Effetto analgesico della somministrazione in infusione continua di lidocaina cloridrato nella chirurgia perineale del cane

Aim of the study was to evaluate the pre-emptive analgesic effect obtained by systemic continuous infusion of lidocaine (LID) in comparison with those obtained by systemic continuous infusion of fentanyl (FEN) during and after canine perineal surgery. Twelve male dogs undergoing perineal surgery were preanaesthetised with acepromazine (0.03 mg kg-1 IM), induced with propofol (4-6 mg kg-1 IV), and maintained with isoflurane in 100% oxygen. Fifteen minutes before perineal surgery, perineal herniorrhaphy or adenoma ( 8 3-5 cm) excission, all the animals were randomly assigned to receive a bolus followed by a systemic continuous infusion: lidocaine (1 mg kg-1 IV + 0.05 mg kg-1min-1 IV) in LID group(n=6) or fentanyl (5 mcg kg-1 IV + 0.05 mcg kg-1min-1 IV) in FEN group (n=6). Subjective pain score system, modified by Smith, was used for evaluation of pain at 0.5, 1, 2, 3, 4, 8, 16, and 24 hours after extubation (T0). All dogs showing pain score 65 9 (maximum=24) were treated with a rescue analgesic drug (buprenorphine 10 mcg kg-1 ) and excluded from further analysis. Physiological parameters during anaesthesia (HR, RR, NIBP, T\ub0, SpO2, ETCO2, ECG) and differences in pain scores in groups were analyzed using ANOVA, t test (P<0.05) and Wilcoxon\u2019s rank-sum test. Results: there was a significantly higher incidence of treatment failure in FEN group (83,3%) than in LID group (0%). After four hours, post-operative pain scores in LID group were significantly lower than those in FEN group. Monitored parameters during anaesthesia did not show significant differences between groups. Systemic intra-operative lidocaine provides better analgesia than fentanyl in canine post-perineal surgery, involving its potential role in pre-emptive and post-operative analgesia

The family Donacidae (Bivalvia: Tellinoidea) in Thai waters

The species belonging to the family Donacidae living in Thailand waters are herein revised. After an exhaustive bibliographical search, 29 nominal species were found from this area. Materials from several institutions and specimens collected during fieldwork in Phuket and the Gulf of Thailand were studied. All the type materials were illustrated and redescribed. Details of the type localities, repositories, habitats and biogeographical distribution are discussed. In addition, some collected specimens and the type materials of the valid species and synonyms are illustrated. Currently, eight valid species are confirmed as living in Thailand waters: Donax (Deltachion) spinosus Gmelin, 1791, Donax (Deltachion) semigranosus (Dunker, 1877), Donax (Dentilatona) incarnatus Gmelin, 1791, Donax (Hecuba) scortum (Linnaeus, 1758), Donax (Latona) cuneatus Linnaeus, 1758, Donax (Latona) faba Gmelin, 1791, Donax (Latona) solidus Spengler, 1798 and Donax (Paraserrula) introradiatus Reeve, 1855. The presence of Donax (Deltachion) semisulcatus Hanley, 1843, Donax brazieri Smith, 1892, Donax (Tentidonax) veruinus Hedely, 1913 and Donax victoris Fischer-Piette, 1942 in Thailand waters remains uncertain. These species have been reported in the study area in the literature, but they were not sampled during this study.Fil: Signorelli, Javier Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; ArgentinaFil: Printrakoon, Cheewarat. Kasetsart University; Tailandi

Search for the supersymmetric partner of the top quark in pp\u304 collisions at 1as=1.8 TeV

We report on a search for the supersymmetric partner of the top quark (top squark) produced in tt\u304 events using 110 pb-1 of pp\u304 collisions at 1as = 1.8 TeV recorded with the Collider Detector at Fermilab. In the case of a light top squark, the decay of the top quark into a top squark plus the lightest supersymmetric particle (LSP) could have a significant branching ratio. The observed events are consistent with standard model tt\u304 production and decay. Hence, we set limits on the branching ratio of the top quark decaying into a top squark plus LSP, excluding branching ratios above 45% for a LSP mass up to 40 GeV/c2