ABSTRACT
Objective To investigate the diagnostic value of Astograph methacholine provocation test in patients with chest tightness variant asthma ( CTVA)??Methods From January 2011 to February 2017,156 patients with CTVA in outpatient or inpatient department of respiratory medicine of Kailuan General Hospital affiliated to North China University of Science and Technology were selected as case group ( chest tightness variant asthma group )??The control group were 361 non?asthmatic patients including interstitial lung disease ( 23 cases), coronary disease ( 157 cases), hypertensive cardiopathy ( 22 cases), myocardiosis (16 cases),congenital heart disease ( 3 cases),rheumatic valvular heart disease (6 cases), central airway disease (3 cases),thyromegaly (10 cases),mediastinal tumor (5 cases),thoracic or spinal deformity (8 cases),phrenoparalysis (2 cases) and vegetative nerve functional disturbance (106 cases)??All participants received pulmonay ventilation test, average daily and nightly variation rate of PEF ( Peak expiratory flow) or PEF weekly variability, Astograph methacholine provocation test ( forced expirataory volume in one second≥70% expectation),and other relevant examinations??The diagnostic value of Astograph methacholine provocation test on CTVA was assessed by analyzing the sensitivity, specificity, positive predictive value,negative predictive value,and Yunden index of Astograph methacholine airway??Results Compared with the control group (( 1??18 ± 0??44)%), theforced expiratory flow from 75% of Forced vital capcacity ( FEF75 ) index of CTVA group (( 1??29 ± 0??50 )%) had significant difference (, t＝ 2??96, P＝0??006)??The sensitivity,specificity,positive predictive value,negative predictive value,Yunden index,and diagnostic accuracy of Astograph methacholine provocation test on CTVA were 0??814,0??695,0??536,0??305, 0??509 and 0??731, respectively??Conclusion The sensitivity, negative predictive value, Yunden index and diagnostic accuracy of Astograph methacholine provocation test on CTVA were higher,whereas the specificity and positive predictive value were relatively lower,suggesting that Astograph methacholine provocation test had a reliable diagnostic value on CTVA,with lower false negative and higher false positive??
ABSTRACT
Objective To analysis the effect of caffeine citrate on pulmonary function, vascular endothelial growth factor (VEGF)and insulin like growth factor -1 (IGF-1) in the apnea syndrome rats.Methods 80 male Wistar rats were selected, 20 were randomly selected to be the control group, the rest of the rats were replicated of apnea syndrome model.The rats were randomly divided into model group, experiment group and positive drug group, 20 of each group.The experimental group was given caffeine citrate injection of 5 mg/kg intraperitoneal injection, the positive drug group was given intraperitoneal injection of aminophylline 3 mg/kg, the model group was given intraperitoneal injection of normal saline, once a day, continuously for 1 week.Pulmonary function, serum VEGF, IGF-1 levels and sleep apnea were compared after the experiment.ResuIts Compared with the positive drug group, the related indexes of pulmonary function of the experimental group increased significantly ( P<0.05 ) .Serum VEGF levels decreased significantly (P<0.05).The serum IGF-1 level increased significantly (P<0.05).The sleep apnea index decreased significantly during the period of NREM and REM.(P<0.05).ConcIusion Caffeine citrate can improve apnea syndrome rats lung function, reduce the serum VEGF level, promote the formation of serum IGF-1, reduce the sleep apnea index.