Pharmacological agents for reducing the haemodynamic response to tracheal intubation in paediatric patients: a systematic review

Effects of different doses of alfentanil on cardiovascular response to rapid sequence intubation in elderly patients: a parallel-controlled randomized trial

BACKGROUND

Rapid sequence intubation (RSI) have been shown to be effective in preventing reflux aspiration in patients with a full stomach during anaesthesia induction and endotracheal intubation. However, there is currently no standardized operation protocol or anaesthesia induction drug standard for RSI. Furthermore, there is a lack of evidence regarding the use of RSI in patients older than 65. In this study, we aimed to investigate the cardiovascular effects of different doses of alfentanil combined with propofol and etomidate during RSI in elderly patients aged 65-80 years.

METHODS

A total of 96 patients aged 65-80 years who underwent general anaesthesia with tracheal intubation were selected for this study. The patients were randomly assigned to one of four groups using a random number table. Group A patients received an induction dose of 10 µg/kg alfentanil, group B patients received 15 µg/kg alfentanil, group C patients received 20 µg/kg alfentanil, and group D patients received 25 µg/kg alfentanil. Heart rate (HR), mean arterial pressure (MAP), cardiac index (CI), and ejection fraction (EF) were measured at three time points: 5 min before anaesthesia induction (T0), 1 min after endotracheal intubation (T1), and 5 min after endotracheal intubation (T2). Concurrently, 4 ml of arterial blood was collected from patients at three time points, and the concentrations of norepinephrine (NE) and cortisol (Cor) in plasma were detected. Occurrences of hypertension, hypotension, bradycardia and tachycardia during anesthesia induction to 5 min after tracheal intubation were noted.

RESULTS

Compared with T0, the HR, MAP, NE and Cor concentrations in group A and group B were increased at the T1 and T2 time points, CI and EF values were decreased (P < 0.05). HR and MAP in groups C and D were increased at the T1 time point, while they were decreased at the T2 time point in group D (P < 0.05). The changes in CI and EF values, concentrations of NE and Cor, were not significant at T1 and T2 time points in group C (P > 0.05). Additionally, they were not significant in group D at the T1 time point (P > 0.05), but decreased at the T2 time point (P < 0.05). Compared with group A, the HR, MAP, NE and Cor concentrations in groups C and D were decreased at T1 and T2 time points (P < 0.05). The CI and EF values of groups C and D were increased at T1 time point but decreased at T2 time point in group D (P < 0.05). The incidence of hypertension and tachycardia in group A was significantly higher than that in group C and group D (P < 0.05), and the incidence of hypotension and bradycardia in group D was significantly higher than that in group A and group B (P < 0.05).

CONCLUSION

Alfentanil 20 µg/kg for RSI in elderly patients, can effectively inhibit the violent cardiovascular reaction caused by intubation, and avoid the inhibition of cardiovascular system caused by large dose, hemodynamics more stable.

TRIAL REGISTRATION

ChiCTR2200062034 ( www.chictr.org.cn ).

Determination of the median effective dose of sufentanil for inhibiting the laryngeal mask insertion response in geriatric patients: a prospective, double-blinded, dose-response trial

Background

Laryngeal mask airway(LMA) have been widely used in clinical practice. Irritation to the patient during the insertion of a laryngeal mask can cause hemodynamic fluctuations, which is particularly unsafe for geriatric patients. We used probit regression analysis to determine the median effective dose of sufentanil to inhibit the response to LMA insertion in geriatric patients.

Methods

A total of 90 patients were selected for the study using the following inclusion criteria: age ≥ 65 years old, ASA grade I–III, and scheduled to undergo intravenous general anesthesia with LMA insertion. Each patient received a dose of sufentanil for anesthesia induction in one of six levels: 0.05, 0.1, 0.15, 0.2, 0.25, or 0.3 μg kg⁻¹. LMA insertion was scored with a 3-point, 6-category scale, with scores ≥ 16 indicating effective LMA insertion, and < 16 indicating ineffective LMA insertion. Mean arterial blood pressure (MAP), heart rate (HR), and bispectral index (BIS) were recorded 1 min before induction (T1), 1 min after induction (T2), 1 min after LMA insertion (T3), and 5 min after LMA insertion (T4) in each group. In addition, the plasma norepinephrine (NE) levels and adverse reactions were measured at T2 and T3 in each dosage group.

Results

Probit regression analysis showed that the ED50 of sufentanil inhibiting the response to LMA insertion in geriatric patients was 0.18 μg kg⁻¹ (95% CI: 0.16–0.21 μg kg⁻¹), and the ED95 was 0.31 μg kg⁻¹ (95% CI: 0.27–0.38 μg kg⁻¹), and the probit(p) = -2.34 + 12.90 × ln(Dose)(\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\chi^{2}$$\end{document}χ2 = 0.725, p = 0.948). Among all the patients, the number of effective LMA insertions was 57 (group A), and the number of ineffective LMA insertions was 33 (group B). The MAP, HR, and NE in group B were significantly higher than in group A at T3.

Conclusions

Sufentanil can effectively inhibit the patient’s response to LMA insertion, with stable hemodynamics and small stress response. The ED50 and ED95 were 0.18 μg kg⁻¹ (95% CI: 0.16–0.21 μg kg⁻¹) and 0.31 μg kg⁻¹(95% CI: 0.27–0.38 μg kg⁻¹), respectively.

