The use of nitrous oxide-oxygen inhalation sedation to relieve anxiety and pain in dental outpatient treatment has been a very mature and safe technique in the world. This technology has been introduced into China for nearly 20 years, and many clinical cases have proved its safety, practicability and effectiveness, which can meet the clinical needs of patients. To further standardize and popularize this technique, the Society of Sedation and Analgesia, Chinese Stomatological Association formed the recommended application guidelines after many discussions and revisions on the basis of widely soliciting opinions and referring to relevant literatures. It covers indications, contraindications, standardized operation procedures, occupational protection, identification and treatment of adverse reactions, training and other aspects. This guideline can be used as a reference for the use of nitrous oxide-oxygen inhalation sedation techniques in the outpatient setting of dentistry.
Anesthesia, Dental ; Anesthetics, Inhalation/adverse effects* ; Conscious Sedation/methods* ; Dental Anxiety/prevention & control* ; Humans ; Nitrous Oxide/adverse effects* ; Outpatients ; Oxygen

The data obtained from present experiments demonstrated that among several inhalation anesthetics, ether was the most irritable, resulting in marked irregularity of respiratory movement, and halothane depressed respiratory rate more than the other. The pulse rate and blood pressure were decreased marked1y in ether and the halothane anesthesia. the rate of beat of the isolated atria was not greately altered after anesthesia with ether or trichlore-thylene, while it was reduced after chloroform or halothane inhalation. The response of isolated atria to exogeneous norepinephrine was most prominent in the atria isolated from halothane anesthetized rabbits. Myocardial catecholamine contents were reduced uniformly after anesthesia with each anesthetics and most significantly with the halothane inhalation. From the above results, it may be concluded that the increasing cardiac activity with general inhalation anesthetics is closely related to the quantitative changes of the endogenous myocardial catecholamine contents.
Anesthesia, Inhalation/adverse effects ; Anesthetics/*toxicity ; Animals ; Catecholamines/*metabolism ; Heart/*drug effects ; Myocardium/*metabolism ; Norepinephrine/*pharmacology ; Rabbits

OBJECTIVETo investigate the effect of propofol and isoflurane on surgical stress response and postoperative cognitive function in elderly patients.

METHODSSixty elderly patients scheduled for elective upper abdominal surgery with general anesthesia were randomized equally into propofol group and isoflurane group. The surgical stress response, postoperative Mini-mental State Examination (MMSE) and the rate of postoperative cognitive dysfunction (POCD) were compared between the two groups.

RESULTSThe surgical stress response in propofol group was relatively stable. Compared with isoflurane group, the patients in propofol group showed significantly faster recovery of the MMSE scores with also lower rate of POCD.

CONCLUSIONCompared with isoflurane, propofol intravenous anesthesia is associated with rapid recovery of the cognitive function, stable surgical stress response and reduced adverse effects in elderly patients.

Abdomen ; surgery ; Aged ; Aged, 80 and over ; Anesthesia Recovery Period ; Anesthetics, Inhalation ; adverse effects ; Anesthetics, Intravenous ; adverse effects ; Cognition ; drug effects ; Cognition Disorders ; chemically induced ; Female ; Humans ; Isoflurane ; adverse effects ; Male ; Middle Aged ; Postoperative Complications ; etiology ; Propofol ; adverse effects ; Stress, Physiological

OBJECTIVETo observe the clinical effectiveness of inductions and tracheal intubating conditions with 3% sevoflurane and different doses of remifentanil without muscle relaxant in children.

METHODSTotally 120 peadiatric patients (aged 4-10 years, American Society of Anesthesiologists grade I for inhalational induction) were randomly allocated into group I (remifentanil 1 microg/kg), group II (remifentanil 2 microg/kg), group III (remifentanil 3 microg/kg), and control group (vecuronium bromide 0.1 mg/kg). After inhalational induction with 3% sevoflurane and 60% nitrous oxide in 40% oxygen for 2 minutes, remifentanil 1 microg/kg, 2 microg/ kg, and 3 microg/kg were intravenously injected over 1 minute into patients in group I , group II, and group III, respectively. After remifentanil administration and manual ventilation for 1 minute, the trachea was intubated. In the control group, 2 minutes after intravenous administration of vecuronium bromide 0.1 mg/kg, tracheal intubation was attempted. Agitation, intubating satisfactoriness, and the circulation changes after tracheal intubation and anesthesia induction were observed.

