Objective To provide valuable references for ultrasonic diagnosis of pelvic organ prolapsed (POP) by finding an eas ily detecting referential line based on MRI.Methods Data of 107 patients who underwent pelvic MRI were retrospectively analyzed.All the patients were divided into 6 groups according to age:Group 1 (20 29 years old),group 2 (30-39 years old),group 3 (40-49 years old),group 4 (50-59 years old),group 5 (60-69 years old) and group 6 (≥70 years old group).Four reference lines were set basing on the median sagittal view of T2WI:PS-PS line (the line connecting the two endpoint of the pubic symphysis),PIAS line (the line connecting the inferior margin of pubic symphysis and the bottom of sphincter internal anal sphincter),PPC line (the line connecting of the inferior margin of pubic symphysis and the point of the pubococcygeous attached on the rectum) and PM line (the line connecting of the inferior margin of pubic symphysis and the M point [the midpoint of the line from the crosspoint of PPC line and the front wall of the rectum mucosa to the bottom of sphincter internal anal sphincter]).The angles between the horizontal line and PS-PS line,PIAS line,PM line,PPC line (angle 1,angle 2,angle 3,angle 4) were measured,respectively.The differences of the angle among various age-groups were compared.The consistency between the two observes were evaluated.Results PM line was the closest line to the horizontal line.There was no statistical differences of angle 1,angle 2 and angle 3 among the 6 groups (all P＞0.05).The difference of angle 4 among the 6 groups were significant (F=3.42,P=0.01).Intergroup pairwise comparisons showed that significant differences were found between group 1 and group 4,group 5,group 6,between group 2 and group 4,group 5,group 6,between group 3 and group 4,group 5,group 6,respectively (all P＜0.05).And no significant difference was found in the other comparisons.The consistency of the two observers in meaning angle 1,angle 3 and angle 4 were good,but the consistency of angle 2 was poor.Conclusion Of all the referential lines,PM is the closest to the horizontal line and is less influenced by the patient's age.However,the feasibility of using PM lines as the ultrasound referential line is still unclear.

Objective To evaluate the pelvic floor function in post-hysterectomy patients. Methods Transperineal pelvic ultrasound was used to observe the pelvic organs in post- hysterectomy patients, and parameters of pelvic floor were measured. Taking the inferior margin of public symphysis as the reference plane,the shape and motion of the proximal urethra and bladder neck were observed at rest and on maximum Valsalva maneuver. Bladder neck-symphyseal distance(BSD) and retrovesical angle were measured. And the bladder neck descent(BND),urethral rotation angle and the rotation angle of the bladder neck were also calculated. Interclass correlation coefficients were calculated to evaluate the consistency of data. Results At rest,the BSD and retrovesical angle were (-2.73±0.37)cm and (119.00±22.40)°, while on maximum Valsalva maneuver was (-0.25±0.67)cm and (114.74±21.50)°,respectively. BND was (2.46±0.59)cm,the urethral rotation angle and the rotation angle of the bladder neck was (70.68±19.91)° and (60.81±17.34) °,respectively. Combined with pelvic ultrasound and clinical manifestations,29 cases of pelvic floor dysfunction after hysterectomy were diagnosed (58.00%, 5 cases of stress urinary incontinence, 8 cases of proctoptoma and 16 cases of bladder prolapse). The consistency was very high in measuring BNS, retrovesical angle at rest and on maximum Valsalva maneuver and BND by different observers. The interclass coefficient was 0.90,0.89,0.91,0.88,0.92,respectively. And the interclass coefficient of urethral rotation angle and the rotation angle of the bladder neck was 0.79, 0.88,respectively. These results showed a good interobserver agreement. Conclusion Transperineal pelvic ultrasound is a simple,reproducible and noninvasive imaging method, which can reveal the position and function of female pelvic organ dynamically and evaluate postoperative pelvic floor function.

