Acid-sensing ion channel 1a in the central nucleus of the amygdala regulates anxiety-like behaviors in a mouse model of acute pain

Pain is commonly comorbid with anxiety; however, the neural and molecular mechanisms underlying the comorbid anxiety symptoms in pain (CASP) have not been fully elucidated. In this study, we explored the role of acid-sensing ion channel 1a (ASIC1a), located in GABAergic neurons from the central nucleus of the amygdala (GABA^CeA), in the regulation of CASP in an acute pain mouse model. We found that the mice displayed significant mechanical pain sensitization and anxiety-like behaviors one day post injection of complete Freud's adjuvant (CFA1D). Electrophysiological recordings from acute brain slices showed that the activity of GABA^CeA neurons increased in the CFA1D mice compared with that in the saline mice. In addition, chemogenetic inhibition of GABA^CeA neurons relieved mechanical pain sensitization and anxiety-like behaviors in the CFA1D mice. Interestingly, through pharmacological inhibition and genetic knockdown of ASIC1a in the central nucleus amygdala, we found that downregulation of ASIC1a relieved the hypersensitization of mechanical stimuli and alleviated anxiety-related behaviors, accompanied with reversing the hyperactivity of GABA^CeA neurons in the CFA 1D mice. In conclusion, our results provide novel insights that ASIC1a in GABA^CeA neurons regulates anxiety-like behaviors in a mouse model of acute pain.

[Analysis of the incidence and reasons of the same-day cancellation of non-cataract ophthalmic ambulatory surgery]

Objective: To investigate the incidence and reasons of the same-day cancellation of non-cataract ophthalmic ambulatory surgery, and to provide a basis for further improvement of the medical quality of ophthalmic ambulatory surgery. Methods: The data of the appointment for ophthalmic ambulatory surgeries from December 1, 2020 to November 30, 2021, including the patient's general condition, disease diagnosis, proposed surgical arrangement, anesthesia method and the completion of the surgeries, were collected through the electronic medical record management system in Beijing Tongren Hospital, Capital Medical University. The total number and incidence of cancelled surgeries registered in the surgical center were analyzed, the incidence of cancelled surgeries of different ages, sexes, subspecialty surgical types, anesthesia methods, patient sources were analyzed, and the reasons for surgical cancellation were further analyzed. Results: A total of 10, 595 non-cataract ophthalmic day surgeries were applied, of which 827 were temporarily cancelled on the day of surgery, with a cancellation rate of 7.8%. The difference in the same-day surgery cancellation rate at different ages was statistically significant (P<0.001), of which the surgery cancellation rate in toddler and infants was the lowest, which was 2.1% (23/1 110) and 3.4% (2/59), respectively, while the surgery cancellation rate was the highest in elderly patients over 75 years old, at 10.4% (48/462). There was a statistically significant difference in surgical cancellation rates among different sub-specialties (P<0.001), with the lowest surgical cancellation rate in the tumor sub-specialty at 4.5% (33/732), while the corneal sub-specialty had the highest surgical cancellation rate at 14.3% (40/280), followed by the plastic sub-specialty with 11.8% (153/1 297). There were no statistically significant differences in the rate of surgical cancellation between different sexes, anesthesia methods or patients' home address (all P>0.05). The most common reason for same-day surgery cancellation was the absence of the patient on the day of surgery (49.7%, 479/827), followed by changes in the patient's general condition (18.4%, 152/827), and inadequate preoperative preparation (6.0%, 50/827). 64.3% (532/827) of the same-day surgical cancellations were considered to have been avoided by enhancing preoperative communication, consultation and management. Conclusions: The same-day cancellation rate of ambulatory surgery in non-cataract ophthalmology is 7.8%, of which the cancellation rate in elderly patients and in less invasive surgery are higher. The absence of the patient on the same day and the change of the patient's condition are the main reasons for the cancellation of surgery on the same day, and most of them are avoidable.

[Preoperative video distraction alleviates separation anxiety and improves induction compliance of preschool children: a randomized controlled clinical trial]

Objective: To explore the effect of video distraction on preoperative separation anxiety and induction compliance of preschool children receiving strabismus surgery under general anesthesia. Methods: In this prospective trial, 80 children aged 3 to 6 years scheduled for strabismus surgery under inhalation anesthesia were randomly allocated to one of two groups, a control group and a video distraction group, with 40 cases in each group. Children in the video distraction group continuously watched videos from waiting in the holding area, separating with parents, entering the operating room and induction of anesthesia, while children in the control group didn't watch videos during the same process. The modified Yale Preoperative Anxiety Scale (mYPAS) of children were recorded upon arriving at the holding area(T₁)and separating with parents(T₂). Induction Compliance Checklist (ICC) score was recorded when the anesthesia induction was performed. The emergence time, the occurrence rate of adverse events in post-anesthesia care unit (PACU) including nausea and vomiting, laryngospasm, severe cough, hypoxemia and sinus bradycardia, incidence of postoperative adverse reactions such as pain, dizziness, nausea and vomiting and lethargy, the parents' satisfaction of anesthesia were also assessed. Results: There were no significant difference in mYPAS score and the proportion of mYPAS score>30 between 2 groups at T₁ (all P>0.05). At T₂, the mYPAS score and the proportion of mYPAS score>30 in video distraction group were (34.41±13.23) and 52.50%, which were lower than those in control group (50.64±20.96, 87.50%) with statistically significant difference (all P<0.05). The ICC score of video distraction group was lower than that of the control group, which was (1.83±2.26) vs (4.03±2.99), and the difference was statistically significant (P<0.05). The proportion of children with ICC score=0 in video distraction group was 37.50%, which was higher than that in the control group (12.50%), while the proportion of children with ICC score=4-10 was lower than that of the control group, which was 17.50% vs 45.00%, and the difference was statistically significant (P<0.05). No significant intergroup differences were observed in emergence time, incidence of adverse events in PACU, and incidence of postoperative adverse reactions (P>0.05). The parents' satisfaction of anesthesia in the video distraction group was (9.23±0.89), which was higher than that in the control group (8.63±1.23), with statistically significant (P<0.05). Conclusion: Preoperative video distraction alleviates separation anxiety, improves induction compliance of preschool children receiving strabismus surgery under general anesthesia, and increases the parents' satisfaction of anesthesia.