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Endocutter Transection Force Estimation

IP.com Disclosure Number: IPCOM000244145D
Publication Date: 2015-Nov-13
Document File: 2 page(s) / 140K

Publishing Venue

The IP.com Prior Art Database

Abstract

In surgery the variability of tissue introduces many situations in which the Endocutter cartridgeselection may not be of adequate size It would be advantageous if feedback was given to the surgeon tolet him or her know if the cartridge size selected my not be adequate for the specific tissue clamped onby the device One potential indicator for tissue type is the input force on the knife during a transection It is possible to develop a transfer function between input force and tissue type that could be used toindicate when the cartridge is not adequate for the tissue type Additionally putting too much inputforce on the knife can damage the device Monitoring the input force can prevent this from occurring

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Endocutter Transection Force Estimation 

Summary 

In surgery, the variability of tissue introduces many situations in which the Endocutter cartridge  selection may not be of adequate size. It would be advantageous if feedback was given to the surgeon to  let him or her know if the cartridge size selected my not be adequate for the specific tissue clamped on  by the device. One potential indicator for tissue type is the input force on the knife during a transection.  It is possible to develop a transfer function between input force and tissue type that could be used to  indicate when the cartridge is not adequate for the tissue type. Additionally, putting too much input  force on the knife can damage the device. Monitoring the input force can prevent this from occurring.  Description 
One embodiment of measuring force utilizes the velocity response of the firing system, if the force  versus speed and speed versus voltage transfer functions are known. The software applies a known  voltage, for which an ideal speed is expected for an unloaded condition (given from the transfer  function). After the knife has traveled a certain distance, the time and displacement are used to  calculate the actual speed of the knife. This will deviate from expected due to tissue f...