CA2733154A1 - Electrosurgical instrument - Google Patents

Electrosurgical instrument Download PDF

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Publication number
CA2733154A1
CA2733154A1 CA2733154A CA2733154A CA2733154A1 CA 2733154 A1 CA2733154 A1 CA 2733154A1 CA 2733154 A CA2733154 A CA 2733154A CA 2733154 A CA2733154 A CA 2733154A CA 2733154 A1 CA2733154 A1 CA 2733154A1
Authority
CA
Canada
Prior art keywords
tissue
conductive
jaw structure
matrix
jaw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2733154A
Other languages
French (fr)
Other versions
CA2733154C (en
Inventor
Csaba Truckai
John H. Shadduck
James A. Baker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SurgRx Inc
Original Assignee
SurgRx Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SurgRx Inc filed Critical SurgRx Inc
Publication of CA2733154A1 publication Critical patent/CA2733154A1/en
Application granted granted Critical
Publication of CA2733154C publication Critical patent/CA2733154C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1442—Probes having pivoting end effectors, e.g. forceps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00059—Material properties
    • A61B2018/00071—Electrical conductivity
    • A61B2018/00077—Electrical conductivity high, i.e. electrically conducting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00059—Material properties
    • A61B2018/00071—Electrical conductivity
    • A61B2018/00083—Electrical conductivity low, i.e. electrically insulating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00107—Coatings on the energy applicator
    • A61B2018/00125—Coatings on the energy applicator with nanostructure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00107—Coatings on the energy applicator
    • A61B2018/00148—Coatings on the energy applicator with metal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/0063—Sealing

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Otolaryngology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

An electrosurgical medical device and method (Fig. 8A) for creating thermal welds in engaged tissue. In one embodiment, at least one jaw of the instrument defines a tissue engagement plane carrying a conductive-resistive matrix of a conductively-doped non-conductive elastomer. The engagement surface portions thus can be described as a positive temperature coefficient material that has a unique selected decreased electrical conductance at each selected increased temperature thereof over a targeted treatment range. The conductive-resistance matrix can be engineered to bracket a targeted thermal treatment range, for example about 60°C to 80°C, at which tissue welding can be accomplished. In one mode of operation, the engagement plane will automatically modulate and spatially localize ohmic heating within the engaged tissue from Rf energy application-across-micron-scale portions of the engagement surface (155A). In another mode of operation, a conductive-resistive matrix can induce a "wave" of Rf energy density to sweep across the tissue to thereby weld tissue

Claims (9)

1. An electrosurgical jaw structure for controlled application of energy to tissue, comprising:
first and second jaws movable between opened and closed positions, each jaw defining an engagement surface layer for contacting tissue;
at least a part of an engagement surface layer comprising a matrix of a first portion and second portion each in a selected proportion of the matrix volume;
said first portion being an electrically non-conductive material;
said second portion being electrically conductive and having a spatial distribution within the first portion of said matrix; and an electrical conductor in contact with said matrix.
2. The jaw structure of claim 1, wherein said first portion is an elastomeric material.
3. The jaw structure of claim 1, wherein said first portion is silicone.
4. The jaw structure of claim 1, wherein the first portion is a thermoplastic polymer.
5. The jaw structure of claim 1, wherein the first portion is a ceramic.
6. The jaw structure of claim 1, further comprising an electrical source operatively coupled to said electrical conductor for providing electrical potential thereto.
7. The jaw structure of claim 1, wherein the second portion is a conductive particle having a dimension across a principal axis ranging between about 1 nanometer and 1000 microns.
8. The jaw structure of claim 1, wherein the second portion is a conductive particle having a dimension across a principal axis ranging between about 1 nanometer and 100 microns.
9. The jaw structure of claim 1, wherein the second portion is a conductive particle having a dimension across a principal axis ranging between about 1 nanometer and 10 microns.
CA2733154A 2002-01-22 2003-01-22 Electrosurgical instrument Expired - Fee Related CA2733154C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US35151702P 2002-01-22 2002-01-22
US60/351,517 2002-01-22
US36699202P 2002-03-20 2002-03-20
US60/366,992 2002-03-20
CA2473798A CA2473798C (en) 2002-01-22 2003-01-22 Electrosurgical instrument and method of use

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA2473798A Division CA2473798C (en) 2002-01-22 2003-01-22 Electrosurgical instrument and method of use

Publications (2)

Publication Number Publication Date
CA2733154A1 true CA2733154A1 (en) 2003-07-31
CA2733154C CA2733154C (en) 2012-10-09

Family

ID=27616807

Family Applications (4)

Application Number Title Priority Date Filing Date
CA2733154A Expired - Fee Related CA2733154C (en) 2002-01-22 2003-01-22 Electrosurgical instrument
CA2473798A Expired - Fee Related CA2473798C (en) 2002-01-22 2003-01-22 Electrosurgical instrument and method of use
CA2733138A Expired - Fee Related CA2733138C (en) 2002-01-22 2003-01-22 Electrosurgical instrument and method of use
CA2733282A Expired - Fee Related CA2733282C (en) 2002-01-22 2003-01-22 Electrosurgical instrument and method of use

Family Applications After (3)

Application Number Title Priority Date Filing Date
CA2473798A Expired - Fee Related CA2473798C (en) 2002-01-22 2003-01-22 Electrosurgical instrument and method of use
CA2733138A Expired - Fee Related CA2733138C (en) 2002-01-22 2003-01-22 Electrosurgical instrument and method of use
CA2733282A Expired - Fee Related CA2733282C (en) 2002-01-22 2003-01-22 Electrosurgical instrument and method of use

Country Status (9)

Country Link
US (1) US7112201B2 (en)
EP (3) EP1474031B1 (en)
JP (1) JP4610902B2 (en)
AT (1) ATE540606T1 (en)
AU (1) AU2003205316A1 (en)
CA (4) CA2733154C (en)
ES (1) ES2378662T3 (en)
PT (1) PT1474031E (en)
WO (1) WO2003061456A2 (en)

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