ObjectiveTo evaluate the security of intravitreal injection with ciproflaxacin to retina.MethodsTweenty-four rabbits were randomly divided into 4 groups with 6 rabbits in each group. 0.1 ml ciproflaxacin in doses of 2 500,5 000,and 10 000 μg was intravitreally injected into the rabbits eyes, retrospectively. And 0.1 ml saline solution was injected into the vitreous body of the rats in the control group. Indirect microscope, light microscope and electroretinogram (ERG) were used to observe the changes of ocular fundus.ResultsNormal results of light microscopy and ultrastructure were found in 250 μg and 500 μg groups; irregularly arranged outer and inner nuclear layers, dropsical or even lost ganglion cells, and ultrastructural changes were in 1 000 μg group. There was no apparent difference of ERG′s a and b amplitudes before and after intravitreal injection with ciproflaxacin in each group.ConclusionIntravitreal injection with ciproflaxacin is safe, and 500 μg or less is the secure dosage in rabbits' eyes. (Chin J Ocul Fundus Dis, 2005,21:180-182)
A controversy still exists in the management of nerve injection injury. The results of different timing of operation and methods in treating this type of nerve injury were analysed in limb s function, neuroelectrophysiology and histology. The results showed that the recovery of the injuried nerve in the group of operation, was considerably better than that in the group without operation. In the group of operation early incision of the epineurium with saline irrigation! was superior to late neurolysis. It was suggested that the early incision with saline irrigation could be used as an emergency management for this type of nerve injury.
To review the advance in the experimental studies and evaluate the potential therapeutic appl ication of the growth differentiation factor 5(GDF-5) and osteogenic protein 1 (OP-1) in intervertebral disc degeneration.Methods Relevant l iterature at home and abroad publ ished in recent years was searched and analyzedcomprehensively. Results The growth factor was one of the most potential proteins in curing the intervertebral discdegeneration. In vitro, exogenous GDF-5 or OP-1 increased the deoxyribonucleic acid and proteoglycan contents ofboth nucleus pulposus and annlus fibrosis cells types significantly. GDF-5 at 200 ng/mL or OP-1 significantly stimulatedproteoglycan synthesis and collagen synthesis. In vivo, the injection of GDF-5(100 μg) or OP-1(100 μg in 10 μL 5% lactose) resulted in a restoration of disc height, improvement of magnetic resonance imaging scores, and histologic grading scores had statistical significance. Conclusion A single injection of GDF-5 or OP-1 has a reparative capacity on intervertebral discs, presumably based on its effect to stimulate matrix metabol ism of intervertebral disc cells and enhance extracellular matrix production. A single injection of exogenous GDF-5 or OP-1 in the degenerated disc shows a good prospect.
Objective To evaluate the safety and efficacy of botulinum toxin type A injection around internal anal sphincter and sector resection combined with epluchage and drainage by a small incision in treatment for stage Ⅱ and Ⅲ anal fissure，explore its surgical procedures and key points，and introduce a new surgical treatment for anal fissure. Methods The patients according to the inclusive criteria were divided into trial group and control group in randomized，parallel，controlled clinical trial method．The botulinum toxin type A injection around internal anal sphincter and sector resection combined with epluchage and drainage by a small incision was performed in the trial group, the anal fissure resection and part internal anal sphinctor latero-resection was perfermed in the control group. The safety index （including anal stenosis，incontinence，acute urinary retention，postoperative pain，and rectal anal tube pressure） and validity indicators （including cure rate，operation time，wound healing，wound healing grade，and scar size） were compared before and after operation between two groups．Results No anal stenosis and acute urinary retention occurred in the two groups. The anal incontinence score was not significantly different between two groups （P＞0.05）．The postoperative pain score in the trial group was significantly lower than that in the control group （24 h，the first defecation，and on week one after operation，all P＜0.01）．The difference of rectal anal canal pressure was not statistically significant between two groups （P＞0.05）．The cure rate was higher （P＜0.05），operation time and wound healing time were shorter （P＜0.01），wound healing was better （P＜0.05），scar area was smaller （P＜0.01） in the trial group as compared with the control group．Conclusions Comparing with the control group，high cure rate，short wound healing time，small size of scar，short operation time and minimal invasion are seen in the trial group．The shape and function of the anus are better reserved than that of the control group，this technique has a good clinical efficacy and safety．
ObjectiveTo observe the effects of bulbar subconjunctival and periocular injection of dexamethasonone on blood glucose levels of type 1 diabetic mellitus (T1DM)rats. Methods80 healthy adult male Sprague-Dawley rats were randomly divided into GroupⅠ(n=40) and GroupⅡ(n=40). GroupⅠrats received intraperitoneal (IP) injection of streptozotocin to induce T1DM model, while GroupⅡrats received IP injection of citrate buffer solution and was the control group.GroupⅠrats and GroupⅡrats were further divided into four subgroups:A (n=10), a (n=10), B (n=10), and b (n=10). Subgroup-A rats received bulbar subconjunctival injection of dexamethasone, subgroup-a rats received bulbar subconjunctival injection of saline, subgroup-B rats received periocular injection of dexamethasone, subgroup-b rats received periocular injection of saline. After the injection, rats were fasted but could drink water. Tail vein blood samples were collected and the blood glucose level was measured by glucose monitor. ResultsAfter modeling, the blood glucose level of GroupⅠand GroupⅡrats was(9.31±1.79) mmol/L and (5.72±0.80) mmol/L respectively, the difference was statistically significant (P < 0.05). The blood glucose level of GroupⅠrats reached the peak in 3h after injection. In 6-24 h after injection, the blood glucose level of GroupⅠA rats was obviously increased than that of the blood glucose level of Group Ia rats and the difference was statistically significant (P < 0.05). In 3-24 hours after injection, the blood glucose level of GroupⅠB rats was obviously increased than that of the blood glucose level of GroupⅠb rats and the difference was statistically significant (P < 0.05). Comparing the blood glucose level during different injection time between GroupⅠA rats and GroupⅠB rats, between GroupⅠa rats and GroupⅠb rats, the difference was not statistically significant (P > 0.05). In 3-24 hours after injection, the blood glucose level of GroupⅡA rats was obviously increased than that of the blood glucose level of GroupⅡa rats and the difference was statistically significant (P < 0.05); the blood glucose level of GroupⅡB rats was obviously increased than that of the blood glucose level of GroupⅡb rats and the difference was statistically significant (P < 0.05). Comparing the blood glucose level during different injection time between GroupⅡA rats and GroupⅡB rats, between GroupⅡa rats and GroupⅡb rats, the difference was not statistically significant (P > 0.05). ConclusionBulbar subconjunctival injection and periocular injection of dexamethasone could both increase the blood glucose of TIDM rats, but these two injection methods had no differences on the blood glucose level.
