scholarly journals Effect of Fentanyl Infusion on Heart Rate Variability and Anaesthetic Requirements in Isoflurane-Anaesthetized Horses

Animals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2922
Author(s):  
Petra Dmitrović ◽  
Jana Vanaga ◽  
Julien Dupont ◽  
Thierry Franck ◽  
Alexandra Gougnard ◽  
...  
Keyword(s):  
Heart Rate ◽  
Low Dose ◽  
Control Group ◽  
Loading Dose ◽  
Depth Of Anaesthesia ◽  
Anaesthetic Parameters ◽  
Fentanyl Plasma Concentration ◽  
Fentanyl Group ◽  
Control Group Group ◽  
Rate Infusion

Controversy continues to surround the use of opioids in equine anaesthesia, with variable effects reported. This blinded clinical study aimed to investigate the influence of a low-dose fentanyl continuous rate infusion (CRI) on isoflurane requirements, parasympathetic tone activity (PTA), and anaesthetic parameters in horses during general anaesthesia. All of the twenty-two horses included in the research underwent a standard anaesthetic protocol. Eleven horses in the fentanyl group (Group F) received a loading dose of fentanyl at 6 µg/kg, followed by a CRI of 0.1 µg/kg/min during anaesthesia. A further 11 horses in the control group (Group C) received equivalent volumes of normal saline. Anaesthetic parameters and PTA index were recorded during anaesthesia. The achieved mean fentanyl plasma concentration was 6.2 ± 0.83 ng/mL. No statistically significant differences between groups were found in isoflurane requirements, MAP values, and mean dobutamine requirements. However, horses in Group F required a significantly lower dose of additional ketamine to maintain a sufficient depth of anaesthesia. Significantly higher PTA values were found in the fentanyl group. Further research is warranted to determine the limitations of PTA monitoring, and the influence of various anaesthetics on its values.

scholarly journals A randomized controlled study of intravenous esmolol to attenuate the cardiovascular responses to laryngoscopy and endotracheal intubation

2020 ◽  
Vol 8 (3) ◽  
pp. 1103
Author(s):  
Ninad Deepak Chodankar ◽  
Bhagyashree Shivde
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
General Anaesthesia ◽  
Endotracheal Intubation ◽  
Elective Surgery ◽  
Cardiovascular Responses ◽  
Controlled Study ◽  
Control Group ◽  
Significant Difference ◽  
Control Group Group

Background: Objective is to compare the efficacy of intravenous Esmolol to attenuate the cardiovascular responses to laryngoscopy and endotracheal intubation with control group.Methods: Study was done on 60 adults, ASA grade I or II normotensive patients, undergoing elective surgery under general anaesthesia and willing to participate. These patients where be randomly allocated in to either group C (Control) or E (Esmolol). Group ‘C’ Control group. Group ‘E’, patients were given intravenous Esmolol 1.5 mg/kg 2 minutes before start of laryngoscopy. All patients were premedicated, induced and intubated using Thiopentone and Succinyl Choline as per the protocol. Heart Rate (HR), SBP, DBP and MAP were recorded at baseline (taken half an hour prior to anaesthesia), Before sedation, After induction but before intubation, Immediately after endotracheal intubation and Thereafter at 1, 2, 3, 4, 5 and 10 minutes.Results: Heart rate was lower in Group E as compared to Group C, and there was statistically significant difference immediately after intubation till 4 minutes after intubation. While Blood pressure was lower in Group E as compared to Group C, and there was statistically significant difference only immediately after intubation.Conclusions: In Normotensive patients requiring general anaesthesia with laryngoscopy and intubation, authors conclude that intravenous Esmolol 1.5 mg/kg attenuated Heart rate response but fails to satisfactorily prevent rise in blood pressure.

