Objectve To explore the application of exercise test use in diagnosis of periodic paraly sis.Methods Forty five cases of hypokalemic periodic paralysis were collected,and 40 health persons as control group.Both groups were measured serum potassium,serum creatase and thyroid function tests.All of them were taken exercise test (ET) and observe 50 minutes,measured before and after the test to seek the changes of compound muscle action potentials (CMAP),and its decreased more than 33％ were considered abnormal.The application of exercise test use was analyzed in diagnosis of periodic paralysis.Results In patients with periodic paralysis,the incidence of ET positive was higher than the control subjects (80％ vs 3.3％,P ＜ 0.001).This trend was significant after 20 minutes,such as 30 min[(37.8 ± 13.2)％ vs (6.2±3.2)％,P＜0.01],40min [(40.3 ±17.6)％ vs (3.2±1.9)％,P＜0.01],50min [(45.26 ± 19.9) ％ vs (-5.1 ± 2.6) ％,P ＜ 0.01].Moreover,linear correlation analysis showed that the serum potassium had negative correlation with serum creatase (r =-0.483,P =0.024).ALL of symptoms improved after a week treatment,the ET positive rate was still higher in patients with periodic paralysis than the control subjects (80.0％ vs 71.1％,P =0.824).Conclusions Exercise test was one of the important objective basis in the diagnosis of low potassium type periodic paralysis,and was not affected by treatment and testing time.

OBJECTIVE: To compile a questionnaire on maternal and child health birth cohort study, to provide effective tools for exploring the effect of various exposure factors on pregnancy outcome and children's health, and to track children's growth and development dynamically.
 METHODS: The preliminary questionnaire on maternal and child health birth cohort study was designed after literature research, health information systems analysis and group discussion. The questionnaire was finalized after expert consultation and pre-survey.
 RESULTS: The formal questionnaire on maternal and child health birth cohort study was developed, including maternal health information and children's health information.
 CONCLUSION The questionnaire can be used for collecting maternal health data and children's health data within 1 year old, and this work is useful for scholars in the study on birth cohort invovling the maternal and child health.
Child Health ; Cohort Studies ; Female ; Humans ; Infant ; Maternal Health ; Pregnancy ; Pregnancy Outcome ; Surveys and Questionnaires