Journal on Medical Genetics - BJSTR Journal

Abstract

Background: #Stimulus-evoked EMG improves the safety during pedicle screw placement in the #lumbosacral spine. The reported reliability of stimulus-evoked EMG in the detection of pedicle breaches in minimally invasive lumbosacral fixation has been variable. Besides the influence from different #physiopathological conditions, current shunting may also contribute in this variable reliability due to the small incision during minimally invasive surgery. Using a traditional suction system, continues suction is not viable during tapping and pedicle screw placement in minimally invasive surgery.

Objective: The author proposes a new design of non-metallic dilators adapted to continuous suction during tapping and #pedicle screw placement in minimally invasive surgery with the aim of minimizing the possible current shunting and optimizing the stimulation accuracy.

Materials and Methods: The proposed nonmetallic dilators have 2 canals. The larger canal would be used for the passage of the tap and the pedicle screw attached to the screwdriver. The lumen of the smaller canal would be connected to the connecting tubing attached to a reservoir with #vacuum pressure. After a small skin incision was made, each dilator was placed into a piece of porcine meat. The main canal of both dilators was partially sealed to simulate the passage of the instrumentation devices. Porcine blood was continuously injected into the created cavity to simulate the concurrent bleeding.

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Dilators Adapted to Continuous Suction System for Tapping and Pedicle Screw Placement for Minimally Invasive Lumbosarcal Fixation by Yunfen Wu in BJSTR