A retest of 30 deaf children(58 ears) being trained in our centre who used hearing aids for at least half a year showed that two children(2 ears) suffered from hearing loss. To inquire into the cause of hearing loss, we analysed the frequency,range,gain,SSPL 90. volume control of the hearing aids worn by the children as well as the auditory training habits if the deaf children's parents and teachers,compared the children's hearing before and after using the hearing aids and pointed out the possible reasons that caused the children's hearing loss. Here.We sum up the aspects that should be paid attention to when testing and selecting hearing aids for deaf children.

Objective To investigate the relationship of diet habits and health consciousness with essential hypertension in the rural residents of different economic levels in Hebei Province. Methods Cases aged 35-year old and over from Jizhou,Hebei province were selected by means of random stratified sampling in different economic levels. Results The crude prevalence rates were 44.93% in lower economic level and 36.55% in higher economic level. There were significant differences in prevalence rates of hypertension between the different economic levels(?2=31.846,P

Objective To explore the difference of the risk factors among the rural residents with hypertension with different social economic levels.Methods Risk factors survey were conducted in 469 new cases with hypertension(aged over 35) with different economic-social levels in Jizhou city,Hebei province using self-made questionnaire,2799 people(aged over 35) as the controls.The results were analyzed with Logistic regression analysis.Results OR of the risk factors in higher economic level group were:family history of hypertension(2.863),body mass index(BMI,1.286),preserved foods(1.263),the amount of eggs taken daily(1.200) and the ages of the patients(1.052).The OR of risk factors in lower economic levels' group were:family history of hypertension(3.990),smoking(1.767),the amount of eggs taken daily(1.753),drinking(1.728),education background(1.532),sex(1.448),daily amount of meat intake(1.276),BMI(1.205) and the age of the patients(1.068).The higher annual income of the family and the amount of fresh fruits intake daily were the protective factors of hypertension with the OR were 0.708 and 0.788 respectively.Conclusion The results show that the patients at different economic levels have different risk factors of hypertension.

This study was aimed to search anti-platelet aggregation effectors from Gardenia jasminoides extract with the employment of platelet affinity extraction method coupled with HPLC, in order to provide pharmacological experi-mental evidences of the selected effectors to verify its feasibility. Under physiological conditions, washed rat platelets were added into G. jasminoides extract and then a mixture was gained. Consequently, some components from G. jas-minoides extract were combined to the platelets in the mixture while some were not owing to their special chemical structures and properties. Firstly, the uncombined components were washed off from the mixture. Secondly, the com-bined components in the leftover was washed down and collected, respectively, right after destroying the occupied platelets' structures. Thirdly, different collected eluents were analyzed, respectively, by HPLC established in the pre-vious work to search the effectors. Fourthly, pharmacological experiments were implemented for confirmation. The re-sults showed that dominant effective components from G. jasminoides extract acting on anti-platelet aggregation were identified as geniposide. Further evident was provided as well by pharmacological experiment that geniposide exhibit-ed significant inhibitory effect on anti-platelet aggregation in rats induced by ADP, rat tail collagen and thrombin(P< 0.01). It was concluded that the platelet affinity extraction-HPLC method proposed in this paper can be utilized to analyze the correlation of effectors from G. jasminoides extract and its pharmacological effects. Moreover, there are some correlations between screened chemical substances and their pharmacological effects.

OBJECTIVETo develop a GC-FID method for the determination of borneol concentration in rat plasma and to investigate the pharmacokinetics after injection of novel-Xingnaojing.

METHODNovel-Xingnaojing was injected via by caudal vein injection. The blood samples were collected by posterior orbital venous plexus approach at 0.5, 1, 3, 5, 8, 12, 20, 30, 45 min. The drug in plasma was extracted with ethyl acetate and then detected by GC-FID, octadecane was used as the internal standard. The pharmacokinetic parameters were calculated by the software of Kinetica.

RESULTThe calibration curve was good linear in the range of 1.67-16.67 mg x L(-1). The extraction recoveries of low, medium and high concentration were (92.81 +/- 1.11)%, (85.38 +/- 0.86)% and (84.58 +/- 0.58)%, respectivley. And the RSDs of within-day and between-day were below 3.00%. Plasma concentration of borneol was consistent with the two-compartment open model. The pharmacokinetic parameters were that the t1/2alpha was (1.18 +/- 0.20) min, the t1/2beta was (22.27 +/- 6.85) min, the C(max)(Calc) was (18.76 +/- 2.10) mg x L(-1), the MRT was (23.84 +/- 7.67) min(-1), and the AUC was (100.00 +/- 15.85) mg x min x L(-1).

CONCLUSIONThe GC-FID method developed can be applied to determination and pharmacokinetics. The borneol in novel-Xingnaojing is distributed and metabolized fast after being administrated.

Animals ; Bornanes ; pharmacokinetics ; Drugs, Chinese Herbal ; pharmacokinetics ; Flame Ionization ; methods ; Male ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo study pharmacokinetic of puerarin in rats following different methods of administration of Tongqiao Sanyu prescription.

METHODTongqiao Sanyu prescription was administered to rats by caudal vein injection, nasal administration and oral administration. Plasma samples were extracted with methanol and the plasma concentration of puerarin was analyzed by RP-HPLC. The pharmacokinetic parameters and bioavailability were calculated with Kinetica software.

RESULTThe main pharmacokinetic parameters were as follows: AUC(0-infinity) of caudal vein injection was (787.99 +/- 70.44) mg x min x L(-1); AUC(0-infinity) of nasal administration was (376.56 +/- 93.93) mg x min x L(-1); AUC(0-infinity) and oral administration (The dose was decuple higher than that of caudal vein injection and nasal administration) was (491.18 +/- 110.64) mg x min x L(-1). The absolute bioavailability of puerarin was 47.78% by nasal administration and 6.23% by oral administration.

