Objective To investigate the relationship between the diameter of esophageal foreign bodies and the occurrence of complications during endoscopic foreign body retrieval.Methods A retrospective analysis was performed for the case data of patients who received endoscopic treatment at Beijing Tongren Hospital Capital Medical University due to esophageal foreign body from August 2018 to April 2021.Results A total of 425 patients were enrolled,including 93 in the uncomplicated group and 332 in the complications group.The Univariate analysis showed that the long diameter of the foreign body,the jujube seed,there is angulation between the long axis of the foreign body and the long axis of the esophagus,the use of foreign body forceps were the risk factors for complications,and the foreign body blocking in the middle of the esophagus was a protective factor compared with the upper esophagus.Multivariate analysis showed a positive correlation between the diameter of foreign body and the occurrence of complications(OR:3.41,95％CI:2.28-5.11;P＜0.001).Conclusion There is a positive correlation between the diameter of esophageal foreign body and the occurrence of complications.

Cerebellar Purkinje cells (PCs) exhibit two types of discharge activities: simple spike (SS) and complex spike (CS). Previous studies found that noradrenaline (NA) can inhibit CS and bidirectionally regulate SS, but the enhancement of NA on SS is overwhelmed by the strong inhibition of excitatory molecular layer interneurons. However, the mechanism underlying the effect of NA on SS discharge frequency is not clear. Therefore, in the present study, we examined the mechanism underlying the increasing effect of NA on SS firing of PC in mouse cerebellar cortex in vivo and in cerebellar slice by cell-attached and whole-cell recording technique and pharmacological methods. GABA_A receptor was blocked by 100 µmol/L picrotoxin in the whole process. In vivo results showed that NA significantly reduced the number of spikelets of spontaneous CS and enhanced the discharge frequency of SS, but did not affect the discharge frequency of CS. In vitro experiments showed that NA reduced the number of CS spikelets and after hyperpolarization potential (AHP) induced by electrical stimulation, and increased the discharge frequency of SS. NA also reduced the amplitude of excitatory postsynaptic current (EPSC) of parallel fiber (PF)-PC and significantly increased the paired-pulse ratio (PPR). Application of yohimbine, an antagonist of α2-adrenergic receptor (AR), completely eliminated the enhancing effect of NA on SS. The α2-AR agonist, UK14304, also increased the frequency of SS. The β-AR blocker, propranolol, did not affect the effects of NA on PC. These results suggest that in the absence of GABA_A receptors, NA could attenuate the synaptic transmission of climbing fiber (CF)-PC via activating α2-AR, inhibit CS activity and reduce AHP, thus enhancing the SS discharge frequency of PC. This result suggests that NA neurons of locus coeruleus can finely regulate PC signal output by regulating CF-PC synaptic transmission.
Action Potentials/physiology* ; Animals ; Cerebellar Cortex/metabolism* ; Cerebellum/metabolism* ; Mice ; Norepinephrine/pharmacology* ; Purkinje Cells/metabolism* ; Receptors, Adrenergic, alpha-2/metabolism* ; Receptors, GABA-A/metabolism*