As a relatively novel technique for drug delivery, the needle-free injection technique is characterized by transporting the drug liquid to the designated subcutaneous position through a high-speed micro-jet. Although this technique has been applied in many fields, the research on its drug dispersion mechanism and injection performance is insufficient. The presented study aims to identify critical parameters during the injection process and describe their influence on the injection effect. The injection completion rate and performance of a needle-free injector under various operating conditions were compared based on mouse experiments. The results show that the nozzle diameter imposes a more significant influence on jet characteristics than other injection parameters. Moreover, the injection completion rate increases with the nozzle diameter. The nozzle diameters of 0.14 mm and 0.25 mm correspond to injection completion rates of 89.7% and 95.8%, respectively. Furthermore, by analyzing the rate of blood glucose change in the tested mice, it is found that insulin administration through the needle-free injection can achieve a drug effect duration longer than 120 min, which is better than that obtained using conventional needle-syringe technique. In summary, the obtained conclusions can provide an important reference for the optimal design and extending application of the air-powered needle-free injector.
From 1986 through Dec. 1991, 305 cases of hemangioma were treated by local injection therapy with a follow-up of 3 to 48 months. The outcome was satisfactory, 278 cases were cured, and 27 cases were still under observation. The preparation of the tetracycline solution, the method of injection, the indications, the way of observation and nursing after injection were introduced, and the mechanism of action of its application, the diagnosis and treatment of the complications were discussed.
Objective To assess the effect of Dengzhanhua Injection for angina pectoris. Methods We performed an electronic search for MEDLINE (1966 to 2004), EMBASE (1974 to 2004), The Cochrane Library (Issue 4, 2004), CBM and CNKI (1980 to 2004). We included randomized controlled trials that met the inclusion and exclusion criteria and evaluated the quality of those trials and performed the meta-analysis by RevMan 4.2.7. Results Eight trials were included involving 634 patients. However, they were of poor quality. The results of meta-analysis indicated that there were statistical difference on symptoms and electrocardiogram (ECG) improvements between Dengzhanhua and control group (Breviscarpine≥30 mg) with RR 1.26, 95%CI 1.11 to 1.44 and RR 1.30, 95%CI 1.14 to 1.49, respectively. However, Dengzhanhua Injection (Breviscarpinelt;30 mg) vs. basic therapy showed no statistical difference in either symptom improvement (RR 1.03, 95%CI was 0.90 to 1.18) or ECG improvement (RR 1.01, 95%CI 0.86 to 1.20). In addition, Dengzhanhua decreased the myocardial infarction attacks in one year following up (OR 0.06, 95%CI 0.01 to 0.29). Conclusions Little evidence shows that Dengzhanhua is superior to simple basic therapy in the symptoms and ECG improvements as an auxiliary drug. However, this systematic review can not draw a conclusion about the effectiveness of Dengzhanhua Injection compared to simple basic therapy in the treatment of angina pectoris due to the poor quantity of included trials.
Objective To explore the serious situation of injection abuse, and its influence to average prescription fee. Methods The subjects of this study were health service settings in rural area of 9 provinces/cities in Midwest of China. The treatment prescription indicators of county and village health service settings were calculated. Results Prescription injection rates of health care facility in rural area of Midwest provinces/cities of China (25.8% to 62.2%,mean: 45.1%) were higher than the standard of WHO (13.4% to 24.1%), and the injection abuse situation was serious. Injection bause caused the increase of prescription fee. Excess usage of injection in health service settings was related to the economic level of the on-site county or village, and also related to the size and load of health service facilities. Conclusion Suggestions are proposed to the government health agency according to the results of the study: enhancing the lawmaking, establishing the related policy and effective measure, training the medical personnel, promoting the mass health education, investigating the effective injection management model in rural area, and reducing the rate of injection.