Electroencephalographic and electromyographic changes during the use of detomidine and detomidine-butorphanol combination in standing horses

2006 ◽  
Vol 54 (1) ◽  
pp. 35-42 ◽  
Author(s):  
P. Kruljc ◽  
Alenka Nemec
Keyword(s):  
Brain Activity ◽  
Muscle Relaxation ◽  
Brain Wave ◽  
Temporal Muscle ◽  
Spectral Edge Frequency ◽  
Spectral Edge ◽  
Group I ◽  
Brain Responses ◽  
Processed Eeg ◽  
Group Ii

Clinically, the use of detomidine and butorphanol is suitable for sedation and deepening of analgosedation. The aim of our study was to establish the influence of detomidine used alone and a butorphanol-detomidine combination on brain activity and to evaluate and compare brain responses (using electroencephalography, EEG) by recording SEF90(spectral edge frequency 90%), individual brain wave fractions (beta, alpha, theta and delta) and electromyographic (EMG) changes in the left temporal muscle in standing horses. Ten clinically healthy cold-blooded horses were divided into two groups of five animals each. Group I received detomidine and Group II received detomidine followed by butorphanol 10 min later. SEF90, individual brain wave fractions and EMG were recorded with a pEEG (processed EEG) monitor using computerised processed electroencephalography and electromyography. The present study found that detomidine alone and the detomidine-butorphanol combination significantly reduced SEF90and EMG, and they caused changes in individual brain wave fractions during sedation and particularly during analgosedation. The EMG results showed that the detomidine-butorphanol combination provided greater and longer muscle relaxation. Our EEG and EMG results confirmed that the detomidine-butorphanol combination is safer and more appropriate forpainless and non-painless procedures on standing horses compared to detomidine alone.

scholarly journals Preliminary Study of the Use of Root with Sedline® EEG Monitoring for Assessment of Anesthesia Depth in 6 Horses

2020 ◽  
Vol 10 (3) ◽  
pp. 1050
Author(s):  
Olga Drewnowska ◽  
Bernard Turek ◽  
Barbara Lisowska ◽  
Charles E. Short
Keyword(s):  
Brain Activity ◽  
Muscle Relaxation ◽  
Eeg Monitoring ◽  
Careful Monitoring ◽  
Spectral Edge Frequency ◽  
Non Invasive ◽  
Anesthesia Monitoring ◽  
Physiologic Parameters ◽  
Preliminary Study ◽  
Anesthesia Depth

Management of equine anesthesia monitoring is still a challenge. Careful monitoring to provide guidelines for anesthesia depth assessment currently relies upon eye signs, cardiopulmonary responses, and the level of muscle relaxation. Electroencephalography, as a non-invasive brain activity monitor, may be used to complement the routinely monitored physiologic parameters. Six horses, undergoing various surgical procedures and anesthesia protocols, were monitored with the use of a Root with Sedline EEG monitor and a routine monitor of life parameters. The life parameters were compared to the changes on the EEG density spectral array observed live during anesthesia. During all procedures the level of awareness was monitored using the EEG, with higher frequency and power of waves indicating a higher level of awareness. It was evident from this that there were variations according to the type of procedure and the anesthetic protocol. Cerebral activity was elevated during painful moments of the surgery and recovery, requiring adjustments in anesthetic concentrations. Evaluation of changes in the spectral edge frequency (SEF) could show the periods when the patient is stabilized. EEG monitoring has the potential to be used in clinical anesthesiology of horses. It was shown that this system may be used in horses under general anesthesia but is currently less effective in a standing horse for diagnostic or minor procedures.

scholarly journals Xylazine, diazepam and midazolam premedicated ketamine anaesthesia in White Leghorn cockerels for typhlectomy

2006 ◽  
Vol 77 (1) ◽  
Author(s):  
S.K. Maiti ◽  
R. Tiwary ◽  
P. Vasan ◽  
A. Dutta
Keyword(s):  
Muscle Relaxation ◽  
Recovery Period ◽  
White Leghorn ◽  
Group Iii ◽  
Blood Electrolytes ◽  
Group I ◽  
Baseline Values ◽  
Group Ii ◽  
Single Comb ◽  
Surgical Operations