Objective To investigate the expression of melatonin MT1 receptor in rats with acute necrotizing pancreatitis (ANP) and the protective effects of melatonin (MT) pre-intervention for the pancreas. Methods Fifty-four male Sprague-Dawley (SD) rats were randomly divided into three groups:sham-operation group, ANP group and MT-pretreated group. The models of ANP were induced by retrograde injection sodium taurocholate into the bili-pancreatic duct. MT group undergoing intraperitoneal injection 50 mg/kg 30 minutes before the establishment of ANP models. Four, 8 and 12 hours after the onset of operation, the levels of serum amylase and pathological changes of the pancreas were observed. The contents of malondialdehyde (MDA), superoxide dismutase (SOD) and tumor necrosis factor-alpha (TNFα) in the pancreas were measured. The expression of MT1 protein and MT1 mRNA in pancreas were separately analyzed by immunohistochemistry and real-time PCR. Results (1) Pancreatic pathological damage in ANP groups was progressive exacerbated. It was obviously ameliorated in MT group as compared with ANP group ( P ＜ 0.05 ); (2) Compared with SO group, the levels of serum amylase, MDA and TNFα in the pancreas were significantly increased in ANP group (P ＜0.05 or P ＜0.01 ). They were markedly decreased in MT group as compared with ANP group [ 12 h, (2348.00 ±278.90)U/L vs (3194. 83 ±538.10)U/L,(2.255 ± 0.472 ) μmol/L vs ( 2.960 ± 0.722 ) μ mol/L, ( 102.929 ± 29.399 ) ng/L vs ( 378. 544 ±183.454)ng/L, P ＜ 0.05 ]. The level of SOD was decreased in ANP group compared with SO group (P ＜0.05) and increased in MT group[ 12h, (11.448 ± 1.594)U/L vs (8.427 ± 1.950)U/L, P＜0.05] ;(3)Compared with SO group, the expression of MT1 protein and MT1 mRNA in ANP group were down-regulated as the severity of the disease increased ( P ＜ 0.05 ). They were significantly higher in MT group than ANP group. Conclusions Melatonin pre-intervention is able to increase SOD level and decrease MDA, TNFα levels, thereby reducing pancreatic injury. The MT1 might play an important role in the pathogenesis of ANP. MT might exert protective effects for the pancreas in ANP rats through increase the expression of MT1.

This paper discusses the law of atrial electrical activity propagation (the timing of signal and the conduction velocity) under the sinus rhythm before and after AF caused by high-frequency electrical stimulation. The paper analyzes how different doses of acetylcholine affect the conductivity of the atrial cells of dogs. This result can also help the diagnoses and treatment of human's AF.
Acetylcholine ; pharmacology ; Animals ; Dogs ; Epicardial Mapping ; Heart Atria ; cytology ; drug effects ; physiopathology ; Mechanotransduction, Cellular

Objective To examine loss of heterozygosity (LOH) and microsatellite instability (MSI) of locus D8S532 on chromosome 8 and their influence on the expression of sFRP1 in the hepatocellular carcinoma (HCCs), which may provide an experimental evidence for clarifying the mechanism of sFRP1 gene and tumor development. Methods DNA was extracted from formalin-fixed paraffin-embedded tissues. Polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) and ordinary silver stain were used to study LOH and MSI of locus D8S532. Envision immunohistochemistry, Leica-Qwin computerized imaging system and Image-Pro PluS (IPP) version 4.5 professional imaging analysis software were used to assess the expression of sFRP1. Results The detection rates of LOH and MSI of locus D8S532 in the 36 specimens of HCC were 11.11% and 8.33% respectively. The down-regulation of sFRP1 was observed in 31 of 36 HCCs (86.11%) compared with non-carcinoma liver tissues, and the positive rate of sFRP1 protein of the HCCs was 52.78%( 19/36 ). The frequency of LOH was lower in the cases with positive expression of sFRP1 protein than those negative (0 vs 23.53%, P <0.05). Conclusion It was a common phenomenon that expression of sFRP1 protein is negative or low in Chinese with HCCs. The genetic instability of sFRP1 gene was one of causes, which lead to HCCs. LOH may play a major role in negative expression of sFRP1.