Abstract 13788: Acute Administration of Nicotine Induces Transient Elevation of Blood Pressure and Increases Myocardial Infarct Size in an Acute Myocardial Ischemia/reperfusion Rat Model

Circulation ◽  
2020 ◽  
Vol 142 (Suppl_3) ◽  
Author(s):  
Lifu Zhao ◽  
Wangde Dai ◽  
Juan Carreno ◽  
jianru shi ◽  
Michael Kleinman ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Infarct Size ◽  
Myocardial Infarct ◽  
Control Group ◽  
Myocardial Infarct Size ◽  
Loading Dose ◽  
Acute Effects ◽  
No Reflow ◽  
Fractional Shortening

Introduction: Nicotine is a major bioactive component in tobacco cigarettes and electronic cigarettes. Despite the fact that smokers are at higher risk of experiencing an acute myocardial infarction (AMI), there are few studies that have examined the acute effects of nicotine on AMI.To address this issue, our present study was to examine the acute effects of nicotine on myocardial infarct size, no reflow, cardiac hemodynamics and cardiac function in a rat myocardial infarct model. Methods: Forty-six female Sprague-Dawley rats were randomly divided into nicotine group and control group (n=23/group) and received an intravenous loading dose of nicotine at 2.0 μg/kg/min or saline for 30 minutes before starting coronary artery occlusion, then followed by a maintenance dose 0.35 μg/kg/min of nicotine to the end of 3.5 hours of occlusion (30 minutes) and reperfusion (3 hours). Results: At baseline, there were no difference between the two study groups, in systolic blood pressure (BP in mmHg) (nicotine, 69.0±2.7; control, 69.3±4.4; p > 0.05), or diastolic BP (nicotine, 45.7±3.2; control, 48.2±4.2; p > 0.05). Nicotine initially increased systolic BP (nicotine, 97.0±8.6; control, 69.2±3.3, p <0.05) and diastolic BP (nicotine, 65.6±6.4; control, 47.4±3.1, p < 0.01) at 10 minutes after starting injection of the loading dose; pressures dropped to control levels in both groups at 30 minutes. During occlusion/reperfusion, the BP and heart rate were not altered by nicotine. Nicotine significantly increased myocardial infarct size as a percentage of the ischemic risk zone compared to the controls (nicotine, 54.9 ± 1.9 %; control, 48.6 ± 2.7 %, p < 0.05), but nicotine did not affect the no-reflow size (nicotine, 34.8 ± 3.10 %; control, 33.7 ± 3.0%, p > 0.05). Nicotine did not alter fractional shortening assessed by echocardiography. Conclusions: Nicotine infusion can transiently increase blood pressure in anesthetized rats. During coronary occlusion and reperfusion, nicotine increased myocardial infarct size, but did not affect hemodynamics or fractional shortening, suggesting that the increase in infarct size was not simply due to an increase in oxygen demand due to altered afterload, heart rate or contractility, but may reflect a more direct effect on the myocardium.

The effect of perioperative magnesium sulphate on the total anesthetic and analgesic requirement in neck surgery

2021 ◽  
Vol 19 (3) ◽  
pp. 65-70
Author(s):  
Krupa R Patel ◽  
Keyword(s):  
Normal Saline ◽  
Magnesium Sulphate ◽  
Neck Surgery ◽  
Control Group ◽  
Loading Dose ◽  
Depth Of Anaesthesia ◽  
Analgesic Requirement ◽  
Perioperative Analgesia ◽  
Class 1 ◽  
The Mean

Background: The major perioperative goal is to provide adequate depth of anaesthesia along with optimum perioperative analgesia. One of the IV adjuvant that has been shown potential in pre-emptive analgesia is magnesium sulphate. This study was designed to assess the effect of perioperatively administered IV magnesium sulphate on anaesthetic and analgesic requirements. Materials And Methods: Sixty patients of ASA class 1, 2, 18-65 years of age scheduled for neck surgeries were randomly divided in to two groups. Group M received 40 mg/kg, magnesium sulphate in 100ml normal saline as loading dose over 20min followed by 8 mg/kg/hour as infusion till the end of the surgery during total intravenous anaesthesia with propofol, fentanyl and atracurium in neck surgeries. Group C received 100 ml normal saline as loading dose over 20min and thereafter continuous infusion of same volume of normal saline as received by group M. We observed total requirement of inj.propofol and inj.atracurium intraoperatively and duration of postoperative analgesia in both the groups. Results: The mean VAS score was consistently high in Group C than group M during first 24 hours which was statistically significant (p<0.05). The mean duration of total analgesia was significantly higher in group M. And total requirement of propofol and atracurium in control group were significantly higher compared to group receiving Mgso4.Conclusion: Perioperative use of magnesium sulphate as preloading and infusion shows reduced analgesic and anaesthetic drugs requirements in neck surgeries.

