Laparoscopic vessel sealing devices have revolutionized modern laparoscopy. These devices fall into 2 major categories: advanced bipolar and ultrasonic instruments. The range of tissue effects available with these technologies is more limited than with conventional monopolar electrosurgery; however, both advanced bipolar and ultrasonic devices efficiently seal vessels (≤7-mm and ≤5-mm diameter,...

BACKGROUND AND PURPOSE While the power needed to initiate bipolar vaporization is higher than conventional monopolar resection, the energy needed to maintain bipolar vaporization is significantly lower and may result in less thermal tissue injury. This may have implications for hemostasis, scarring, and perioperative morbidity. The objective of this study is to assess histopathologic changes in...

Hemostasis in minimally invasive surgery causes tissue damage. Regardless of the method of production of thermal energy, a quick and safe coagulation is essential for its clinical use. In this study we examined the tissue damage in the isolated perfused pig liver using monopolar, bipolar, cold plasma, and ultrasonic coagulation. In a minimally invasive in vitro setup, a 2-3 cm slice of the edge...

Abstract The article presents the results of research and an analysis possibility using sinters made graphite powder as a material dedicated to production bipolar plates for low-temperature fuel cell. use metallurgy technology allows materials that meet requirements cell elements construction closing single (bipolar or monopolar plates) interconnectors. morphological chemical powder, microstruc...

OBJECTIVE Bipolar transurethral resection (TUR) has been introduced in the clinical practice nowadays. Benefits from bipolar TUR are represented by the use of saline irrigation, which avoids hypoosmotic hyperhydration (TUR-Syndrome), as well as by the reduced risk of obturator nerve stimulation. However, the previously introduced smaller bipolar resection loop caused prolonged operating-time. W...

S plitting mitotic cells in two is not the one-way signaling road it once seemed, based on evidence from Hu et al. The group identifi es a positive feedback loop that creates a furrow at cytokinesis. The fi ndings also throw a wrench in the well-accepted dogma of microtubule dynamic instability. Hu and colleagues devised a monopolar HeLa system to determine how the cytokinetic furrow is created...

stimulation permits routine EKG, EEG, and polysomnography Abstract—As the population of patients treated with deep brain stimulation (DBS) grows and the patients age, more will require routine or emergent electrophysiologic tests. DBS artifact may render these uninterpretable, whereas stopping DBS may release symptoms that confound evaluation. The authors find that monopolar, but not bipolar, s...