Patent DE2435123A1 successfully refreshed from Google Patents.
Patent GB2060397A successfully refreshed from Google Patents.
GB2060397A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Non-adherent surgical instrument and method
Assignee: Individual
•
Filing: 1980-08-29
•
Granted: —
•
Expires: 2000-08-29
Abstract
Abstract Method and means are disclosed for preventing tissue from adhering to surgical apparatus (e.g. a heated surgical scalpel) while operating at tissue temperatures (usually 100-500 DEG C) at which haemostasis with minimal tissue damage occurs, and include interposing between the surgical apparatus 11 and the tissue 13 being heated thereby a non-adherent coating 12 which has specific parameters including thermal impedance, thickness and thermal drop thereacross. The coating 12 may be of fluorocarbon polymers, silicones, metallic fluorides or organic phosphates, or may be a sacrificial solid or liquid layer of waxes, greases, oils or other fluorinated polymers or silicones. <IMAGE>
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 01:56
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/08; A61B18/082; A61B18/085; A61B2018/00053; A61B2018/00107; A61B2018/00964; A61B2018/0097
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
73 words
Surgical apparatus for non-adherently contacting tissue to heat the tissue in contact therewith to an elevated temperature at which hemostasis with minimal tissue damage occurs comprising:
heating means operable at an elevated temperature for heating the tissue; and
non-adherent coating means disposed to be intermediate the heating means and the tissue being heated thereby; said non-adherent coating means having a thermal impedance that is not substantially greater than 5 . cm2
5
watt
Claim 2
Dependent Claim
73 words
Surgical apparatus for non-adherently contacting tissue to heat the tissue in contact therewith to an elevated temperature at which hemostasis with minimal tissue damage occurs comprising:
heating means operable at an elevated temperature for heating the tissue; and
non-adherent coating means disposed to be intermediate the heating means and the tissue being heated thereby; said non-adherent coating means having a thermal impedance that is not substantially greater than 5 . cm2
5
watt
Claim 3
Dependent Claim
69 words
Surgical apparatus for non-adherently contacting tissue to heat the tissue in contact therewith to an elevated temperature at which hemostasis with minimal tissue damage occurs, comprising:
heating means operable at an elevated temperature for heating the tissue; and
non-adherent coating means disposed to be intermediate the heating means and the tissue being heated thereby; said non-adherent coating means having a thickness that is not substantially greater than .0025 cm.
Claim 4
Dependent Claim
69 words
Surgical apparatus for non-adherently contacting tissue to heat the tissue in contact therewith to an elevated temperature at which hemostasis with minimal tissue damage occurs, comprising:
heating means operable at an elevated temperature for heating the tissue; and
non-adherent coating means disposed to be intermediate the heating means and the tissue being heated thereby; said non-adherent coating means having a thickness that is not substantially greater than .0025 cm.
Claim 5
Dependent Claim
90 words
Surgical apparatus for non-adherently contacting tissue to heat the tissue in contact therewith to an elevated temperature at which hemostasis with minimal tissue damage occurs, comprising:
heating means operable at an elevated temperature for heating the tissue; and
non-adherent coating means disposed to be intermediate the heating means and the tissue being heated thereby; said non-adherent coating means having a thermal drop thereacross while in contact with tissue that is not substantially greater than 50 C. for tissue temperatures within the range from about 1 000C to about 500 C.
Claim 6
Dependent Claim
90 words
Surgical apparatus for non-adherently contacting tissue to heat the tissue in contact therewith to an elevated temperature at which hemostasis with minimal tissue damage occurs, comprising:
heating means operable at an elevated temperature for heating the tissue; and
non-adherent coating means disposed to be intermediate the heating means and the tissue being heated thereby; said non-adherent coating means having a thermal drop thereacross while in contact with tissue that is not substantially greater than 50 C. for tissue temperatures within the range from about 1 000C to about 500 C.
Claim 7
Dependent Claim
93 words
Surgical apparatus for non-adherently contacting tissue to heat the tissue in contact therewith to an elevated temperature at which hemostasiswith minimal tissue damage occurs, comprising;
heating means operable at an elevated temperature for heating the tissue; and
non-adherent coating means disposed to be intermediate the heating means and the tissue being heated thereby; said non-adherent coating means having a maximum allowed thickness, t, in centimeters as given by the relationship: 50 ~ k
(qua) where k is thermal conductivity of the non-adherent coating in watts/cm0C., and O/A is the heat flux in watts/cm2.
Claim 8
Dependent Claim
93 words
Surgical apparatus for non-adherently contacting tissue to heat the tissue in contact therewith to an elevated temperature at which hemostasiswith minimal tissue damage occurs, comprising;
heating means operable at an elevated temperature for heating the tissue; and
non-adherent coating means disposed to be intermediate the heating means and the tissue being heated thereby; said non-adherent coating means having a maximum allowed thickness, t, in centimeters as given by the relationship: 50 ~ k
(qua) where k is thermal conductivity of the non-adherent coating in watts/cm0C., and O/A is the heat flux in watts/cm2.
