Cardiorespiratory Effects of the Intravenous Administration of Tiletamine-zolazepam to Cats   总被引：2，自引：0，他引：2  

PETER HELLYER dvm  WILLIAM W. MUIR III dvm  PhD  Diplomateacva  JOHN A. E. HUBBELL dvm  ms  Diplomateacva JAN SALLY bs  ms 《Veterinary surgery : VS》1988,17(2):105-110

The hemodynamic and respiratory effects of three doses (9.7, 15.8, and 23.7 mg/kg intravenous [IV]) of a 1:1 combination of tiletamine and zolazepam were studied after isoflurane anesthesia in cats instrumented for the recording of hemodynamic data. Systolic, mean, and diastolic arterial blood pressures were decreased 1 minute after drug administration but then increased above baseline with all three doses. Cardiac output was decreased briefly at 1 minute with the 15.8 and 23.7 mg/kg doses. The rate of development of left ventricular pressure and peripheral vascular resistance decreased at 1 minute but returned to baseline or above by 10 minutes. There were no significant changes in heart rate, central venous pressure, or left ventricular end diastolic pressure. The arterial pH and blood gas measurements reflected the development of respiratory acidosis after administration of 23.7 mg/kg. These results support the conclusions that tiletamine-zolazepam administered intravenously is a useful and comparatively safe anesthetic agent in the cat.  相似文献   

Holding Power of Threaded External Skeletal Fixation Pins in the Near and Far Cortices of Cadaveric Canine Tibiae     

DARRYL E. MCDONALD DVM  MS    ROSS H. PALMER DVM  MS  Diplomate ACVS    DONALD A. HULSE DVM  Diplomate ACVS    JOSEPH S. NEIGUT MS    WILLIAM A. HYMAN MS  ScD  MARGARET R. SLATER DVM  PhD 《Veterinary surgery : VS》1994,23(6):488-493

We compared the pin-bone interfaces at the near and far cortical penetration sites of positive-profile end-threaded external fixation pins in cadaveric canine tibiae. The holding power of the pins in each cortical surface was independently measured in 21 pin-bone sections. Scanning electron microscopy (SEM) was used to compare subjectively the microstructural appearance of the pin-bone interfaces at the near and far cortical penetration sites in eight pin-bone sections. The far cortical penetration site provided greater holding power than did the near cortical site. SEM evaluation suggested more bony microfractures and debris with less pin-bone interlock in the near cortical penetration sites than in the corresponding far cortical penetration sites. This study showed that after low-speed power insertion of positive-profile end-threaded pins in canine cadaveric tibiae, the near cortical penetration site contributes approximately 25% less to the overall holding power of the pin than does the far cortical penetration site.  相似文献   

Urinary Bladder Incisions in Dogs Comparison of Ventral and Dorsal     

JOSEPH P. DESCH II dvm  ms  STANLEY D. WAGNER dvm  ms 《Veterinary surgery : VS》1986,15(2):153-155

The occurrence of postoperative adhesions following ventral (20 dogs) or dorsal (12 dogs) urinary bladder incisions was evaluated. The bladder incisions were sutured with 3–0 polydioxanone suture material in a two-layer closure. Laparotomy (no urinary bladder incision) was performed in four dogs, which served as controls. The surgical sites were examined 1 (30 dogs) and 2 weeks (6 dogs) after surgery. Omental adherence to the urinary bladder was a frequent finding, but none of the urinary bladders was adhered to the ventral abdominal wall incision.  相似文献   

Subtotal Colectomy With Surgical Stapling Instruments Via a Trans-cecal Approach for Treatment of Acquired Megacolon in Cats     

MICHELE KUDISCH ms  dvm  MICHAEL M. PAVLETIC dvm  diplomate acvs 《Veterinary surgery : VS》1993,22(6):457-463

Surgical stapling equipment was used to perform an end-to-end colonic anastomosis in 15 cats for the treatment of acquired megacolon. An end-to-end stapling device was passed to the anastomotic site by a trans-cecal approach. Subsequent closure of the cecal incision was accomplished with a thoracoabdominal stapling device. Two cats had hemorrhagic episodes immediately after surgery that required blood transfusions. All 15 cats have had good to excellent health after subtotal colectomy and colocolostomy performed using this stapling technique. Results of this study have demonstrated that "single surgical field" placement of the end-to-end stapling device has the primary advantage of simplicity and a lower chance of contamination compared with (dual field) rectal passage of similar devices. Closure of the cecal access incision is easily performed without reducing the diameter of the large intestinal lumen. The stapling technique provided an efficient and consistent method for anastomosis of the large bowel in cats.  相似文献   

