AI Article Synopsis
- Six healthy rabbits were given varying doses of intramuscular alfaxalone (1mg/kg, 2.5mg/kg, and 5mg/kg) to study its sedative and physiological effects, with observations made after a 7-day rest period.
- The study measured sedative effects using a scoring system and monitored vital signs like pulse, respiratory rate, and blood pressure before and after administration.
- Results showed that higher doses of alfaxalone resulted in quicker and longer-lasting sedation, with the 2.5 mg/kg and 5 mg/kg doses leading to complete loss of righting reflex in all rabbits, while no significant circulatory depression or apnea was observed.
Article Abstract
To evaluate sedative and physiological effects of low dose intramuscular (IM) alfaxalone, six healthy rabbits were administered single IM doses of alfaxalone at 1mg/kg (IM1), 2.5 mg/kg (IM2.5), or 5 mg/kg (IM5) with a minimum of 7-day washout period. Sedative effects were subjectively evaluated using a composite measure scoring system (maximum sedation score of 16) and pulse rate, respiratory rate, non-invasive blood pressure, and percutaneous oxygen-hemoglobin saturation were measured before and after IM alfaxalone. Loss of righting reflex (LRR) was achieved in all rabbits after IM2.5 and IM5 treatments but in only three rabbits after IM1 treatment. Median (interquartile range) times to LRR were 16 min (15-17), 6 min (6-6), and 4 min (4-4), and median durations of LRR were 0.5 min (0-7), 22.5 min (19-27), and 53 min (48-58) after IM1, IM2.5, and IM5 treatments, respectively. The duration of LRR after IM5 treatment was significantly longer than those after IM1and IM2.5 treatments (P<0.01). Median value of total sedation scores peaked at 10 min [score 3.5 (3-4)], from 10 min [score 13.5 (12-14)] to 15 min [score 13.5 (12-14)], and from 10 min [score 15 (12-15)] to 15 min [score 15 (14-15)] after IM1, IM2.5, and IM5 treatments, respectively. No rabbit showed circulatory depression and apnea although respiratory rate decreased after IM 2.5 and IM5 treatments. In conclusion, alfaxalone produced a dose-dependent sedative effect and a deep sedation was achieved by alfaxalone at 2.5 mg/kg IM in rabbits.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6612508 | PMC |
| http://dx.doi.org/10.1292/jvms.18-0618 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Electroencephalogram-Guided General Anesthesia in a Pediatric Patient With Alexander's Disease: A Case Report.
A A Pract
January 2025
From the Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Palo Alto, California.
In this case, the electroencephalogram (EEG) was used to guide anesthesia care for a pediatric patient with Alexander's Disease undergoing serial intrathecal injections. Previous procedures using a standard maintenance propofol dose of up to 225 µg/kg/min led to postanesthetic recovery times of over 6 hours, requiring a neurology consult for noncoherence. The EEG assisted in guiding maintenance propofol dosing to 75 µg/kg/min, decreasing postanesthetic wash-off and postanesthesia care unit (PACU) recovery time by 50%.
View Article and Find Full Text PDFValidation of a method for estimating pulmonary dead space in ventilated beagles to correct exhaled propofol concentration in mixed air.
BMC Vet Res
January 2025
Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China.
Background: Mixed exhaled air has been widely used to determine exhaled propofol concentrations with online analyzers, but changes in dead space proportions may lead to inaccurate assessments of critical drug concentration data. This study proposes a method to correct propofol concentration in mixed air by estimating pulmonary dead space through reconstructing volumetric capnography (Vcap) from time-CO and time-volume curves, validated with vacuum ultraviolet time-of-flight mass spectrometry (VUV-TOF MS).
Methods: Existing monitoring parameters, including time-volume and time-CO curves, were used to determine Vcap.
The Improvement in Sleep Quality by Zizyphi Semen in Rodent Models Through GABAergic Transmission Regulation.
Nutrients
December 2024
Department of Molecular Medicine, School of Medicine, Ewha Womans University, Seoul 07804, Republic of Korea.
: Sleep, a process physiologically vital for mental health, faces disruptions in various sleep disorders linked to metabolic and neurodegenerative risks. seed (Zizy) has long been recognized for its diverse pharmacological attributes, including analgesic, sedative, insomnia, and anxiety alleviation. : In this study, the sleep-prolonging effects of Zizy extract (100, 200 mg/kg), along with their characterizing compounds jujuboside A (JuA) (5, 10 mg/kg), were evaluated in a mouse model under a pentobarbital-induced sleep.
View Article and Find Full Text PDFA comparative study of detomidine delivery via intranasal or intramuscular routes in calves undergoing disbudding.
Vet Anaesth Analg
January 2025
Department of Surgery, Faculty of Veterinary Medicine, Burdur Mehmet Akif Ersoy University, Burdur, Turkey.
Objective: To compare the sedative and physiological effects of intranasal (IN) and intramuscular (IM) delivery of detomidine in calves.
Study Design: Prospective, randomized experimental study.
Animals: A total of 20 healthy calves, aged 15.
Effect of Co-Administration of Midazolam and Dexmedetomidine on Haemodynamics and Stress Response in Elderly Patients with Non-Small Cell Lung Cancer.
J Invest Surg
December 2025
Department of Anesthesiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.
Objective: This study aimed to evaluate the effect of co-administration of midazolam and dexmedetomidine on hemodynamics and stress response in elderly patients with non-small cell lung cancer (NSCLC).
Methods: In this prospective, randomized controlled trial, 154 elderly NSCLC patients scheduled for lobectomy in our oncology department from January 2019 to December 2021 were recruited. Patients were randomized 1:1 to receive either dexmedetomidine (control group) or dexmedetomidine plus midazolam (study group) for anesthesia during lobectomy the random number table method, with 77 patients in each group.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!