Claim 9
Dependent Claim
25 words
Surgical apparatus according to any of claims 1 to 4 wherein the non-adherent coating means includes a composition selected from fluorocarbon polymers and silicone polymers.
Claim 10
Dependent Claim
26 words
Surgical apparatus according to any one of claims 1 to 4 wherein the non-adherent coating means includes a composition selected from organic phosphates and metallic fluorides.
Claim 11
Independent Claim
60 words
A method of preventing adherence of surgical apparatus to tissue at an elevated temperature at which hemostasis with minimal tissue damage occurs, the method comprising the steps of:
transferring heat to the tissue from the surgical apparatus; and
interposing between the tissue and the surgical apparatus a non-adherent coating having a thickness which is not substantially greater than .0025 cm.
Claim 12
Independent Claim
60 words
A method of preventing adherence of surgical apparatus to tissue at an elevated temperature at which hemostasis with minimal tissue damage occurs, the method comprising the steps of:
transferring heat to the tissue from the surgical apparatus; and
interposing between the tissue and the surgical apparatus a non-adherent coating having a thickness which is not substantially greater than .0025 cm.
Claim 13
Independent Claim
86 words
A method of preventing adherence of surgical apparatus to tissue at an elevated temperature at which hemostasis with minimal tissue damage occurs, the method comprising the steps of:
transferring heat to the tissue from the surgical apparatus; and
interposing between the tissue and the surgical apparatus a non-adherent coating having a maximum allowed thickness, t, in centimeters as given by the relationship: 50 ~ k
(via) where k is thermal conductivity of the non-adherent coating in watts/cm C., and QIA is the heat flux in watts/cm2.
Claim 14
Independent Claim
86 words
A method of preventing adherence of surgical apparatus to tissue at an elevated temperature at which hemostasis with minimal tissue damage occurs, the method comprising the steps of:
transferring heat to the tissue from the surgical apparatus; and
interposing between the tissue and the surgical apparatus a non-adherent coating having a maximum allowed thickness, t, in centimeters as given by the relationship: 50 ~ k
(via) where k is thermal conductivity of the non-adherent coating in watts/cm C., and QIA is the heat flux in watts/cm2.
Claim 15
Independent Claim
62 words
A method of preventing adherence of surgical apparatus to tissue at an elevated temperature at which hemostasis with minimal tissue damage occurs, the method comprising the steps of:
transferring heat to the tissue from the surgical apparatus; and
interposing between the tissue and the surgical apparatus a non-adherent coating having a thermal impedance which is not substantially greater than 5 cm2 watt
Claim 16
Independent Claim
62 words
A method of preventing adherence of surgical apparatus to tissue at an elevated temperature at which hemostasis with minimal tissue damage occurs, the method comprising the steps of:
transferring heat to the tissue from the surgical apparatus; and
interposing between the tissue and the surgical apparatus a non-adherent coating having a thermal impedance which is not substantially greater than 5 cm2 watt
Claim 17
Dependent Claim
80 words
A me.l1odi of preventing adherence of surgical apparatusto tissue at an elevated temperature at which hemostasis with minimal tissue damage occurs, the method comprising the steps of:
transferring heat to the tissue from the surgical apparatus; and
interposing between the tissue and the surgical apparatus a non-adherent coating having a thermal drop thereacross while in contact with tissue that is not substantially greater than 50 C. for tissue temperatures within the range from about 100 C to about 500 C.
Claim 18
Dependent Claim
80 words
A me.l1odi of preventing adherence of surgical apparatusto tissue at an elevated temperature at which hemostasis with minimal tissue damage occurs, the method comprising the steps of:
transferring heat to the tissue from the surgical apparatus; and
interposing between the tissue and the surgical apparatus a non-adherent coating having a thermal drop thereacross while in contact with tissue that is not substantially greater than 50 C. for tissue temperatures within the range from about 100 C to about 500 C.
Claim 19
Dependent Claim
12 words
Surgical apparatus substantially as hereinbefore described with reference to the accompanying drawings.
Claim 20
Dependent Claim
12 words
Surgical apparatus substantially as hereinbefore described with reference to the accompanying drawings.
Claim 21
Independent Claim
31 words
A method of preventing adherence of surgical tissue at an elevated temperature at which
hemostasis with minimal tissue damage occurs,
substantially as hereinbefore described with refer
ence to the accompanying drawings.
Claim 22
Independent Claim
31 words
A method of preventing adherence of surgical tissue at an elevated temperature at which
hemostasis with minimal tissue damage occurs,
substantially as hereinbefore described with refer
ence to the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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