral condyle of each horse had the subchondral bone plate under the defect perforated using an orthopedic awl. All horses were exercised, five horses were evaluated after 4 months and five horses after 12 months. Gross, histologic, and histomorphometric examination of defect sites and repair tissues was performed, as was collagen typing of the repair tissue. RESULTS: On gross observation a greater volume of repair tissue filled treated defects (74%) compared with control defects (45%). Histomorphometry confirmed more repair tissue filling treated defects, but no difference in the relative amounts of different tissue types was observed. There was an increased percentage of type II collagen in treated defects compared with control defects and evidence of earlier bone remodeling as documented by changes in porosity. CONCLUSIONS: In full-thickness chondral defects in exercised horses, treatment with subchondral bone microfracture increased the tissue volume in the defects and the percentage of type II collagen in the tissue filling the defects when compared to nontreated defects. CLINICAL RELEVANCE: No negative effects of the microfracture technique were observed and some of the beneficial effects are the basis for recommending its use in patients cases with exposed subchondral bone.  相似文献   

Major bacterial contribution to marine dissolved organic nitrogen   总被引：3，自引：0，他引：3  

MD McCarthy  JI Hedges  R Benner 《Science (New York, N.Y.)》1998,281(5374):231-234

Next to N2 gas, the largest pool of reduced nitrogen in the ocean resides in the enormous reservoir of dissolved organic nitrogen (DON). The chemical identity of most of this material, and the mechanisms by which it is cycled, remain fundamental questions in contemporary oceanography. Amino acid enantiomeric ratios in the high molecular weight fraction of DON from surface and deep water in three ocean basins show substantial enrichment in D enantiomers of four amino acids. The magnitude and pattern of these D/L enrichments indicate that peptidoglycan remnants derived from bacterial cell walls constitute a major source of DON throughout the sea. These observations suggest that structural properties of specific bacterial biopolymers, and the mechanisms for their accumulation, are among the central controls on long-term cycling of dissolved organic nitrogen in the sea.  相似文献   

PIT标记技术在幼鲵标记中的应用研究   总被引：1，自引：0，他引：1  

王启军  赵虎  ＡｎｄｙＫｏｕｂａ  ＳｃｏｔｔＴ．Ｗｉｌｌａｒｄ  张红星  陈玖安 《水生态学杂志》2011,32(2):146-148

对347尾预放流幼鲵的尾部皮下层和肌肉层分别进行横向和纵向PIT标记,通过对标记幼鲵6个月的跟踪观察,共收集到脱落芯片94枚,总脱落率高达27.1%,严重影响标记目的。对植入芯片时的记录进行对比分析,得出尾部皮下层纵向植入法对幼鲵肌体伤害最小,脱落率最低,为3.0%,笔者认为该方法是PIT标记幼鲵的最佳方法。  相似文献   

Implantation of an Uncemented Total Hip Prosthesis Technique and Initial Results of 100 Arthroplasties     

DAVID J. DeYOUNG  DVM  Diplomate ACVS  Diplomate ACVA  BONNIE A. DeYOUNG    HAROLD A. ABERMAN DVM  MSE    ROBERT V. KENNA  DAVID S. HUNGERFORD MD 《Veterinary surgery : VS》1992,21(3):168-177

A porous-coated modular total hip system was developed for uncemented implantation in dogs. The operative technique was developed in cadaver bones and live animals. One hundred uncemented total hip arthroplasties were performed in 92 dogs. Results were successful in 98% of the joints during follow-ups of 3 months or more. Complications included three luxations of the prosthetic joint, two fissure fractures of the femoral cortex, and one complete displacement of the acetabular component from its bony bed. Four complications were resolved successfully.  相似文献   

Esophagitis and esophageal strictures.     

Rance K Sellon  Michael D Willard 《Veterinary Clinics of North America: Small Animal Practice》2003,33(5):945-967

Esophagitis and esophageal strictures are important causes of esophageal disease in dogs and cats. Clinical suspicion is created when the clinician recognizes the clinical signs suggestive of esophageal disease and accounts for historical information and physical examination findings. Once suspected, the diagnosis of esophagitis and esophageal strictures is a fairly simple one in most cases. Although the benefit of diminishing secretion of gastric acid in patients with esophagitis is unquestioned, other questions regarding adjunctive medical treatments, such as sucralfate and glucocorticoids for dogs and cats with esophagitis, have not been answered through appropriate clinical studies. Esophageal strictures are readily treated with balloon dilation or esophageal bougienage, and clients can expect most patients to become functional, although dietary change may be necessary.  相似文献   

VOLUMETRIC IMAGE PROCESSING FOR THREE-DIMENSIONAL DISPLAY OF THE SKELETAL ANATOMY OF THE SEA OTTER     

Michael K.  Stoskopf  DVM  PHD  Elliot K.  Fishman  MD  Thomas D.  Williams  DVM 《Veterinary radiology & ultrasound》1990,31(3):142-145

Volumetrically correct, three-dimensional color images of the sea otter, ( Enhydra lutris ), were generated from computed tomographic (CT) data using a Sun 3/160 workstation and a Pixar Imaging Computer. These images could be displayed as static images (1024×768) or rotated about any axis in real-time by displaying sequential rotation sequences generated by the Pixar Imaging Computer. The images provided realistic depth of field through overshadowing and differential opacification. This was obtained through an opacification algorithm which traced rays from a selected viewing plane through colored gel volumes, and calculated absorbance percentages as a function of the transparency of the gels penetrated. Reconstructions of this type serve as alternative anatomy tutorials for species otherwise unavailable for routine dissection. They also permit topographical studies without interfering with populations of endangered animals.  相似文献