Medical instrument having medical-treatment electrode

• US 20060173402A1
• Filed: 02/01/2005
• Published: 08/03/2006
• Est. Priority Date: 02/01/2005
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Weizman, Patrick, Cropper, Michael S.
• Granted Patent: US 7,278,992 B2
• Time in Patent Office: Days
• US Class Current: 604/21
• CPC Class Codes: A61B 1/2736 Gastroscopes
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2018/00482 Digestive system
• CPC Class Codes: A61B 2018/1425 Needle

Abstract

A first medical instrument includes a medical catheter, a rotatable member, an injection needle, and at least one medical-treatment electrode supported by the rotatable member. The medical catheter has a distal end. The rotatable member is connected to the medical catheter and is rotatable with respect to the medical catheter. The injection needle is movable to extend from, and to retract within, the distal end of the medical catheter. A second endoscope adjunct includes a medical catheter, a rotatable member, and at least one medical-treatment electrode supported by the rotatable member. The medical catheter has a distal end and has a lumen adapted to receive the injection needle. The rotatable member is connected to the medical catheter is rotatable with respect to the medical catheter.

Claims

1. A medical instrument comprising:

a) a medical catheter having a distal end;

b) a rotatable member connected to the medical catheter proximate the distal end of the medical catheter and rotatable with respect to the medical catheter between a first rotational position and a second rotational position;

c) an injection needle movable to extend from, and to retract within, the distal end of the medical catheter for at least one of the first and second rotational positions of the rotatable member; and

d) at least one medical-treatment electrode supported by the rotatable member.

2. The medical instrument of claim 1, wherein, in the first rotational position, the rotatable member is substantially aligned with the distal end of the medical catheter and extends distal of the distal end of the medical catheter.

3. The medical instrument of claim 2, wherein the rotatable member has a distal end, and wherein the injection needle is movable to extend from the distal end of the medical catheter and from the distal end of the rotatable member when the rotatable member is in the first rotational position.

4. The medical instrument of claim 2, wherein, in the second rotational position, the rotatable member is substantially aligned with the distal end of the medical catheter and extends proximal of the distal end of the medical catheter.

5. The medical instrument of claim 4, wherein the rotatable member has a distal end, and wherein the injection needle is movable to extend from the distal end of the medical catheter when the rotatable member is in the second rotational position.

6. The medical instrument of claim 4, wherein the rotatable member has a third rotational position substantially midway between the first and second rotational positions.

7. The medical instrument of claim 4, wherein the at-least-one medical-treatment electrode includes spaced-apart first and second medical-treatment electrodes.

8. A method for substantially stopping bleeding in patient tissue, using the medical instrument of claim 7, comprising the steps of:

a) inserting the distal end of the medical catheter into the working channel opening of an endoscope with the injection needle retracted within the distal end of the medical catheter and with the rotatable member rotated to one of the first and second rotational positions;

b) after step a), extending the injection needle and delivering a vasoconstrictor drug through the injection needle to the patient tissue;

c) after step b), retracting the injection needle;

d) after step c), rotating the rotatable member to a rotational position different from the one of the first and second rotational positions; and

e) after step d), medically treating the patient tissue using the first and second medical-treatment electrodes to substantially stop bleeding in the patient tissue.

9. The medical instrument of claim 1, wherein the rotatable member has a distal end, and wherein the rotatable member has a shape of an annular circular segment having an inner radius when viewed on the distal end of the rotatable member, wherein the medical catheter has an outer radius, and wherein the inner radius is substantially equal to the outer radius.

10. The medical instrument of claim 9, wherein the rotatable member is substantially transparent.

11. A medical instrument comprising:

a) a medical catheter having a distal end and having a lumen adapted to receive an injection needle movable in the lumen to extend from, and to retract within, the distal end of the medical catheter;

b) a rotatable member connected to the medical catheter proximate the distal end of the medical catheter and rotatable with respect to the medical catheter between a first rotational position and a second rotational position; and

c) at least one medical-treatment electrode supported by the rotatable member.

12. The medical instrument of claim 11, wherein, in the first rotational position, the rotatable member is substantially aligned with the distal end of the medical catheter and extends distal of the distal end of the medical catheter.

13. The medical instrument of claim 12, wherein the rotatable member has a distal end, and wherein the injection needle is part of an injection-needle device, wherein the medical instrument also includes a handle having an injection-needle port in communication with the lumen, and wherein the injection needle is manually insertable into the injection-needle port and manually movable in the lumen to extend from the distal end of the medical catheter and from the distal end of the rotatable member when the rotatable member is in the first rotational position.

14. The medical instrument of claim 12, wherein, in the second rotational position, the rotatable member is substantially aligned with the distal end of the medical catheter and extends proximal of the distal end of the medical catheter.

15. The medical instrument of claim 14, wherein the rotatable member has a distal end, and wherein the injection needle is part of an injection-needle device, wherein the medical instrument also includes a handle having an injection-needle port in communication with the lumen, and wherein the injection needle is manually insertable into the injection-needle port and manually movable in the lumen to extend from the distal end of the medical catheter when the rotatable member is in the second rotational position.

16. The medical instrument of claim 14, wherein the rotatable member has a third rotational position substantially midway between the first and second rotational positions.

17. The medical instrument of claim 14, wherein the at-least-one medical-treatment electrode includes spaced-apart first and second medical-treatment electrodes.

18. A method for substantially stopping bleeding in patient tissue, using the medical instrument of claim 13, comprising the steps of:

a) inserting the distal end of the medical catheter into the working channel opening of an endoscope with the rotatable member rotated to one of the first and second rotational positions;

b) after step a), manually inserting the injection needle into the injection-needle port of the handle of the medical catheter, manually moving the injection needle in the lumen of the medical catheter, and delivering a vasoconstrictor drug through the injection needle to the patient tissue;

c) after step b), manually retracting the injection needle;

d) after step c), rotating the rotatable member to a rotational position different from the one of the first and second rotational positions; and

e) after step d), medically treating the patient tissue using the at-least-one medical-treatment electrode to substantially stop bleeding in the patient tissue.

19. The medical instrument of claim 11, wherein the rotatable member has a distal end, and wherein the rotatable member has a shape of an annular circular segment having an inner radius when viewed on the distal end of the rotatable member, wherein the medical catheter has an outer radius, and wherein the inner radius is substantially equal to the outer radius.

20. The medical instrument of claim 19, wherein the rotatable member is substantially transparent.