ABSTRACT
Objective To compare the regulating effect of electrically stimulating different parts of the auri-cle on the cardiac vagus nerve in rats, and to explore the basic neural mechanism. Methods The tragus, concha auriculae and helix of 24 male Sprague-Dawley rats were stimulated at different intensities ( 0-16 mA) and with differ-ent durations ( 0-15 min) and any changes in the heart rate were observed. One week later, the rats were randomized into a tragus injection group, a concha auriculae injection group, a helix injection group and a control group, each of 6. The rats of the first three groups were injected with 2 μL of cholera toxin subunit B conjugate AF555 ( CTB-AF555) at the right auricle, while the control group was injected with the same amount of aseptic phosphate-buffered saline at the right tragus. Five days later, all of the rats were sacrificed and their right superior and inferior ganglia and the whole bulbus medullae were resected to observe the fluorescent labeling sites. Results The rats'heart rate declined with longer and more intense stimulation of the tragus or concha auriculae, but not with stimulation of the he-lix. With stimulation of the same duration, a significant decrease was observed in the heart rate when the tragus and concha auriculae were stimulated at 10, 12, 14 or 16 mA compared with when the helix was stimulated at the same intensities. The heart rate when the concha auriculae was stimulated at 12 mA was significantly slower than when the tragus was stimulated at the same intensity. At identical stimulus intensities, the heart rate slowed significantly more when the tragus was stimulated for 6 to 15 minutes and the concha auriculae for 4 to 15 minutes compared with stimu-lating the helix for the same length of time. And compared with stimulating the tragus for 6 to 10 minutes, the heart rate decreased significantly more when the concha auriculae was stimulated for the same length of time. All of the rats in the tragus and concha auriculae injection groups displayed nerve tracer in their superior and inferior ganglia. In the tragus injection group, CTB-AF555 was observed in the nucleus tractus solitarius ( NTS) of 3 of the 6 rats. In the concha auriculae injection group it was observed in 4 of the 6. In the helix injection group, CTB-AF555 was observed in the nucleus of the spinal tract in 5 of the 6 rats, but no nerve tracer was found in their superior or inferior ganglia or in the NTS. Conclusion Electrical stimulation of the tragus and concha auriculae can regulate the functioning of the cardiac vagus nerve, but stimulating the helix cannot. This is partly because the nerve signals in tragus or concha auriculae stimulation and the cardiac sensory nerve signal are integrated in the inferior ganglion and then analyzed and processed in the bulbar center to monitor the heart.
ABSTRACT
Objective To observe the effect of different doses of octreotide acetate on the clinical efficacy of patients with severe acute pancreatitis (SAP).Methods Ninety patients with SAP were admitted to the Department of First Aid Medicine Second Section of the First Hospital of Jilin University from September 2013 to January 2016, and according to difference in drug doses, they were divided into octreotide small dose, moderate dose and large dose groups, 30 cases in each group. All the three groups were given the basic treatment, and in the mean time octreotide 0.2, 0.3, 0.4 mg respectively was dissolved in 0.9 % sodium chloride 100 mL, then the low, moderate and high dose solutions were intravenously continuously infused by a micro pump into the veins of patients in respective small, medium and large dose groups, once every 12 hours, for a total of 20 days. The times of improvement of clinical symptoms (such as abdominal pain, nausea, vomiting), blood amylase recovery time, hospitalization time and clinical efficacy, the incidence of shock, renal insufficiency and other complications were compared among the three groups.Results With the increase of drug dosage, the symptom improvement time (days) was gradually decreased (5.0±1.2, 3.0±1.2, 2.8±1.2) in small, medium and large dose groups, the recovery time of blood amylase and hospitalization time were the shortest in medium dosage group, less than those in large and small dosage groups [blood amylase recovery time (days): 4.5±1.0 vs. 6.0±1.0, 4.6±1.0, hospitalization time (days) 12.0±1.5 vs. 15.0±1.5, 12.5±1.5], the total effective rate was the highest in the middle dosegroup, higher than those in the large and small dose groups [96.7% (29/30) vs. 93.3% (28/30), 83.3% (25/30)]; the incidence of complications was the highest in the lowdose group, higher than those in the middle and large dose groups [26.67% (8/30) vs. 10.0% (3/30), 13.3% (4/30)].Conclusions When using micro infusion pump for intravenous infusion of octreotide, the efficacy of moderate dose is better than that of small dose, but compared with the efficacy in large dose group, no significant difference is seen.
ABSTRACT
Objective To investigate the clinical liver function protective effect of Shuganning injection for treatment of patients with drug poisoning.Methods One hundred and forty patients with drug poisoning consistent with thecriteria of enrollment into the study were admitted into the Department of Emergency Medicine in the First Hospital of Jilin University-the Eastern Division from January 2015 to August 2016, and they were randomly divided into observation group and control group by the computer generated random numbers, 70 cases in each group. After admission, all the cases were treated with routine treatment including detoxification, removal of toxin, organ protection, symptomatic and supporting treatment, etc. Based on the routine treatment, additionally, Shuganning injection 20 mL+ 10% glucose injection 250 mL, intravenous drip slowly, once a day was given in the observation group; the therapeutic course was 14 days in both groups. The changes of serum glutamic transaminase (ALT), aspartate aminotransferase (AST) and total bilirubin (TBiL) levels were determined before and 7 and 14 days after treatment respectively to evaluate the situation of liver function in the two groups.Results Before treatment, there were no statistical significant differences in the levels of serum ALT, AST and TBil in the two groups (allP > 0.05); with the prolongation of treatment, the above-mentioned indexes of the two groups were gradually reduced, on the 14th day after treatment, they reached the lowest levels, and the degree of decrease in level on the 14th day in the observation group was more significant than that in the control group [ALT (U/L): 32.6±10.8 vs. 98.3±34.5, AST (U/L): 39.4±14.3 vs. 138.5±25.6, TBil (μmol/L): 4.8±1.7 vs. 13.2±2.3, allP < 0.05].Conclusion Shuganning injection has a protective effect on liver function in patients with drug poisoning.