Objective To conclude the nursing experience in a patient with chronic pyogenic osteomyelitis of the mandible caused by multidrug-resistant bacteria. Methods Through the nursing process of patients, detailing the points of disinfection and isolation management, vacuum sealing drainage (VSD) care, drug therapy, hyperbaric oxygen therapy, strengthening primary care, psychological care of the patients with chronic pyogenic osteomyelitis of the mandible caused by multidrug-resistant bacteria. Results Illness was cured after 24 days in the hospital. Conclusions Through the nursing of a patient with chronic pyogenic osteomyelitis of the mandible caused by multidrug-resistant bacteria, reinforces the basic knowledge of nurses, improve nursing skill, which increases the theoretical basis and practical experience in clinical work.

A method based on gas chromatography-mass spectrometry (GC-MS) was established to analyze the changes of intracellular metabolites and study the toxic mechanisms of different concentrations of particulate matter (PM2.5) effecting the lung tissues in mice.Nasal drip experiments of PM2.5 suspensions (0, 7.5, 20.0, 37.5 g/L) for mice were carried out, and the intracellular metabolites in lung tissues were extracted, pretreated and analyzed.Principal component analysis (PCA) and partial least-squares discriminant analysis (PLS-DA) were employed for pattern recognition, and an obvious distinction among different conditions was found.According to the PLS-DA loading diagram and variable important factor (VIP) value, 7 kinds of potential biomarkers, alanine, valine, leucine, ornithine, fumaric acid, citric acid and purine (p<0.01), were determined with significant differences between four different concentrations of PM2.5.Metabolic pathway analysis indicated that the oxidative stress reactions were enhanced, and the TCA cycle and the purine metabolism in lung cells were restrained after dripping PM2.5 to the lung tissues in mice.This study could provide a new perspective and theoretical basis for the further analysis on toxic mechanisms by PM2.5.

Objective To evaluate the effect of nutritional risk screening and interventions on postoperative nutritional status in patients with oral cancer. Methods A total of 83 oral cancer patients with mild or moderate nutritional risk rated by patient-generated subjective global assessment(PG-SGA) from January 2015 to June 2017 were randomized into an experimental group(43 cases) and a control group (40 cases). The patients in the experimental group received 2-week nutritional intervention before the operation,while the patients in the control group received routine preoperative treatment and diet guidance. The biochemical measurements of postoperative nutritional indicators, peripheral blood immunoglobulin indicators, postoperative complications and hospital stays were compared between the two groups. Results The levels of prealbumin, retinol- binding protein, total lymphocyte count and transferrin were (218.5±34.6) mg/L, (23.5±4.3)μg/L, (1.82±0.45)×109/L, (2.07±0.63 )μg/L on the day of admission in the experimental group, and at 1 day before the operation were (237.3±36.5) mg/L, (27.7±4.8)μg/L, (2.02±0.39)×109/L, (2.43±0.54)μg/L, there was no significant difference(P<0.05). IgM, IgG, IgA at 1 day before the operation were significantly higher than those on the day of admission in the experimental group(P<0.05), and the levels of prealbumin, retinol-binding protein, total lymphocyte count,transferrin, IgM, IgG, IgA and body mass index at 8 days after the operation in the experimental group were significantly higher than those in the control group(t=1.574-3.418, P<0.05). The total rate of postoperative complications was 11.6％(5/43) in the experimental group, 30.0％(12/40) in the control group, and there was significant difference between the two groups (χ2=6.840, P<0.01). The incidence of infection-associated complications such as pneumonia and incision infection was 7.0％(3/43) in the experimental group, 20.0％(8/40) in the control group, and there was significant difference between the two groups (χ2=5.096, P<0.05). Conclusions Preoperative nutritional support can effectively improve the perioperative nutritional status,decrease postoperative complications and operative risk in esophageal cancer patients with mild or moderate nutritional risk.