Comparison of the protective effect of corneal protectant and balanced salt solution on the ocular surface during minimally invasive vitreous surgery for proliferative diabetic retinopathy / 中华实验眼科杂志

Objective:To compare the protective effect of corneal protectant hydroxypropyl methylcellulose (HPMC) and balanced salt solution (BSS) on corneal epithelium in vitreous body surgery for proliferative diabetic retinopathy (PDR).Methods:A randomized controlled clinical trial was conducted.Fifty eyes of 50 patients with PDR who underwent minimally invasive vitrectomy in Xuzhou First People's Hospital from September 2018 to January 2019 were enrolled and randomly divided into HPMC group and BSS group, with 25 eyes in each group.All eyes underwent three-channel minimally invasive vitrectomy under non-contact wide-angle lens, and 2% HPMC and BSS were applied to keep the ocular surface moist according to grouping during the operation.The combination of cataract surgery, operation time, application times of 2% HPMC or BSS and the grade of corneal epithelial edema before and after operation were recorded.The patients were followed up for 1 month.Corneal fluorescein sodium staining and tear film break-up time (BUT) test were performed before operation and at 1 day, 3 days, 10 days and 1 month after operation.Schirmer Ⅰ test (SⅠt) and ocular surface disease index (OSDI) questionnaire were carried out before operation and at 1 month after operation.The study protocol adhered to the Declaration of Helsinki and was approved by an Ethics Committee of Xuzhou First People's Hospital (No.xyyⅡ[2018]005). Written informed consent was obtained from each patient prior to any medical examination.Results:The average frequency of application of eye drops in the HPMC group was (5.00±1.56) times, which was significantly less than (50.56±17.00) times in the BSS group ( t=-13.071, P<0.01). The postoperative corneal edema score of the HPMC group was 1.0 (1.0, 1.0) point, which was lower than 2.0 (2.0, 2.0) points of BSS group, and the difference was statistically significant ( Z=-4.909, P<0.01). There were statistically significant differences in postoperative corneal fluorescein sodium scores among 1 day, 3 days, 10 days and 1 month in the two groups (HPMC group: χ2=36.040, P<0.01; BSS group: χ2=50.892, P<0.01). The 1-, 3- and 10-day postoperative corneal fluorescein sodium scores in the HPMC group were significantly lower than those in the BSS group (all at P<0.05). One-day, 3-day, 10-day and 1-month postoperative BUT values were (6.15±2.20), (6.95±2.46), (6.16±2.11) and (5.81±2.92) seconds in the HPMC group, respectively, and were (3.89±1.87), (5.32±2.59), (5.01±2.12) and (4.97±2.10) seconds in the BSS group, respectively.There were significant differences in BUT between the two groups at different time points ( Fgroup=5.240, P<0.05; Ftime=2.846, P<0.05). The preoperative and 1-month postoperative SⅠt values in the BSS group were (12.24±5.55)mm and (9.96±4.53)mm, respectively, showing a statistically significant difference ( t=3.863, P=0.001). The postoperative OSDI score in the BSS group was (51.00±12.04) points, which was significantly higherly than the preoperative value of (47.89±10.95) points, and the difference was statistically significant ( t=-2.111, P<0.05). Conclusions:Compared with BSS, 2% HPMC in minimally invasive vitreous surgery has better protective effect on corneal epithelium of PDR, reduces the frequency of eye drop use during the surgery and shortens the repair time of ocular surface tissue after surgery.

Development of a new protocol for freeze-drying preservation of Pseudoalteromonas nigrifaciens and its protective effect on other marine bacteria

Background: Freeze-drying is known as one of the best methods to preserve bacterial strains. Protectant is the key factor affecting the survival rate of freeze-dried strains. In addition, salinity, bacterial suspension concentration, drying time, and other factors can also affect the survival rate of strains to varying degrees. At present, there are relatively few studies on freeze-drying preservation of marine bacteria. In the present study, we performed the freeze-drying protectant screening and optimized the preservation conditions for Pseudoalteromonas nigrifaciens, which is widely distributed in marine environment. The protective effects of the screened protectants were verified by 18 other marine bacterial strains. Results: The results indicated that the combination of 5.0% (w/v) lactose, 5.0% (w/v) mannitol, 5.0% (w/v) trehalose, 10.0% (w/v) skim milk powder, 0.5% (w/v) ascorbic acid and 0.5% (w/v) gelatin was the best choice for the preservation of P. nigrifaciens. The suggested salinity and concentration of initial cell suspension were 10 g/L NaCl and 1.0 × 109 CFU/mL, respectively. Furthermore, stationary-phase cells were the best choice for the freeze-drying process. The highest survival rate of P. nigrifaciens reached 52.8% when using 5­10% (w/v) skim milk as rehydration medium. Moreover, the other 18 marine strains belonging to Pseudoalteromonas, Vibrio, Photobacterium, Planomicrobium, Edwardsiella, Enterococcus, Bacillus, and Saccharomyces were freezedried under the abovementioned conditions. Their survival rates were 2.3­95.1%. Conclusion: Collectively, our results supported that the protectant mixture and parameters were beneficial for lyophilization of marine bacteria

Comparison of Efficacy Between Pantoprazole and Gefarnate in Treating Upper Gastrointestinal Bleeding Caused by Post-PCI Dual Anti-platelet Therapy / 中国微创外科杂志

