Qian Hu is the roots of Peucedanum praeruptorum Dunn. The object of the present paper was to determine the effects of water extract (QH-I) and petroleum ether extract (QH-M) of Qian Hu on smooth muscle contractility of isolated rabbit pulmonary artery rings. QH-I and QH-M antagonized pulmonary artery rings conlraction elicited by NE as well as KCl.QH-I and QH-M caused relaxation of rabbit pulmonary artery rings precontracted with NE as well as KCl. The contraction dose-response curves of pulmonary artery rings with NE were shifted to the right and the maximal contraction response were inhibited 73.1 ?8.0% and 43 .6? 4.2% by 1 .6 ? 10-5% and 8.0 ? 10-5%, QH-M, pD'2 = 4.72 ?0.43. These results indicate that Qian Hu may relax pulmonary artery smooth muscle directly as a Ca2+ antagonist

Objective To investigate the nursing highlight of different contrast medium to detect gastric lesions by spectral CT.Methods A total of 150 patients with gastric cancer were averagely divided into experimental group and control group according to coin toss.The 20 ml iohexol mixed with 1 500 ml warm water were used in the experimental group,but only oral warm water was used in the control group.The monitored result of gastric cancer,adverse reactions and appropriate care were evaluated.Results The corrective rate of spectral CT for gastric cancer detection in the experimental group and control group were 96.0％ and 85.3％ respectively,and the difference was significant (x2 =5.042,P ＜ 0.05).Meanwhile,the proportion of adverse reactions in the experimental group and control group were 10.7％ (8/75) and 6.7％ (5/75),but the difference was not statistically significant (x2 =0.785,P ＞ 0.05).However,73.3％ patients in the experimental group underwent anxiety or depression,which was significantly higher than that in the control group (45.3％),with a statistically significant difference (x2 =12.185,P ＜ 0.01).Conclusions Iohexol can be used as a good developer spectrum of spectral CT,which may also improve the detection rate of gastric cancer.Meanwhile,corresponding nursing is also important during the process.

bjective? To expLore the effects of comprehensive nursing care on adverse reactions of contrast media in enhanced CT scan. Methods? From November to December 2016, we seLected 4 413 patients with enhanced CT scan in Cancer HospitaL of Peking Union MedicaL CoLLege. ALL of the patients were divided into controL group and observation group with the random number tabLe. There were 2 010 cases in controL group with routine nursing, whiLe there were 2 403 patients in observation group with comprehensive nursing. We observed the adverse reactions and satisfaction with nursing among patients with enhanced CT scan between two groups. ResuLts? The incidence of adverse reactions of observation group was Lower than that of controL group;the patients' satisfaction with nursing of observation group was higher than that of controL group; the differences were aLL statisticaL (P＜0.05). ConcLusions? Comprehensive nursing care can reduce the incidence of adverse reactions of contrast media and improve satisfaction with nursing among patients with enhanced CT scan.