[Patent ductus arteriosus in a dog: modified method of double ligation].

Patent ductus arteriosus, a common congenital cardio-vascular disease, needs surgery for correction. Three methods are described: 1. transsection and suturing of the ductus ends; 2. dissection of the ductus itself and occlusion by double ligation (classical method), 3. modified double ligation described by Jackson and Henderson. A modification of the technique is described, based on the previous methods of double ligation.