Arterial blood flow in dogs, distal to the site of gunshot injury and repair, was below normal for at least three hours after repair. Concommitant sympathectomy provides a 50% increase in flow across the repair within 40 minutes and a doubling of flow 80 minutes following reconstruction.
Williams GD, Crumpler JB, Campbell GS. Effect of Sympathectomy on the Severely Traumatized Artery. Arch Surg. 1970;101(6):704-707. doi:10.1001/archsurg.1970.01340300060011