Views on Key Technical Problems in Research and Development of Famous Classical Formulas / 中国实验方剂学杂志

In this paper， the key technical problems in the research and development of famous classical formulas are analyzed. Firstly， the puzzled problem for a long-time， which is conversion relationship from medicinal metrology of Han dynasty （HD） to that of modern （gram，g）， is comprehensively expounded that one Liang （两） of HD=3 g is more appropriate. Secondly， the model and principles of quality consistency evaluation are given for the transformation from the quality of authoritative basic sample prepared by casserole （ABS-C） to the quality consistency in Laboratory process， pilot-scale process and industrial production. The consistency evaluation model is ξABS-X=K1（Q1ABS-X/Q1ABS-C）+K2（Q2ABS-X/Q2ABS-C）+……+Ki（QiABS-X/QiABS-C）=∑Ki（QiABS-X/QiABS-C）（i=1，2，3……n）. In the formula， ABS-X means laboratory reference sample ABS-C （ABS-L）， pilot-scale ABS-C （ABS-mP） or industrial production ABS-C （ABS-P）， ξABS-X means the quality consistency rate or similarity degree of ABS-L， ABS-mP and ABS-P processes with ABS-C， Ki means the weight of each quality evaluation index （i）， QiABS-X is the data of i in ABS-L， ABS-mP， ABS-P samples， and QiABS-C is the data （or mean） of i in ABS-C sample. Thirdly， in order to control the quality of the herbal medicines whose active ingredients were unknown， their chemical constituents should be studied deeply， and if necessary， the bioassay research should be carried out according to the main efficacy or indication of famous classical formulas. Finally， for the special processing of some herbal medicines， it is difficult to formulate the processing method， technology and standard of prepared slices. It is suggested that the scientific connotation and historical evolution of the special processing method should be thoroughly sorted out， and its technological characteristics are summarized， the modern processing technology and production processes are simulated， and then the corresponding processing methods and quality standards are formulated.

The measurement method of gamma ray air absorbed dose rate based on LaBr3(Ce) detector / 中国辐射卫生

Objective Based on the lanthanum bromide scintillator detector, the calculation method of G(E) function was developed to measure the air absorbed dose rate. Methods Firstly, the gamma energy spectrumof the lanthanum bromide detector were simulated and the response functions with different energies were determined with Monte Carlo simulation method. Then, the G(E) function was calculated by the least square method. Finally, the air absorbed dose rate measured by the lanthanum bromide detector using G(E) function conversion method was compared with the theoretical calculation value based on the point source experiments. Results The experimental verification results showed that the relative deviation between thecalculated value with G(E) function and the theoretical calculation value wasmostly controlled within ± 6%, which verified the accuracy of G(E) function. Conclusion The results showed that the method of G(E) function could be applied to calculate the gamma radiation dose rate based on the in-situ the gamma spectrum with LaBr3 detector.

Textual Research on Ancient and Modern Literature of Xiao Chengqitang / 中国实验方剂学杂志

Xiao chengqitang is recorded in Treatise on Febrile Diseases written by ZHANG Zhong-jing in the Eastern Han dynasty. It is composed of Rhei Radix et Rhizoma， Magnoliae Officinalis Cortex and Aurantii Fructus Immaturus， which is mainly used to treat mild exogenous Yangming Fu-viscera excess syndrome. This formula has been included in the Catalogue of Ancient Classical Prescription （The First Batch）. However， the processing specifications and doses recorded in the original formula are different from the modern usage， which results in some difficulties in the research and development of Xiao Chengqitang granules. For clarifying the key information， such as historical evolution of prescription， dose conversion， the origin and processing specifications of each medicine in the prescription， the paper systematically analyzes the ancient medical books and related literature in the past dynasties and refers to the life experience of ZHANG Zhong-jing. Then the modern prescription and decocting methods of Xiao Chengqitang were determined as follows：composing 55.2 g of Rhei Radix et Rhizoma （Rheum officinale） washed with wine， 27.6 g of Magnoliae Officinalis Cortex （Magnolia officinalis） processed with ginger and 39.0 g of stir-fried Aurantii Fructus Immaturus （Citrus aurantium）， adding 800 mL of water， decocting to 240 mL and filtrating.