Acetaminophen: Neonatal hepatotoxicity due to late pregnancy exposure

1987 ◽  
Vol 45 ◽  
pp. 718-719
Author(s):  
G.A. Miranda ◽  
M.A. Arroyo ◽  
C.A. Lucio ◽  
M. Mongeotti ◽  
S.S. Poolsawat
Keyword(s):  
Low Dose ◽  
Fetal Liver ◽  
Late Pregnancy ◽  
Toxic Chemicals ◽  
Control Group ◽  
High Dose ◽  
Over The Counter ◽  
Liver And Kidney ◽  
Neonatal Liver ◽  
Childbearing Women

Exposure to drugs and toxic chemicals, during late pregnancy, is a common occurrence in childbearing women. Some studies have reported that more than 90% of pregnant women use at least 1 prescription; of this, 60% used more than one. Another study indicated that 80% of the consumed drugs were not prescribed, and of this figure, 95% were “over-the-counter” drugs. Acetaminophen, the safest of all over-the-counter drugs, has been reported to induce fetal liver necrosis in man and animals and to have abortifacient and embryocidal action in mice. This study examines the degree to which acetaminophen affects the neonatal liver and kidney, when a fatty diet is simultaneously fed to the mother during late pregnancy.Timed Swiss Webster female mice were gavaged during late pregnancy (days 16-19) with fat suspended acetaminophen at a high dose, HD = 84.50 mg/kg, and a low dose, LD = 42.25 mg/kg; a control group received fat alone.

The Effects of a Caffeine Placebo and Experimenter Expectation on Blood Pressure, Heart Rate, Well-Being, and Cognitive Performance

2001 ◽  
Vol 6 (1) ◽  
pp. 15-25 ◽  
Author(s):  
Harald Walach ◽  
Stefan Schmidt ◽  
Yvonne-Michelle Bihr ◽  
Susanne Wiesch
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Cognitive Task ◽  
Well Being ◽  
Control Group ◽  
Double Blind ◽  
Main Effect ◽  
The Difference ◽  
Being There ◽  
To Receive

We studied the effect of experimenter expectations and different instructions in a balanced placebo design. 157 subjects were randomized into a 2 × 4 factorial design. Two experimenters were led to expect placebos either to produce physiological effects or not (pro- vs. antiplacebo). All subjects except a control group received a caffeine placebo. They were either made to expect coffee, no coffee, or were in a double-blind condition. Dependent measures were blood pressure, heart rate, well-being, and a cognitive task. There was one main effect on the instruction factor (p = 0.03) with the group “told no caffeine” reporting significantly better well-being. There was one main effect on the experimenter factor with subjects instructed by experimenter “proplacebo” having higher systolic blood pressure (p = 0.008). There was one interaction with subjects instructed by experimenter “proplacebo” to receive coffee doing worse in the cognitive task than the rest. Subjects instructed by experimenter “antiplacebo” were significantly less likely to believe the experimental instruction, and that mostly if they had been instructed to receive coffee. Contrary to the literature we could not show an effect of instruction, but there was an effect of experimenters. It is likely, however, that these experimenter effects were not due to experimental manipulations, but to the difference in personalities.

