[Ligation of the ductus arteriosus in premature infants. Surgical considerations].

It is described the surgical interruption of Patent Ductus Arteriosus in ten premature newborn patients with cardiac insufficiency and/or respiratory distress syndrome. The authors mention the technical factors that they consider important to have good results with these fragile infants, as the use of local anesthesia; to perform the procedure in the neonatal intensive care unit, the extrapleural dissection of the ductus, etc. The post-operative care problems are analyzed and this experience is compared with reports from other authors.

The incorporation of acetylcholinesterase from the electric organ into liposomes.

Several methods have been used to bind electric organ aetylcholinesterase to the walls of phosphatidylcholine liposomes. One of these methods [Brunner, J., Skrabal, P.

[Is closed mitral commissurotomy still indicated? Patient selection and postoperative problems. Analysis of 221 cases].

Indications, findings, complications, and immediate results in 221 patients in whom a closed mitral commissurotomy was practiced are presented. Emphasis is placed on the rigidity of the clinical criteria to select these patients with the object of diminishing to a minimum the accidents or problems and unexpected findings. The results are considered satisfactory and comparable to those reported in other great centers.

[Conservative management of infected and/or exterior pacemakers. Analysis of 35 cases].

Thirty-five cases of infected pacemakers were revised comparing the results obtained through the conservative attitude in comparison to the traditional attitude. It was pointed out a way to better even further the results obtained through the conservative attitude. Some surgical and medical problems were analized and the way to came through them with respect to this complication, the literature that is in favor of this conduct was also analyzed.

[ Exsanguination, extreme hemodilution and autologous retransfusion in cardiopulmonary bypass].

In ten dogs and seven patients undergoing open heart surgery, 94% of circulatory volume was replaced by electrolitic solutions; extracted blood was stored temporarily at 5degreesC. Usage of blood was avoided for replacement of extracorporeal fluid circuit and blood lost during surgery. After cardiopulmonar bypass, storage blood was transfused.