Noninvasive Technique for Reduction of Zygomatic Process Fractures in the Horse     

J. T. BLACKFORD dvm  ms  D. V. HANSELKA dvm  ms  DiplomateACVS  J. M. HEITMANN dvm  ms C. L. BOYD dvm  ms 《Veterinary surgery : VS》1985,14(1):21-26

Zygomatic (supraorbital) process fracture of the horse is a common injury; if untreated, permanent injury to the eye or an undesirable cosmetic appearance may result. A noninvasive surgical reduction technique is described that requires minimal instrumentation and can easily be performed in a surgical facility or under field conditions. This technique has resulted in successful reduction and healing in 12 of 13 cases of zygomatic process fractures.  相似文献   

Video‐Assisted Thoracoscopic Resection of Noninvasive Thymomas Using One‐Lung Ventilation in Two Dogs     

PHILIPP D. MAYHEW BVM&S  Diplomate ACVS  JOSEPH S. FRIEDBERG MD  FACS 《Veterinary surgery : VS》2008,37(8):756-762

Objective— To report the technique and outcome of video‐assisted thoracoscopic surgery (VATS) for resection of cranial mediastinal thymoma in 2 dogs. Study Design— Case report. Animals— Eleven‐year‐old Labrador Retrievers (n=2). Methods— Two dogs had VATS resection of thymoma. Preoperative computed tomography (CT) scans revealed well‐circumscribed cranial mediastinal masses with dimensions of 4.5 cm × 4.2 cm × 3.7 cm and 2.1 cm × 2.1 cm × 4.1 cm (at the time of resection) without CT evidence of vascular invasion. One‐lung ventilation (OLV) was achieved using a bronchoscopically placed double‐lumen endobronchial tube. A 3‐portal technique was used for VATS access to the thorax. Thymomas were dissected from the tissues of the cranial mediastinum with the aid of a harmonic scalpel and retrieved in specimen retrieval bags. Results— Two cranial mediastinal thymomas were resected successfully, with their capsules intact, using a VATS technique. One dog developed aspiration pneumonia postoperatively which resolved with treatment and remains healthy 18 months postoperatively with no radiographic evidence of tumor recurrence. The second dog was diagnosed with myasthenia gravis, megaesophagus, and aspiration pneumonia preoperatively and despite recovering well from the procedure had a second episode of aspiration pneumonia 5 days postoperatively and was euthanatized. Conclusions— VATS resection of modestly sized noninvasive thymoma is possible in dogs. Careful case selection and preoperative imaging are the keys. Clinical Relevance— Thoracoscopic resection of modestly sized mediastinal masses forms part of an increasingly expansive set of indications for minimally invasive surgery in select veterinary patients.  相似文献   

富含磁性铁纳米颗粒的生物炭对菌根侵染、植物生长、营养吸收及土壤质量改善的影响   总被引：2，自引：0，他引：2  

S.JOSEPH  H. M. ANAWAR  P. STORER  P. BLACKWELL  C. CHIA  Y. LIN  P. MUNROE  S. DONNE  J. HORVAT  J. L. WANG  Z. M. SOLAIMAN 《土壤圈》2015,25(5):749-760

At present, there is little commercial sale of biochar, since farmers find they can not gain a return on their investment in this amendment in the first few years after its application, because of the high cost associated with large application rates. To overcome this constraint, development of artificially aged enriched biochar-mineral complexes (BMCs), having a higher mineral content, surface functionality, exchangeable cations, high concentration of magnetic iron (Fe) nanoparticles, and higher water-extractable organic compounds has been undertaken by a combined team of researchers and a commercial company.~% Two biochars produced under different pyrolysis conditions were activated with a phosphoric acid treatment. A mixture of clay, chicken litter, and minerals were added to the biochar, and then this composite was torrefied at either 180 or 220 $^\circ$C. In this study a pot experiment was carried out in glasshouse conditions to determine the effects of four different BMCs, with different formulations applied at rates of 100 and 200 kg ha$^{-1}$, on the mycorrhizal colonisation, wheat growth and nutrient uptake, and soil quality improvement. It was found that the phosphorus (P) and nitrogen uptake in wheat shoots were significantly greater for a low application rate of BMCs (100 kg ha$^{-1}$).~The present formulation of BMC was effective in enhancing growth of wheat at low application rate (100 kg ha$^{-1}$).~The increase in growth appeared due to an increase in P uptake in the plants that could be partly attributed to an increase in mycorrhizal colonisation and partly due to the properties of the BMC.  相似文献   

