OBJECTIVETo investigate the absorption kinetics of atractylenolide I in intestines of rats and the influence of P-glycoprotein (P-gp) on the absorption.

METHODThe absorption kinetics was investigated using the method of in situ intestine absorption in rats and the samples were determined by HPLC.

RESULTAtractylenolide I is absorbed quite well at all segments of intestine in rats and no specific absorption was founded in different segment. When the concentration of perfusion solution was increased contrarily the absorption rate constant (Ka) kept at the same level. Compared Ka of three different concentration of perfusion solution with variance analysis method, Ka of atractylenolide I had no significant differences. But the Ka values were significently increased in the presence of P-gp inbibitor, verapamil or digoxin.

CONCLUSIONAtractylenolide I can be classified into high penetrating drug. Passive diffusion dominates the absorptive transport behivior of atractylenolide I. Atractylenolide I can be absorbed in the whole intestinal segments and there is not a preferntial absorption zone in the intestine. The absorption and secretion of atractylenolide I are mediated by the efflux transport system, P-gp.

ATP-Binding Cassette, Sub-Family B, Member 1 ; metabolism ; Animals ; Intestinal Absorption ; drug effects ; Intestines ; chemistry ; drug effects ; metabolism ; Kinetics ; Lactones ; pharmacokinetics ; Male ; Rats ; Rats, Sprague-Dawley ; Sesquiterpenes ; pharmacokinetics

Objective To discuss the clinical feature ,diagnosis and treatment of the occult cerebrospinal fluid rhinorrhea after tracheotomy in patients with severe traumatic brain injury .Methods The clinical data of 18 cases of the occult cerebrospinal fluid rhinorrhea after tracheotomy in patients with severe traumatic brain injury were retro -spectively analyzed .Results 15 cases showed involuntary swallowing movements ,frequent stimulus-likecough, abnormal increased secretions in the oral and nasal;3 cases performance of aspiration ,hypoxemia ,respiratory distress . After a three -dimensional thin skull CT , cisternography , nasal endoscopic examination can confirm the diagnosis . After the treatment with replacing the tracheostomy tube with a balloon ,continuous lumbar drainage ,endoscopic repair leak,the cerebrospinal fluid rhinorrhea were cured .Conclusion Patients with occult cerebrospinal fluid rhinorrhea performance the diversity and easily missed ,early detection and timely treatment can prevent cerebrospinal fluid rhi-norrhea delayed healing and intracranial infection and promote patient recovery .

Objective To study one male patient with cirrhosis for spironolactone induced gynecomastia and promote clinical pharmacists providing better pharmaceutical cares .Methods Based on the patient′s diseases and medication history , clinical pharmacists searched related literature and analyzed the cause of gynecomastia for the patient .Results The patient′s breast pain was relieved and finally disappeared after termination of spironolactone .Therefore ,spironolactone was suspected to be the drug to cause gynecomastia .Conclusion Clinical pharmacists can improve pharmaceutical cares by carefully monitoring the adverse reactions and selecting appropriate medications .