scholarly journals Effect of Different Loading Doses of Dexmedetomidine on Controlled Hypotension and the Incidence of Bradycardia During Rhinoplasty: A Clinical Trial

2021 ◽  
Vol 11 (4) ◽  
Author(s):  
Soudabeh Djalali Motlagh ◽  
Faranak Rokhtabnak ◽  
Mohammad Reza Ghodraty ◽  
Mojtaba Maleki Delarestaghi ◽  
Sara Saadat ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Heart Rate ◽  
Hypotensive Effect ◽  
Loading Dose ◽  
Controlled Hypotension ◽  
Physical Status ◽  
Surgical Field ◽  
American Society ◽  
Double Blinded ◽  
American Society Of Anesthesiologists

: Controlled hypotension, with a mean arterial pressure (MAP) of 60 mmHg - 70 mmHg, provides a bloodless and visible surgical field during rhinoplasty. It has been shown that dexmedetomidine, an α2-adrenoreceptor agonist, is a suitable choice in this regard. One of the disadvantages of this drug is the possibility of severe bradycardia during infusion. Therefore, we compared lower intravenous (IV) loading doses to determine whether the hypotensive effect of the drug was preserved and the bradycardia incidence decreased. In this randomized, double-blinded clinical trial, 81 patients aged 18 to 50 years with the American Society of Anesthesiologists physical status (ASA-PS) class I and II, scheduled for rhinoplasty randomly received 1.0, 0.9, and 0.8 µg/kg (named as groups 1.0, 0.9, and 0.8, respectively) of IV dexmedetomidine before the induction of anesthesia followed by infusion (0.3 - 0.7 µg/kg/h) during operation. The patients’ heart rate (HR), MAP, the requirements for nitroglycerin (NTG) and extra fentanyl, as well as the incidence of bradycardia, were recorded. Bleeding and visibility of the surgical field were scored by the surgeon using a 6-point visual scale. MAPs, HRs, and consumption of NTG and extra fentanyl were similar in the studied groups. The surgical field was more visible and bloodless in group 1.0 compared to group 0.8 (P < 0.001); the differences were not significant between groups 1.0 and 0.9 (P = 0.605). The incidence (P = 0.027) and the severity of bradycardia (P = 0.017) were higher in the groups with higher loading doses. We concluded that dexmedetomidine is an acceptable agent to provide controlled hypotension. A loading dose of 0.9 µg/kg, but not 0.8 µg/kg, provides similar surgical field conditions as the dose of 1 µg/kg. Furthermore, despite the decrease in the incidence of bradycardia, the hypotensive effect of the drug is preserved.

Comparative Hemodynamic Depression of Sevoflurane versus Halothane in Infants 

1997 ◽  
Vol 87 (4) ◽  
pp. 795-800 ◽  
Author(s):  
Eric Wodey ◽  
Patrick Pladys ◽  
Catherine Copin ◽  
Marie Madeleine Lucas ◽  
Andre Chaumont ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cardiac Index ◽  
Elective Surgery ◽  
Physical Status ◽  
Inhalation Induction ◽  
Cardiovascular Side Effects ◽  
American Society ◽  
End Tidal ◽  
American Society Of Anesthesiologists ◽  
To Receive

Background The cardiovascular side effects of volatile anesthetics are one of the chief causes of postoperative complications in children, and infants seem to be at the greatest risk for this. This study compared cardiovascular changes at equipotent concentrations of sevoflurane and halothane in infants. Methods Thirty infants classified as American Society of Anesthesiologists physical status I or II who required elective surgery were randomized to receive either halothane or sevoflurane for inhalation induction. Cardiovascular and echocardiographic data were recorded in both groups at baseline and at end-tidal concentrations of 1 and 1.5 minimum alveolar concentration (MAC). Results Sevoflurane did not alter heart rate or cardiac index at all concentrations compared with awake values. Sevoflurane significantly decreased blood pressure and systemic vascular resistance compared with awake values at all concentrations. Shortening fraction and rate-corrected velocity of circumferential fiber shortening decreased at 1.5 but not at 1 MAC. Myocardial contractility assessed by stress-velocity index and stress-shortening index decreased significantly at all concentrations, but did not fall into the abnormal range at any concentration. Halothane caused a greater decrease in heart rate, shortening fraction, stress-shortening index, velocity of circumferential fiber shortening, stress-velocity index, and cardiac index at all concentrations than did sevoflurane. Conclusion Sevoflurane causes a lesser decrease in cardiac output than does halothane in infants.