The Hemodynamic and Fibrinolytic Response to Low Dose Epinephrine and Phenylephrine Infusions During Total Hip Replacement Under Epidural Anesthesia

1992 ◽  
Vol 68 (04) ◽  
pp. 436-441 ◽  
Author(s):  
Nigel E Sharrock ◽  
George Go ◽  
Robert Mineo ◽  
Peter C Harpel
Keyword(s):  
Heart Rate ◽  
Deep Vein Thrombosis ◽  
Cardiac Index ◽  
Total Hip Replacement ◽  
Epidural Anesthesia ◽  
Hip Replacement ◽  
Low Dose ◽  
Total Hip ◽  
Vein Thrombosis ◽  
Deep Vein

SummaryLower rates of deep vein thrombosis have been noted following total hip replacement under epidural anesthesia in patients receiving exogenous epinephrine throughout surgery. To determine whether this is due to enhanced fibrinolysis or to circulatory effects of epinephrine, 30 patients scheduled for primary total hip replacement under epidural anesthesia were randomly assigned to receive intravenous infusions of either low dose epinephrine or phenylephrine intraoperatively. All patients received lumbar epidural anesthesia with induced hypotension and were monitored with radial artery and pulmonary artery catheters.Patients receiving low dose epinephrine infusion had maintenance of heart rate and cardiac index whereas both heart rate and cardiac index declined significantly throughout surgery in patients receiving phenylephrine (p = 0.0001 and p = 0.0001, respectively). Tissue plasminogen activator (t-PA) activity increased significantly during surgery (p <0.0005) and declined below baseline postoperatively (p <0.005) in both groups. Low dose epinephrine was not associated with any additional augmentation of fibrinolytic activity perioperatively. There were no significant differences in changes in D-Dimer, t-PA antigen, α2-plasmin inhibitor-plasmin complexes or thrombin-antithrombin III complexes perioperatively between groups receiving low dose epinephrine or phenylephrine. The reduction in deep vein thrombosis rate with low dose epinephrine is more likely mediated by a circulatory mechanism than by augmentation of fibrinolysis.

Low-Dose Heparin and Deep-Vein Thrombosis after Total Hip Replacement

1976 ◽  
Vol 36 (01) ◽  
pp. 157-164 ◽  
Author(s):  
P. M Mannucci ◽  
Luisa E. Citterio ◽  
N Panajotopoulos
Keyword(s):  
Deep Vein Thrombosis ◽  
Total Hip Replacement ◽  
Hip Replacement ◽  
Low Dose ◽  
Control Group ◽  
Total Hip ◽  
Vein Thrombosis ◽  
Dose Heparin ◽  
Deep Vein ◽  
Low Dose Heparin

SummaryThe effect of subcutaneous low-dose heparin on postoperative deep-vein thrombosis (D. V. T.) (diagnosed by the 125I-labelled fibrinogen test) has been investigated in a trial of 143 patients undergoing the operation of total hip replacement. Two randomized studies were carried out: in one the scanning for D.V.T. was carried out daily for 7 days post operatively and in the other for 15 days. In both, the incidence of D.V.T. was significantly lower in the heparin-treated patients (P<0.005). Bilateral D.V.T. was also prevented (P<0.05), through the extension of D.V.T. to the distal veins of the thigh was not significantly reduced. Heparin treatment was, however, followed by a higher incidence of severe postoperative bleeding (P< 0.02) and wound haematoma formation (P< 0.005), and the postoperative haemoglobin was significantly lower than in the control group (P<0.005). A higher number of transfused blood units was also needed by the heparin treated patients (P<0.001).

Features of the cervix uteri in women of reproductive age with endometrial polyps and micropolyps

2016 ◽  
pp. 108-111
Author(s):  
T.F. Tatarchuk ◽  
◽  
D.G. German ◽  
Keyword(s):  
Reproductive Age ◽  
Cervix Uteri ◽  
Control Group ◽  
Women Of Reproductive Age ◽  
Endometrial Polyps ◽  
Group Iii ◽  
Aggressive Form ◽  
Group I ◽  
Group Ii ◽  
Control Group Group

The article presents the comparative analysis of the state of the cervix in women with endometrial polyps and micropolyps. Patients and methods. The study involved 130 patients aged 18-35 years: 70 patients with endometrial polyps (group I), 30 patients with micropolyps (group II) and 30 patients of the control group (group III). Results. According to the anamnesis of women in the I group were significantly more frequent diseases of the cervix, which corrected physical surgery methods, in particular cryodestruction. In group II, the representatives of these indicators were similar to healthy. Normal colposcopic picture met significantly less frequently in patients and I, and II group. The differences in the incidence of HPV high oncogenic risk in all groups were not statistically significant. Conclusion. Destructive methods used in the detection of any changes in the cervix are often overly aggressive, form scars and contributing to inflamaciones process. In the chain of events leading to the formation of PE, cervical pathology and its correction can take the basic place. Key words: endometrial polyp, micropolyps, chronic endometritis, uterine cervix, colposcopy.

