OBJECTIVE: To establish a method for the simultaneous determination of the contents of salicylic acid and nitrofural in Fu-La pastes.METHODS: A dual-wavelength spectrophotometry was adopted for the determination of the contents of salicylic acid and nitrofural with water used as solvent.The content of salicylic acid was determined with the detective wavelength set at 296.6 nm and the reference wavelength set at 314.4 nm.The content of the nitrofural was determined directly with the detective wavelength set at 375.0 nm.RESULTS: The linear ranges of salicylic acid and nitrofural were 10.77～43.08 ?g?mL-1(r=0.999 0) and 2.58～10.32 ?g?mL-1(r=1.000 0),respectively;and their average recovery rates were 99.55%(RSD=0.47%) and 100.03%(RSD=0.80%),respectively.CONCLUSION: The method is simple,rapid and accurate,and suitable for the quality control of Fu-La pastes.

Humans ; Laryngeal Neoplasms ; surgery ; Laser Therapy ; Wound Healing

OBJECTIVE:To facilitate the hierachical management and use of antibiotics and tighten control on prescription right on the narcotics drugs.METHODS:Hospital informational system has contributed to the informatization management on supervision of the prescriptions of antibiotics and narcotics.RESULTS:After half a year's practice of informatization management,remarkable outcome has achieved in that the practice of hierachical management and use of antibiotics has been improved significantly,and the management on the prescription right of narcotics drugs became more simple and reliable.CONCLUSIONS:Adopting hospital information system to tighten control on the prescriptions of antibiotics and narcotics drugs is a good management model in which various abnormal prescription behaviors can be effectively warned of and guard against from the very beginning.

Objective:To explore the clinical application value of the dual-layer detector spectral CTA in evaluation of brain perfusion impairment in patients with acute ischemic stroke.Methods:Clinical and imaging data of 35 patients with acute ischemic stroke in Weihai Central Hospital from March 2020 to October 2020 were reviewed retrospectively. All patients underwent head and neck spectral CTA examination and dynamic cerebral perfusion CT examination with dual-layer detector spectral CT. The iodine density map and effective atomic number map were reconstructed using CTA data, and the iodine density and effective atomic number, as well as the cerebral blood volume (CBV) and cerebral blood flow (CBF) values of the hypoperfusion area and the contralateral side were measured and compared; the areas of brain hypoperfusion regions were measured. Pearson′s correlation coefficient was used to analyze the correlation between iodine density values and CBV values, iodine density values and CBF values, effective atomic number values and CBV values, effective atomic number values and CBF values, as well as hypoperfusion area shown on CTA images and displayed on CTP-CBF map.Results:Of all the 35 patients, the iodine density value [(0.22±0.07) mg/ml], effective atomic number value (7.38±0.05), CBV value [(1.9±0.7) ml/100 g] and CBF value [(15.1±5.9) ml/(100 g·min)] of the hypoperfusion area were significantly lower than those of the healthy side [iodine density value (0.44±0.10) mg/ml, effective atomic number value (7.52±0.06), CBV value (3.4±0.7) ml/100 g, CBF value (57±27) ml/(100 g·min); t values were -14.7, -14.5, -11.2, -9.7, respectively, all P<0.001]. No significant difference was found between the hypoperfusion area shown on spectral CTA [(2 292±1 393) mm 2] and shown on CTP-CBF map [(2 290±1 359) mm 2] ( t=-0.076, P=0.944). There was a positive correlation between iodine density value and CBV (affected side: r=0.350, P=0.039, healthy side: r=0.551, P=0.001); a positive correlation was also found between effective atomic number value and CBV (affected side: r=0.488, P=0.003, healthy side: r=0.552, P=0.001); and there was a strong positive correlation between the hypoperfusion area on CTA and that on CTP-CBF ( r=0.993, P<0.001). Conclusion:Dual-layer detector spectral CTA can provide the “one-stop” assessement including head and neck vascular evaluation, as well as the hypoperfution area measument, which can be an alternative rapid method for evaluation of patients with acute ischemic stroke.