Ching, Siok Siong Comparison of torsional and linear mode ultrasonic coagulating shears for sealing veins. [electronic resource] - Journal of laparoendoscopic & advanced surgical techniques. Part A Dec 2008 - 819-24 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1092-6429 Standard No.: 10.1089/lap.2008.0066 doi Subjects--Topical Terms: Chi-Square DistributionElectrocoagulation--instrumentationEquipment DesignEquipment SafetyHemostasis, Endoscopic--instrumentationHumansStatistics, NonparametricSurgical InstrumentsTensile StrengthUltrasonic Therapy--instrumentationVaricose Veins--surgeryVascular Surgical Procedures--instrumentation