Ocean scale hypoxia‐based habitat compression of Atlantic istiophorid billfishes     

ERIC D. PRINCE  JIANGANG LUO  C. PHILLIP GOODYEAR  JOHN P. HOOLIHAN  DERKE SNODGRASS  ERIC S. ORBESEN  JOSEPH E. SERAFY  MAURICIO ORTIZ  MICHAEL J. SCHIRRIPA 《Fisheries Oceanography》2010,19(6):448-462

Oxygen minimum zones (OMZs) below near‐surface optimums in the eastern tropical seas are among the largest contiguous areas of naturally occurring hypoxia in the world oceans, and are predicted to expand and shoal with global warming. In the eastern tropical Pacific (ETP), the surface mixed layer is defined by a shallow thermocline above a barrier of cold hypoxic water, where dissolved oxygen levels are ≤3.5 mL L^?1. This thermocline (～25–50 m) constitutes a lower hypoxic habitat boundary for high oxygen demand tropical pelagic billfish and tunas (i.e., habitat compression). To evaluate similar oceanographic conditions found in the eastern tropical Atlantic (ETA), we compared vertical habitat use of 32 sailfish (Istiophorus platypterus) and 47 blue marlin (Makaira nigricans) monitored with pop‐up satellite archival tags in the ETA and western North Atlantic (WNA). Both species spent significantly greater proportions of their time in near‐surface waters when inside the ETA than when in the WNA. We contend that the near‐surface density of billfish and tunas increases as a consequence of the ETA OMZ, therefore increasing their vulnerability to overexploitation by surface gears. Because the ETA OMZ encompasses nearly all Atlantic equatorial waters, the potential impacts of overexploitation are a concern. Considering the obvious differences in catchability inside and outside the compression zones, it seems essential to standardize these catch rates separately to minimize inaccuracies in stock assessments for these species. This is especially true in light of global warming, which will likely exacerbate future compression impacts.  相似文献   

A Two-Sector Cross-Section Econometric Model of the 1970 Housing Stock     

JOSEPH RABIANSKI  JOHN SPITZER 《Growth and change》1978,9(2):2-8

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利用选择导入系进行水稻耐低磷鉴定与QTL定位分析     

任洁  赵秀琴  丁在松  项超  张晶  王超  张俊巍  张强  庞昀龙  高用明  石英尧 《中国水稻科学》2015,29(1):1-13

选取我国当前生产上大面积推广应用的籼稻恢复系明恢86和蜀恢527作为轮回亲本,以籼稻品种爷驼崽为供体亲本构建了2个BC2F4群体,在河北廊坊田间正常土壤正常施肥(对照)、贫瘠土壤正常施肥和贫瘠土壤低磷胁迫这三种处理下进行产量及相关性状的表型评价。同时,在北京温室采用水培法进行苗期耐低磷鉴定。在廊坊检测到49个产量及相关性状主效QTL,这些QTL对表型变异的贡献率为6.7%~16.5%;其中有25个(51.0%)QTL的有利等位基因来自供体亲本爷驼崽。在北京检测到影响耐低磷相关性状(根长、根系干质量、根冠比、地上部分干质量和总干质量)的主效QTL 48个,这些QTL对表型变异的贡献率为7.7%~16.6%;其中有21个(43.8%)QTL的有利等位基因来自供体亲本爷驼崽。多达79.6%的QTL能在廊坊环境两个或两个以上处理下被检测到,特别是与每穗总粒数、结实率和千粒重有关的QTL,不仅能稳定的表达,并且它们在不同处理下具有比较一致的效应。在检测到的所有QTL中,有8个染色体区段在两种环境的低磷胁迫条件下被同时检测到,其中与第12染色体RM511(Bin12.4)紧密连锁的位点,同时控制每穗实粒数、每穗总粒数、根长、根系干质量、地上部分干质量和总干质量等6个性状。  相似文献