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Total intravenous anesthesia with propofol, ketamine, and lidocaine associated with dexmedetomidine or xylazine for ovariohysterectomy surgery in female dogs

Authors :
Gustavo Antônio Boff
Camila Moura de Lima
Luã Borges Iepsen
Márcia de Oliveira Nobre
Martielo Ivan Gehrcke
Source :
Ciência Rural, Vol 54, Iss 6 (2023)
Publication Year :
2023
Publisher :
Universidade Federal de Santa Maria, 2023.

Abstract

ABSTRACT: This study compared cardiovascular and respiratory effects of dexmedetomidine and xylazine in total intravenous anesthesia with propofol, ketamine, and lidocaine. Twenty-one female dogs were submitted to ovariohysterectomy, premedicated with acepromazine and anesthetized with propofol at a variable rate. The dogs were intubated and supplemented with 100% oxygen in a circuit without rebreathing gases in spontaneous ventilation. They were divided into three groups (n=21) after induction: control (CON) with ketamine (2 mg/kg + 0.6 mg/kg/h) and lidocaine (2 mg/kg + 3 mg/kg/h), DEX and XIL with the same drugs as CON, associated with dexmedetomidine (2 µg/kg + 1 µg/kg/h) or xylazine (0.2 mg/kg + 0.1 mg/kg/h). Propofol consumption, fentanyl analgesic rescue, and cardiorespiratory and blood gas parameters were evaluated during anesthesia. The DEX group had a lower consumption of propofol (0.16 ± 0.09 mg/kg/min) compared to CON (0.24 ± 0.09 mg/kg/min), both not differing from XIL (0.23 ± 0.09 mg/kg/min). The mean arterial pressure was higher after the initial bolus in DEX (107 ± 8 mmHg) and XIL (96 ± 11 mmHg) compared to the CON group (80 ± 10 mmHg). Higher accumulation of arterial carbon dioxide and a decrease in pH were observed in the CON group. The total number of fentanyl rescues did not differ between DEX (7) and XIL (6) and were lower than CON (16). Therefore, dexmedetomidine and xylazine reduced intraoperative fentanyl consumption compared to ketamine and lidocaine infusion alone. However, only dexmedetomidine promoted lower propofol consumption and higher blood pressure values.

Details

Language :
English, Portuguese
ISSN :
16784596 and 01038478
Volume :
54
Issue :
6
Database :
Directory of Open Access Journals
Journal :
Ciência Rural
Publication Type :
Academic Journal
Accession number :
edsdoj.bbab0fb69ac497eb845c3e1e073704e
Document Type :
article
Full Text :
https://doi.org/10.1590/0103-8478cr20220323