Mechanical comparison of two knots and two crimp systems for securing nylon line used for extra-articular stabilization of the canine stifle.

Objective: To compare mechanical properties of knotted and crimped nylon loops.

Study Design: In vitro mechanical evaluation.

Sample Population: Loops of 27 kg-test nylon leader.

Atresia ani in the dog: a retrospective study.

Congenital anomalies of the rectum and anus are rare in dogs. The most frequently reported anomaly is atresia ani. Four types of atresia ani have been reported, including congenital anal stenosis (Type I); imperforate anus alone (Type II) or combined with more cranial termination of the rectum as a blind pouch (Type III); and discontinuity of the proximal rectum with normal anal and terminal rectal development (Type IV).

Double aortic arch in a dog.

Vascular ring anomalies are developmental anomalies of the thoracic great vessels resulting in complete or partial encircling of the esophagus and the trachea by a vascular ring formation. Persistent right aortic arch with left ligamentum arteriosum accounts for 95% of vascular ring anomalies in dogs. The dog in this report had a double aortic arch, which is a type 4 vascular ring anomaly.