Stacey B. Day

Development of Interarterial Intercoronary Anastomoses by Arteriovenous Fistula Between Pulmonary Artery and Left Atrium.

Summary 1. No interarterial intercoronary anastomoses between any branch of right and left coronary artery could be demonstrated at autopsy in normal dogs with a vinyl plastic injection mass. 2. Following surgical production of arteriovenous fistula (10-12 mm long) between main pulmonary artery and left atrium, interarterial intercoronary anastomoses between right and left coronary arteries were demonstrated at postmortem examination in 5 of 7 dogs examined at intervals of 2 days to 14 weeks following surgery. These anastomotic communications were arterial in size.

Biological Perspectives of Some Trauma Injuries

Some biological aspects of trauma are presented in the following table. This paper presents a brief overview of some of these injuries.

Prevailing interstitial pressures in the lower limbs

SummarySubcutaneous interstitial pressures were measured in the normal and oedematous human lower limb employing a “null point” procedure according to the criteria of McMaster. It was determined that the mean average tissue pressure for normal healthy male and female adults measured in the supine position was of the order of 2·5+0·2 mms. Hg. 96% of the healthy normal general population could be anticipated to fall within this group (2 S.D.). Individuals with marked clinical oedema demonstrated elevated tissue pressure consistently outside those of the control normal population.

The role of anatomical variations in the coronary arteries with particular emphasis upon intercoronary anastomoses

SummarySeveral demonstrations of variation in the patterns of the coronary arteries in man, dog and pig have been presented from the experimental surgical laboratory.Particular emphasis has been made of the rôle and function of inter-coronary anastomoses, and their clinical importance briefly discussed.

An experimental study of a veno-venous anastomosis between the renal vein and the portal vein in dogs.

SummaryVeno-venous anastomosis between the right renal vein and the portal vein has been performed in dogs. It appears unlikely that the oxygen content of the portal vein can be augmented to any significant degree following this procedure, or that such an experimental operation can bestow lasting benefit to the liver of dogs challenged by acute total hepatic artery ligation.

Submergence of bleeding coronary artery in myocardial tunnel: experimental study

Summary 1) An experimental technic developed in dogs is described in which an endarterectomy incision into a normal major coronary artery has been followed by submergence of the freely bleeding coronary vessel into the myocardium. Such a coronary artery was demonstrated to remain patent in 15 of 17 dogs in which the submerged artery was studied at intervals of 9 to 22 weeks after surgery. The procedure has been free from thrombosis that not uncommonly attends insertion of coronary by-pass prostheses or anastomotic procedures upon the coronary arteries. 2) Regeneration of coronary endothelium has been demonstrated at 22 weeks unattended by clot or thrombus formation. It would appear likely that in the operation of coronary endarterectomy upon man the present procedure may simplify the operation and serve as a satisfactory method of controlling the opened vessel in those cases in which pathological change in the coronary artery makes closure of the arteriotomy wound undesirable.