Hydraulic device with flexible body for surgical anastomosts

• US 4,962,877 A
• Filed: 08/30/1989
• Issued: 10/16/1990
• Est. Priority Date: 09/02/1988
• Status: Expired due to Fees

• Current Assignee: Pedro L. Hervas
• Original Assignee: Pedro L. Hervas
• Inventors: Hervas, Pedro L.
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): Jackson, Gary
• Application Number:
  US07/400,493
• Time in Patent Office: 412 Days
• Field of Search: 606/175-181, 227/19, 227/179, 227/180
• US Class Current: 227/179.1
• CPC Class Codes: A61B 17/115 Staplers for performing anastomosis in a single operation
• CPC Class Codes: A61B 2017/00539 hydraulically
• CPC Class Codes: A61B 2017/2905 flexible

Abstract

A hydraulic device, depending for performing mechanical anastomoses within the field of surgery, consisting of a head which sutures the ends to be anastomized by means of metal staples, hydraulically operated by means of plungers; a flexible body consisting of hydraulic conducting tubes which can be bent to allow anastomoses to be carried out in anatomical locations with difficult access for currently used rigid systems; and a control system which operates the fluid driving the head mechanisms; provided with a valve system to ensure proper stapling.

Claims

1. Hydraulic device with flexible body for surgical anastomosis, comprising a suturing and cutting head equipped to receive metal staples and a cylindrical blade, by means of which, driven by hydraulic fliud, the tissue is brought into close contact, sutured and the superfluous tissue cut off;

a hydraulically driven control mechanism for the operation of said head;

an intermediate body linking the head and control mechanism, including flexible hydraulic fluid tubes;

the hydraulic device being hydraulically operated without spring means located in the suturing and cutting head or intermediate body, and said intermediate body, made up of tubes, being sufficiently flexible to enable it to bend in order to facilitate the positioning of the head itself.

2. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 1, with the feature that the suturing and cutting head carries out the approximation of the tissues to be sutured, as well as stapling and inner cutting of same by means of plungers located in cylinder chambers driven by hydraulic fluid, one of the plungers contained in a double action cylinder chamber which drives hydraulic fluid when axially moved for the approximation and separation of the support head, and another plunger for pushing teeth which force out the staples to their final position, as well as pushing the blade for cutting superfluous tissue, both plungers having sealing means.

3. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 2, with the feature of having thin hydraulic conduction tubes which carry the hydraulic fluid between the suturing and cutting head and the flexible intermediate body, traversing the plunger contained in the double action cylinder located in the suturing and cutting head, thus avoiding the rotation of the same.

4. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 2, with the feature that the control mechanism is comprised of hydraulic fluid driving cylinders and plungers, one of the hydraulic fluid driving cylinders being double action and acting upon hydraulic fluid when its plunger is axially moved, and the operation of which by means of a handwheel screwed onto the shaft of the plunger located in the double action driving cylinder allows the approximation and separation of the support head of the head assembly, the position of the plunger'"'"'s shaft located in the double action driving cylinder being an indication of the degree of the closeness of the tissue, and another plunger whose action, independent of the former plunger, produces the hydraulic pressure for stapling and cutting of the tissue;

the surface ratio between the double action plungers located at the suturing and cutting head and at the control mechanism and the screw mechanism for moving the double action plunger in the suturing and cutting head allowing the operations to be carried out with little physical effort.

5. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 2, with the feature of having a valve in the control mechanism connected to the stapling hydraulic circuit which absorbs the excess pressure in said circuit, and indicating by its displacement that the stapling and cutting have been performed correctly.

6. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 1, with the feature of having thin hydraulic conduction tubes which carry the hydraulic fluid between the suturing and cutting head and the flexible intermediate body, traversing plunger contained in a double action cylinder located in the suturing and cutting head, thus avoiding the rotation of the same.

7. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 6, with the feature that the control mechanism is comprised of hydraulic fluid driving cylinders and plungers, one of the hydraulic fluid driving cylinders being double action and acting upon hydraulic fliud when its plunger is axially moved, and the operation of which by means of a handwheel screwed onto the shaft of the plunger located in the double action driving cylinder allows the approximation and separation of the support head of the head assembly, the position of the plunger'"'"'s shaft located in the double action driving cylinder being an indication of the degree of the closeness of the tissue, and another plunger whose action, independent of the former plunger, produces the hydraulic pressure for stapling and cutting of the tissue;

the surface ratio between the double action plungers located at the suturing and cutting head and at the control mechanism and the screw mechanism for moving the double action plunger in the suturing and cutting head allowing the operations to be carried out with little physical effort.

8. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 6, with the feature of having a valve in the control mechanism connected to the stapling hydraulic circuit which absorbs the excess pressure in said circuit, and indicating by its displacement that the stapling and cutting have been performed correctly.

9. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 1, with the feature that the control mechanism is comprised of hydraulic fluid driving cylinders and plungers, one of the hydraulic fluid driving cylinders being double action and acting upon hydraulic fluid when its plunger is axially moved, and the operation of which by means of a handwheel screwed onto the shaft of the plunger located in the double action driving cylinder allows the approximation and separation of the support head of the head assembly, the position of the plunger'"'"'s shaft located in the double action driving cylinder being an indication of the degree of the closeness of the tissue, and another plunger whose action, independent of the former plunger, produces the hydraulic pressure for stapling and cutting of the tissue;

said suturing and cutting head including a double action cylinder and plunger;

the surface ratio between the double action plungers located at the suturing and cutting head and at the control mechanism and the screw mechanism for moving the double action plunger in the suturing and cutting head allowing the operations to be carried out with little physical effort.

10. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 9, with the feature of having a valve in the control mechanism connected to the stapling hydraulic circuit which absorbs the excess pressure in said circuit, and indicating by its displacement that the stapling and cuttting have been performed correctly.

11. Hydraulic device with flexible body for surgical anastomosis, in accordance with claim 1, with the feature of having a valve in the control mechanism connected to the stapling hydraulic circuit which absorbs the excess pressure in said circuit, and indicating by its displacement that the stapling and cutting have been performed correctly.