Validation of Dose Conversion of Banxia Houpotang Based on Systematic Evaluation / 中国实验方剂学杂志

There are many different opinions on dose conversion of famous classical formulas from Treatise on Febrile Diseases or Synopsis of the Golden Chamber, which has become a difficult point in research and development of famous classical formulas. At present, the clinical application dose of Banxia Houpotang is similar to the viewpoint that 1 Liang is equivalent to 3 g, in order to provide scientific basis for this conversion method, this paper systematically evaluated the effectiveness of Banxia Houpotang in intervening globus hystericus. Randomized controlled trials (RCTs) of Banxia Houpotang in intervening globus hystericus from CNKI, VIP, Wanfang Data, China Biology Medicine (CBM), Web of Science and PubMed databases were collected online, the retrieval time was from inception to April 1, 2019. Two reviewers independently screened the literature, extracted the data and assessed the risk of bias of the included studies. Then, Meta analysis was performed by RevMan 5.3 software. A total of 17 RCTs involving 1 575 patients were included. The effective rate [relative risk (RR)=1.24, 95%confidence interval (CI) (1.18, 1.30), P<0.000 01] and the curative rate [RR=1.76, 95%CI (1.45, 2.15), P<0.000 01] of Banxia Houpotang in intervening globus hystericus were all better than the control group. Current evidence shows that Banxia Houpotang under the conversion of 3 g in 1 Liang has a significant effect on intervention of globus hystericus. Due to the limitations of quantity and quality of the included studies, the above conclusions need to be verified by more high-quality studies, but the author suggests that such dose conversion should be considered in the research and development of famous classical formulas.

Estimation of patient radiation doses form conventional X-ray radiography / 中华放射医学与防护杂志

Objective To compare patient organ doses and entrance surface dose conversion coefficients in conventional radiography using medical internal radiation dose (MIRD) phantom and voxel human phantom.Methods The voxel phantom was adapted to the Monte Carlo transport code to simulate the organ doses and entrance surface dose in five common projections, and thus the dose conversion coefficients between the entrance skin dose and organ dose were calculated.The results were compared with the reported mean values which were simulated using MIRD phantom.Results The dose conversion coefficients values of organs covered or partially covered by the X-ray field ranged from 0.149-0.650 in chest postero-anterior projection, 0.067-0.382 in chest left lateral projection, 0.023-0.374 in chest right lateral projection, 0.035-0.431 in abdominal antero-posterior projection, 0.083-0.432 in lumbar spine antero-posterior projection.In chest postero-anterior projection, significant differences were most obviously observed in lung, the dose conversion coefficients difference was 54.3％.In chest left lateral projection, the dose conversion coefficients difference of liver was greatest, which was 54.5％.In chest right lateral projection, the dose conversion coefficients differences of stomach wall was most obviously 63.8％.In abdominal antero-posterior projection, dose conversion coefficients discrepancy was most obviously observed in spleen, with the value of 65.0％;while in lumbar spine antero-posterior projection, the dose conversion coefficients differences of stomach wall was most obviously 43.7％.Conclusions Compared with the stylized MIRD phantoms, the anatomical realism in voxel phantom is evident.Therefore, the dose conversion coefficients calculated by voxel phantoms are more accurate and scientific in conventional radiology.

How to Choose Drug Dosage for Human Experiments Based on Drug Dose Used on Animal Experiments: A Review.

The orthodontic tooth movement is a biological response to orthodontic force. The biological response is very strongly-related to local bone metabolism. There is a strong evidence in the literature that bone metabolism can be altered by drugs. There are various studies published in dental journals on administration of drugs for the purpose of affecting orthodontic tooth movement both for augmentation of anchorage and to increase the rate of tooth movement. Most of these studies are animal studies. The aim of this article is to give insight to how to convert drug dose from animal studies to human trails. Dose per kilogram of body weight for one species is not the same for another species, it has to be converted first based on body surface area (BSA)normalization method. BSA correlates well across several mammalian species with several parameters of biology, including oxygen utilization, caloric expenditure, basal metabolism, blood volume, circulating plasma proteins, and renal function.

Dose conversion ratio for continuous intravenous infusion of fentanyl and fentanyl transdermal patches (reservoir-type)

Objectives: At present, the dose conversion ratio for a continuous intravenous infusion of fentanyl (CIV) and fentanyl transdermal patches (TP), which are widely used in Japan, is not based on the results of clinical studies in Japanese patients. Studies comparing serum fentanyl concentrations in patients with cancer pain treated by TP showed large differences between Japanese patients and those in other countries. We therefore studied the dose conversion ratio in Japanese patients. Methods: From October 2003 through October 2008, we extracted information on all patients with gastrointestinal cancer who underwent rotation from CIV to TP in the gastrointestinal ward of Kitasato University East Hospital. We selected patients in whom the daily dose of CIV or TP (i.e., the basic dose) was unchanged for 10 days after rotation and the difference in the number of rescue doses (per day) as compared with immediately before rotation was 1 or less on at least 3 consecutive days. All TP preparations used in this study were reservoir-type. Regression lines were plotted on the basis of the relation of “the basic released dose of TP” to “the basic prescribed dose of CIV,” and the dose conversion ratio was calculated. Results: 47 patients underwent opioid rotation, and 11 of them satisfied the eligibility criteria. Eleven patients were studied. The following regression equation was obtained: Y=1.0227X+1.0103, r²=0.9188, indicating a strong correlation. The dose conversion ratio of CIV to TP (released dose) derived by regression analysis was 1:1. Conclusions: Our results obtained in Japanese patients will allow dose conversion at the time of opioid rotation from CIV to TP to be more appropriately performed.