Diagnostic Value Of Preoperative T Staging Of Rectal Cancer Patients By Alone And Combined Using Intracavitary Probes Transrectal Ultrasonography

Aim:To investigate the efficiency of combined using head scanning and 360 degree intracavity probe transrectal ultrasonography(TRUS)in the diagnosis of T staging of rectal cancer patients.Methods:66 patients were in the First Affiliated Hospital of China Medical University Department of ultrasound from January 2016 to April 2017 and are all rectal cancer patients proved by pathology after surgery.Using Hitachi Pre ultrasonic diagnostic instrument,probe using head scanning intracavitary probe(4-8Mhz)and ring array 360 degree probe(5-10Mhz),Two kinds of probes were used in transrectal ultrasound examination of the 66 cases of rectal cancer patients before surgery.after the probe was inserted into the patient's anus,by moving and rotating probe method observation of the levels of the tumor infiltrating the intestinal wall,and the postoperative pathological T staging of the patients was obtained by the his system,use higher staging when the stages are inconsistent.The accuracy of ultrasonic uT staging with the results of postoperative pathological T staging is compared.For the comparison of the diagnostic efficiency of ultrasonic staging and pathological T staging,the kappa analysis method was used for consistency analysis of single and combined using two kinds of probes.The greater the kappa value,the higher the diagnostic consistency is.Chi square analysis is used to compare the diagnostic effectiveness of the two probes respectively,P<0.05has statistical significance.Results:66 cases of rectal cancer patients are included in this study,using head scanning intracavity probe T staging Overstage 11 patients and 7 patients are lack of staging,accuracy rate was 72.7%(k=0.625),using 360 degree intracavity probe T staging Overstage 6 patients and 9 patients are lack of staging,accuracy rate was77.2%(k=0.690),combined using the two probe T staging Overstage 4 patients and 3patients are lack of staging,accuracy rate was 89.3%(k=0.855).Compared with head scanning probe and two kinds of probe combined result was(?~2=7.697P=0.020),compared with 360 probe and and two kinds of probe combined result was(?~2=7.701 P=0.006).The kappa value with combined using two kinds of probe T staging compared with pathological results was significantly higher than that of the kappa value head scanning intracavity probe and 360 degree intracavity probe were used alone compared with T staging and pathological,and the accuracy rate of T staging compared with pathological T staging using head scanning and 360 degree intracavity probe was statistically significant different with the accuracy rate of the T staging of combined using the two kinds of probe.Conclusion:The combined using of head scan and 360 degree intracavitary probe can improve the accuracy of preoperative T staging for rectal cancer patients,which is helpful for assisting doctors to develop reasonable treatment plan and improve the accuracy of preoperative T staging of rectal cancer.