CONCLUSIONThe bioavailability of nasal administration is higher than oral administration significantly, this result can provide some scientific foundantion for the method of administration and the reform of dosage form of Tongqiao Sanyu prescription.

Animals ; Biological Availability ; Drug Administration Routes ; Drugs, Chinese Herbal ; administration & dosage ; pharmacokinetics ; Isoflavones ; administration & dosage ; pharmacokinetics ; Male ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo study in vitro release of Xingnaojing microemulsion and to investigate the release mechanism.

METHODThe concentration of jasminoidin was determined by HPLC and the concentration of Aipian was determined by GC. In vitro release characteristics were conducted by dialysis technique. Model fitting was used to determine the kinetics and mechanism.

RESULTJasminoidin released completely within 2 h, fitting the Weibell model best. The release of borneol fitted first order model.

CONCLUSIONThe release mechanisms of different types of medicines are quite different. The different types of medicines dissolve in the different phases in the microemulsion.

Chromatography, High Pressure Liquid ; methods ; Drugs, Chinese Herbal ; chemistry ; Emulsions ; Molecular Weight

OBJECTIVETo study the absorption mechanism of tanshinones in the roots of Salvia miltiorrhiza as well as the interaction between the components in the effective fraction.

METHODThe model of intestinal absorption in vivo was used and the concentrations of the tanshinones were determined by HPLC, the apparent absorption constant (K(a)) and half life of absorption (t1/2) were obtained, the other components in the extract on the absorption of the there components were also studied.

RESULTWith the increase of dosage of tanshinone II A or cryptotanshinone, K(a) decreased and absorption half life t1/2 increased, the drug absorption rate constant (K(a)) had little significant effect on duodenum, Jejunum and ileum. Tanshinone I has a good absorbing in the rat small intestine. The absorption of tanshinone II A and cryptotanshinone was promoted by the other components in tanshinones extract while tanshinone I' was decreased.

CONCLUSIONWhen the concentration increases to a certain level, the uptake of tanshinone II A and cryptotanshinone do not increase. The transport mechanism of tanshinone II A and cryptotanshinone in vivo is similar to active transport or facilitated diffusion. They could be well absorbed in general intestinal tract without specific absorption site, and the complex constituents in extract could significant effect the absorption of the pharmaceutical effective constituents.

Absorption ; Animals ; Diterpenes, Abietane ; Drugs, Chinese Herbal ; analysis ; pharmacokinetics ; Intestine, Small ; drug effects ; physiology ; Male ; Phenanthrenes ; analysis ; pharmacokinetics ; Rats ; Rats, Sprague-Dawley ; Salvia miltiorrhiza ; chemistry

OBJECTIVETo study the characteristics of intestinal absorption of psoralen and isopsoralen of Xianlinggubao capsule, and compare the absorption of Xianlinggubao capsule prepared by different technologies.

METHODNon everted gut sac method was applied to investigate the influence of absorption sites and drug concentration on psoralen and isopsoralen absorption, which were determined by HPLC.

RESULTAlthough the absorption rate constants of psoralen and isopsoralen in duodenum were more than that in jejunum and ileum, there was no significance difference between them. The absorption rate constants of psoralen kept at the same level when the concentrations of drug solution were at middle and low level, while the absorption rate constant at high level was absolutely lower than them (P < 0.05). The results of isopsoralen were the same as psoralen's.

CONCLUSIONIntestinal absorption of psoralen and isopsoralen may be affected by the dissolution. The absorption rate constants of psoralen and isopsoralen in new Xianlinggubao capsules are higher. The absorptions of active components absorption has significant difference in different preparation processes of Xianlinggubao capsule.

Animals ; Capsules ; pharmacokinetics ; Drug Compounding ; Drugs, Chinese Herbal ; pharmacokinetics ; Duodenum ; metabolism ; Ficusin ; pharmacokinetics ; Furocoumarins ; pharmacokinetics ; Ileum ; metabolism ; Intestinal Absorption ; Intestines ; metabolism ; Jejunum ; metabolism ; Rats

OBJECTIVETo study the transdermal absorbability of gentiopicroside, naringin and protosappanin B contained in Xuanbi gel plaster.

METHODThe Franz diffusing cells method was adopted for the in vitro model of rat belly skins. Three indexes, gentiopicroside, naringin and protosappanin B, residued in the accept liquid, skins and plaster were determined by HPLC.

RESULTThe penetration rates of gentiopicroside, naringin and protosappanin B were respectively 3.47, 1.59, 2.13 microg x cm(-2) x h(-1). After 24 h, their penetration rates were 25.42%, 11.73%, 17.78%, respectively. The residual quantities of gentiopieroside, naringin and protosappanin B in skin were 0.231, 0.593, 0.568 microg x cm(-2), ith the retention rates of 0.027%, 0.227%, 0.475%, respectively. The amount of residue of gentiopicroside, naringin and protosappanin B in plaster were 2179, 674, 278 microg, with the retention rates of 81.36%, 81.92%, 73.83%, respectively.

CONCLUSIONThe in vitro transdermal behavior of Xuanbi gel plaster is close to a zero-order process. The residual quantity the retention rate in skins is much lower than the penetration rate and the residual rate in plaster.

Administration, Cutaneous ; Animals ; Flavanones ; metabolism ; Gels ; chemistry ; Iridoid Glucosides ; metabolism ; Male ; Phenols ; metabolism ; Rats ; Rats, Sprague-Dawley ; Skin Absorption