WO2014083576A2

WO2014083576A2 - Surgical device with a unique cutting member shield

Info

Publication number: WO2014083576A2
Application number: PCT/IN2013/000708
Authority: WO
Inventors: Sandeep Ambardekar; Salman KAPADIA
Original assignee: Sandeep Ambardekar
Priority date: 2012-11-27
Filing date: 2013-11-22
Publication date: 2014-06-05

Abstract

A surgical device for use in minimally invasive laproscopic surgical procedures for percutaneously mutilating and debulking the tissue. The device consists of an inner hollow elongated tube (2) with a sharp edge cutting member (21) located at its distal end. This tube is positioned concentrically within the lumen of an outer hollow elongated tube (1) which features a uniquely designed cutting member shield design (17) at distal end of outer elongated hollow tube (1). The cutting member shield will serve to act as an effective anti-mutilating element. The cutting member shield can be activated by at least dedicated bi-directional rotary movement of external rotary knob. The rotary knob is designed to have at least bi-directional rotary movement. The cutting member shield (17) can be activated by a dedicated movement of external rotary knob (3) at multiple positions. Rotating the knob on multiple sides enables the physician to have a convenient control over the exposure of the sharp edge cutting member during the tissue excision procedure. Such a distinctive feature of the device would aid the surgeon to have easy manipulation and limit accidental damage to the tissue by the sharp edge cutting member during the procedure.

Description

SURGICAL DEVICE WITH A UNIQUE CUTTING MEMBER SHIELD

FIELD OF THE INVENTION

[0001] This invention relates generally to surgical device and particularly to a surgical tissue extractor with a dedicated feature for actuating the cutting member shield in minimally invasive, surgical procedures.

DESCRIPTION OF THE RELATED ART

[0002] Automatic motorized laparoscopic surgical tissue extracting device have markedly enhanced the ability to perform laparoscopic myomectomy and similar procedures. They also have had a strong impact on nongynecologic procedures such as splenectomy or nephrectomy, in which large amounts of tissue must be removed. While hand-held mechanical tissue extracting device have been available for a few decades, the newer, easier-to use laparoscopic motorized surgical tissue extracting device have contributed to the rise in total laparoscopic debulking procedures.

[0003] Automatic motorized surgical tissue extraction device are well efficient to remove even dense tissues such as partially calcified leiomyoma. Because of its sharpness, the automatic surgical tissue extraction device can cut through the vital structures as easily as it penetrates through the fibroids. It is critical that the surgeon must maintain constant visualization and that tissue be brought towards the surgical tissue extraction device and be kept away from the underlying structures.

[0004] For a laparoscopic procedure, the abdomen is inflated with gas (carbon dioxide or nitrous oxide). The gas, which is injected with a needle, pushes the abdominal wall away from the organs so that the surgeon can see them clearly. The surgical tissue extraction device is advanced towards the tissue via a trocar or a directly through the incision. Surgical tissue extraction device generally includes a gyrating hollow tube with a distal cutting edge located within an external hollow tube. A grasping instrument such as a tenaculum is passed through the inner hollow tube which grasps and pulls the tissue to be severed and the resected tissue fractions are then extracted out through it. Repeating the grasping and resection procedure the surgeon removes the large tissue in succession. This technique is referred to as "mutilation".

[0005] The typical disadvantage of mutilation is the visibility of the cutting blade once it enters deep inside the tissue. The time taken to resect the tissue is longer, and hence this process may become tedious for the operator to use.

[0006] Another alternative technique to excise the tissue is the "orange-peel technique". This method allows long, thin strips of tissue to be removed while facilitating constant visualization of anatomy surrounding the tissue being extracted. Orange-peeling although considered better from a safety standpoint, this method requires the surgeon to be skilled and trained to keep the blade on the surface of the tissue and not allow the blade to dive in. [0007] Thus, it would be desirable to provide a surgical tissue extraction device that would facilitate a surgeon to opt for either technique as per the individual's preference, dexterity and requirement and at the same time provide safety methods by preventing accidental dive in of the sharp edge cutting member tube in an efficient and user friendly manner.