Objective To investigate the effect of pantoprazole (proton pump inhibitor, PPI) and gefarnate (gastric mucosa protectant) on the prevention of upper gastrointestinal bleeding in patients undergoing post-percutaneous coronary intervention (PCI) dual anti-platelet therapy.Methods This research included 1263 patients taking enteric aspirin and clopidogrel after PCI.The cases were divided into 4 groups: routine treatment group (n=332), PPI group (n=318), gastric mucosa protectant group (n=299), and PPI+gastric mucosa protectant group (n=314).A follow-up for 6 months was observed including gastrointestinal symptoms, upper gastrointestinal bleeding, major adverse cardiac events (MACE), and adverse reactions.Results There were 52 cases of upper gastrointestinal bleeding within 6 months, including 21 cases from routine treatment group, 9 from PPI group, 15 from gastric mucosa protectant group, and 7 from PPI+gastric mucosa protectant group.The incidence of upper gastrointestinal bleeding among the 4 groups within 6 months was statistically different (X2=8.883, P=0.031).The routine treatment group had significant higher rate than the PPI group and the gastric mucosa protectant group (P0.05).The upper gastrointestinal bleeding occurred within 3 postoperative months in 34 out of 52 cases (65.4%).There was no statistical significance among the four groups in regard to bleeding occurrence time (X2=4.212,P=0.648).Conclusions Patients undergoing post-PCI dual anti-platelet treatment can reduce the incidence of gastrointestinal bleeding by taking pantoprazole or combined with gefarnate.Intervention against upper gastrointestinal bleeding should start on the first day after PCI and last for a minimum of 3-6 months.

Determination and evaluation of antacid property of alkaline montmorillonite / 中国药学杂志

OBJECTIVE: To investigate and evaluate the antacid property of alkaline montmorillonite. METHODS: Parameters of the antacid, such as active component content, solubility, and granularity, were determined. The antacid was characterized by BET, XRD, and SEM, and evaluated by acute toxicity test, acid resistance in vitro experiment, and gastric mucosa protection experiment. RESULTS: The content and solubility of the active component Ca(OH)2 were 37% and 84 mg · L-1, respectively, which showed that Ca(OH)2 was relatively firmly loaded and the alkalinity was largely decreased. The granularity and specific area were 8.3 μm and 37.5 m · g-1, respectively, which were beneficial to gastric acid adsorption and gastric mucosa protection. Besides, XRD characterization results revealed the antacid retained a structure of montmorillonite. And SEM patterns indicated the surface of the antacid was relatively smooth, which was conducive to gastric mucosa protection. In addition, the results of acute toxicity test, acid resistance in vitro experiment, and gastric mucosa protection experiment demonstrated that the antacid was safe and non-toxic. Meanwhile, it pocessed excellent properties of acid resistance and gastric mucosa protection. CONCLUSION: Alkaline montmorillonite antacid is an excellent antacid and gastric mucosa protectant.

Prophylactic application of hepatic protectants in anti-TB treatment of AIDS patients / 中国药学杂志

OBJECTIVE: To observe the prophylactic effect of hepatic protectants in the anti-TB treatment of acquired im-mund deficiency syndrome patients. METHODS: Cases from 2008 through 2013 with or without hepatic protectants were analysed to compare the changes in transaminase. RESULTS: Patients with hepatic protectants showed a 26.9% of rate of hepatic injury, while those without hepatic protectants showed a 37.9% of rate of hepatic injury. CONCLUSION: Prophylactic application of hepatic protectants can decrease the occurrence of hepatic injury during the anti-TB treatment of AIDS patients.

Application effect of skin protectant for the patients with incontinence and its correlated influencing factors / 中国实用护理杂志

Objective The study is to investigate the effects of skin protectant carried out among the patients with incontinence,analyze the risk factors and protective factors of the occurrence of incontinence-associated dermatitis,and provide effective preventive measures for clinic.Methods From May 2013 to January 2014,174 cases of high-risk patients with incontinence from care units of intensive care unit,neurology intensive care unit,neurosurgery intensive care unit,and emergency intensive care unit of a top three hospital of Nantong were divided into three groups and provided with preventive interventions of skin protectant.Group A used ostomy skin care powder,group B used tannic acid ointment,and group C used Comfeel skin protective film.The incidence rate and time to onset of incontinence-associated dermatitis were compared,and then the relevant factors which might cause the occurrence of incontinence-associated dermatitis underwent Logistic regression analysis.Results 32 cases (18.4％) of patients after application of skin protectants occurred incontinence-associated dermatitis.The incidence rate of IAD in the three experiment groups (group A,group B and group C) were 30.4％,10.3％ and 15.0％.The incidence rate of IAD was the lowest in group B,followed by group C and group A.There was a significant difference among the three groups.In the comparison pair match,the differences of incidence rate between group A and group B,group A and group C were statistically significant,but the incidence rate of group B and group C was statistically insignificant.Mean time to onset of incontinence-associated dermatitis was (7.00± 3.91) days.The occurrence time of IAD among the three groups was not statistically significant.Conclusions In the process of incontinence care,it should be given as early as possible to clean the peri-anal skin and apply skin protectant with better preventive effects.