Comparison of the Potency of Different Propofol Formulations

2014 ◽  
Vol 120 (2) ◽  
pp. 355-364 ◽  
Author(s):  
Morgan Le Guen ◽  
Stanislas Grassin-Delyle ◽  
Camille Cornet ◽  
Antoine Genty ◽  
Thierry Chazot ◽  
...  
Keyword(s):  
Primary Outcome ◽  
Saline Solution ◽  
Elective Surgery ◽  
Verbal Response ◽  
Closed Loop System ◽  
Physical Status ◽  
American Society ◽  
Double Blinded ◽  
American Society Of Anesthesiologists ◽  
Blinded Trial

Abstract Background Several commercial formulations of propofol are available. The primary outcome of this study was the required dose of propofol alone or combined with lidocaine to achieve induction of general anesthesia. Methods This multicenter, double-blinded trial randomized patients (American Society of Anesthesiologists physical status I–III) just before elective surgery with the use of a computer-generated list. Three different propofol 1% formulations—Diprivan® (Astra-Zeneca, Cheshire, United Kingdom), Propofol® (Fresenius-Kabi AG, Bad Homburg, Germany), and Lipuro® (B-Braun, Melshungen AG, Germany)—were compared with either placebo (saline solution) or lidocaine 1% mixed to the propofol solution. Depth of anesthesia was automatically guided by bispectral index and by a computerized closed-loop system for induction, thus avoiding dosing bias. The authors recorded the total dose of propofol and duration of induction and the patient’s discomfort through a behavioral scale (facial expression, verbal response, and arm withdrawal) ranging from 0 to 6. The authors further evaluated postoperative recall of pain using a Visual Analog Scale. Results Of the 227 patients enrolled, 217 were available for analysis. Demographic characteristics were similar in each group. Propofol® required a higher dose for induction (2.2 ± 0.1 mg/kg) than Diprivan® (1.8 ± 0.1 mg/kg) or Lipuro® (1.7 ± 0.1 mg/kg; P = 0.02). However, induction doses were similar when propofol formulations were mixed with lidocaine. Patient discomfort during injection was significantly reduced with lidocaine for every formulation: Diprivan® (0.5 ± 0.3 vs. 2.3 ± 0.3), Propofol® (0.4 ± 0.3 vs. 2.4 ± 0.3), and Lipuro® (1.1 ± 0.3 vs. 1.4 ± 0.3), all differences significant, with P &lt; 0.0001. No adverse effect was reported. Conclusion Plain propofol formulations are not equipotent, but comparable doses were required when lidocaine was concomitantly administered.

scholarly journals Hemodynamic response to Sevoflurane and Propofol induction: a comparative study

2015 ◽  
Vol 2 (1) ◽  
pp. 2-7
Author(s):  
Prabhat Rawal ◽  
Uday Bajracharya
Keyword(s):  
Heart Rate ◽  
Mean Arterial Pressure ◽  
Arterial Pressure ◽  
Critical Event ◽  
Physical Status ◽  
Hemodynamic Stability ◽  
Elective Surgical Procedures ◽  
Inhalational Anesthetic ◽  
American Society ◽  
American Society Of Anesthesiologists

  Background: Induction of anesthesia is a critical event and hemodynamic stability is an important factor during this period. Propofol is a commonly used intravenous anesthetic and Sevoflurane is a newly introduced inhalational anesthetic in the context of a developing country. This study compared the hemodynamics on induction of anesthesia with Propofol and Sevoflurane.Methods: A total of 108 American Society of Anesthesiologists physical status I patients undergoing elective surgical procedures under general anesthesia were randomized into two groups. Group ‘P’ patients were induced with intravenous 1% Propofol and Group ‘S’ patients were induced with inhalation of 8% Sevoflurane. Mean arterial pressures and heart rates were recorded at baseline, before induction, during induction and at 1, 3 and 5 minutes after induction of anesthesia before endotracheal intubation.Results: The two groups were comparable with respect to demographics and baseline hemodynamic parameters. There was a significant decrease in mean arterial pressure and heart rate from pre-induction values within both groups during and after induction. The reduction in mean arterial pressure was significantly more in Propofol group transiently during induction. The reduction in heart rate was significantly more in Sevoflurane group at 1, 3 and 5 minutes after induction (P < 0.05).Conclusion: Induction of anesthesia with Propofol demonstrated a greater decrease in mean arterial pressure whereas induction with Sevoflurane was associated with greater reduction in heart rate.Journal of Society of Anesthesiologists of Nepal 2015; 2(1): 2-7

scholarly journals Patient-Controlled Epidural Levobupivacaine with or without Fentanyl for Post-Cesarean Section Pain Relief

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Shin-Yan Chen ◽  
Feng-Lin Liu ◽  
Yih-Giun Cherng ◽  
Shou-Zen Fan ◽  
Barbara L. Leighton ◽  
...  
Keyword(s):  
Cesarean Section ◽  
Epidural Analgesia ◽  
University Hospital ◽  
Control Regimen ◽  
Background Infusion ◽  
Continuous Background ◽  
American Society ◽  
Group B ◽  
Double Blinded ◽  
American Society Of Anesthesiologists