RESULTSIn these four groups, agitation occurred in 37.5% of patients during sevoflurane induction. Satisfactory intubation rate was 70.0% in group I, 86.7% in group II, 90.0% in group III, and 93.3% in the control group. Compared with the control group, the impact of tracheal intubation on the circulatory system was smaller in group I , II , and III.

CONCLUSIONSInduction with 3% sevoflurane combined with remifentanil can be smoothly performed, followed by the successful tracheal intubation. The intubating conditions are more satisfactory with 3% sevoflurane combined with remifentanil 2 microg/kg or 3 microg/kg.

Anesthesia, Inhalation ; Anesthetics, Inhalation ; administration & dosage ; Child ; Child, Preschool ; Dose-Response Relationship, Drug ; Female ; Humans ; Intubation, Intratracheal ; adverse effects ; Male ; Methyl Ethers ; administration & dosage ; Piperidines ; administration & dosage

OBJECTIVETo compare the effects of propofol target controlled infusion (TCI) and sevoflurane inhalational anesthesia on the hemodynamics and postoperative recovery in patients undergoing laparoscopic cholecystectomy.

METHODSSixty ASA IorII patients scheduled for laparoscopic cholecystectomy were randomized into propofol TCI group (group P) and sevoflurane inhalational anesthesia group (group S). In group P, TCI propofol was maintained after intubation until incision closure with the target concentration at 3 microg/ml. In group S, sevoflurane (end-tidal concentration of 2%) was maintained with oxygen flow rate of 2 L/min until incision closure. Fentanyl and vecuronium were intravenously infused according to the depth of anesthesia during the operation. MAP and HR were measured before anesthesia (T(1)), immediately after intubation (T(2)), at skin incision (T(3)), 10 min after pneumoperitoneum (T(4)) and immediately after completion of the operation (T(5)) respectively. Awake time, postoperative nausea and vomiting of the patients were observed after operation.

RESULTSThere was significant difference in MAP and HR at T(4) between the two groups (P<0.05), but not at T(1), T(2), T(3) and T(5) (P>0.05). No significant difference was also found in the awake time between the two groups (P>0.05). The incidence of PONV, however, was significantly lower in group P than in group S (P<0.05).

CONCLUSIONPropofol TCI and sevoflurane inhalational anesthesia are all effective in inducing good anesthetic effect, maintaining hemodynamic stability and ensuring rapid recovery, but propofol TCI causes lower incidence of PONV in operations such as laparoscopic cholecystectomy.

Adolescent ; Adult ; Anesthesia, Inhalation ; adverse effects ; methods ; Cholecystectomy, Laparoscopic ; Female ; Hemodynamics ; drug effects ; Humans ; Infusion Pumps ; Male ; Methyl Ethers ; administration & dosage ; adverse effects ; pharmacology ; Middle Aged ; Postoperative Complications ; etiology ; Propofol ; administration & dosage ; adverse effects ; pharmacology ; Young Adult

PURPOSE: Although there is no clinical evidence of nephrotoxicity with the volatile anesthetics currently used in general anesthesia, a better agent should be needed in terms of preserving postoperative renal function in living kidney donors who have only single remaining kidney. The purpose of the current retrospective, single-center study was to evaluate and compare renal function of living kidney donors after nephrectomy under either sevoflurane or desflurane anesthesia. MATERIALS AND METHODS: From January 2006 through December 2011, a total of 228 donors undergoing video assisted minilaparotomy surgery nephrectomy for kidney donation were retrospectively enrolled in the current study. The donors were categorized into a sevoflurane group or desflurane group based on the type of volatile anesthetic used. We collected laboratory data from the patients preoperatively, immediately after the operation, on the first postoperative day and on the third postoperative day. We also compared renal function of the kidney donors after donor nephrectomy by comparing creatinine level and estimated glomerular filtration rate (eGFR). RESULTS: The decrease in renal function after surgery in both groups was the most prominent on the first postoperative day. There were no significant differences between the two groups in postoperative changes of creatinine or eGFR. CONCLUSION: Sevoflurane and desflurane can be used safely as volatile anesthetics in donors undergoing nephrectomy.
Adult ; Anesthesia, General/methods ; Anesthetics, Inhalation/adverse effects/*therapeutic use ; Female ; Humans ; Isoflurane/adverse effects/*analogs & derivatives/therapeutic use ; Kidney/*physiology ; Kidney Function Tests ; *Kidney Transplantation ; *Living Donors ; Male ; Methyl Ethers/adverse effects/*therapeutic use ; *Nephrectomy ; Postoperative Complications ; Retrospective Studies