Thee different combinations of ketamine hydrochloride were used to induce general anaesthesia for surgical operations (typhlectomy) in 30 adult, single-comb White Leghorn cockerels. They were randomly divided into three groups, each comprising 10 birds. Birds in Group I received xylazine-ketamine combinations at the dose rate of 2 mg xylazine and 10 mg ketamine per kg i.v., whereas birds of Group II received diazepam (2.5 mg / kg i.v.) and 5 min later ketamine (75 mg / kg i.m.). In the Group III, midazolam (2 mg / kg i.m.) and 5 min later ketamine (50 mg / kg i.v.) was administered. The onset of sedation / anaesthesia was shortest (1.60 + 0.27 min) in Group I, followed by Group II (8.40 + 0.83 min) and Group III (17.10 + 1.71 min). Recovery period was shortest in the Group I (65-75 min) followed by Group II (80-85 min) and Group III (92-105 min). Sedation, muscle relaxation and surgical anaesthesia was optimal and excellent in Group I compared with the other two groups. Torticollis, salivation and dyspnoea were observed in Group III. Short-term limb contractions were present in all birds in Groups II and III, up to 20 min of observation. Recovery from anaesthesia was smooth in all three groups. A Surgical procedure (typhlectomy) was performed on all birds. Hypothermia was observed in Group II, whereas heart and respiratory depression was recorded in Group I. Blood sugar level did not vary significantly in any anaesthetic regime. The reduction of haemoglobin was maximum in Group II compared with Groups I and III. Hypoxaemia and hypercapnaea were elevated in all birds in Groups II and III. Blood electrolytes did not vary significantly from the baseline values among the three groups of birds during the period of observation (120 min). The xylazine-ketamine combination was found to be the best anaesthesia for surgical intervention in chickens.

The Effect of Propofol and Alfentanil on the Increase in Intraocular Pressure Due to Succinylcholine and Intubation

2000 ◽  
Vol 10 (2) ◽  
pp. 105-109 ◽  
Author(s):  
Z. Eti ◽  
A. Yayci ◽  
T. Umuroǧlu ◽  
F.Y. Göǧüş ◽  
N. Bozkurt
Keyword(s):  
Intraocular Pressure ◽  
Endotracheal Intubation ◽  
Elective Surgery ◽  
Muscle Relaxation ◽  
Group Iv ◽  
Vecuronium Bromide ◽  
Group Iii ◽  
Group I ◽  
Thiopental Sodium ◽  
Group Ii

Purpose The aim of this study was to evaluate the effects of propofol and alfentanil on the increase in intraocular pressure (IOP) due to succinylcholine and intubation, in comparison with thiopental sodium and vecuronium bromide. Methods Forty patients aged 20–50 years, scheduled for elective surgery requiring endotracheal intubation, were assigned to four groups of ten. General anesthesia was induced with 2.5 mg/kg propofol in Group I, 2.5 mg/kg propofol and 10 μg/kg alfentanil in Group II and 5 mg/kg thiopental in Groups III and IV; muscle relaxation was obtained with either 1.5 mg/kg succinylcholine (Group I, II and III) or 0.1 mg/kg vecuronium bromide (Group IV). In all patients mean arterial pressure, heart rate, oxygen saturation and IOP were recorded before (baseline) and after induction, after the muscle relaxant and after endotracheal intubation. Results Compared with their baseline values in Group I IOP decreased significantly after propofol (p<0.01) and increased significantly after intubation (p<0.01). In Group II IOP decreased significantly after propofol and alfentanyl (p<0.001), remained low after succinylcholine (p<0.01) and did not change after intubation. In Group III IOP decreased significantly after thiopental (p<0.001) and increased significantly after intubation (p<0.001). In Group IV it decreased significantly after thiopental (p<0.001), remained low after vecuronium (p<0.001) and increased significantly after intubation (p<0.05). Conclusions In all Groups, IOP did not increase significantly after succinylcholine, but only anesthesia induced with propofol and alfentanil prevented the increase in IOP due to intubation.

scholarly journals Study on Efficacy of Nalbuphine Hydrochloride as Pre-Emptive Analgesic – Comparison With Diclofenac Sodium after Open Cholecystectomy

2009 ◽  
Vol 20 (2) ◽  
pp. 39-44
Author(s):  
Md Quamrul Islam ◽  
Hasina Begum ◽  
AKM Akhtaruzzaman ◽  
UH Shahera Khatun
Keyword(s):  
Muscle Relaxation ◽  
Open Cholecystectomy ◽  
Diclofenac Sodium ◽  
Randomized Study ◽  
Afferent Input ◽  
P Value ◽  
Group Iii ◽  
Central Processing ◽  
Group I ◽  
Group Ii

