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Detent for Articulation

IP.com Disclosure Number: IPCOM000225223D
Publication Date: 2013-Jan-31
Document File: 2 page(s) / 79K

Publishing Venue

The IP.com Prior Art Database

Abstract

Using laparoscopic articulating medical devices can be challenging. Due to the small field of view provided by the endoscope during laparoscopic surgery, it is difficult to visualize the shaft angle of an articulating device. This becomes particularly difficult for the surgeon when the need arises to remove the articulating instrument from the trocar, as removing the instrument while articulated can cause the trocar to be removed from the patient causing loss of pneumoperitoneum. There is also a risk that trying to remove the instrument while articulated can cause damage to the instrument due to rubbing against the tip of the trocar. Therefore, it is desirable to communicate to the surgeon when the instrument is in the straight (unarticulated) position and is safe to remove from the trocar. This article describes a tactile feedback detent to communicate to the surgeon when the shaft is in the straight position.

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Detent for Articulation

Using laparoscopic articulating medical devices can be challenging. Due to the small field of view provided by the endoscope during laparoscopic surgery, it is difficult to visualize the shaft angle of an articulating device. This becomes particularly difficult for the surgeon when the need arises to remove the articulating instrument from the trocar, as removing the instrument while articulated can cause the trocar to be removed from the patient causing loss of pneumoperitoneum. There is also a risk that trying to remove the instrument while articulated can cause damage to the instrument due to rubbing against the tip of the trocar. Therefore, it is desirable to communicate to the surgeon when the instrument is in the straight (unarticulated) position and is safe to remove from the trocar. This article describes a tactile feedback detent to communicate to the surgeon when the shaft is in the straight position.

The image below details the detent that provides tactile feedback to the surgeon. The detent is mounted concentrically to the articulation control. This allows the detent and articulation control to move together when the motion is perpendicular to the axial (longitudinal) direction. However, the detent is also mounted, via tab and slot or boss and hole, to the shrouds. This mounting locates the detent in the axial direction. There is enough clearance in the tab and slot to allow the articulation control/detent assembly to move per...