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Cardiovascular effects of desflurane after acute hemorrhage in dogs
In this study, a team from Brazilia examined the cardiovascular effects of desflurane following acute hemorrhage in an experimental study of eight mixed breed dogs. The results are very interesting...

Hemorrhage was induced by withdrawal of blood until mean arterial pressure (MAP) dropped to 60 mmHg in conscious dogs. Blood pressure was maintained at 60 mmHg for 1 hour by further removal or replacement of blood. Desflurane was delivered by facemask until endotracheal intubation could be performed and a desflurane expiratory end-tidal concentration of 10.5 V% was maintained.

Systolic, diastolic, and mean arterial blood pressure (SAP, DAP and MAP), central venous pressure (CVP), cardiac output (CO), stroke volume (SV), cardiac index (CI), systemic vascular resistance (SVR), heart rate (HR), respiratory rate (RR), partial pressure of carbon dioxide in arterial blood (PaCO2), and arterial pH were recorded before and 60 minutes after hemorrhage, and 5, 15, 30, 45 and 60 minutes after intubation.

Sixty minutes after hemorrhage, SAP, DAP, MAP, CVP, CO, CI, SV, PaCO2, and arterial pH decreased, and HR and RR increased when compared with baselines values. Immediately after intubation, MAP and arterial pH decreased, and PaCO2 increased. Fifteen minutes after intubation SAP, DAP, MAP, arterial pH, and SVR decreased. At 30 and 45 minutes, MAP and DAP remained decreased and PaCO2 increased, compared with values measured after hemorrhage. Arterial pH increased after 30 minutes of desflurane administration compared with values measured 5 minutes after intubation.

Desflurane induced significant changes in blood pressure and arterial pH when administered to dogs following acute hemorrhage.

Source: Santos, Paulo S.P., Andrade, James N.B.M., Selmi, André L., Costa, Jorge L.O., Faleiros, Rafael R., Nunes, Newton (2003): Cardiovascular effects of desflurane following acute hemorrhage in dogs. In: Journal of Veterinary Emergency and Critical Care 13 (1), 7-12.




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SMALL ANIMAL PRACTICE

Radioactive iodine uptake in hyperthyroid cats after rh-TSHmembers
Radioactive iodine therapy is considered the treatment of choice for hyperthyroidism in cats, but the availability of this modality is limited by costs and hospitalization requirements. Administration of recombinant human thyroid stimulating hormone (rh‐TSH) to humans with thyroid neoplasia or nodular goiter can increase thyroidal iodine uptake, thereby allowing the use of lower radioactive iodine doses for treatment. Veterinary studies of this subject are limited, and results are conflicting. Thus, the objective of this study was to investigate the effects of rh‐TSH administration on thyroidal iodine uptake in hyperthyroid cats.

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