OBJECTIVES: To investigate the regulatory role of astrocytes in the dorsomedial hypothalamus (DMH) during sevoflurane anesthesia emergence. METHODS: Forty-two male C57BL/6 mice were randomized into 6 groups (n=7) for assessing astrocyte activation in the dorsomedial hypothalamus (DMH) under sevoflurane anesthesia. Two groups of mice received microinjection of agfaABC1D promoter-driven AAV2 vector into the DMH for GCaMP6 overexpression, and the changes in astrocyte activity during sevoflurane or air inhalation were recorded using calcium imaging. For assessing optogenetic activation of astrocytes, another two groups of mice received microinjection of an optogenetic virus or a control vector into the DMH with optic fiber implantation, and sevoflurane anesthesia emergence was compared using behavioral experiments. In the remaining two groups, electroencephalogram (EEG) recording during sevoflurane anesthesia emergence was conducted after injection of the hChR2-expressing and control vectors. Anesthesia induction and recovery were assessed by observing the righting reflex. EEG data were recorded under 2.0% sevoflurane to calculate the burst suppression ratio (BSR) and under 1.5% sevoflurane for power spectrum analysis. Immunofluorescence staining was performed to visualize the colocalization of GFAP-positive astrocytes with viral protein signals. RESULTS: Astrocyte activity in the DMH decreased progressively as sevoflurane concentration increased. During 2.0% sevoflurane anesthesia, the mice injected with the ChR2-expressing virus exhibited a significantly shortened wake-up time (P<0.05), and optogenetic activation of the DMH astrocytes led to a marked reduction in BSR (P<0.001). Under 1.5% sevoflurane anesthesia, optogenetic activation resulted in a significant increase in EEG gamma power and a significant decrease in delta power in ChR2 group (P<0.01). CONCLUSIONS Optogenetic activation of DMH astrocytes facilitates sevoflurane anesthesia emergence but does not significantly influence anesthesia induction. These findings offer new insights into the mechanisms underlying anesthesia emergence and may provide a potential target for accelerating postoperative recovery and managing anesthesia-related complications.
Animals ; Astrocytes/physiology* ; Sevoflurane ; Mice, Inbred C57BL ; Mice ; Male ; Electroencephalography ; Anesthetics, Inhalation/pharmacology* ; Hypothalamus/cytology* ; Anesthesia Recovery Period ; Methyl Ethers/pharmacology*

Objective To systematically evaluate the effects of total intravenous anesthesia and inhalational anesthesia on postoperative recovery in patients undergoing transsphenoidal pituitary tumor resection.Methods A comprehensive search was conducted in international biomedical databases including Ovid Medline,Embase,CINAHL(EBSCO),Cochrane Library,and Web of Science,from inception to July 4,2023.Additionally,ClinicalTrials.gov and the World Health Organization International Clinical Trials Registry Platform were searched for ongoing and completed trials.The randomized controlled trials(RCT)comparing total intravenous anesthesia and inhalational anesthesia in patients undergoing transsphenoidal surgery for pituitary tumors were included.The methodological quality of the included studies was evaluated by the Cochrane Collaboration tool.Relevant data were extracted and synthesized for analysis.Results A total of 327 records were identified,of which eight RCTs met the inclusion criteria.Four studies showed that the patients receiving desflurane or sevoflurane anesthesia experienced faster emergence from anesthesia than those receiving propofol.Two studies indicated that patients in the propofol group had lower levels of emergence agitation and a lower incidence of early postoperative nausea and vomiting.The results on postoperative cognitive function were inconsistent across studies.No differences were found between the groups in terms of postoperative complications or overall recovery quality during hospitalization.Conclusions Inhalational anesthesia appears to provide an advantage in promoting faster emergence following transsphenoidal pituitary surgery,whereas total intravenous anesthesia may contribute to smoother and more stable recovery.Further high-quality studies are needed to clarify the effects of different anesthetic techniques on both short- and long-term postoperative recovery.
Humans ; Anesthesia, Intravenous ; Pituitary Neoplasms/surgery* ; Anesthesia, Inhalation ; Randomized Controlled Trials as Topic ; Anesthesia Recovery Period ; Pituitary Gland/surgery* ; Postoperative Period

