Vessel sealer and divider with non-conductive stop members

• US 20040122423A1
• Filed: 09/11/2003
• Published: 06/24/2004
• Est. Priority Date: 04/06/2001
• Status: Active Grant

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Dycus, Sean T., Buysse, Steven Paul, Brown, Dax D.
• Granted Patent: US 7,473,253 B2
• Time in Patent Office: Days
• US Class Current: 606/51
• CPC Class Codes: A61B 17/32 Surgical cutting instruments A61B18/042 takes precedence; suture cutters A61B17/0467; instruments for ligaturing or cutting A61B17/128; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 18/1482 having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
• CPC Class Codes: A61B 2017/00539 hydraulically
• CPC Class Codes: A61B 2017/2926 Details of heads or jaws
• CPC Class Codes: A61B 2018/00077 high, i.e. electrically conducting
• CPC Class Codes: A61B 2018/00178 Electrical connectors
• CPC Class Codes: A61B 2018/00196 reciprocating lengthwise
• CPC Class Codes: A61B 2018/00404 Blood vessels other than those in or around the heart
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/126 bipolar
• CPC Class Codes: A61B 2018/1412 Blade
• CPC Class Codes: A61B 2018/1455 having a moving blade for cutting tissue grasped by the jaws
• CPC Class Codes: A61B 2018/1861 with an instrument inserted into a body lumen or cavity, e.g. a catheter
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 90/03 Automatic limiting or abutting means, e.g. for safety

Abstract

An endoscopic bipolar forceps for sealing and dividing tissue includes an elongated shaft having opposing jaw members at a distal end thereof. The jaw members are movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween. The jaws members are connected to a source of electrical energy such that the jaw members are capable of conducting energy through tissue held therebetween to effect a tissue seal. At least one non-conductive and spaced-apart stop member is disposed on an inner-facing surface of the jaw members to regulate the gap distance between the jaw members when tissue is held therebetween. The forceps also includes a longitudinally reciprocating knife which severs the tissue after sealing at a location which is proximate the sealing site.

Claims

1. An endoscopic bipolar forceps for sealing and dividing tissue, comprising:

an elongated shaft having opposing jaw members at a distal end thereof, the jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;

a source of electrical energy connected to each jaw member such that the jaw members are capable of conducting energy through tissue held therebetween to effect a seal;

at least one non-conductive stop member disposed on an inner facing surface of at least one of the jaw members which controls the distance between the jaw members when tissue is held therebetween; and

a longitudinally reciprocating knife for severing tissue proximate the seal.

2. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein the forceps includes at least two stop members disposed on the inner facing surface of at least one, of the jaw members.

3. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein at least one of the jaw members includes an electrically conductive surface having a longitudinally-oriented channel defined therein which facilitates longitudinal reciprocation of the knife for severing tissue.

4. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein the stop member is manufactured from the group consisting of:

parylene, nylon and ceramic.

5. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 2 wherein the stop members include a series of longitudinally-oriented projections which extend from a proximal end of the jaw member to a distal end of the jaw member.

6. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 2 wherein the stop members include a series of circle-like tabs which extend from a proximal end of the jaw member to a distal end of the jaw member.

7. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 6 wherein the circle-like tabs are disposed in an alternating, laterally-offset manner relative to one another along a length of the jaw member.

8. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein the stop member protrudes about 0.001 inches to about 0.005 inches from the inner facing surface of the jaw member.

9. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein the stop member protrudes about 0.002 inches to about 0.003 inches from the inner facing surface of the jaw member.

10. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein the stop member is affixed to the jaw member by thermal spraying.

11. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein the stop member is affixed to the jaw member by an adhesive.

12. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein the stop member is affixed to the jaw member by a molding process.

13. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein the forceps includes a drive rod assembly which connects the jaw members to the source of electrical energy such that the first jaw member has a first electrical potential and the second jaw member has a second electrical potential;

and

a handle attached to the drive rod assembly for imparting movement of the first and second jaw members from the first and second positions.

14. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 13 wherein the forceps includes a trigger which longitudinally reciprocates the knife to sever tissue proximate the seal.

15. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 1 wherein a first stop member is disposed on the electrically conductive surface of one of the jaw members and at least one second stop member is disposed on the electrically conductive surface of the other jaw member.

16. An endoscopic bipolar forceps for sealing and dividing tissue according to claim 3 wherein at least one stop member is disposed on the electrically conductive surface of the jaw member proximate one side of the longitudinally-oriented channel and at least one stop member is disposed on the electrically conductive surface of the jaw member proximate another side of the longitudinally-oriented channel.

17. An endoscopic bipolar forceps for sealing and dividing tissue, comprising:

at least one elongated shaft having opposing jaw members at a distal end thereof, the jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;

a drive rod assembly which connects the jaw members to a source of electrical energy such that the first jaw member has a first electrical potential and the second jaw member has a second electrical potential and the jaw members are capable of conducting energy through tissue held therebetween to effect a seal;

a handle attached to the drive rod assembly for imparting movement of the first and second jaw members from the first and second positions;

at least one non-conductive and spaced-apart stop member disposed on an inner facing surface of at least one of the jaw members which controls the distance between the jaw members when tissue is held therebetween; and

a trigger which mechanically activates a knife for severing tissue proximate the seal.