Technology or Theory for Surgical Operation

Surgical Results of Third or More Cardiac Valve Operation

BACKGROUND We evaluated operative outcomes after third or more cardiac operations for valvular heart disease, and analyzed whether pericardial coverage with artificial membrane is helpful for subsequent reoperation. METHODS From 2000 to 2012, 149 patients (male: female=70: 79; mean age at operation, 57.0±11.3 years) underwent their third to fifth operations for valvular heart disease. Early r...

Surgical Operation Returns

Serum immunoglobulins after surgical operation.

We measured immunoglobulins in the sera of 33 patients on days 1, 3, 6, 10, and 17 and three to four weeks after surgical operations (mostly hysterectomy or appendectomy) or (six patients) after spinal injury. In the absence of infection or blood transfusion, IgG usually decreased slightly and transiently after hysterectomy or appendectomy, as did IgA or IgM after hysterectomy. IgD concentratio...

DETERMINATION OF OPTIMAL HEDGING RULE USING FUZZY SET THEORY FOR MULTI-RESERVOIR OPERATION

To deal with severe drought when water supply is insufficient hedging rule, based on hedging rule curve, is proposed. In general, in discrete hedging rules, the rationing factors have changed from a zone to another zone at once. Accordingly, this paper is an attempt to improve the conventional hedging rule to control the changes of rationing factors. In this regard, the simulation model has emp...

New technology for surgical coronary revascularization.

In the past decade, the face of surgical coronary revascularization has been changed by a number of advances, most notably the development of minimally invasive techniques, including minimally invasive direct coronary artery bypass (MIDCAB), off-pump coronary artery bypass (OPCAB), and totally endoscopic, robot-assisted coronary artery bypass grafting (TECAB). Initial attempts to perform cardia...