Preemptive analgesia is an antinociceptive treatment that prevents establishment of altered central processing of afferent input from sites of injury. The aim of this study was to evaluate the effects of preemptively used nalbuphine and diclofenac on postoperative pain and opioid consumption. Seventy five patients scheduled for open cholecystectomy were investigated by randomized study. Patients were divided into three groups. In group I, patients received Inj. Nalbuphine Hydrochloride (0.3 mg/kg bw IV) before induction. In group II, patients received Inj. Diclofenac Sodium (1 mg/kg bw IV) before induction and in group III patients received placebo before induction. General Anesthesia was given in all groups with Inj. Thiopental sodium 5mg/kg and Inj. Succninylcholine 1.5mg/kg to facilitate endotracheal intubation. Anesthesia was maintained with halothane 0.5% and nitrous oxide 66% in oxygen. Muscle relaxation was maintained by Inj.Vecuronium 0.1 mg/kg. Intraoperative proper hydration was maintained by lactate ringer's solution.In post operative period patients in all three groups received Inj. Pethidine 10mg IV till the patients got relieved from pain. The minimum interval of giving pethidine was 10 minutes. Through our study we have found that, pethidine consumption in 24 hours in group-I (Nalbuphine group) was 54.00±1.0, in group-II (Diclofenac group) was 74.00±1.0 and in group-III (Placebo group) was 112.0±2.0 and p-value <0.001, which is highly significant (measured in mg). Time of first pethidine demand in group-I was 45.83±10.93, in group-II was 34.20±5.44and in group-III was 16.21±3.62 and p-value<0.001 which is also highly significant (measured in minute). Overall patients satisfaction was high in nalbuphine group. Under the condition of present study, we can conclude that preemptively used nalbuphine hydrochloride decreases post operative pain and opioid demand. Journal of BSA, Vol. 20, No. 2, July 2007 p.39-44

scholarly journals Comparative efficacy of imagery-based relaxation and abbreviated muscle relaxation training on the reaction ability of netball players

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Srilekha Saha
Keyword(s):  
Muscle Relaxation ◽  
Intervention Group ◽  
Control Group ◽  
Post Intervention ◽  
Group I ◽  
Depth Analysis ◽  
Baseline Evaluation ◽  
Term Evaluation ◽  
Group Ii ◽  
Experimental Group

<p>In this study, we investigated the benefits of differential psychotherapeutic intervention techniques on the modification of autonomic competence and its impact on the visual reaction ability of young competitive netball players. Thirty-six young female netball players with an age range of 18–24 years were recruited. Upon baseline evaluation of psychomotor (reaction time); physiological (resting heart-rate and VO<sub>2</sub>max) and psychobiological (Sc components: latency, amplitude and recovery time) indices, we categorised the subjects into three groups: Group I (control group in which the subjects did not receive any intervention), Group II (experimental group in which the subjects received abbreviated progressive muscle relaxation (APMR) training) and Group III (experimental group in which the subjects received imagery-based relaxation intervention (IRT) training). The subjects from the experimental groups (Group I and Group II) were subjected to their respective interventions (APMR and IRT) for 24 sessions following the protocol, viz., 20 min/day, 2 days/week for 12 weeks). After six weeks of intervention, we conducted mid-term evaluation on all of the aforementioned parameters that had been determined during baseline evaluation. Following this, intervention sessions were continued using the same protocol for six more weeks. At the end of twelfth week, we conducted post-intervention assessment on all psychological, psychomotor and psychobiological variables to verify the effect of training on the dependent measures. Based on the results, we found that there are improvements in various parameters during the mid-term evaluation and post-intervention analysis, which can be rationally attributed to the differential therapeutic interventions introduced to the subjects of the experimental groups. The results suggest that both of the intervention techniques facilitate in improving the reaction ability whereas our in-depth analysis clarifies that netball players with a relatively lower phasic Sc but with higher extent of amplitude, had faster recovery which will be highly beneficial since they are able to regulate their task-focus well enough to yield faster agile reaction performance.</p>

Analgesic and adjunct actions of nalbuphine hydrochloride in xylazine or xylazine and acepromazine premedicated horses