Purpose.The purpose of this study was to compare the analgesic properties of levobupivacaine with or without fentanyl for patient-controlled epidural analgesia after Cesarean section in a randomized, double-blinded study.Methods.We enrolled American Society of Anesthesiologists class I/II, full-term pregnant women at National Taiwan University Hospital who received patient-controlled epidural analgesia after Cesarean section between 2009 and 2010. Eighty women were randomly assigned into two groups. In group A, the 40 subjects received drug solutions made of 0.6 mg/ml levobupivacaine plus 2 mcg/ml fentanyl, and in group B the 40 subjects received 1 mg/ml levobupivacaine. Maintenance was self-administered boluses and a continuous background infusion.Results.There were no significant differences in the resting and dynamic pain scales and total volume of drug used between the two groups. Patient satisfaction was good in both groups.Conclusion.Our study showed that pure epidural levobupivacaine can provide comparative analgesic properties to the levobupivacaine-fentanyl combination after Cesarean section. Pure levobupivacaine may serve as an alternative pain control regimen to avoid opioid-related adverse events in parturients.

scholarly journals Epidural Anaesthesia Saved A Patient With Multiple Co-Morbid Condition

KYAMC Journal ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 729-730
Author(s):  
Rahena Khatun ◽  
Md Zulfikar Ali
Keyword(s):  
Epidural Anaesthesia ◽  
Postoperative Recovery ◽  
Morbid Condition ◽  
Physical Status ◽  
Uncontrolled Diabetes ◽  
Life Saving ◽  
Diabetic Gangrene ◽  
American Society ◽  
American Society Of Anesthesiologists ◽  
Morbid Conditions

Epidural anaesthesia has been routinely used for many years and widely accepted as an effective mathod of pain relief . The procedure is commonly performed as a sole anaesthesic or in combination with spinal or general anaesthesia. In our case Md. Alauddin, 59 years old male was admitted in KYAMCH with complaints of diabetic gangrene of right foot with features of septicemia and he has a long history uncontrolled diabetes mellitus and hypertension leading to developed ischemia heart disease and CRF. After proper evaluation patient's physical status was graded as ASA (American society of Anesthesiologists) class-IV, and selected for above knee amputation of right lower limb but patient was unfit for anesthesia due to his co morbid conditions. As a life saving procedure the operation was done under epidural anesthesia and per- operative and postoperative recovery was uneventful.KYAMC Journal Vol. 7, No.-1, Jul 2016, Page 729-730

scholarly journals Discordant American Society of Anesthesiologists Physical Status Scoring between Anesthesiologists and Surgeons Is Correlated With Adverse Patient Outcomes: A Retrospective Cohort Study of 46284 Elective Surgical Patients

2021 ◽  
Author(s):  
Charlene Xian Wen Kwa ◽  
Jiaqian Cui ◽  
Daniel Yan Zheng Lim ◽  
Yilin Eileen Sim ◽  
Yuhe Ke ◽  
...  
Keyword(s):  
Cohort Study ◽  
Patient Outcomes ◽  
Real World ◽  
Odds Ratio ◽  
Retrospective Cohort ◽  
Clinical Factors ◽  
Physical Status ◽  
Asa Score ◽  
American Society ◽  
American Society Of Anesthesiologists

Abstract BackgroundThe American Society of Anesthesiologists Physical Status Classification (ASA) score is used for communication of patient health status, risk scoring, benchmarking and financial claims. Prior studies using hypothetical scenarios have shown poor concordance of ASA scoring among healthcare providers. However, there is a paucity of concordance studies using real-world data, as well as studies of clinical factors or patient outcomes associated with discordant scoring. The study aims to assess real-world ASA score concordance between surgeons and anesthesiologists, factors surrounding discordance and its impact on patient outcomes. MethodsThis retrospective cohort study was conducted in a tertiary academic medical center on 46284 consecutive patients undergoing elective surgery between January 2017 and December 2019. ASA scores entered by surgeons and anesthesiologists, patient demographics, and post-operative outcomes were collected. We assessed the concordance of preoperative ASA scoring between surgeons and anesthesiologists, clinical factors associated with score discordance, the impact of score discordance on clinically important outcomes, and the discriminative ability of the two scores for 30-day mortality, 1-year mortality, and intensive care unit (ICU) admission. Statistical tests used included Cohen’s weighted 𝜅 score, chi-square test, t-test, unadjusted odds ratios and logistic regression models. ResultsThe ASA score showed moderate concordance (weighted Cohen’s 𝜅 0.53) between surgeons and anesthesiologists. 15098 patients (32.6%) had discordant scores, of which 11985 (79.4%) were scored lower by surgeons. We found significant associations between discordant scores and anesthesiologist-assessed comorbidities, patient age and race. Patients with discordant scores had a higher risk of 30-day mortality (odds ratio 2.00, 95% confidence interval [CI] = 1.52-2.62, p<0.0001), 1-year mortality (odds ratio 1.53, 95% CI = 1.38-1.69, p < 0.0001), and ICU admission >24 hours (odds ratio 1.69, 95% CI = 1.47-1.94, p< 0.0001), and stratified analyses showed a trend towards higher risk when the surgeons’ ASA score was lower. ConclusionsThere is moderate concordance between surgeons and anesthesiologists in assigning the ASA classification. Discordant ASA scores are associated with adverse patient outcomes. Hence, there is a need for improved standardization of ASA scoring and cross-specialty review in ASA-discordant cases.

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