Handheld electromechanical surgical system

Patent metadata

Field	Value
Publication number	US-2022008079-A1
Application number	US-202117361472-A
Country	US
Kind code	A1
Filing date	Jun 29, 2021
Priority date	Jun 9, 2017
Publication date	Jan 13, 2022
Grant date	—

Abstract

The present disclosure relates to adapter assemblies for use with and to electrically and mechanically interconnect electromechanical surgical devices and surgical reloads, and to surgical systems including handheld electromechanical surgical devices and adapter assemblies for connecting surgical reloads to the handheld electromechanical surgical devices.

First claim

1 - 7 . (canceled)

8 . A surgical device comprising:
a handle assembly including:
a power source;
a motor coupled to the power source; and
a controller configured to control the motor;
an adapter assembly configured to selectively couple to the handle assembly; a reload configured to selectively couple to a distal portion of the adapter assembly, the reload including a plurality of fasteners; and an anvil assembly selectively couplable to the distal portion of the adapter assembly, the anvil assembly being movable relative to the reload, wherein the controller is configured to control the motor to move the anvil assembly thereby compressing tissue between the anvil assembly and the reload at first speed for a first segment and at a second speed for a second segment, the second speed being slower than the first speed.

9 . The surgical device according to claim 8 , wherein the adapter assembly includes a strain gauge configured to measure strain, and wherein the controller is further configured to determine whether the anvil assembly is decoupled from the adapter assembly based on the measured strain during the second segment.

10 . The surgical device according to claim 9 , wherein the controller is further configured to move the anvil assembly at a variable speed during a third segment.

11 . The surgical device according to claim 10 , wherein the controller is further configured to determine a predicted clamping force based on a plurality of measured strain values.

12 . The surgical device according to claim 11 , wherein the controller is further configured to calculate the predicted clamping force from the plurality of measured strain values using a second-order predictive filter.

13 . The surgical device according to claim 12 , wherein the controller is further configured to adjust the variable speed based on a comparison of the predicted clamping force and a target clamping force.

14 . The surgical device according to claim 13 , wherein the controller is further configured to calculate a set speed during the third segment based on a difference between the target clamping force and the predicted clamping force.

15 . A surgical device comprising:
a handle assembly including:
a power source;
at least one motor coupled to the power source; and
a controller configured to control the motor;
an adapter assembly configured to selectively couple to the handle assembly, the adapter assembly including a strain gauge configured to measure strain; a reload configured to selectively couple to a distal portion of the adapter assembly, the reload including:
a plurality of fasteners;
an annular staple pusher for ejecting the plurality of fasteners; and
an anvil assembly selectively couplable to the distal portion of the adapter assembly, the anvil assembly being movable relative to the reload; wherein the controller is configured to control the motor to move the annular staple pusher based on the measured strain.

16 . The surgical device according to claim 15 , wherein the controller is configured to compare the measured strain to a minimum stapling force and a maximum stapling force during movement of the annular staple pusher.

17 . The surgical device according to claim 16 , wherein the controller is configured to determine presence of the plurality of fasteners based on the measured strain being below the minimum stapling force.

18 . The surgical device according to claim 16 , wherein the controller is configured to stop the motor in response to the measured strain exceeding the maximum stapling force.

19 . The surgical device according to claim 15 , wherein the reload further includes:
a circular knife independently movable relative to the annular staple pusher.

20 . The surgical device according to claim 19 , wherein the controller is configured to, at least one of:
control the motor to move the circular knife based on the measured strain; compare the measured strain to a target cutting force and a maximum cutting force during movement of the circular knife; or determine whether tissue was cut based on the measured strain being equal to or exceeding the target cutting force.

Assignees

• Covidien Lp

Inventors

• Mozdzierz Patrick
• Delbo James
• Firth Scott
• Hryb John
• Joyce Steven
• Kollar Charles
• Paul Stephen
• Richard Paul
• Sgroi Jr Anthony
• Valentine David

Classifications

• A61B2017/00477

  Coupling (A61B2017/0046 takes precedence) · CPC title

• A61B2017/07257

  characterised by its anvil · CPC title

• A61B2017/00119

  alarm; indicating an abnormal situation · CPC title

• A61B2017/00398

  using powered actuators, e.g. stepper motors, solenoids · CPC title

• A61B2090/064

  for measuring force, pressure or mechanical tension · CPC title