2015 ◽  
Author(s):  
Harish Kulkarni ◽  
B. Justin William ◽  
Ravi Sundar George ◽  
T. A. Kannan
Keyword(s):  
Body Weight ◽  
Dose Rate ◽  
Muscle Relaxation ◽  
Group Iii ◽  
Quality Of Recovery ◽  
Group I ◽  
The Mean ◽  
Group Ii ◽  
Mean Time

The study was conducted in eighteen clinical cases of horses for diagnostic and surgical procedures requiring general anaesthesia were randomly divided into three groups, group I, group II and group III, each consisting of six cases. All the horses were premedicated with glycopyrrolate at the dose rate of 0.02 mg/kg body weight, intravenously. Horses in Group I and Group II were administered xylazine hydrochloride at the dose rate of 1.10 mg/kg body weight intravenously, whereas in Group III at the dose rate of 0.50 mg/kg body weight intravenously. In Group III, acepromazine was injected after xylazine administration, at the dose rate of 0.02mg/kg body weight, intravenously. Before induction of anaesthesia, nalbuphine hydrochloride was administered for Group II and Group III at the dose rate of 0.75 mg/kg body weight intravenously. Ketamine hydrochloride was administered intravenously to induce anaesthesia at the dose rate of 2.20 mg/kg body weight and maintained with 0.50 mg/kg body weight in required cases to maintain for duration of 15 ± 1.04 minutes. The mean time for induction in group I, group II and group III were 1.78 ± 0.27, 1.73 ± 0.10 and 1.85 ± 0.28 minutes respectively. The mean total number of additional doses of ketamine for standard duration of 15 ± 1.04 minutes surgery required in group I, group II and group III were 5.00 ± 0.36, 1.66 ± 0.33 and 2.00 ± 0.36 respectively. The quality of induction was 100 per cent smooth in group III, 83.33 per cent smooth and 16.67 per cent rough in group II and 66.66 per cent smooth and 33.34 per cent rough in group I. The quality of analgesia in group I, group II and group III were 2.83 ± 0.47, 1.83 ± 0.30 and 1.33 ± 0.21 respectively. The quality of muscle relaxation in group I, group II and group III were 3.16 ± 0.30, 1.50 ± 0.22 and 1.33 ± 0.21 respectively. The mean time for recovery in group I, group II and group III were 23.00 ± 1.52, 33.00 ± 0.93 and 41.98 ± 1.32 minutes respectively. The mean number of attempts for unassisted standing in group I, group II and group III were 6.66 ± 0.71, 5.00 ± 0.57 and 5.00 ± 0.36 respectively. The quality of recovery was 83.33 per cent smooth and 16.67 per cent rough in group III, 66.66 per cent smooth and 33.34 per cent rough in group II and 50.00 per cent smooth and 50.00 per cent rough in group I. None of the animals in any groups showed any intra and post operative complication.

Ultrastructural Lesions Produced by Alcohol and Sucrose in the Heart and Liver of C57BL Mice

1970 ◽  
Vol 28 ◽  
pp. 208-209
Author(s):  
K.K. SEKHRI ◽  
C.S. ALEXANDER ◽  
H.T. NAGASAWA
Keyword(s):  
Osmium Tetroxide ◽  
Male Mice ◽  
Alcohol Group ◽  
Group Iii ◽  
Group I ◽  
C57bl Mice ◽  
Group Ii

C57BL male mice (Jackson Lab., Bar Harbor, Maine) weighing about 18 gms were randomly divided into three groups: group I was fed sweetened liquid alcohol diet (modified Schenkl) in which 36% of the calories were derived from alcohol; group II was maintained on a similar diet but alcohol was isocalorically substituted by sucrose; group III was fed regular mouse chow ad lib for five months. Liver and heart tissues were fixed in 2.5% cacodylate buffered glutaraldehyde, post-fixed in 2% osmium tetroxide and embedded in Epon-araldite.

