Transesophageal monitoring of aortic blood flow during nonemergent canine surgeries     

Piper L. Wall  DVM  PhD  DACVECC  ; Maisha M. Rudison  BS  ; Tatjana Lazic  DVM  Dean H. Reidesel  DVM  PhD 《Journal of Veterinary Emergency and Critical Care》2002,12(1):1-8

Objective: To establish baseline values for descending thoracic aortic blood flow parameters as determined with a transesophageal combined M‐mode and pulsed Doppler ultrasound‐based monitoring method. Design: Preliminary observational study. Setting: University small animal teaching hospital. Animals: The study population consisted of anesthetized canine patients undergoing nonemergent surgeries. Prospectively set criteria for inclusion were adequate body size for placement of the esophageal probe and a nonemergent reason for surgery. The criterion for exclusion was recent trauma. Interventions: Placement of the transesophageal probe. Measurements and main results: Data was collected during 15 surgeries. Data from three dogs was excluded from data analysis (two recently hit by motor vehicles, one recently having undergone a total hip replacement). Each parameter was stable across time within each individual dog. The ranges of the descending thoracic aortic parameters across the 12 nonemergent cases were as follows: blood flow, 0.038–0.085 L min^?1 kg^?1; blood flow per beat, 0.31–0.84 mL kg^?1; blood acceleration, 6–29 m s^2?1; blood peak velocity, 38–105 m s^?1; left ventricular ejection time interval 331–492 ms; and diameter, 0.30–0.93 mm kg^?1. Conclusions: The range of descending thoracic aortic blood flow parameters encountered in this small group of dogs during nonemergent surgeries was broad; however, each parameter was quite stable across time with little change occurring in any dog during monitoring.  相似文献   

Minimum duration of effective head-only electrical stunning of fallow deer (Dama dama) and time to loss of consciousness following a throat-cut     

Cook CJ  Gilbert KV  Devine CE  Dean JM  Hogg B 《New Zealand veterinary journal》1994,42(4):156-157

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Factors that affect equine wound repair.     

Dean Hendrickson  Joanna Virgin 《Veterinary Clinics of North America: Equine Practice》2005,21(1):33-44

The rate and outcome of wound healing are determined by many factors,some of which are already in effect when the horse is first presented to the veterinarian. A thorough understanding of wound healing principles,coupled with clear client communication, should enable the practitioner to minimize the number of additional factors that may exacerbate the initial situation.  相似文献   

Quantifying patch distribution at multiple spatial scales: Applications to wildlife-habitat models     

Johnson  Chris J.  Boyce  Mark S.  Mulders  Robert  Gunn  Anne  Gau  Rob J.  Cluff  H. Dean  Case  Ray L. 《Landscape Ecology》2004,19(8):869-882

Multiscale analyses are widely employed for wildlife-habitat studies. In most cases, however, each scale is considered discrete and little emphasis is placed on incorporating or measuring the responses of wildlife to resources across multiple scales. We modeled the responses of three Arctic wildlife species to vegetative resources distributed at two spatial scales: patches and collections of patches aggregated across a regional area. We defined a patch as a single or homogeneous collection of pixels representing 1 of 10 unique vegetation types. We employed a spatial pattern technique, three-term local quadrat variance, to quantify the distribution of patches at a larger regional scale. We used the distance at which the variance for each of 10 vegetation types peaked to define a moving window for calculating the density of patches. When measures of vegetation patch and density were applied to resource selection functions, the most parsimonious models for wolves and grizzly bears included covariates recorded at both scales. Seasonal resource selection by caribou was best described using a model consisting of only regional scale covariates. Our results suggest that for some species and environments simple patch-scale models may not capture the full range of spatial variation in resources to which wildlife may respond. For mobile animals that range across heterogeneous areas we recommend selection models that integrate resources occurring at a number of spatial scales. Patch density is a simple technique for representing such higher-order spatial patterns.  相似文献   

First report of ramorum dieback (Phytophthora ramorum) on Hamamelis virginiana in the UK     

