Objective To investigate the effect of the use of glycopyrrolate before anesthesia on the perioperative circulation of patients undergoing laparoscopic cholecystectomy(LC).Methods 88 patients undergoing LC from March to June in 2024 were enrolled and randomly divided into two groups:the glycopyrrolate group(group G)and the control group(group C),with 44 patients in each.Three patients from group G and four from group C were excluded,leaving 41 patients in group G and 40 patients in group C.Ten minutes before anesthesia induction,group G received an intravenous dose of 4 μg/kg glycopyrrolate diluted to 5 mL with normal saline.The control group received an equal volume of normal saline.Both groups then received an intravenous infusion of dexmedetomidine at 1 μg/kg over 10 minutes.Heart rate(HR)and mean arterial pressure(MAP)were monitored immediately before infusion of glycopyrrolate/saline(T0),5 min after infusion(T1),10 min after infusion(T2),1 min after tracheal intubation(T3),immediately at skin incision(T4),2 min after pneumoperitoneum(T5),dissociating the cholecyst(T6),and 1 min after tracheal tube drawing(T7).Intraoperative amounts of propofol,rocuronium bromide,sufentanil,remifentanil,oral secretion score,PACU stay time,first postoperative flatus time and the occurrence of perioperative adverse reactions were observed.Results HR at T2,T3,T4,T5,and T6 time points was significantly higher in group G than in group C,while MAP at T1,T2,T3,T4,T5 time points was also significantly higher in group G(P<0.05).HR at T2 time points in Group G was significantly lower than that at T0,while T7 was significantly higher than that at T0 time points.In Group C,HR at T1,T2,T4,T5,and T6 time points was significantly lower than that at T0 time points,while T7 time points was significantly higher than that at T0 time points,with the differences being statistically significant(P<0.05).In Group G,MAP at T1 and T2 time pointswas significantly higher than that at T0,and MAP at T6 was significantly lower than that at T0 time points,and in Group C,MAP at T4,T5 and T6 time points was significantly lower than that at T0 time points,and the differences were all statistically significant(P<0.05);Oral secretion was lower in group G compared to group C,with a significant difference(P<0.05).The incidence of bradycardia was significantly lower in group G compared to group C(P<0.05).The incidence of oral dryness within 24 h postoperatively was higher in group G compared to group C(P<0.05).There were no significant differences of HR at T0,T1,and T7 time points,MAP at T0,T6,and T7 time points between the two groups(P>0.05);There were no significant differences of operation time,propofol usage,sufentanil usage,remifentanil usage,rocuronium bromide usage during operation,rate of atropine use,incidence of intraoperative hypotension,PACU stay time,first postoperative flatus,and nausea vomiting rate between the two groups(P>0.05);No delirium occurred in either group of patients 24 h after the operation.Conclusion Use of glycopyrrolate before anesthesia can be effectively applied to patients undergoing LC,is beneficial in reducing the incidence of bradycardia,maintaining the stability of intraoperative circulation,and has no significant effect on the incidence of postoperative delirium and nausea and vomiting.It is a worthy clinical application.

