排序方式: 共有57条查询结果,搜索用时 31 毫秒
41.
42.
43.
44.
45.
46.
目的 :建立灵敏、特异的人血浆AVP放射免疫测定法。方法 :用氨胺—T法标记AVP ,BSA终止反应 ,经SephadexG -25柱纯化 ,获高比放射性 125I-AVP ,血浆标本经C18Sep-Pak柱纯化后进行放免分析。结果 :该方法灵敏度为0.7pg,回收率93.5±8.1 % ;批间变异系数13 % ,当血浆AVP浓度为3.0pg/ml和11.0pg/ml时 ,批内变异系数分别为11 %和6.4 %。临床应用结果证实 :隔夜禁饮 ,正常人清晨空腹的血浆渗透压为290.0±7.3mosm/kgH2O时 ,血浆AVP浓度为3.8±1.9pg/ml;本法能准确诊断不适当的抗利尿激素分泌和尿崩症 ,将典型的中枢性尿崩症与其他低渗性多尿症区分开来。结论 :本方法适用于临床及科研。 相似文献
47.
48.
切除双侧甲状腺大鼠血清 T_3,T_4下降,TRH 升高,垂体重量增加(P 均<0.001)。用助阳药可使 T_4较不用药组增高,垂体重量较低(P 均<0.01),TRH 较低(P<0.001),但助阳药使正常大鼠 T_3下降(P<0.001),TRH 升高(P<0.002)。饲用甲状腺片造成高甲状腺素状态大鼠 T_3,T_4升高,TRH 下降,用清热养阴药后使 T_4较不用药组下降(P<0.05)。 相似文献
49.
本文用~3H标皮质醇(F)测唾液、血浆和尿F浓度。6名正常人肌注ACTH(25u)试验中,血和唾液F8Am平均基值分别为141.6和4.4ng/ml;血浆F高峰值在肌注后60~90分钟出现,平均为基值的1.8倍;唾液F峰值在90~120分钟出现,反应倍数平均4.8倍.8Am游离F比率(唾液F/血浆F)3.0%,120分钟升达8.4%。5名正常人静滴ACTH25u8小时,血浆和唾 相似文献
50.
Lu Yorig-ren陆永仁 Kuang An-kun邝安望 Chen Jia-lun陈家伦Xu Man-yin许曼音and Ding Ting丁霆Shanghai Institute of EndOCTinol:ogy Shanghai 《中华医学杂志(英文版)》1988,101(10):703-709
The measuremeiit of salivary cortisol (F) wasaccomplished by using tritium labeled F. Comparison
between saliva cortisol concentrations in matched
samples collected with or without stimulation of citric
acid indicated that salivary cortisol concentration
is independent of salivary flow rate. In 104 normal
subjects, average salivary cortisol value was 3.15
ng/ml with no significant sex difference. The ratio
of saliva cortisol to plasma cortisol was 3.070. The
oomparative circadian variations in saliva and plasma
cortisol levels were examined and samples collected
every 4 hours throughout a 24hour cycle. The
result indicated that the levels of salivary cortisol
parallelled tho:.e of plasma cortisol. After ACTH
stimulation the cortisol response of 6 control subjects
was greater in the saliva than in the plasma. 90
minutes after intramuscular ACTH injection the cor
tisol level was 4.&fold the basal in saliva, compared
with l.&fold in plasma. After eight hour ACTH tn-
traavenous infusion the cortisol level increased by 8.6
fold in the saliva, compared with 3.4-fold in the
plasma. Cortisol level suppression was also more pro-
nounced in the saliva (9070) than in the plasma (8570)
after 0.75 mg dexamethasons administration. In 13
control subjects the average salivary cortisol level of
6 measurements throughout a 24-hour cycle was l.36
ng/ml, whereas in 12 cases of Cushing's syndrome
this reached 9.1 ng/ml and in 2 cases of Addison's
disease it was only 0.14 and 0.52 ng/ml. In 105pregnant women total serum cortisol concentration
was markedly increased, but salivary cortisol level
was within the normal range of nonpregnant wDmen. 相似文献