Trial registration

This study was registered in the Chinese Clinical Trial Registry (Registration number: ChiCTR2100051827) on October 6, 2021.

Effect of ketamine combined with lidocaine in pediatric anesthesia

Background

We conducted a randomized clinical trial to determine whether adjunctive lidocaine diminishes the incidence of adverse effects in pediatric patients sedated with ketamine.

Methods

This case‐control study involved 586 consecutive pediatric patients necessitating anesthesia. Then systolic blood pressure, heart rate, respiratory rate, and blood oxygen saturation were observed. Alanine aminotransferase (ALT), aspartate aminotransferase (AST), urea nitrogen (BUN), and creatinine (Cr) levels were tested. General dose of ketamine, the time of onset and duration of anesthesia and postoperative recovery, anesthesia effect, and adverse reaction were subsequently compared. High‐performance liquid chromatography was employed to detect ketamine concentration at different time points after administration, and the postoperative cognition function was further evaluated.

Results

Intra‐ and post‐operation, the rising degree of ALT, AST, BUN, and Cr in patients treated with ketamine was higher than those in patients treated with the ketamine‐lidocaine complex. General dose of ketamine, the time of onset and duration of anesthesia, postoperative recovery time, and the incidence rate of adverse reaction in patients treated with ketamine‐lidocaine complex were lower, but the concentration of ketamine was higher compared to the patients treated with ketamine. In patients treated with the ketamine‐lidocaine complex, elimination half‐life of ketamine was prolonged, the area under curve was increased, and the plasma clearance rate was decreased relative to those with ketamine alone.

Conclusions

Ketamine combined with lidocaine may be beneficial in shortening the onset of anesthesia, promoting postoperative awake, prolonging elimination half‐life, increasing area under curve, and decreasing plasma clearance rate and incidence of adverse reactions.

The Effects of Acupuncture on Hemodynamic Changes During Endotracheal Intubation for General Anesthesia

Objective: The goal of this research was to investigate the efficacy of perioperative manual acupuncture in the LV 3 and LI 4 points for lessening hemodynamic changes during endotracheal intubation in patients who were receiving anesthesia. Materials and Methods: This double-blinded randomized controlled study enrolled patients who were undergoing endotracheal intubation, in 2015-2016, during general anesthesia in the general surgery department of the Imam Khomeini Hospital complex, in the Tehran University of Medical Sciences, Iran. The patients were randomly allocated into 2 groups with 30 patients in each group. In the treatment group, acupuncture needles were placed at LV 3 and LI 4, whereas, in the control group, the needles were placed 1 cm lateral to these points. Systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial blood pressure (MAP), and heart rate (HR) before and after placing the acupuncture needles, after induction, immediately, 1 minute, and 3 minutes after intubation were measured and recorded prospectively. Results: The patients had a mean age of 44.45 ± 12.72 years and included 35 (58.3%) males. Before acupuncture, demographic data, mean blood pressure (BP), and mean HR of the patients were not significantly different in the treatment and control groups. The mean SBP, DBP, MAP, and HR of all patients changed over time significantly (P < 0.001 for all). In the treatment group, mean SBP, DBP, and MAP changes immediately after the needles were placed were significantly less than those in the control group (P = 0.033, 0.024, and 0.024, respectively). Conclusions: Although acupuncture could have a very-short-term effect that reduces BP during endotracheal intubation, hemodynamic changes might not be prevented during endotracheal intubation.

The optimal bolus dose of sufentanil for satisfactory laryngeal mask airway (LMA) insertion conditions in chinese pediatric patients: A prospective double-blind randomized controlled trial (CONSORT)

BACKGROUND

This study aimed to estimate the optimal dose of sufentanil, coadministered with 2.5 mg/kg propofol, for satisfactory laryngeal mask airway (LMA) insertion conditions in Chinese children and to determine the optimal bolus dose.

METHODS

Seventy-five Chinese children aged 2 to 6 years with the American Society of Anesthesiologists physical status I or II, undergoing elective minor surgery were recruited. They were randomly divided into 5 different dosage groups (0, 0.05, 0.1, 0.15, 0.2 μg/kg). A predetermined sufentanil diluted with 5 mL saline was injected 30 s, 200 s later, followed by 2.5 mg/kg propofol over 10 s. After that the insertion conditions were assessed, using a 6-category score. The duration of apnea was recorded. A Probit analysis was performed to determine the ED50 and ED95 with 95% confidence interval for optimal conditions.

RESULTS

There were less hemodynamic changes in all sufentanil groups than propofol-only group, with 0.2 μg/kg patients showing the most stable cardiovascular responses and best insertion conditions. However, the duration of apnea increased with the increasing dosage of sufentanil. From Probit analysis, the ED50 and ED95 of sufentanil for optimum score were 0.064 μg/kg and 0.177 μg/kg, respectively.

CONCLUSION

In combination with propofol for anesthesia induction in Chinese children, sufentanil 0.2 μg/kg could prevent patients from dramatic hemodynamic change, providing satisfactory LMA insertion conditions.