BACKGROUNDStudies on postoperative cognitive dysfunction (POCD) have attracted extensive attention and achieved significant progress. However, the diagnosis of POCD is not very satisfactory as no specific biomarkers have been classified. The aim of the present study was to evaluate differences in serum protein composition between POCD and Non-POCD patients, identify potential biomarkers associated with early POCD, and study the mechanism underlying POCD.

METHODSSixty-eight elderly patients (age ≥ 65 years) received isoflurane inhalation anesthesia for arthroplasty surgeries. One day before and seven days after the surgery, these patients were subjected to a neuropsychological test and venous blood sample collection. Postoperative cognitive dysfunction was determined using Z test scores. Based on the results, the patients were divided into POCD and non-POCD groups. Twenty-five randomly chosen blood samples obtained seven days after the surgery from each group were analyzed on a Bruker ultraFlex(TM) time of flight (TOF)/TOF mass spectrophotometer. The resulting peptide fingerprints were compared with those from the pre-surgery samples to identify differences in serum protein composition. The model designed to distinguish between a non-POCD group and a POCD group were established and validated. Three proteins with the most significant changes were selected for further characterization.

RESULTSThirty-three cases were diagnosed as POCD. Using the Clinprotools software, 58 polypeptides were found to display differential expression (P < 0.05). Using a support vector algorithm method, seven differential peaks were isolated to establish a diagnostic model to distinguish POCD patients from normal individuals. The prediction rate and recognition rate were 96.89% and 100%, respectively. Validation of this model showed that the accuracy rates were 100% and 85% using samples from the POCD and non-POCD groups, respectively. Protein analysis also led to the identification of fibrinopeptide A (FPA) as a potential biomarker for POCD.

CONCLUSIONSArthroplastic surgery under isoflurane inhalation anesthesia causes differential serum protein expression in elderly patients. These differentially expressed proteins may contribute to the diagnosis of early POCD, which may provide a basis for identifying the underlying mechanism of POCD development.

Aged ; Anesthesia, Inhalation ; adverse effects ; Arthroplasty ; adverse effects ; Cognition Disorders ; blood ; diagnosis ; Female ; Humans ; Isoflurane ; adverse effects ; Male ; Middle Aged ; Neuropsychological Tests ; Postoperative Complications ; blood ; psychology ; Postoperative Period ; Proteomics ; methods

OBJECTIVE: To identify the incidence and the risk factors for emergence agitation (EA) in adults undergoing general anesthesia for nasal surgery. METHOD: We examined 674 patients aged ≥ 18 years who underwent general anesthesia for nasal surgery between February 2013 and February 2015. The patients were divided into control group (518 cases) and EA group (156 cases) by Sedation-agitation scale (SAS) method. Demographic and clinical variables were assessed and the data were analyzed by multiple logistic regression analysis. RESULT: The overall incidence of emergence agitation was 23. 15%. Significant difference was observed between EA and the control group in many aspects, such as sex, age, ASA classify, smoking history, history of cerebrovascular disease, preoperative anxiety, the use of midazolam, anesthesia means, postoperative pain, postoperative analgesia, presence of a tracheal tube, and presence of a urinary catheter. The results of multiple logistic regression analysis indicated that the occurring of EA was significantly correlated with younger age, male, preoperative anxiety, inhalation anesthesia, postoperative pain, presence of a tracheal tube, and presence of a urinary catheter, while seniors, with the use of midazolam, total intravenous anesthesia, analgesia and natural awakening were protective factors. CONCLUSION EA following general anesthesia is a common complication in patients with adult nasal surgery. To reduce the occurrence and consequences of agitation episodes, elimination of the associated risk factors is necessary, especially in patients with risk factors.
Adult ; Age Factors ; Analgesia ; Anesthesia Recovery Period ; Anesthesia, General ; adverse effects ; Anesthesia, Inhalation ; Anxiety ; Female ; Humans ; Incidence ; Male ; Midazolam ; therapeutic use ; Nasal Surgical Procedures ; Pain, Postoperative ; Psychomotor Agitation ; physiopathology ; Risk Factors

