THREADED TROCAR FOR ADAPTER ASSEMBLIES

• US 20190321045A1
• Filed: 03/13/2019
• Published: 10/24/2019
• Est. Priority Date: 04/23/2018
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Sgroi, JR., Anthony, Williams, Justin
• Granted Patent: US 11,160,556 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/1155 Circular staplers comprising a plurality of staples
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00845 of moving parts with respect to each other
• CPC Class Codes: A61B 2017/00991 Telescopic means
• CPC Class Codes: A61B 2017/3454 Details of tips
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself

Abstract

A trocar assembly for releasable engagement with an adapter assembly of a surgical stapling instrument includes a housing having a first end cap and a second end cap, a trocar member rotatably supported with the housing and movable between a retracted position and an advanced position, and a drive member rotatably supported within the housing. The trocar member includes a threaded body and defines a longitudinal channel. The drive member includes a drive portion received within the longitudinal channel of the trocar member. Rotation of the drive member causes longitudinal movement of the trocar member.

Claims

1. A trocar assembly for releasable engagement with an adapter assembly of a surgical stapling instrument, the trocar assembly comprising:

a housing including a first end cap and a second end cap;

a trocar member rotatably supported with the housing and movable between a retracted position and an advanced position, the trocar member including a threaded body and defining a longitudinal channel; and

a drive member rotatably supported within the housing and including a drive portion received within the longitudinal channel of the trocar member, wherein rotation of the drive member causes longitudinal movement of the trocar member.

2. The trocar assembly of claim 1, wherein the second end cap includes a threaded bore, the threaded body of the trocar member being received through the threaded bore to cause the longitudinal movement of the trocar member during rotation of the drive member.

3. The trocar assembly of claim 1, wherein the first end cap includes a bore and the drive member include an engagement portion received through the bore.

4. The trocar assembly of claim 1, wherein the drive member and the trocar member are longitudinally fixed relative to each other.

5. The trocar assembly of claim 4, wherein rotation of the drive member in a first direction cause rotation advancement of the trocar member.

6. The trocar assembly of claim 5, wherein rotation of the drive member in a second direction causes retraction of the trocar member.

7. The trocar assembly of claim 1, wherein the second end cap is configured to retain the trocar member within the housing.

8. The trocar assembly of claim 1, wherein the housing defines at least one slot for facilitating attachment of the trocar assembly within an adapter assembly.

9. The trocar assembly of claim 1, wherein a distal end of the trocar member is configured for operable engagement by an anvil assembly.

10. The trocar assembly of claim 9, wherein the distal end of the trocar member includes a tapered end.