[0008] The unique cutting member shield design disclosed in this invention solves the problems and shortcomings of the prior arts and thus prevents accidental injury to the tissues while the tissue extraction is carried out which allows safe method of cutting the tissue. This invention further involves a method of rotating the external rotary knob of the device in a manner to operate the cutting member shield and overcome the shortcomings involved during surgery by the surgeon for manipulation of the sharp edge cutting member.

SUMMARY OF INVENTION

[0009] The present invention relates to providing a surgical tissue extraction device with an enhanced mechanism for extending and withdrawing the cutting member shield (17) that is in continuous manner and an integral part of outer elongated hollow tube. The cutting member shield will help to maintain safe control of the sharp edge cutting member (21) exposure so that it does not cause unnecessary damage to tissues during laproscopic surgery.

[0010] This surgical tissue extraction device includes two coaxially placed hollow elongated tubes of which the inner elongated hollow tube (2) remains motor driven. The inner elongated hollow tube (2) comprises of a sharp edge cutting member (21) at its distal end and its proximal end is linked to a bevel gear mechanism.

[0011] The bevel gear is located within the pistol-grip handle of the device. The drive shaft is mounted at 90° on the cartridge of which one end when connected to a motor assembly and the other end when connected to the input pinion results in rapid spinning motion of the sharp edge cutting member.

[0012] The sharp edge cutting member (21) is configured to spin upon its axis by an electrically driven reusable and variable speed motor assembly. The motor assembly can also be controlled using a foot pedal which is meant for better control of the cutting device.

[0013] The outer elongated hollow tube (1) comprises of a unique cutting member shield (17) at its distal end which is deliberately bead rolled to function as an effective anti-mutilating element that is in continuous manner and an integral part of outer elongated hollow tube to prevent damage of the surrounding vital structure.

[0014] The novel design of the cutting member shield (17) will prevent the accidental dive in of the sharp edge cutting member (21) in the tissue. The characteristic design of the cutting member shield (17) will help safeguard against the over exposure of the sharp edge cutting member (21) and thereby prevent chance mutilation of the healthy tissue. The outer elongated hollow tube (1) is designed to have inward-outward linear motion. [0015] The outer elongated hollow tube (1) is linked to a manually operated dedicated bidirectional external rotary knob. This bi-directional external rotary knob (3) is designed to function using a slide collar (5) and a cam rotator (4).The bi-directional external rotary knob (3) will allow the shield design to be rotated in multiple directions according to the convenience of the surgeon. Unlike other designs, since anti-mutilating member is integral part of the outer tube, there is no chance of any loose piece falling in the abdominal space. The outer shield forms the integral part of the outer elongated hollow tube and hence is safe to be used.

[0016] The bi-directional external rotary knob design has four sites for rotation (fig 17, 18, 19, 20) that will lead to the movement of the shield design at multiple sites as desired by the surgeon.

1. Site 31 : No Cut,

2. Site 32: Cut,

3. Site 33: No Cut,

4. Site 34: Cut Plus.

The cam rotator (4) comprises of 4 locking sites:

1. Site 11 : No cut

2. Site 12: cut

3. Site 13: no cut

4. Site 14: cut plus

Each site is designed to provide the surgeon with operational ease of the cutting device during the severing procedure. The surgeon can apply the orange peel technique by rotating the knob to the site 32 position (fig: 18).The surgeon can exercise the mutilation technique by accessing the knob in the site 34 (fig: 20) position. Sites 31 position (fig: 17) and 33 position (fig: 19) are designed to turn off the spinning sharp edge cutting member. Incorporating such a specialized feature makes both the severing procedure as well as the surgeon's preference more versatile.

The present invention, including its embodiments and other features, will become more apparent from the following detailed description with reference to the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS

[0017] The present invention may best be understood by reference to the following description, taken in connection with the accompanying drawings in which the reference numerals designate like parts throughout the figures thereof and wherein:

FIG.01 is isometric view of the device showing the shield design at the distal end of outer tube. FIG.02 is front view of the device showing the shield design at the distal end of outer tube. FIG.03 is detailed view of the shield design. FIG.04 is sectional view of the device.