OBJECTIVE: To determine the maximum dose of continuously infused mivacurium for intraoperative neuromonitoring and observe its adverse effects in thyroid surgery. METHODS: Twenty-eight patients undergoing thyroid surgery with intraoperative neuromonitoring received continuous infusion of mivacurium at the initial rate of 5.43 μg?kg?min, and the infusion rate for the next patient was adjusted based on the response of the previous patient according to the results of neurological monitoring. The depth of anesthesia was maintained with sevoflurane and remifentanil during the surgery. The LD50 and 95% of mivacurium were calculated using Brownlee's up-and-down sequential method. RESULTS: The LD50 of continuously infused mivacurium was 8.94 μg?kg?min (95% : 8.89- 8.99 μg?kg?min) during thyroid surgery, which did not affect neurological function monitoring. Transient chest skin redness occurred after induction in 9 patients (32.1%). None of the patients experienced intubation difficulties or showed intraoperative body motions during the surgery. CONCLUSIONS In patients undergoing thyroid surgery under anesthesia maintained by inhalation and intravenous infusion, the LD50 of mivacurium was 8.94 μg?kg?min (95% : 8.89-8.99 μg?kg?min) for continuous infusion, which does not cause serious adverse effects during the operation.
Anesthesia ; Anesthetics, Inhalation ; Anesthetics, Intravenous ; Humans ; Intraoperative Neurophysiological Monitoring ; methods ; Lethal Dose 50 ; Mivacurium ; administration & dosage ; adverse effects ; Neuromuscular Nondepolarizing Agents ; administration & dosage ; adverse effects ; Remifentanil ; Sevoflurane ; Thyroid Gland ; surgery

The effects of electroacupuncture (EA) on the minimum alveolar concentration (MAC) and on the cardiovascular system were evaluated with dogs under isoflurane anesthesia. Eight healthy male beagles were randomly assigned to six study groups (five heads/group) with washout intervals of 7 ~ 31 days between experiments for recovery and anesthetic clearance. MAC of isoflurane and cardiovascular parameters were determined after EA at nonacupoint and and at acupoints LI-4, SP-6, ST-36 and TH-8. Electroacupuncture for 30 minutes at LI-4, SP-6, ST-36 and TH-8 acupoints lowered the MAC of isoflurane by 17.5 +/- 3.1%, 21.3 +/- 8.0%, 20.5 +/- 8.2% and 15.6 +/- 3.1%, respectively (p < 0.05). However, electrical stimulation of nonacupoint did not induce a significant change in MAC of isoflurane. In the cardiovascular system, the ST-36 group did not induce any significant change in cardiovascular parameters. In the TH-8 group, the mean and diastolic arterial pressure and the systemic vascular resistance were decreased. In the LI-4 group, cardiac output and cardiac index decreased after EA. These results indicate that EA at LI-4, SP-6 and ST-36 have advantages in isoflurane anesthesia in terms of reducing the dose of anesthetics and minimizing cardiovascular side effects.
Anesthesia, Inhalation/adverse effects/*veterinary ; Anesthetics, Inhalation/*pharmacokinetics/pharmacology ; Animals ; Blood Pressure/drug effects ; Cardiac Output ; Dogs/*metabolism/physiology ; Electroacupuncture/*veterinary ; Heart Rate/drug effects ; Isoflurane/*pharmacokinetics/pharmacology ; Male ; Pulmonary Alveoli/*metabolism ; Pulmonary Wedge Pressure/drug effects ; Random Allocation ; Vascular Resistance/drug effects