OBJECTIVE: To investigate the effect of electroacupuncture pretreatment on the quality of recovery in the patients undergoing laparoscopic gastrointestinal surgery. METHODS: Sixty patients for elective laparoscopic resection of gastrointestinal tumors under general anesthesia were randomly assigned to either an observation group or a control group, with 30 patients in each group. In the control group, the routine inhalation-intravenous combined general anesthesia was adopted. On the basis of the control group, in the observation group, 30 min before anesthesia induction, electroacupuncture was applied to bilateral Neiguan (PC 6) and Neimadian (Extra) for 30 min, using disperse-dense wave and at 2 Hz/100 Hz. The recovery time of spontaneous breathing, awakening time, extubation time, and the post-anesthesia care unit (PACU) stay time were compared between the two groups. Mean arterial pressure (MAP), heart rate (HR), and oxygen saturation (SpO₂) were recorded at multiple time points: before electroacupuncture (T0), before extubation (T1), immediately after extubation (T2), 5 minutes (T3) and 10 minutes (T4) after extubation, and upon discharge from PACU (T5). The visual analogue scale (VAS) score for pain and Ramsay sedation score at T3, T4 and T5 were observed; and the incidence of agitation, nausea and vomiting at T5 was evaluated in the two groups. At T0 and T5, the serum levels of tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and cortisol were determined in the two groups. RESULTS: In the observation group, the recovery time of spontaneous breathing, awakening time, extubation time, and PACU stay time were shorter (P<0.001), MAP and HR at T2 were lower (P<0.01, P<0.05), the VAS scores for pain at T3, T4, and T5 dropped (P<0.001, P<0.01), and the Ramsay sedation score at T3 reduced (P<0.05) compared with those in the control group. The incidence of nausea and vomiting was lower in the observation group when compared with that in the control group (P<0.05). In comparison with the indexes at T0, the serum levels of TNF-α, IL-6, and cortisol increased at T5 in both groups (P<0.01); and these indexes at T5 in the observation group were lower than those in the control group (P<0.01, P<0.05). CONCLUSION Electroacupuncture pretreatment can enhance the quality of recovery in the patients undergoing laparoscopic gastrointestinal tumor surgery, shorten the time for spontaneous breathing recovery, awakening, extubation and PACU stay, and attenuate postoperative pain and stress response.
Humans ; Electroacupuncture ; Female ; Male ; Middle Aged ; Laparoscopy ; Adult ; Aged ; Anesthesia Recovery Period ; Interleukin-6/blood* ; Pain, Postoperative/therapy* ; Tumor Necrosis Factor-alpha/blood* ; Young Adult ; Gastrointestinal Neoplasms/therapy* ; Acupuncture Analgesia

OBJECTIVE: To explore the effect of auricular point pressure on anesthetic recovery in the patients undergoing laparoscopic cholecystectomy. METHODS: One hundred and forty patients undergoing laparoscopic cholecystectomy were randomized into a trial group (52 cases, 2 cases dropped out) and a control group (52 cases, 2 cases were eliminated). In the control group, the conventional anesthesia program and recovery intervention were adopted. In the trial group, on the basis of the regimen as the control group, the intervention of auricular point pressure was supplemented. The auricular points on the right side were selected, including sympathetic (AH_6a), brain (subcortex, AT₄), thalamus, exciting point, heart and sore center. One day before operation, the auricular point pressure started; and the auricular points were stimulated specially before anesthesia (T0), at the moment of operation ending (T1), when entering the recovery room, at the moment of the tube removal (T2) and in 10 min of the tube removal (T3), respectively; each auricular point was pressed for 1 min a time. The recovery time of spontaneous breathing, the time of eye opening, the removal time of endotracheal tube, the recovery time of orientation, and the time of exiting recovery room were compared between the two groups. The score of pain visual analogue scale (VAS) and that of Richmond agitation-sedation scale (RASS) at T2, T3 and when exiting recovery room (T4), and the relevant circulatory indexes (heart rate [HR], systolic blood pressure [SBP], diastolic blood pressure [DBP] and mean arterial pressure [MAP]) at T0, T1, T2 and T3 were observed in the two groups. RESULTS: In the trial group, the recovery time of spontaneous breathing, the time of eye opening, the removal time of endotracheal tube, the recovery time of orientation, the time of exiting recovery room were shorter than those of the control group (P<0.01, P<0.05). The pain VAS and RASS scores at T2, T3 and T4, as well as HR, SBP, DBP and MAP at T0, T1, T2 and T3 were not different statistically between the two groups (P>0.05). CONCLUSION Auricular point pressure can shorten the recovery time from anesthesia in the patients undergoing laparoscopic cholecystectomy.
Humans ; Cholecystectomy, Laparoscopic ; Male ; Female ; Middle Aged ; Adult ; Anesthesia Recovery Period ; Acupuncture Points ; Aged ; Young Adult

