Haney Davida R, Levy Julie K, Newell Susan M, Graham John P, Gorman Shawn P
Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA.
J Am Vet Med Assoc. 2003 Dec 1;223(11):1614-6. doi: 10.2460/javma.2003.223.1614.
To determine the relationship between parturition date and fetal skeletal mineralization detected radiographically in cats.
Prospective clinical trial.
31 queens and their 49 pregnancies.
Seventeen pregnant queens were radiographed with a computed radiography system every 2 to 3 days from 1 week after pregnancy was identified by abdominal palpation until parturition. Radiographs were evaluated to determine the first identifiable mineralization of 16 bony structures and teeth during each pregnancy. This information was used to establish a table of expected parturition dates on the basis of fetal mineralization. Single radiographs from an additional 32 pregnant cats were evaluated, and predictions of parturition dates were made on the basis of the mineralization table.
Mineralization was first detected 25 to 29 days prior to parturition (dpp). Mineralization was determined for the spinal column (22 to 27 dpp), skull (21 to 27 dpp), ribs (20 to 25 dpp), scapula (17 to 24 dpp), humerus (20 to 24 dpp), femur (19 to 23 dpp), radius (15 to 22 dpp), tibia (15 to 21 dpp), ulna (5 to 21 dpp), pelvis (8 to 20 dpp), fibula (0 to 17 dpp), tail (8 to 16 dpp), metacarpals and metatarsals (3 to 14 dpp), phalanges (0 to 11 dpp), calcaneus (0 to 10 dpp), and teeth (1 to 6 dpp). Date of parturition was predictable within 3 days in 75% of cats.
Identification of bony structures in the fetus is useful in estimating the time to parturition in queens.
确定猫的分娩日期与通过放射学检测到的胎儿骨骼矿化之间的关系。
前瞻性临床试验。
31只母猫及其49次妊娠。
从通过腹部触诊确定怀孕后1周起，每隔2至3天使用计算机X线摄影系统对17只怀孕母猫进行X线摄影，直至分娩。对X线片进行评估，以确定每次妊娠期间16个骨骼结构和牙齿的首次可识别矿化情况。利用这些信息建立基于胎儿矿化的预期分娩日期表。对另外32只怀孕母猫的单张X线片进行评估，并根据矿化表预测分娩日期。
矿化首次在分娩前25至29天（dpp）被检测到。确定了脊柱（22至27 dpp）、颅骨（21至27 dpp）、肋骨（20至25 dpp）、肩胛骨（17至24 dpp）、肱骨（20至24 dpp）、股骨（19至23 dpp）、桡骨（15至22 dpp）、胫骨（15至21 dpp）、尺骨（5至21 dpp）、骨盆（8至20 dpp）、腓骨（0至17 dpp）、尾巴（8至16 dpp）、掌骨和跖骨（3至14 dpp）、指骨（0至11 dpp）、跟骨（0至10 dpp）以及牙齿（1至6 dpp）的矿化情况。75%的猫的分娩日期可在3天内预测。
识别胎儿的骨骼结构有助于估计母猫的分娩时间。