Objective To investigate the effect of mild hypothermia on expression of autophagyrelated proteins LC3 and Beclin-1 in the hippocampus of rats with traumatic brain injury (TBI).Methods Sixty healthy male adult SD rats were divided into sham group, TBI group, hypothermiatreated group (31-33℃) according to the random number, with 20 rats per group.Rat models of TBI were established using the Marmarou's method.After 4 h of normothermia or hypothermia, the rats were killed 6, 12, 24, and 48 h later.Co-localization of LC3 with neuron specific protein (NeuN) or mammalian target of rapamycinm (mTOR) was determined by double immunofluorescence.Levels of LC3, Beclin-1 and p-mTOR proteins were detected by Western blot analysis.Results LC3 co-localization with NeuN (or mTOR) was observed under confocal laser scanning microscope.In TBI group LC3 and Beclin-1 levels were seen to rise at 6 h, peaked at 24 h and fell slightly at 48 h, but the levels were still higher than these in sham group (P ＜ 0.05).In TBI group p-mTOR level began to decrease at 6 h, reached the lowest point at 12 h, and then ascended at 24 and 48 h, but the level was still lower than that in sham group (P ＜0.05).Mild hypothermia contributed to remarkable decreases in LC3 and Beclin-I expressions, while up-regulating p-mTOR after injury (P ＜ 0.05).Conclusion Mild hypothermia appears to be neuroprotective as it inhibits autophagy in hippocampal neurons after TBI in rats through activation of mTOR signaling pathway.

Objective:To investigate the effect of estrogen on the expression of P2X7 receptor ( P2X7R) in the cerebral cortex and neuroinflammation after subarachnoid hemorrhage ( SAH) in rats.Methods:The rat model of SAH was induced by modified mono-filament puncture method.Sixty male SD rats were divided randomly into three groups:sham group;SAH group and estrogen-treatment group.The local cerebral blood flow was detected with laser doppler blood flow meter.The content of tumor necrosis factor alpha ( TNF-α) and interleukin-6 (IL-6) were measured by ELISA analysis.The expression of P2X7R in the cerebral cortex was tested by immuno-histochemical and Western blot methods.Results:Compared with that in Sham group,cerebral blood flow was significantly decreased after SAH (P<0.05),the content of TNF-αand IL-6 in the cerebral cortex were significantly up-regulated at each time point after SAH (P<0.05),peaked at 24 h,and the expression of P2X7R significantly increased at 6 h,12 h and 24 h after SAH (P<0.05),peaked at 12 h.Compared with that in SAH group,cerebral blood flow was significantly increased in estrogen-treatment group (P<0.05),the levels of TNF-α,IL-6 and P2X7R were down-regulated in estrogen-treatment group ( P<0.05).Conclusion: Estrogen could attenuate neuroinflammation in the cerebral cortex after subarachnoid hemorrhage in rats, which may be associated with the down-regulation in P2X7R proteins.

Objective To explore the application and effects of bone lengthening growth diary in self management of patients after lower limb lengthening. Methods A total of 54 cases applying lower limb lengthening were divided into the experimental group (n=28) and the control group (n=26) with random digit table. The basic treatment was consistent, the control group was given routine guidance, the experi-mental group implemented self- management with bone lengthening growth diary. Self- recognition of disease was assessed and compared between the two groups 12 weeks after operation. Self- efficacy and self- manage ment were assessed and compared between the two groups 2 and 12 weeks after operation. Results The self- recognition of disease in the observation group was better than that of the control group, for patients with higher self- recognition degree (21 cases vs. 10 cases), χ2=8.64, P<0.05, the difference was significantly different. The total scores of self- efficacy and self- management in the observation group were higher than those of the control group,(48. 42±3.43) vs.(34.14±4.13),t=11.750, P<0.01;(55.35±2.69) vs.(42.15±3.67), t=15.130, P<0.01, the difference was significantly different. Conclusions Bone lengthening growth diary plays a beneficial role on self-management of patients with lower limb lengthening.

This paper introduces an adaptive filtering algorithm based on the LMS principle to inhibit the ventricular interference in the atrial epicardial mapping experiments.
Algorithms ; Electrocardiography ; Epicardial Mapping ; Heart Ventricles

In order to realize real-time sampling and display in 128-channeled Epicardial Mapping System whose sampling frequency is 2 kHz per channel, the article introduces a mapping software and preliminarily validates its practicability. The software is designed in MFC, using multiple-thread technology and buffering and pumping values method.
Epicardial Mapping ; Signal Processing, Computer-Assisted ; Software ; Software Design