ABSTRACT
The left ventricular radial strain in the inner and outer layers was evaluated by using two-dimensional speckle tracking imaging (2DS). Twenty-five piglets were studied. The short axis views were acquired. Peak systolic radial strain was measured from 6 circumferential points related to 6 standard segments in the inner and outer layers respectively using 2DS methods. The peak positive first derivative (dp/dt) of left ventricular pressure was compared to the radial strain from 2DS. The inner band showed higher peak radial strain values as compared to the outer band at all of the segments (P<0.0001), but the differences had significance just in anteroseptal, posterior, inferior and septal segments (P<0.05). Good correlation could be found between radial strain of inner and outer layers and peak dp/dt (P<0.001). These preliminary results showed that the degree of local deformation or wall thickening of the ventricular wall in its inner layer was more obvious than its outer layer. It is suggested that the 2DS technique is useful and sensitive for better understanding the regional and global myocardial motion and its relationship to the complex architecture of myocardium.
ABSTRACT
OBJECTIVE To find the safer anesthesia induction methods in children with laryngeal papilloma combined by dyspnea.METHODS 50 laryngeal papilloma children with II degree laryngeal obstruction were randomly divided into 2 groups:inhalational group and intravenous group,no muscle relaxant was used in either of the groups.MAP,and SpO2 were observed at one minute before and after induction.The intubation condition was also assessed and compared between the 2 groups.RESULTS MAP and HR in intravenous group were significantly higher than those of inhaled group after intubation [(68.7?6.4)mmHg vs.(64.0?8.0)mmHg;(142.6? 13.8)bpm vs.(124.6?12.5)bpm;P0.05].For the intubation condition,the satisfactory rate in inhaled group was higher than that of intravenous group,P
ABSTRACT
Objective The purpose of this study was to determine and compare the effect of patient controlled analgesia(PCA) with tramadol and fentanyl on postoperative sleep pattern in patients with severe obstructive sleep apnea syndrome(OSAS) Methods Forty five ASA Ⅱ patients with severe OSAS undergoing uvula palate pharyngoplasty(UPPP) were randomly divided into 3 groups of 15 patients each according to the postoperative PCA the patients received: 1) tramadol group; 2) fentanyl group and 3) control group The patients were premedicated with intramuscular atropine 0 01mg?kg -1 .The patients were adequately sedated (Ramsay Ⅱ Ⅲ) with midazolam 0 03 mg?kg -1 and fentanyl 2?g?kg -1 Awake intubation was performed under topical anesthesia Anesthesia was then induced with propofol 1 5 2 0 mg?kg -1 and maintained with inhalation of 1 0% 1 5% isoflurane and 60% N 2O and intermittent intravenous boluses of vecuronium PCA was started when the patients were awake Tramadol 500mg (tramadol group) and fentanyl 500?g (fentanyl group) were diluted to 100ml(tramadol 5mg?ml -1 , fentanyl 5?g?ml -1 ) A loading does of 10ml was given followed by continuous intravenous infusion at a rate of 3ml?h -1 PCA bolus does was 1 5ml and lock out time 10 min Polysomnography(PSG) was continuously monitored and recorded the first night after operation from 10 pm to 6 am next morning According to Rechtschaffen standard sleep was divided into 6 stages: stage Ⅰ, stage Ⅱ, slow wave sleep(SWS)(stageⅢ+Ⅳ), stageV (rapid eye movement REM) and stage Ⅳ(awake) Results During the 480 min of PSP monitoring, SWS was (13 06?7 56) min in tramadol group, (9 2?7 26) min in fentanyl group and (6 33?4 68)min in control group and the total sleep time (TST) was (197 4?84 48) min in tramadol group, (148 33?72 73)min in fentanyl group and (124 13?61 38)min in control group SWS and TST were significantly longer in tramadol group than those in control group(P