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Surgical Instrument Knife Lockout Disclosure Number: IPCOM000249225D
Publication Date: 2017-Feb-10
Document File: 5 page(s) / 419K

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Laparoscopic surgeries are commonly performed in developed countries as opposed to open surgery due to the improved outcomes for the patient in terms of postā€operative pain, recovery time, risk of infection, and topical scars. These surgeries dictate the insertion of instruments into the patient through trocars. The open lumen through the trocar by which a device may be inserted ranges from 5 mm to 12 mm, with smaller trocars being preferred by patients and many surgeons. Medical devices to perform these surgeries are becoming more feature rich allowing the surgeon better access to manipulate and treat tissue with a single instrument. Examples of these features include shaft rotation, shaft articulation, clamping, cutting, and coagulation.

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 Surgical Instrument Knife Lockout 



Laparoscopic surgeries are commonly performed in developed countries as opposed to open surgery  due to the improved outcomes for the patient in terms of post‐operative pain, recovery time, risk of  infection, and topical scars. These surgeries dictate the insertion of instruments into the patient through  trocars. The open lumen through the trocar by which a device may be inserted ranges from 5 mm to 12  mm, with smaller trocars being preferred by patients and many surgeons. Medical devices to perform  these surgeries are becoming more feature rich allowing the surgeon better access to manipulate and  treat tissue with a single instrument. Examples of these features include shaft rotation, shaft  articulation, clamping, cutting, and coagulation. 

While devices are becoming more capable, they are also becoming more complex as is diagnostic and  treatment equipment used in the operating room (OR). This added complexity represents an increased  cognitive load for the surgeon and OR staff. Increased cognitive load is a contributor to surgical errors  and increases the difficulty associated with safely training surgical residents. Surgical errors involving  inadvertent cutting are more difficult to manage in a laparoscopic case. The need to controlling  significant bleeding may lead to converting to open surgery, which has significant consequences for the  patient. A solution is needed to prevent inadvertent cutting with laparoscopic instruments to ensure  patient safety. 



Figure 1 shows the handle of a laparoscopic instrument, where the shrouds are transparent, revealing  the mechanisms inside the handle. Note the plurality of controls, shaft rotation, RF energy activation,  knife trigger, end effector closure handle, and shaft articulation.  


Figure 1: Instrument Handle 

Inadvertent tissue transection can be the result of button, or control, confusion on the part of the  surgeo...