THE STRUCTURE OF THE CERVICAL CANAL OF THE EWE

被引:89
作者
HALBERT, GW
DOBSON, H
WALTON, JS
BUCKRELL, BC
机构
[1] ONTARIO VET COLL,DEPT POPULAT MED,GUELPH,ONTARIO,CANADA
[2] ONTARIO VET COLL,DEPT CLIN STUDIES,GUELPH,ONTARIO,CANADA
[3] UNIV GUELPH,DEPT ANIM & POULTRY SCI,GUELPH N1G 2W1,ONTARIO,CANADA
关键词
cervical canal; sheep; transcervical passage;
D O I
10.1016/0093-691X(90)90060-7
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The cervical canal of the ewe does not allow for the consistent transcervical passage of insemination instruments. To define the factors affecting transcervical passage, the gross anatomy of the cervix and canal were studied in 100 estrous ewes and then in their reproductive organs following slaughter. In each ewe, the vagina and cervical opening was examined and the external os was classified into one of four types. Insemination instruments were introduced into the cervical opening and manipulation through the canal was attempted. Fluoroscopy was used to record the flow of contrast material through the canal. Ultrasound, xeroradiography and computed axial tomography were used to image the canal of the recovered reproductive tracts. Following imaging, each cervical canal was filled with silicone to create a mold which was used to measure and describe the canal. The average length (±SD) of the cervical canal was 6.7 ± 1.1 cm and contained 4.9 ± 1.0 funnel-shaped rings (n = 79). Successful passage of insemination instruments was limited by failure to identify the cervical opening and the small openings in the rings, 2.7 ± 1.1 mm on average (±SD) which were not concentrically aligned. The eccentric rings were most consistently the second or third rings from the external os. The design of effective instrumentation and technique for transcervical passage must take these factors into account. © 1990.
引用
收藏
页码:977 / 992
页数:16
相关论文
共 5 条
[1]  
BUNCH T D, 1981, International Goat and Sheep Research, V1, P282
[2]  
DUN R. B., 1955, Australian Veterinary Journal, V31, P101, DOI 10.1111/j.1751-0813.1955.tb05513.x
[3]   FURTHER-STUDIES ON NON-SURGICAL INTRA-UTERINE TECHNIQUE FOR ARTIFICIAL-INSEMINATION IN THE EWE [J].
FUKUI, Y ;
ROBERTS, EM .
THERIOGENOLOGY, 1978, 10 (05) :381-393
[4]  
MORE J, 1984, ACTA ANAT, V120, P156, DOI 10.1159/000145911
[5]  
VONREINHOLD G, 1987, MH VET MED, V42, P364