Int J Comput Assist Radiol Surg - Reliability of sensor-based real-time workflow recognition in laparoscopic cholecystectomy.

Tópicos

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Resumo

RPOSE: Laparoscopic cholecystectomy is a very common minimally invasive surgical procedure that may be improved by autonomous or cooperative assistance support systems. Model-based surgery with a precise definition of distinct procedural tasks (PT) of the operation was implemented and tested to depict and analyze the process of this procedure.METHODS: Reliability of real-time workflow recognition in laparoscopic cholecystectomy ([Formula: see text] cases) was evaluated by continuous sensor-based data acquisition. Ten PTs were defined including begin/end preparation calots' triangle, clipping/cutting cystic artery and duct, begin/end gallbladder dissection, begin/end hemostasis, gallbladder removal, and end of operation. Data acquisition was achieved with continuous instrument detection, room/table light status, intra-abdominal pressure, table tilt, irrigation/aspiration volume and coagulation/cutting current application. Two independent observers recorded start and endpoint of each step by analysis of the sensor data. The data were cross-checked with laparoscopic video recordings serving as gold standard for PT identification.RESULTS: Bland-Altman analysis revealed for 95?% of cases a difference of annotation results within the limits of agreement ranging from [Formula: see text]309?s (PT 7) to +368?s (PT 5). Laparoscopic video and sensor data matched to a greater or lesser extent within the different procedural tasks. In the majority of cases, the observer results exceeded those obtained from the laparoscopic video. Empirical knowledge was required to detect phase transit.CONCLUSIONS: A set of sensors used to monitor laparoscopic cholecystectomy procedures was sufficient to enable expert observers to reliably identify each PT. In the future, computer systems may automate the task identification process provided a more robust data inflow is available.

Resumo Limpo

rpose laparoscop cholecystectomi common minim invas surgic procedur may improv autonom cooper assist support system modelbas surgeri precis definit distinct procedur task pt oper implement test depict analyz process proceduremethod reliabl realtim workflow recognit laparoscop cholecystectomi formula see text case evalu continu sensorbas data acquisit ten pts defin includ beginend prepar calot triangl clippingcut cystic arteri duct beginend gallbladd dissect beginend hemostasi gallbladd remov end oper data acquisit achiev continu instrument detect roomtabl light status intraabdomin pressur tabl tilt irrigationaspir volum coagulationcut current applic two independ observ record start endpoint step analysi sensor data data crosscheck laparoscop video record serv gold standard pt identificationresult blandaltman analysi reveal case differ annot result within limit agreement rang formula see text pt s pt laparoscop video sensor data match greater lesser extent within differ procedur task major case observ result exceed obtain laparoscop video empir knowledg requir detect phase transitconclus set sensor use monitor laparoscop cholecystectomi procedur suffici enabl expert observ reliabl identifi pt futur comput system may autom task identif process provid robust data inflow avail

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