Ultrasound-guided excision of nonpalpable malignant soft tissue tumors of the abdomen.

The use of intraoperative ultrasound to guide the excision of sonographically visible but nonpalpable lesions is a newer modality. Its use in intraoperative localization of recurrent malignant soft tissue tumors has not been reported. This report describes a technique of intraoperative localization by ultrasound to guide the excision of recurrent nonpalpable malignant soft tissue tumors of the abdominal wall in two patients.

Splanchnic perfusion during delayed, hypotensive, or aggressive fluid resuscitation from uncontrolled hemorrhage.

The purpose of this study was to determine the effect of three different fluid resuscitation strategies on splanchnic perfusion in a clinically relevant model of uncontrolled hemorrhage after liver trauma. Anesthetized swine were instrumented with a gastric near-infrared spectroscopy probe (GStO2), a jejunal tonometer (PrCO2), a portal vein catheter (SpvO2, lactate), and an ultrasonic blood flow probe on the superior mesenteric artery. The liver was lacerated to produce uncontrolled hemorrhage and a shock state characterized by a 40-60% decrease in cardiac output and a decrease in mean arterial pressure (MAP) to 42 +/- 1 mmHg.