FIG.06 is top view of the device.

FIG.07 is front view of the device.

FIG.08 is top view of the device.

FIG.13 is top view of the device.

FIG.14 is isometric view of the rotary knob design present in the device.

FIG.15 is isometric view of the rotary knob design present in the device.

FIG.16 is isometric view of the device showing cam rotator has 4 locking cavity sites for the slide collar protrusion to fit in.

FIG.17 is isometric view of the device showing no cut position on the rotary knob.

FIG.18 is isometric view of the device showing cut position on the rotary knob.

FIG.19 is isometric view of the device showing no cut position on the rotary knob.

FIG.20 is isometric view of the device cut plus position on the rotary knob.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0018] The following invention describes the design of the cutting member shield and mechanism of operating the outer elongated hollow tube cutting member shield by manipulation of the sharp edge cutting member as per the surgeon's preference.

[0019] Fig: 6, 8, and 13: The superior mechanism of activating the cutting member shield (17) comprises of a bi-directional external rotary knob (3). This dedicated knob mechanism is meant to be manually operated at multiple directions.

[0020] Rotating the bi-directional external rotary knob (3) manually in the clockwise direction limits the exposure of the sharp edge cutting member (21) by extending the outer elongated hollow tube (1) in an outward linear motion.

[0021] Rotating the bi-directional external rotary knob (3) manually in the anticlockwise direction results in an additional exposure of the sharp edge cutting member (21). This is the result of the inward retraction of the outer elongated hollow tube (1).

[0022] The design of the cutting member shield mechanism (fig: 6, 8, 13) prevents accidental damage to the tissue due to over exposure of the sharp edge cutting member (21). The outer elongated hollow tube (1) can be activated manually using the bi-directional external rotary knob (3) (fig: 6, 8, 13). This outer elongated hollow tube (1) will fail to move against any other miscellaneous force or source of energy.

[0023] The bi-directional external rotary knob design (fig: 14, 15, 16) forms the core of the cutting member shield actuation mechanism. It is designed to have an inbuilt slide collar (5) and a cam rotator (4).

[0024] The cam rotator (4) has 4 locking cavity sites for the slide collar protrusion (15) to fit in

(fig: 16).

Site 11 : No Cut,

Site 12: Cut, Site 13: No Cut,

Site 14: Cut Plus.

[0025] The arrow marker on the device handle (19) indicates the position of the shield activation site. The cam rotator (4) is attached to the bi-directional external rotary knob (3) in a way that the slide collar protrusion (15) locks in the four locking cavity sites on the cam. This action will allow the cam follower to rotate in the direction in which the bi-directional external rotary knob (3) is moved.

[0026] The cam follower is located on the slide collar which slides on the cam profile through 4 separate locking cavity sites (1 1 , 12, 13, and 14). This action results in linear extension and retraction of the outer elongated hollow tube (1) as desired. A spiral coil (06) is attached with its one side resting inside the bi-directional external rotary knob (3) and the other end facing the slide collar (5) (fig: 09, 1 1).

[0027] The bi-directional external rotary knob design has four sites (fig: 17, 18, 19, 20) for rotation that will lead to the movement of the shield design at multiple sites as desired by the surgeon.

Site 31 : No Cut,

Site 32: Cut,

Site 33: No Cut,

Site 34: Cut Plus.

[0028] When the bi-directional external rotary knob (3) is at site 33 (fig: 19) (site 1 1 on cam rotator) and site 31 (fig: 17) (site 13 on cam rotator) the sharp edge cutting member (21) is entirely covered by the cutting member shield (17). When the bi-directional external rotary knob (3) is progressed towards 90 degrees clockwise to the right direction at site 32 (fig: 18) (site 12 on the cam rotator) as observed proximally the sharp edge of the cutting member (21) extends partially outwards but lies majorly within the outer elongated hollow tube (1).