INTRODUCTION: Post-anaesthesia care unit (PACU) delirium is a potentially preventable condition that results in a significant long-term effect. In a multicentre prospective cohort study, we investigate the incidence and risk factors of postoperative delirium in elderly patients undergoing major non-cardiac surgery. METHODS: Patients were consented and recruited from 4 major hospitals in Singapore. Research ethics approval was obtained. Patients older than 65 years undergoing non-cardiac surgery >2 hours were recruited. Baseline perioperative data were collected. Preoperative baseline cognition was obtained. Patients were assessed in the post-anaesthesia care unit for delirium 30-60 minutes after arrival using the Nursing Delirium Screening Scale (Nu-DESC). RESULTS Ninety-eight patients completed the study. Eleven patients (11.2%) had postoperative delirium. Patients who had PACU delirium were older (74.6±3.2 versus 70.6±4.4 years, P=0.005). Univariate analysis showed those who had PACU delirium are more likely to be ASA 3 (63.6% vs 31.0%, P=0.019), had estimated glomerular filtration rate (eGFR) of >60mL/min/1.73m2 (36.4% vs 10.6%, P=0.013), higher HbA1C value (7.8±1.2 vs 6.6±0.9, P=0.011), raised random blood glucose (10.0±5.0mmol/L vs 6.5±2.4mmol/L, P=0.0066), and moderate-severe depression (18.2% vs 1.1%, P=0.033). They are more likely to stay longer in hospital (median 8 days [range 4-18] vs 4 days [range 2-8], P=0.049). Raised random blood glucose is independently associated with increased PACU delirium on multivariate analysis.
Aged ; Anesthesia ; Anesthesia Recovery Period ; Delirium/etiology* ; Humans ; Incidence ; Postoperative Complications/etiology* ; Prospective Studies ; Risk Factors

Obstructive sleep apnea syndrome (OSAS) increases the risk of post-surgery complications. This study uses Berlin Questionnaire (BQ) to identify Chinese adult surgical patients who are at a high risk of OSAS and to determine if the BQ could be used to detect potential high risk of adverse respiratory events in the post anesthesia care unit (PACU). Results indicated that only 11.4% of the patients were considered at a high risk of OSAS. Age and body mass index are the key factors for the risk of OSAS prevalence in China and also gender specific. Furthermore, the incidence of adverse respiratory events in the PACU was higher in patients with high risk of OSAS than others (6.8% vs. 0.9%, P < 0.001). They also stayed longer than others in the PACU (95 ± 28 min vs. 62 ± 19 min, P < 0.001). Age, high risk for OSAS, and smoking were independent risk factors for the occurrence of adverse respiratory events in the PACU. The BQ may be adopted as a screening tool for anesthesiologists in China to identify patients who are at high risk of OSAS and determine the potential risk of developing postoperative respiratory complications in the PACU.
Adolescent ; Adult ; Age Distribution ; Aged ; Aged, 80 and over ; Anesthesia Recovery Period ; Berlin ; Body Mass Index ; China ; epidemiology ; Female ; Humans ; Logistic Models ; Male ; Middle Aged ; Postoperative Complications ; epidemiology ; Risk Assessment ; Risk Factors ; Severity of Illness Index ; Sex Distribution ; Sleep Apnea, Obstructive ; epidemiology ; Surgical Procedures, Operative ; adverse effects ; Surveys and Questionnaires ; Young Adult

OBJECTIVES: The insulin-like growth factor binding proteins (IGFBP) regulate the bioavailability and bioactivity of insulin-like growth factor. We aimed to evaluate whether the IGFBP-3 level undergo major changes during perioperative periods according to the different kind of anesthetic agents. METHODS: Eighteen adults scheduled for elective total abdominal hysterectomy were enrolled. The patients were randomly assigned to have either propofol or isoflurane for maintenance of general anesthesia. A venous sample was taken for analysis of IGFBP-3 at the following time points: before induction, at the time of peritoneal closure, 1 hour after extubation at recovery room, and 2 and 5 postoperative days. The samples were analyzed by enzyme linked immunosolvent assay. RESULTS: Demographic data were similar between groups. In the both groups, the IGFBP-3 concentration decreased after anesthesia induction, reaching a nadir at the time of peritoneal closure without a significant difference between groups. In analysis between groups, the IGFBP-3 concentration in the isoflurane group on the postoperative 5th day was recovered to preoperative value and significantly higher than that in the propofol group (P < 0.05). CONCLUSION: This is the first study to show that the anesthetics used for general anesthesia affect the IGFBP-3 level during perioperative periods. The decrease of IGFBP-3 level following anesthesia induction in the isoflurane group was recovered to preoperative value, whereas that observed in the propofol group was not recovered on the postoperative 5th day. Further study is needed to establish the definitive effect of general anesthetics on IGFBP-3 and provide a comprehensive interpretation.
Adult ; Anesthesia ; Anesthesia, General ; Anesthetics ; Anesthetics, General ; Biological Availability ; Humans ; Hysterectomy ; Insulin-Like Growth Factor Binding Protein 3 ; Insulin-Like Growth Factor Binding Proteins ; Isoflurane ; Perioperative Period ; Propofol ; Recovery Room

