Cryosurgical instrument
AssigneeErbe Elektromedizin GmbH
InventorsKlaus Fischer, Mara Szyrach, Markus Enderle
Life of this patent
Estimating the term…
Abstract
A cryosurgical instrument, in particular a biopsy instrument for transbronchial biopsy, having an elongated instrument base body with a distal and proximal end, in relation to the operational position, a cooled section close to the distal end and which removes tissue, said section being designed such that surrounding biological material adheres thereto, by means of cryoadhesion, when said instrument is in use in the cooled state, and a security section which is provided at a distance from the tissue removal section and which comprises means for preventing or reducing the adhesion of biological material.
Claims20
A cryosurgical instrument comprising:
- an elongated instrument base body having a distal end and a proximal end;
- a cooled tissue grasping section located close to the distal end, said tissue grasping section comprising a cryoadhesive portion having a first cross-section and configured such that surrounding biological material will adhere due to cryoadhesion when the instrument is being used in a cooled state;
- and
- a safety section provided distally from the tissue grasping section, said safety section comprising means for preventing or reducing the adhesion of biological material,
- wherein the tissue grasping section further comprises a border region having a cross-section that is smaller than both of the first cross-section and a cross-section of the safety section, thereby causing the border region to exhibit low thermal conductivity with respect to the cryoadhesive portion and reducing heat flow from the safety section to the cryoadhesive portion.
A cryosurgical instrument comprising:
- an elongated instrument base body having a distal end and a proximal end;
- a cooled tissue grasping section located close to the distal end, said tissue grasping section being configured such that surrounding biological material will adhere due to cryoadhesion when the instrument is being used in a cooled state;
- and
- a safety section provided distally from the tissue grasping section, said safety section comprising means for preventing or reducing the adhesion of biological material, and
- wherein a reduced cross-sectional surface at least in a border region of the tissue grasping section, directly adjacent to the safety section, is configured to provide low thermal conductivity between the tissue grasping section and the safety section.
A cryosurgical instrument comprising:
- an elongated instrument base body having a distal end and a proximal end;
- a safety section arranged at the distal end of the elongated instrument base body configured to prevent or reduce the adhesion of biological material;
- and
- a tissue grasping section arranged proximal of the safety section and configured such that surrounding biological material will adhere due to cryoadhesion when the cryosurgical instrument is used in a cooled state, the tissue grasping section having at a proximal end a first cross-section and at a distal end a second cross-section, the second cross-section being smaller than both of the first cross-section and a cross-section of the safety section, wherein the second cross-section is configured to provide low thermal conductivity thereby reducing the flow of cryoadhesion cooling to the safety section.
Dependencies are inferred from the claim text.