Objective To investigate the effect of the use of glycopyrrolate before anesthesia on the perioperative circulation of patients undergoing laparoscopic cholecystectomy(LC).Methods 88 patients undergoing LC from March to June in 2024 were enrolled and randomly divided into two groups:the glycopyrrolate group(group G)and the control group(group C),with 44 patients in each.Three patients from group G and four from group C were excluded,leaving 41 patients in group G and 40 patients in group C.Ten minutes before anesthesia induction,group G received an intravenous dose of 4 μg/kg glycopyrrolate diluted to 5 mL with normal saline.The control group received an equal volume of normal saline.Both groups then received an intravenous infusion of dexmedetomidine at 1 μg/kg over 10 minutes.Heart rate(HR)and mean arterial pressure(MAP)were monitored immediately before infusion of glycopyrrolate/saline(T0),5 min after infusion(T1),10 min after infusion(T2),1 min after tracheal intubation(T3),immediately at skin incision(T4),2 min after pneumoperitoneum(T5),dissociating the cholecyst(T6),and 1 min after tracheal tube drawing(T7).Intraoperative amounts of propofol,rocuronium bromide,sufentanil,remifentanil,oral secretion score,PACU stay time,first postoperative flatus time and the occurrence of perioperative adverse reactions were observed.Results HR at T2,T3,T4,T5,and T6 time points was significantly higher in group G than in group C,while MAP at T1,T2,T3,T4,T5 time points was also significantly higher in group G(P<0.05).HR at T2 time points in Group G was significantly lower than that at T0,while T7 was significantly higher than that at T0 time points.In Group C,HR at T1,T2,T4,T5,and T6 time points was significantly lower than that at T0 time points,while T7 time points was significantly higher than that at T0 time points,with the differences being statistically significant(P<0.05).In Group G,MAP at T1 and T2 time pointswas significantly higher than that at T0,and MAP at T6 was significantly lower than that at T0 time points,and in Group C,MAP at T4,T5 and T6 time points was significantly lower than that at T0 time points,and the differences were all statistically significant(P<0.05);Oral secretion was lower in group G compared to group C,with a significant difference(P<0.05).The incidence of bradycardia was significantly lower in group G compared to group C(P<0.05).The incidence of oral dryness within 24 h postoperatively was higher in group G compared to group C(P<0.05).There were no significant differences of HR at T0,T1,and T7 time points,MAP at T0,T6,and T7 time points between the two groups(P>0.05);There were no significant differences of operation time,propofol usage,sufentanil usage,remifentanil usage,rocuronium bromide usage during operation,rate of atropine use,incidence of intraoperative hypotension,PACU stay time,first postoperative flatus,and nausea vomiting rate between the two groups(P>0.05);No delirium occurred in either group of patients 24 h after the operation.Conclusion Use of glycopyrrolate before anesthesia can be effectively applied to patients undergoing LC,is beneficial in reducing the incidence of bradycardia,maintaining the stability of intraoperative circulation,and has no significant effect on the incidence of postoperative delirium and nausea and vomiting.It is a worthy clinical application.

Objective:To evaluate the relationship between spinal cord cytoplasmic activation/proliferation-associated protein-1 (Caprin-1)-mediated expression of calmodulin-dependent protein kinase Ⅱ alpha(CaMKⅡα) and pain perception in mice.Methods:Nestin CreERT2 mice and Caprin-1 flox/flox mice were hybridized to obtain Nestin CreERT2; Caprin-1 flox/flox homozygous mice. The mice were divided into 2 groups ( n=5 each) using a random number table method: Nestin CreERT2; Caprin-1 flox/floxsolventcontrol group (SC group) and Caprin-1 gene knockout group (KO group). Tamoxifen 100 mg/kg was intraperitoneally injected for 5 consecutive days to generate inducible knockout of the Caprin-1 gene in KO group. The mechanical paw withdrawal threshold was measured at day 1 before and day 5 after the end of administration. Then the mice were sacrificed, and L 4-6 segments of the spinal cord were removed for determination of the expression of Caprin-1 and CaMKⅡα protein and mRNA (by Western blot or real-time quantitative polymerase chain reaction) and co-expression of Caprin-1 with CaMKⅡα (by immunofluorescent double staining). Results:Compared with SC group, the mechanical paw withdrawal threshold was significantly increased at 5 days after the end of tamoxifen administration, the expression of Caprin-1 and CaMKⅡα protein and mRNA was down-regulated ( P<0.05), and the co-localization expression of Caprin-1 and CaMKⅡα in the spinal dorsal horn was down-regulated in KO group. Conclusions:Caprin-1 is involved in the development of pain perception by promoting CaMKⅡα expression.