The most frequent perioperative cardiovascular event is cardiac dysrhythmia, defined as an abnormality of cardiac rate, rhythm or conduction. Although the occurrence of arrhythmia during the perioperative period is not uncommon, a case of newly developed perioperative atrial flutter which spontaneously converts to atrial fibrillation is rare. We report a case of atrial flutter that developed immediately after induction of general anesthesia, in a 70-year-old male patient who previously had a normal sinus rhythm. Atrial flutter changed spontaneously to atrial fibrillation after discharge to the recovery room. Dysrhythmia was unresponsive to drug therapy, and the atrial fibrillation disappeared after electric cardioversion.
Aged ; Anesthesia, General* ; Arrhythmias, Cardiac ; Atrial Fibrillation* ; Atrial Flutter* ; Drug Therapy ; Electric Countershock ; Humans ; Male ; Perioperative Period ; Recovery Room

BACKGROUND: Emergence agitation (EA) is one of the most common complications after general anesthesia. The goal of this retrospective study was to determine the risk factors of EA in adult patients who underwent general anesthesia. METHODS: We retrospectively investigated the medical records of 5,358 adult patients who stayed in the postanesthesia care unit (PACU) of our hospital after general anesthesia during the 1-year period from January 2014 to December 2014. Psychological and behavioral status in the PACU was determined by the Aono four-point scale. Grade of 3 or 4 were considered as manifestations of EA. Multiple variables assessed EA risk factors. RESULTS: Two-hundred-forty-five patients (4.6%) developed EA. In multivariate analysis, male gender (OR = 1.626, P = 0.001), older age (OR = 1.010, P = 0.035), abdominal surgery (OR = 1.633, P = 0.002), spine surgery (OR = 1.777, P = 0.015), longer duration of anesthesia (OR = 1.002, P < 0.001), postoperative nausea and vomiting (OR = 20.164, P < 0.001) and postoperative pain (OR = 3.614, P < 0.001) were risk factors of EA. CONCLUSIONS: Male gender and older patients were risk factors of EA after general anesthesia in adult patients. Careful attention is needed for patients who receive abdominal or spine surgery, and who receive prolonged anesthesia. Adequate postoperative analgesia and antiemetic therapy should be provided to reduce the incidence of EA.
Adult* ; Analgesia ; Anesthesia ; Anesthesia Recovery Period ; Anesthesia, General* ; Delirium ; Dihydroergotamine* ; Humans ; Incidence ; Male ; Medical Records ; Multivariate Analysis ; Pain, Postoperative ; Postoperative Nausea and Vomiting ; Retrospective Studies ; Risk Factors* ; Spine

PURPOSE: During emergence from anesthesia for a craniotomy, maintenance of hemodynamic stability and prompt evaluation of neurological status is mandatory. The aim of this prospective, randomized, double-blind study was to compare the effects of dexmedetomidine and remifentanil on airway reflex and hemodynamic change in patients undergoing craniotomy. MATERIALS AND METHODS: Seventy-four patients undergoing clipping of unruptured cerebral aneurysm were recruited. In the dexmedetomidine group, patients were administered dexmedetomidine (0.5 µg/kg) for 5 minutes, while the patients of the remifentanil group were administered remifentanil with an effect site concentration of 1.5 ng/mL until endotracheal extubation. The incidence and severity of cough and hemodynamic variables were measured during the recovery period. Hemodynamic variables, respiration rate, and sedation scale were measured after extubation and in the post-anesthetic care unit (PACU). RESULTS: The incidence of grade 2 and 3 cough at the point of extubation was 62.5% in the dexmedetomidine group and 53.1% in the remifentanil group (p=0.39). Mean arterial pressure (p=0.01) at admission to the PACU and heart rate (p=0.04 and 0.01, respectively) at admission and at 10 minutes in the PACU were significantly lower in the dexmedetomidine group. Respiration rate was significantly lower in the remifentanil group at 2 minutes (p<0.01) and 5 minutes (p<0.01) after extubation. CONCLUSION: We concluded that a single bolus of dexmedetomidine (0.5 µg/kg) and remifentanil infusion have equal effectiveness in attenuating coughing and hemodynamic changes in patients undergoing cerebral aneurysm clipping; however, dexmedetomidine leads to better preservation of respiration.
Adult ; Aged ; Airway Extubation ; *Anesthesia Recovery Period ; Cough/drug therapy ; *Craniotomy/adverse effects ; Dexmedetomidine/*pharmacology/therapeutic use ; Double-Blind Method ; Female ; Hemodynamics/*drug effects ; Humans ; Male ; Middle Aged ; Piperidines/*pharmacology/therapeutic use ; Prospective Studies ; Reflex/*drug effects ; Respiratory System/blood supply/*drug effects/physiopathology ; Young Adult