Behavior in the Brain

2010 ◽  
Vol 24 (2) ◽  
pp. 76-82 ◽  
Author(s):  
Martin M. Monti ◽  
Adrian M. Owen
Keyword(s):  
Motor Behavior ◽  
Functional Neuroimaging ◽  
Brain Activity ◽  
Motor Output ◽  
The Unconscious ◽  
Ethical Implications ◽  
Brain Responses ◽  
Minimally Conscious ◽  
Brain Insults ◽  
Brain Behavior

Recent evidence has suggested that functional neuroimaging may play a crucial role in assessing residual cognition and awareness in brain injury survivors. In particular, brain insults that compromise the patient’s ability to produce motor output may render standard clinical testing ineffective. Indeed, if patients were aware but unable to signal so via motor behavior, they would be impossible to distinguish, at the bedside, from vegetative patients. Considering the alarming rate with which minimally conscious patients are misdiagnosed as vegetative, and the severe medical, legal, and ethical implications of such decisions, novel tools are urgently required to complement current clinical-assessment protocols. Functional neuroimaging may be particularly suited to this aim by providing a window on brain function without requiring patients to produce any motor output. Specifically, the possibility of detecting signs of willful behavior by directly observing brain activity (i.e., “brain behavior”), rather than motoric output, allows this approach to reach beyond what is observable at the bedside with standard clinical assessments. In addition, several neuroimaging studies have already highlighted neuroimaging protocols that can distinguish automatic brain responses from willful brain activity, making it possible to employ willful brain activations as an index of awareness. Certainly, neuroimaging in patient populations faces some theoretical and experimental difficulties, but willful, task-dependent, brain activation may be the only way to discriminate the conscious, but immobile, patient from the unconscious one.

Heterogeneity and Immunochemical Properties of Anti-β2-glycoprotein I Autoantibodies

1998 ◽  
Vol 80 (09) ◽  
pp. 393-398 ◽  
Author(s):  
V. Regnault ◽  
E. Hachulla ◽  
L. Darnige ◽  
B. Roussel ◽  
J. C. Bensa ◽  
...  
Keyword(s):  
Fluid Phase ◽  
Anticardiolipin Antibodies ◽  
Dual Reactivity ◽  
Group Iii ◽  
Important Group ◽  
Epitope Specificity ◽  
Glycoprotein I ◽  
Group I ◽  
Group Ii ◽  
Sufficient Concentration

SummaryMost anticardiolipin antibodies (ACA) associated with antiphospholipid syndrome (APS) are directed against epitopes expressed on β2-glycoprotein I (β2GPI). Despite a good correlation between standard ACA assays and those using purified human β2GPI as the sole antigen, some sera from APS patients only react in the latter. This is indicative of heterogeneity in anti-β2GPI antibodies. To characterize their reactivity profiles, human and bovine β2GPI were immobilized on γ-irradiated plates (β2GPI-ELISA), plain polystyrene precoated with increasing cardiolipin concentrations (CL/β2GPI-ELISA), and affinity columns. Fluid-phase inhibition experiments were also carried out with both proteins. Of 56 selected sera, restricted recognition of bovine or human β2GPI occurred respectively in 10/29 IgA-positive and 9/22 IgM-positive samples, and most of the latter (8/9) were missed by the standard ACA assay, as expected from a previous study. Based on species specificity and ACA results, IgG-positive samples (53/56) were categorized into three groups: antibodies reactive to bovine β2GPI only (group I) or to bovine and human β2GPI, group II being ACA-negative, and group III being ACA-positive. The most important group, group III (n = 33) was characterized by (i) binding when β2GPI was immobilized on γ-irradiated polystyrene or cardiolipin at sufficient concentration (regardless of β2GPI density, as assessed using 125I-β2GPI); (ii) and low avidity binding to fluid-phase β2GPI (Kd in the range 10–5 M). In contrast, all six group II samples showed (i) ability to bind human and bovine β2GPI immobilized on non-irradiated plates; (ii) concentration-dependent blockade of binding by cardiolipin, suggesting epitope location in the vicinity of the phospholipid binding site on native β2GPI; (iii) and relative avidities approximately 100-fold higher than in group III. Group I patients were heterogeneous with respect to CL/β2GPI-ELISA and ACA results (6/14 scored negative), possibly reflecting antibody differences in terms of avidity and epitope specificity. Affinity fractionation of 23 sera showed the existence, in individual patients, of various combinations of antibody subsets solely reactive to human or bovine β2GPI, together with cross-species reactive subsets present in all samples with dual reactivity namely groups III and II, although the latter antibodies were poorly purified on either column. Therefore, the mode of presentation of β2GPI greatly influences its recognition by anti-β2GPI antibodies with marked inter-individual heterogeneity, in relation to ACA quantitation and, possibly, disease presentation and pathogenesis.

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