Hand-held instrument with dual zone fluid removal

Patent metadata

Field	Value
Publication number	US-11617611-B2
Application number	US-201715599273-A
Country	US
Kind code	B2
Filing date	May 18, 2017
Priority date	Jun 17, 2016
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

An electrosurgical instrument has dual zone smoke evacuation for providing efficient capture and evacuation of smoke generated during an electrosurgical procedure. A hand piece with a proximal and a distal end is coupled to a front piece having a distal opening leading into an interior conduit. An extendable section is at least partially disposed within the interior conduit and extends distally out of the distal opening of the front piece. The extendable section is selectively translatable within the interior conduit. A negative pressure source enables the capture and evacuation of smoke through both the extendable section and the interior conduit.

First claim

What is claimed is:

1. A hand-held instrument, comprising:
a hand piece having a proximal end, a distal end, and an interior conduit;
a front piece coupled to or integrated with the hand piece in a stationary position relative to the hand piece, the front piece having a distal opening leading into the interior conduit of the hand piece, the distal opening having an inner surface with a first dimension;
an extendable section at least partially disposed within the interior conduit of the hand piece and extending distally out of the distal opening of the front piece, the extendable section being configured for selective translation relative to the hand piece between a fully retracted position and a fully extended position, the extendable section having an outer surface with a second dimension, the second dimension being smaller than the first dimension such that a gap is formed between at least a portion of the inner surface of the distal opening in the front piece and the outer surface of the extendable section, the extendable section having a distally facing opening leading into an extendable section conduit; and
a negative pressure source configured to be in fluid communication with an atmosphere exterior of the hand-held instrument simultaneously through both the distal opening in the front piece via the interior conduit and the distally facing opening in the extendable section conduit via the extendable section conduit, the negative pressure source enabling:
the extendable section to function as a first fluid evacuation component, such that fluid can be drawn into the distally facing opening of the extendable section and through the extendable section conduit via the negative pressure source;
the gap and the interior conduit to function as a second fluid evacuation component, such that fluid can be drawn into the gap and through the interior conduit via the negative pressure source, wherein the gap is open directly to an the atmosphere exterior of the hand piece such that fluid can be drawn into the interior conduit directly through the gap without the fluid passing through the extendable section conduit,

wherein selective translation of the extendable section relative to the hand piece varies a distance between the first fluid evacuation component and the second fluid evacuation component.

2. The hand-held instrument of claim 1 , further comprising an electrode tip disposed at a distal end of the extendable section, the electrode tip configured to transmit electrical energy to target tissue.

3. The hand-held instrument of claim 1 , wherein the extendable section is selectively translatable along an axis extending from the proximal end to the distal end of the hand piece.

4. The hand-held instrument of claim 1 , wherein the negative pressure source is a vacuum hose attached to the hand piece, the vacuum hose being configured to convey away fluid drawn into one or both of the interior conduit and the extendable section conduit.

5. The hand-held instrument of claim 4 , wherein the vacuum hose is part of a utility conduit, and the utility conduit is coupled to the hand piece.

6. The hand-held instrument of claim 5 , wherein the utility conduit is coupled to the hand piece at a utility conduit coupler disposed at or near the proximal end of the hand piece.

7. The hand-held instrument of claim 1 , further comprising a utility conduit coupled to the hand piece and configured to connect a power cable and a vacuum hose to the electrosurgical instrument.

8. The hand-held instrument of claim 1 , wherein the extendable section is formed from a conductive material.

9. The hand-held instrument of claim 1 , wherein the front piece is formed with a tapered profile that tapers inwardly in a distal direction.

10. The hand-held instrument of claim 1 , wherein the front piece includes one or more supports configured to hold or stabilize the extendable section in position relative to the front piece.

11. The hand-held instrument of claim 10 , wherein the one or more supports are configured to frictionally maintain the position of the extendable section during operation of the hand-held instrument while allowing selective translation of the extendable section upon hand- applied force.

12. The hand-held instrument of claim 10 , wherein the one or more supports are formed as inwardly extending radial extensions.

13. The hand-held instrument of claim 1 , wherein the interior conduit is configured in size and shape to enclose the portions of the extendable section not extending distally beyond the hand piece.

14. The hand-held instrument of claim 1 , wherein the front piece is disposed at the distal end of the hand piece.

15. The hand-held instrument of claim 1 , further comprising a back stop configured to limit proximal translation of the extendable section within the interior conduit, and a front stop configured to limit distal movement of the extendable section within the interior conduit.

16. The hand-held instrument of claim 1 , further comprising a connector joined to or integrated with the extendable section at a proximal end of the extendable section, the connector including one or more projections extending radially outwardly to an interior wall of the interior conduit and being configured to maintain the position of the extendable section relative to the interior conduit through friction.

17. The hand-held instrument of claim 16 , wherein the connector is configured to frictionally maintain the position of the extendable section during operation of the hand-held instrument while allowing selective translation and rotation of the extendable section upon hand- applied force.

18. The hand-held instrument of claim 1 , wherein the extendable section is formed with a length about the same length of the hand piece.

19. A hand-held instrument, comprising:
a hand piece having a proximal end and a distal end;
a first fluid evacuation component configured to be selectively translatable relative to the hand piece between a fully retracted position and a fully extended position, the first fluid evacuation component including a first conduit having a proximal opening and a distal opening, the first conduit extending distally from the hand piece and extending at least partially into the interior of the hand piece, wherein, via a negative pressure source, the first conduit is configured to direct fluid captured through the distal opening into the hand piece through the proximal opening; and
a second fluid evacuation component having a stationary positional relationship with the hand piece, the second fluid evacuation component including a second conduit having a distal opening in fluid communication with an atmosphere exterior of the hand-held instrument, the second conduit extending into the interior of the hand piece, wherein, via the negative pressure source, the second conduit is configured to direct fluid captured through the distal opening of the second conduit into the hand piece, the second conduit extending at least partially between the hand piece and the first fluid evacuation component, the distal opening of the second conduit being completely closed off to the atmosphere exterior of the hand-held instrument only when the first fluid evacuation component is selectively translated to the fully extended position thereby preventing fluid evacuation through the second fluid evacuation component.

20. The hand-held instrument of claim 19 , wherein closing off the distal opening of the second conduit is configured to increase a negative pressur

Assignees

• Megadyne Med Prod Inc
• Megadayne Medical Products Inc

Inventors

• Greep Darcy W
• Frampton Chad S

Classifications

• A61M1/76

  Handpieces (specially for suction-irrigation A61M1/774, aspiration tips A61M1/84) · CPC title

• A61B2018/00607

  Coagulation and cutting with the same instrument · CPC title

• A61B2018/00922

  by switching or controlling the treatment energy directly within the hand-piece · CPC title

• A61B2218/008

  for smoke evacuation · CPC title

• A61B18/1402 Primary

  Probes for open surgery · CPC title