The Preventive Effect of Fig Leaves’s (Ficus carica L.) towards Colon Histopathological Feature and IL-6 Serum Level on Ulcerative Colitis Induced Mice

2016 ◽  
Vol 1 (4) ◽  
Author(s):  
Hartini Tiono
Keyword(s):  
Ulcerative Colitis ◽  
Serum Level ◽  
Interleukin 6 ◽  
Methanolic Extract ◽  
Chronic Inflammatory Disease ◽  
Control Group ◽  
Preventive Effect ◽  
Histopathological Feature ◽  
Group I ◽  
Control Group Group

Ulcerative colitis is a chronic inflammatory disease mainly affects sigmoid colon and rectum. The inflammation process will activate NF-κB and leads to proinflamatory cytokine release such as Interleukin-6 (IL-6). Fig leaves contain a high level of flavonoid which can prevent NF-κB activation, and further inhibits IL-6 secretion. This research aims to see the preventive effect of methanolic extract of fig leaves towards colon histopathological feature and IL-6 serum level on ulcerative colitis induced mice. Balb/C male mice were randomly assigned into 5 groups (n=5). The treatment groups were dextran suphate sodium (DSS) control group (group I), methanolic extract of Fig leaves dose 28 mg/ day control group (group II), and methanolic extract of Fig leaves dose 7 mg/ day (group III), 14 mg/ day (group IV), and 28 mg/ day (group V) for 14 days, which at the 8th till 14th day were given DSS to induce colitis. The results showed that both of colon mucosal damage and IL-6 serum level of group I were significantly different from other groups (p=0,029). In  conclusion, the methanolic extract of Fig leaves can improve colon mucous damage and decrease IL-6 serum level on ulcerative colitis-induced mice. Keywords: ulcerative colitis, fig leaves, colon mucousal damage, interleukin-6

The Predictive Role of Biochemical Plasma Factors in Patients with Severe Traumatic Brain Injuries

2019 ◽  
Vol 70 (5) ◽  
pp. 1754-1757
Author(s):  
Marius Toma Papacocea ◽  
Ioana Anca Badarau ◽  
Mugurel Radoi ◽  
Ioana Raluca Papacocea
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Blood Cell ◽  
Brain Injuries ◽  
Hematological Parameters ◽  
Group Versus ◽  
Public Health Problem ◽  
Traumatic Brain Injuries ◽  
High Rate ◽  
Control Group

Traumatic brain injuries (TBI) represent a high impact public health problem due to a high rate of death , long term disability and occurrence especially in young adults. Despite several promising animal studies, several parameters were proposed as biological markers and were assessed for this aim. Our study proposes the study of the early biochemical changes in association to hematological parameters for severe TBI patients prognosis. 43 patients with acute TBI were included in study based on clinical, laboratory and imagistic findings. The severity of the TBI was established by Glasgow Coma Scale GCS 3-8. In all patients were evaluated hematologic parameters (Red blood cell count - RBC, Hematocrit, blood Hemoglobin, White blood cell - WBC, Platelet count and biochemical parameters (glucose, urea, creatinine, electrolytes). Outcome was expressed as Glasgow Outcome Scale (GOS), between 1-5. Values were compared to control group -15 cases. Significant early differences in body temperature, heart rate, and systolic blood pressure were observed in TBI group versus control (p[0.05). After correlation, laboratory findings significantly associated to severe outcome - GOS = 1, 2 - (p[0.05) were plasma Na decrease and significant glucose increase. An early increase of temperature and decrease of Na may predict a severe outcome in patients with acute TBI; association with shifts in heart rate and blood pressure, imposes aggressive treatment measures.

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