P. M. Giltrap  A. J. Inman  V. C. Barton  A. V. Barnes  C. R. Lane  K. J. D. Hughes  J. Tomlinson  M. L. Dean  K. Izzard 《Plant pathology》2004,53(4):526-526

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Pancarpal and partial carpal arthrodesis with 3 locking compression plates in 6 horses          下载免费PDF全文

Alexandra L. Curtiss VMD  Laurie R. Goodrich DVM  PhD  DACVS  Fabrice Rossignol DMV  DECVS  Dean W. Richardson DVM  DACVS 《Veterinary surgery : VS》2018,47(5):692-704

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保定市一亩泉河河流中COD的变化及污染源分析     

班西雨  杜忠文  王世杰  王建伟  田祖光 《绿色科技》2020,(4):27-29

针对保定市城区水系管理委员会2017年3月公布的黑臭水体河流中的一亩泉河7.23km的黑臭水体段为参考进行了勘查、取样与COD实验工作,从2019年4月12日到2019年5月29日进行了为期一个半月的时间。研究结果表明:保定市一亩泉河河流不同位置COD大小不同、污染原因不同。通过周围景观的变化、对采样点附近居民进行的走访和COD浓度的测定,对一亩泉河的水质状况和污染源进行了全面系统地分析。并为此提出了切实可行、经济有效、便于管理的控制方案。  相似文献   

Equine influenza vaccination in the UK: Current practices may leave horses with suboptimal immunity     

Amie Wilson  Gina Pinchbeck  Rachel Dean  Catherine McGowan 《Equine veterinary journal》2021,53(5):1004-1014

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INVITED REVIEW—IMAGE REGISTRATION IN VETERINARY RADIATION ONCOLOGY: INDICATIONS,IMPLICATIONS, AND FUTURE ADVANCES          下载免费PDF全文

Yang Feng  Jessica Lawrence  Kun Cheng  Dean Montgomery  Lisa Forrest  Duncan B. Mclaren  Stephen McLaughlin  David J. Argyle  William H. Nailon 《Veterinary radiology & ultrasound》2016,57(2):113-123

The field of veterinary radiation therapy (RT) has gained substantial momentum in recent decades with significant advances in conformal treatment planning, image‐guided radiation therapy (IGRT), and intensity‐modulated (IMRT) techniques. At the root of these advancements lie improvements in tumor imaging, image alignment (registration), target volume delineation, and identification of critical structures. Image registration has been widely used to combine information from multimodality images such as computerized tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET) to improve the accuracy of radiation delivery and reliably identify tumor‐bearing areas. Many different techniques have been applied in image registration. This review provides an overview of medical image registration in RT and its applications in veterinary oncology. A summary of the most commonly used approaches in human and veterinary medicine is presented along with their current use in IGRT and adaptive radiation therapy (ART). It is important to realize that registration does not guarantee that target volumes, such as the gross tumor volume (GTV), are correctly identified on the image being registered, as limitations unique to registration algorithms exist. Research involving novel registration frameworks for automatic segmentation of tumor volumes is ongoing and comparative oncology programs offer a unique opportunity to test the efficacy of proposed algorithms.  相似文献   

Influences of Sex and Age on the Hematological Profile of the Jundiá (Silver Catfish) Rhamdia quelen     

Nivaldo Ferreira do Nascimento  Laura Satiko Okada Nakaghi  Cleonice Cristina Hilbig  Arlene Sobrinho Ventura  Ana Carolina Barni de Azevedo  Andressa Fierli Dean 《Journal of aquatic animal health》2016,28(3):161-165

In this study, sex and age influenced the hematological profiles of Jundiá (Silver Catfish) Rhamdia quelen. Females showed lower levels of hemoglobin, young fish increased lymphocyte counts, and older fish increased hematocrit values. These results indicate that, depending on age and sex, the fish have disparate hematological profiles. For this reason, it is important to consider the sex and age of an R. quelen when examining the impact of environmental and management factors on this species in terms of their hematological profiles.

Received May 24, 2015; accepted March 24, 2016 Published online August 2, 2016  相似文献