[Thromboelastography and classical coagulation tests in the preoperative period of liver transplantation].

Background: Compared to standard coagulation essays (SCE), such as international normalized ratio (INR), prothrombin activated partial thromboplastin time (aPTT), or platelet count, thromboelastograhy (TEG) offers precise and real-time information about hemostasis. TEG tests both platelet function and coagulation by assaying several parameters of clot formation dynamically in whole blood.

Aim: To evaluate hemostasis in cirrhotic patients undergoing liver transplantation and determine the positive and negative predictive values of SCE for alterations of TEG.

[Transesophageal echocardiography to monitor fluid administration during the perioperative period].

Background: During the perioperative period an adequate intravascular volume must be maintained. Current recommendations overestimate perioperative volume requirements.

Aim: To compare perioperative volume administration using standard monitoring methods or guided by left ventricular filling parameters.

[Trans-esophageal echocardiography in non-cardiac surgery: report of four illustrating cases].

Transesophageal echocardiography can assess ventricular filling ana contraction ana detect motility disturbances secondary to ischemia. In non-cardiac surgery it can be extremely helpful to monitor complex patients. We report a 69-year-old mole subjected to a hepatic lobectomy, a 59-year-old mole with hepatorenal syndrome, a 52-year-old female subjected to a gastric bypass, and a 54-year-old mole subjected to a thyroidectomy.

[Perioperative risk among patients with cirrhosis].

Ten percent of cirrhotic patients with severely compromised liver function will require a surgical procedure. This article reviews the surgical risk associated with liver damage and surgery. The most important prognostic factor is the degree of functional impairment of the liver.