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Biomedical subjects

F Villagra

Publications and source records attributed to F Villagra.

30 records · Page 2Linked to original sources
PubMed1977

Reoperation for dysfunction of the Björk-Shiley mitral disc prosthesis: report of eight cases.

Of 193 patients with Björk-Shiley mitral valve prostheses, replacement was necessary in 8 (4.1%). The reasons for reoperation were: detachment (4), thrombosis (1), technical error (1), and late disc entrapment (2). Five of these patients died (62.5%), the death being directly related to the need for urgent operation because of low cardiac output. We recommend avoiding the use of the larger sized Björk-Shiley prostheses, since striking of the disc against the ventricle wall, probably consequent to postoperative decrease in heart size, may appear even 1 year after implantation of the prosthesis. An early diagnosis and early reoperation offer these patients a much more favorable prognosis.

Adult↗
PubMed1977

Unusual complication of the Sengstaken-Blakemore tube.

Reported here is the first description of innominate vein obstruction by esophageal tamponade. The syndrome is characterized by local edema of the area drained by the vein. The diagnosis can be made by phlebography. Deflation of the balloon corrects the problem.

Adult↗
PubMed1977

[Experimental cardiogenic shock (author's transl)].

An experimental model fo cardiogenic shock has been developed in anesthetized dogs. The shock was produced by injecting mercury into the second diagonal branch of the descending anterior coronary artery. Arterial and venous pressure E.C.G., aortic, renal and circumflex flow were directly measured. Other parameters such as O2 consumption and arterio-venous difference were also studied. The present model seems very useful to make therapeutic studies. Open chest surgery has been used for simplicity and economic reasons.

Animals↗
PubMed1977

[Osmolar and free water clearance as renal function test during extracorporeal circulation with parcial and total hemodilution (author's transl)].

Four groups of dogs are subjected to extracorporeal circulation. Total hemodilution is used in groups I and II, either in normothermia or moderate hypothermia at 30 degrees C. Partial hemodilution is used in groups III and IV with identical temperature variations. The animals are kept under extracorporeal circulation for 120 min. Osmolar and free water clearance are measured at basal conditions after 40, 80 and 120 min. The present results show that total hemodilution should be used in those patients subjected to extracorporeal circulation where renal function has been previously disturbed.

Acute Kidney Injury↗
PubMedDate not supplied

Phrenic nerve paralysis following pediatric cardiac surgery. Role of diaphragmatic plication.

Eighteen children sustained unilateral phrenic nerve paralysis (PNP) after cardiac surgical procedures. Ten (Group I), under 7 months (mean: 2.9 +/- 2.2), required long-term ventilatory assistance (mean: 23.9 +/- 13.0 days); they failed to be weaned from the ventilator. All underwent diaphragmatic plication (DP). DP was performed late in 7 cases (Group Ia) with a mean time of 30.8 days between surgery and DP, and early in 3 others (Group Ib) with a mean time of 10.2 days. Eight children (Group II), older than 1 year, tolerated PNP better and could be extubated early without diaphragmatic plication. In Group Ia severe lung infections were recorded in 5 before or/and after DP, and two died at 3 and 30 days after plication. Five children from Group Ia and all 3 from Group Ib were late survivors. They could be weaned from ventilatory support in a mean time of 3 days after DP, although those with severe lung infection (Group Ia) took the longest time. All from Group II were late survivors. We conclude: PNP is well tolerated without plication in children older than 1 year. However early DP offers excellent and immediate results in infants with PNP. Early DP in these children avoids or reduces severe lung infections and death.

Cardiac Surgical Procedures↗
PubMedDate not supplied

Prosthetic valve endocarditis after heart catheterization.

It is accepted that patients with valvular disease or valvular prosthesis should be protected against endocarditis during procedures causing bacteriemia. On the other hand it has been shown that bacteriemia occurs during catheterization. Thus, protection against endocarditis for patients undergoing catheterization deserves more consideration, specially among patients with prosthetic valves. Moved by the fatal outcome of one of our patients with postcatheterization prosthetic valve endocarditis, the authors leave an open discussion about this subject.

Adult↗