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Oral and Poster Abstracts

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of 101.55±4.94 mmHg. Afterwards the mean arterial pressure<br />

decreased. There was significant increase in the heart rate (80±3 per<br />

minute) at 2 minute of diazepam administration when compared with<br />

the base value of 57 ± 2 beats per minute. There was no appreciable<br />

change in the values of CVP at any stage of observation. The<br />

findings revealed that diazepam is a good muscle relaxant with<br />

minimal cardiopulmonary effects.<br />

Key words: Diazepam, cow calf, heart rate, MAP, CVP<br />

975 Surgical Removal of an Intraocular Malignant Melanoma in a<br />

Romanian Tsigai Ewe<br />

F. Beteg, A. Muste, N. Mates, L. Oana<br />

University of Agricultural Sciences <strong>and</strong> Veterinary Medicine,<br />

Department Surgery, Cluj-Napoca, Romania<br />

Melanomas are common in dogs, cats, <strong>and</strong> horses. They are observed<br />

occasionally as congenital defects in pigs, goats <strong>and</strong> calves.<br />

Melanomas usually are cutaneous neoplasms but can occur wherever<br />

melanocyte clusters are found. Eye <strong>and</strong> mouth are common sites, but<br />

meninges, bone, aorta, etc. are all reported sites. Although tumors<br />

within the globe may or may not be visible, their effect on ocular<br />

function can be dramatic, with visual impairments, discoloration,<br />

discomfort, or a shape changing of the ocular globe <strong>and</strong><br />

exophthalmia. The globe tumors may be small <strong>and</strong> are often not<br />

apparent by the external exams of the enucleated globe. This paper<br />

describes the clinical, surgical <strong>and</strong> histopathological aspects<br />

of intraocular malignant melanoma on a Romanian Tsigai ewe. By<br />

our information <strong>and</strong> knowledge , intraocular melanoma has not been<br />

previously reported in a Romanian Tsigai.Tumoral growing was<br />

observed protruding out of the left eye at a two years old ewe of<br />

Romanian Tsigai. Clinical examination of the tumor was found to be<br />

partial infected <strong>and</strong> to cover the entire ocular surface. The eye was<br />

enucleated, <strong>and</strong> sampled to histopathological exams, <strong>and</strong> diagnosed<br />

as an intraocular malignant melanoma. The surgical removal<br />

by lateral enucleation was successful, because local excision was not<br />

amenable, with no sign of reoccurrence or metastasis nine months<br />

after surgical treatment. The success of the treatment is supposed to<br />

be due to the total removal of the tumor before to the development of<br />

metastasis.<br />

Key words: intraocular, malignant, melanoma, tumor<br />

976 Hemodynamic <strong>and</strong> Hemogasometric Effects of Subarachnoid<br />

Administration of Ropivacaine in Sheep undergoing<br />

Laparotomy<br />

R. Godoy, L. Gouvea, C. Leite, R. Almeida, FH. Ximenes,<br />

L. Gontijo, C. Pereira, R. Ferreira II, JR. Borges, A. Teixeira Neto<br />

Universidade de Brasília, FAV, Brasília-DF Brazi<br />

Objectives of study: The objective of the present study was to evaluate<br />

the sensitive <strong>and</strong> motor block effects of ropivacaine in subarachnoid<br />

space of sheep, also correlating cardiac, respiratory <strong>and</strong><br />

hemogasometric alterations.<br />

Materials <strong>and</strong> methods: Six young healthy sheep weighing<br />

between 47 ± 20 Kg were used. Parameters assessed were heart rate<br />

(HR), respiratory rate (RR), systolic arterial pressure (SAP),<br />

sensitive response (SR) <strong>and</strong> motor response (MR). Arterial blood for<br />

hemogasometric analysis was also collected. The sensitive response<br />

was assessed at time zero <strong>and</strong> after the end of the procedure using a<br />

needle. During the procedure, surgical stimuli was used to test the<br />

sensibility. The HR was assessed using cardiac monitor <strong>and</strong> the SAP<br />

was measured with a non-invasive method. All the parameters were<br />

assessed before the administration of the drug (T0) <strong>and</strong> at 15, 30, 45,<br />

60, 90 <strong>and</strong> 120 minutes after. The spinal needle was introducted on<br />

subarachnoid space between L7 <strong>and</strong> S1 vertebras. The ropivacaine in<br />

the dose of 1,5 mg/Kg <strong>and</strong> volume completed to 10 mL using<br />

distillated water was administred slowly. The head was maintained<br />

higher than the body. About 15 minutes later, the animal was<br />

positioned on its right lateral recumbency <strong>and</strong> the flank laparotomy<br />

started. The parameters were assessed until 120 minutes post<br />

injection <strong>and</strong> after it, the animal was moved to the recovery room<br />

