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Objective:To evaluate effects of different medication forms of dexmedetomidine on perioperative cognitive function in elderly patients undergoing radical operation of gastric carcinoma, and Ramsay sedation score.Methods:A total of 150 patients aged 65 years and 75 years scheduled for elective radical operation of gastric carcinoma from December 2018 to December 2019 in Shanxi Provincial Cancer Hospital were enrolled, and they were divided into 3 groups according to random number table method: different medication forms of dexmedetomidine groups (group A, group B) and the control group (group C), 50 cases in each group. The patients in group A and group B continued to pump dexmedetomidine at a rate of 0.5 μg·kg -1·h -1 and 0.3 μg·kg -1·h -1 respectively for 15 min before induction of anesthesia. And the patients in group C were given intravenous pumping of an equal volume of 0.9% NaCl for 15 min. Subsequently, patients in group A and group B received continuous intravenous infusion of 0.3 μg·kg -1·h -1 for 30 min before the end of operation, the patients in group C received 0.9% NaCl infusion of equal volume until the end of operation. The cognitive function of the patients was measured by using the Monterey cognitive assessment scale (MoCA) the day before surgery and on day 1,3 and 7 after surgery, and the incidence of perioperative neurocognitive disorder (PND) was counted. Ramsay sedation score at 30 min, 24 h and 48 h after surgery was compared among the three groups. Results:There were 3 patients in group A and 3 patients in group C were excluded because they were transferred to ICU due to serious postoperative complications. There were significant differences in MoCA score among the three groups on day 1, 3, 7 after operation (all P < 0.01); MOCA score of group A, B and C on day 7 after operation was (26.9±0.7) scores, (26.6±1.0) scores, (26.3±1.2) scores, respectively, and the difference between group A and group C was statistically significant ( P < 0.01). The incidence of PND among the three groups on day 1, 3, 7 after surgery had statistically significant differences (all P < 0.05), and the incidence of PND in group A was lower than that in group B and C (all P < 0.05). Ramsay sedation score among the three groups at 30 min and 24 h, 48 h after operation showed statistically significant differences (all P < 0.01), and that in group C was lower than that in group A and group B, and the differences were statistically significant (all P < 0.01). Ramsay sedation score at 24 h after operation in group A was high than that in group B and group C (all P < 0.01). Conclusions:Dexmedetomidine assisted with anesthesia can reduce the incidence of PND in elderly patients undergoing radical operation of gastric carcinoma and enhance the sedative effect. What's more, the most obvious effect is the infusion of 0.5 μg·kg -1·h -1 before anesthesia induction.
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Objective To analyze the chemical constituents in fruits of Capparis spinosa by GC-MS analysis .Methods The compounds were extracted from Capparis spinosa by 70% ethanol after smash .After extraction by petroleum ether (boil-ing range was from 60 to 90 ℃) ,the compounds were analyzed by gas chromatography with a VF-5ms capillary column .The column was heated up from 80 ℃ to 300 ℃ ,15 ℃/min ,then maintained for 10 minutes ,vaporization temperature was 250 ℃ , carrier gas was Helium and the flow rate was 1 ml/min .The detection was carried out by mass spectrometry using electron im-pact ion source with 70 eV ionization voltages .The ion source temperature was 200 ℃ and split ratio was 30∶1 .The injection volume was 1 .0 μl .The content of the compounds was determined with peak area normalization method .Results 53 chroma-tographically peaks were separated and 48 chemical constituents were identified including hexadecanoic acid (21 .82% ) ,octade-canoic acid (7 .49% ) ,oleinic acid (42 .93% ) and monoolein (2 .39% ) .These chemical constituents were mainly saturated fatty acid ester ,unsaturated fatty acid ester and alkanes .Conclusion The method is rapid ,accurate and sensitive with the usage of GC-MS ,which could be used to identify main chemical constituents of Capparis spinosa in fruit .