Objective To detect the value of dynamic spiral CT on the prostatic cancer and benign prostate hyperplasia(BPH).Methods Plain and dynamic spiral CT scans were obtained in 88 male patients with various ages due to prostate or other pelvis diseases.Out of these detailed data in 5 cases of prostate cancer and 11 cases of BPH which were confirmed by operation and pathology were available.Contrast enhancement pattern and degree were correlated with the pathological and operational findings.Results Prostate was enlarged in all cases except one prostate cancer and 3 cases of BPH within normal limits in size.The contour of the prostate was irregular in all cancer cases and one BPH.On dynamic CT scans,prostatic malignant lesions appeared iso-hypodensity with the rest of the prostate gland at the arterial stage and low density at the veinous stage.Diffuse heterogeneous central enhancement was found in 10 cases of BPH at the arterial stage,especially in the lateral lobes and further enhancement was found in 10 cases of BPH at the arterial stage,especially in the lateral lobes and further enhancement was found at the middle stage.There was little enhancement in the peripheral part at the arterial and veinous stages in BPH.The ratio of the central and the peripheral decreased.One case of BPH within normal size had spotty enhancement in the central part.On delayed CT scans 8 cases of BPH showed homogeneous enhancement in the total prostate gland.Conclusion Prostate cancer and BPH have their own characteristic enhancement patterns and degress,therefore dynamic spiral CT scan could help make differentiation between the two disease.

Objective To study the effect of Sildenafil in the treatment of hypoxemia after operation of cyanotic congenital heart disease.Methods A total of 34 cases with hypoxemia after operation of cyanotic congenital heart disease were collected between January 2009 to January 2015.They took Sildenafil with the dosage of 0.3-0.5 mg/kg every 6 hour.The change of heart rate (HR),systolic blood pressure (SBP),central venous pressure (CVP),pulmonary artery pressure (PAP),arterial partial pressure of oxygen [pa (O2)],arterial partial pressure of carbon dioxide [Pa (CO2)],oxygenation index [pa (O2)/FiO2],peak airway pressure (Ppeak),positive inotropic drug score (PIDS) and the lower bound of liver were observed at 4 time points,including before taking the medicine,after taking the medicine for 1 hour,after taking the medicine 1 day and after the ventilator was removed.Based on the data,the therapeutic effects of Sildenafil were studied.Results All 34 cases were cured.At the time point of 1 hour after taking Sildenafil,PAP,CVP and Ppeak decreased significantly,but pa (O2) and pa (O2)/FiO2 increased significantly (P ＜ 0.05).At the time point of 1 day after taking Sildinafil,SBP increased steadily,but PAP and CVP continued to get lower,and PIDS decreased significantly,while the liver lower bound was significantly reduced (P ＜ 0.05).At the time point of removing the ventilator,pa (O2) reached to (144.12 ± 26.25) mmHg,and hypoxemia was corrected,but PAP was reduced to (37.47 ± 3.77) mmHg,PIDS decreased to (17.56-± 1.94) scores,and heart failure was corrected.Compared with the previous 3 time points,there were statistically significant differences (P ＜ 0.05).Conclusion Sildenafil can highly selectively decrease pulmonary vascular resistance and obviously promote the correction of hypoxemia after operation of cyanotic congenital heart disease.

Objective To explore the diagnostic value of CT hypotonic colonography in carcinoma of colon.Methods A total of 55 cases who were diagnosed as ileus,abdomen mass or suspected colonic carcinoma clinically were undergone CT hypotonic clolonography in six years recently,in our hospital.Of them,CT data of 35 cases identified by pathology were analysed retrospectively.Results CT diagnosis was corresponded to the pathologic results in 34 cases .Of them,33 cases were colonic adenocarcinoma(1 case with intussusception of ileum-colon type),one case was abdominal multiple metastatic adenocarcinoma.One case with cecal inflammation and granulation tissues hyperplasia was misdiagnosed for colonic carcinoma by CT.21 of 35 cases were undergone colongraphy,of them,15 cases were diagnosed as colonic carcinoma,1 case was normal,colonographic failure occurred in one case and 4 cases were false negative.Conclusion Hypotonic water perfusion CT scan in the cases permitted under clinical condition(patient with ileus should be perfused with 3% meglumine diatrizoate) can display clearly the primary focus,the position and range of ileus,surrounding organ.It is more excellent than conventional CT and X-ray examination.