<strong>and</strong> observed until it could st<strong>and</strong> up.<br />

Results: There was no statically significant variation of the parameters<br />

pH, pCO 2, HCO 3, SAP <strong>and</strong> HR. The RR showed difference at times 30<br />

to 60 minutes decreasing from the baseline rate. The blockade was<br />

effective from the tail to the scapular region.<br />

264 XXV. Jubilee World Buiatrics Congress 2008<br />

Conclusions: The experiment showed the hemodynamic stability of<br />

ropivacaine when used through subarachnoid route. The RR<br />

diminution may be attributed to an increased RR at time zero, due to<br />

manipulation stress <strong>and</strong> direct depression of the respiratory center.<br />

The sensitive response was annulled from 15 to 180 minutes after<br />

administration. The motor response, in other h<strong>and</strong>, had a lesslonging<br />

blockade, being present again after 90 minutes. This is a<br />

very interesting characteristic of the drug because it promotes<br />

immediate post operative analgesia, without the inconvenience of<br />

the animal being recumbent. Ropivacaine showed many advantages<br />

over other local anaesthetics when used through subarachnoid route<br />

in sheep.<br />

Support: FINATEC<br />

Key words: anaesthesy, sensitive blockade, motor blockade, flank<br />

laparotomy, ruminant<br />

977 Clinical <strong>and</strong> Radiographic Finding of Lumbar Fracture in a<br />

Four–Year Old Cow<br />

A. Ghadrdan-Mashhadi, A. Ghadiri<br />

Faculty of Veterinary Medicine, Shahid Chamran University,<br />

Department of Clinical Sciences, Ahvaz, Iran<br />

Vertebral fractures are common causes of spinal cord injury in large<br />

animals. Fractures of vertebral column in ruminants may result from<br />

trauma or abnormal bone mineralization. Spontaneous fracture of<br />

vertebrae, that are weakened by developmental defects or spinal<br />

abscesses also common problems in calves. Fractures of the<br />

lumbosacral spine of cattle are commonly caused by slipping in<br />

cemented areas. Many of the spinal fracture occur during mounting<br />

by animals that are exhibiting estral behavior. The clinical signs of<br />

spinal fractures are variable <strong>and</strong> depend on the site of the traumatic<br />

lesion, the severity of the spinal cord compression, <strong>and</strong> the<br />

involvement of specific anatomic tracts. A locally bred non-pregnant<br />

three years old cow was admitted to the veterinary teaching hospital<br />

of Shahid Chamran (Ahvaz) university with a history of difficulty in<br />

rising, progressive weakness of the pelvic limbs <strong>and</strong> ataxia. The<br />

duration of the disease was two months. The animal kept on grass,<br />

straw <strong>and</strong> bran. In clinical examination, the cow was depressed <strong>and</strong><br />

its rectal temperature, heart rate <strong>and</strong> respiratory rate were 39.3 °C,<br />

84/min. <strong>and</strong> 64/min, respectively. On inspection, the lumbar region<br />

was swollen <strong>and</strong> on palpation was painful. Left lateral radiography<br />

was performed. Grid was not used <strong>and</strong> the exposure factors were<br />

70KVP <strong>and</strong> 25mAs. There was a shortening of fourth lumbar<br />

vertebra with a chip fracture in the ventral part of the body of it.<br />

According to clinical <strong>and</strong> radiographic finding, spinal cord<br />

compression was diagnosed <strong>and</strong> because the treatment of this disease<br />

in farm animal is usually not possible, slaughter recommended.<br />

978 Calf Umbilical Disease: Ultrasound Approach. Field<br />

Experience<br />

G. Gnemmi, C. Maraboli<br />

BOVINEVET, Italy<br />

Aims: The umbilical calf pathologies are a frustrate diagnosis for the<br />

veterinary clinician: the size of the calf <strong>and</strong> the abdomen tension,<br />

often don’t permit an easy palpation of the umbilicus area,<br />

consequently the diagnosis of each umbilical tumefaction may be<br />

mistake, also by an experienced clinician. Aim of this trial was to<br />

analyze the possible use of an ultrasound unit, normally used in<br />

bovine reproduction, for the diagnosis of calf umbilical diseases, in<br />

field condition.<br />

Material <strong>and</strong> Methods: The trial has been done during the period Jan.<br />

2000-Dec. 2007 <strong>and</strong> it included 206 cases, in 35 farms. We had: 80<br />

urachal abscess, 12 pervious uracho, 66 hernias (28 complicated), 48<br />

umbelical vein abscess. The ultrasound examination was performed<br />

using a 5-7.5 MHz linear probe (Agroscan ® ECM France) <strong>and</strong> a 5 MHz<br />

sector probe (L 14 ® ECM France).The area from the sternum to the<br />

udder was clipped from the hair <strong>and</strong> a good quality ultrasound gel was<br />

applied to the skin area.The calves were scanned in st<strong>and</strong>ing position,in<br />

dorsal <strong>and</strong> in left lateral recumbency.<br />

Results: Umbilical hernia: has been possible to see if a complicated<br />

hernia was incarcerated with abomasal or intestinal h<strong>and</strong>le. Urachal<br />

abscess: has been possible to see the size of the abscess: the abscess<br />

will appear as granular echoic material inside a dark space (fluid),<br />

surrounded by a echoic wall, positioned from the apex of the bladder

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