[0029] The bi-directional external rotary knob (3) when further advanced to 90 degrees at site 31 (fig: 17) (site 13 on cam rotator) or regressed 90 degrees back to at site 33 (fig: 19) (site 11 on cam rotator) the shield will cover the cutting member (21) by moving the outer elongated hollow tube which is in continuous manner and an integral part of outer elongated hollow tube (1)·

[0030] If the surgeon desires to perform the mutilation action the bi-directional external rotary knob (3) has to be rotated 90 degrees in the anticlockwise direction at site 34 (fig: 20) (site 14 on cam rotator). This will result in the complete exposure of the sharp edge cutting member (21) and invariably also lead to the complete retraction of the outer elongated hollow tube (1) and the cutting member shield (17).

[0031] The bi-directional external rotary knob (3) when further advanced to 90 degrees at site 31 (fig: 17) (site 13 on cam rotator) or regressed 90 degrees back to at site 33 (fig: 19) (site 1 1 on cam rotator) the shield will cover the cutting member (21) by moving the outer elongated hollow tube which is in continuous manner and an integral part of outer elongated hollow tube (l).The spiral coil (6) will retain the follower at the designated cavity site. The bi-directional external rotary knob (3) when advanced towards (site 13) or retracted back (site 11) 90 degrees will cover the cutting member (21) by moving the outer elongated hollow tube (1).

[0032] The sharp edge cutting member (21) is activated by a drive shaft. One end of the drive shaft is attached to the motor drive and other end is inserted in the handle assembly (18) which rapidly spins the sharp edge cutting member (21).Fig: 3. The novel design of the cutting member shield (17) is deliberately bead rolled to function as an effective anti -mutilating element to avert accidental excessive severing of the tissue.

[0033] The unique cutting member shield (17) serves to provide enhanced safety against chance mutilation of the tissue and to prevent the dive in of the sharp edge cutting member (21) within the healthy tissue. Unlike other designs, since anti -mutilating member is integral part of the outer tube, there is no chance of any loose piece falling in the abdominal space. The outer shield forms the integral part of the outer elongated hollow tube and hence is safe to be used. This characteristic cutting member shield (17) by no means alters the intensity or the direction of rotational motion of the power driver sharp edge cutting member (21).

Claims

We claim :-

1) A surgical device comprising of a unique and versatile shield design that is in continuous manner and an integral part of an outer elongated hollow tube for controlled debulking of tissue from a patient body.

2) The unique shield design as claimed in claim 1 wherein it is bead rolled for an enhanced outward bulge to function as an effective anti-mutilating element to avert accidental excessive severing of tissue.

3) The unique shield design as claimed in claim 1 wherein the shield can be adjusted and actuated at more than one position and atleast in a bi-directional manner.

4) The unique shield design as claimed in claim 1 wherein the shield can be adjusted and actuated atleast in a bi-directional manner by rotation of an external rotary knob.

5) The unique shield design as claimed in claim 1 wherein it includes complete and partial exposure and non exposure of the sharp edge cutting member located at distal end of inner hollow elongated tube.

6) The unique shield design as claimed in claim 1 wherein it is adjusted by the rotary knob consisting of atleast four locking sites with no cut position, cut position, no cut position and cut plus position.

7) The unique shield design as claimed in claim 1 wherein it is adjusted and actuated by the rotary knob that is rotated towards 90 degrees clockwise to the right direction such that the sharp edge cutting member extends partially towards but lies majorly within the outer elongated hollow tube and the cutting member shield.

8) The unique shield design as claimed in claim 1 wherein it is adjusted and actuated by the rotary knob that is rotated and further advanced towards 90 degrees or regressed 90 degrees back such that it will cover the sharp edge cutting member by moving the outer elongated hollow tube.

9) The unique shield design as claimed in claim 1 wherein it is adjusted by the rotary knob that is rotated around 90 degrees in the anticlockwise direction such that the sharp edge cutting member is completely exposed to cause complete retraction of the elongated hollow tube and cutting member shield.

10) The unique shield design as claimed in claim 1 wherein it is adjusted by the rotary knob that is rotated and advanced further towards 90 degrees it will cover the cutting member by moving the

SANDEEP AMBARDEKAR

SALMAN KAPADIA